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Immunocytochemical localization of actin and tubulin in rat testis and spermatozoa
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AUMUELLER G.; SEITZ J., 1988: Immunocytochemical localization of actin and tubulin in rat testis and spermatozoa. Histochemistry 89(3): 261-268 Using commerical monoclonal antibodies against actin and tubulin (.alpha. and .beta.), the respective antigens were localized on semithin and ultrathin sections of the rat testis. Tubulin immunofluorescence was found in the socalled manchette surrounding the heads of the maturating spermatids as well as the sperm tail. The distribution pattern varied with sperm development. Modified Sertoli cells found at the transition between the seminiferous tubules and the rete testis displayed much filamentous tubulin-reactive material. The immunofluorescence findings could be confirmed at the ultrastructural level using the indirect immunogold method. Actin immunofluorescence was demonstrated in vascular smooth muscle cells, interstitial macrophages and.sbd.most intensely.sbd.in peritubular cells. Inside the seminiferous tubules the Sertoli cell junctions and the ectoplasmic specializations of the Sertoli cells that follow the outer contour of spermatid heads displayed distinct actin immunofluorescence. In addition to the locations mentioned, actin-like immunoreactivity was visualized at the ultrastructural level in the chromatoid body and the subacrosomal space of spermatids as well as on the outer dense fibers of the sperm tail. Immunoblotting experiments with actin antibodies showed that in extracts from testicular spermatozoa, intact or fragmented into heads and tails, from isolated Sertoli cells grown in vitro, and from testis tissue in addition to authentic actin a protein was present in sperm tail extracts that strongly bound the actin antibody. This protein may be an actin-related protein and may be responsible for the actin-like immunoreactivity of the outer dense fibers of the sperm tail. Click here to order any other PDF Full Text
Accession: 005629611 PMID: 3403301 DOI: 10.1007/bf00493150 Download PDF Full Text: Immunocytochemical localization of actin and tubulin in rat testis and spermatozoa
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