title: Inhibition of induction of myofibroblasts by interferon gamma in a human fibroblast cell line.
abstract: Interferon gamma (IFNgamma) has been reported as a possible therapeutic agent for contractile diseases in clinical trials and in vitro studies. It is not yet clear, however, whether IFNgamma simply inhibits myofibroblast generation or downregulates alpha smooth muscle actin (alphaSMA) production in myofibroblasts. In this study, we attempted to clarify how IFNgamma acts in the generation of myofibroblasts, and the production of alphaSMA by myofibroblasts, using immunofluorescence staining, cell capture enzyme immunoassay (CC-EIA) and the reverse transcription polymerase chain reaction (RT-PCR) for alphaSMA. We examined whether IFNgamma could block the TGFbeta1-promoted changes in myofibroblasts or the generation of myofibroblasts by TGFbeta1. IFNgamma strongly blocked the generation of myofibroblasts and moderately inhibited the production of alphaSMA in TGFbeta1-promoted myofibrobasts. These findings indicate that IFNgamma may be effective in the early stage of contractile diseases to prevent the progression of contractile lesions.
authors.affiliation: Department of Orthopedic Surgery, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
authors.forename: Kousei
authors.initials: K
authors.lastname: Tanaka
authors.forename: Kouichi
authors.initials: K
authors.lastname: Sano
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Yuba
authors.forename: Kouzo
authors.initials: K
authors.lastname: Katsumura
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakano
authors.forename: Kazunari
authors.initials: K
authors.lastname: Tanaka
authors.forename: Masato
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Tsunehiko
authors.initials: T
authors.lastname: Ikeda
authors.forename: Muneaki
authors.initials: M
authors.lastname: Abe
mesh_terms: D000199:Actins / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line / Q000187:drug effects / Q000378:metabolism; D004387:Dupuytren Contracture / Q000209:etiology; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology*; D032446:Myoblasts / Q000166:cytology*; D012333:RNA, Messenger / Q000096:biosynthesis; D016212:Transforming Growth Factor beta / Q000494:pharmacology; D053773:Transforming Growth Factor beta1
chemical_list: D000199:Actins; D012333:RNA, Messenger; C508960:TGFB1 protein, human; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D007371:Interferon-gamma