国际妇产科学杂志 ›› 2015, Vol. 42 ›› Issue (2): 187-190.

• 论著 • 上一篇    下一篇

雌激素对去势大鼠端粒酶活性的影响

岑加萍,张红艳,黄坚,刘元伟,邓妙,张治芬   

  1. 310006 杭州,南京医科大学附属杭州医院妇产科
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2015-04-15 发布日期:2015-04-15
  • 通讯作者: 张治芬

Effect of Estrogen on Telomerase Activity in Ovariectomized Rats

CEN Jia-ping,ZHANG Hong-yan,HUANG Jian,LIU Yuan-wei,DENG Miao,ZHANG Zhi-fen   

  1. Department of Obstetrics and Gynecology,Nanjing Medical University Affiliated Hangzhou People′s Hospital,Hangzhou 310006,China
  • Received:1900-01-01 Revised:1900-01-01 Published:2015-04-15 Online:2015-04-15
  • Contact: ZHANG Zhi-fen

摘要: 目的:探讨雌激素对去势雌性SD大鼠端粒酶活性的影响,从而研究其抗衰老作用机制。方法:将33只3个月龄雌性大鼠随机分为3组,去势实验组(11只)开始用戊酸雌二醇(E2)+0.9%氯化钠溶液按0.21 mg/kg灌胃,去势对照组(11只)、假手术组(11只)给予等量0.9%氯化钠溶液灌胃,1次/d。12周后腹主动脉采血,酶联免疫吸附测定(ELISA)法测定血清E2、卵泡刺激素(FSH),处死大鼠后快速摘取心脏、肝脏、脑组织,通过逆转录聚合酶链反应(RT-PCR)和ELISA法分别检测各组织端粒酶活性及端粒酶逆转录酶(TERT)mRNA水平。结果:去势实验组和假手术组血清E2水平高于去势对照组,血清FSH水平低于去势对照组(均P<0.05);去势实验组端粒酶活性的ΔA值高于去势对照组和假手术组(均P<0.05),去势对照组和假手术组端粒酶的活性均为阴性,ΔA值较低,差异无统计学意义(P>0.05);去势实验组大鼠心脏、肝脏和脑组织TERT mRNA ΔCt值低于去势对照组及假手术组(均P<0.05),而去势对照组和假手术组TERT mRNA ΔCt值差异无统计学意义(均P>0.05)。结论:雌激素可以显著提高去势雌性大鼠端粒酶活性及TERT mRNA水平,进而发挥其抗衰老作用。

关键词: 雌激素类, 端粒, 端粒, 末端转移酶, 绝经期, 衰老

Abstract: Objective:The aim of this study was to investigate the anti-aging effect of oral estrogen on the telomerase activity in ovariectomized female Sprague-Dawley(SD) rats. Methods:Thirty-three three-month-old female rats were randomly divided into ovariectomized experimental group (Treated, n=11), ovariectomized control group (OVX, n=11) and sham-operated group(Sham, n=11). The rats in the Treated group were given 0.21 mg/kg estradiol(E2) valerate intragastric administration while other two groups were given the equal physiological saline intragastric administration. All of the animals were euthanized 12 weeks after treatment, and abdominal aortic blood samples were taken to assess the level of E2, follicle stimulating hormone (FSH) by ELISA. Telomerase activity and telomerase reverse transcriptase(TERT) mRNA expression in the heart, liver, brain tissues of all rats were measured by TRAP-ELISA and RT-PCR, respectively. Results:The serum E2 level in the Treated and Sham group were significantly higher than that in the OVX group(P<0.05). The serum FSH levels were significantly lower than that in the OVX group (P<0.05). Compared to the OVX and the Sham group, the value of ΔA on telomerase activity in the Treated group was significantly increased(P<0.05). The telomerase activity was negative and ΔA value was low in the OVX and Sham group, no statistical difference between them(P>0.05). The value of TERT mRNA ΔCt in the heart, liver and brain tissues in the Treated group were significantly lower than those in the OVX and Sham group(P<0.05). But there was no significant difference between the OVX and Sham group(P>0.05). Conclusions:Estrogen can significantly up-regulate telomerase activity and TERT mRNA expression in the ovariectomized female SD rats to delay senescence.

Key words: Estrogens, Telomere, Telomerase, Menopause, Aging