线粒体心磷脂调控肝癌细胞凋亡新机制获揭示

2016-11-22 黄辛 中国科学报

中科

中科院上海生科院营养所尹慧勇研究组发现线粒体特有的磷脂—心磷脂调节肝细胞癌(HCC)凋亡的新机制。相关成果日前在线发表于《自由基生物学与医学》

肝癌位列全球肿瘤疾病致死率第二位。HCC作为原发性肝癌中最主要的一种亚型,其比例占全球肝癌的70%~85%,其中新增肝癌病人的55%在中国。HCC癌细胞具有区别于一般正常肝细胞的特有属性,如抗细胞凋亡、生长信号自给自足及显著激活的增殖、侵袭和转移能力等。近来研究表明肝癌细胞的这些特征与其代谢重构密切相关,其中糖酵解异常和线粒体功能异常相关的分子机制研究较多,而脂代谢重构在HCC发生发展过程中所起的作用还亟待研究。

研究人员发现,线粒体特有的心磷脂代谢变化在HCC发生发展过程中发挥了重要作用。研究发现,癌组织中含量最丰富的心磷脂—四亚油酰心磷脂(TLCL)及其氧化产物均显著下降,同时证明TLCL氧化产生大量的活性脂质亲电体包括4-羟基-壬烯醛(4-HNE)等。通过体外细胞实验证明心磷脂氧化、活性脂质亲电体的形成与细胞凋亡密切相关。

原始出处

Huiqin Zhonga, b, Mengqing Xiaoa, b, h, Kamelija Zarkovicc, Mingjiang Zhua, Rina Saa, b, Jianhong Lua, b, Yongzhen Taoa, Qun Chena, b, Lin Xiaa, Shuqun Chenge, Georg Waegf, Neven Zarkovicg, 1, Huiyong Yina.Mitochondrial Control of Apoptosis through Modulation of Cardiolipin Oxidation in Hepatocellular Carcinoma: A Novel Link between Oxidative Stress and Cancer.Free Radical Biology and Medicine.2016

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    2016-11-24 yxch36
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