High Keratin 8/18 Ratio Predicts Aggressive Hepatocellular Cancer Phenotype.

High Keratin 8/18 Ratio Predicts Aggressive Hepatocellular Cancer Phenotype.
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DOI:
10.1016/j.tranon.2018.10.010
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发表时间:
2019-03
影响因子:
5
通讯作者:
Haybaeck J
Haybaeck J
中科院分区:
医学3区
文献类型:
--
作者:
Golob-Schwarzl N;Bettermann K;Mehta AK;Kessler SM;Unterluggauer J;Krassnig S;Kojima K;Chen X;Hoshida Y;Bardeesy NM;Müller H;Svendova V;Schimek MG;Diwoky C;Lipfert A;Mahajan V;Stumptner C;Thüringer A;Fröhlich LF;Stojakovic T;Nilsson KPR;Kolbe T;Rülicke T;Magin TM;Strnad P;Kiemer AK;Moriggl R;Haybaeck J

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背景与目的:脂肪性肝炎(SH)和SH相关的肝细胞癌(HCC)具有相当大的临床意义。 SH 的形态学特征为脂肪变性、肝细胞膨胀、细胞质聚集(称为 Mallory-Denk 小体 (MDB))、炎症和晚期纤维化。角蛋白细胞骨架的紊乱和角蛋白 (KRT) 的聚集对于 MDB 的形成至关重要。方法:我们分析了老年 Krt18−/− 小鼠的肝脏,这些小鼠在大多数 SH 相关 HCC 病例中自发发育,与性别无关。有趣的是,积累 KRT8 的 Krt18−/− 小鼠的肝脏脂质谱与人类 SH 脂质谱非常相似,并且表明 KRT8 相对于 KRT18 的过量决定了发展与脂肪生成增强相关的 SH 相关 HCC 的可能性。结果:我们对具有 26 种人类肝癌细胞系的 Krt18−/− 小鼠的遗传图谱以及超过 300 名 HCC 患者的数据集进行了分析,其中 Krt18−/− 基因特征与人类 HCC 相匹配。有趣的是,高 KRT8/18 比率与侵袭性 HCC 表型相关。结论:我们可以证明中间丝及其结合伙伴与肝脏脂质代谢和肝癌发生密切相关。我们建议 KRT8/18 比率作为 HCC 的新型 HCC 生物标志物。
BACKGROUND & AIMS: Steatohepatitis (SH) and SH-associated hepatocellular carcinoma (HCC) are of considerable clinical significance. SH is morphologically characterized by steatosis, liver cell ballooning, cytoplasmic aggregates termed Mallory-Denk bodies (MDBs), inflammation, and fibrosis at late stage. Disturbance of the keratin cytoskeleton and aggregation of keratins (KRTs) are essential for MDB formation. METHODS: We analyzed livers of aged Krt18−/− mice that spontaneously developed in the majority of cases SH-associated HCC independent of sex. Interestingly, the hepatic lipid profile in Krt18−/− mice, which accumulate KRT8, closely resembles human SH lipid profiles and shows that the excess of KRT8 over KRT18 determines the likelihood to develop SH-associated HCC linked with enhanced lipogenesis. RESULTS: Our analysis of the genetic profile of Krt18−/− mice with 26 human hepatoma cell lines and with data sets of >300 patients with HCC, where Krt18−/− gene signatures matched human HCC. Interestingly, a high KRT8/18 ratio is associated with an aggressive HCC phenotype. CONCLUSIONS: We can prove that intermediate filaments and their binding partners are tightly linked to hepatic lipid metabolism and to hepatocarcinogenesis. We suggest KRT8/18 ratio as a novel HCC biomarker for HCC.
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