Document Detail

Lamellar germ cell processes: structures for possible interaction between germs cells and Sertoli cells during spermatogonial differentiation and early meiotic prophase.
MedLine Citation:
PMID:  6724723     Owner:  NLM     Status:  MEDLINE    
The recent finding of a stage-dependent topographical relationship of basally located germ cells to Sertoli-Sertoli interspaces in the rat testis ( Ulvik 1983a ) has suggested a focal interaction between Sertoli cells and early germ cells at the sites where 2 Sertoli cells meet over a basal germ cell. Focal, stage-dependent interaction between Sertoli cells and germ cells may require specializations of the germ cell membrane. Therefore, in the present work the surface of spermatogonia and spermatocytes has been studied under the electron microscope throughout the cycle of the seminiferous epithelium. Lamellar processes, 1-3 micron long, were found to emerge from germ cells and protrude into the spaces between the overlying Sertoli cells. The processes appeared on differentiating type A spermatogonia after stage VI, on intermediate and type B spermatogonia, and on leptotene, zygotene, and early pachytene spermatocytes; however, they were not found on type A spermatogonia prior to stage VII or on preleptotene spermatocytes at stage VII. The lamellar processes are thus stage-specific and may be sites of focal interaction with the Sertoli cells. Since the cell processes always protrude into the Sertoli-Sertoli interspaces this finding supports the hypothesis of focal, stage-dependent interaction between early germ cells and Sertoli cells via the narrow Sertoli-Sertoli interspaces.
N M Ulvik
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of andrology     Volume:  7     ISSN:  0105-6263     ISO Abbreviation:  Int. J. Androl.     Publication Date:  1984 Apr 
Date Detail:
Created Date:  1984-06-28     Completed Date:  1984-06-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8000141     Medline TA:  Int J Androl     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  129-41     Citation Subset:  IM    
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MeSH Terms
Cell Communication*
Cell Differentiation
Cell Membrane / ultrastructure
Microscopy, Electron
Sertoli Cells / ultrastructure*
Spermatocytes / ultrastructure*
Spermatogonia / ultrastructure*
Spermatozoa / ultrastructure*

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