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Am J Physiol Heart Circ Physiol 283: H1997-H2003, 2002. First published July 18, 2002; doi:10.1152/ajpheart.01054.2001
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Vol. 283, Issue 5, H1997-H2003, November 2002

Gender differences in cardiac ACE expression are normalized in androgen-deprived male mice

Judy R. Freshour, Sharon E. Chase, and Karen L. Vikstrom

Department of Pharmacology, State University of New York Upstate Medical University, Syracuse, New York 13210

Gender differences have been described in the response of the cardiovascular system to a number of stimuli, including ventricular remodeling in response to pressure overload, but the molecular basis for these differences remains unclear. Because gender differences in the cardiac expression of angiotensin-converting enzyme (ACE) could contribute to differences in myocardial remodeling, we examined myocardial ACE expression in age-matched male and female mice. Ventricular ACE was more abundant in male than female mice at both mRNA and protein levels. These differences became apparent once the mice reached sexual maturity and became more pronounced with increasing age. The influence of mouse gonadal status on ventricular ACE expression was also examined. Oophorectomy slightly increased ACE levels in female mice, whereas ventricular ACE levels were substantially decreased in androgen-deprived males. The antithetical changes in ventricular ACE abundance seen in agonadal male and female mice suggest that testosterone as well as estrogen may play a role in regulating ACE expression in the heart.

angiotensin; angiotensin-converting enzyme; gene expression; estrogen; testosterone


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