The Nuclear Hormone Receptor PPARγas a Therapeutic Target in Major Diseases

Author:

Schmidt Martina Victoria1,Brüne Bernhard1,von Knethen Andreas1

Affiliation:

1. Institute of Biochemistry I-Pathobiochemistry, Faculty of Medicine, Goethe-University Frankfurt, Germany

Abstract

The peroxisome proliferator-activated receptor γ (PPARγ) belongs to the nuclear hormone receptor superfamily and regulates gene expression upon heterodimerization with the retinoid X receptor by ligating to peroxisome proliferator response elements (PPREs) in the promoter region of target genes. Originally, PPARγwas identified as being essential for glucose metabolism. Thus, synthetic PPARγagonists, the thiazolidinediones (TZDs), are used in type 2 diabetes therapy as insulin sensitizers. More recent evidence implied an important role for the nuclear hormone receptor PPARγin controlling various diseases based on its anti-inflammatory, cell cycle arresting, and proapoptotic properties. In this regard, expression of PPARγis not restricted to adipocytes, but is also found in immune cells, such as B and T lymphocytes, monocytes, macrophages, dendritic cells, and granulocytes. The expression of PPARγin lymphoid organs and its modulation of macrophage inflammatory responses, lymphocyte proliferation, cytokine production, and apoptosis underscore its immune regulating functions. Moreover, PPARγexpression is found in tumor cells, where its activation facilitates antitumorigenic actions. This review provides an overview about the role of PPARγas a possible therapeutic target approaching major, severe diseases, such as sepsis, cancer, and atherosclerosis.

Publisher

Hindawi Limited

Subject

General Environmental Science,General Biochemistry, Genetics and Molecular Biology,General Medicine

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