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@article{grewal_migration_1992,
title = {Migration of Caenorhabditis {elegans(Nematoda:} Rhabditidae) larvae towards bacteria and the nature of the bacterial stimulus.},
volume = {15},
shorttitle = {Migration of Caenorhabditis {elegans(Nematoda}},
number = {2},
journal = {{FUND.} {APPL.} {NEMATOL.}},
author = {Grewal, P. S. and Wright, D. J.},
year = {1992},
pages = {159--166},
file = {36448.pdf:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/NWWZ2VDQ/36448.pdf:application/pdf;Google Scholar Linked Page:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/7FBXQIKB/viewrecord.html:text/html}
},
@article{chalfie_organization_1979,
title = {Organization of neuronal microtubules in the nematode Caenorhabditis elegans},
volume = {82},
issn = {0021-9525},
url = {http://www.ncbi.nlm.nih.gov/pubmed/479300},
abstract = {We have studied the organization of microtubules in neurons of the nematode Caenorhabditis elegans. Six neurons, which we call the microtubule cells, contain bundles of darkly staining microtubules which can be followed easily in serial-section electron micrographs. Reconstruction of individual microtubules in these cells indicate that most, if not all, microtubules are short compared with the length of the cell process. Average microtubule length varies characteristically with cell type. The arrangement of microtubules gives an overall polarity to each bundle: the distal ends of the microtubles are on the outside of the bundle, whereas the proximal ends are preferentially inside. The distal and proximal ends each have a characteristic appearance indicating that these microtubules may have a polarity of their own. Short microtubules in processes of other neurons in C. elegans have also been observed.},
number = {1},
journal = {The Journal of Cell Biology},
author = {Chalfie, M and Thomson, J N},
month = jul,
year = {1979},
note = {{PMID:} 479300},
keywords = {Animals, Microtubules, Nematoda, Neurons},
pages = {278--289}
},
@article{sagan_case_2009,
title = {The Case for No First Use},
volume = {51},
issn = {0039-6338},
url = {http://www.informaworld.com.ezp-prod1.hul.harvard.edu/10.1080/00396330903011545},
doi = {10.1080/00396330903011545},
number = {3},
journal = {Survival: Global Politics and Strategy},
author = {Sagan, Scott D.},
year = {2009},
keywords = {Arms Control, Nukes, Policy, {ReadMe}},
pages = {163}
},
@article{bradski_opencv_2000,
title = {The {OpenCV} Library},
volume = {25},
issn = {{1044-789X}},
abstract = {{OpenCV} is an open-source, computer-vision library for extracting and processing meaningful data from images.
Additional resources include opencv.txt (listings).},
number = {11},
journal = {Dr. Dobb's Journal of Software Tools},
author = {Bradski, Gary},
month = nov,
year = {2000},
pages = {120, 122--125}
},
@book{rasband_image_1997,
address = {Bethesda, Maryland, {USA}},
title = {Image J},
url = {http://imagej.nih.gov/ij/},
publisher = {National Institutes of Health},
author = {Rasband, W. S.},
year = {1997}
},
@misc{kaplan_foraging_2008,
title = {Foraging Information},
author = {Kaplan, Joshua},
month = dec,
year = {2008},
note = {At Mass General Hospital, Boston, {MA.}}
},
@article{rex_tyramine_2004,
title = {Tyramine receptor {(SER-2)} isoforms are involved in the regulation of pharyngeal pumping and foraging behavior in Caenorhabditis elegans},
volume = {91},
issn = {0022-3042},
url = {http://www.ncbi.nlm.nih.gov/pubmed/15569254},
doi = {10.1111/j.1471-4159.2004.02787.x},
abstract = {Octopamine regulates essential processes in nematodes; however, little is known about the physiological role of its precursor, tyramine. In the present study, we have characterized alternatively spliced Caenorhabditis elegans tyramine receptor isoforms {(SER-2} and {SER-2A)} that differ by 23 amino acids within the mid-region of the third intracellular loop. Membranes prepared from cells expressing either {SER-2} or {SER-2A} bind {[3H]lysergic} acid diethylamide {(LSD)} in the low nanomolar range and exhibit highest affinity for tyramine. Similarly, both isoforms exhibit nearly identical Ki values for a number of antagonists. In contrast, {SER-2A} exhibits a significantly lower affinity than {SER-2} for other physiologically relevant biogenic amines, including octopamine. Pertussis toxin treatment reduces affinity for both tyramine and octopamine, especially for octopamine in membranes from cells expressing {SER-2}, suggesting that the conformation of the mid-region of the third intracellular loop is dictated by G-protein interactions and is responsible for the differential tyramine/octopamine affinities of the two isoforms. Tyramine reduces forskolin-stimulated {cAMP} levels in {HEK293} cells expressing either isoform with nearly identical {IC50} values. Tyramine, but not octopamine, also elevates Ca2+ levels in cells expressing {SER-2} and to a lesser extent {SER-2A.} Most importantly, ser-2 null mutants (pk1357) fail to suppress head movements while reversing in response to nose-touch, suggesting a role for {SER-2} in the regulation of foraging behavior, and fail to respond to tyramine in assays measuring serotonin-dependent pharyngeal pumping. These are the first reported functions for {SER-2.} These results suggest that C. elegans contains tyramine receptors, that individual {SER-2} isoforms may differ significantly in their sensitivity to other physiologically relevant biogenic amines, such as octopamine {(OA)}, and that tyraminergic signaling may be important in the regulation of key processes in nematodes.},
number = {5},
journal = {Journal of Neurochemistry},
author = {Rex, Elizabeth and Molitor, Scott C and Hapiak, Vera and Xiao, Hong and Henderson, Megan and Komuniecki, Richard},
month = dec,
year = {2004},
note = {{PMID:} 15569254},
keywords = {Adrenergic {alpha-Agonists}, Adrenergic Uptake Inhibitors, Amino Acid Sequence, Animals, Animals, Genetically Modified, Behavior, Animal, Biogenic Monoamines, Caenorhabditis elegans, Calcium, Cell Line, Cell Membrane, Cercopithecus aethiops, Cloning, Molecular, Cyclic {AMP}, Diagnostic Imaging, {DNA}, Recombinant, {Dose-Response} Relationship, Drug, Drug Interactions, Embryo, Mammalian, Embryo, Nonmammalian, Extracellular Space, Feeding Behavior, Gene Expression, Green Fluorescent Proteins, Humans, Lysergic Acid Diethylamide, Models, Molecular, Nose, Octopamine, Pertussis Toxin, Pharynx, Phenotype, Phosphatidylinositols, Protein Isoforms, Radioligand Assay, Receptors, Biogenic Amine, Reverse Transcriptase Polymerase Chain Reaction, {RNA}, Messenger, Serotonin, Time Factors, Transfection, Tritium, Tyramine},
pages = {1104--1115},
file = {PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/4MTUETQ7/15569254.html:text/html}
},
@article{__????
},
@article{seeman_nucleic_1982,
title = {Nucleic acid junctions and lattices},
volume = {99},
issn = {0022-5193},
url = {http://www.ncbi.nlm.nih.gov/pubmed/6188926},
number = {2},
journal = {Journal of Theoretical Biology},
author = {Seeman, N C},
month = nov,
year = {1982},
note = {{PMID:} 6188926},
keywords = {Base Composition, Base Sequence, {DNA}, Macromolecular Substances, Models, Molecular, {RNA}},
pages = {237--247}
},
@article{clark_afd_2006,
title = {The {AFD} sensory neurons encode multiple functions underlying thermotactic behavior in Caenorhabditis elegans},
volume = {26},
issn = {1529-2401},
url = {http://www.ncbi.nlm.nih.gov/pubmed/16837592},
doi = {10.1523/JNEUROSCI.1137-06.2006},
abstract = {The thermotactic behaviors of Caenorhabditis elegans indicate that its thermosensory system exhibits exquisite temperature sensitivity, long-term plasticity, and the ability to transform thermosensory input into different patterns of motor output. Here, we study the physiological role of the {AFD} thermosensory neurons by quantifying intracellular calcium dynamics in response to defined temperature stimuli. We demonstrate that short-term adaptation allows {AFD} to sense temperature changes as small as 0.05 degrees C over temperature ranges as wide as 10 degrees C. We show that a bidirectional thermosensory response (increasing temperature raises and decreasing temperature lowers the level of intracellular calcium in {AFD)} allows the {AFD} neurons to phase-lock their calcium dynamics to oscillatory thermosensory inputs. By analyzing the thermosensory response of {AFD} dendrites severed from their cell bodies by femtosecond laser ablation, we show that long-term plasticity is encoded as shifts in the operating range of a putative thermoreceptor(s) in the {AFD} sensory endings. Finally, we demonstrate that {AFD} activity is directly coupled to stimulation of its postsynaptic partner {AIY.} These observations indicate that many functions underlying thermotactic behavior are properties of one sensory neuronal type. Encoding multiple functions in individual sensory neurons may enable C. elegans to perform complex behaviors with simple neuronal circuits.},
number = {28},
journal = {The Journal of Neuroscience: The Official Journal of the Society for Neuroscience},
author = {Clark, Damon A and Biron, David and Sengupta, Piali and Samuel, Aravinthan D T},
month = jul,
year = {2006},
note = {{PMID:} 16837592},
keywords = {Adaptation, Physiological, Animals, Axons, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Calcium, Dendrites, Homeodomain Proteins, Interneurons, Lasers, {Long-Term} Potentiation, Mutation, Neurons, Afferent, Neuropeptides, Receptors, Odorant, Synaptic Transmission, Temperature, Thermoreceptors},
pages = {7444--7451}
},
@article{wilkening_modeling_2008,
title = {Modeling the Incubation Period of Inhalational Anthrax},
volume = {28},
url = {http://mdm.sagepub.com.ezp-prod1.hul.harvard.edu/cgi/content/abstract/28/4/593},
doi = {10.1177/0272989X08315245},
abstract = {Ever since the pioneering work of Philip Sartwell, the incubation period distribution for infectious diseases is most often modeled using a lognormal distribution. Theoretical models based on underlying disease mechanisms in the host are less well developed. This article modifies a theoretical model originally developed by Brookmeyer and others for the inhalational anthrax incubation period distribution in humans by using a more accurate distribution to represent the in vivo bacterial growth phase and by extending the model to represent the time from exposure to death, thereby allowing the model to be fit to nonhuman primate time-to-death data. The resulting incubation period distribution and the dose dependence of the median incubation period are in good agreement with human data from the 1979 accidental atmospheric anthrax release in Sverdlovsk, Russia, and limited nonhuman primate data. The median incubation period for the Sverdlovsk victims is 9.05 (95\% confidence interval = 8.0-10.3) days, shorter than previous estimates, and it is predicted to drop to less than 2.5 days at doses above 106 spores. The incubation period distribution is important because the left tail determines the time at which clinical diagnosis or syndromic surveillance systems might first detect an anthrax outbreak based on early symptomatic cases, the entire distribution determines the efficacy of medical intervention--which is determined by the speed of the prophylaxis campaign relative to the incubation period--and the right tail of the distribution influences the recommended duration for antibiotic treatment.},
