title: Co-treatment with hepatocyte growth factor and TGF-beta1 enhances migration of HaCaT cells through NADPH oxidase-dependent ROS generation.
abstract: Wound healing requires re-epithelialization from the wound margin through keratinocyte proliferation and migration, and some growth factors are known to influence this process. In the present study, we found that the co-treatment with hepatocyte growth factor (HGF) and TGF-beta1 resulted in enhanced migration of HaCaT cells compared with either growth factor alone, and that N-acetylcysteine, an antioxidant agent, was the most effective among several inhibitors tested, suggesting the involvement of reactive oxygen species (ROS). Fluorescence-activated cell sorter analysis using 2,7-dichlorofluorescein diacetate (DCF-DA) dye showed an early (30 min) as well as a late (24 h) increase of ROS after scratch, and the increase was more prominent with the growth factor treatment. Diphenyliodonium (DPI), a potent inhibitor of NADPH oxidase, abolished the increase of ROS at 30 min, followed by the inhibition of migration, but not the late time event. More precisely, gene knockdown by shRNA for either Nox-1 or Nox-4 isozyme of gp91phox subunit of NADPH oxidase abolished both the early time ROS production and migration. However, HaCaT cell migration was not enhanced by treatment with H((2))O((2)). Collectively, co-treatment with HGF and TGF-beta1 enhances keratinocyte migration, accompanied with ROS generation through NADPH oxidase, involving Nox-1 and Nox-4 isozymes.
authors.affiliation: Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon 443-721, Korea.
authors.forename: Hyun-Ja
authors.initials: HJ
authors.lastname: Nam
authors.forename: Yun-Yeon
authors.initials: YY
authors.lastname: Park
authors.forename: Gyesoon
authors.initials: G
authors.lastname: Yoon
authors.forename: Hyeseong
authors.initials: H
authors.lastname: Cho
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Lee
mesh_terms: D001713:Biphenyl Compounds / Q000494:pharmacology; D002465:Cell Movement / Q000187:drug effects*; D004848:Epithelium / Q000187:drug effects / Q000201:enzymology; D055785:Gene Knockdown Techniques; D017228:Hepatocyte Growth Factor / Q000494:pharmacology*; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology; D007527:Isoenzymes / Q000378:metabolism; D015603:Keratinocytes / Q000166:cytology* / Q000187:drug effects / Q000201:enzymology*; D000074624:NADPH Oxidase 1; D000074663:NADPH Oxidase 4; D019255:NADPH Oxidases / Q000378:metabolism*; D009861:Onium Compounds / Q000494:pharmacology; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism; D021122:Protein Subunits / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects; D013997:Time Factors; D053773:Transforming Growth Factor beta1 / Q000494:pharmacology*
chemical_list: D001713:Biphenyl Compounds; D007527:Isoenzymes; D009861:Onium Compounds; D021122:Protein Subunits; D017382:Reactive Oxygen Species; D053773:Transforming Growth Factor beta1; C031291:diphenyliodonium; D017228:Hepatocyte Growth Factor; D006861:Hydrogen Peroxide; D000074624:NADPH Oxidase 1; D000074663:NADPH Oxidase 4; D019255:NADPH Oxidases; C402799:NOX1 protein, human; C498910:NOX4 protein, human; D019869:Phosphatidylinositol 3-Kinases