In this study, we compared the immune cell populations in rheumatoid arthritis (RA) synovial fluid, which shows lymphoid tissue-like structure, with those in tonsils, which are normal secondary lymphoid tissues. Firstly, we found that CD4(-)CD11b(+) macrophages were the major population in RA synovial fluid and that B cells were the major population in tonsils. In addition, synovial fluid from ...

Studies on the synovial fluid lipoproteins were initiated several years ago. In 1953 Ropes and Bauer (1) reported on the cholesterol content of joint fluid from patients with rheumatoid arthritis. Subsequently Schmid and MacNair (2, 3) noted that when referred to the same amount of protein rather than volume of fluid, the lipoprotein content of pathological and pooled postmortem synovial fluids...

OBJECTIVE To investigate the role of CD8 cell subsets in the pathogenesis of rheumatoid arthritis (RA) and the phenotypes of T cells adherent or non-adherent to the target cells (endothelial cells and synovial cells) pre-treated with IL-1 beta. METHODS The expression of S6F1 on CD8 cells and that of an activation marker on CD8 cells and CD8 cell subsets was evaluated in specimens of periphera...

To investigate the value of synovial fluid analysis in predicting the articular evolution of juvenile chronic arthritis, synovial fluid from 29 patients with oligoarticular onset juvenile chronic arthritis were examined prospectively. The patients were subsequently classified after a three year period of observation as having polyarticular (10 patients) or pauciarticular (19 patients) disease. ...

Cartilage destruction is a central pathological feature of osteoarthritis, a leading cause of disability in the US. Cartilage in the adult does not regenerate very efficiently in vivo; and as a result, osteoarthritis leads to irreversible cartilage loss and is accompanied by chronic pain and immobility (1,2). Cartilage tissue engineering offers promising potential to regenerate and restore tiss...

Although a recent study suggested the involvement of RANKL and osteoprotegerin (OPG) in the pathogenesis of bone-destructive disease, no study has focused on the RANKL:OPG ratio in the synovial fluid of patients with temporomandibular joint (TMJ) disorder. This communication reports on the concentrations of RANKL and OPG in synovial fluid from TMJ patients and healthy control individuals. In co...

Whether the levels of procalcitonin (PCT) in the serum and synovial fluid are effective indicators for distinguishing septic arthritis (SA) from non-infectious arthritis remains controversial. The present study aimed to evaluate whether PCT levels in fresh serum or fresh joint fluid may be used in the differential diagnosis of SA from rheumatoid arthritis (RA), osteoarthritis (OA) and gouty art...

1. Plasma fibronectin levels were similar in 60 healthy subjects and 88 with the rheumatoid arthritis. 2. In 42 patients with rheumatoid arthritis synovial fluid fibronectin levels were significantly higher than plasma levels (P less than 0.001). Intermediate fibronectin levels were found in synovial fluid from six patients with psoriatic arthritis, eight patients with osteoarthritis and seven ...

A significant portion of a complement-fixing activity found in the synovial fluid of patients with rheumatoid arthritis, and previously implicated as a possible cause of the low synovial fluid complement levels in these patients behaves as a high solubility cryoprotein. Analysis of rheumatoid synovial fluid cryoproteins has revealed mixed immunoglobulins, bound complement components, fibrinogen...

Examination of the synovial fluid should be a routine procedure in the evaluation of arthritic conditions, as it can provide valuable information in addition to that gained by clinical and radiologic examination. Conventional analysis will not provide a specific diagnosis; however, it does give an indication of the degree of synovitis and metabolic derangement within the joint. It is more speci...