Epithelial cell extrusion requires the sphingosine-1-phosphate receptor 2 pathway.
Epithelial cell extrusion requires the sphingosine-1-phosphate receptor 2 pathway.
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DOI:
10.1083/jcb.201010075
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发表时间:
2011-05-16
期刊:
影响因子:
--
通讯作者:
Rosenblatt J
中科院分区:
文献类型:
--
作者:
Gu Y;Forostyan T;Sabbadini R;Rosenblatt J
Apoptotic epithelial cells signal to neighboring cells to induce dying cell extrusion by releasing sphingosine-1-phosphate. To maintain an intact barrier, epithelia eliminate dying cells by extrusion. During extrusion, a cell destined for apoptosis signals its neighboring cells to form and contract a ring of actin and myosin, which squeezes the dying cell out of the epithelium. Here, we demonstrate that the signal produced by dying cells to initiate this process is sphingosine-1-phosphate (S1P). Decreasing S1P synthesis by inhibiting sphingosine kinase activity or by blocking extracellular S1P access to its receptor prevented apoptotic cell extrusion. Extracellular S1P activates extrusion by binding the S1P2 receptor in the cells neighboring a dying cell, as S1P2 knockdown in these cells or its loss in a zebrafish mutant disrupted cell extrusion. Because live cells can also be extruded, we predict that this S1P pathway may also be important for driving delamination of stem cells during differentiation or invasion of cancer cells.
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DOI:
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发表时间:
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Biochimica et biophysica acta
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