The only point of reference, in this case, is the work of Sommer et al. [15] in which the level of expression of cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE), and mercaptopyruvate sulfotransferase (MPST) was measured in cells of two cell lines: monocytic U-937 and tumor SH-SY5Y (human embryonic neuroblastoma, neuroblastoma) treated with haloperidol, clozapine, olanzapine, and risperidone. This evidence concerns the gene MPST and neuroblastoma.