title: Acute improvement of peripheral endothelial function in postmenopausal women with coronary artery disease after single oral intake of 17beta-estradiol valerate.
abstract: Chronic estrogen supplementation is known to improve endothelial function in postmenopausal women. We studied the acute effect of a single dose of orally administered 17beta-estradiol valerate (E2) on the peripheral endothelial dependent and independent vasodilatation in postmenopausal women with coronary artery disease (CAD). 20 postmenopausal women (age: 64.9 (7.2) y, height: 1.61 (0.04) m. weight: 68.6 (10.6) kg) with angiographically confirmed CAD were randomly examined for flow-associated vasodilatation (= FAD%, a marker for endothelial dependent vasodilatation) and for glyceryltrinitrate (400 microg, p.o.) induced vasodilatation (= GTN%, representing endothelial independent vasodilatation) two hours after placebo controlled, randomized crossover intake of 4 mg E2 p.o. After placebo FAD% was impaired (3.5 (1.7)%) compared to historic controls. After the oral intake of 4 mg E2, FAD% improved to 5.0 (2.8)% (P=0.02). GTN% was not significantly influenced by the oral E2 (E2: 12.6 (5.7) v placebo: 11.2 (6.9)%, P=0.14). Endothelial dysfunction can partially be restored by a single oral dose of 4 mg E2. This indicates an acute vasoprotective effect of E2 beyond its genomic and lipid modifying actions. It remains to be investigated if estrogen might play a beneficial role in the acute treatment of symptomatic coronary artery disease such as angina pectoris or preinfarct syndrome.
authors.affiliation: Department of Internal Medicine, Knappschaftskrankenhaus, Ruhr-University Bochum, Germany. markus.enderle@ruhr-uni-bochum.de
authors.forename: M D
authors.initials: MD
authors.lastname: Enderle
authors.forename: R
authors.initials: R
authors.lastname: Sayer
authors.forename: B
authors.initials: B
authors.lastname: Balletshofer
authors.forename: C
authors.initials: C
authors.lastname: Meisner
authors.forename: A O
authors.initials: AO
authors.lastname: Mück
authors.forename: R
authors.initials: R
authors.lastname: Haasis
authors.forename: H U
authors.initials: HU
authors.lastname: Haering
authors.forename: M
authors.initials: M
authors.lastname: Pfohl
mesh_terms: D000368:Aged; D001794:Blood Pressure / Q000502:physiology; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000503:physiopathology; D004730:Endothelium, Vascular / Q000000981:diagnostic imaging / Q000503:physiopathology*; D004958:Estradiol / Q000031:analogs & derivatives* / Q000627:therapeutic use; D004966:Estrogens, Conjugated (USP) / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008875:Middle Aged; D017698:Postmenopause / Q000187:drug effects / Q000502:physiology*; D014463:Ultrasonography; D014664:Vasodilation / Q000187:drug effects / Q000502:physiology
chemical_list: D004966:Estrogens, Conjugated (USP); D004958:Estradiol