Valentiner et al. [108] tested four synthetic PPARγ TZD agonists (ciglitazone, pioglitazone, troglitazone, rosiglitazone) and reported their in vitro effects on cell growth of seven human neuroblastoma cell lines (Kelly, LAN-1, LAN-5, LS, IMR-32, SK-N-SH, and SH-SY5Y). This evidence concerns the gene PPARG and neuroblastoma.