This thesis discusses several aspects of therapeutic interventions for arthritis of the knee, especially arthroscopic lavage. Arthroscopic lavage is a technique in which the inflamed knee of the patient is rinced with saline. After the procedure corticosteroids can be administered to suppress inflammation. Arthroscopic lavage was superior in suppressing recurrence of arthritis compared to standard joint injections with corticosteroids. The occurence of fibrosis in the inflamed joint was predictive of an inferior response. During arthroscopic lavage synovial tissue samples can be obtained. These biopsies were studied before and after treatment with anti-TNF in longstanding and early (therapy-naieve) Rheumatoid Arthritis (RA)patients. The clinical and synovial effect were comparable between both groups. In the latter part differences in synovial inflamation between RA patients with and without antibodies against cyclic citrullinated peptides (CCP) are discussed in relation to the occurence of joint damage. In anti-CCP positive patients we found more infiltrating lymphocytes leading to progression of joint damage. Also, temporal changes in synovial inflammation differed between anti-CCP positive and anti_CCP negative RA, underlining the fenotypical differences betwen both disease entities.Dutch arthritis foundation Wyeth Inc. Abbott Inc. Schering-Plough Inc.UBL - phd migration 201
