A single non-synonymous NCOA5 variation in type 2 diabetic patients with hepatocellular carcinoma impairs the function of NCOA5 in cell cycle regulation.

A single non-synonymous NCOA5 variation in type 2 diabetic patients with hepatocellular carcinoma impairs the function of NCOA5 in cell cycle regulation.
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患有肝细胞癌的 2 型糖尿病患者中的单一非同义 NCOA5 变异会损害 NCOA5 在细胞周期调节中的功能。

DOI:
10.1016/j.canlet.2017.01.028
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发表时间:
2017
期刊:
影响因子:
9.7
通讯作者:
Xiao,Hua
Xiao,Hua
中科院分区:
医学1区
文献类型:
--
作者:
Liu,Xinhui;Liu,Feiye;Gao,Shenglan;Reske,Jake;Li,Aimin;Wu,Chin-Lee;Yang,Chengfeng;Chen,Fengsheng;Luo,Rongcheng;Xiao,Hua

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2型糖尿病(T2 D)是肝细胞癌(HCC)的危险因素。我们之前已经描述过核受体辅激活因子5(NCOA 5)单倍不足是一种将葡萄糖耐受不良与肝癌联系起来的遗传缺陷。在这里,我们报告的识别和表征的一个单核苷酸变异(T445 A)在NCOA 5,导致一个氨基酸的Thr丙氨酸取代,在相邻的非肿瘤性肝组织来自并发肝癌和T2 D患者。通过使用Tet-On诱导表达细胞,我们发现NCOA 5 wt的异位表达通过诱导G2/M期阻滞抑制HCC细胞的增殖,而NCOA 5 T445 A的异位表达与NCOA 5 wt的异位表达相比具有显著较小的效果。此外,异位表达的NCOA 5 wt增加了DNA损伤和细胞衰老的发生,而表达的NCOA 5 T445 A部分失去了这种活性。异种移植肿瘤模型分析表明,异位NCOA 5 wt表达降低HCC肿瘤生长,T445 A变异损害其肿瘤生长抑制功能。总的来说,我们的数据表明,T445 A变异损害了NCOA 5抑制HCC生长的能力,这表明这种变异可能有可能增加HCC与T2 D共病的易感性。
Type 2 Diabetes (T2D) is a risk factor for hepatocellular carcinoma (HCC). We have previously described that haploinsufficiency of nuclear receptor coactivator 5 (NCOA5) is a genetic defect linking glucose intolerance to HCC. Here we report identification and characterization of a single nucleotide variation (T445A) in NCOA5, causing an amino acid Thr to Ala substitution, in adjacent non-tumorous liver tissues derived from patients with concurrent HCC and T2D. By using Tet-On inducible expression cells, we show that ectopic expression of NCOA5wt suppressed proliferation of HCC cells via induction of G2/M arrest, while ectopic expression of NCOA5T445A had a significantly lesser effect compared to ectopic expression of NCOA5wt. Furthermore, ectopic expression of NCOA5wt increased the occurrence of DNA damage and cell senescence, whereas expression of NCOA5T445A partly lost this activity. Xenograft tumor model analysis demonstrated that ectopic NCOA5wt expression reduced HCC tumor growth and the T445A variation impairs its tumor growth inhibitory function. Collectively, our data show that the T445A variation impairs the ability of NCOA5 to inhibit growth of HCC, suggesting that this variation may have potential to increase susceptibility to HCC comorbid with T2D.
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