Fusobacterium nucleatum promotes colorectal carcinogenesis by modulating E-cadherin/β-catenin signaling via its FadA adhesin.

Fusobacterium nucleatum promotes colorectal carcinogenesis by modulating E-cadherin/β-catenin signaling via its FadA adhesin.
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DOI:
10.1016/j.chom.2013.07.012
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发表时间:
2013-08-14
影响因子:
30.3
通讯作者:
Han YW
Han YW
中科院分区:
医学1区
文献类型:
--
作者:
Rubinstein MR;Wang X;Liu W;Hao Y;Cai G;Han YW

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核梭杆菌(FN)与结直肠癌(CRC)有关,但其因果关系和潜在机制仍未确定。我们证明,FN通过其独特的FADA粘附素黏附、侵袭和诱导致癌和炎症反应来刺激结直肠癌细胞的生长。FADA与E-钙粘蛋白结合,激活β-连环蛋白信号转导,并对炎症反应和致癌反应进行差异性调节。E-钙粘蛋白上的FADA结合位点被定位在11个氨基酸区域。从E-钙粘附素的这一区域衍生的合成肽可以消除FADA诱导的CRC细胞生长,以及致癌和炎症反应。腺瘤和腺癌患者结肠组织中的FADA水平是正常人的10-100倍。FADA在结直肠癌中的表达增加与致癌基因和炎症基因的表达增加有关。这项研究揭示了FN驱动CRC的机制,并将FADA确定为CRC的潜在诊断和治疗靶点。
Fusobacterium nucleatum (Fn) has been associated with colorectal cancer (CRC), but causality and underlying mechanisms remain to be established. We demonstrate that Fn adheres to, invades and induces oncogenic and inflammatory responses to stimulate growth of CRC cells through its unique FadA adhesin. FadA binds to E-cadherin, activates β-catenin signaling, and differentially regulates the inflammatory and oncogenic responses. The FadA-binding site on E-cadherin is mapped to an 11 amino acid region. A synthetic peptide derived from this region of E-cadherin abolishes FadA-induced CRC cell growth, and oncogenic and inflammatory responses. FadA levels in the colon tissue from patients with adenomas and adenocarcinomas is >10–100 times higher compared to normal individuals. The increased FadA expression in CRC correlates with increased expression of oncogenic and inflammatory genes. This study unveils a mechanism by which Fn can drive CRC and identifies FadA as a potential diagnostic and therapeutic target for CRC.
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