Cross-linked complexes formed between certain lectins and their specific multivalent carbohydrates and glycoconjugates on the sperm surface were studied for their ability to modify sperm membrane permeability and to induce the acrosome reaction. Wheat germ agglutinin (WGA), concanavalin A (Con A) and peanut agglutinin (PNA) increased the proportions of human spermatozoa permeable to the imperme...

To elucidate the molecular nature of human sperm autoantigens, attempts were made to raise monoclonal antibodies against these antigens, by hybridoma techniques. After successive immunizations with the particulate fractions of human sperm extract in BALB/c mice, the spleen cells were fused with P3-X63-Ag8 myeloma cells. Several clones and their subclones were obtained and shown by microplate ra...

Recently, the authors reported a novel dodecamer peptide sequence, designated as YLP12 on human sperm, that is involved in binding to zona pellucida (ZP) of human oocyte [10]. This unique sequence is present on the acrosomal region of the human sperm cell and is expressed only in human testis/ sperm. The aim of the present study was to examine whether YLP12 sequence is involved in capacitation/...

A radioimmunobinding method based on the blotting of renatured proteins from sodium dodecyl sulfate gels on to nitrocellulose filter papers was developed to analyze the sperm antigens that elicit serum anti-sperm antibodies. In rabbits, serum anti-sperm antibodies were raised by immunization with homologous epididymal spermatozoa mixed with complete Freund’s adjuvant. The raised antisera from e...

Environmental BPA exposure has been shown to impact human sperm concentration and motility, as well as rodent spermatogenesis. However, it is unclear whether BPA exposure is associated with alteration in DNA hydroxymethylation, a marker for epigenetic modification, in human sperm. A genome-wide DNA hydroxymethylation study was performed using sperm samples of men who were occupationally exposed...

BACKGROUND Assessment of sperm morphology (including morphometry) is extensively used to determine one of the qualities of a semen sample and depends on the differential staining of spermatozoa. A staining technique should cause as little change to sperm dimensions and form as possible in order to reliably evaluate the morphometric features of the sperm. Various staining techniques have been em...