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Sustained JNK1 activation is associated with altered histone H3 methylations in human liver cancer.

Abstract：

BACKGROUND/AIMS:Aberrant c-Jun N-terminal kinase (JNK) activation has been linked to hepatocellular carcinoma (HCC) in mouse models. It remains unclear whether JNK activation plays an important role in human HCC and, if so, how JNK signaling contributes to the initiation or progression of HCC. METHODS:The JNK activation, global gene expression, and the status of histone H3 methylations were measured in 31 primary human hepatocellular carcinoma (HCC) samples paired with the adjacent non-cancerous (ANC) tissues. RESULTS:Enhanced JNK1 activation was noted in 17 out of 31 HCC samples (55%) relative to the corresponding ANC tissues, whereas JNK2 activation was roughly equal between HCC and ANC tissues. This enhancement in JNK1 activation is associated with an increased tumor size and a lack of encapsulation of the tumors. In addition, an association of JNK1 activation with the histone H3 lysines 4 and 9 tri-methylation was observed in the HCC tissues, which leads to an elevated expression of genes regulating cell growth and a decreased expression of the genes for cell differentiation and the p450 family members in HCC. CONCLUSIONS:These results, thus, suggest that JNK1 plays important roles in the development of human HCC partially through the epigenetic mechanisms.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Chang Q,Zhang Y,Beezhold KJ,Bhatia D,Zhao H,Chen J,Castranova V,Shi X,Chen F

doi

10.1016/j.jhep.2008.07.037

subject

Has Abstract

pub_date

2009-02-01 00:00:00

pages

323-33

issue

2

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(08)00628-4

journal_volume

50

pub_type

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