Cytochemical Localization of Adenylate Cyclase Activity in Rat Olfactory Cells

Overview

Journal Histochem J

Specialty Biochemistry

Date 1991 Feb 1

PMID 1655680

Citations 7

Authors

N Asanuma

H Nomura

Affiliations

Soon will be listed here.

Abstract

Adenylate cyclase activity was demonstrated in the cilia, dendritic knob and axon of rat olfactory cells by using a strontium-based cytochemical method. The activity in the cilia and the dendritic knob was enhanced by non-hydrolyzable GTP (guanosine triphosphate) analogues and forskolin, and inhibited by Ca2+, all in agreement with biochemical reports of the odorant-sensitive adenylate cyclase. The results support the hypothesis of cyclic AMP working as a second messenger in olfactory transduction and imply that the transduction sites exist not only in the olfactory cilia but also in the dendritic knob. Enzymatic activity was also observed in the olfactory dendritic shaft by treating the tissue with 0.0002% Triton X-100, although the properties and role of the enzyme in this region are uncertain. The detergent inhibited the enzymatic activity in the cilia and the dendritic knob.

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