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Related Experiment Videos

Dynamic changes in Sertoli cell processes invading spermatid cytoplasm during mouse spermiogenesis.

Y Sakai1, T Nakamoto, S Yamashina

  • 1Department of Anatomy, School of Medicine, Kitasato University, Kanagawa, Japan.

The Anatomical Record
|January 1, 1988
PubMed
Summary

Sertoli cell processes undergo significant three-dimensional changes during mouse spermiogenesis, forming a complex canal system that aids spermatid maturation. These intricate structures, including thin tubules and mixed bodies, are crucial for sperm development.

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Area of Science:

  • Reproductive Biology
  • Cell Biology
  • Developmental Biology

Background:

  • Spermiogenesis involves complex cellular interactions between Sertoli cells and developing spermatids.
  • The precise three-dimensional ultrastructure of Sertoli cell processes during spermiogenesis remains incompletely understood.

Purpose of the Study:

  • To elucidate the three-dimensional ultrastructural alterations of Sertoli cell processes invading spermatids during mouse spermiogenesis.
  • To characterize the formation and modification of the canal complex and associated structures.

Main Methods:

  • Utilized thick sections stained by ATPase cytochemistry.
  • Employed scanning electron microscopy for three-dimensional ultrastructural analysis.

Main Results:

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  • Sertoli cell processes invade spermatid cytoplasm during the acrosomal phase, undergoing significant changes in the maturation phase.
  • A complex canal system, termed the canal complex, forms by step 15, with regional modifications observed.
  • In late maturation stages, Sertoli cell processes form thin tubules around endoplasmic reticulum aggregates, creating structures identified as mixed bodies.

Conclusions:

  • Sertoli cell processes exhibit dynamic three-dimensional remodeling during spermiogenesis.
  • The formation of the canal complex and mixed bodies represents a critical ultrastructural adaptation for efficient spermatid development.
  • These invading processes remain continuous with the Sertoli cell body throughout formation.