PPARα

PPARα is a ligand-activated nuclear receptor that controls fatty acid metabolism in oxidative tissues, especially liver, heart, and muscle[1]. Mechanistically, hepatocyte PPARα acts as a lipid sensor that coordinates fasting-responsive gene networks for fatty acid homeostasis, ketogenesis, and metabolic adaptation[2]. In disease models, liver PPARα protects against NAFLD by supporting whole-body fatty acid homeostasis, while combined PPARα and PPARβ/δ activation improves steatosis, inflammation, and fibrosis in preclinical liver disease models[3][1]. Compared with related isoforms, PPARα primarily promotes fatty acid catabolism, whereas PPARγ favors fatty acid uptake, triglyceride storage, insulin sensitivity, and glucose metabolism[4][5]. For experimental applications, fibrates and WY-14,643 serve as PPARα agonists, while GW6471 supports antagonist-based studies by stabilizing corepressor recruitment to the PPARα ligand-binding domain[6][7].