title: Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonist inhibits transforming growth factor-beta1 and matrix production in human dermal fibroblasts.
abstract: Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonists are increasingly used in patients with diabetes, and some studies have suggested a beneficial effect on organ fibrosis, but their effects on dermal cell growth and extracellular matrix (ECM) turnover are unknown. To investigate the effect of the PPAR-gamma agonist troglitazone on cell growth and matrix production in human dermal fibroblasts (HDF), HDF were cultured and grown in a different concentration of troglitazone. PPAR-gamma expression and matrix production were measured in HDF in the presence of troglitazone. The mRNA expressions of TGF-beta1, collagen I (Col I) and fibronectin (FN) were determined by quantitative real-time reverse transcription polymerase chain reaction (RT-PCR). The protein of transforming growth factor-beta1 (TGF-beta1) was determined by enzyme-linked immunosorbent assay (ELISA) and proteins of Col I and FN were determined by Western blotting. The mRNA expression of TGF-beta1, Col I and FN were significantly decreased in HDF in 15-30 micromol l(-1) troglitazone compared to the control group with Dulbecco's modified Eagle's medium (P<0.01). An obvious decrease of TGF-beta1 protein was found in troglitazone-treated groups as compared to the control group (P<0.05). Exposure of HDF to troglitazone reduced col I secretion (P<0.05), and fibronectin secretion (P<0.05). This study suggests that PPAR-gamma agonist will provide a novel approach with therapeutic potential in dermal fibrosis, such as hypertrophic scar, keloid and so on.
authors.affiliation: Department of Hand and Plastic Surgery, The second Affiliated Hospital of Wenzhou Medical College, Xueyuan West Road 109#, Wenzhou 325027, Zhejiang Province, PR China.
authors.forename: Guo-You
authors.initials: GY
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Cheng
authors.forename: Ming-Hua
authors.initials: MH
authors.lastname: Zheng
authors.forename: Cheng-Gang
authors.initials: CG
authors.lastname: Yi
authors.forename: Hua
authors.initials: H
authors.lastname: Pan
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Li
authors.forename: Xing-Long
authors.initials: XL
authors.lastname: Chen
authors.forename: Qing
authors.initials: Q
authors.lastname: Yu
authors.forename: Liang-Fu
authors.initials: LF
authors.lastname: Jiang
authors.forename: Fei-Ya
authors.initials: FY
authors.lastname: Zhou
authors.forename: Xiao-Yang
authors.initials: XY
authors.lastname: Li
authors.forename: Jing-Quan
authors.initials: JQ
authors.lastname: Yang
authors.forename: Ting-Gang
authors.initials: TG
authors.lastname: Chu
authors.forename: Wei-Yang
authors.initials: WY
authors.lastname: Gao
mesh_terms: D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D002839:Chromans / Q000494:pharmacology*; D024042:Collagen Type I / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005109:Extracellular Matrix / Q000378:metabolism*; D005347:Fibroblasts / Q000378:metabolism*; D005353:Fibronectins / Q000378:metabolism; D006801:Humans; D007004:Hypoglycemic Agents / Q000494:pharmacology*; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D047495:PPAR gamma / Q000819:agonists* / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012867:Skin / Q000166:cytology*; D045162:Thiazolidinediones / Q000494:pharmacology*; D053773:Transforming Growth Factor beta1 / Q000378:metabolism*; D000077288:Troglitazone
chemical_list: D002839:Chromans; D024042:Collagen Type I; D005353:Fibronectins; D007004:Hypoglycemic Agents; D047495:PPAR gamma; D012333:RNA, Messenger; D045162:Thiazolidinediones; D053773:Transforming Growth Factor beta1; D007770:L-Lactate Dehydrogenase; D000077288:Troglitazone