Journal Article


Cliona O'Farrelly
Mary Wingfield
Uma Thiruchelvam



women stem cells human endometrium embryo implantation flow cytometry progenitor cells stem cell protein array analysis

Increased uNK Progenitor Cells in Women With Endometriosis and Infertility are Associated With Low Levels of Endometrial Stem Cell Factor. (2015)

Abstract Uterine natural killer (uNK) cells play a significant role in successful human pregnancy. Having previously demonstrated uNK cell progenitors in human endometrium, we hypothesized that abnormal uNK cell maturation contributes to infertility in women with endometriosis. We aimed to characterize uNK cells at different developmental stages in women with and without endometriosis and to investigate possible mechanisms to explain any differences. We characterized uNK cell development in women with and without endometriosis using flow cytometry, protein array and in vitro experiments. We found increased proportions of uNK cells at developmental stages 1 and 2 in endometrium from women with endometriosis (n = 36; mean = 21.2%) when compared with healthy fertile women (n = 9; mean = 7.0%). Protein array analysis revealed significantly lower levels of stem cell factor (SCF) in the eutopic endometrium of women with endometriosis when compared to healthy women. Addition of SCF to endometrial progenitor cells in vitro restored uNK cell maturation. We have shown that women with endometriosis have low levels of endometrial SCF, which we hypothesize contributes to abnormal maturation of local uNK cell populations. This defect may also compromise embryo implantation and hence contribute to endometriosis-associated infertility. SCF replacement may be a new therapeutic approach.
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Full list of authors on original publication

Cliona O'Farrelly, Mary Wingfield, Uma Thiruchelvam

Experts in our system

Cliona O'Farrelly
Trinity College Dublin
Total Publications: 147
Mary B Wingfield
University College Dublin
Total Publications: 13