number = {4},
journal = {Med Decis Making},
author = {Wilkening, Dean A.},
month = jul,
year = {2008},
pages = {593--605}
},
@misc{_jorgensen_????,
title = {Jorgensen Lab Publications},
url = {http://www.biology.utah.edu/jorgnsen_cgi_bin/publications},
howpublished = {http://www.biology.utah.edu/jorgnsen\_cgi\_bin/publications},
file = {Jorgensen Lab Publications:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/WCTPK7KM/publications.html:text/html}
},
@article{miyawaki_fluorescent_1997,
title = {Fluorescent indicators for Ca2+ based on green fluorescent proteins and calmodulin},
volume = {388},
issn = {0028-0836},
url = {http://www.ncbi.nlm.nih.gov/pubmed/9278050},
doi = {10.1038/42264},
abstract = {Important Ca2+ signals in the cytosol and organelles are often extremely localized and hard to measure. To overcome this problem we have constructed new fluorescent indicators for Ca2+ that are genetically encoded without cofactors and are targetable to specific intracellular locations. We have dubbed these fluorescent indicators 'cameleons'. They consist of tandem fusions of a blue- or cyan-emitting mutant of the green fluorescent protein {(GFP)}, calmodulin, the calmodulin-binding peptide M13, and an enhanced green- or yellow-emitting {GFP.} Binding of Ca2+ makes calmodulin wrap around the M13 domain, increasing the fluorescence resonance energy transfer {(FRET)} between the flanking {GFPs.} Calmodulin mutations can tune the Ca2+ affinities to measure free Ca2+ concentrations in the range 10(-8) to 10(-2) M. We have visualized free Ca2+ dynamics in the cytosol, nucleus and endoplasmic reticulum of single {HeLa} cells transfected with complementary {DNAs} encoding chimaeras bearing appropriate localization signals. Ca2+ concentration in the endoplasmic reticulum of individual cells ranged from 60 to 400 {microM} at rest, and 1 to 50 {microM} after Ca2+ mobilization. {FRET} is also an indicator of the reversible intermolecular association of {cyan-GFP-labelled} calmodulin with {yellow-GFP-labelled} M13. Thus {FRET} between {GFP} mutants can monitor localized Ca2+ signals and protein heterodimerization in individual live cells.},
number = {6645},
journal = {Nature},
author = {Miyawaki, A and Llopis, J and Heim, R and {McCaffery}, J M and Adams, J A and Ikura, M and Tsien, R Y},
month = aug,
year = {1997},
note = {{PMID:} 9278050},
keywords = {Amino Acid Sequence, Calcium, Calmodulin, Cytosol, Energy Transfer, Fluorescence, Green Fluorescent Proteins, Hela Cells, Humans, Indicators and Reagents, Luminescent Proteins, Molecular Sequence Data, Mutagenesis, {Myosin-Light-Chain} Kinase, Peptide Fragments, Recombinant Fusion Proteins},
pages = {882--887}
},
@article{steinhauer_superresolution_2008,
title = {Superresolution microscopy on the basis of engineered dark states},
volume = {130},
issn = {1520-5126},
url = {http://www.ncbi.nlm.nih.gov/pubmed/19053449},
doi = {10.1021/ja806590m},
abstract = {New concepts for superresolution fluorescence microscopy by subsequent localization of single molecules using photoswitchable or photoactivatable fluorophores are rapidly emerging and provide new ways to resolve structures beyond the diffraction limit. Here, we demonstrate that superresolution imaging can be carried out with practically every single-molecule compatible, synthetic fluorophore by controlling their emission properties. We prepare dark states by removing oxygen that extends the triplet state lifetime to several milliseconds. We further increase the duration of the off-states using electron transfer reactions to create radical ion states of severalfold longer lifetimes. Imaging single molecules, actin filaments, and microtubules in fixed cells as well as simulations demonstrate that the thus created dark states are sufficiently long for resolution of approximately 50 nm.},
number = {50},
journal = {Journal of the American Chemical Society},
author = {Steinhauer, Christian and Forthmann, Carsten and Vogelsang, Jan and Tinnefeld, Philip},
month = dec,
year = {2008},
note = {{PMID:} 19053449},
keywords = {Actins, Microscopy, Fluorescence, Sensitivity and Specificity},
pages = {16840--16841}
},
@article{marcon_--fly_2010,
title = {{'On-the-fly'} optical encoding of combinatorial peptide libraries for profiling of protease specificity},
volume = {6},
issn = {1742-2051},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20024084},
doi = {10.1039/b909087h},
abstract = {Large solid-phase combinatorial libraries currently play an important role in areas such as infectious disease biomarker discovery, profiling of protease specificity and anticancer drug discovery. Because compounds on solid support beads are not positionally-encoded as they are in microarrays, innovative methods of encoding are required. There are many advantages associated with optical encoding and several strategies have been described in the literature to combine fluorescence encoding methods with solid-phase library synthesis. We have previously introduced an alternative fluorescence-based encoding method ("colloidal barcoding"), which involves encoding 10-20 mum support beads during a split-and-mix synthesis with smaller 0.6-0.8 mum silica colloids that contain specific and identifiable combinations of fluorescent dye. The power of this 'on-the-fly' encoding approach lies in the efficient use of a small number of fluorescent dyes to encode millions of compounds. Described herein, for the first time, is the use of a colloid-barcoded library in a biological assay (i.e., protease profiling) combined with the use of confocal microscopy to decode the colloidal barcode. In this proof-of-concept demonstration, a small focussed peptide library was optically-encoded during a combinatorial synthesis, incubated with a protease (trypsin), analysed by flow cytometry and decoded via confocal microscopy. During assay development, a range of parameters were investigated and optimised, including substrate (or probe) loading, barcode stability, characteristics of the peptide-tagging fluorophore, and spacer group configuration. Through successful decoding of the colloidal barcodes, it was confirmed that specific peptide sequences presenting one or two cleavage sites were recognised by trypsin while peptide sequences not cleavable by trypsin remained intact.},
number = {1},
journal = {Molecular {bioSystems}},
author = {Marcon, Lionel and Battersby, Bronwyn J and Rühmann, Andreas and Ford, Kym and Daley, Matthew and Lawrie, Gwendolyn A and Trau, Matt},
month = jan,
year = {2010},
note = {{PMID:} 20024084},
keywords = {Combinatorial Chemistry Techniques, Flow Cytometry, Models, Theoretical, Peptide Hydrolases, Peptide Library, Substrate Specificity},
pages = {225--233}
},
@article{tsien_green_1998,
title = {The green fluorescent protein},
volume = {67},
issn = {0066-4154},
url = {http://www.ncbi.nlm.nih.gov/pubmed/9759496},
doi = {10.1146/annurev.biochem.67.1.509},
abstract = {In just three years, the green fluorescent protein {(GFP)} from the jellyfish Aequorea victoria has vaulted from obscurity to become one of the most widely studied and exploited proteins in biochemistry and cell biology. Its amazing ability to generate a highly visible, efficiently emitting internal fluorophore is both intrinsically fascinating and tremendously valuable. High-resolution crystal structures of {GFP} offer unprecedented opportunities to understand and manipulate the relation between protein structure and spectroscopic function. {GFP} has become well established as a marker of gene expression and protein targeting in intact cells and organisms. Mutagenesis and engineering of {GFP} into chimeric proteins are opening new vistas in physiological indicators, biosensors, and photochemical memories.},
journal = {Annual Review of Biochemistry},
author = {Tsien, R Y},
year = {1998},
note = {{PMID:} 9759496},
keywords = {Biological Markers, Genes, Reporter, Green Fluorescent Proteins, Indicators and Reagents, Luminescent Proteins},
pages = {509--544},
file = {PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/HGVKESEN/9759496.html:text/html}
},
@article{zheng_neuronal_1999,
title = {Neuronal control of locomotion in C. elegans is modified by a dominant mutation in the {GLR-1} ionotropic glutamate receptor},
volume = {24},
issn = {0896-6273},
url = {http://www.ncbi.nlm.nih.gov/pubmed/10571229},
abstract = {How simple neuronal circuits control behavior is not well understood at the molecular or genetic level. In Caenorhabditis elegans, foraging behavior consists of long, forward movements interrupted by brief reversals. To determine how this pattern is generated and regulated, we have developed novel perturbation techniques that allow us to depolarize selected neurons in vivo using the dominant glutamate receptor mutation identified in the Lurcher mouse. Transgenic worms that expressed a mutated C. elegans glutamate receptor in interneurons that control locomotion displayed a remarkable and unexpected change in their behavior-they rapidly alternated between forward and backward coordinated movement. Our findings suggest that the gating of movement reversals is controlled in a partially distributed fashion by a small subset of interneurons and that this gating is modified by sensory input.},
number = {2},
journal = {Neuron},
author = {Zheng, Y and Brockie, P J and Mellem, J E and Madsen, D M and Maricq, A V},
month = oct,
year = {1999},
note = {{PMID:} 10571229},
keywords = {Amino Acid Sequence, Animals, Animals, Genetically Modified, Apoptosis, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Caspase 1, Gene Expression, Genes, Dominant, Interneurons, Ion Channels, Mechanoreceptors, Membrane Proteins, Molecular Sequence Data, Motor Activity, Mutation, Nerve Tissue Proteins, Neural Pathways, Neurons, Phenotype, Promoter Regions, Genetic, Quan Recommends, Receptors, {AMPA}, Receptors, Glutamate, Sensation},
pages = {347--361},
file = {PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/KRR7HDVB/10571229.html:text/html;science.pdf:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/VPUSET9Z/science.pdf:application/pdf}
},
@article{piggott_neural_2011,
title = {The Neural Circuits and Synaptic Mechanisms Underlying Motor Initiation in C. elegans},
volume = {147},
issn = {1097-4172},
url = {http://www.ncbi.nlm.nih.gov/pubmed/22078887},
doi = {10.1016/j.cell.2011.08.053},
