畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (11): 2097-2103.doi: 10.11843/j.issn.0366-6964.2015.11.024

• 临床兽医 • 上一篇    下一篇

围产期小鼠子宫颈中糖皮质激素受体、11β羟基类固醇脱氢酶的表达

李亭亭#,田高强#,罗明久,黄丽波,葛利江*   

  1. (山东农业大学动物科技学院,泰安 271018)
  • 收稿日期:2015-03-04 出版日期:2015-11-23 发布日期:2015-11-23
  • 通讯作者: 葛利江,E-mail:glj@sdau.edu.cn
  • 作者简介:李亭亭(1989-),女,山东嘉祥人,硕士,主要从事动物生殖疾病与生殖内分泌的研究,E-mail:litingting0516@126.com。田高强为共同第一作者
  • 基金资助:

    山东省自然科学基金(ZR2010CM052)

Expression of Glucocorticoids Receptor,11β-Hydroxysteroid Dehydrogenase in the Cervices of Peripartal Mice

LI Ting-ting#,TIAN Gao-qiang#,LUO Ming-jiu,HUANG Li-bo,GE Li-jiang*   

  1. (College of Veterinary Medicine,Shandong Agricultural University,Tai’an 271018,China)
  • Received:2015-03-04 Online:2015-11-23 Published:2015-11-23

摘要:

旨在揭示糖皮质激素(GC)及糖皮质激素受体(GR)、11β羟基类固醇脱氢酶1和2(11βHSD-1和2)对围产期小鼠子宫颈成熟的影响和机制。选取围产期5个时间点,分别为产前48 h(-48 h)、产前24 h(-24 h)、分娩时(0 h)、产后12 h(+12 h) 和产后48 h(+48 h)。首先通过ELISA检测血清皮质酮浓度变化,再通过免疫组化对GR和影响GC活性的两个酶,11βHSD-1和11βHSD-2,进行免疫定位和半定量检测。ELISA结果显示围产期GC浓度呈先升高后下降趋势,分娩时达到峰值(P<0.01)。免疫组化结果显示,11βHSD-1、11βHSD-2和GR在子宫颈腔上皮、基质、血管和平滑肌细胞上均有分布,11βHSD-1/11βHSD-2平均光密度的比值呈现先升高再下降趋势,分娩时比值最高;GR的表达量也是分娩时最高,分娩前后较低的趋势(P<0.01)。以上结果提示11βHSD-1合成的糖皮质激素通过其受体在子宫颈的成熟过程中起着关键性作用。

Abstract:

The present study was designed to examine the pattern and cellular localization of 11β-hydroxysteroid dehydrogenase(11β-HSD) enzymes and glucocorticoids receptor(GR) gene expression in the murine cervix during peripartal period,and to gain insight into the role of glucocorticoid(GC) and GR,11β-HSD-1 and 2 in the cervical ripening of peripartal mice.Mice in five groups were from 48 h before birth(-48 h) and-24 h,at term labor(0 h),12 h after birth(+12 h) and +48 h.The dynamic change of the serum corticosterone level was determined by ELISA and immunolocalization of GR,11βHSD-1 and 2 which influence glucocorticoid’s activity in cervix was assayed by immunohistochemistry.The results suggested that the levels of serum corticosterone were significantly increased before the onset of labor,reached the maximum during delivery(P<0.01).In addition,the 11βHSD-1,11βHSD-2 and GR protein were localized to the nuclei of cervical luminal epithelia,stromal cells,vascular and cervical smooth muscles.The quotient between mean optical density of 11βHSD-1 and 2 is highest at parturition.Furthermore,the immunoreactivity of GR also reached the peak at parturition(P<0.01).These results revealed that 11βHSD-1-regenerated glucocorticoids may act via its receptor to play an important role in the final cervical ripening.

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