title: Localization of a proteasomal antigen in human spermatozoa: immunohistochemical electron microscopic study.
abstract: The ultrastructural localization of a proteasomal antigen in human spermatozoa was studied by means of immunolabeling with the MPC21 monoclonal antibody and secondary gold labeled antibody with 1.4 nm gold particles in combination with silver enhancement reaction using pre-embedding technique. The labeling was found in the acrosomal and postacrosomal regions, in the connecting-piece (neck) and, in some cases, in the middle-piece and also in the residual bodies. There was no significant reaction in condensed chromatin. In some abnormal forms of spermatozoa, in which the chromatin was not well condensed, the labeling in nuclei was present. The nuclear vacuoles with looser chromatin were usually strongly labeled. The nuclei of cells representing different stages of spermatogenesis, that were present in semen samples, were also labeled.
authors.affiliation: Department of Histology and Embryology, Medical Academy, Warsaw, Poland.
authors.forename: L P
authors.initials: LP
authors.lastname: Biały
authors.forename: H T
authors.initials: HT
authors.lastname: Ziemba
authors.forename: P
authors.initials: P
authors.lastname: Marianowski
authors.forename: S
authors.initials: S
authors.lastname: Fracki
authors.forename: M
authors.initials: M
authors.lastname: Bury
authors.forename: C
authors.initials: C
authors.lastname: Wójcik
mesh_terms: D000177:Acrosome / Q000648:ultrastructure; D000941:Antigens / Q000737:chemistry*; D003546:Cysteine Endopeptidases / Q000276:immunology*; D006801:Humans; D007150:Immunohistochemistry; D066298:In Vitro Techniques; D008297:Male; D016253:Microscopy, Immunoelectron; D009097:Multienzyme Complexes / Q000276:immunology*; D046988:Proteasome Endopeptidase Complex; D013094:Spermatozoa / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D000941:Antigens; D009097:Multienzyme Complexes; D003546:Cysteine Endopeptidases; D046988:Proteasome Endopeptidase Complex