DLX4 upregulates TWIST and enhances tumor migration, invasion and metastasis.

DLX4 upregulates TWIST and enhances tumor migration, invasion and metastasis.
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DOI:
10.7150/ijbs.4458
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发表时间:
2012
影响因子:
9.2
通讯作者:
Fu J
Fu J
中科院分区:
生物学2区
文献类型:
--
作者:
Zhang L;Yang M;Gan L;He T;Xiao X;Stewart MD;Liu X;Yang L;Zhang T;Zhao Y;Fu J

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无远端同源盒基因 4 (DLX4) 是同源盒基因 DLX 家族的成员。尽管大多数正常成人组织中不存在 DLX4,但 DLX4 在白血病、肺癌、乳腺癌、卵巢癌和前列腺癌中广泛表达。然而,人们对DLX4在肿瘤转移中的作用的分子靶点、机制和途径知之甚少。在这项研究中,我们发现DLX4通过TWIST诱导癌细胞经历上皮间质转化(EMT)。 DLX4 的过度表达增加了癌细胞系中 TWIST 的表达,导致迁移和侵袭能力增加。同样,敲低 DLX4 的表达会降低 TWIST 的表达和癌细胞系的迁移能力。 DLX4 与 TWIST 基因的调控区域结合。 Western blotting和免疫组化染色均显示DLX4和TWIST的表达在大多数乳腺肿瘤中相关。总而言之,来自细胞模型和肿瘤组织的这些数据表明,DLX4 不仅上调 TWIST 表达,而且还诱导 EMT 和肿瘤转移。总之,我们提出了一条DLX4驱动TWIST表达以促进EMT、癌症迁移、侵袭和转移的新途径。
The distal-less homeobox gene 4 (DLX4) is a member of the DLX family of homeobox genes. Although absent from most normal adult tissues, DLX4 is widely expressed in leukemia, lung, breast, ovarian and prostate cancers. However the molecular targets, mechanisms and pathways that mediate the role of DLX4 in tumor metastasis are poorly understood. In this study, we found that DLX4 induces cancer cells to undergo epithelial to mesenchymal transition (EMT) through TWIST. Overexpression of DLX4 increased expression of TWIST expression in cancer cell lines, resulting in increased migratory and invasive capacity. Likewise, knocking down expression of DLX4 decreased TWIST expression and the migration ability of cancer cell lines. DLX4 bound to regulatory regions of the TWIST gene. Both western blotting and immunohistochemistry staining showed that the expression of DLX4 and TWIST are correlated in most of breast tumors. Taken together, these data from both cell models and tumor tissues demonstrate that DLX4 not only upregulates TWIST expression but also induces EMT and tumor metastasis. Altogether, we propose a new pathway in which DLX4 drives expression of TWIST to promote EMT, cancer migration, invasion and metastasis.
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