PPARG and cancer: Both human NSCLC and SCLC cells exhibited PPARγ mRNA and protein, and reported that ligands such as ciglitazone and 15-deoxy-δ-12,14-prostaglandin J2 (15d-PGJ2) suppressed the growth of cancer cells at particular doses or times, with ciglitazone being less effective than 15d-PGJ2.