Role of NF-κB and AP-1 on Helicobater pylori-induced IL-8 expression in AGS cells

Sang Hui Chu, Hyeyoung Kim, Jeong Yeon Seo, Joo Weon Lim, Naofumi Mukaida, Kyung Hwan Kim

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56 Citations (Scopus)

Abstract

Oxygen radicals are important regulators in Helicobacter pylori-induced gastric ulceration and carcinogenesis. IL-8 may be regulated by oxidant-sensitive transcription factors, NF-κB, and AP-1. The present study aims to investigate whether H. pylori-induced IL-8 expression is regulated by NF-κB and AP-1 in gastric epithelial AGS cells and whether this transcriptional regulation of IL-8 is inhibited by N-acetylcysteine (NAC). As a result, H. pylori induced the expression of mRNA and protein for IL-8 via activation of NF-κB and AP-1. NF-κB activation accompanied by a decrease in I-κBα and activated AP-1 complex was a c-jun/c-fos heterodimer in H. pylori-infected AGS cells. NAC inhibited H. pylori-induced activation of transcription factors and IL-8 expression in AGS cells. In conclusion, oxygen radicals induce the activation of NF-κB and AP-1 and IL-8 expression. Antioxidants such as NAC might be useful anti-inflammatory agents by inhibiting activation of transcription factors and decreasing IL-8 production in H. pylori-induced gastric inflammation.

Original languageEnglish
Pages (from-to)257-265
Number of pages9
JournalDigestive diseases and sciences
Volume48
Issue number2
DOIs
Publication statusPublished - 2003 Feb 1

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All Science Journal Classification (ASJC) codes

  • Physiology
  • Gastroenterology

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