Hyperactivation Enhances Mouse Sperm Capacity for Penetrating Viscoelastic Media1
نویسندگان
چکیده
منابع مشابه
P-56: The Effect of Hydrostatic Pressure on Mouse Sperm Hyperactivation
Background: Mammalian sperm are not ready to fertilize oocyte immediately after ejaculation. Sperm achieve this ability after undergoing the processes of capacitation and hyperactivation. Hyperactivation refers to a change in the motility pattern of the sperm. Pharmacological reagents and physical-mechanical forces have been used in sperm from a variety of species. Hydrostatic pressure is a cru...
متن کاملControl of hyperactivation in sperm.
BACKGROUND Sperm hyperactivation is critical to fertilization, because it is required for penetration of the zona pellucida. Hyperactivation may also facilitate release of sperm from the oviductal storage reservoir and may propel sperm through mucus in the oviductal lumen and the matrix of the cumulus oophorus. Hyperactivation is characterized by high amplitude, asymmetrical flagellar bending. ...
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When females mate promiscuously, sperm from rival males compete within the female reproductive tract to fertilize ova. Sperm competition is a powerful selective force that has shaped sexual behavior, sperm production, and sperm morphology. However, nothing is known about the influence of sperm competition on fertilization-related processes, because it has been assumed that sperm competition onl...
متن کاملChanges in sperm plasma membrane lipid diffusibility after hyperactivation during in vitro capacitation in the mouse
We have used the technique of fluorescence recovery after photobleaching to measure the diffusibility of the fluorescent lipid analogue, 1,1'-dihexadecyl 3,3,3',3'-tetramethylindocarbocyanine perchlorate on the morphologically distinct regions of the plasma membranes of mouse spermatozoa, and the changes in lipid diffusibility that result from in vitro hyperactivation and capacitation with bovi...
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OBJECTIVE Studying the impact of Hepatitis B virus S protein (HBs) on early apoptotic events in human spermatozoa and sperm fertilizing capacity. METHODOLOGY/PRINCIPAL FINDINGS Spermatozoa were exposed to HBs (0, 25, 50, 100 µg/ml) for 3 h, and then fluo-4 AM calcium assay, Calcein/Co(2+) assay, protein extraction and ELISA, ADP/ATP ratio assay, sperm motility and hyperactivation and sperm-zo...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 1992
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod46.4.686