Self-regulation of the inflammatory response by peroxisome proliferator-activated receptors.

08:00 EDT 29th March 2019 | BioPortfolio

Summary of "Self-regulation of the inflammatory response by peroxisome proliferator-activated receptors."

The peroxisome proliferator-activated receptor (PPAR) family includes three transcription factors: PPARα, PPARβ/δ, and PPARγ. PPAR are nuclear receptors activated by oxidised and nitrated fatty acid derivatives as well as by cyclopentenone prostaglandins (PGA and 15d-PGJ) during the inflammatory response. This results in the modulation of the pro-inflammatory response, preventing it from being excessively activated. Other activators of these receptors are nonsteroidal anti-inflammatory drug (NSAID) and fatty acids, especially polyunsaturated fatty acid (PUFA) (arachidonic acid, ALA, EPA, and DHA). The main function of PPAR during the inflammatory reaction is to promote the inactivation of NF-κB. Possible mechanisms of inactivation include direct binding and thus inactivation of p65 NF-κB or ubiquitination leading to proteolytic degradation of p65 NF-κB. PPAR also exert indirect effects on NF-κB. They promote the expression of antioxidant enzymes, such as catalase, superoxide dismutase, or heme oxygenase-1, resulting in a reduction in the concentration of reactive oxygen species (ROS), i.e., secondary transmitters in inflammatory reactions. PPAR also cause an increase in the expression of IκBα, SIRT1, and PTEN, which interferes with the activation and function of NF-κB in inflammatory reactions.


Journal Details

This article was published in the following journal.

Name: Inflammation research : official journal of the European Histamine Research Society ... [et al.]
ISSN: 1420-908X


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Medical and Biotech [MESH] Definitions

TRANSCRIPTION FACTORS that are activated by ligands and heterodimerize with RETINOID X RECEPTORS and bind to peroxisome proliferator response elements in the promoter regions of target genes.

A mediator complex subunit that is believed to play a key role in the coactivation of nuclear receptor-activated transcription by the mediator complex. It interacts with a variety of nuclear receptors including RETINOIC ACID RECEPTORS; THYROID HORMONE RECEPTORS; VITAMIN D RECEPTORS; PEROXISOME PROLIFERATOR-ACTIVATED RECEPTORS; ESTROGEN RECEPTORS; and GLUCOCORTICOID RECEPTORS.

A transcriptional co-activator for NUCLEAR RECEPTORS. It is characterized by an N-terminal LxxLL sequence, a region that interacts with PPAR GAMMA, and a C-terminal RNA RECOGNITION MOTIF. It increases expression of MITOCHONDRIAL UNCOUPLING PROTEIN to regulate genes involved in metabolic reprogramming in response to dietary restriction and the integration of CIRCADIAN RHYTHMS with ENERGY METABOLISM.

THIAZOLES with two keto oxygens. Members are insulin-sensitizing agents which overcome INSULIN RESISTANCE by activation of the peroxisome proliferator activated receptor gamma (PPAR-gamma).

A peroxisome proliferator that is used experimentally to promote liver tumors. It has been used as an antihyperlipoproteinemic agent.

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