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Membrane-bound cell surface peptidases in reproductive organs.

H Fujiwara1, K Imai, T Inoue

  • 1Department of Obstetrics and Gynecology, Faculty of Medicine, Kyoto University, Japan.

Endocrine Journal
|July 30, 1999
PubMed
Summary
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Membrane-bound peptidases regulate ovarian and endometrial cell functions. Inhibiting aminopeptidase activity impacts follicular growth and decidualization, suggesting potential therapeutic uses for reproductive disorders.

Area of Science:

  • Reproductive Biology
  • Enzymology
  • Cell Biology

Background:

  • Membrane-bound cell surface peptidases are extracellular enzymes that regulate local peptide concentrations.
  • These peptidases are crucial for various reproductive processes, including follicular growth, ovulation, and embryo implantation.
  • Peptides play vital autocrine and paracrine roles in ovarian and endometrial functions.

Purpose of the Study:

  • To investigate the differential expression of key membrane-bound peptidases in human ovarian and endometrial cells.
  • To explore the functional significance of these peptidases in reproductive processes.
  • To assess the impact of aminopeptidase inhibition on reproductive functions.

Main Methods:

  • Differential expression analysis of peptidases (aminopeptidase-N, dipeptidyl peptidases IV, carboxypeptidase-M, neutral endopeptidase, endothelin converting enzyme-1) in ovarian and endometrial cells.

Related Experiment Videos

  • Inhibition of aminopeptidase activity using bestatin.
  • In vitro and in vivo studies assessing effects on follicular growth, steroidogenesis, and decidualization.

    • Main Results:

    • Significant differences in peptidase expression were observed across ovarian granulosa, theca interna, luteal cells, and endometrial epithelial and stromal cells.
    • Bestatin-mediated inhibition of aminopeptidase activity impaired murine follicular growth and porcine ovarian steroidogenesis.
    • Inhibition also affected progesterone-induced decidualization of human endometrial stromal cells.

    Conclusions:

    • Membrane-bound peptidases are critical regulators of ovarian and endometrial cell function and differentiation.
    • Targeting these peptidases, particularly aminopeptidases, holds promise for treating reproductive disorders.
    • Further research will elucidate the precise physiological roles of these enzymes and their clinical applications.