title: Epigallocatechin-3-gallate suppresses TNF-alpha -induced production of MMP-1 and -3 in rheumatoid arthritis synovial fibroblasts.
abstract: Rheumatoid arthritis (RA) synovial fibroblasts produce matrix metaloproteinases (MMPs), which destroy cartilage and bone in RA joint. Tumor necrosis factor-alpha (TNF-alpha) is one of the most important mediator leading to MMP production in RA synovial fibroblasts. Here we show that epigallocatechin-3-Gallate (EGCG) suppresses TNF-alpha-induced production of MMP-1 and MMP-3 in RA synovial fibroblasts, which was accompanied by inhibition of mitogen activated protein kinase (MAPK) and activator protein-1 (AP-1) pathways. EGCG treatment resulted in dose-dependent inhibition of TNF-alpha-induced production of MMP-1 and MMP-3 at the protein and mRNA levels in RA synovial fibroblast. EGCG treatment also inhibited TNF-alpha-induced phosphorylation of MAPKs, such as ERK1/2, p38, JNK. Electrophoretic mobility shift assay revealed that EGCG inhibits binding of AP-1 proteins to its response elements in synovial fibroblast treated. Thus, EGCG may play a role in regulating inflammation and bone destruction in RA patients.
authors.affiliation: Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, 561-180, Republic of Korea.
authors.forename: Hee-Jin
authors.initials: HJ
authors.lastname: Yun
authors.forename: Wan-Hee
authors.initials: WH
authors.lastname: Yoo
authors.forename: Myung-Kwan
authors.initials: MK
authors.lastname: Han
authors.forename: Young-Rae
authors.initials: YR
authors.lastname: Lee
authors.forename: Jong-Suk
authors.initials: JS
authors.lastname: Kim
authors.forename: Sang-Il
authors.initials: SI
authors.lastname: Lee
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D001172:Arthritis, Rheumatoid / Q000201:enzymology* / Q000473:pathology; D002392:Catechin / Q000031:analogs & derivatives* / Q000494:pharmacology; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D004336:Drug Antagonism; D005347:Fibroblasts / Q000187:drug effects / Q000201:enzymology / Q000473:pathology; D015870:Gene Expression / Q000187:drug effects; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D020781:Matrix Metalloproteinase 1 / Q000235:genetics / Q000378:metabolism*; D019278:Matrix Metalloproteinase 3 / Q000235:genetics / Q000378:metabolism*; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D013583:Synovial Membrane; D018808:Transcription Factor AP-1 / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D012333:RNA, Messenger; D018808:Transcription Factor AP-1; D014409:Tumor Necrosis Factor-alpha; D002392:Catechin; C045651:epigallocatechin gallate; D020928:Mitogen-Activated Protein Kinases; D019278:Matrix Metalloproteinase 3; D020781:Matrix Metalloproteinase 1