Investigational dose of oral interferon-free treatment can cure hepatitis C in children

April 21, 2017, European Association for the Study of the Liver
Electron micrographs of hepatitis C virus purified from cell culture. Scale bar is 50 nanometers. Credit: Center for the Study of Hepatitis C, The Rockefeller University.

A study presented today that evaluated an investigational dosage of once-daily ledipasvir 45 mg/sofosbuvir 200 mg (LDV/SOF) in children aged six to 11 years infected with the Hepatitis C virus (HCV), found that 99% of children (n=89/90) had undetectable levels of HCV-RNA 12 weeks after treatment. The study, presented at The International Liver Congress 2017 in Amsterdam, The Netherlands, also showed that the fixed-dose combination of LDV/SOF was well-tolerated, and no patients experienced a serious adverse event considered related to the study drug.

Around 180 million people globally have chronic HCV infection,1 including approximately 15 million people in the EU.2 The prevalence of HCV infection in children varies from 0.05%-0.36% in the United States and Europe and up to 1.8%-5.8% in some developing countries.3 While direct-acting antivirals have been used to treat and cure adult with HCV,4-7 until now children have been mainly treated for 24 to 48 weeks with pegylated interferon plus ribavirin (RBV), an older which causes severe side effects.8

"Direct-acting antivirals have transformed the treatment of adults with chronic HCV, however, studies of these new therapies in children are required," said Dr Karen Murray, University of Washington School of Medicine and Seattle Children's, Seattle, United States, and lead author of the study. "These data establish the use of the oral direct-acting antivirals as an important treatment option in HCV-infected children aged six to 11 years old."

This ongoing, open-label study enrolled 90 children aged between six and 11 years with chronic HCV, mostly genotype 1 (n=86). Children with HCV genotype 1 infection received 12 weeks of treatment (n=85) or 24 weeks of treatment if they had cirrhosis and failed prior treatment with pegylated interferon plus RBV (n=1); genotype 3 patients received LDV/SOF plus RBV for 24 weeks (n=2); genotype 4 patients received LDV/SOF for 12 weeks (n=2). Most children were male (59%), white (79%), treatment naïve (80%), and vertically infected (97%). Of the study population, 89/90 achieved a sustained virologic response 12 weeks after treatment (SVR12); one treatment-naïve genotype 1 patient with cirrhosis relapsed. No children discontinued the study due to side effects or had a severe or life-threatening adverse event related to the study drug. The most common side effects reported in 10% or more of patients were headache, fever, abdominal pain, diarrhoea, vomiting, cough, fatigue, sore throat and nausea.

"This study is a breakthrough for the management of children aged six to 11 years old with Hepatitis C, demonstrating that the new DAA regimen is highly efficacious and, more importantly, safe in this group of HCV-infected ", said Prof Frank Tacke, University Hospital Aachen, Germany, and EASL Governing Board Member.

Explore further: Study demonstrates the efficacy of an investigational treatment in hepatitis C subgroup

More information: Abstract: Ledipasvir/sofosbuvir ± ribavirin for 12 or 24 weeks is safe and effective in children 6-11 years old with chronic hepatitis C infection (PS101), 17:30 - 17:45. The International Liver Congress 2017.

References:

1 EASL Recommendation on Treatment of Hepatitis C 2016. Available from: www.easl.eu/medias/cpg/HCV2016/English-report.pdf. Last accessed: April 2017.

2 World Health Organization. Global Alert and Response - Hepatitis C. Available from: www.who.int/csr/disease/hepati … o2003/en/index3.html. Last accessed: April 2017.

3 Pawlowska M, Malgorzata et al. What's new in hepatitis C virus infections in children? WJG. 2015;21(38):10783-10789.

4 Afdhal N, et al. Ledipasvir and sofosbuvir for untreated HCV genotype 1 infection. N Engl J Med. 2014 May 15;370(20):1889-98.

5 Afdhal N, et al. Ledipasvir and sofosbuvir for previously treated HCV genotype 1 infection. N Engl J Med. 2014 Apr 17;370(16):1483-93.

6 Kowdley KV, et al. Ledipasvir and sofosbuvir for 8 or 12 weeks for chronic HCV without cirrhosis. N Engl J Med. 2014 May 15;370(20):1879-88.

7 Sulkowski MS, et al. Daclatasvir plus sofosbuvir for previously treated or untreated chronic HCV infection. N Engl J Med. 2014 Jan 16;370(3):211-21.

8 Jara P, Hierro L. Treatment of Hepatitis C in children. Expert Rev Gastroenterol Hepatol. 2010;4(1):51-61.

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