Effect of leptin on oocyte maturation and subsequent pregnancy rate of cloned embryos reconstructed by somatic cell nucl

Cloning pigs by somatic cell nuclear transfer (SCNT) has wide applications in basic research,human medicine and agricultural production.To improve cloning efficiency,the effect of two basic maturation media,NCSU-23 and TCMI99,was compared,and TCM199 was selected for the following experiments with leptin.We systematically studied the effects of leptin supplementation on oocytes in vitro maturation (IVM),in vitro development of parthenogenetically activated (Phi) and SCNT embryos and/n vivo develop-ment of SCNT embryos after embryo transfer (ET).The results showed that supplementation of 100 or 200 ng/ml leptin into the mat-uration medium did not greatly affect nuclear maturation of oocytes,or cleavage rates of PA and SCNT (P<0.05).Blastocyst rates of PA and SCNT embryos were significantly improved when 100 or 200 ng/ml leptin was added to maturation medium,and the number of cells in PA blastocysts was also improved (P<0.05).The number of cells in blastocyst of SCNT was improved,when 100 ng/ml leptin was added (P<0.05).Furthermore,supplementation of 100 or 200 ng/ml leptin to the IVM medium may improve pregnancy rate and the delivery rate in pig cloning.

作 者： Hengxi Wei Qiuyan Li Jun Li Yan Li Yunping Dai Yufang Ma Kai Xue Ning Li   作者單位： Hengxi Wei,Jun Li,Yufang Ma,Kai Xue,Ning Li(State Key Laboratory for Agrobiotechnology and Department of Animal Physiology, China Agricultural University, Beijing 100094, China)

Qiuyan Li,Yunping Dai(State Key Laboratory for Agrobiotechnology and Department of Animal Physiology, China Agricultural University, Beijing 100094, China;Ji Pulin Biotech Ltd., Beijing 100094, China)

Yan Li(Ji Pulin Biotech Ltd., Beijing 100094, China) 

刊 名： 自然科學進展（英文版）  SCI 英文刊名： PROGRESS IN NATURAL SCIENCE  年，卷(期)： 2008 18(12)  分類號： N1  關鍵詞： Leptin   Oocytes   IVM   SCNT   Pig  

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