SERUM AMYLOID P-COMPONENT LEVELS IN AMYLOIDOSIS, CONNECTIVE-TISSUE DISEASES, INFECTION, AND MALIGNANCY AS COMPARED TO NORMAL SERUM

  • 1 January 1979
    • journal article
    • research article
    • Vol. 94  (4) , 633-638
Abstract
A highly sensitive radioimmunoassay was developed to measure the serum levels of SAP [serum P-component]. Sera from 50 normal individuals ranging in age from 4-89 yr had a mean level of 7.47 mg/dl and showed no variations with age. Sera from persons with various clinical types of amyloidosis, connective tissue diseases and bacterial pneumonia did not differ significantly from normal values. A significant difference was noted in the sera from persons with malignancy, where a mean value of 10.79 mg/dl was determined. Although a number of similarities exist between SAP and CRP [C-reactive protein], SAP does not share the property of being an acute-phase reactant.