abstract = {C. elegans is widely used to dissect how neural circuits and genes generate behavior. During locomotion, worms initiate backward movement to change locomotion direction spontaneously or in response to sensory cues; however, the underlying neural circuits are not well defined. We applied a multidisciplinary approach to map neural circuits in freely behaving worms by integrating functional imaging, optogenetic interrogation, genetic manipulation, laser ablation, and electrophysiology. We found that a disinhibitory circuit and a stimulatory circuit together promote initiation of backward movement and that circuitry dynamics is differentially regulated by sensory cues. Both circuits require glutamatergic transmission but depend on distinct glutamate receptors. This dual mode of motor initiation control is found in mammals, suggesting that distantly related organisms with anatomically distinct nervous systems may adopt similar strategies for motor control. Additionally, our studies illustrate how a multidisciplinary approach facilitates dissection of circuit and synaptic mechanisms underlying behavior in a genetic model organism.},
number = {4},
journal = {Cell},
author = {Piggott, Beverly J and Liu, Jie and Feng, Zhaoyang and Wescott, Seth A and Xu, X Z Shawn},
month = nov,
year = {2011},
note = {{PMID:} 22078887},
pages = {922--933},
file = {science.pdf:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/V6FUUAQJ/science.pdf:application/pdf}
},
@article{kralj_electrical_2011,
title = {Electrical spiking in Escherichia coli probed with a fluorescent voltage-indicating protein},
volume = {333},
issn = {1095-9203},
url = {http://www.ncbi.nlm.nih.gov/pubmed/21764748},
doi = {10.1126/science.1204763},
abstract = {Bacteria have many voltage- and ligand-gated ion channels, and population-level measurements indicate that membrane potential is important for bacterial survival. However, it has not been possible to probe voltage dynamics in an intact bacterium. Here we developed a method to reveal electrical spiking in Escherichia coli. To probe bacterial membrane potential, we engineered a voltage-sensitive fluorescent protein based on green-absorbing proteorhodopsin. Expression of the proteorhodopsin optical proton sensor {(PROPS)} in E. coli revealed electrical spiking at up to 1 hertz. Spiking was sensitive to chemical and physical perturbations and coincided with rapid efflux of a small-molecule fluorophore, suggesting that bacterial efflux machinery may be electrically regulated.},
number = {6040},
journal = {Science {(New} York, {N.Y.)}},
author = {Kralj, Joel M and Hochbaum, Daniel R and Douglass, Adam D and Cohen, Adam E},
month = jul,
year = {2011},
note = {{PMID:} 21764748},
keywords = {Action Potentials, Escherichia coli, Fluorescence, Fluorescent Dyes, {Hydrogen-Ion} Concentration, Ion Channels, Ion Transport, Light, Membrane Potentials, Protons, Rhodamines, Rhodopsin, Spectrometry, Fluorescence, Stress, Physiological},
pages = {345--348}
},
@article{hell_far-field_2007,
title = {Far-field optical nanoscopy},
volume = {316},
issn = {1095-9203},
url = {http://www.ncbi.nlm.nih.gov/pubmed/17525330},
doi = {10.1126/science.1137395},
abstract = {In 1873, Ernst Abbe discovered what was to become a well-known paradigm: the inability of a lens-based optical microscope to discern details that are closer together than half of the wavelength of light. However, for its most popular imaging mode, fluorescence microscopy, the diffraction barrier is crumbling. Here, I discuss the physical concepts that have pushed fluorescence microscopy to the nanoscale, once the prerogative of electron and scanning probe microscopes. Initial applications indicate that emergent far-field optical nanoscopy will have a strong impact in the life sciences and in other areas benefiting from nanoscale visualization.},
number = {5828},
journal = {Science {(New} York, {N.Y.)}},
author = {Hell, Stefan W},
month = may,
year = {2007},
note = {{PMID:} 17525330},
keywords = {Animals, Humans, Light, Microscopy, Fluorescence, Nanotechnology},
pages = {1153--1158}
},
@article{ke_multilayer_2009,
title = {Multilayer {DNA} origami packed on a square lattice},
volume = {131},
issn = {1520-5126},
url = {http://www.ncbi.nlm.nih.gov/pubmed/19807088},
doi = {10.1021/ja906381y},
abstract = {Molecular self-assembly using {DNA} as a structural building block has proven to be an efficient route to the construction of nanoscale objects and arrays of increasing complexity. Using the remarkable "scaffolded {DNA} origami" strategy, Rothemund demonstrated that a long single-stranded {DNA} from a viral genome {(M13)} can be folded into a variety of custom two-dimensional {(2D)} shapes using hundreds of short synthetic {DNA} molecules as staple strands. More recently, we generalized a strategy to build custom-shaped, three-dimensional {(3D)} objects formed as pleated layers of helices constrained to a honeycomb lattice, with precisely controlled dimensions ranging from 10 to 100 nm. Here we describe a more compact design for {3D} origami, with layers of helices packed on a square lattice, that can be folded successfully into structures of designed dimensions in a one-step annealing process, despite the increased density of {DNA} helices. A square lattice provides a more natural framework for designing rectangular structures, the option for a more densely packed architecture, and the ability to create surfaces that are more flat than is possible with the honeycomb lattice. Thus enabling the design and construction of custom {3D} shapes from helices packed on a square lattice provides a general foundational advance for increasing the versatility and scope of {DNA} nanotechnology.},
number = {43},
journal = {Journal of the American Chemical Society},
author = {Ke, Yonggang and Douglas, Shawn M and Liu, Minghui and Sharma, Jaswinder and Cheng, Anchi and Leung, Albert and Liu, Yan and Shih, William M and Yan, Hao},
month = nov,
year = {2009},
note = {{PMID:} 19807088},
keywords = {{DNA}, Nucleic Acid Conformation},
pages = {15903--15908}
},
@article{white_structure_1976,
title = {The Structure of the Ventral Nerve Cord of Caenorhabditis elegans},
volume = {275},
url = {http://rstb.royalsocietypublishing.org/content/275/938/327.abstract},
doi = {10.1098/rstb.1976.0086},
abstract = {The nervous system of Caenorhabditis elegans is arranged as a series of fibre bundles which run along internal hypodermal ridges. Most of the sensory integration takes place in a ring of nerve fibres which is wrapped round the pharynx in the head. The body muscles in the head are innervated by motor neurones in this nerve ring while those in the lower part of the body are innervated by a set of motor neurones in a longitudinal fibre bundle which joins the nerve ring, the ventral cord. These motor neurones can be put into five classes on the basis of their morphology and synaptic input. At any one point along the cord only one member from each class has neuromuscular junctions. Members of a given class are arranged in a regular linear sequence in the cord and have non-overlapping fields of motor synaptic activity, the transition between fields of adjacent neurones being sharp and well defined. Members of a given class form gap junctions with neighbouring members of the same class but never to motor neurones of another class. Three of the motor neurone classes receive their synaptic input from a set of interneurones coming from the nerve ring. These interneurones can in turn be grouped into four classes and each of the three motor neurone classes receives its synaptic input from a unique combination of interneurone classes. The possible developmental and functional significance of these observations is discussed.},
number = {938},
journal = {Philosophical Transactions of the Royal Society of London. B, Biological Sciences},
author = {White, J. G. and Southgate, Eileen and Thomson, J. N. and Brenner, S.},
year = {1976},
pages = {327 --348},
file = {Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/R4K57MBU/327.html:text/html}
},
@article{nagel_light_2005,
title = {Light Activation of Channelrhodopsin-2 in Excitable Cells of Caenorhabditis elegans Triggers Rapid Behavioral Responses},
volume = {15},
issn = {0960-9822},
url = {http://www.sciencedirect.com/science/article/B6VRT-4HV7CDJ-W/2/c2d98908e8dbee2808aa298cf3c7e0d2},
doi = {10.1016/j.cub.2005.11.032},
abstract = {Summary
For studying the function of specific neurons in their native circuitry, it is desired to precisely control their activity. This often requires dissection to allow accurate electrical stimulation [1] or neurotransmitter application [2], and it is thus inherently difficult in live animals, especially in small model organisms. Here, we employed channelrhodopsin-2 {(ChR2)}, a directly light-gated cation channel from the green alga Chlamydomonas reinhardtii [3], in excitable cells of the nematode Caenorhabditis elegans, to trigger specific behaviors, simply by illumination. Channelrhodopsins 3 and 4 are 7-transmembrane-helix proteins that resemble the light-driven proton pump bacteriorhodopsin [5], and they also utilize the chromophore all-trans retinal, but to open an intrinsic cation pore. In muscle cells, light-activated {ChR2} evoked strong, simultaneous contractions, which were reduced in the background of mutated L-type, voltage-gated Ca2+-channels {(VGCCs)} and ryanodine receptors {(RyRs).} Electrophysiological analysis demonstrated rapid inward currents that persisted as long as the illumination. When {ChR2} was expressed in mechanosensory neurons, light evoked withdrawal behaviors that are normally elicited by mechanical stimulation. Furthermore, {ChR2} enabled activity of these neurons in mutants lacking the {MEC-4/MEC-10} mechanosensory ion channel [6]. Thus, specific neurons or muscles expressing {ChR2} can be quickly and reversibly activated by light in live and behaving, as well as dissected, animals.},
number = {24},
journal = {Current Biology},
author = {Nagel, Georg and Brauner, Martin and Liewald, Jana F. and Adeishvili, Nona and Bamberg, Ernst and Gottschalk, Alexander},
month = dec,
year = {2005},
keywords = {Caenorhabditis elegans, {MOLNEURO}, optogenics, {SIGNALING}},
pages = {2279--2284}
},
@article{boyden_history_2011,
title = {A history of optogenetics: the development of tools for controlling brain circuits with light},
volume = {3},
issn = {{1757594X}},
shorttitle = {A history of optogenetics},
url = {http://f1000.com/reports/b/3/11/},
doi = {10.3410/B3-11},
journal = {F1000 Biology Reports},
author = {Boyden, Edward},
month = may,
year = {2011}
},
@article{park_analysis_2007,
title = {Analysis of nematode mechanics by piezoresistive displacement clamp},
volume = {104},
issn = {0027-8424},
url = {http://www.ncbi.nlm.nih.gov/pubmed/17962419},
doi = {10.1073/pnas.0702138104},
