SLC7A11 and neuroblastoma: Curiously, some of the NB cell lines used in this study show partial resistance to death induced by the SLC7A11 inhibitor and GSH depletor erastin (17), which leads to an intriguing question: why are some NB cell lines resistant to erastin but sensitive to inhibition of GSH synthesis or inhibition of SLC7A11 mediated by sulfasalazine?