PMID: 8944830Nov 1, 1996Paper

17 beta-estradiol inhibits proliferation and migration of human vascular smooth muscle cells: similar effects in cells from postmenopausal females and in males

Cardiovascular Research
D Dai-DoT F Lüscher

Abstract

Cardiovascular disease is rare in premenopausal women, but increases after the menopause when hormone replacement therapy reduces coronary events. Vascular smooth muscle cell (SMC) proliferation and migration occur in atherosclerosis, restenosis and venous graft disease. We studied the effects of 17 beta-estradiol on SMC proliferation and migration. SMC were cultured from saphenous veins of postmenopausal women and age-matched men. Cell growth was determined by 3H-thymidine incorporation and cell counting. Migration of SMC was assessed in 4-well chambers. SMC were seeded in one corner and PDGF-BB in filter paper glued onto the opposite wall. PDGF-BB (5 ng/ml for 24 h) similarly stimulated 3H-thymidine incorporation in female (511 +/- 57%; n = 8) and male (528 +/- 62%; n = 12) SMC. This was reduced by 17 beta-estradiol (10(-8)-10(-6) M; female 313 +/- 52%; male 337 +/- 54%; P < 0.05). PDGF-BB increased the number of SMC (P < 0.0001 at 10 days) obtained from females (153 +/- 3%; n = 5) and males (150 +/- 4%; n = 5), which was inhibited by 17 beta-estradiol (10(-6) M; female 134 +/- 7%; male 128 +/- 5%; P < 0.05). Similar results were obtained with basic fibroblast growth factor. In contrast to 17 beta-estradiol, another steroid (...Continue Reading

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