XIAP and retinoblastoma: Subsequent studies identified XIAP and ABCB1 as targets of miR-214-3p, and it was suggested that 214-3p sensitizes retinoblastoma cells to chemodrugs and promotes apoptosis by targeting XIAP (X-linked inhibitor of apoptosis) and ABCB1, which codes for the multi-drug resistance P-glycoprotein.