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Liver iron influences the response to interferon alpha therapy in chronic hepatitis C
S Fargion1, A L Fracanzani, M Sampietro
1Institute of Internal Medicine and Medical Physiopathology, University of Milan, Maggiore Hospital IRCCS, Italy.
Insights
Liver iron concentration significantly impacts treatment outcomes for patients with chronic hepatitis C virus (HCV) liver disease. Lower iron levels correlate with a higher likelihood of responding to interferon therapy, suggesting iron management as a therapeutic target.
Area of Science:
- Hepatology
- Virology
- Internal Medicine
Background:
- Chronic hepatitis C virus (HCV) infection can lead to liver disease.
- Interferon therapy is a treatment option for HCV, but response rates vary.
- The role of iron status in HCV treatment response is not fully understood.
Purpose of the Study:
- To investigate the relationship between iron status in patients with chronic liver disease due to HCV and their response to interferon therapy.
- To determine if liver iron concentration is a predictor of treatment success.
Main Methods:
- A study involving 58 patients with HCV-positive chronic liver disease.
- Patients received 1 year of alpha interferon therapy.
- Phlebotomy was added for patients with unnormalized alanine aminotransferase (ALT) after 3 months.
Main Results:
- Long-term response to interferon therapy was observed in 19 out of 52 patients who completed treatment.
- Univariate analysis showed liver iron concentration and HCV genotype were significantly associated with response.
- Multivariate analysis confirmed liver iron concentration as a significant predictor, with reduced iron associated with increased odds of response.
Conclusions:
- Liver iron concentration is a key factor influencing interferon therapy response in HCV patients.
- Iron levels in the liver appear more critical than other factors, including HCV characteristics.
- These findings suggest iron management may be important for optimizing HCV treatment outcomes.
Objective:
To define whether there is any relation between the iron status of patients with hepatitis C virus (HCV) chronic liver disease and their response to interferon therapy.
Design:
To evaluate the long-term response to 1 year of interferon therapy with addition of phlebotomies after 3 months of treatment if at that time alanine aminotransferase (ALT) had not normalized in a group of patients with HCV-positive chronic liver disease whose iron status had been characterized.
Setting:
A northern Italian hospital.
Participants:
Fifty-eight anti-HCV-positive patients (four HCV-RNA negative) with biopsy proven chronic hepatitis and no evidence of iron overload as indicated by normal transferrin saturation at the time of enrollment in the study.
Intervention:
Three times a week intramuscular injection of alpha interferon 3 MU for 1 year with addition of phlebotomies (350 ml/week) till iron depletion if after 3 months of interferon therapy ALT had not normalized.
Results:
A long-term response was observed in 19 of the 52 patients who completed the treatment, four HCV-RNA negative and 15 positive. The four RNA-negative and seven of the 15 RNA-positive long-term responders had been treated with interferon alone, and the other eight also with phlebotomies. At univariate analysis only HCV genotype, gamma-glutamyltranspeptidase and liver iron concentration were significantly associated with response whereas sinusoidal iron deposition was of borderline significance. No association was found with sex, age, duration of disease, histology, Knodell score, transferrin saturation %, serum ferritin, hepatocytic iron score, and portal iron score. HCV-RNA serum levels, measured in 29 patients, did not correlate with response. At multivariate analysis liver iron concentration was still significant and one unit reduction of liver iron concentration (natural logarithm transformed) was associated with 2.95 odds ratio of response.
Conclusion:
These results indicate that iron in the liver is more closely related to response to interferon than the other variables considered, including HCV characteristics.