abstract = {Studying animal mechanics is critical for understanding how signals in the neuromuscular system give rise to behavior and how force-sensing organs and sensory neurons work. Few techniques exist to provide forces and displacements appropriate for such studies. To address this technological gap, we developed a metrology using piezoresistive cantilevers as force-displacement sensors coupled to a feedback system to apply and maintain defined load profiles to micrometer-scale animals. We show that this system can deliver forces between 10(-8) and 10(-3) N across distances of up to 100 mum with a resolution of 12 {nN} between 0.1 Hz and 100 {kHz.} We use this new metrology to show that force-displacement curves of wild-type nematodes {(Caenorhabditis} elegans) are linear. Because nematodes have approximately cylindrical bodies, this finding demonstrates that nematode body mechanics can be modeled as a cylindrical shell under pressure. Little is known about the relative importance of hydrostatic pressure and shell mechanics, however. We show that dissipating pressure by cuticle puncture or decreasing it by hyperosmotic shock has only a modest effect on stiffness, whereas defects in the dpy-5 and lon-2 genes, which alter body shape and cuticle proteins, decrease and increase stiffness by 25\% and 50\%, respectively. This initial analysis of C. elegans body mechanics suggests that shell mechanics dominates stiffness and is a first step in understanding how body mechanics affect locomotion and force sensing.},
number = {44},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
author = {Park, {Sung-Jin} and Goodman, Miriam B and Pruitt, Beth L},
month = oct,
year = {2007},
note = {{PMID:} 17962419},
keywords = {Animals, Biomechanics, Caenorhabditis elegans, Microscopy, Electron, Transmission, Models, Biological, Sepharose},
pages = {17376--17381},
file = {Analysis of nematode mechanics by piezoresistive displacement clamp — PNAS:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/N3IMRCKI/17376.full.html:text/html;PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/852TM379/17962419.html:text/html}
},
@article{long_support_2010,
title = {Support for a synaptic chain model of neuronal sequence generation},
volume = {468},
issn = {1476-4687},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20972420},
doi = {10.1038/nature09514},
abstract = {In songbirds, the remarkable temporal precision of song is generated by a sparse sequence of bursts in the premotor nucleus {HVC.} To distinguish between two possible classes of models of neural sequence generation, we carried out intracellular recordings of {HVC} neurons in singing zebra finches {(Taeniopygia} guttata). We found that the subthreshold membrane potential is characterized by a large, rapid depolarization 5-10 ms before burst onset, consistent with a synaptically connected chain of neurons in {HVC.} We found no evidence for the slow membrane potential modulation predicted by models in which burst timing is controlled by subthreshold dynamics. Furthermore, bursts ride on an underlying depolarization of ∼10-ms duration, probably the result of a regenerative calcium spike within {HVC} neurons that could facilitate the propagation of activity through a chain network with high temporal precision. Our results provide insight into the fundamental mechanisms by which neural circuits can generate complex sequential behaviours.},
number = {7322},
journal = {Nature},
author = {Long, Michael A and Jin, Dezhe Z and Fee, Michale S},
month = nov,
year = {2010},
note = {{PMID:} 20972420},
keywords = {Animals, Calcium Channels, {L-Type}, Calcium Signaling, Finches, Male, Membrane Potentials, Models, Neurological, Neural Pathways, Neurons, Sleep, Synapses, Vocalization, Animal},
pages = {394--399}
},
@article{chow_high-performance_2010,
title = {High-performance genetically targetable optical neural silencing by light-driven proton pumps},
volume = {463},
issn = {1476-4687},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20054397},
doi = {10.1038/nature08652},
abstract = {The ability to silence the activity of genetically specified neurons in a temporally precise fashion would provide the opportunity to investigate the causal role of specific cell classes in neural computations, behaviours and pathologies. Here we show that members of the class of light-driven outward proton pumps can mediate powerful, safe, multiple-colour silencing of neural activity. The gene archaerhodopsin-3 {(Arch)} from Halorubrum sodomense enables near-100\% silencing of neurons in the awake brain when virally expressed in the mouse cortex and illuminated with yellow light. Arch mediates currents of several hundred picoamps at low light powers, and supports neural silencing currents approaching 900 {pA} at light powers easily achievable in vivo. Furthermore, Arch spontaneously recovers from light-dependent inactivation, unlike light-driven chloride pumps that enter long-lasting inactive states in response to light. These properties of Arch are appropriate to mediate the optical silencing of significant brain volumes over behaviourally relevant timescales. Arch function in neurons is well tolerated because {pH} excursions created by Arch illumination are minimized by self-limiting mechanisms to levels comparable to those mediated by channelrhodopsins or natural spike firing. To highlight how proton pump ecological and genomic diversity may support new innovation, we show that the blue-green light-drivable proton pump from the fungus Leptosphaeria maculans {(Mac)} can, when expressed in neurons, enable neural silencing by blue light, thus enabling alongside other developed reagents the potential for independent silencing of two neural populations by blue versus red light. Light-driven proton pumps thus represent a high-performance and extremely versatile class of 'optogenetic' voltage and ion modulator, which will broadly enable new neuroscientific, biological, neurological and psychiatric investigations.},
number = {7277},
journal = {Nature},
author = {Chow, Brian Y and Han, Xue and Dobry, Allison S and Qian, Xiaofeng and Chuong, Amy S and Li, Mingjie and Henninger, Michael A and Belfort, Gabriel M and Lin, Yingxi and Monahan, Patrick E and Boyden, Edward S},
month = jan,
year = {2010},
note = {{PMID:} 20054397},
keywords = {Action Potentials, Animals, Ascomycota, Color, Electric Conductivity, Euryarchaeota, Genetic Engineering, {Hydrogen-Ion} Concentration, Mice, Molecular Sequence Data, Neocortex, Neurons, Proton Pumps, Rhodopsins, Microbial, Wakefulness},
pages = {98--102}
},
@article{shih_knitting_2010,
title = {Knitting complex weaves with {DNA} origami},
volume = {20},
issn = {{1879-033X}},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20456942},
doi = {10.1016/j.sbi.2010.03.009},
abstract = {The past three decades have witnessed steady growth in our ability to harness {DNA} branched junctions as building blocks for programmable self-assembly of diverse supramolecular architectures. The {DNA-origami} method, which exploits the availability of long {DNA} sequences to template sophisticated nanostructures, has played a major role in extending this trend through the past few years. Today, two-dimensional and three-dimensional custom-shaped nanostructures comparable in mass to a small virus can be designed, assembled, and characterized with a prototyping cycle on the order of a couple of weeks.},
number = {3},
journal = {Current Opinion in Structural Biology},
author = {Shih, William M and Lin, Chenxiang},
month = jun,
year = {2010},
note = {{PMID:} 20456942},
keywords = {Base Sequence, {DNA}, Nanostructures, Nanotechnology},
pages = {276--282}
},
@article{hart_synaptic_1995,
title = {Synaptic code for sensory modalities revealed by C. elegans {GLR-1} glutamate receptor},
volume = {378},
url = {http://dx.doi.org/10.1038/378082a0},
doi = {10.1038/378082a0},
number = {6552},
journal = {Nature},
author = {Hart, Anne C. and Sims, Shannon and Kaplan, Joshua M.},
month = nov,
year = {1995},
keywords = {{PQE} - definite citation, Sniffing / Foraging},
pages = {82--85},
file = {378082a0.pdf:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/UTTGHAPB/378082a0.pdf:application/pdf}
},
@article{naumann_monitoring_2010,
title = {Monitoring neural activity with bioluminescence during natural behavior},
volume = {13},
issn = {1546-1726},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20305645},
doi = {10.1038/nn.2518},
abstract = {Existing techniques for monitoring neural activity in awake, freely behaving vertebrates are invasive and difficult to target to genetically identified neurons. We used bioluminescence to non-invasively monitor the activity of genetically specified neurons in freely behaving zebrafish. Transgenic fish with the Ca(2+)-sensitive photoprotein green fluorescent protein {(GFP)-Aequorin} in most neurons generated large and fast bioluminescent signals that were related to neural activity, neuroluminescence, which could be recorded continuously for many days. To test the limits of this technique, we specifically targeted {GFP-Aequorin} to the hypocretin-positive neurons of the hypothalamus. We found that neuroluminescence generated by this group of approximately 20 neurons was associated with periods of increased locomotor activity and identified two classes of neural activity corresponding to distinct swim latencies. Our neuroluminescence assay can report, with high temporal resolution and sensitivity, the activity of small subsets of neurons during unrestrained behavior.},
number = {4},
journal = {Nature Neuroscience},
author = {Naumann, Eva A and Kampff, Adam R and Prober, David A and Schier, Alexander F and Engert, Florian},
month = apr,
year = {2010},
note = {{PMID:} 20305645},
keywords = {Aequorin, Animals, Animals, Genetically Modified, Behavior, Animal, Green Fluorescent Proteins, Intracellular Signaling Peptides and Proteins, Luminescent Proteins, Motor Activity, Nerve Net, Neuropeptides, Zebrafish},
pages = {513--520}
},
@article{rust_sub-diffraction-limit_2006,
title = {Sub-diffraction-limit imaging by stochastic optical reconstruction microscopy {(STORM)}},
volume = {3},
issn = {1548-7091},
url = {http://www.ncbi.nlm.nih.gov/pubmed/16896339},
doi = {10.1038/nmeth929},
abstract = {We have developed a high-resolution fluorescence microscopy method based on high-accuracy localization of photoswitchable fluorophores. In each imaging cycle, only a fraction of the fluorophores were turned on, allowing their positions to be determined with nanometer accuracy. The fluorophore positions obtained from a series of imaging cycles were used to reconstruct the overall image. We demonstrated an imaging resolution of 20 nm. This technique can, in principle, reach molecular-scale resolution.},
number = {10},
journal = {Nature Methods},
author = {Rust, Michael J and Bates, Mark and Zhuang, Xiaowei},
month = oct,
year = {2006},
note = {{PMID:} 16896339},
keywords = {{DNA}, Fluorescent Dyes, Image Interpretation, {Computer-Assisted}, Microscopy, Fluorescence, Nanotechnology, Stochastic Processes},
pages = {793--795}
},
@article{ryu_thermotaxis_2002,
title = {Thermotaxis in Caenorhabditis elegans Analyzed by Measuring Responses to Defined Thermal Stimuli},
volume = {22},
url = {http://www.jneurosci.org/cgi/content/abstract/22/13/5727},
doi = {20026542},
