PPARG and obesity due to melanocortin 4 receptor deficiency: Adipogenesis is promoted by adipogenesis regulators such as peroxisome proliferator-activated receptor (PPARγ), CCAAT/enhancer binding proteins (C/EBPα), fatty acid synthase (FAS), and CD36, and abnormal regulation of adipogenesis contributes to obesity due to adipocyte dysfunction [7,11].