Histological and Physiological Investigation of Channelrhodopsin-2 and Halorhodopsin in the Dorsal Cochlear Nucleus-中国期刊网

摘要 WehavedeliveredviralvectorscontainingeitherChop2fusedwithGFP,Channelrhodopsin-2(ChR2),orHalorhodopsin(HaloR)fusedwithmCherry(toformlightgatedcationchannelsorchloridepumps,respectively),intothedorsalcochlearnucleus(DCN).OnetoeighteenmonthslaterweexaminedtheCNandinferiorcolliculus(IC)forevidenceofvirallytransfectedcellsandprocesses.ProductionofChR2andHaloRwasobservedthroughouttheDCN.Rhodopsinlocalizationwithinneuronswasdetermined,withelongate,fusiformandgiantcellsidentifiedbasedonmorphologyandlocationwithintheDCN.ProductionofChR2andHaloRwasfoundatboththeinjectionsiteaswellasinregionsprojectingtoandfromtheDCN.LightdrivenneuronalactivityintheDCNwasdependentuponthewavelengthandintensityofthelight,withonlytheappropriatewavelengthresultinginactivationandhigherintensitylightresultinginmoreneuronalactivity.Transfectingcellsviaviraldeliveryofrhodopsinscanbeusefulasatracttracerandasaneuronalmarkertodelineatepathways.Inthefuturerhodopsindeliveryandactivationmaybedevelopedasanalternativetoelectricalstimulationofneurons.

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Histological and Physiological Investigation of Channelrhodopsin-2 and Halorhodopsin in the Dorsal Cochlear Nucleus

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Histological and Physiological Investigation of Channelrhodopsin-2 and Halorhodopsin in the Dorsal Cochlear Nucleus

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