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Hepatology:清华大学陈立功课题组报道氨基酸转运蛋白在肝癌发生过程中的重要调节作用

2017-04-10 佚名 生物帮

近日,国际肝病学领域著名学术期刊《Hepatology》在线发表了清华大学药学院陈立功课题组及其合作者题为“A functional mTORC1 signaling is indispensable for c-Myc driven hepatocarcinogenesis”的文章,阐述了氨基酸转运蛋白在肝癌发生过程受原癌基因c-Myc调控进而激活mTORC1信号通路诱导肝癌形成。清华大学生命科

近日,国际肝病学领域著名学术期刊《Hepatology》在线发表了清华大学药学院陈立功课题组及其合作者题为“A functional mTORC1 signaling is indispensable for c-Myc driven hepatocarcinogenesis”的文章,阐述了氨基酸转运蛋白在肝癌发生过程受原癌基因c-Myc调控进而激活mTORC1信号通路诱导肝癌形成。清华大学生命科学院博士生葛梦梦和UCSF刘玭为论文共同第一作者,药学院研究生程丽丽、孙焜和本科生黄越冬为本论文的合作作者,清华大学药学院陈立功研究员以及UCSF Xin Chen教授为论文通讯作者。

Hepatocellular carcinoma (HCC)肝细胞癌是最常见的恶性肿瘤之一。原癌基因c-Myc是引发肝癌主要基因之一,促进细胞恶变,最后导致肿瘤的发生在小鼠肝脏中过表达c-Myc能引起肿瘤的形成,但是c-Myc致癌的分子机制仍然知之甚少。我们发现mTORC1信号通路的激活是c-Myc诱导肝癌形成的必要条件, mTOR 下游效应器真核细胞翻译启始因子4E 结合蛋白1 4EBP1 / eIF4E和核糖体蛋白S6 激酶1 p70S6K 共同调节细胞增殖。氨基酸作为细胞生长和增殖的必要条件,对mTORC1正常发挥功能起着至关作用,转录组学数据分析表明c-Myc能够上调多种氨基酸转运蛋白的表达,如SLC1A5和SLC7A6,它们属于膜转运蛋白的溶质载体(SLC)家族,这些转运蛋白在各种生理和病理过程中具有关键的作用。代谢组学分析表明c-Myc直接上调SLC1A5和SLC7A6,导致肝癌细胞对氨基酸的吸收增加进而激活mTORC1信号通路。在人类HCC标本中,c-Myc的水平和SLC1A5 / SLC7A6表达之间有很大的相关性。总之,这些数据表明在肝癌的治疗过程中,除了靶向mTOR信号通路以外,SLC氨基酸转运蛋白家族也渐渐成为有效的药物的靶标,成为治疗HCC有效选择。

原始出处:

Pin Liu,Mengmeng Ge,Junjie Hu,et al.A functional mTORC1 signaling is indispensable for c-Myc driven hepatocarcinoGENEsis.Hepatology. 2017 Mar 30

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    2018-01-13 yzh409
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    2017-04-12 Jianghuiqin

    肿瘤代谢还是有很多值得研究开发的点~

    0

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    2017-04-12 gwc384
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    2017-04-12 医生2397

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在世界上的很多地方,包括非洲西部以及撒哈拉地区,感染黄曲霉(一种常见真菌)导致80%的肝癌发生。而这种真菌常见于玉米、花生以及其它常见的作物中。如今,来自MIT的研究者们开发出了一种通过对肝脏细胞DNA测序检测这些细胞是否感染黄曲霉菌的方法。检测到如果有特定的突变出现,那么将很有可能面临较大的

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