Optogenetic analysis of synaptic transmission in the central nervous system of the nematode Caenorhabditis elegans.
Optogenetic analysis of synaptic transmission in the central nervous system of the nematode Caenorhabditis elegans.
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DOI:
10.1038/ncomms1304
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发表时间:
2011
影响因子:
16.6
通讯作者:
Lockery, Shawn R.
中科院分区:
文献类型:
--
作者:
Lindsay, Theodore H.;Thiele, Tod R.;Lockery, Shawn R.
A reliable method for recording evoked synaptic events in identified neurons in C. elegans would greatly accelerate our understanding of its nervous system at the molecular, cellular, and network levels. Here we describe a method for recording synaptic currents and potentials from identified neurons in nearly intact worms. Dissection and exposure of postsynaptic neurons is facilitated by microfabricated agar substrates and ChannelRhodopsin-2 is used to stimulate presynaptic neurons. We used the method to analyze functional connectivity between a polymodal nociceptor and a command neuron that initiates a stochastic escape behavior. We find that escape probability mirrors the time course of synaptic current in the command neuron. Moreover, synaptic input increases smoothly as stimulus strength is increased, suggesting that the overall input-output function of the connection is graded. We propose a model in which the energetic cost of escape behaviors in C. elegans is tuned to the intensity of the threat.
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通讯作者:
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DOI:
10.1073/pnas.0409009101
发表时间:
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影响因子:
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作者:
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通讯作者:
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