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Gender differences in regional cutaneous microcirculatory responses to capsaicin
W R Ferrell1, B B Wong, J C Lockhart
1Department of Medicine, Centre for Rheumatic Diseases, Glasgow G31 2ER, UK. w.ferrell@bio.gla.ac.uk
Fundamental & Clinical Pharmacology
|April 7, 2004
Summary
Men show greater vascular response to capsaicin than women, suggesting potential differences in neuropeptide release and skin perfusion. This may indicate subclinical Raynaud
Area of Science:
- Physiology
- Vascular Biology
- Neuroscience
Background:
- Capsaicin triggers neuropeptide release, influencing vascular responses.
- Gender-based differences in vascular reactivity are not fully understood.
Purpose of the Study:
- To compare vascular responsiveness to capsaicin between healthy males and females.
- To investigate potential gender-specific anomalies in capsaicin-sensitive vasodilation.
Main Methods:
- Non-invasive laser Doppler imaging to measure skin perfusion changes.
- Topical capsaicin application on the hand and shin.
- Assessment of endothelium-dependent and -independent vasodilation using iontophoresis.
Main Results:
- Males exhibited greater capsaicin-induced vasodilation on the hand compared to females.
- No significant gender differences in response were observed on the shin.
- Lower fingertip temperature in females correlated with reduced capsaicin response.
- Endothelium-dependent and -independent vasodilation mechanisms showed no gender differences.
Conclusions:
- A specific anomaly in capsaicin-sensitive vasodilator mechanisms exists in some individuals, particularly females.
- This anomaly may be linked to subclinical Raynaud's phenomenon.
- Findings highlight gender-specific vascular responses to capsaicin, independent of general endothelial function.