Key result
Capsaicin administration reduced the reflex pressor and renal sympathetic nerve response to mechanoreflex activation in healthy male rats, but not female rats, in vivo.
Why the study?
Evidence in isolated sensory neurons showed capsaicin-induced TRPV1 stimulation attenuates mechanosensitivity, but in vivo effects on mechanoreflex activation remained unknown.
Does capsaicin administration reduce the reflex pressor and renal sympathetic nerve response to mechanoreflex activation in healthy rats?
Does capsaicin administration reduce the reflex pressor and renal sympathetic nerve response to mechanoreflex activation in healthy rats?
Capsaicin administration attenuates the mechanoreflex in male but not female rats, highlighting a sex-dependent physiological response that may have implications for chronic diseases.
Hypothesis-generating for sex-specific mechanoreflex modulation in chronic disease; requires human studies before clinical consideration.
Recent evidence in isolated sensory neurons indicates that capsaicin-induced stimulation of TRPV1 attenuates mechanosensitivity. Here we demonstrate for the first time that capsaicin exposure/administration reduces the reflex pressor and renal sympathetic nerve response to mechanoreflex activation in male rats, but not female rats, in vivo. Our data may carry important clinical implications for chronic diseases which have been linked to an exaggerated mechanoreflex, at least in males.
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Butenas et al. (2023) studied healthy rats. Capsaicin was evaluated on Reflex pressor and renal sympathetic nerve response to mechanoreflex activation. Capsaicin administration reduced the reflex pressor and renal sympathetic nerve response to mechanoreflex activation in healthy male rats, but not female rats, in vivo.
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