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lüll Optimizing outcomes in patients with hepatitis C virus genotype 2 or 3 Berg T; Carosi GAntivir Ther 2008[]; 13 Suppl 1 (ä): 17-22On-treatment predictors of response could be useful in optimizing treatment for patients with hepatitis C virus (HCV) genotype 2 or 3. Early virological response (EVR) has limited value as a predictor of response in genotype 2 or 3 patients, as it is achieved by 97% of this population. However, rapid virological response (RVR) measured at week 4 is a strong predictor of sustained virological response (SVR) in this group, and patients achieving an RVR may be suitable candidates for shorter treatment durations. Several small studies investigating the efficacy of shortened treatment durations in this population have been published; however, differences in study design have made their collective interpretation difficult. We discuss these studies, followed by a comparison of the data from ACCELERATE, the largest, randomized trial carried out to investigate abbreviated therapy in genotype 2 and 3 patients. The data confirm that RVR, and its use alongside significant baseline predictors, can assist in optimizing therapy. Patients achieving an RVR have high SVR rates and might be candidates for shorter treatment duration, particularly those displaying a low viral load at baseline; however, the need to consider the increased rate of relapse versus the benefits of abbreviated therapy must also be considered. Conversely, in patients who do not achieve an RVR there is evidence to suggest they may benefit from intensified therapy (longer therapy and/or increased doses). As in genotype 1 and 4 patients, response-guided therapy aims to optimize treatment outcomes for individuals, without compromising SVR rates.|Antiviral Agents/*therapeutic use[MESH]|Clinical Trials as Topic[MESH]|Drug Therapy, Combination[MESH]|Genotype[MESH]|Hepacivirus/classification/*drug effects/genetics/physiology[MESH]|Hepatitis C, Chronic/*drug therapy/virology[MESH]|Humans[MESH]|Interferon alpha-2[MESH]|Interferon-alpha/*therapeutic use[MESH]|Polyethylene Glycols/*therapeutic use[MESH]|RNA, Viral/blood[MESH]|Randomized Controlled Trials as Topic[MESH]|Recombinant Proteins[MESH]|Ribavirin/*therapeutic use[MESH]|Time Factors[MESH]|Treatment Outcome[MESH]|Viral Load[MESH] |