title: Effect of recombinant canine interferon-γ on granulocyte-macrophage colony-stimulating factor, transforming growth factor-β and CC chemokine ligand 17 mRNA transcription in a canine keratinocyte cell line (CPEK).
abstract: Recombinant canine interferon-γ (rCaIFN-γ) produced by a baculovirus expression system has therapeutic efficacy against atopic dermatitis in dogs. Although the mechanism of action of rCaIFN-γ is not completely understood, rCaIFN-γ is thought to downregulate the activity of interleukin-4- and interleukin-5-producing T helper 2 cells. However, rCaIFN-γ may also act directly on canine keratinocytes by inhibiting the release of inflammatory mediators. In this study, we investigated the effects of rCaIFN-γ on cytokine and chemokine mRNA transcription in a canine keratinocyte cell line, CPEK. It was found that granulocyte-macrophage colony-stimulating factor (GM-CSF) mRNA transcription was significantly inhibited after treatment with rCaIFN-γ (P<0.001), whereas transforming growth factor-β and CC chemokine ligand 17 mRNA levels were unchanged. This study suggests that rCaIFN-γ may suppress GM-CSF production from canine keratinocytes, although further studies are required to confirm this.
authors.affiliation: The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan.
authors.forename: Sanae
authors.initials: S
authors.lastname: Shibata
authors.forename: Sadatoshi
authors.initials: S
authors.lastname: Maeda
authors.forename: Naho
authors.initials: N
authors.lastname: Kondo
authors.forename: Akiko
authors.initials: A
authors.lastname: Inoue
authors.forename: Shingo
authors.initials: S
authors.lastname: Maeda
authors.forename: Naoki
authors.initials: N
authors.lastname: Chimura
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Fukata
mesh_terms: D000818:Animals; D002460:Cell Line; D054414:Chemokine CCL17 / Q000235:genetics / Q000378:metabolism*; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D005786:Gene Expression Regulation / Q000187:drug effects; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000235:genetics / Q000378:metabolism*; D007371:Interferon-gamma / Q000494:pharmacology*; D015603:Keratinocytes / Q000187:drug effects* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta / Q000235:genetics / Q000378:metabolism*
chemical_list: D054414:Chemokine CCL17; D012333:RNA, Messenger; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta; D007371:Interferon-gamma; D016178:Granulocyte-Macrophage Colony-Stimulating Factor