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Related Experiment Videos

Globozoospermia revisited.

A H D M Dam1, I Feenstra, J R Westphal

  • 1Department of Obstetrics and Gynaecology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.

Human Reproduction Update
|September 30, 2006
PubMed
Summary
This summary is machine-generated.

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Globozoospermia, a rare cause of male infertility, involves 100% round-headed sperm lacking acrosomes. Genetic factors are suspected, impacting spermiogenesis and potentially leading to low fertilization rates in treatments like ICSI.

Area of Science:

  • Reproductive Biology
  • Human Genetics
  • Infertility Research

Background:

  • Globozoospermia is a rare male infertility disorder characterized by 100% round-headed spermatozoa lacking acrosomes.
  • The distinction between total and partial globozoospermia and their relationship remains unclear.
  • Affected males experience reduced fertility or infertility, with no other associated physical characteristics.

Purpose of the Study:

  • To investigate the characteristics and potential pathogenesis of globozoospermia.
  • To explore the genetic basis of globozoospermia.
  • To understand the implications for assisted reproductive technologies.

Main Methods:

  • Analysis of spermatozoal morphology, including acrosome presence and chromatin structure.

Related Experiment Videos

  • Assessment of DNA fragmentation and cytogenetic composition in affected sperm.
  • Review of clinical outcomes following intracytoplasmic sperm injection (ICSI).
  • Examination of relevant knockout mouse models and familial data.

    • Main Results:

    • Globozoospermic sperm exhibit absent or malformed acrosomes, disturbed chromatin compaction, and sometimes increased DNA fragmentation.
    • Some cases show an increased aneuploidy rate, but ICSI pregnancies have not shown increased spontaneous abortions or congenital defects.
    • Knockout mouse models and affected siblings suggest a genetic origin for globozoospermia.

    Conclusions:

    • The pathogenesis of globozoospermia likely involves defects in acrosome formation and sperm head elongation during spermiogenesis.
    • Globozoospermia is a strong candidate for genetic analysis due to its suspected genetic origin.
    • Further research is crucial to fully elucidate the pathogenesis of human globozoospermia and its impact on spermatogenesis.