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Patchy basement membrane of rat Leydig cells shown by ultrastructural immunolabeling

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Summary

Rat testes were examined by conventional and immunolabeling transmission electron microscopy. Ultrastructurally identifiable continuous basement membranes were found around seminiferous tubules and the interstitial capillaries. Patches of basement membrane were, additionally, found on free surfaces of Leydig cells, between two Leydig cells, and in macrophage-Leydig cell contact sites. The ultrastructural findings were confirmed by immunocytochemical localization of laminin and collagen type IV in the same areas. A close association between the capillary basement membranes and the surfaces of perivascular Leydig cells was also observed. The possible basement membrane-mediated interactions of Leydig cells with other testicular structures, together with the novel bioactive products and regulators of Leydig cells, support the role of these cells as exceptionally complex regulatory centers of testicular functions.

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Authors and Affiliations

  1. Department of Anatomy, University of Turku, Kiinamyllynkatu 10, SF-20520, Turku, Finland

    T. Kuopio

  2. Laboratory of Electron Microscopy, University of Turku, Turku, Finland

    L. J. Pelliniemi

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  1. T. Kuopio
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  2. L. J. Pelliniemi
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Kuopio, T., Pelliniemi, L.J. Patchy basement membrane of rat Leydig cells shown by ultrastructural immunolabeling. Cell Tissue Res. 256, 45–51 (1989). https://doi.org/10.1007/BF00224717

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