蛋白激酶Cα在小鼠孤雌及四倍体胚胎早期发育过程的分布与作用.pdf
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生理学报 Acta Physiologica Sinica, February 25, 2008, 60 (1): 105-112 105
研究论文
蛋白激酶 Cα 在小鼠孤雌及四倍体胚胎早期发育过程中的分布
和作用
陈雅隽,申景岭,冯秀清,单智焱,阎晓飞,董建将,钟淑琦,雷蕾*
哈尔滨医科大学组织学与胚胎学教研室,哈尔滨 150081
摘 要:为了观察蛋白激酶Cα (protein kinase Cα, PKCα)在昆明白小鼠受精卵、孤雌激活和四倍体胚胎早期发育阶段的亚
细胞定位和致密化进程中的表达变化,本实验利用免疫荧光化学染色与激光共聚焦显微镜观察相结合的方法,对受精卵、
孤雌激活和四倍体胚胎早期发育阶段PKCα 的表达进行了定位观察,并利用Western blot 对三组胚胎致密化进程中PKCα 的
表达进行定量分析。结果显示,PKCα 在上述三组胚胎发育的2- 细胞期至囊胚期均有表达,虽然不同胚胎PKCα 的分布在
同一发育阶段存在差异,却表现出在各胚胎期主要分布于卵裂球核染色质内,以及在胚胎致密化开始,PKC α 在卵裂球连
接处发生重新分布的共同特点。此外,三组胚胎PKC α 在致密化进程中的表达呈升高趋势,即致密化后的表达高于致密
化前。结果表明,PKC α 对胚胎致密化的调节具有重要作用,其在8- 细胞/4- 细胞期的重新分布是胚胎进入桑椹胚期的必
然事件,是胚胎致密化的前提,同时伴随蛋白表达增多。此外,PKC α 在囊胚期发生了植入前的第二次重新分布。PKC α
在三组胚胎各发育阶段表达情况各不相同,它对小鼠胚胎发育的影响体现在整个早期发育阶段。PKC α 在小鼠受精卵早期
发育阶段的两次重新分布可能与在致密化开始时启动的细胞黏附事件存在某种必然联系。
关键词:蛋白激酶C α ;孤雌胚胎;四倍体胚胎;致密化
中图分类号:R 3 2 1
Location and role of protein kinase Cα in parthenogenetic and tetraploid
preimplantation embryonic development in mouse
CHEN Ya-Jun, SHEN Jing-Ling, FENG Xiu-Qing, SHAN Zhi-Yan, YAN Xiao-Fei, DONG Jian-Jiang,
ZHONG Shu-Qi, LEI Lei*
Department of Histology and Embryology, Harbin Medical University, Harbin 150081, China
Abstract: Protein kinase C (PKC) is a critical molecule in cellular signal transduction in mammals. It is involved in many biological processes
in embryonic development, including nuclear remodeling, cell cycle adjustment and cellular polarity regulation. The present study aimed
to observe the location of PKCα, an important isozyme of PKC, in fertilized, parthenogenetic and tetraploid preimplantation embryos,
and compare the expression of PKCα during embryonic compaction in Kunming mice. The location of PKCα was detected by
immunochemistry and laser confocal microscopy. Western blot was performed to quantify PKCα expression during embryonic
compaction in the three kinds of embryos. In the experiment, fertilized embryos were flushed from oviduct or uterus at 45, 52, 69, 76
and 93 h after injection of
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