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Related Experiment Videos

C-kit receptor and its possible function in human spermatozoa.

Huai L Feng1, J I Sandlow, L J Zheng

  • 1Center for Human Reproduction, North Shore University Hospital, NYU School of Medicine, Manhasset, New York, USA.

Molecular Reproduction and Development
|October 30, 2004
PubMed
Summary

The c-kit receptor protein is present in human sperm and is released during capacitation and the acrosome reaction. Its presence may serve as a useful assay for sperm function in male infertility.

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Area of Science:

  • Reproductive Biology
  • Sperm Cell Biology
  • Oncogene Research

Background:

  • The c-kit proto-oncogene protein's role in mature human sperm is not well-defined.
  • Understanding c-kit's function is crucial for assessing sperm viability and male fertility.

Purpose of the Study:

  • To investigate the presence and function of the c-kit receptor protein in human sperm.
  • To explore the potential of c-kit as a biomarker for male infertility.

Main Methods:

  • Immunohistochemical (IHC) staining using a polyclonal antibody against c-kit peptide.
  • Electron microscopy (EM) studies with immunogold labeling.
  • Western blot analysis to detect the c-kit protein.

Main Results:

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  • C-kit protein was localized to the acrosomal region of fresh sperm, with reduced binding in acrosome-reacted sperm.
  • A 150 kDa c-kit protein was detected and found to be released during sperm capacitation and acrosome reaction.
  • Anti-c-kit antibody inhibited the acrosome reaction and increased sperm agglutination, without affecting motility.

Conclusions:

  • Mature human sperm possess the c-kit receptor protein, which is released during capacitation and/or acrosome reaction.
  • The c-kit receptor plays a role in regulating the acrosome reaction and sperm-egg interactions.
  • Assessing c-kit receptor levels could be a valuable diagnostic tool for male infertility.