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The epithelial–mesenchymal transition (EMT) is a process by which epithelial cells lose their cell polarity and cell–cell adhesion, and gain migratory and invasive properties to become mesenchymal stem cells; these are multipotent stromal cells that can differentiate into a variety of cell types.
SNAI1 and other epithelial-mesenchymal transition (EMT) genes are regulated by several genes and molecules including Wnt and prostaglandins. Wnt3a is a master regulator of paraxial presomatic mesoderm cells (PSM) which differentiate into the musculoskeleton of the trunk and tail.
Unlike epithelial cells – which are stationary and characterized by an apico-basal polarity with binding by a basal lamina, tight junctions, gap junctions, adherent junctions and expression of cell-cell adhesion markers such as E-cadherin, [4] mesenchymal cells do not make mature cell-cell contacts, can invade through the extracellular matrix, and express markers such as vimentin ...
Later in placental development, both interstitial and endovascular EVTs form as underlying progenitor cell column CYTs undergo epithelial to mesenchymal transition (EMT). [11] This cellular process continually occurs as the CYT layer replenishes extravillous trophoblasts.
Neural mesenchyme soon undergoes a mesenchymal–epithelial transition under the influence of WNT6 produced by ectoderm to form somites. [20] These structures will undergo a secondary EMT as the somite tissue migrates later in development to form structural connective tissue such as cartilage and skeletal muscle. [21]
During the epithelial–mesenchymal transition (EMT), the primary mesenchyme cells (PMCs) detach from the epithelium and become internalized mesenchyme cells that can migrate freely. [ 1 ] While the mechanisms of ingression are not fully understood, studies using the sea urchin as a model organism have begun to shed light on this developmental ...
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The miR-200 family is believed to play an essential role in tumor suppression by inhibiting epithelial-mesenchymal transition (EMT), the initiating step of metastasis (Korpal). EMT occurs as part of embryonic development, and shares many similarities with cancer progression. During EMT, cells lose adhesion and increase in motility.
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