Basic fibroblast growth factor in ovulatory cycle and postmenopausal human endometrium.

Area of Science:

• Endocrinology
• Molecular Biology
• Reproductive Science

Background:

• Basic fibroblast growth factor (bFGF) is a key signaling molecule involved in cell growth and tissue repair.
• The presence and role of bFGF in human endometrium, particularly after menopause, require further investigation.

Purpose of the Study:

• To characterize the presence and levels of basic fibroblast growth factor (bFGF) in human endometrial tissue.
• To investigate the changes in endometrial bFGF levels during the menstrual cycle and after menopause.

Main Methods:

• Human endometrial biopsies were analyzed using immunological and biological assays.
• Characterization of the bFGF-like molecule involved assessing molecular weight, heparin affinity, and biological activity in endothelial cells.

Main Results:

• An immunoreactive bFGF-like molecule was detected at high levels in both ovulatory and postmenopausal endometrium.
• Endometrial bFGF levels did not change during the menstrual cycle but significantly increased post-menopause.
• Lower levels of acidic FGF-like activity were found in ovulatory endometrium, with no significant postmenopausal increase.

Conclusions:

• This study provides the first characterization of a polypeptide growth factor, bFGF, in human endometrium.
• Endometrial bFGF levels are significantly elevated after menopause, suggesting a potential role in postmenopausal endometrial physiology.
• The findings highlight bFGF as a relevant factor in human endometrial tissue throughout different reproductive stages.