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Poly I:C (polyinosinic-polycytidylic acid) stimulated hyaluronic acid production by rheumatoid and non-rheumatoid human synovial fibroblasts. Stimulation was dose dependent and was inhibited by acetylsalicyclic acid and indomethacin. Poly I and Poly C, when separately added, had no stimulatory effect on hyaluronic acid production, and Poly A:U had only a slight effect on this parameter. Cells grown with Poly I:C were virus resistant and interferon was detected in their medium. Human interferon had also a dose-dependent stimulatory effect on hyaluronic acid production by synovial cells. A possible interferon-mediated relationship between virus infection and pathologic accumulation of joint fluid is suggested.
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Yaron et al. (1976) studied this question.
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