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Hepatitis B surface antigen- and immunoglobulin-specific circulating immune complexes in acute hepatitis B virus

J F Tsai1, H S Margolis, J E Jeng

  • 1Department of Internal Medicine, Kaohsiung Medical College, Taiwan, Republic of China.

Clinical Immunology and Immunopathology
|September 1, 1996
PubMed

Insights

Circulating immune complexes (CICs) containing HBsAg and IgM are common in acute hepatitis B and correlate with disease activity. These findings suggest CICs play a role in the pathogenesis of acute hepatitis B.

Area of Science:

  • Hepatology
  • Immunology
  • Virology

Background:

  • Circulating immune complexes (CICs) are implicated in various immune-mediated diseases.
  • The role of specific CICs in the pathogenesis of acute hepatitis B remains to be fully elucidated.

Purpose of the Study:

  • To assess the role of CICs containing Hepatitis B surface antigen (HBsAg), IgM, and IgG in acute hepatitis B.
  • To correlate CIC levels with disease activity and clinical presentation.

Main Methods:

  • C1q and conglutinin (K) assays were used to determine CICs in 242 acute hepatitis B patients and 60 healthy controls.
  • HBsAg-specific CICs, IgM, and IgG levels were quantified.
  • Alanine aminotransferase (ALT) activity was measured as an indicator of liver damage.

Main Results:

  • CICs were detected in 90.9% of acute hepatitis B cases.
  • Patients presenting within one week of symptom onset showed higher frequencies of abnormal IgM class CICs, HBsAg-specific CICs, and elevated ALT levels (>30-fold ULN).
  • A significant association was observed between HBsAg-CIC and C1q-CIC, with HBsAg-CIC and IgM CICs correlating with disease activity.

Conclusions:

  • HBsAg-CIC and IgM class CICs are common in acute hepatitis B and correlate with disease activity.
  • C1q-binding CICs are predominant and may contribute to the pathogenesis of acute hepatitis B.
  • Early detection of specific CICs could aid in monitoring disease progression.

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