What question did this study set out to answer?

To elucidate the developmental origin of round-headed spermatozoa by examining the presence and localization of acrosomal markers throughout spermiogenesis.

April 24, 2009Andrologia

On the Teratogenesis of Round-Headed Spermatozoa: Investigations with Antibodies Against Acrosin, an Intraacrosomally Located Acrosin-Inhibitor, and the Outer Acrosomal Membrane

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Authors

SFS. FLÖRKE-GERLOFF WKWalter KrauseSoft Imaging LLC (United States)ETEdda Töpfer‐PetersenUniversity of Veterinary Medicine Hannover, Foundation

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Implication

Immunohistochemical analysis demonstrates detachment and loss of acrosomal markers during spermiogenesis in an infertile male, indicating structural displacement causes round-headed spermatozoa.

Key Points

To elucidate the developmental origin of round-headed spermatozoa by examining the presence and localization of acrosomal markers throughout spermiogenesis.
Examined testicular tissue and ejaculated spermatozoa from fertile controls and an infertile patient with exclusively round-headed spermatozoa (N=1).
Performed immunohistochemical staining using specific antibodies against boar acrosin, an intraacrosomal acrosin inhibitor, and the outer acrosomal membrane, supplemented with gelatin substrate film assays.
Ejaculated round-headed spermatozoa exhibited complete absence of acrosin, acrosin inhibitor, and outer acrosomal membrane staining, contrasting with normal acrosomal cap staining in fertile spermatozoa.
Early round spermatids from the infertile patient initially displayed normal marker localization adjacent to the nuclear membrane.
During subsequent spermiogenesis, the nascent acrosomal structure failed to expand across the nucleus, detached into the cytoplasm, and was ultimately shed during cytoplasmic extrusion.

Cite This Study

FLÖRKE-GERLOFF et al. (2009) studied this question.

synapsesocial.com/papers/6a8bdef70c58d86fb4cae1d8 https://doi.org/10.1111/j.1439-0272.1985.tb00972.x

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Implication

Immunohistochemical analysis demonstrates detachment and loss of acrosomal markers during spermiogenesis in an infertile male, indicating structural displacement causes round-headed spermatozoa.

On the Teratogenesis of Round-Headed Spermatozoa: Investigations with Antibodies Against Acrosin, an Intraacrosomally Located Acrosin-Inhibitor, and the Outer Acrosomal Membrane

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Cite This Study

On the Teratogenesis of Round-Headed Spermatozoa: Investigations with Antibodies Against Acrosin, an Intraacrosomally Located Acrosin-Inhibitor, and the Outer Acrosomal Membrane

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