abstract = {In a spatial thermal gradient, Caenorhabditis elegans migrates toward and then isothermally tracks near its cultivation temperature. A current model for thermotactic behavior involves a thermophilic drive (involving the neurons {AFD} and {AIY)} and cryophilic drive (involving the neuron {AIZ)} that balance at the cultivation temperature. Here, we analyze the movements of individual worms responding to defined thermal gradients. We found evidence for a mechanism for migration down thermal gradients that is active at temperatures above the cultivation temperature, and a mechanism for isothermal tracking that is active near the cultivation temperature. However, we found no evidence for a mechanism for migration up thermal gradients at temperatures below the cultivation temperature that might have supported the model of opposing drives. The mechanisms for migration down gradients and isothermal tracking control the worm's movements in different manners. Migration down gradients works by shortening (lengthening) the duration of forward movement in response to positive (negative) temperature changes. Isothermal tracking works by orienting persistent forward movement to offset temperature changes. We believe preference for the cultivation temperature is not at the balance between two drives. Instead, the worm activates the mechanism for isothermal tracking near the cultivation temperature and inactivates the mechanism for migration down gradients near or below the cultivation temperature. Inactivation of the mechanism for migration down gradients near or below the cultivation temperature requires the neurons {AFD} and {AIY.}},
number = {13},
journal = {Jounral of Neuroscience},
author = {Ryu, William S. and Samuel, Aravinthan D. T.},
month = jul,
year = {2002},
pages = {5727--5733},
file = {HighWire Full Text PDF:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/MBAAG2VT/Ryu and Samuel - 2002 - Thermotaxis in Caenorhabditis elegans Analyzed by .pdf:application/pdf;HighWire Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/IJET2I6W/5727.html:text/html}
},
@article{boyden_millisecond-timescale_2005,
title = {Millisecond-timescale, genetically targeted optical control of neural activity},
volume = {8},
issn = {1097-6256},
url = {http://www.ncbi.nlm.nih.gov/pubmed/16116447},
doi = {10.1038/nn1525},
abstract = {Temporally precise, noninvasive control of activity in well-defined neuronal populations is a long-sought goal of systems neuroscience. We adapted for this purpose the naturally occurring algal protein Channelrhodopsin-2, a rapidly gated light-sensitive cation channel, by using lentiviral gene delivery in combination with high-speed optical switching to photostimulate mammalian neurons. We demonstrate reliable, millisecond-timescale control of neuronal spiking, as well as control of excitatory and inhibitory synaptic transmission. This technology allows the use of light to alter neural processing at the level of single spikes and synaptic events, yielding a widely applicable tool for neuroscientists and biomedical engineers.},
number = {9},
journal = {Nature Neuroscience},
author = {Boyden, Edward S and Zhang, Feng and Bamberg, Ernst and Nagel, Georg and Deisseroth, Karl},
month = sep,
year = {2005},
note = {{PMID:} 16116447},
keywords = {Action Potentials, Algal Proteins, Animals, Animals, Newborn, Cells, Cultured, {Dose-Response} Relationship, Radiation, Electric Stimulation, Electrophysiology, Excitatory Amino Acid Antagonists, {GABA} Antagonists, Green Fluorescent Proteins, Hippocampus, Ion Channel Gating, Ion Channels, Neural Inhibition, Neurons, Optics and Photonics, Photobiology, Pyridazines, Quinoxalines, Rats, Rats, {Sprague-Dawley}, Reaction Time, Reproducibility of Results, Rhodopsin, Synaptic Transmission, Time Factors, Transfection},
pages = {1263--1268}
},
@article{liu_crystalline_2011,
title = {Crystalline two-dimensional {DNA-origami} arrays},
volume = {50},
issn = {1521-3773},
url = {http://www.ncbi.nlm.nih.gov/pubmed/21053236},
doi = {10.1002/anie.201005911},
number = {1},
journal = {Angewandte Chemie {(International} Ed. in English)},
author = {Liu, Wenyan and Zhong, Hong and Wang, Risheng and Seeman, Nadrian C},
month = jan,
year = {2011},
note = {{PMID:} 21053236},
keywords = {Crystallization, {DNA}, Microscopy, Electron, Scanning, Nanostructures, Nucleic Acid Conformation, Oligonucleotide Array Sequence Analysis},
pages = {264--267}
},
@article{szobota_remote_2007,
title = {Remote control of neuronal activity with a light-gated glutamate receptor},
volume = {54},
issn = {0896-6273},
url = {http://www.ncbi.nlm.nih.gov/pubmed/17521567},
doi = {10.1016/j.neuron.2007.05.010},
abstract = {The ability to stimulate select neurons in isolated tissue and in living animals is important for investigating their role in circuits and behavior. We show that the engineered light-gated ionotropic glutamate receptor {(LiGluR)}, when introduced into neurons, enables remote control of their activity. Trains of action potentials are optimally evoked and extinguished by 380 nm and 500 nm light, respectively, while intermediate wavelengths provide graded control over the amplitude of depolarization. Light pulses of 1-5 ms in duration at approximately 380 nm trigger precisely timed action potentials and {EPSP-like} responses or can evoke sustained depolarizations that persist for minutes in the dark until extinguished by a short pulse of approximately 500 nm light. When introduced into sensory neurons in zebrafish larvae, activation of {LiGluR} reversibly blocks the escape response to touch. Our studies show that {LiGluR} provides robust control over neuronal activity, enabling the dissection and manipulation of neural circuitry in vivo.},
number = {4},
journal = {Neuron},
author = {Szobota, Stephanie and Gorostiza, Pau and Del Bene, Filippo and Wyart, Claire and Fortin, Doris L and Kolstad, Kathleen D and Tulyathan, Orapim and Volgraf, Matthew and Numano, Rika and Aaron, Holly L and Scott, Ethan K and Kramer, Richard H and Flannery, John and Baier, Herwig and Trauner, Dirk and Isacoff, Ehud Y},
month = may,
year = {2007},
note = {{PMID:} 17521567},
keywords = {Action Potentials, Animals, Animals, Genetically Modified, Animals, Newborn, Behavior, Animal, Cells, Cultured, Cysteine, {Dose-Response} Relationship, Radiation, Electric Stimulation, Excitatory Postsynaptic Potentials, Hippocampus, Larva, Leucine, Lighting, Mutation, Neurons, {Patch-Clamp} Techniques, Physical Stimulation, Rats, Receptors, Kainic Acid, Transfection, Zebrafish},
pages = {535--545}
},
@article{suzuki_topological_1985,
title = {Topological structural analysis of digitized binary images by border following},
volume = {30},
issn = {{0734-189X}},
url = {http://www.sciencedirect.com.ezp-prod1.hul.harvard.edu/science/article/B7GXG-4D8FS1C-M/2/a8579386448407d3a26b09845e194acc},
doi = {10.1016/0734-189X(85)90016-7},
abstract = {Two border following algorithms are proposed for the topological analysis of digitized binary images. The first one determines the surroundness relations among the borders of a binary image. Since the outer borders and the hole borders have a one-to-one correspondence to the connected components of 1-pixels and to the holes, respectively, the proposed algorithm yields a representation of a binary image, from which one can extract some sort of features without reconstructing the image. The second algorithm, which is a modified version of the first, follows only the outermost borders (i.e., the outer borders which are not surrounded by holes). These algorithms can be effectively used in component counting, shrinking, and topological structural analysis of binary images, when a sequential digital computer is used.},
number = {1},
journal = {Computer Vision, Graphics, and Image Processing},
author = {Suzuki, Satoshi and be, {KeiichiA}},
month = apr,
year = {1985},
pages = {32--46}
},
@article{bui_programmable_2010,
title = {Programmable periodicity of quantum dot arrays with {DNA} origami nanotubes},
volume = {10},
issn = {1530-6992},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20681601},
doi = {10.1021/nl101079u},
abstract = {To fabricate quantum dot arrays with programmable periodicity, functionalized {DNA} origami nanotubes were developed. Selected {DNA} staple strands were biotin-labeled to form periodic binding sites for streptavidin-conjugated quantum dots. Successful formation of arrays with periods of 43 and 71 nm demonstrates precise, programmable, large-scale nanoparticle patterning; however, limitations in array periodicity were also observed. Statistical analysis of {AFM} images revealed evidence for steric hindrance or site bridging that limited the minimum array periodicity.},
number = {9},
journal = {Nano Letters},
author = {Bui, Hieu and Onodera, Craig and Kidwell, Carson and Tan, {YerPeng} and Graugnard, Elton and Kuang, Wan and Lee, Jeunghoon and Knowlton, William B and Yurke, Bernard and Hughes, William L},
month = sep,
year = {2010},
note = {{PMID:} 20681601},
keywords = {{DNA}, Microscopy, Atomic Force, Nanotubes, Quantum Dots},
pages = {3367--3372}
},
@article{feng_imaging_2004,
title = {An imaging system for standardized quantitative analysis of C. elegans behavior},
volume = {5},
url = {http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=517925},
doi = {10.1186/1471-2105-5-115},
journal = {{BMC} Bioinformatics},
author = {Feng, Zhaoyang and Cronin, Christopher J and Jr, John H Wittig, and Sternberg, Paul W and Schafer, William R},
year = {2004},
note = {{PMC517925}},
keywords = {Direct Competitor, Image Processing, {PQE} - definite citation},
pages = {115},
file = {PubMed Central Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/JRWI8JAP/articlerender.html:text/html}
},
@phdthesis{chen_neuronal_2007,
address = {Cold Sporing Harbor Laboratory,: Cold Spring Harbor},
type = {Thesis},
title = {Neuronal Network of C. elegans: from Anatomy to Behavior},
school = {Watson School of Biological Sciences},
author = {Chen, Beth L},
year = {2007},
note = {p. 96}
},
@misc{_yongshin_????,
title = {Yongshin Yu's Blog: {HOW} {TO:} Use {CDT} and {MinGW} for Eclipse (i.e. develop {C/C++} applications in windows)},
url = {http://yongshin.blogspot.com/2005/11/how-to-use-cdt-and-mingw-for-eclipse.html},
keywords = {{OpenCV}, Programming},
howpublished = {http://yongshin.blogspot.com/2005/11/how-to-use-cdt-and-mingw-for-eclipse.html}
},
@article{rothemund_folding_2006,
title = {Folding {DNA} to create nanoscale shapes and patterns},
volume = {440},
issn = {1476-4687},
url = {http://www.ncbi.nlm.nih.gov/pubmed/16541064},
doi = {10.1038/nature04586},
abstract = {{'Bottom-up} fabrication', which exploits the intrinsic properties of atoms and molecules to direct their self-organization, is widely used to make relatively simple nanostructures. A key goal for this approach is to create nanostructures of high complexity, matching that routinely achieved by 'top-down' methods. The self-assembly of {DNA} molecules provides an attractive route towards this goal. Here I describe a simple method for folding long, single-stranded {DNA} molecules into arbitrary two-dimensional shapes. The design for a desired shape is made by raster-filling the shape with a 7-kilobase single-stranded scaffold and by choosing over 200 short oligonucleotide 'staple strands' to hold the scaffold in place. Once synthesized and mixed, the staple and scaffold strands self-assemble in a single step. The resulting {DNA} structures are roughly 100 nm in diameter and approximate desired shapes such as squares, disks and five-pointed stars with a spatial resolution of 6 nm. Because each oligonucleotide can serve as a 6-nm pixel, the structures can be programmed to bear complex patterns such as words and images on their surfaces. Finally, individual {DNA} structures can be programmed to form larger assemblies, including extended periodic lattices and a hexamer of triangles (which constitutes a 30-megadalton molecular complex).},
