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- W973314269 abstract "Localization of proteasomes in spermatozoa from patients with varicocele-associated sterility was studied by means of immunolabeling with the MPC21 monoclonal antibody detecting the C3 subunit of the 20S proteasome. The reaction was visualized for electron microscopy using the secondary Nano-Gold-coupled antibody with Gold-Enhancement in pre-embedding technique. We found that semen samples from varicocele patients contained a large amount of abnormal spermatozoa characterized by the presence of dispersed chromatin and large residual bodies (cytoplasmic droplets) as well as spermatids at various stages of spermiogenesis. In normal spermatozoa, the immunolabeling was found in the acrosome, postacrosomal regions, nuclear vacuoles, in the neck and in the middle-piece as well as in the residual bodies, while chromatin remained unlabeled. In varicocele spermatozoa, the immunolabeling was also associated with chromatin and large residual bodies (cytoplasmic droplets). In contrast to normal, mature spermatozoa, the chromatin of the cells at earlier stages of spermiogenesis was strongly immunolabeled. The association of proteasomes with sperm chromatin and large residual bodies can be the sign of abnormality and disturbances in spermatogenesis associated with varicocele." @default.
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- W973314269 date "2002-01-01" @default.
- W973314269 modified "2023-10-16" @default.
- W973314269 title "Proteasome localization and ultrastructure of spermatozoa from patients with varicocele--immunoelectron microscopic study." @default.
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