Medroxyprogesterone acetate and dihydrotestosterone induce coronary hyperreactivity in intact male rhesus monkeys

Rajesh G. Mishra, R. Kent Hermsmeyer, Koichi Miyagawa, Philip Sarrel, Barry Uchida, Frank Z. Stanczyk, Kenneth A. Burry, D. Roger Illingworth, Frank J. Nordt

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Coronary hyperreactivity (CH), characterized by persistent severe vasoconstrictions in response to vasoconstrictor challenge, is oppositely influenced by progesterone (P) and medroxyprogesterone acetate (MPA) treatment in surgically menopausal primates. In this study we tested whether multiweek MPA or dihydrotestosterone (DHT) exposure induced CH in intact male rhesus monkeys. Coronary angiographic experiments with intracoronary serotonin and the thromboxane A2 analog U46619 stimulated brief vasoconstriction (for 1-3 min) in large epicardial coronaries in untreated male monkeys. In contrast, MPA- and DHT-treated monkeys displayed long-duration constrictions (>5 min), with significantly greater reductions in the minimal diameters of epicardial coronaries. Immunocytochemistry demonstrated androgen receptors (AR) and P receptors in aorta and coronary arteries, and immunocytochemistry and Western blotting showed AR and P receptors in rhesus coronary vascular muscle cells. In vivo, MPA or DHT increased thromboxane prostanoid (TP) receptor expression in the aorta. In vitro, MPA or DHT increased, whereas P did not change, TP receptor expression in primary coronary vascular muscle cell. This MPA- or DHT-mediated increase in TP receptor expression was attenuated by the AR antagonist flutamide. MPA or DHT induction of CH in intact adult male primates, hypothesized to occur via androgenic up-regulation of vascular muscle TP receptor expression, could predispose to CH-mediated myocardial ischemia.

Original languageEnglish (US)
Pages (from-to)3706-3714
Number of pages9
JournalJournal of Clinical Endocrinology and Metabolism
Volume90
Issue number6
DOIs
StatePublished - Jun 2005

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Medroxyprogesterone Acetate
Dihydrotestosterone
Macaca mulatta
Thromboxane Receptors
Thromboxanes
Prostaglandins
Blood Vessels
Muscle
Androgen Receptors
Vasoconstriction
Muscle Cells
Primates
Haplorhini
Aorta
Androgen Receptor Antagonists
Immunohistochemistry
Cells
Flutamide
15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid
Thromboxane A2

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology, Diabetes and Metabolism

Cite this

Medroxyprogesterone acetate and dihydrotestosterone induce coronary hyperreactivity in intact male rhesus monkeys. / Mishra, Rajesh G.; Hermsmeyer, R. Kent; Miyagawa, Koichi; Sarrel, Philip; Uchida, Barry; Stanczyk, Frank Z.; Burry, Kenneth A.; Illingworth, D. Roger; Nordt, Frank J.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 90, No. 6, 06.2005, p. 3706-3714.

Research output: Contribution to journalArticle

Mishra, RG, Hermsmeyer, RK, Miyagawa, K, Sarrel, P, Uchida, B, Stanczyk, FZ, Burry, KA, Illingworth, DR & Nordt, FJ 2005, 'Medroxyprogesterone acetate and dihydrotestosterone induce coronary hyperreactivity in intact male rhesus monkeys', Journal of Clinical Endocrinology and Metabolism, vol. 90, no. 6, pp. 3706-3714. https://doi.org/10.1210/jc.2004-1557
Mishra, Rajesh G. ; Hermsmeyer, R. Kent ; Miyagawa, Koichi ; Sarrel, Philip ; Uchida, Barry ; Stanczyk, Frank Z. ; Burry, Kenneth A. ; Illingworth, D. Roger ; Nordt, Frank J. / Medroxyprogesterone acetate and dihydrotestosterone induce coronary hyperreactivity in intact male rhesus monkeys. In: Journal of Clinical Endocrinology and Metabolism. 2005 ; Vol. 90, No. 6. pp. 3706-3714.
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