Expression of Vascular Endothelial Growth Factor in Human Ovary.

Roh, Jae Sook; Kang, Ji Yeon; Ji, Ill Woon; Jeong, Eun Hwan; Ahn, Chi Seok; Kim, Hak Soon

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Original Article

Korean Journal of Obstetrics & Gynecology 1998;41(12):2969-2973.
Published online January 1, 2001.

Expression of Vascular Endothelial Growth Factor in Human Ovary.

Jae Sook Roh, Ji Yeon Kang, Ill Woon Ji, Eun Hwan Jeong, Chi Seok Ahn, Hak Soon Kim

Abstract

OBJECTIVE
The ovarian cycle is characterized by repeating patterns of cellular proliferation and differentiation that accompany follicular development and the formation and regression of the corpus luteum (CL). That angiogenesis may play an important role in this process. Angiogenesis is supposed to be regulated by vascular endothelial growth factor (VEGF). The goal of the present investigation, therefore, was to determine whether the expression of VEGF was changed in the normally cycling human ovary. We also investigated VEGF expression in the regressed CL (ie, nonfunctiong CL) of normal term pregnancy to define the association with steroidogenic activity. To our knowledge there is no report available on VEGF expression in the CL of term pregnancy. METHODS: We assessed VEGF expression in ovaries obtained from, 26-42 yr of age, and from patients undergoing hysterectomy and salpingo-oophorectomy for nonendocrinological or nonovarian disorders. Tissue samples from premenopausal women included specimens from follicular (n=4) and luteal (n 4) phases. In addition, we studied ovarian specimens from pregnant women (n=3). Immunohistochemical analysis for VEGF was performed using a rabbit polyclonal antibody directed against human VEGF. RESULTS: These data demonstrate a development-related VEGF expression in the follicle and indirectly show that VEGF expression may be up to the existence of LH-receptor. And also, VEGF was overexpressed in the regressed CL of pregnant women compared with the functioning CL of nonpregnant cycles CONCLUSION: This study suggests that the intensity of VEGF expression is not correlated with steroidogenic activity, although both of them are stimulated by LH.

Key Words: VEGF, Ovarian follicle, Corpus luteum

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