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Morphometric studies on lipid inclusions in Sertoli cells during the spermatogenic cycle in the rat

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Summary

The volume and surface area of lipid inclusions often present in the cytoplasm of rat Sertoli cells was measured directly from semi-thin sections of perfusion-fixed testicular tissues using an image analyser linked to a light microscope. Sertoli cell nuclei were used as a reference for comparing any variations in the measured parameters of lipid inclusions during the rat spermatogenic cycle. Volume density of Sertoli cell lipid inclusions was assessed by morphometric analysis of Sertoli cells photographically reconstructed from electron micrographs. Maximum lipid content in Sertoli cells occurred during stages IX–XIV of the spermatogenic cycle, then declined at stages I–III and remained low from stages IV–VIII. The persistence and increase in number of many large Sertoli cell lipid inclusions beyond the stage where spermatid residual bodies are phagocytosed within the Sertoli cells (stage IX) suggests that the synthesis and lipolysis of Sertoli cell lipid inclusions represents an intrinsic functional cycle of the Sertoli cells. Stage-dependent variations in the lipid content of rat Sertoli cells offers morphological evidence that the metabolic duties of the Sertoli cells are synchronised with the spermatogenic cycle to provide local coordination of the proliferation and maturation of the germ cells.

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Authors and Affiliations

  1. Department of Anatomy, Monash University, Clayton, Victoria, Australia

    J. B. Kerr, R. A. Mayberry & D. C. Irby

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  1. J. B. Kerr
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  2. R. A. Mayberry
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  3. D. C. Irby
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Kerr, J.B., Mayberry, R.A. & Irby, D.C. Morphometric studies on lipid inclusions in Sertoli cells during the spermatogenic cycle in the rat. Cell Tissue Res. 236, 699–709 (1984). https://doi.org/10.1007/BF00217241

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