['We studied the effects of all-trans retinoic acid (ATRA) and Bone morphogenetic protein-6 (BMP-60 on neuronal differentiation of IMR-32 cells.', 'Immunostaining, Western blotting and MTT assays were used to characterize the survival and neuronal phenotype of IMR-32 cells differentiated by ATRA +/- BMP-6.'] Do bMP-6 and retinoic acid synergistically differentiate the IMR-32 human neuroblastoma cells?