Journal
JOURNAL OF CELL SCIENCE
Volume 130, Issue 1, Pages 15-22Publisher
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jcs.175943
Keywords
Adhesion; Blastocyst; Endometrium; Epithelium; Trophoblast
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Funding
- WellBeing of Women [RG1442]
- Diabetes UK [15/0005207]
- Wellbeing of Women [RG1442] Funding Source: researchfish
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At implantation, with the acquisition of a receptive phenotype in the uterine epithelium, an initial tenuous attachment of embryonic trophectoderm initiates reorganisation of epithelial polarity to enable stable embryo attachment and the differentiation of invasive trophoblasts. In this Cell Science at a Glance article, we describe cellular and molecular events during the epithelial phase of implantation in rodent, drawing on morphological studies both in vivo and in vitro, and genetic models. Evidence is emerging for a repertoire of transcription factors downstream of the master steroidal regulators estrogen and progesterone that coordinate alterations in epithelial polarity, delivery of signals to the stroma and epithelial cell death or displacement. We discuss what is known of the cell interactions that occur during implantation, before considering specific adhesion molecules. We compare the rodent data with our much more limited knowledge of the human system, where direct mechanistic evidence is hard to obtain. In the accompanying poster, we represent the embryo-epithelium interactions in humans and laboratory rodents, highlighting similarities and differences, as well as depict some of the key cell biological events that enable interstitial implantation to occur.
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