Surface Changes in Rat Spermatozoa During Epididymal Transit1
نویسندگان
چکیده
منابع مشابه
Changes in Mithun (Bos frontalis) spermatozoa during epididymal passage.
Genital organs of 10 healthy, adult Mithun bulls (6-8 years old) that were slaughtered at the dwellings of tribal people for meat were collected. Immediately after collection, spermatozoa from 3 different regions of the epididymis, i.e. the head, body and tail, were obtained to study morphological changes of the spermatozoa during passage through these regions. The prevalence of proximal cytopl...
متن کاملProteomic changes in mammalian spermatozoa during epididymal maturation.
Epididymal maturation is associated with the activation of a cAMP-induced tyrosine phosphorylation cascade, which is ultimately associated with the expression of capacitation-dependent sperm functions, such as hyperactivated movement and acrosomal exocytosis. As spermatozoa progress through the epididymis they first acquire the capacity to phosphorylate tyrosine on targets on the principal piec...
متن کاملMorphological and acrosomal changes of canine spermatozoa during epididymal transit
BACKGROUND During epididymal transit, functional and structural modifications leading to full maturation enable male gametes to reach, recognize and fertilize the oocytes. In dogs, little is known on the modifications of spermatozoa during the passage in the epididymis. The aim of this study was to describe the motility, morphology and acrosomal patterns of canine spermatozoa retrieved from the...
متن کاملLectin-binding sites on the plasma membranes of rabbit spermatozoa: Changes in surface receptors during epididymal maturation and after ejaculation
MODIFICATIONS IN RABBIT SPERM PLASMA MEMBRANES DURING EPIDIDYMAL PASSAGE AND AFTER EJACULATION WERE INVESTIGATED BY USED OF THREE LECTINS: concanavalin A (Con A); Ricinus communis I (RCA(I)); and wheat germ agglutinin (WGA). During sperm passage from caput to cauda epididymis, agglutination by WGA drastically decreased, and agglutination by RCA(I) slightly decreased, although agglutination by C...
متن کاملChanges in calmodulin level and cAMP-dependent protein kinase activity during epididymal maturation of ram spermatozoa.
Calmodulin concentration and cAMP-dependent protein kinase activity were simultaneously determined on ram spermatozoa collected by cannulation of successive segments of the epididymal tubule. Epididymal transit was characterized on one hand by an overall decrease in the calmodulin level and on the other by a dramatic rise in the cAMP-dependent protein kinase activity. In contrast to the calmodu...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 1981
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod24.2.431