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Human Reproduction, Vol 13, 1449-1454, Copyright © 1998 by Oxford University Press

ARTICLES

The effect of oestrogen on intimal hyperplasia in cultured human ovarian veins

A Akkad and F Al-Azzawi
Gynaecology Research Group, Department of Obstetrics and Gynaecology, Leicester Royal Infirmary, UK.

The beneficial effect of oestrogen on blood vessels may include modulation of vascular response to injury. In this experiment we set out to develop an in-vitro model, using all human materials, for the study of vascular changes in culture, and their response to oestrogen treatment. Human ovarian vein segments were obtained from 15 hysterectomy specimens, and cultured with and without the addition of 17beta-oestradiol. Paired control veins were cultured with the inert 17alpha-oestradiol. The veins were stained with anti-alpha-smooth muscle actin and Miller's elastin, and intimal thickness measured. Cultured veins developed a significant degree of intimal thickening [15.7 versus 8.25 microm in fresh veins, 95% confidence intervals (CI) 13.6, 17.8 and 6.3, 10.2 respectively; P = 0.0001]. The addition of 17beta-oestradiol, but not 17alpha-oestradiol, led to a significant reduction in intimal hyperplasia (intimal thickness 8.85 microm; 95% CI 6.9, 10.8; P = 0.008). The mean number of nuclei per high-power field was also significantly lower in the intima of oestrogen-treated compared to untreated veins (11.6; 95% CI 9.9, 13.26 versus 14.05; 95% CI 12.5, 15.6; P = 0.001). Our data suggest that intimal hyperplasia in cultured ovarian veins is effectively reduced by oestrogen.
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