ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (11): 2097-2103.doi: 10.11843/j.issn.0366-6964.2015.11.024

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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

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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