Reactive oxygen species and NADPH oxidase 4 induced by transforming growth factor β1 are the therapeutic targets of polyenylphosphatidylcholine in the suppression of human hepatic stellate cell activation

  • Remina Ikeda
  • , Kyoko Ishii
  • , Yoshiko Hoshikawa
  • , Junya Azumi
  • , Yuta Arakaki
  • , Toshihiro Yasui
  • , Shizuka Matsuura
  • , Yoshiaki Matsumi
  • , Yohei Kono
  • , Yusuke Mizuta
  • , Akihiro Kurimasa
  • , Ichiro Hisatome
  • , Scott L. Friedman
  • , Hironaka Kawasaki
  • , Goshi Shiota

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Objective and design: To clarify the molecular mechanism of polyenylphosphatidylcholine (PPC), we examined the involvement of reactive oxygen species (ROS) and NADPH oxidase 4 (Nox4) in human hepatic stellate cells (HSCs). Material: Using human LX-2 HSC cells, we examined the effects of PPC on expression of α-smooth muscle actin (α-SMA) and collagen 1, generation of ROS, Nox4 expression, p38 activation and cell proliferation, induced by transforming growth factor β1 (TGFβ1). Results: PPC suppressed ROS which are induced by TGFβ1, phosphorylation of p38MAPK, and expression levels of α-SMA and collagen 1 in a dose-dependent manner. Higher concentrations of PPC also suppressed Nox4 levels. Conclusion: These results suggest that ROS and Nox4 induced by TGFβ1 are the therapeutic targets of PPC in the suppression of human hepatic stellate cell activation.

Original languageEnglish
Pages (from-to)597-604
Number of pages8
JournalInflammation Research
Volume60
Issue number6
DOIs
StatePublished - Jun 2011

Keywords

  • Hepatic stellate cells
  • NADPH oxidase 4
  • Oxidative stress
  • Polyenylphosphatidylcholine

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