Summary
The effect of a single i.p. administration of ethane dimethanesulphonate (EDS) upon rat testicular histology was studied by light microscopy and morphometry up to 4 weeks after treatment. One day after injection the interstitial tissue exhibited degenerating Leydig cells, abundant pyknotic interstitial cells, deposition of cellular debris and extensive networks of fibrillar material. Macrophages contained greatly increased numbers of cytoplasmic inclusion bodies. From 3 to 7 days morphometric analysis showed that Leydig cells and cellular debris had disappeared from the interstitial tissue, leaving only macrophages, fibroblasts and lymphatic endothelial tissue. A very small number of new Leydig cells were seen on day 14, often located in peritubular or perivascular positions. Regeneration of foetal-like Leydig cells occurred by 4 weeks, their cytoplasm containing large lipid inclusions and, numerous Leydig cells were often observed closely applied to the walls of the seminiferous tubules. The observations suggest that, after experimental destruction and depletion of Leydig cells, an interstitial precursor cell, as yet unidentified, gives rise to a new Leydig cell population. EDS thus offers a valuable opportunity to study further the interactions between the seminiferous tubules and the interstitial tissue following the destruction and subsequent regeneration of the Leydig cells.
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Kerr, J.B., Donachie, K. & Rommerts, F.F.G. Selective destruction and regeneration of rat Leydig cells in vivo. Cell Tissue Res. 242, 145–156 (1985). https://doi.org/10.1007/BF00225571
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DOI: https://doi.org/10.1007/BF00225571