ANA598 Demonstrates Potent Antiviral Activity in an Early Clinical Study in HCV-Infecte...( Patients treated at the initial dose ...),Health

Patients treated at the initial dose in an ongoing Phase Ib trial demonstrated a 2.5 log10 median viral load decline after three days

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SAN DIEGO, Jan. 8 /PRNewswire-FirstCall/ -- Anadys Pharmaceuticals, Inc. (Nasdaq: ANDS) today announced results from the first cohort of an ongoing Phase Ib clinical trial of ANA598, the Company's investigational non-nucleoside polymerase inhibitor. ANA598 was very well-tolerated and demonstrated potent antiviral activity in patients infected with chronic Hepatitis C virus (HCV) in this first cohort of the study.

Patients in the first cohort received 200 mg ANA598 (n=8) or placebo (n=2), twice-daily (bid) for three days. At the end of the treatment period, the median viral load decline was 2.5 log10 (>99%), with a range of 1.4-3.4 log10, for the eight patients who received ANA598. Three patients who received ANA598 were genotype 1a and demonstrated a median viral load decline of 1.6 log10, while five patients who received ANA598 were genotype 1b and demonstrated a median viral load decline of 2.6 log10. All eight patients who received ANA598 demonstrated a rapid decline in viral load, and no patients demonstrated viral rebound while on study drug. In addition to the robust viral load decline, ANA598 was very well-tolerated and there were no serious adverse events in the first dose cohort, although conclusions regarding longer-term safety and tolerability cannot be made until the results of future clinical trials of longer duration in more patients are known. Patients are currently being enrolled in the second cohort (400 mg bid) of the study. Anadys expects to report detailed data from multiple cohorts of the study at an upcoming medical conference.

"We are very pleased with the antiviral activity and safety of ANA598
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