滋肾育胎丸对促排卵小鼠不同着床期子宫内膜HOXA10及下游基因EMX2表达的调控作用

Regulatory Effects of Zishen Yutai Pills on Expression Levels of HOXA10 and Its Downstream Gene EMX2 in Endometria of Ovulation-inducing Mice at Different Implantation Stages

【目的】探讨滋肾育胎丸对促排卵小鼠不同着床期子宫内膜同源框异型基因A10(HOXA10)及下游基因空通气孔同源框2(EMX2)表达的调控机制。【方法】将75只雌性动情间期昆明小鼠随机分为5组,即正常组、模型1组、模型2组、治疗1组、治疗2组,每组15只。模型1组给予促排卵短方案;模型2组给予促排卵长方案。治疗1组在模型1组方案基础上给予滋肾育胎丸(剂量为0.4 g/mL)治疗;治疗2组在模型2组方案基础上给予滋肾育胎丸(剂量为0.4 g/mL)治疗。正常组给予等剂量生理盐水灌胃和腹腔注射。采用实时荧光定量聚合酶链反应(q PCR)、免疫蛋白印迹(Western blot)法分别检测各组小鼠子宫HOXA10及EMX2 mRNA和蛋白的表达。【结果】与正常组比较,模型1组和模型2组HOXA10 mRNA和蛋白表达水平均下降(P<0.01),EMX2 mRNA和蛋白表达水平均升高(P<0.01)。分别与对应的模型1组和模型2组比较,治疗1组和治疗2组HOXA10 mRNA和蛋白水平表达均显著上调(P<0.01),EMX2 mRNA和蛋白水平表达均显著下降(P<0.01)。【结论】滋肾育胎丸可能通过上调HOXA10表达及抑制其下游基因EMX2的表达来改善小鼠子宫内膜容受性。

Objective To investigate the regulatory effects of Zishen Yutai Pills on the expression levels of homeboxA10 （HOXA10） and its downstream target gene empty spiracles homebox 2 （EMX2） in the endometria of ovulation-inducing mice at different implantation stages. Methods Seventy-five estrous female Kunming mice were randomly divided into 5 groups, namely normal group, model group 1, model group 2, treatment group 1, treatment group 2, 15 mice in each group. The model group 1 was given short-term protocol for ovulation induction; the model group 2 was given long-term protocol for ovulation induction; the treatment group 1 was given Zishen Yutai pills （at the dose of 0.4 g/mL） on the basis of the protocol for the model group 1; the treatment group 2 was given Zishen Yutai Pills （at the dose of 0.4 g/mL） on the basis of the protocol for the model group 2; the normal group was given intragastric administration or intraperitoneal injection of the same volume of normal saline. The mRNA and protein expression levels of HOXA10 and EMX2 in mouse uterus were detected by real-time fluorescent quantitative polymerase chain reaction （qPCR） and Western blot method, respectively. Results Compared with the normal group, the mRNA and protein expression levels of HOXA10 were decreased, and the mRNA and protein expression levels of EMX2 were increased in model group 1 and model group 2（P〈 0.01）. Compared with the corresponding model group 1 and 2, the mRNA and protein expression levels of HOXA10 were significantly up-regulated （P 〈 0.01） , and the mRNA and protein expression levels of EMX2 were decreased in the treatment group 1 and 2 （P 〈 0.01）, respectively. Conclusion Zishen Yutai Pills may improve mouse endometrial receptivity by up-regulating HOXA10 expression and inhibiting EMX2 expression.