JF Dye
Phenotype of the endothelium in the human term placenta
Dye, JF; Jablenska, R; Donnelly, JL; Lawrence, L; Leach, L; Clark, P; Firth, JA
Authors
R Jablenska
JL Donnelly
L Lawrence
L Leach
P Clark
JA Firth
Abstract
The placental endothelium contributes to regulating transplacental exchange and maintaining the immunological maternofetal barrier. We characterized the endothelial phenotype in human normal term placentae with a panel of antibodies to endothelial antigens using a standardized immunofluorescence method. Placental endothelium strongly expressed vWF, PAL-E, H-antigen, thrombomodulin, PECAM-1, CD34, CD36, ICAM-1, CD44, thy-1, A10/33-1, VE-cadherin, caveolin-1 and HLA-G, whereas occludin, claudin-1, eNOS, angiotensin converting enzyme (ACE), ICAM-2, endoglin and integrin-αθβ3were weakly expressed. PGI2synthase, tissue factor, E-selectin and VCAM-1 were not detected. Some antigens were heterogenously expressed along the vascular tree or within individual villi. Expression of ACE, eNOS, vWF, P-selectin, E-selectin, integrin αvβ3and endoglin was stronger in the maternal decidual vessels, while PECAM-1, CD44, thy-1 and caveolin-1 expression was stronger in fetal vessels. Some endothelial markers were present in trophoblasts and stroma. Endothelial proliferation was apparent in mature intermediate and terminal villi. There was limited inflammatory response to TNFα in explants, characterized by upregulation of vWF, P-selectin, PECAM-1 and CD44, downregulation of thrombomodulin, but no increase in ICAM-1 expression, nor induction of E-selectin, VCAM-1 or tissue factor. These patterns of heterogeneity, proliferative activity and inflammatory activation may underlie the specific physiological roles of the placental endothelium.
Citation
Dye, J., Jablenska, R., Donnelly, J., Lawrence, L., Leach, L., Clark, P., & Firth, J. (2001). Phenotype of the endothelium in the human term placenta. Placenta, 22(1), 32-43. https://doi.org/10.1053/plac.2000.0579
Journal Article Type | Article |
---|---|
Publication Date | Jan 1, 2001 |
Deposit Date | Feb 12, 2009 |
Journal | Placenta |
Print ISSN | 0143-4004 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 22 |
Issue | 1 |
Pages | 32-43 |
DOI | https://doi.org/10.1053/plac.2000.0579 |
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