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Role of PPAR-gamma in inflammation. Prospects for therapeutic intervention by food components
1The New Zealand Institute for Plant & Food Research Limited, Palmerston North, New Zealand. hmartin@hortresearch.co.nz
Abstract:
Peroxisome proliferator activated receptor gamma (PPARgamma) is a ligand-dependent transcription factor and a member of the nuclear receptor superfamily. Acting as sensors of hormones, vitamins, endogenous metabolites and xenobiotic compounds, the nuclear receptors control the expression of a very large number of genes. PPARgamma has been known for some time to regulate adipocyte differentiation, fatty acid storage and glucose metabolism, and is a target of anti-diabetic drugs. More recently, PPARgamma has been recognized as playing a fundamentally important role in the immune response through its ability to inhibit the expression of inflammatory cytokines and to direct the differentiation of immune cells towards anti-inflammatory phenotypes. A feature of PPARgamma is the structural diversity of its ligands, which encompass endogenous metabolites, dietary compounds and synthetic drugs. The high and increasing incidence of inflammatory and allergic disease, coupled with encouraging results from recent clinical trials, suggest that natural PPARgamma agonists found in foods may be beneficial to human health by acting as anti-inflammatory molecules. PPARgamma is therefore not only a target of the pharmaceutical industry, but also of great potential interest to the food industry, since it is activated by several natural dietary constituents. The prospects for dietary intervention in inflammatory disease have improved somewhat over the last few years, and are reviewed here.
Insights
Natural compounds activating peroxisome proliferator activated receptor gamma (PPARgamma) show potential for treating inflammatory and allergic diseases. Dietary intervention targeting PPARgamma offers promising health benefits by modulating immune responses.
Area of Science:
- Molecular Biology
- Immunology
- Nutritional Science
Background:
- Peroxisome proliferator activated receptor gamma (PPARgamma) is a nuclear receptor involved in gene expression.
- PPARgamma regulates adipocyte differentiation, glucose metabolism, and is a target for anti-diabetic drugs.
- Emerging evidence highlights PPARgamma's crucial role in immune response, inhibiting inflammatory cytokines and promoting anti-inflammatory immune cell phenotypes.
Purpose of the Study:
- To review the role of PPARgamma in immune response and inflammation.
- To explore the potential of natural PPARgamma agonists from food for human health.
- To assess the prospects of dietary intervention for inflammatory and allergic diseases.
Main Methods:
- Literature review of PPARgamma function and its ligands.
- Analysis of clinical trial data on PPARgamma agonists.
- Examination of the impact of dietary constituents on PPARgamma activity.
Main Results:
- PPARgamma agonists, including natural dietary compounds, can inhibit inflammatory cytokine expression.
- Immune cells differentiate towards anti-inflammatory phenotypes under PPARgamma influence.
- Natural PPARgamma agonists show promise as anti-inflammatory agents.
Conclusions:
- PPARgamma is a significant target for both the pharmaceutical and food industries due to its role in inflammation.
- Dietary intervention utilizing natural PPARgamma activators presents a viable strategy for managing inflammatory and allergic conditions.
- The structural diversity of PPARgamma ligands, including dietary components, underscores its potential for therapeutic applications.
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