number = {7082},
journal = {Nature},
author = {Rothemund, Paul W K},
month = mar,
year = {2006},
note = {{PMID:} 16541064},
keywords = {Art, Bacteriophage M13, Biopolymers, {DNA}, {DNA}, {Single-Stranded}, {DNA}, Viral, Microscopy, Atomic Force, Nanostructures, Nanotechnology, Nucleic Acid Conformation},
pages = {297--302}
},
@misc{_mechanotransduction_????,
title = {Mechanotransduction in the Nematode Caenorhabditis elegans},
url = {http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=mechano.chapter.182},
keywords = {{PQE} - definite citation, Re}
},
@article{baran_c._1999,
title = {The C. elegans homeodomain gene unc-42 regulates chemosensory and glutamate receptor expression},
volume = {126},
url = {http://dev.biologists.org/cgi/content/abstract/126/10/2241},
number = {10},
journal = {Development},
author = {Baran, R and Aronoff, R and Garriga, G},
month = may,
year = {1999},
pages = {2241--2251},
file = {HighWire Full Text PDF:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/8JGBGHCK/Baran et al - 1999 - The C elegans homeodomain gene unc-42 regulates c.pdf:application/pdf;HighWire Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/JRVH3G8C/2241.html:text/html;The C. elegans homeodomain gene unc-42 regulates chemosensory and glutamate receptor expression -- Baran et al. 126 (10): 2241 -- Development:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/Z6HQ47NM/2241.html:text/html}
},
@misc{_fast20inverse20square20root.pdf_????,
title = {{Fast20Inverse20Square20Root.pdf}},
url = {http://mceniry.net/papers/Fast%20Inverse%20Square%20Root.pdf}
},
@book{kandel_essentials_1995,
title = {Essentials of neural science and behavior},
isbn = {9780838522455},
abstract = {This book introduces undergraduate students to the fundamentals of biology in mental processes.},
publisher = {{McGraw-Hill} Professional},
author = {Kandel, Eric R. and Schwartz, James Harris and Jessell, Thomas M.},
year = {1995},
keywords = {Behavior, Medical / Mental Health, Medical / Neurology, Medical / Neuroscience, Nervous System/ physiology, Neurosciences, Psychology / Neuropsychology, Science / Life Sciences / Neuroscience}
},
@article{stephens_modes_2010,
title = {From Modes to Movement in the Behavior of Caenorhabditis elegans},
volume = {5},
url = {http://dx.doi.org/10.1371/journal.pone.0013914},
doi = {10.1371/journal.pone.0013914},
abstract = {Organisms move through the world by changing their shape, and here we explore the mapping from shape space to movements in the nematode Caenorhabditis elegans as it crawls on an agar plate. We characterize the statistics of the trajectories through the correlation functions of the orientation angular velocity, orientation angle and the mean-squared displacement, and we find that the loss of orientational memory has significant contributions from both abrupt, large amplitude turning events and the continuous dynamics between these events. Further, we discover long-time persistence of orientational memory in the intervals between abrupt turns. Building on recent work demonstrating that C. elegans movements are restricted to a low-dimensional shape space, we construct a map from the dynamics in this shape space to the trajectory of the worm along the agar. We use this connection to illustrate that changes in the continuous dynamics reveal subtle differences in movement strategy that occur among mutants defective in two classes of dopamine receptors.},
number = {11},
journal = {{PLoS} {ONE}},
author = {Stephens, Greg J. and {Johnson-Kerner}, Bethany and Bialek, William and Ryu, William S.},
month = nov,
year = {2010},
pages = {e13914}
},
@article{jungmann_single-molecule_2010,
title = {Single-molecule kinetics and super-resolution microscopy by fluorescence imaging of transient binding on {DNA} origami},
volume = {10},
issn = {1530-6992},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20957983},
doi = {10.1021/nl103427w},
abstract = {{DNA} origami is a powerful method for the programmable assembly of nanoscale molecular structures. For applications of these structures as functional biomaterials, the study of reaction kinetics and dynamic processes in real time and with high spatial resolution becomes increasingly important. We present a single-molecule assay for the study of binding and unbinding kinetics on {DNA} origami. We find that the kinetics of hybridization to single-stranded extensions on {DNA} origami is similar to isolated substrate-immobilized {DNA} with a slight position dependence on the origami. On the basis of the knowledge of the kinetics, we exploit reversible specific binding of labeled oligonucleotides to {DNA} nanostructures for {PAINT} (points accumulation for imaging in nanoscale topography) imaging with {\textless}30 nm resolution. The method is demonstrated for flat monomeric {DNA} structures as well as multimeric, ribbon-like {DNA} structures.},
number = {11},
journal = {Nano Letters},
author = {Jungmann, Ralf and Steinhauer, Christian and Scheible, Max and Kuzyk, Anton and Tinnefeld, Philip and Simmel, Friedrich C},
month = nov,
year = {2010},
note = {{PMID:} 20957983},
keywords = {Binding Sites, {DNA}, Image Enhancement, Kinetics, Microscopy, Fluorescence, Molecular Probe Techniques},
pages = {4756--4761}
},
@misc{_mcintire_????,
title = {{McIntire} Lab - Steve {McIntire}, {M.D.}, {Ph.D.}},
url = {http://www.galloresearch.org/index.php/investigators/mcintirelab}
},
@article{liedl_self-assembly_2010,
title = {Self-assembly of three-dimensional prestressed tensegrity structures from {DNA}},
volume = {5},
issn = {1748-3395},
url = {http://www.ncbi.nlm.nih.gov/pubmed/20562873},
doi = {10.1038/nnano.2010.107},
abstract = {Tensegrity, or tensional integrity, is a property of a structure indicating a reliance on a balance between components that are either in pure compression or pure tension for stability. Tensegrity structures exhibit extremely high strength-to-weight ratios and great resilience, and are therefore widely used in engineering, robotics and architecture. Here, we report nanoscale, prestressed, three-dimensional tensegrity structures in which rigid bundles of {DNA} double helices resist compressive forces exerted by segments of single-stranded {DNA} that act as tension-bearing cables. Our {DNA} tensegrity structures can self-assemble against forces up to 14 {pN}, which is twice the stall force of powerful molecular motors such as kinesin or myosin. The forces generated by this molecular prestressing mechanism can be used to bend the {DNA} bundles or to actuate the entire structure through enzymatic cleavage at specific sites. In addition to being building blocks for nanostructures, tensile structural elements made of single-stranded {DNA} could be used to study molecular forces, cellular mechanotransduction and other fundamental biological processes.},
number = {7},
journal = {Nature Nanotechnology},
author = {Liedl, Tim and Högberg, Björn and Tytell, Jessica and Ingber, Donald E and Shih, William M},
month = jul,
year = {2010},
note = {{PMID:} 20562873},
keywords = {{DNA}, Nucleic Acid Conformation, Physicochemical Phenomena, Stress, Mechanical},
pages = {520--524}
},
@article{ramot_bidirectional_2008,
title = {Bidirectional temperature-sensing by a single thermosensory neuron in C. elegans},
volume = {11},
issn = {1546-1726},
url = {http://www.ncbi.nlm.nih.gov.ezp-prod1.hul.harvard.edu/pubmed/18660808},
doi = {10.1038/nn.2157},
abstract = {Humans and other animals can sense temperature changes as small as 0.1 degree C. How animals achieve such exquisite sensitivity is poorly understood. By recording from the C. elegans thermosensory neurons {AFD} in vivo, we found that cooling closes and warming opens ion channels. We found that {AFD} thermosensitivity, which exceeds that of most biological processes by many orders of magnitude, is achieved by nonlinear signal amplification. Mutations in genes encoding subunits of a cyclic guanosine monophosphate {(cGMP)-gated} ion channel (tax-4 and tax-2) and transmembrane guanylate cyclases (gcy-8, gcy-18 and gcy-23) eliminated both cooling- and warming-activated thermoreceptor currents, indicating that a {cGMP-mediated} pathway links variations in temperature to changes in ionic currents. The resemblance of C. elegans thermosensation to vertebrate photosensation and the sequence similarity between {TAX-4} and {TAX-2} and subunits of the rod phototransduction channel raise the possibility that nematode thermosensation and vertebrate vision are linked by conserved evolution.},
number = {8},
journal = {Nature Neuroscience},
author = {Ramot, Daniel and {MacInnis}, Bronwyn L and Goodman, Miriam B},
month = aug,
year = {2008},
note = {{PMID:} 18660808},
keywords = {Adaptation, Physiological, Animals, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Calcium Signaling, Cold Temperature, Cyclic {GMP}, Guanylate Cyclase, Hot Temperature, Ion Channels, Membrane Potentials, Mutagenesis, {Site-Directed}, Neurons, Afferent, {Patch-Clamp} Techniques, Protein Subunits, Reaction Time, Temperature, Thermosensing},
pages = {908--915}
},
@phdthesis{luo_thermotactic_2009,
title = {Thermotactic behavior in C. elegans and Drosophila larvae},
school = {Harvard University},
author = {Luo, Linjiao},
year = {2009}
},
@misc{wormbase_wormbase_2009,
title = {{WormBase}, release {WS201}},
author = {{WormBase}},
month = may,
year = {2009}
},
@article{han_dna_2011,
title = {{DNA} origami with complex curvatures in three-dimensional space},
volume = {332},
issn = {1095-9203},
url = {http://www.ncbi.nlm.nih.gov/pubmed/21493857},
doi = {10.1126/science.1202998},
abstract = {We present a strategy to design and construct self-assembling {DNA} nanostructures that define intricate curved surfaces in three-dimensional {(3D)} space using the {DNA} origami folding technique. Double-helical {DNA} is bent to follow the rounded contours of the target object, and potential strand crossovers are subsequently identified. Concentric rings of {DNA} are used to generate in-plane curvature, constrained to {2D} by rationally designed geometries and crossover networks. Out-of-plane curvature is introduced by adjusting the particular position and pattern of crossovers between adjacent {DNA} double helices, whose conformation often deviates from the natural, B-form twist density. A series of {DNA} nanostructures with high curvature--such as {2D} arrangements of concentric rings and {3D} spherical shells, ellipsoidal shells, and a nanoflask--were assembled.},
number = {6027},
journal = {Science {(New} York, {N.Y.)}},
author = {Han, Dongran and Pal, Suchetan and Nangreave, Jeanette and Deng, Zhengtao and Liu, Yan and Yan, Hao},
