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Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
Published on: October 20, 2021
Current treatment options and response rates in children with chronic hepatitis C
Insights
Hepatitis C virus (HCV) vertical transmission is common in children. PEG-interferon and ribavirin treatment shows high efficacy, especially for genotypes 2/3, offering a well-tolerated standard of care.
Area of Science:
- Hepatology
- Pediatric Infectious Diseases
- Virology
Background:
- Vertical transmission is the primary route of Hepatitis C Virus (HCV) infection in children, with perinatal transmission rates between 2-5%.
- Prevalence of HCV in children in developed nations is between 0.1-0.4%, with spontaneous viral clearance varying by genotype (2.4%-25%).
Discussion:
- A combination therapy of recombinant polyethylene glycol (PEG)-interferon α and ribavirin is approved for children aged 2-17 years with chronic HCV.
- Prospective studies involving 318 children and adolescents (3-17 years) demonstrated an overall sustained viral response (SVR) of 60.7%.
Key Insights:
- SVR rates varied by genotype: 51% for genotype 1, 93% for genotype 2/3, and 55% for genotype 4.
- Treatment was generally well-tolerated, with notable side effects in approximately 20% of patients.
- The PEG-interferon α and ribavirin combination is effective and well-tolerated, particularly for genotype 2/3 infections.
Outlook:
- This combination therapy is recommended as the standard of care for pediatric HCV patients.
- Further research is needed to identify more effective treatment options for genotype 1 infections in children.
Abstract:
Vertical transmission has become the most common mode of transmission of hepatitis C virus (HCV) in children. The rate of perinatal transmission from an HCV-infected mother to her child ranges from 2% to 5% and the prevalence of HCV in children in developed countries ranges between 0.1% and 0.4%. Spontaneous viral clearance seems to be dependent on the genotype and has been reported between 2.4%-25%. For chronically infected patients, treatment with recombinant polyethylene glycol (PEG)-interferon α-2b and daily ribavirin has now been approved as standard treatment for children 2-17 years of age. In five large prospective studies, a total of 318 children and adolescents aged 3-17 years were treated either with subcutaneous PEG-interferon α-2b at a dose of 1-1.5 μg/kg or 60 μg/m² once a week in combination with oral ribavirin (15 mg/kg per day) or PEG-interferon α-2a with ribavirin. Subjects with genotype 1 and 4 received the medication for 48 wk and individuals with genotype 2 and 3 mainly for 24 wk. Overall sustained viral response (SVR) was achieved in 193/318 (60.7%) of treated patients. Stratified for genotype; 120/234 (51%) with genotype 1, 68/73 (93%) with genotype 2/3, and 6/11 (55%) with genotype 4 showed SVR. Relapse rate was between 7.7% and 17%. Overall, treatment was well tolerated; however, notable side effects were present in approximately 20%. According to recent experiences in the treatment of chronic hepatitis C in children and adolescents, a combination of PEG-interferon α with ribavirin has been found to be well tolerated and highly efficacious, particularly in individuals with genotype 2/3. Thus, this treatment can be recommended as standard of care until more effective treatment options will become available for genotype 1 patients.
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