ER stress cooperates with hypernutrition to trigger TNF-dependent spontaneous HCC development.

ER stress cooperates with hypernutrition to trigger TNF-dependent spontaneous HCC development.
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DOI:
10.1016/j.ccr.2014.07.001
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发表时间:
2014-09-08
期刊:
影响因子:
50.3
通讯作者:
Karin M
Karin M
中科院分区:
医学1区
文献类型:
--
作者:
Nakagawa H;Umemura A;Taniguchi K;Font-Burgada J;Dhar D;Ogata H;Zhong Z;Valasek MA;Seki E;Hidalgo J;Koike K;Kaufman RJ;Karin M

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内质网(ER)应激与病毒性肝炎、胰岛素抵抗、脂肪肝和非酒精性脂肪性肝炎(NASH)的发病机制有关,这些疾病增加了肝细胞癌(HCC)的风险。为了确定ER应激是否以及如何促成肥胖驱动的肝肿瘤发生,我们用高脂肪饮食喂养野生型(WT)和MUP-uPA小鼠,其中肝细胞ER应激由纤溶酶原激活物表达诱导。尽管两种品系都具有相同的胰岛素抵抗性,但MUP-uPA小鼠表现出更多的肝损伤、免疫浸润和脂肪生成增加,因此表现出典型的NASH体征并发展为典型的脂肪性肝炎HCC。NASH和HCC的发展都依赖于炎症巨噬细胞产生的TNF,这些炎症巨噬细胞响应于肝细胞ER应激而在MUP-uPA肝脏中积累。
Endoplasmic reticulum (ER) stress has been implicated in the pathogenesis of viral hepatitis, insulin resistance, hepatosteatosis and non-alcoholic steatohepatitis (NASH), disorders that increase risk of hepatocellular carcinoma (HCC). To determine whether and how ER stress contributes to obesity-driven hepatic tumorigenesis we fed wild type (WT) and MUP-uPA mice, in which hepatocyte ER stress is induced by plasminogen activator expression, with high fat diet. Although both strains were equally insulin resistant, the MUP-uPA mice exhibited more liver damage, immune infiltration and increased lipogenesis, and as a result displayed classical NASH signs and developed typical steatohepatitic HCC. Both NASH and HCC development were dependent on TNF produced by inflammatory macrophages that accumulate in the MUP-uPA liver in response to hepatocyte ER stress.
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