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- W2034695919 abstract "To evaluate the effect of macrophage migration inhibitory factor (MIF) on sperm capacitation, a maturational process that occurs in the female reproductive tract and enables spermatozoa to become fully competent at fertilizing the oocyte.Incubation of Percoll-washed spermatozoa with varying concentrations of human recombinant MIF or fetal cord serum (positive control).Human reproduction research laboratories.Fresh semen samples obtained from healthy volunteers after a minimum of 2 days of sexual abstinence.Protein tyrosine phosphorylation by Western blotting, the acrosomal status upon binding to the Pisum sativum agglutinin conjugated to fluorescein isothiocyanate, and sperm motility by computer-assisted sperm analysis.MIF displayed a dose-dependent effect on the phosphotyrosine content of p105 and p81, the two major tyrosine-phosphorylated proteins associated with human sperm capacitation. A significant induction of tyrosine phosphorylation was seen at 2 ng/mL of MIF for both p105 and p81, but a trend for a down-regulation of the basal tyrosine phosphorylation level was noted at elevated concentrations (12-24 ng/mL). MIF pretreatment of spermatozoa resulted in a dose-dependent change in the acrosome reaction induced by the Ca(2+) ionophore A23187. After being increased at 1-4 ng/mL MIF with a statistically significant effect observed at 4 ng/mL, the acrosome reaction gradually decreased and fell below the control levels at higher concentrations. Furthermore, a significant decrease in the motility of spermatozoa was observed after exposure to an elevated concentration of MIF (12 ng/mL).The present data indicate that MIF may play a physiological role in sperm capacitation but may have deleterious effects on sperm function at abnormal pathophysiological levels, which suggests a role in endometriosis-associated infertility." @default.
- W2034695919 created "2016-06-24" @default.
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- W2034695919 date "2007-10-01" @default.
- W2034695919 modified "2023-10-14" @default.
- W2034695919 title "Direct effect of macrophage migration inhibitory factor on sperm function: possible involvement in endometriosis-associated infertility" @default.
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- W2034695919 doi "https://doi.org/10.1016/j.fertnstert.2007.04.002" @default.
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