FOSTER CITY, CA--(Marketwire - September 22, 2008) - SciClone Pharmaceuticals, Inc. (NASDAQ: SCLN) today announced promising results from its proof-of-concept phase 2 clinical trial using its proprietary, immunomodulatory compound SCV-07 as a sole agent administered to patients chronically infected with the hepatitis C virus (HCV). The trial was designed to evaluate the effect of SCV-07 on hepatitis C viral load, as well as on other measures of immune response. SCV-07 demonstrated activity in some treated patients in the higher dosage groups, and the decrease in viral load in these patients was accompanied by an increase in an immunological biomarker which is usually correlated with response against HCV. Additionally, SCV-07 was shown to be generally safe and well-tolerated with no dose limiting toxicities or serious adverse events reported.