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Clinical Chemistry 28: 351-353, 1982;
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Clinical Chemistry, Vol 28, 351-353, Copyright © 1982 by American Association for Clinical Chemistry

Radioimmunoassay for hepatitis B core antigen

E Sagnelli, C Pereira, G Triolo, S Vernace and F Paronetto

Serum hepatitis B core antigen (HBcAg) is an important marker of hepatitis B virus replication. We describe an easy, sensitive radioimmunoassay for determination of HBcAg in detergent-treated serum pellets containing Dane particles. Components of a commercial kits for anti-core determination are used, and HBcAG is measured by competitive inhibition of binding of 125I-labeled antibodies to HBcAg with HBcAg- coated beads. We assayed of HBcAG in the sera of 49 patients with hepatitis B surface antigen (HBsAg)-positive chronic hepatitis, 50 patients with HBsAg-negative chronic hepatitis, and 30 healthy volunteers. HBcAg was detected in 41% of patients with HBsAg-positive chronic hepatitis but not in patients with HBsAg-negative chronic hepatitis. Hepatitis Be antigen (an antigen closely associated with the core of Dane particles) determined in the same sera by radioimmunoassay, was not detected in 50% of HBcAg-positive sera.




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Copyright © 1982 by the American Association for Clinical Chemistry.