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Comparative study of C reactive protein and serum amyloid A protein in experimental inflammation.
  1. R E Chambers,
  2. C W Hutton,
  3. P A Dieppe,
  4. J T Whicher
  1. Department of Chemical Pathology, Bristol Royal Infirmary, United Kingdom.

    Abstract

    The responses of C reactive protein, measured by radial immunodiffusion and radioimmunoassay, and serum amyloid A protein, measured by radial immunodiffusion, were compared in eight subjects with inflammation induced experimentally by intradermal injection of monosodium urate crystals. A significant increase in serum amyloid A was noted after a lag phase of eight hours, the increase in median concentration at 48 hours being about eightfold. A parallel but less marked increase was found in C reactive protein when measured by radioimmunoassay (fourfold increase in median concentration at 48 hours) after a small but significant decrease during the lag phase. The changes in C reactive protein remained within the reference range and were not detectable by radial immunodiffusion.

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