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Updated: Aug 19, 2026

A Protocol for Analyzing Hepatitis C Virus Replication
Published on: June 26, 2014
[IgM HCV antibody in chronic hepatitis and liver cirrhosis]
A Shibuya1, K Sakurai, A Takeuchi
1Department of Internal Medicine, Kitasato University School of Medicine, Sagamihara.
Insights
Testing for IgM antibody to hepatitis C virus aids in diagnosing chronic hepatitis C and monitoring disease activity. This antibody may also help predict treatment response in patients undergoing interferon therapy.
Area of Science:
- Hepatology
- Immunology
- Virology
Background:
- Chronic hepatitis C (HCV) poses a significant global health challenge.
- Accurate diagnosis and monitoring are crucial for effective patient management.
- The role of specific antibody types in HCV progression requires further elucidation.
Observation:
- Sera from 114 patients with chronic hepatitis C and liver cirrhosis were analyzed.
- IgM antibody to hepatitis C virus was detected in varying percentages across different disease stages.
- Detection rates were 40.0% in chronic active hepatitis (CAH), 21.4% in chronic indeterminate hepatitis (CIH), 17.4% in liver cirrhosis (LC), and 20.0% in LC with hepatocellular carcinoma (HCC).
Findings:
- IgM antibody to hepatitis C virus was detected in 40.0% of CAH cases.
- Elevated levels of serum alanine aminotransferase (s-ALT) correlated with IgM antibody presence.
- Patients positive for IgM antibody also exhibited high titers of IgG antibody to hepatitis C virus.
Implications:
- Testing for IgM antibody may improve the evaluation of disease recurrence and activity in chronic hepatitis C.
- This diagnostic marker could potentially guide interferon (IFN) therapy decisions.
- Further research is warranted to fully integrate IgM antibody testing into clinical practice for hepatitis C management.
Abstract:
To evaluate the role of IgM specific antibody in the diagnosis and monitoring of the patients with chronic hepatitis C, sera from 114 cases with chronic hepatitis C and liver cirrhosis were tested. IgM antibody to hepatitis C virus was detected in 40.0% of CAH, as compared with 21.4% of CIH, 17.4% of LC, 20.0% of LC with HCC. IgM antibody was also detectable in cases with high level of s-ALT. Patients with positive this antibody have high titer of IgG antibody to hepatitis C virus. In summary, testing for this antibody may be useful to evaluate the recurrence or disease activity and may also be helpful in IFN therapy.
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