month = apr,
year = {2011},
note = {{PMID:} 21493857},
keywords = {{DNA}, Models, Molecular, Nanostructures, Nanotechnology, Nucleic Acid Conformation},
pages = {342--346}
},
@article{vilardaga_gpcr_2009,
title = {{GPCR} and G proteins: drug efficacy and activation in live cells},
volume = {23},
issn = {1944-9917},
shorttitle = {{GPCR} and G proteins},
url = {http://www.ncbi.nlm.nih.gov/pubmed/19196832},
doi = {10.1210/me.2008-0204},
abstract = {Many biochemical pathways are driven by G protein-coupled receptors, cell surface proteins that convert the binding of extracellular chemical, sensory, and mechanical stimuli into cellular signals. Their interaction with various ligands triggers receptor activation that typically couples to and activates heterotrimeric G proteins, which in turn control the propagation of secondary messenger molecules (e.g. {cAMP)} involved in critically important physiological processes (e.g. heart beat). Successful transfer of information from ligand binding events to intracellular signaling cascades involves a dynamic interplay between ligands, receptors, and G proteins. The development of Förster resonance energy transfer and bioluminescence resonance energy transfer-based methods has now permitted the kinetic analysis of initial steps involved in G protein-coupled receptor-mediated signaling in live cells and in systems as diverse as neurotransmitter and hormone signaling. The direct measurement of ligand efficacy at the level of the receptor by Förster resonance energy transfer is also now possible and allows intrinsic efficacies of clinical drugs to be linked with the effect of receptor polymorphisms.},
number = {5},
journal = {Molecular Endocrinology {(Baltimore}, Md.)},
author = {Vilardaga, {Jean-Pierre} and Bünemann, Moritz and Feinstein, Timothy N and Lambert, Nevin and Nikolaev, Viacheslav O and Engelhardt, Stefan and Lohse, Martin J and Hoffmann, Carsten},
month = may,
year = {2009},
note = {{PMID:} 19196832},
keywords = {Animals, Fluorescence Resonance Energy Transfer, {GTP-Binding} Proteins, Humans, Kinetics, Luminescent Measurements, Models, Biological, Receptors, {G-Protein-Coupled}, Signal Transduction},
pages = {590--599}
},
@article{chen_wiring_2006,
title = {Wiring optimization can relate neuronal structure and function},
volume = {103},
issn = {0027-8424},
url = {http://www.ncbi.nlm.nih.gov/pubmed/16537428},
doi = {10.1073/pnas.0506806103},
abstract = {We pursue the hypothesis that neuronal placement in animals minimizes wiring costs for given functional constraints, as specified by synaptic connectivity. Using a newly compiled version of the Caenorhabditis elegans wiring diagram, we solve for the optimal layout of 279 nonpharyngeal neurons. In the optimal layout, most neurons are located close to their actual positions, suggesting that wiring minimization is an important factor. Yet some neurons exhibit strong deviations from "optimal" position. We propose that biological factors relating to axonal guidance and command neuron functions contribute to these deviations. We capture these factors by proposing a modified wiring cost function.},
number = {12},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
author = {Chen, Beth L and Hall, David H and Chklovskii, Dmitri B},
month = mar,
year = {2006},
note = {{PMID:} 16537428},
keywords = {Animals, Caenorhabditis elegans, Models, Neurological, Neurons, Synapses},
pages = {4723--4728}
},
@article{kristan_rhythmic_1976,
title = {Rhythmic swimming activity in neurones of the isolated nerve cord of the leech},
volume = {65},
issn = {0022-0949},
url = {http://www.ncbi.nlm.nih.gov/pubmed/1018167},
abstract = {1. Repeating bursts of motor neurone impulses have been recorded from the nerves of completely isolated nerve cords of the medicinal leech. The salient features of this burst rhythm are similar to those obtained in the semi-intact preparation during swimming. Hence the basic swimming rhythm is generated by a central oscillator. 2. Quantitative comparisons between the impulse patterns obtained from the isolated nerve cord and those obtained from a semi-intact preparation show that the variation in both dorsal to ventral motor neurone phasing and burst duration with swim cycle period differ in these two preparations. 3. The increase of intersegmental delay with period, which is a prominent feature of swimming behaviour of the intact animal, is not seen in either the semi-intact or isolated cord preparations. 4. In the semi-intact preparation, stretching the body wall or depolarizing an inhibitory motor neurone changes the burst duration of excitatory motor neurones in the same segment. In the isolated nerve cord, these manipulations also change the period of the swim cycle in the entire cord. 5. These comparisons suggest that sensory input stabilizes the centrally generated swimming rhythm, determines the phasing of the bursts of impulses from dorsal and ventral motor neurones, and matches the intersegmental delay to the cycle period so as to maintain a constant body shape at all rates of swimming.},
number = {3},
journal = {The Journal of Experimental Biology},
author = {Kristan, W B, Jr and Calabrese, R L},
month = dec,
year = {1976},
note = {{PMID:} 1018167},
keywords = {Action Potentials, Animals, Ganglia, Leeches, Motor Neurons, Movement, Muscles, Nervous System, Nervous System Physiological Phenomena, Periodicity, Proprioception},
pages = {643--668}
},
@book{dawes_advances_????,
address = {London},
title = {Advances in Parasitology},
publisher = {Academic Press},
author = {Dawes, Ben},
keywords = {Parasitology}
},
@article{ohagan_mec-4_2005,
title = {The {MEC-4} {DEG/ENaC} channel of Caenorhabditis elegans touch receptor neurons transduces mechanical signals},
volume = {8},
issn = {1097-6256},
url = {http://www.ncbi.nlm.nih.gov/pubmed/15580270},
doi = {10.1038/nn1362},
abstract = {Transformation of mechanical energy into ionic currents is essential for touch, hearing and nociception. Although {DEG/ENaC} proteins are believed to form sensory mechanotransduction channels, the evidence for this role remains indirect. By recording from C. elegans touch receptor neurons in vivo, we found that external force evokes rapidly activating mechanoreceptor currents {(MRCs)} carried mostly by Na(+) and blocked by amiloride-characteristics consistent with direct mechanical gating of a {DEG/ENaC} channel. Like mammalian Pacinian corpuscles, these neurons depolarized with both positive and negative changes in external force but not with sustained force. Null mutations in the {DEG/ENaC} gene mec-4 and in the accessory ion channel subunit genes mec-2 and mec-6 eliminated {MRCs.} In contrast, the genetic elimination of touch neuron-specific microtubules reduced, but did not abolish, {MRCs.} Our findings link the application of external force to the activation of a molecularly defined metazoan sensory transduction channel.},
number = {1},
journal = {Nature Neuroscience},
author = {{O'Hagan}, Robert and Chalfie, Martin and Goodman, Miriam B},
month = jan,
year = {2005},
note = {{PMID:} 15580270},
keywords = {Amiloride, Animals, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Electric Conductivity, Mechanoreceptors, Mechanotransduction, Cellular, Membrane Proteins, Mutation, Physical Stimulation, Print Me!, Sodium, Sodium Channels, Touch},
pages = {43--50},
file = {nn1362.pdf:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/E53CEMII/nn1362.pdf:application/pdf;PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/IUWTAI52/15580270.html:text/html}
},
@misc{evans_official_2011,
title = {The Official {YAML} Web Site},
url = {http://yaml.org/},
journal = {{YAML:} {YAML} Ain't Markup Language},
author = {Evans, Clarkj},
year = {2011},
howpublished = {http://yaml.org/},
file = {The Official YAML Web Site:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/KJ6GFZ6I/yaml.org.html:text/html}
},
@article{livolsi_projectors_2008,
title = {Projectors and {PC} Gaming},
shorttitle = {Projectors and {PC} Gaming},
url = {http://web.archive.org/web/20110104033820/http://www.projectorcentral.com/pc_gaming_projectors.htm},
journal = {{ProjectorCentral.com}},
author = {Livolsi, Bill},
month = aug,
year = {2008},
file = {Projectors and PC Gaming:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/ZAT6A9HH/pc_gaming_projectors.html:text/html}
},
@article{troemel_divergent_1995,
title = {Divergent seven transmembrane receptors are candidate chemosensory receptors in C. elegans},
volume = {83},
issn = {0092-8674},
url = {http://www.ncbi.nlm.nih.gov/pubmed/7585938},
abstract = {Using their senses of taste and smell, animals recognize a wide variety of chemicals. The nematode C. elegans has only fourteen types of chemosensory neurons, but it responds to dozens of chemicals, because each chemosensory neuron detects several stimuli. Here we describe over 40 highly divergent members of the G protein-coupled receptor family that could contribute to this functional diversity. Most of these candidate receptor genes are in clusters of two to nine similar genes. Eleven of fourteen tested genes appear to be expressed in small subsets of chemosensory neurons. A single type of chemosensory neuron can potentially express at least four different receptor genes. Some of these genes might encode receptors for water-soluble attractants, repellents, and pheromones.},
number = {2},
journal = {Cell},
author = {Troemel, E R and Chou, J H and Dwyer, N D and Colbert, H A and Bargmann, C I},
month = oct,
year = {1995},
note = {{PMID:} 7585938},
keywords = {{1-Octanol}, Amino Acid Sequence, Animals, Animals, Genetically Modified, Behavior, Animal, Benzaldehydes, Caenorhabditis elegans, Chemoreceptor Cells, Female, Gene Expression, Genes, Helminth, Genes, Reporter, Male, Molecular Sequence Data, Multigene Family, Octanols, Receptors, Cell Surface, Recombinant Fusion Proteins, Sequence Analysis, {DNA}, Sequence Homology, Amino Acid, Sex Characteristics, Smell, Tissue Distribution},
pages = {207--18},
file = {PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/7PUCEAWD/7585938.html:text/html}
},
@article{huang_breaking_2010,
title = {Breaking the diffraction barrier: super-resolution imaging of cells},
volume = {143},
issn = {1097-4172},
shorttitle = {Breaking the diffraction barrier},
url = {http://www.ncbi.nlm.nih.gov/pubmed/21168201},
doi = {10.1016/j.cell.2010.12.002},
abstract = {Anyone who has used a light microscope has wished that its resolution could be a little better. Now, after centuries of gradual improvements, fluorescence microscopy has made a quantum leap in its resolving power due, in large part, to advancements over the past several years in a new area of research called super-resolution fluorescence microscopy. In this Primer, we explain the principles of various super-resolution approaches, such as {STED}, {(S)SIM}, and {STORM/(F)PALM.} Then, we describe recent applications of super-resolution microscopy in cells, which demonstrate how these approaches are beginning to provide new insights into cell biology, microbiology, and neurobiology.},
