【摘要】 小鼠胚胎发育过程中,蛋白激酶C(PKC)家族在调节卵的活化、完成减数分裂和开始有丝分裂、胚胎的致密,以及囊胚形成过程中都有作用,但其多个亚型的功能还知之甚少。研究表明,已知的十种PKC亚型以及PKC锚定蛋白——活化的磷脂酶C受体(RACK)在小鼠胚胎2-细胞期至囊胚期都有表达。本文归纳了近年来对PKC亚型各自不同的动态分布模式和表达水平的研究,这些研究表明它们在早期胚胎发育的各个时期都至关重要,尤其在胚胎4-细胞期的早期,个别亚型在核内的浓度是瞬间升高的,提示我们这些PKC亚型也许控制着早期小鼠胚胎核的组建以及机能调节。本文对核移植胚胎中PKC的可能作用也进行了分析。更多还原

【Abstract】 Protein kinase C (PKC) family plays a critical role in many developmental events, including oocyte activation, completion of the second meiosis and initiation of the first mitosis, compaction, and blastocysts formation as well. But little is known of its many isozymes. Studies have shown that 10 isozymes of PKC and its anchor protein, RACK, are expressed in the course from 2 cell stage through blastocyst stage in mouse. We reviewed here the recent studies on the location pattern and expression levels of different PKC isozymes. Those studies indicated that the isozymes were very important for every stage of preimplantation embryonic development, especially at the early 4-cell stage. Some are increased temporarily in nucleus, which indicated that they might control and regulate the remolding of embryonic nucleus. We also analyzed the possible functions of PKCs in the somatic nuclear transferred embryos.更多还原