PPARG and neuroblastoma: In another publication, the same authors showed that the VGVAPG peptide influenced the expression of PPARγ mRNA also in the neuroblastoma cell line SH-SY5Y (Szychowski et al. 2019a), although the role of PPARγ in the mechanism of action of the VGVAPG peptide in these cells has not yet been thoroughly investigated.