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Journal of Neuroscience, Vol 14, 3304-3309, Copyright © 1994 by Society for Neuroscience

ARTICLE

Single odors differentially stimulate dual second messenger pathways in lobster olfactory receptor cells

I Boekhoff, WC Michel, H Breer and BW Ache
Institute of Zoophysiology, University of Stuttgart-Hohenheim, Germany.

Quench-flow measurements are used to determine the subsecond kinetics of odor-induced changes in second messenger concentrations in lobster olfactory receptor neurons. Individual odors transiently and differentially increase the production of both adenosine cAMP and inositol 1,4,5-trisphosphate (IP3) within 50 msec of odor stimulation. The ability of two different odors to stimulate cAMP and IP3 correlates with the odors' ability to excite and inhibit receptor cells physiologically. These results strengthen the proposition, heretofore based largely on evidence from cultured cells, that dual second messenger pathways mediate excitatory and inhibitory input to lobster olfactory receptor cells.


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