PPAR (Peroxisome proliferator-activated receptor) is a member of the nuclear hormone receptor superfamily and functions as a transcriptional activator. PPARg is preferentially expressed in adipocyte as well as in vascular smooth muscle cells and macrophage. Besides its role in mediating adipogenesis and lipids metabolism, PPARg also modulates insulin sensitivity, cell proliferation and inflammation. The inhibition of PPARg transcription activity is due to MAP kinase phosphorylation at serine 84 of PPARg.