期刊
REPRODUCTIVE SCIENCES
卷 19, 期 1, 页码 102-114出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/1933719111414207
关键词
adult stem cells; endometrium; mouse; estrogen; regeneration
资金
- National Health and Medical Research Council (NHMRC) of Australia [545992]
- NHMRC [465121, 490995]
- CASS Foundation
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists
Candidate stem/progenitor cells have been identified in mouse endometrium as label-retaining cells (LRCs). The role of endometrial stem/progenitor cells in initiating estrogen-stimulated endometrial growth in prepubertal and cycling mice was investigated following a single 17 beta-estradiol (E2) injection in bromodeoxyuridine (BrdU)-labeled and -chased (LRC), ovariectomised mice. Proliferating (BrdU(+)/Ki-67(+)) and mitotic (BrdU(+)/PH3(+)) epithelial LRCs were first detected in prepubertal mice 8 hours following E2 treatment, initiating the proliferative response. In contrast, all epithelial LRCs and 16% of epithelial cells in cycling mice proliferated within 2 hours. In cycling mice, 12% of stromal LRCs initiated a proliferative response 8 hours after E2. Proliferating epithelial LRCs and most stromal LRCs (85%) lacked estrogen receptor-alpha (ESR1). These findings suggest that endometrial epithelial LRCs function as stem/progenitor cells by receiving proliferative signals from neighboring ESR1(+) niche cells to initiate the growth of the epithelium during development, while mature epithelial cells may undergo self-replication in cycling endometrium.
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