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• W1997209743 endingPage "204" @default.
• W1997209743 startingPage "193" @default.
• W1997209743 abstract "Bovine spermatozoa were incubated in vitro with lysophosphatidylserine (LPS), lysophosphatidylcholine (LPC), lysophosphatidylethanolamine (LPE), lysophosphatidylinositol (LPI), or trypsin. Capacitation of sperm was evaluated by penetration of the zonae pellucidae of dead bovine oocytes. Capacitation times could be shortened to 3 h or less by treatment of spermatozoa with each of these lysophospholipids (LPLs) (P < .05). The maximum oocyte penetration percentages for individual LPLs were 40% for 10 μM LPS, 24% for 160 μM LPC, 31% for 320 μM LPE, and 19% for 320 μM LPI. Capacitation also was facilitated (P < .01) by trypsin treatment of spermatozoa. Spermatozoa treated with 250 or 2,500 units/ml of trypsin penetrated more oocytes (17 and 18%) than spermatozoa treated with 0 or 25 units/ml of trypsin (0 and 3%). Spermatozoa treated with increasing concentrations of LPL showed a decrease in both the percentage of intact acrosomes and of progressively motile spermatozoa. Increasing levels of trypsin in the incubation medium also led to a decrease (P < .05) in the percentages of intact acrosomes and a decrease (P < .01) in the percentages of progressively motile spermatozoa. Percentages of live, ovulated oocytes fertilized by spermatozoa incubated for 1 h in LPS (86%, 6/7) were not different from those incubated for 24 h in control medium (71%, 5/7). Percentages of oocytes fertilized with both of these capacitation treatments were higher (P < .05) than for oocytes exposed or killed or uncapacitated sperm. Rapid induction of capacitation and the acrosome reaction can be accomplished by exogenous treatment of bovine sperm with lysophospholipids or trypsin." @default.
• W1997209743 created "2016-06-24" @default.
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• W1997209743 date "1989-02-01" @default.
• W1997209743 modified "2023-10-14" @default.
• W1997209743 title "Capacitation of bovine spermatozoa by lysophospholipids and trypsin" @default.
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• W1997209743 doi "https://doi.org/10.1002/mrd.1120220207" @default.
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