MSH2 dysregulation is triggered by proinflammatory cytokine stimulation and is associated with liver cancer development

Yuji Eso, Atsushi Takai, Tomonori Matsumoto, Tadashi Inuzuka, Takahiro Horie, Koh Ono, Shinji Uemoto, Kyeryoung Lee, Winfried Edelmann, Tsutomu Chiba, Hiroyuki Marusawa

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Inflammation predisposes to tumorigenesis in various organs by potentiating a susceptibility to genetic aberrations. The mechanism underlying the enhanced genetic instability through chronic inflammation, however, is not clear. Here, we demonstrated that TNFα stimulation induced transcriptional downregulation of MSH2, a member of the mismatch repair family, via NF-κB- dependent miR-21 expression in hepatocytes. Liver cancers developed in ALB-MSH2-/- AID+, ALB-MSH2-/-, and ALB-AID+ mice, in which MSH2 is deficient and/or activation-induced cytidine deaminase (AICDA) is expressed in cells with albumin-producing hepatocytes. The mutation signatures in the tumors developed in these models, especially ALB-MSH2-/- AID+ mice, closely resembled those of human hepatocellular carcinoma. Our findings demonstrated that inflammation-mediated dysregulation of MSH2 may be a mechanism of genetic alterations during hepatocarcinogenesis.

Original languageEnglish (US)
Pages (from-to)4383-4393
Number of pages11
JournalCancer research
Volume76
Issue number15
DOIs
StatePublished - Aug 1 2016

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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