Review article: optimizing SVR and management of the haematological side effects of peginterferon/ribavirin antiviral therapy for HCV - the role of epoetin, G-CSF and novel agents.

BACKGROUND: Chronic hepatitis C is one of the leading causes for chronic liver disease globally. The past two decades have seen many advances in hepatitis C treatment. Despite these advances, side effects of treatment are common. Haematological complications of treatment can result in treatment cessation and suboptimal results. Recent data have suggested a role for epoetin/granulocyte colony stimulating factor (G-CSF) in optimizing sustained virological response (SVR). AIM: To investigate the nature, frequency and management of haematological side effects in the treatment of chronic hepatitis C infection.
METHODS: The terms hepatitis C, hepatitis C virus (HCV), treatment, side effects, interferon, peginterferon, ribavirin, anaemia, haemoglobin, neutropenia, thrombocytopenia, haematological, growth factor, erythropoietin and G-CSF were searched on MEDLINE for the period 1991-2009. References from selected articles were also included.
RESULTS: Haematological side effects such as anaemia, neutropenia and thrombocytopenia are frequent in anti-HCV treatment. The off-label use of haematological growth factors is common and effective.
CONCLUSIONS: Erythropoietic agents are effective in treating anaemia, preventing ribavirin dose reduction, improving patients' quality of life, but the effect on SVR is not fully elucidated. G-CSF is effective in raising absolute neutrophil count; however, neutropenic HCV-infected patients on combination treatment may not experience increased bacterial infections. Eltrombopag, a new oral thrombopoietin mimetic, may allow combination treatment in patients with thrombocytopenia.