IRX5 promotes NF-κB signalling to increase proliferation, migration and invasion via OPN in tongue squamous cell carcinoma.

IRX5 promotes NF-κB signalling to increase proliferation, migration and invasion via OPN in tongue squamous cell carcinoma.
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IRX5 通过 OPN 促进舌鳞状细胞癌中 NF-κ B 信号传导以增加增殖、迁移和侵袭

DOI:
10.1111/jcmm.13664
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发表时间:
2018-08
影响因子:
5.3
通讯作者:
Huang C
Huang C
中科院分区:
医学2区
文献类型:
--
作者:
Huang L;Song F;Sun H;Zhang L;Huang C

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Iroquois同源盒基因5(Irx 5)是Iroquois同源盒基因家族中高度保守的成员。该家族的成员在正常胚胎细胞模式和恶性肿瘤的发展中发挥着独特且重叠的作用。在这项研究中,我们观察到IRX 5在舌鳞状细胞癌(TSCC)组织和细胞系中异常丰富。我们使用获得和丧失功能的方法来过表达和敲低TSCC细胞系CAL 27中的IRX 5表达。我们的研究结果表明,IRX 5水平升高促进TSCC细胞的增殖,迁移和侵袭,而稳定或短暂敲低IRX 5表达抑制TSCC细胞的增殖,迁移和侵袭。作为一种转录因子,IRX 5通过靶向骨桥蛋白(OPN)启动子并激活NF-κB通路来实现这一功能。最后,在异种移植肿瘤模型中的研究表明,IRX 5显著增强OPN表达并促进肿瘤生长。综上所述,我们的研究阐明了IRX 5通过与OPN的联系在TSCC中的促进作用。这些发现揭示了TSCC发生的新的分子机制,有望成为TSCC分子治疗的新靶点。
Iroquois homeobox gene 5 (Irx5) is a highly conserved member of the Iroquois homeobox gene family. Members of this family play distinct and overlapping roles in normal embryonic cell patterning and development of malignancies. In this study, we observed that IRX5 was abnormally abundant in tongue squamous cell carcinoma (TSCC) tissues and cell lines. We used gain‐ and loss‐of‐function methods to overexpress and knockdown IRX5 expression in the TSCC cell line CAL27. Our results elucidated that elevated levels of IRX5 promoted proliferation, migration and invasion of TSCC cells, whereas stable or transient knockdown of IRX5 expression suppressed TSCC cell proliferation, migration and invasion. As a transcription factor, IRX5 performed this function by targeting osteopontin (OPN) promoter and activating the NF‐κB pathway. Finally, studies in xenograft tumour model showed that IRX5 significantly enhanced OPN expression and promoted tumour growth. Taken together, our study elucidates a promotive effect of IRX5 in TSCC through the connection with OPN. These findings reveal the new molecular mechanism of TSCC, which may potentiate its use as a novel molecular therapy target for TSCC.
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