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Research Article
Xanthine oxidoreductase is present in human synovium.
  1. R E Allen,
  2. J M Outhwaite,
  3. C J Morris,
  4. D R Blake
  1. Rheumatism Research Wing, Medical School, Birmingham.

    Abstract

    It is postulated that the mobile inflamed joint may be subject to cyclical ischaemic reperfusion injury. Xanthine oxidoreductase is an enzyme thought to contribute to oxidative reperfusion injury, and the detection of this activity in human synovium is described. Three normal and five rheumatoid tissues were assayed with a carbon-14 radioassay detecting the conversion of [14C]xanthine to [14C]uric acid. Rheumatoid synovia contained 0.67-305 microU/g tissue (n = 5), while normal synovia contained 1.2-5.0 microU/g tissue (n = 3).

    https://doi.org/10.1136/ard.46.11.843

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