title: High DNA-binding activity of transcription factor NF-kappa B in synovial membranes of patients with rheumatoid arthritis.
abstract: Our objective was to clarify the DNA-binding activity of transcription factor NF-kappa B as related to cytokine induction in the synovium of patients with rheumatoid arthritis (RA) and osteoarthritis (OA). Synovial membranes were obtained during arthroplasty of the knee from 7 patients with RA and 4 patients with OA. Nuclear extracts obtained from the synovial membranes were examined by electrophoretic mobility shift assay to determine the DNA-binding activity of NF-kappa B. Markedly high DNA-binding activity of NF-kappa B was detected in the synovial membranes of RA patients, while virtually no activity was observed in those of OA patients. These results suggest that the high induction of NF-kappa B in the nuclear extracts may be relatively specific to synovial membranes in RA. NF-kappa B may regulate the production of cytokines at the site of synovial inflammation.
authors.affiliation: Department of Orthopaedic Surgery, Okayama University Medical School, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Asahara
authors.forename: M
authors.initials: M
authors.lastname: Asanuma
authors.forename: N
authors.initials: N
authors.lastname: Ogawa
authors.forename: S
authors.initials: S
authors.lastname: Nishibayashi
authors.forename: H
authors.initials: H
authors.lastname: Inoue
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000378:metabolism*; D001483:Base Sequence; D004586:Electrophoresis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D016328:NF-kappa B / Q000378:metabolism*; D010003:Osteoarthritis / Q000378:metabolism*; D013583:Synovial Membrane / Q000378:metabolism*
chemical_list: D016328:NF-kappa B