Treatment of chronic hepatitis C in human immunodeficiency virus/hepatitis C virus-coinfected patients in the era of pegylated interferon and ribavirin

A significant percentage of human immunodeficiency virus (HIV)-infected individuals are also infected with the hepatitis C virus (HCV). With the much-improved survival of HIV-infected patients through the use of highly active antiretroviral therapy, liver disease caused by coinfection with HCV has emerged as a significant threat to the health and survival of persons with HIV disease. HIV/HCV-coinfected patients with ongoing HIV viremia have a faster rate of HCV-related liver fibrosis progression and a more rapid progression to liver failure or hepatocellular carcinoma than HCV-monoinfected persons. In contrast to the deleterious effect of HIV on HCV-related liver disease, most studies have shown that HCV does not influence progression of HIV infection to AIDS or death. HCV therapy with peginterferon alfa (2a or 2b) plus ribavirin can achieve a sustained viral response in HlV/HCV-coinfected patients of up to 38% in HCV genotype 1 and up to 73% in genotypes 2 and 3. The safety profile is largely similar to therapy in HIV-monoinfected patients, but there is a higher incidence of mitochondrial toxicity in patients taking didanosine or stavudine and of anemia in patients taking zidovudine. There is no proven anti-HCV therapy for HIV/HCV-colnfected patients with end-stage liver disease (ESLD). Liver transplantation is being investigated as a potential therapeutic option for HIV-infected individuals with ESLD, and initial reports are encouraging. Given that pegylated interferon and ribavirin have been shown to be safe and effective for HIV/HCV coinfection as well as HCV monoinfection, all HTV/HCV-coinfected patients should be evaluated for therapy.