as in iranian traditional medicine, bee venom (bv) is a promising treatment for the rheumatoid arthritis (ra) which is considered as a problematic human chronic inflammatory disease in the present time. smoking is considered to be a major risk factor in ra onset and severity. the main aim of this study is to investigate the effects of bv on cigarette smoke-induced inflammatory response in fibro...

Human fibroblast-like synoviocytes play a vital role in joint synovial inflammation in rheumatoid arthritis (RA). Proinflammatory cytokines induce fibroblast-like synoviocyte activation and dysfunction. The inflammatory mediator Krüppel-like factor 4 is upregulated during inflammation and plays an important role in endothelial and macrophage activation during inflammation. However, the role of ...

BACKGROUND The effect of platelet-rich plasma on chondrocytes has been studied in cell and tissue culture. Less attention has been given to the effect of platelet-rich plasma on nonchondrocytic cell lineages within synovial joints, such as fibroblast-like synoviocytes, which produce cytokines and matrix metalloproteinases (MMPs) that mediate cartilage catabolism. The purpose of the present stud...

BACKGROUND Expression of signal transducer and activator of transcription 1 (STAT1), the mediator of interferon (IFN) signalling, is raised in synovial tissue (ST) from patients with rheumatoid arthritis (RA). OBJECTIVES To determine the extent to which this pathway is activated by phosphorylation in RA synovium. Additionally, to investigate the cellular basis of STAT1 activation in RA ST. ...

OBJECTIVES Rheumatoid arthritis is characterized by inflammation, hyperplasia of the synovial membrane, pannus formation and degradation of cartilage and bone. Fibroblast-like synoviocytes are thought to be involved in the invasion and subsequent degradation of cartilage. Two processes play a role in cellular invasion: cellular migration and degradation of the extracellular matrix. The adhesion...

A long-standing question in rheumatology is why inflammatory arthritides such as rheumatoid arthritis involve the joints. Many studies have addressed this question; a recent article by Lee et al.1 provides a new answer that is both obvious and intriguing. Rheumatoid arthritis affects the joints because of the essential role of the synovium in regulating inflammation. The normal synovial membran...

UNLABELLED The study of the pathogenetic mechanisms of rheumatic diseases is in general carried out through "in vitro" systems based on cellular cultures models. The difficulties to achieve fresh human tissue prompted us to develop a simpler method to obtain fibroblast-like synovial cells from synovial fluid (SF). METHODS SF was collected from the knees of 5 patients with rheumatoid arthritis...