Age moderates the short-term effects of transdermal 17beta-estradiol on endothelium-dependent vascular function in postmenopausal women.

Journal Article

OBJECTIVE: We evaluated age and coronary heart disease (CHD) as potential moderators of the effects of 17beta-estradiol on vascular endothelial function in postmenopausal women. METHODS AND RESULTS: In a double-blind crossover design, 100 postmenopausal women aged 50 to 80 years were randomized to each of 3 transdermal patches, releasing 17beta-estradiol (0.05 mg/d), 17beta-estradiol (0.05 mg/d) + norethindrone acetate (NETA, 0.14 mg/d), and placebo. Flow-mediated dilation (FMD) and response to 400 microg sublingual glyceryl trinitrate (GTN-D) were assessed approximately 18 hours after patch placement. Age, but not CHD, moderated the FMD response to treatment (P=0.01). For women in their fifties, the estradiol patch was associated with improved FMD (7.69+/-4.79%) compared with placebo (4.81+/-5.97%, P<0.05), but the estradiol+norethindrone patch response (5.81+/-4.85%) was not significantly different from placebo. Women in their sixties and seventies showed no alterations in FMD response to either active patch. GTN-D response declined with advancing age (P<0.01), with women in their seventies exhibiting blunted GTN-D response compared with younger women. CONCLUSIONS: The cardiovascular benefits of natural estrogen supplementation on vascular endothelial function may be dependent on postmenopausal age, with improved vascular function evident only in the early postmenopausal years. Short-term FMD response to estradiol might help stratify individual differences in risks versus benefits of HRT.

Full Text

Duke Authors

Cited Authors

  • Sherwood, A; Bower, JK; McFetridge-Durdle, J; Blumenthal, JA; Newby, LK; Hinderliter, AL

Published Date

  • August 2007

Published In

Volume / Issue

  • 27 / 8

Start / End Page

  • 1782 - 1787

PubMed ID

  • 17541023

Electronic International Standard Serial Number (EISSN)

  • 1524-4636

Digital Object Identifier (DOI)

  • 10.1161/ATVBAHA.107.145383

Language

  • eng

Conference Location

  • United States