Acrosome reaction
Regulating the acrosome reaction
... PIP3 is typically a trace component of the membranes of unstimulated cells and is produced locally at the site of PI3 kinase activation. Proteins containing specific PIP3 binding domains, including a PH or PX domain, are ...
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Absence of spermatozoal CD46 protein expression and associated rapid acrosome reaction rate in striped field mice (Apodemus agrarius)
... faster acrosome reaction rate than Mus and, indeed, ...unstable acrosome, enabling the dissociation of sperm trains via a premature acrosome ...
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Nitric oxide involvement in the acrosome reaction triggered by leptin in pig sperm
... Background: Nitric oxide (NO) is a signaling molecule produced by intracellular nitric oxide synthase (NOS) enzymes. This free radical appears to affect sperm capacitation, a maturation step preceding acrosome ...
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Identification of the sperm motility initiating substance in the newt, Cynops pyrrhogaster, and its possible relationship with the acrosome reaction during internal fertilization
... sperm acrosome-stabilizing factor in Bufo (Krapf et al., 2006), and an acrosome reaction-inducing substance in Cynops (Sasaki et ...and acrosome reaction- inducing activities (Sasaki et ...
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Regulation of the starfish sperm acrosome reaction by cGMP, pH, cAMP and Ca2+
... the acrosome reaction (AR), which makes the sperm capable of fertilization, involves the exocytosis of the acrosome vesicle and the polymerization of actin to form the acrosome process (Dan, ...
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Delineation of downstream signalling components during acrosome reaction mediated by heat solubilized human zona pellucida
... total reaction volume of 100 ...of acrosome reaction, sperm were also incubated with BWW + ...the acrosome or revealed staining at the equatorial region was classified as ...some ...
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Characterization of Testicular Angiotensin Converting Enzyme before and after Semen Cryopreservation and in the Acrosome Reaction of Spermatozoids of Nelore Bulls
... were prepared. Aliquots of samples were used for western blot analysis, sub- jected to capacitation, and thereafter, acrosome reaction assays were per- formed in vitro . With the help of an anti-ACE ...
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Dose-response effects of estrogenic mycotoxins (zearalenone, alpha- and beta-zearalenol) on motility, hyperactivation and the acrosome reaction of stallion sperm
... live acrosome-reacted sperm, zearalenone and 17beta-estradiol had no apparent effect on acrosome ...the acrosome reaction. Beta-zearalenol induced the acrosome reaction without ...
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Egg jelly signal molecules for triggering the acrosome reaction in starfish spermatozoa
... Int J Ue BinI 38 167 174 (1994) 167 Special Review Egg jelly signal molecules for triggering the acrosome reaction in starfish spermatozoa MOTONORI HOSHI', TAKUYA NISHIGAKI, AKIRA USHIYAMA, TATSUYUKI[.] ...
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Acrosome reaction and chromatin integrity as additional parameters of semen analysis to predict fertilization and blastocyst rates
... the acrosome reaction (AR), which is an es- sential event for sperm ...The acrosome is considered a large secretory granule that contains sev- eral enzymes including glycohydrolases, proteases, ...
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Role of tyrosine phosphorylation in sperm capacitation / acrosome reaction
... Mature spermatozoa are terminally differentiated and specialized cells. They are highly compartmentalized but are devoid of any major transcriptional and translational activity. Therefore one can justify the importance ...
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The Relationship between Acrosome Reaction and Polyunsaturated Fatty Acid Composition in Boar Sperm
... The acrosome is generated from the acrosomal granules of the spermatogonia stem cells and moves to the anterior part of the sperm head during spermiogenesis ...the acrosome reaction must occur at the ...
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Prostasome-like vesicles stimulate acrosome reaction of pig spermatozoa
... on acrosome reac- tion has been investigated only in humans, but with con- troversial results probably due to the complex events involved in this ...the acrosome reaction [30], consistently with the ...
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Group X phospholipase A2 is released during sperm acrosome reaction and controls fertility outcome in mice
... is the major enzyme present in the acrosome of spermatozoa and that it is released in an active form dur- ing capacitation through spontaneous AR. mGX-deficient male mice produced smaller litters than wild-type ...
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Intratesticular distribution of cyritestin, a protein involved in gamete interaction
... of acrosome-intact as well as acrosome-reacted sperm plasma membranes, which contrasts with the results obtained by Linder et ...the acrosome by vesicular transport from the Golgi, becoming a ...
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Sperm binding to the zona pellucida is not sufficient to induce acrosome exocytosis
... the acrosome, a Golgi-derived exocytotic vesicle overlying the condensed sperm nucleus that releases its partially characterized contents during fertilization (Abou-Haila and Tulsiani, ...only ...
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Silymarin protects plasma membrane and acrosome integrity in sperm treated with sodium arsenite
... and acrosome reaction. Acrosome integrity is also required for the penetration of the sperm into the zona pellucid and ...and acrosome integrity could be useful for predicting the fertilizing ...
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Relationship between acrosome integrity changes and in vitro fertilising ability of bovine spermatozoa
... the acrosome reaction, culture media for in vitro oocyte fertilisation are supple- mented with different agents, in cattle preferen- tially with heparin, which stimulates capacitation of bovine spermatozoa ...
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Targeted and restricted complement activation on acrosome reacted spermatozoa
... the acrosome reaction, an exocytosis event that occurs upon contact with the zona ...that acrosome-reacted sper- matozoa activated the complement cascade efficiently through C3 but not ...
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La réaction acrosomique
... : The influence of medium composition, osmolarity and albumin content on the acrosome reaction and fertilizing capacity of human spermatozoa : development of an improved [r] ...
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