Revisiting PPARγ as a target for the treatment of metabolic disorders
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As the prevalence of obesity has increased explosively overthe last several decades, associated metabolic disorders,including type 2 diabetes, dyslipidemia, hypertension, andcardiovascular diseases, have been also increased. Thus, newstrategies for preventing and treating them are needed. Thenuclear peroxisome proliferator-activated receptors (PPARs)are involved fundamentally in regulating energy homeostasis;thus, they have been considered attractive drug targets foraddressing metabolic disorders. Among the PPARs, PPARγ is amaster regulator of gene expression for metabolism,inflammation, and other pathways in many cell types,especially adipocytes. It is a physiological receptor of thepotent anti-diabetic drugs of the thiazolidinediones (TZDs)class, including rosiglitazone (Avandia). However, TZDs haveundesirable and severe side effects, such as weight gain, fluidretention, and cardiovascular dysfunction. Recently, manyreports have suggested that PPARγ could be modulated bypost-translational modifications (PTMs), and modulation ofPTM has been considered as novel approaches for treatingmetabolic disorders with fewer side effects than the TZDs. Inthis review, we discuss how PTM of PPARγ may be regulatedand issues to be considered in making novel anti-diabeticdrugs that can modulate the PTM of PPARγ.
Abstract
As the prevalence of obesity has increased explosively overthe last several decades, associated metabolic disorders,including type 2 diabetes, dyslipidemia, hypertension, andcardiovascular diseases, have been also increased. Thus, newstrategies for preventing and treating them are needed. Thenuclear peroxisome proliferator-activated receptors (PPARs)are involved fundamentally in regulating energy homeostasis;thus, they have been considered attractive drug targets foraddressing metabolic disorders. Among the PPARs, PPARγ is amaster regulator of gene expression for metabolism,inflammation, and other pathways in many cell types,especially adipocytes. It is a physiological receptor of thepotent anti-diabetic drugs of the thiazolidinediones (TZDs)class, including rosiglitazone (Avandia). However, TZDs haveundesirable and severe side effects, such as weight gain, fluidretention, and cardiovascular dysfunction. Recently, manyreports have suggested that PPARγ could be modulated bypost-translational modifications (PTMs), and modulation ofPTM has been considered as novel approaches for treatingmetabolic disorders with fewer side effects than the TZDs. Inthis review, we discuss how PTM of PPARγ may be regulatedand issues to be considered in making novel anti-diabeticdrugs that can modulate the PTM of PPARγ.
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