Comprehensive studies support the notion that the peroxisome proliferator-activated receptors, (PPARs), PPARalpha, PPARbeta/delta, and PPARgamma, regulate cell growth, morphogenesis, differentiation, and homeostasis. Agonists of each PPAR subtype exert their effects similarly or distinctly in different tissues such as liver, muscle, fat, and vessels. It is noteworthy that PPARalpha or PPARgamma...