title: Soluble tumour necrosis factor receptors in synovial fluids from temporomandibular joints with painful anterior disc displacement without reduction and osteoarthritis.
abstract: The objective of this study was to detect soluble-form tumour necrosis factor receptors (sTNFRs) in temporomandibular joint (TMJ) synovial fluid aspirates, and to compare the sTNFR concentrations between painful anterior disc displacement without reduction and osteoarthritis (ADDwoR/OA) and asymptomatic TMJs. Synovial fluid was sampled from the superior TMJ cavity of 11 painful ADDwoR/OA cases (mean age: 36.9 years) and 10 asymptomatic females (mean age: 24.7 years) by diluted aspiration. The concentrations of sTNFR-I and -II in the synovial fluid were measured using human sTNFR-I and -II enzyme-linked immunosorbent assays. The total protein concentrations in synovial fluids were measured using a bicinchoninic acid protein assay kit. All data were normalised to the total protein concentration of each sample.Two-way factorial analysis of variance and post hoc multiple comparison revealed that: (1). mean normalised sTNFR-I and -II concentrations were higher in TMJ synovial aspirates from ADDwoR/OA patients than from healthy controls; (2). in the ADDwoR/OA patients and the healthy controls, the sTNFR-I concentration in TMJ synovial aspirates was higher than the sTNFR-II concentration; and (3). high TMJ synovial aspirate sTNFR-II seemed to be associated with less TMJ pain and a less restricted range of mouth opening in the ADDwoR/OA patients. The concentrations of sTNFRs in TMJ synovial fluid are higher in the presence of painful ADDwoR/OA, which could modulate intracapsular inflammation.
authors.affiliation: Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8525, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Uehara
authors.forename: Takuo
authors.initials: T
authors.lastname: Kuboki
authors.forename: Takuo
authors.initials: T
authors.lastname: Fujisawa
authors.forename: Shunji
authors.initials: S
authors.lastname: Kojima
authors.forename: Kenji
authors.initials: K
authors.lastname: Maekawa
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yatani
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008875:Middle Aged; D010003:Osteoarthritis / Q000378:metabolism*; D018124:Receptors, Tumor Necrosis Factor / Q000032:analysis*; D012720:Severity of Illness Index; D013582:Synovial Fluid / Q000737:chemistry*; D013704:Temporomandibular Joint / Q000737:chemistry*; D019224:Temporomandibular Joint Disc / Q000737:chemistry; D013705:Temporomandibular Joint Disorders / Q000378:metabolism*; D014056:Tomography, X-Ray / Q000379:methods
chemical_list: D018124:Receptors, Tumor Necrosis Factor