number = {7},
journal = {Cell},
author = {Huang, Bo and Babcock, Hazen and Zhuang, Xiaowei},
month = dec,
year = {2010},
note = {{PMID:} 21168201},
keywords = {Animals, Cytological Techniques, Humans, Microscopy, Fluorescence},
pages = {1047--1058}
},
@article{dejneka_rare_2003,
title = {Rare earth-doped glass microbarcodes},
volume = {100},
issn = {0027-8424},
url = {http://www.ncbi.nlm.nih.gov/pubmed/12515864},
doi = {10.1073/pnas.0236044100},
abstract = {The development of ultraminiaturized identification tags has applications in fields ranging from advanced biotechnology to security. This paper describes micrometer-sized glass barcodes containing a pattern of different fluorescent materials that are easily identified by using a {UV} lamp and an optical microscope. A model {DNA} hybridization assay using these "microbarcodes" is described. Rare earth-doped glasses were chosen because of their narrow emission bands, high quantum efficiencies, noninterference with common fluorescent labels, and inertness to most organic and aqueous solvents. These properties and the large number ({\textgreater}1 million) of possible combinations of these microbarcodes make them attractive for use in multiplexed bioassays and general encoding.},
number = {2},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
author = {Dejneka, Matthew J and Streltsov, Alexander and Pal, Santona and Frutos, Anthony G and Powell, Christy L and Yost, Kevin and Yuen, Po Ki and Müller, Uwe and Lahiri, Joydeep},
month = jan,
year = {2003},
note = {{PMID:} 12515864},
keywords = {Biotechnology, {DNA}, Fluorescent Dyes, Metals, Rare Earth, Nucleic Acid Hybridization},
pages = {389--393}
},
@article{tavernarakis_molecular_1997,
title = {Molecular modeling of mechanotransduction in the nematode Caenorhabditis elegans},
volume = {59},
issn = {0066-4278},
url = {http://www.ncbi.nlm.nih.gov/pubmed/9074782},
doi = {10.1146/annurev.physiol.59.1.659},
abstract = {Genetic and molecular studies of touch avoidance in the nematode Caenorhabditis elegans have resulted in a molecular model for a mechanotransducing complex. mec-4 and mec-10 encode proteins hypothesized to be subunits of a mechanically gated ion channel that are related to subunits of the vertebrate amiloride-sensitive epithelial Na+ channel. Products of mec-5, a novel collagen, and mec-9, a protein that includes multiple Kunitz-type protease inhibitor repeats and {EGF} repeats, may interact with the channel in the extracellular matrix. Inside the cell, specialized 15-protofilament microtubules composed of mec-12 alpha-tubulin and mec-7 beta-tubulin may be linked to the mechanosensitive channel by stomatin-homologous {MEC-2.} {MEC-4} and {MEC-10} are members of a large family of C. elegans proteins, the degenerins. Two other degenerins, {UNC-8} and {DEL-1}, are candidate components of a stretch-sensitive channel in motor neurons. Implications for advancing understanding of mechanotransduction in other systems are discussed.},
journal = {Annual Review of Physiology},
author = {Tavernarakis, N and Driscoll, M},
year = {1997},
note = {{PMID:} 9074782},
keywords = {Animals, Caenorhabditis elegans, Humans, Mechanoreceptors, Models, Molecular, Physical Stimulation, Signal Transduction, Touch},
pages = {659--689},
file = {PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/QV2BT6PF/entrez.html:text/html}
},
@article{aldaye_assembling_2008,
title = {Assembling materials with {DNA} as the guide},
volume = {321},
issn = {1095-9203},
url = {http://www.ncbi.nlm.nih.gov/pubmed/18818351},
doi = {10.1126/science.1154533},
abstract = {{DNA's} remarkable molecular recognition properties and structural features make it one of the most promising templates to pattern materials with nanoscale precision. The emerging field of {DNA} nanotechnology strips this molecule from any preconceived biological role and exploits its simple code to generate addressable nanostructures in one, two, and three dimensions. These structures have been used to precisely position proteins, nanoparticles, transition metals, and other functional components into deliberately designed patterns. They can also act as templates for the growth of nanowires, aid in the structural determination of proteins, and provide new platforms for genomics applications. The field of {DNA} nanotechnology is growing in a number of directions, carrying with it the promise to substantially affect materials science and biology.},
number = {5897},
journal = {Science {(New} York, {N.Y.)}},
author = {Aldaye, Faisal A and Palmer, Alison L and Sleiman, Hanadi F},
month = sep,
year = {2008},
note = {{PMID:} 18818351},
keywords = {Biotechnology, {DNA}, Genomics, Metal Nanoparticles, Nanostructures, Nanotechnology, Nucleic Acid Conformation, Proteomics},
pages = {1795--1799}
},
@article{peng_straightening_2008,
title = {Straightening Caenorhabditis elegans images},
volume = {24},
number = {2},
journal = {Bioinformatics},
author = {Peng, H. and Long, F. and Liu, X. and Kim, S. K and Myers, E. W},
year = {2008},
pages = {234},
file = {worm.straighten.pdf:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/TICKWIIU/worm.straighten.pdf:application/pdf}
},
@article{curtis_seeing_2006,
title = {Seeing what the mouse sees with its vibrissae: a matter of behavioral state},
volume = {50},
issn = {0896-6273},
shorttitle = {Seeing what the mouse sees with its vibrissae},
url = {http://www.ncbi.nlm.nih.gov/pubmed/16701202},
doi = {10.1016/j.neuron.2006.05.004},
abstract = {The behavioral state of an animal is accompanied by ongoing brain activity that primes neuronal circuitry to sensory inputs. While it should come as no surprise that the pattern of cortical activation is tied to behavioral states, only now has this dependence been imaged. In this issue of Neuron, Ferezou, Bolea, and Petersen show that the level and spatial extent of activation of vibrissa sensory cortex critically depend on behavioral context and mode of stimulation, i.e., passive versus active contact.},
number = {4},
journal = {Neuron},
author = {Curtis, John C and Kleinfeld, David},
month = may,
year = {2006},
note = {{PMID:} 16701202},
keywords = {Anesthesia, General, Animals, Behavior, Animal, Brain Mapping, Mice, Research Design, Somatosensory Cortex, Touch, Vibrissae, Wakefulness},
pages = {524--526},
file = {PubMed Snapshot:/Users/andy/Library/Application Support/Firefox/Profiles/x5qrcnjz.default/zotero/storage/MI4V4R22/16701202.html:text/html}
},
@article{hilliard_c._2002,
title = {C. elegans responds to chemical repellents by integrating sensory inputs from the head and the tail},
volume = {12},
issn = {0960-9822},
url = {http://www.ncbi.nlm.nih.gov.ezp-prod1.hul.harvard.edu/pubmed/12007416},
abstract = {The phasmids are bilateral sensory organs located in the tail of Caenorhabditis elegans and other nematodes. The similar structures of the phasmids and the amphid chemosensory organs in the head have long suggested a chemosensory function for the phasmids. However, the {PHA} and {PHB} phasmid neurons are not required for chemotaxis or for dauer formation, and no direct proof of a chemosensory function of the phasmids has been obtained. C. elegans avoids toxic chemicals by reversing its movement, and this behavior is mediated by sensory neurons of the amphid, particularly, the {ASH} neurons. Here we show that the {PHA} and {PHB} phasmid neurons function as chemosensory cells that negatively modulate reversals to repellents. The antagonistic activity of head and tail sensory neurons is integrated to generate appropriate escape behaviors: detection of a repellent by head neurons mediates reversals, which are suppressed by antagonistic inputs from tail neurons. Our results suggest that C. elegans senses repellents by defining a head-to-tail spatial map of the chemical environment.},
number = {9},
journal = {Current Biology: {CB}},
author = {Hilliard, Massimo A and Bargmann, Cornelia I and Bazzicalupo, Paolo},
month = apr,
year = {2002},
note = {{PMID:} 12007416},
keywords = {Animals, Caenorhabditis elegans, Chemoreceptor Cells, Chemotaxis, Head, Movement, Neurons, Afferent, Signal Transduction, Tail},
pages = {730--734}
},
@article{yu_sensory_1999,
title = {Sensory feedback can coordinate the swimming activity of the leech},
volume = {19},
issn = {1529-2401},
url = {http://www.ncbi.nlm.nih.gov/pubmed/10341261},
abstract = {Previous studies showed that sensory feedback from the body wall is important and sometimes critical for generating normal, robust swimming activity in leeches. In this paper, we evaluate the role of sensory feedback in intersegmental coordination using both behavioral and physiological measurements. We severed the ventral nerve cord of leeches in midbody and then made video and in situ extracellular recordings from swimming animals. Our electrophysiological recordings unequivocally demonstrate that active intersegmental coordination occurs in leeches with severed nerve cords, refuting earlier conclusions that sensory feedback cannot coordinate swimming activity. Intersegmental coordination can in fact be achieved by sensory feedback alone, without the intersegmental interactions conveyed by the nerve cord.},
number = {11},
journal = {The Journal of Neuroscience: The Official Journal of the Society for Neuroscience},
author = {Yu, X and Nguyen, B and Friesen, W O},
month = jun,
year = {1999},
note = {{PMID:} 10341261},
keywords = {Animals, Feedback, Ganglia, Invertebrate, Leeches, Sensation, Swimming, Video Recording},
pages = {4634--4643}
},
@misc{__????-1,
url = {http://www.pnas.org/content/102/9/3184.full.pdf+html}
},
@article{zhang_multimodal_2007,
title = {Multimodal fast optical interrogation of neural circuitry},
volume = {446},
issn = {0028-0836},
url = {http://dx.doi.org/10.1038/nature05744},
doi = {10.1038/nature05744},
abstract = {Our understanding of the cellular implementation of systems-level neural processes like action, thought and emotion has been limited by the availability of tools to interrogate specific classes of neural cells within intact, living brain tissue. Here we identify and develop an archaeal light-driven chloride pump {(NpHR)} from Natronomonas pharaonis for temporally precise optical inhibition of neural activity. {NpHR} allows either knockout of single action potentials, or sustained blockade of spiking. {NpHR} is compatible with {ChR2}, the previous optical excitation technology we have described, in that the two opposing probes operate at similar light powers but with well-separated action spectra. {NpHR}, like {ChR2}, functions in mammals without exogenous cofactors, and the two probes can be integrated with calcium imaging in mammalian brain tissue for bidirectional optical modulation and readout of neural activity. Likewise, {NpHR} and {ChR2} can be targeted together to Caenorhabditis elegans muscle and cholinergic motor neurons to control locomotion bidirectionally. {NpHR} and {ChR2} form a complete system for multimodal, high-speed, genetically targeted, all-optical interrogation of living neural circuits.},
number = {7136},
journal = {Nature},