ATP13A3 and neuroblastoma: These data indicate that targeting polyamine uptake via ATP13A3 impacts neuroblastoma cell growth, which is further confirmed by our observation that the polyamine uptake inhibitor AMXT 1501 [11, 26, 27], as a single agent, negatively impacted colony formation ability and viability of MYCN‐amplified KELLY and non‐MYCN‐amplified SH‐SY5Y neuroblastoma cells (Fig. 6C,D).