CDKN2A inhibits formation of homotypic cell-in-cell structures.

CDKN2A inhibits formation of homotypic cell-in-cell structures.
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CDKN2A 抑制同型细胞内结构的形成

DOI:
10.1038/s41389-018-0056-4
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发表时间:
2018-06-05
期刊:
影响因子:
6.2
通讯作者:
Sun Q
Sun Q
中科院分区:
医学1区
文献类型:
--
作者:
Liang J;Fan J;Wang M;Niu Z;Zhang Z;Yuan L;Tai Y;Chen Z;Song S;Wang X;Liu X;Huang H;Sun Q

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细胞内(CIC)结构的特征是一个或多个细胞包围在另一个细胞内,在人类癌症中被广泛记录。尽管在 CDKN2A 失活的癌症中发现 CIC 形成增加,但它们之间的因果关系仍有待确定。我们在此报道,抑制CDKN2A表达可有效促进同型CIC形成,而CDKN2A基因编码的两种蛋白p16INK4a或p14ARF的异位过度表达可显着抑制MCF7细胞中CIC的形成。 CDKN2A 对 CIC 形成的调节与 E-钙粘蛋白的亚细胞重新分布、F-肌动蛋白重排和肌球蛋白轻链 2 (p-MLC2) 磷酸化减少密切相关,与此一致,CDKN2A 表达在竞争测定中赋予细胞获胜者/外部身份。此外,CIC 的形成与人类乳腺癌中 p16INK4a 的表达呈负相关。因此,我们的工作将 CDKN2A 确定为第一个肿瘤抑制因子,其失活可促进人类癌细胞中同型 CIC 的形成。
Cell-in-cell (CIC) structures, characterized by enclosure of one or more cells within another cell, were extensively documented in human cancers. Although elevated CIC formation was found in cancers with CDKN2A inactivation, a causal link between them remains to be established. We reported here that inhibiting CDKN2A expression effectively promoted homotypic CIC formation, whereas ectopic overexpression of p16INK4a or p14ARF, two proteins encoded by CDKN2A gene, significantly suppressed CIC formation in MCF7 cells. The regulation of CIC formation by CDKN2A was tightly correlated with subcellular redistribution of E-cadherin, F-actin rearrangement and reduced phosphorylation of myosin light chain 2 (p-MLC2), consistent with which, CDKN2A expression imparted cells winner/outer identity in competition assay. Moreover, CIC formation negatively correlates with p16INK4a expression in human breast cancers. Thus, our work identifies CDKN2A as the first tumor suppressor whose inactivation promotes homotypic CIC formation in human cancer cells.
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发表时间: 2013-12
影响因子: 3.3
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Krajcovic M;Krishna S;Akkari L;Joyce JA;Overholtzer M
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发表时间: 2017-10-02
期刊: The Journal of cell biology
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DOI: 10.1080/23723556.2014.1002707
发表时间: 2015-10
影响因子: 2.1
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DOI: 10.2174/1566524015666151026105123
发表时间: 2015-01-01
影响因子: 2.5
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