However, it has been reported that glucose is an essential component for inducing the
acrosome reaction of spermatozoa and for supporting fertilization in mice (Fraser and Quinn, 1981).
Activation of protein kinase A during human sperm capacitation and
acrosome reaction.
Therefore, phosphorylation of proteins, which is a post-translational modification event that acts as one of the cell's regulatory mechanisms to control various processes, is important in regulation of sperm capacitation, hyperactivation and
acrosome reaction.
Last, the roles of egg jelly and vitelline envelope in inducing a sperm
acrosome reaction and enhancing motility were demonstrated.
Structural comparisons among glycosaminoglycans to promote an
acrosome reaction in bovine spermatozoa.
Stages Diameter Time Unfertilized eggs 180 [micro]m 0 sec Sperm attached to egg 185 [micro]m 20-30 sec Sperm
acrosome reaction 185 [micro]m ~1 min Sperm-egg membrane fusion 180 [micro]m 2-3 min Appearance of first polar body 185 [micro]m 8-9 min Appearance of second 185 [micro]m 10 min polar body First cleavage 200 [micro]m 15-20 min Second cleavage 195 [micro]m 35-40 min Morula 200 [micro]m 45-55 min Blastula 192 [micro]m 75-85 min Gastrula 192 [micro]m 85-90 min Trochophore larvae 210 [micro]m 90-250 min Early veliger 225 [micro]m 5-24 h Late veliger 228 [micro]m 28-40 h Early creeping larvae 230 [micro]m 48-72 h Creeping larvae 300 [micro]m 3-6 days Juvenile 2 [micro]m 30 days
Ram spermatozoa cocultured with epithelial cell monolayers: an in vitro model for the study of capacitation and the
acrosome reaction.
A stimulatory effect of methyl xanthine on capacitation and
acrosome reaction has also been demonstrated (Aitken et al.
The potential role of the jelly layer in sperm chemotaxis or induction of the
acrosome reaction is unknown in dreissenids, although quantitative observations show both D.
One study showed that saquinavir, commonly used in HAART regimens, results in decreased sperm motility in vitro and negatively affects mechanisms that are essential to fertilization of an oocyte such as the
acrosome reaction (50).
25 mg/ml) showed lowest
acrosome reaction and highest vitality rate.
Effect of antisperm antibodies present in human follicular fluid upon the
acrosome reaction and spermzona pellucida interaction.
