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Related Experiment Videos

The modulation of sperm function by fertilization promoting peptide.

L R Fraser1

  • 1Anatomy and Human Biology, King's College London, UK.

Human Reproduction (Oxford, England)
|March 26, 1999
PubMed
Summary

Fertilization promoting peptide (FPP) enhances sperm capacitation and fertility in vitro. FPP and adenosine work together to improve sperm function, potentially aiding human fertility.

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Area of Science:

  • Reproductive Biology
  • Molecular Endocrinology
  • Sperm Physiology

Background:

  • Fertilization promoting peptide (FPP) is a prostate-secreted peptide found in seminal plasma.
  • FPP stimulates sperm capacitation and enhances fertilizing ability in vitro.
  • FPP also inhibits spontaneous acrosome loss in capacitated sperm, maintaining their fertilizing potential.

Purpose of the Study:

  • To investigate the role of FPP and adenosine in sperm function.
  • To explore the mechanism of action of FPP and its interaction with adenosine.
  • To identify potential receptors for FPP and their implications for human fertility.

Main Methods:

  • Cytological assessment of sperm capacitation.
  • In vitro fertilization assays.
  • Analysis of adenylate cyclase/cAMP signaling pathway.
  • Identification and characterization of FPP-related peptides and potential receptors.

Main Results:

  • FPP addition stimulates capacitation in uncapacitated sperm and inhibits acrosome loss in capacitated sperm.
  • Adenosine elicits similar responses to FPP, and their combined use is more effective.
  • Gln-FPP competitively inhibits FPP activity, suggesting a regulatory role.
  • TCP-11 protein is a potential receptor for FPP, with a human homologue suggesting relevance to human fertility.

Conclusions:

  • FPP and adenosine modulate sperm function via the adenylate cyclase/cAMP pathway.
  • FPP and its receptor TCP-11 may play a significant role in human fertility and subfertility.
  • In vitro FPP use could potentially reduce issues related to delayed fertilization and subsequent embryonic development.

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