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  • Title: Expression of Ly-6A/E in the mouse uterus during implantation period.
    Author: Tatsumi K, Higuchi T, Fujiwara H, Nakayama T, Fujii S, Fujita J.
    Journal: Mol Reprod Dev; 2001 Feb; 58(2):159-65. PubMed ID: 11139227.
    Abstract:
    To investigate the molecular mechanisms of implantation, we constructed a complementary DNA library of mouse uterus enriched with pregnancy-induced genes by subtractive hybridization and polymerase chain reaction. One of the isolated clones was a part of complementary DNA for the Ly-6A/E. Ly-6A/E is reported to be differentially expressed on hematopoietic stem cells and some lymphoid and nonlymphoid tissues, mediate cell-cell adhesion on lymphoid cells, and associate with cell proliferation and angiogenesis of tumor cells. Northern blot, in situ hybridization, and immunohistochemical analyses demonstrated that the Ly-6A/E mRNA and protein were expressed in the endometrial epithelial cells as well as myometrial cells and vascular endothelial cells in the uterus of nonpregnant mouse. The expression was downregulated in luminal epithelial cells during pregnancy days 1-5, while it was upregulated in decidualized stromal cells around the implanted embryo at the time of implantation. The signals were primarily localized in stromal cells at the mesometrial pole on day 9. The increased expression was also observed in stromal cells of the embryo-transferred uterus and artificially-induced deciduoma, indicating that the expression of Ly-6A/E in the endometrial cells is concurrent with decidualization. These findings suggest that Ly-6A/E plays a role in embryo implantation.
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