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J Endocrinol Invest. 2002 May;25(5):455-8.

Testosterone acts as a coronary vasodilator by a calcium antagonistic action.

Author information

1
Department of Cardiology, Royal Hallamshire Hospital, Sheffield, UK.

Abstract

T acts as a vasodilator in vitro and in vivo. Supplemental T therapy in humans with angina improves symptoms and reduces objective measures of ischemia. In left anterior descending coronary arteries taken from adult male Wistar rats, T abolishes 100+/-4.2% of calcium-dependent contraction induced by potassium chloride, 82.3+/-6.1% of the mostly calcium-dependent contraction induced by prostaglandin-F-2-alpha, but only 45.3+/-3.4% of the contraction induced by phorbol-12,13-dibutyrate (PDBu) in the presence of extracellular calcium, and 54.5+/-4.5% of the contraction induced by PDBu in the absence of extracellular calcium. These findings suggest that T is primarily inhibiting the calcium-dependent elements of vascular contraction.

PMID:
12035943
DOI:
10.1007/BF03344037
[Indexed for MEDLINE]

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