The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination

Despite extensive preclinical evidence that peroxisome proliferator-activated receptor (PPAR)γ activation protects against tumourigenesis, results from a few clinical trials using PPARγ ligands as monotherapy show modest success. In spite of this, several groups reported exciting results with therap...

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Main Authors: Graham Skelhorne-Gross, Christopher J. B. Nicol
Format: Article
Language:English
Published: Wiley 2012-01-01
Series:PPAR Research
Online Access:http://dx.doi.org/10.1155/2012/946943
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author Graham Skelhorne-Gross
Christopher J. B. Nicol
author_facet Graham Skelhorne-Gross
Christopher J. B. Nicol
author_sort Graham Skelhorne-Gross
collection DOAJ
description Despite extensive preclinical evidence that peroxisome proliferator-activated receptor (PPAR)γ activation protects against tumourigenesis, results from a few clinical trials using PPARγ ligands as monotherapy show modest success. In spite of this, several groups reported exciting results with therapeutic regimens that combine PPARγ ligands with other compounds: chemotherapeutic agents, retinoid x receptor (RXR)α agonists, statins, or cell-to-cell signaling molecules in preclinical cancer models and human trials. Here we have compiled an extensive review, consolidating the existing literature, which overwhelmingly supports a beneficial effect of treating with PPARγ ligands in combination with existing chemotherapies versus their monotherapy in cancer. There are many examples in which combination therapy resulted in synergistic/additive effects on apoptosis, differentiation, and the ability to reduce cell growth and tumour burden. There are also studies that indicate that PPARγ ligand pretreatment overcomes resistance and reduces toxicities. Several mechanisms are explored to explain these protective effects. This paper highlights each of these studies that, collectively, make a very strong case for the use of PPARγ ligands in combination with other agents in the treatment and management of several cancers.
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spelling doaj-art-6a2650f546904f85b52360d161c614fa2025-02-03T01:11:12ZengWileyPPAR Research1687-47571687-47652012-01-01201210.1155/2012/946943946943The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right CombinationGraham Skelhorne-Gross0Christopher J. B. Nicol1Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, CanadaDepartment of Pathology and Molecular Medicine, Queen's University, Kingston, ON, K7L 3N6, CanadaDespite extensive preclinical evidence that peroxisome proliferator-activated receptor (PPAR)γ activation protects against tumourigenesis, results from a few clinical trials using PPARγ ligands as monotherapy show modest success. In spite of this, several groups reported exciting results with therapeutic regimens that combine PPARγ ligands with other compounds: chemotherapeutic agents, retinoid x receptor (RXR)α agonists, statins, or cell-to-cell signaling molecules in preclinical cancer models and human trials. Here we have compiled an extensive review, consolidating the existing literature, which overwhelmingly supports a beneficial effect of treating with PPARγ ligands in combination with existing chemotherapies versus their monotherapy in cancer. There are many examples in which combination therapy resulted in synergistic/additive effects on apoptosis, differentiation, and the ability to reduce cell growth and tumour burden. There are also studies that indicate that PPARγ ligand pretreatment overcomes resistance and reduces toxicities. Several mechanisms are explored to explain these protective effects. This paper highlights each of these studies that, collectively, make a very strong case for the use of PPARγ ligands in combination with other agents in the treatment and management of several cancers.http://dx.doi.org/10.1155/2012/946943
spellingShingle Graham Skelhorne-Gross
Christopher J. B. Nicol
The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination
PPAR Research
title The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination
title_full The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination
title_fullStr The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination
title_full_unstemmed The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination
title_short The Key to Unlocking the Chemotherapeutic Potential of PPARγ Ligands: Having the Right Combination
title_sort key to unlocking the chemotherapeutic potential of pparγ ligands having the right combination
url http://dx.doi.org/10.1155/2012/946943
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