Key result
Oligomycin initially stimulated carotid chemoreceptor activity but subsequently abolished responses to changes in PaO2, cyanide, antimycin A, or FCCP, while responses to nicotine remained intact.
Population
20 cats that were anesthetized, paralyzed, and artificially ventilated
Comparison
Oligomycin administered by close intra-arterial… vs Baseline responses prior to oligomycin…
Design
Preclinical
Authors
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Animal data implicate oxidative phosphorylation in carotid chemoreception; extends mechanistic understanding but leaves open human translation.
Intact oxidative phosphorylation is required for O2 chemoreception in the carotid body, separating hypoxic stimulation from nicotine stimulation.
Mulligan et al. (1981) studied this question. Oligomycin was evaluated on Responses of single or a few chemoreceptor afferents to changes in arterial O2 tension (PaO2). Oligomycin initially stimulated carotid chemoreceptor activity but subsequently abolished responses to changes in PaO2, cyanide, antimycin A, or FCCP, while responses to nicotine remained intact.
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