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Updated: Feb 10, 2026

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
Published on: December 19, 2018
Estrogen receptor, progesterone receptor and CD8+ expression in endometrium of women of unexplained infertility
Shilpi Gupta Dixit1, Surajit Ghatak1, Pratibha Singh2
1Department of Anatomy, All India Institute of Medical Sciences, Jodhpur 342005, India.
Objective:
The present study aimed to investigate the changes of endometrial progesterone and estrogen receptors in luteal phase biopsy specimens of infertile women and find a correlation, if any, between these and CD8+ receptors in the same.
Methods:
The study was conducted on luteal phase endometrial biopsy specimens of 30 women of unexplained infertility and 15 age matched controls. Paraffin sections were first H & E stained. A standardized immunohistochemical protocol was then used to localize the estrogen, progesterone and CD8+ receptors in these samples that were expressed as percentage positivity. Unpaired T test was applied between the controls and cases both for epithelial and stromal cells. The data was also analyzed for correlation in cases for the positivity of CD8+ Cells with that of ER and PR.
Results:
The positivity of estrogen receptors (ER) in stromal cells was significantly lower (p<0.001) in the infertile women when compared to controls and in both the epithelial and stromal cells for progesterone receptors (p<0.001). The results were non significant for CD8+ cells (p=0.19) and also showed no significant correlation in the positivity of CD8+ cells with that of ER and PR.
Conclusions:
The development of molecular probe like ER and PR positivity in endometrial epithelial and stromal cells allows a new approach to be made to the characterization of normal and defective endometrial function.
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