[No authors listed]
OBJECTIVE:To study the function of the SP3111 protein in fertilization and early embryo development through in vitro fertilization (IVF) experiments following anti-SP111 antibody (Ab2438) blocking. METHODS:Sperm samples collected from male mice were divided into an experimental, a blank control and a negative control group before IVF. The sperm of the experimental group was incubated with Ab2438 for 1 h followed by IVF and observed for the rates of fertilization and embryo fragmentation at 2, 4, 6, 8 and 22 h. Then the fertilized eggs were incubated with Ab2438, and the rates of fertilization embryo fragmentation were observed at 22 h. RESULTS:After the sperm was incubated with Ab2438, the incidences of embryo fragmentation were 5.26, 8.77, 23.25, 43.42 and 59.21% at 2, 4, 6, 8 and 22 h, respectively, with significant differences from the control groups (P < 0.01). After 22 h Ab2438 incubation of the fertilized eggs, the rates of normal and fragmented embryos of the experimental group were 23.64 and 63.64%, respectively, significantly different from those of the control groups (P < 0.01). CONCLUSION:Anti-SP3111 antibodies remarkably affected fertilization and early embryo development in mice. The SP3111 protein may be a signal molecule and plays a role in fertilization and early embryo development together with other proteins. Further studies on the function of the SP3111 protein in reproduction may offer a new insight into the molecular mechanism of infertility.
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