Cell synchronization by Rapamycin improves the developmental competence of buffalos (Bubalus bubalis) somatic cell nuclear transfer embryos.

Reproduction in Domestic Animals = Zuchthygiene
Jie XuDeshun Shi

Abstract

This study mainly explored the effects of Rapamycin on the growth of the Buffalo ear fibroblast (BEF) and embryonic developmental competence of somatic cell nuclear transfer (SCNT). The results show that the appropriate concentration (1 μM) of Rapamycin could significantly improve the proportion of the G0/G1 phase in BEF cells treated at a certain time (72 hr). Simultaneously, the percentage of the G0/G1 phase also was significantly higher than the serum starvation and control group. This may be related to Rapamycin inhibiting the phosphorylation of mTOR and affecting the expression of cell cycle-related genes (CDK2, CDK4, P27, CycleD1, and CycleD3). Besides, compared with the control group and serum-starved group, Rapamycin significantly decreased BEF cell apoptosis by reducing ROS generation. Moreover, these results also indicated that the proportion of BEF cells with normal chromosome multiples treated by Rapamycin is significantly higher than that of the serum-starved group (p < .05). Finally, this study explored the effects of Rapamycin and serum starvation on the embryonic developmental competence of SCNT. The results show that Rapamycin significantly increased the rate of 8-cell and blastocyst, compared with the control ...Continue Reading

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