The expression and function of RASAL2 in renal cell carcinoma angiogenesis.

The expression and function of RASAL2 in renal cell carcinoma angiogenesis.
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RASAL2在肾细胞癌血管生成中的表达及功能

DOI:
10.1038/s41419-018-0898-x
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发表时间:
2018-08-29
影响因子:
9
通讯作者:
Wu K
Wu K
中科院分区:
生物学1区
文献类型:
--
作者:
Hui K;Yue Y;Wu S;Gu Y;Guan B;Wang X;Hsieh JT;Chang LS;He D;Wu K

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肾细胞癌(RCC)患者通常会对抗血管药物产生耐药性并最终死于疾病。然而,潜在的分子机制仍然知之甚少。在这项研究中,我们证明了 RASAL2(一种 RAS GTP 酶激活蛋白)通过靶向肿瘤血管生成在 RCC 中发挥肿瘤抑制作用。首先,我们发现 RASAL2 在 RCC 中经常发生表观遗传学沉默,并且其缺失与 RCC 患者的总生存率呈负相关。此外,我们发现 RASAL2 可以在体外和体内抑制肾细胞癌血管生成。从机制上讲,我们发现 RASAL2 可以通过减少 Ser9 磷酸化来激活 GSK3β,从而降低 c-FOS 和血管内皮生长因子 A (VEGFA) 的表达。用特异性抑制剂或小干扰RNA干扰p-GSK3β/c-FOS通路可以逆转VEGFA的表达,这可能为预防RCC对抗血管治疗产生耐药性提供新的见解。
Patients with renal cell carcinoma (RCC) often develop resistance to antivascular drugs and eventually succumb to disease. However, the underlying molecular mechanism remains poorly understood. In this study, we demonstrated that RASAL2, a RAS GTPase-activating protein, played a tumor-suppressive role in RCC by targeting tumor angiogenesis. Firstly, we showed that RASAL2 was frequently epigenetically silenced in RCC, and its loss was negatively correlated with overall survival of RCC patients. Furthermore, we discovered that RASAL2 could inhibit RCC angiogenesis in vitro and in vivo. Mechanistically, we identified that RASAL2 could activate GSK3β by reducing Ser9 phosphorylation and subsequently decrease the expression of c-FOS and vascular endothelial growth factor A (VEGFA). Interruption of the p-GSK3β/c-FOS pathway with the specific inhibitor or small interfering RNA could reverse the expression of VEGFA, which may provide a new insight to prevent RCC from resistance to antivascular therapy.
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发表时间: 2017-03
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RASAL2 是一种 RAS GTP 酶激活蛋白,通过 MAPK/SOX2 通路抑制膀胱癌的干细胞性和上皮间质转化。
DOI: 10.1038/cddis.2017.9
发表时间: 2017-02-09
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