POSITIVE EFFECT OF APOPTOTIC INHIBITOR Z-VAD-FMK ON VITRIFIED-THAWED PORCINE MII STAGE OOCYTES

文献类型： 外文期刊

第一作者： Niu, Yingfang

作者： Niu, Yingfang;Dai, Jianjun;Chen, Yaning;Wu, Caifeng;Zhang, Shushan;Zhang, Defu

作者机构：

关键词： Z-VAD-FMK;apoptosis;development;vitrification;porcine oocytes

期刊名称：CRYOLETTERS （ 影响因子：1.066； 五年影响因子：1.0 ）

ISSN： 0143-2044

年卷期： 2016 年 37 卷 3 期

页码：

收录情况： SCI

摘要： BACKGROUND: The developmental potential of vitrified porcine oocytes is very lower, and apoptosis is considered as one of the key factors involved. OBJECTIVE: To investigate the effects of apoptotic inhibitor Z-VAD-FMK addition into the incubation medium after warming on apoptosis and developmental ability of vitrified porcine MII-stage oocytes. MATERIALS AND METHODS: The activities of several caspases, mitochondrial membrane potential (Delta Psi m) and early apoptotic levels were measured. Parthenogenetic developmental ability and relative expression levels of apoptosis related genes were also detected. RESULTS: Caspase activity and early apoptotic level of the Z-VAD-FMK group were significantly lower than those of the group without Z-VAD-FMK addition, but were much higher than those of fresh group (P < 0.05). The Delta Psi m of Z-VAD-FMK group was 1.19, higher than the vitrified group (0.91) and lower than the fresh group (1.33). The cleavage rate and blastocyst rate after parthenogenetic activation in the Z-VAD-FMK group were much higher than those in the vitrified group, and much lower than those in the fresh group (P < 0.05). Vitrified porcine oocytes exhibited increased expression of pro-apoptotic genes (caspase 3, 8, 9, TNF-alpha) and decreased genes expression levels of anti-apoptotic genes (Bcl-2, CuZnSOD), and the Z-VAD-FMK addition in incubaiton medium significantly decreased the transcripts levels of caspase 3,8,9, Box, TNF-alpha and increased Bcl-2 and CuZnSOD genes expression. CONCLUSION: The addition of apoptotic inhibitor Z-VAD-FMK into the incubation medium after warming improved the in vitro developmental ability of vitrified porcine oocytes by increasing mitochondrial function, reducing apoptotic level and changing apoptosis-elated gene expression.

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