PRKCB and neuroblastoma: In this report, IC50 values between 3.7 and 8.2 μM were determined for the PKCβ inhibitor enzastaurin in a panel of parental neuroblastoma and rhabdhomyosarcoma cell lines and their vincristine-resistant sub-lines and IC50s between 3.3 and 9.5 μM in primary neuroblastoma cells.