Characterization of HLA-G and Related Immunosuppressive Effects in Human Umbilical Cord Stroma-Derived Stem Cells.

Mesenchymal stem cells (MSCs) and especially those derived from fetal tissues exert a potent immunosuppressive effect that can be enhanced under inflammatory conditions. This study aimed to explore the immunosuppressive properties of human umbilical cord mesenchymal stem cells (HUCMSCs). We found that HLA-G, the nonclassical HLA allele with strong immune-inhibitory properties, was much more expressed on the HUCMSCs than on MSCs of other origins.

Enhanced differentiation and clonogenicity of human endometrial polyp stem cells.

Endometrial polyps arise from endometrial overgrowth and may cause intermenstrual bleeding, irregular bleeding, and menorrhagia. In this study, endometrial polyps were harvested from hysterectomized specimens from 6 female patients not on hormone therapy. Endometrial polyp mesenchymal stem cells (EPMSCs) were isolated and characterized.