Peroxiredoxin II mRNA在小鼠卵泡发育中定位的研究

目的　观察PeroxiredoxinIImRNA在小鼠卵巢各级卵泡和MII卵中的分布 ,为了解PeroxiredoxinII在卵母细胞发育及成熟过程中的功能意义提供形态学依据。　方法　原位杂交方法。　结果　在小鼠卵巢内 ,原始卵泡的初级卵母细胞未检到PeroxiredoxinIImRNA的杂交信号 ,初级卵泡的初级卵母细胞可检到杂交信号 ,次级卵泡和近成熟卵泡中卵母细胞的信号明显增强。离开卵巢的GV卵也能检到较强的杂交信号 ,排到输卵管的次级卵母细胞 (MII卵 )杂交信号与GV卵相比明显减弱。从原始卵泡到近成熟卵泡周围的卵泡细胞均可检到杂交信号 ,其信号强度在卵泡发育成熟过程中未见有明显变化。卵母细胞和卵泡细胞的PeroxiredoxinIImRNA杂交信号均分布在胞质。　结论　提示PeroxiredoxinII可能参与了卵母细胞生长发育和卵母细胞成熟过程的调节。

STUDY ON THE LOCALIZATION OF PEROXIREDOXIN II mRAN IN FOLLICLES AT DIFFERENT STAGES IN MOUSE OVARIES BY IN SITU HYBRIDIZATION

Objective In this study, we investigated the distribution of Peroxiredoxin II mRNA in follicles at all stages in mouse ovaries and mouse secondary oocytes(MII eggs) basing on our previous researches, to provide the morphological basis for exploring the effect of Peroxiredoxin II on oogenesis and oocyte maturation in the mouse. Methods To observe the distribution of Peroxiredoxin II mRNA in follicles at all stages in ovaries and the localization of Peroxiredoxin II mRNA in Germinal-Vesicle intact oocytes(GV oocytes) and MII eggs by in situ Hybridization. Results In situ hybridization of ovary section revealed that the signals for Peroxiredoxin II mRNA were undetectable in oocytes of primordial follicles, and moderate signals for Peroxiredoxin II mRNA were observed in oocytes of primary follicles. Moreover, strong signals for Peroxiredoxin II mRNA were evident in antral follicles. The signals for Peroxiredoxin II mRNA also existed in GV oocytes and MII eggs in vitro. The hybrid signals were stronger in GV oocytes than in MII eggs. In addition, the weak but consistent signals for Peroxiredoxin II mRNA were detected in follicular cells from primordial follicles to large antral follicles. Peroxiredoxin II mRNA was located in cytoplasm of oocytes and follicular cells, but not in nuclei.Conclusion These results suggested that Peroxiredoxin II might be involved in the regulation of oogenesis and oocyte matruation in the mouse.;