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PPAR Ligands as Potential Modifiers of Breast Carcinoma Outcomes
1Center for Biomedical Genomics and Bioinformatics, Molecular and Microbiology Department, College of Science, George Mason University, Fairfax, VA 22031, USA.
Abstract:
Chemically synthesized ligands for nuclear receptors of the PPAR family modulate a number of physiological functions, particularly insulin resistance in the context of energy homeostasis and the metabolic syndrome. Additionally, these compounds may treat or prevent the development of many secondary consequences of the metabolic syndrome. Many PPAR agonists are also known to influence the proliferation and apoptosis of breast carcinoma cells though the experiments were carried out at suprapharmacological doses of PPAR ligands. It is possible that the breast epithelium of diabetics exposed to PPAR agonists will experience perturbation of the corresponding signaling pathway. Consequently, these patients' lifetime breast carcinoma risks could be modified, as their breast lesion incidence or the rates of the conversion of these lesions to carcinomas might vary upward or downward. PPAR activating treatment may also influence the progression of existing, undiagnosed invasive lesions. In this review, we attempt to summarize the possible influence of chemical PPAR ligands on the molecular pathways involved in the initiation and progression of breast carcinoma, with a major emphasis on PPARgamma agonists thiazolidinediones (TZDs).
Insights
Peroxisome proliferator-activated receptor (PPAR) agonists may impact breast cancer risk in diabetic patients. This review explores how PPAR ligands influence breast carcinoma initiation and progression pathways.
Area of Science:
- Endocrinology
- Oncology
- Metabolic Syndrome Research
Background:
- Nuclear receptors of the PPAR family regulate energy homeostasis and insulin resistance.
- PPAR agonists are investigated for metabolic syndrome treatment and secondary complication prevention.
- PPAR ligands at high doses affect breast carcinoma cell proliferation and apoptosis.
Purpose of the Study:
- To review the potential influence of chemical PPAR ligands on breast carcinoma molecular pathways.
- To focus on PPARgamma agonists, specifically thiazolidinediones (TZDs).
- To explore how PPAR agonists might alter breast cancer risk in diabetic patients.
Main Methods:
- Literature review summarizing existing research on PPAR ligands and breast carcinoma.
- Analysis of molecular pathways involved in breast cancer initiation and progression.
- Emphasis on studies involving PPARgamma agonists (TZDs).
Main Results:
- PPAR agonists can influence breast carcinoma cell behavior.
- Diabetic patients on PPAR agonists might experience altered breast cancer risk.
- Potential modifications in breast lesion incidence and progression rates are suggested.
Conclusions:
- Chemical PPAR ligands may affect the molecular pathways of breast carcinoma initiation and progression.
- Further investigation is needed to clarify the impact of PPAR agonists on breast cancer risk, especially in diabetic populations.
- Thiazolidinediones (TZDs) warrant specific attention due to their prominent role as PPARgamma agonists.
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