Linked Life Data

1470605

Source:http://linkedlifedata.com/resource/pubmed/id/1470605

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pubmed-article:1470605pubmed:abstractTextDuring implantation and subsequent placentation the human extravillous trophoblast (EVT) cells invade the endometrium and maternal vasculature within the uterus. The origin of the EVT and signals triggering its differentiation, migration and invasion are poorly understood. First and second trimester human chorionic villi explants were used as a source of EVT and a variety of substrates which resemble extracellular matrix (ECM) in vivo have been tested to induce EVT differentiation and migration. The obtained results demonstrate that villous explants from both 5-7 and 8-10 weeks of gestation give rise to EVT cells in vitro if maintained on the surface of Matrigel or decidual extract supplemented collagen gel. Fetal calf serum (FCS) supplemented media was essential for EVT differentiation and villous trophoblast viability. Immunostaining of both EVT cells and cells from the cytotrophoblastic column with monoclonal antibody Ki67 (cell proliferation marker) indicate that EVT cells differentiate in vitro by proliferation from the tip of anchoring villi. These mononucleated, round-shaped, migrating cells are HLA-A,B,C class I antigen (W6/32) antibody and low molecular weight cytokeratin positive, and do not immunostain with PAI-1 (plasminogen activator inhibitor) and HPL antibodies. Differentiation of EVT was restricted to first trimester villous tissue; explants from second trimester placentae did not give rise to EVT. Tissue viability as monitored by glucose utilization, lactate, progesterone and hCG production rates correlated with EVT differentiation. The production rates for hCG demonstrated significant variation among individual placentae and was maintained constant for 10 days consistently only in explants cultured on decidual extract supplemented collagen matrix. The described villous tissue culture system may be, therefore, a unique in vitro model to study proliferation and differentiation of EVT from cytotrophoblastic columns, the regulation of EVT proliferation and differentiation, the role of ECM in the induction of the migration and the interaction of extravillous and villous trophoblast at the level of the cytotrophoblastic column.lld:pubmed
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pubmed-article:1470605pubmed:authorpubmed-author:MillerR KRKlld:pubmed
pubmed-article:1470605pubmed:authorpubmed-author:SchubachS ASAlld:pubmed
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pubmed-article:1470605pubmed:pagination439-61lld:pubmed
pubmed-article:1470605pubmed:dateRevised2004-11-17lld:pubmed
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pubmed-article:1470605pubmed:articleTitleVillous culture of first trimester human placenta--model to study extravillous trophoblast (EVT) differentiation.lld:pubmed
pubmed-article:1470605pubmed:affiliationINEP, Institute for Application of Nuclear Energy, Beograd, Yugoslavia.lld:pubmed
pubmed-article:1470605pubmed:publicationTypeJournal Articlelld:pubmed
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