Induction of post-menstrual regeneration by ovarian steroid withdrawal in the functionalis of xenografted human endometrium

Human Reproduction
Pauline CoudyzerEtienne Marbaix

Abstract

Does the endometrial functionalis have the potential to undergo self-renewal after menstruation and how is this process controlled by ovarian steroids? Endometrial xenografts subjected to withdrawal of estradiol and progesterone shrink but also show signs of proliferation and tissue repair; new estradiol supply prevents atrophy but is not sufficient to increase graft volume. Menstruation, i.e. cyclic proteolysis of the extracellular matrix of endometrial functionalis, is induced by a fall in estrogen and progesterone concentration and is followed by tissue regeneration. However, there is debate about whether regenerating cells must originate from the basalis or from stem cells and whether new estrogen supply is required for the early repair concomitant with menstruation. Fragments from human endometrial functionalis (from 24 hysterectomy specimens) were xenografted in ovariectomized SCID mice and submitted to a 4-day estradiol and progesterone withdrawal (to mimic menstruation) followed by re-exposure to estradiol (to mimic the proliferative phase). We measured signs of proliferation and changes in graft volume. Endometrium was collected from spontaneously cycling women. Cell proliferation was examined by immunolabeling Ki-67, ...Continue Reading

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Citations

Feb 8, 2020·Physiological Reviews·Hilary O D CritchleyAlistair R W Williams
Dec 2, 2021·Human Reproduction·Philippe R KoninckxDan C Martin

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