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-  2016 

Plexin A1蛋白及mRNA在小鼠卵泡发育过程中的表达 Expression of Plexin A1 Protein and mRNA in Mouse Ovarian Follicular Development

Keywords: Plexin A1,卵泡发育,免疫组织化学,实时定量聚合酶链反应

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Abstract:

目的:探讨Plexin A1在小鼠卵巢不同发育阶段的表达。方法:选择不同发育时期的C57BL/6j小鼠,采用免疫组织化学方法测定小鼠卵巢中Plexin A1蛋白水平的表达,实时定量聚合酶链反应(real-time PCR)方法检测Plexin A1mRNA水平的表达。结果:Plexin A1蛋白在小鼠卵巢各级卵泡的卵母细胞和颗粒细胞中均有表达。随着卵泡的不断发育,其在卵母细胞和颗粒细胞中的表达水平均逐渐增强。始基卵泡卵母细胞中的Plexin A1蛋白表达水平明显低于初级、次级和窦状卵泡的卵母细胞。始基卵泡颗粒细胞中未见明显Plexin A1蛋白表达,至初级卵泡阶段可见颗粒细胞开始有Plexin A1蛋白表达,其水平低于次级及窦状卵泡。闭锁卵泡中的Plexin A1呈强阳性表达,明显高于生长卵泡中的表达水平。Plexin A1mRNA在卵巢组织中的表达水平随周(日)龄呈先升高后降低的趋势,5d,7d,3周小鼠卵巢中Plexin A1 mRNA表达水平分别为3d小鼠的1.56、1.26、0.79倍(P<0.05),而2周小鼠卵巢中的Plexin A1mRNA表达水平与3d小鼠相当(P>0.05)。结论:Plexin A1在不同级别的小鼠卵泡中均有表达,且表达水平随卵泡的不断生长发育而增强,但闭锁卵泡中表达最强,提示Plexin A1在卵泡的生长发育及闭锁过程中可能发挥重要的调控作用

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