Aberrant Expressions Of Endometrial Id3 And Ctla-4 Are Associated With Unexplained Repeated Implantation Failure And Recurrent Miscarriage
AMERICAN JOURNAL OF REPRODUCTIVE IMMUNOLOGY(2017)
Abstract
Inhibitor of DNA-binding protein 3 (Id3) is required for tumor angiogenesis and regulatory T-cell generation. However, the involvement of Id3 in unexplained repeated implantation failure (RIF) and recurrent miscarriage (RM) remains poorly understood. Immunohistochemistry was used to identify Id3, CD34, CTLA-4, and FOXP3 in the endometrium taken from the women with RIF (n=16), RM (n=16) and matched controls (n=8). The images were acquired and analyzed by the Vectra((R)) automated quantitative pathology imaging system. Percentage of Id3(+) cells was significantly higher in the endometrium of women with RIF and RM compared with controls. The numbers of Id3(+) and CD34(+) vessels in the endometrium were positively correlated in control but not in RIF or RM. Percentages of CTLA-4(+) cells, but not FOXP3(+) cells, were significantly increased in the endometrium of RIF and RM women than those in controls. We found aberrant expressions of endometrial Id3 and CTLA-4 in peri-implantation endometrium of women with RIF and RM, suggesting the negative roles of these angiogenesis and immune tolerance markers involving in regulating endometrium receptivity.
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Key words
CD34, cytotoxic T-lymphocyte-associated protein 4 (CTLA-4), forkhead box P3 (FOXP3), inhibitor of DNA-binding protein 3 (Id3), recurrent miscarriage (RM), repeated implantation failure (RIF)
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