In other exciting data presented at the congress, the authors of a study on PSI-7977, a uridine nucleotide analog, propose that it may signal an end to response guided therapy in HCV GT1 patients.(4) Response-guided therapy is a paradigm for treating chronic HCV infections in which treatment decisions are based on how rapidly HCV responds to treatment.(5) With response-guided therapy, patients who rapidly clear virus from their bloodstream are eligible to receive a shorter duration of therapy, while slower responders receive standard or extended durations of therapy.(5)
In earlier studies, PSI-7977 has been associated with greater than 90% SVR (sustained virological response undetectable HCV RNA level 24 weeks after treatment) in HCV GT1, GT2, or GT3 patients, independent of predictors of poor responsiveness to interferon. In new data presented at the congress, the study authors show HCV GT1, GT4, or GT6 patients treated with PSI-7977 and PEG/RBV achieved 97% RVR (rapid virological response undetectable HCV RNA level after four weeks of treatment), with no viral breakthrough or relapse observed to date in subjects completing at least 10 weeks of PSI-7977.
|Contact: Travis Taylor|
European Association for the Study of the Liver