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Related Experiment Videos

Prospects for spermatogenesis in vitro.

J E Parks1, D R Lee, S Huang

  • 1Gamete Physiology, Department of Animal Science, Cornell University, 201 Morrison Hall, Ithaca, NY 14853, USA. jep5@cornell.edu

Theriogenology
|December 25, 2002
PubMed
Summary
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Achieving complete in vitro spermatogenesis remains challenging. This study shows progress by demonstrating meiosis in cultured bull testis cells, a step toward male infertility treatments.

Area of Science:

  • Reproductive Biology
  • Developmental Biology
  • Cell Biology

Background:

  • Significant advancements in reproductive technologies, including spermatogonial transplantation.
  • Complete in vitro recapitulation of spermatogenesis, including meiosis, remains an elusive goal.
  • Germ cell-Sertoli cell association is crucial for in vitro germ cell survival.

Purpose of the Study:

  • To investigate the potential for in vitro spermatogenesis (IVS) in bovine testis cells.
  • To assess the occurrence of meiosis and early differentiation markers in cultured cells.
  • To evaluate the viability of in vitro-produced spermatids for potential use in assisted reproduction.

Main Methods:

  • Culture of neonatal bull testis cells encapsulated in alginate.

Related Experiment Videos

  • Monitoring gene expression of spermatid-specific markers (protamine, transition protein 1).
  • Assessment of acrosome development and round spermatid injection (ROSI) into oocytes.

    • Main Results:

    • Expression of spermatid-specific genes observed after 10 weeks of culture, indicating meiosis.
    • Sparse identifiable germ cells and some acrosome development observed.
    • ROSI resulted in 50% diploid and 37% Y-chromosome positive blastocysts.

    Conclusions:

    • Cultured bovine testis cells show potential for in vitro meiosis and spermatid differentiation.
    • Improved culture conditions are essential for advancing in vitro spermatogenesis technology.
    • Further research is needed to optimize protocols for efficient male germ cell production in vitro.