Regarding TTX, complete inhibitions were observed at 100 nM, as also observed with ND7/23 (another murine neuroblastoma cell line) [59], and the IC50 value agreed with those reported with other cellular models only expressing Nav1.1 [47], Nav1.2 [60], Nav1.3 [47], Nav1.4 [61], Nav1.6 [62], or Nav1.7 [63]. The gene discussed is SCN4A; the disease is neuroblastoma.