Does endogenous 5-HT mediate spontaneous rhythmic activity in chemoreceptor clusters of rat carotid body?


Spontaneous voltage fluctuations often occurred during perforated-patch recordings from clustered rat carotid body (CB) chemoreceptors in vitro. This activity sometimes appeared as rhythmic-like spikes, when cluster size exceeded approximately 20 cells. Spike discharge could be augmented or induced by hypoxia or 5-HT (2-10 microM) application, and inhibited… (More)


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