... translation of B19 NS1 (18, 34), has lead us to examine the potential role of B19 NS1 in direct hepatocyte cytotoxicity. Our laboratory pre-viously demonstrated that B19 NS1 caused apoptosis in ... suicide, previously reported to be the mechanism of B19 NS1-induced cytotoxicity (34, 35). Further confirmation for the reduction of apop-tosis in the PathI transduced population of HepG2 cells ... Cell-Quest software (Becton-Dickson), and statistical analysis completed by FlowJo software (Tree Star, Inc, Ash-land, OR). Cytotoxicity Assay. Trypan blue dye exclusion was used to determine...