NDLI: Modulation of Cl-, K+, and nonselective cation conductances by taurine in olfactory receptor neurons of the mudpuppy Necturus maculosus

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Modulation of Cl-, K+, and nonselective cation conductances by taurine in olfactory receptor neurons of the mudpuppy Necturus maculosus

Content Provider	Semantic Scholar
Author	Dubin, Adrienne E. Dionne, Vincent E.
Copyright Year	1993
Abstract	Odors are transduced by processes that modulate the membrane conductance of olfactory receptor neurons. Olfactory neurons from the aquatic salamander, Necturus maculosus, were acutely isolated without enzymes and studied with a resistive whole-cell method to minimize loss of soluble intracellular constituents. 55 of 224 neurons responded to the test compound taurine at concentrations between 10 nM and 100 microM. Four different conductance changes were elicited by taurine: an increased Cl- conductance (33%), an increased nonselective cation conductance (15%), a decreased Cl- conductance (15%), and a decreased K+ conductance (15%); in addition, responses too small to be characterized were elicited in some neurons. In most cases, taurine appeared to modulate only a single conductance in any particular cell. Modulation of each conductance was dose dependent, and each response ran down quickly in the normal whole-cell mode, presumably due to washout of a diffusible component in the transduction pathway. Modulation of taurine-sensitive conductances caused either inhibitory or excitatory responses. A similar diversity of responses in vivo would produce a complex pattern of electrical activity that could encode the identity and characteristics of an odor.
Starting Page	469
Ending Page	485
Page Count	17
File Format	PDF HTM / HTML
PubMed reference number	7685047
Volume Number	101
Journal	The Journal of general physiology
Alternate Webpage(s)	http://jgp.rupress.org/content/jgp/101/4/469.full.pdf
Language	English
Access Restriction	Open
Subject Keyword	Cations Chloride Ion Intermediate-Conductance Calcium-Activated Potassium Channels Necturus maculosus Odors Olfactory Receptor Cells Receptors, Odorant Taurine Tissue membrane arsenic cation transduction
Content Type	Text
Resource Type	Article

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