TRAF6 regulates EGF-induced cell transformation and cSCC malignant phenotype through CD147/EGFR.

TRAF6 regulates EGF-induced cell transformation and cSCC malignant phenotype through CD147/EGFR.
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TRAF6通过CD147/EGFR调节EGF诱导的细胞转化和cSCC恶性表型

DOI:
10.1038/s41389-018-0030-1
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发表时间:
2018-02-20
期刊:
影响因子:
6.2
通讯作者:
Peng C
Peng C
中科院分区:
医学1区
文献类型:
--
作者:
Zhang X;Wu L;Xiao T;Tang L;Jia X;Guo Y;Zhang J;Li J;He Y;Su J;Zhao S;Tao J;Zhou J;Chen X;Peng C

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TRAF6是一个众所周知的适配器分子,在TLR/IL-1R相关信号通路中起着关键作用。尽管TRAF6已被证明在各种恶性肿瘤中具有致癌活性,但其细节尚不清楚。在本研究中,我们证明TRAF6通过EGFR促进Ras (G12V)和egf诱导的细胞转化。沉默TRAF6表达可显著下调AP-1活性,以及EGF刺激后MMP-2、9的表达。此外,我们发现TRAF6在皮肤鳞状细胞癌(cSCC)的恶性表型中发挥重要作用,影响细胞的生长和迁移。CD147/Basigin是一种跨膜糖蛋白,属于免疫球蛋白超家族,在肿瘤中过表达并诱导肿瘤发生。我们的研究结果表明,CD147与EGFR和TRAF6形成复合物。TRAF6的敲低破坏了CD147-EGFR复合物,从而诱导EGFR内吞作用。因此,TRAF6可能是cSCC预防或治疗的一个新的分子靶点。
TRAF6, a well-known adapter molecule, plays pivotal role in TLR/IL-1R associated signaling pathway. Although TRAF6 has been shown to have oncogenic activity in various malignant tumors, the details remain unclear. In this study, we demonstrated that TRAF6 facilitates Ras (G12V) and EGF-induced cellular transformation through EGFR. Silencing of TRAF6 expression significantly downregulated AP-1 activity, as well as MMP-2,9 expression after EGF stimulation. Furthermore, we found that TRAF6 plays an essential role in cutaneous squamous cell carcinoma (cSCC) malignant phenotypes, affecting cell growth and migration. CD147/Basigin, a transmembrane glycoprotein belonging to the immunoglobulin superfamily, is over-expressed in tumors and induces tumorigenesis. Our results showed that CD147 formed complex with EGFR and TRAF6. Knockdown of TRAF6 disrupted the CD147-EGFR complex, thereby inducing EGFR endocytosis. Therefore, TRAF6 might be a novel molecular target for cSCC prevention or therapy.
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