Ability of ovarian steroids to regulate the expression of the fibroblast growth factor family in fibroblasts derived from uterine endometrium

Uterine endometrial neovascularization during the menstrual cycle is regulated by a basic fibroblast growth factor (FGF) in the endometrium, consisting of endothelial and stromal cells. Acidic FGF (FGF-1), basic FGF (FGF-2) and hst-1 (FGF-4) proteins also possess angiogenic potency in vivo. Therefore, it is important to improve our understanding of the role of stromal cells in FGF supply for endometrial neovascularization. In this study, we determined FGF-1,-2, and -4 mRNA and FGF-2 by reverse transcription-polymerase chain reaction-Southern blot analysis, and enzyme-linked immunosorbent assay, respectively, in fibroblasts derived from uterine endometria as a substitute for stromal cells. Experimental results indicate that estradiol significantly increases the levels of intracellular and secreted FGF-2 and its mRNA expression in the FGF family in the fibroblasts. Moreover, progesterone reduces the estradiol-induced increase. Therefore, endometrial neovascularization might be partially regulated by stroma-derived FGF-2 under the influence of sex steroids through a paracrine cell-to-cell interaction. Similar content being viewed by others

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