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  • Title: Cyclic adenosine 5'-monophosphate in synovial fluid of rheumatoid arthritis and osteoarthritis patients.
    Author: Morovic-Vergles J, Culo MI, Gamulin S, Culo F.
    Journal: Rheumatol Int; 2008 Dec; 29(2):167-71. PubMed ID: 18695981.
    Abstract:
    The relationship between synovial fluid (SF) cAMP level and IL-18 and PGE2 SF levels in rheumatoid arthritis (RA) and osteoarthritis (OA) patients, and between SF cAMP level and disease as well as inflammatory activity in RA were investigated in 17 RA and 19 OA patients. Erythrocyte sedimentation rate (ESR), serum (S) C-reactive protein (CRP) level and SF IL-18 level were higher in RA than in OA patients. SF PGE2 level was similar in both groups. SF cAMP level was higher in OA than in RA patients. In RA patients, SF cAMP level showed negative correlation with Disease Activity Score including a 28-joint count and S CRP, ESR and SF IL-18 level. The results suggest that cAMP promotes anti-inflammatory response in RA and OA patients, which is higher in the latter. Promotion of anti-inflammatory response by cAMP elevating agents might be useful in the treatment of RA.
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