Cited by 103Peroxisome Proliferator-Activated ReceptorsInflammatory mediators and NSAID effectsProstate Cancer Treatment and Research

15-Deoxy-Δ12,14-prostaglandin J2-induced apoptosis does not require PPARγ in breast cancer cells

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Clay, Carl E., Monjazeb, Arta, Thorburn, Jacqueline, Chilton, Floyd H., High, Kevin P.·2002·Journal of Lipid Research

Abstract

Naturally occurring derivatives of arachidonic acid are potent agonists for the nuclear hormone receptor peroxisome proliferator-activated receptor gamma (PPARgamma) and block cancer cell proliferation through the induction of apoptosis. We have previously reported that induction of apoptosis using cyclopentenone prostaglandins of the J series, including 15deoxydelta(12,14)PGJ(2) (15dPGJ(2)), is associated with a high degree of PPAR-response element (PPRE) activity and requires early de novo gene expression in breast cancer cells. In the current study, we used pharmacologic and genetic approaches to test the hypothesis that PPARgamma is required for 15dPGJ(2)-induced apoptosis. The PPARgamma agonists 15dPGJ(2), trogliltazone (TGZ), and GW7845, a synthetic and highly selective tyrosine-based PPARgamma agonist, all increased transcriptional activity of PPARgamma, and expression of CD36, a PPARgamma-dependent gene. Transcriptional activity and CD36 expression was reduced by GW9662, a selective and irreversible PPARgamma antagonist, but GW9662 did not block apoptosis induced by 15dPGJ(2). Moreover, dominant negative expression of PPARgamma blocked PPRE transcriptional activity, but did not block 15dPGJ(2)-induced apoptosis. These studies show that while 15dPGJ(2) activates PPRE-mediated transcription, PPARgamma is not required for 15dPGJ(2)-induced apoptosis in breast cancer cells. Other likely mechanisms through which cyclopentenone prostaglandins induce apoptosis of cancer cells are discussed.

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Crossref · 10.1194/jlr.m200224-jlr200

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  • Recent in vitro studies indicate that the effects of PPARγ agonists on cell growth are often independent of the presence of PPARγ, so the clinical relevance of in vitro findings is unclear.

    “However, since recent in vitro studies indicate that the effects of PPARγ agonists on cell growth are often independent of the presence of PPARγ (100–102), the clinical relevance of findings of in vitro studies is unclear.”

    From Diabetes and Cancer (2010) · cites this paper as [101]

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Authors
Clay, C. E., Monjazeb, A., Thorburn, J., Chilton, F. H., & High, K. P.
Affiliations
Atrium Health Wake Forest Baptist (US)
Corresponding author
High, Kevin P.
Venue
Journal of Lipid Research
Publisher
Elsevier BV
Published
2002-11
Volume
43
Issue
11
Pages
1818-1828
ISSN
0022-2275 (ISSN-L)
OpenAlex
W2184417866
Cited by
103
References
81
Citations by year
2022: 1 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 2 · 2014: 3 · 2013: 4 · 2012: 2
FWCI
3.25
Type
journal article
Language
en
Open access
Locations
  • Journal of Lipid Research (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (1r01ai042022-01a1, CA‐12197)
  • U.S. Army
  • National Cancer Institute (CA12197-27, P30CA012197)
  • National Institute of Allergy and Infectious Diseases (R01 AI 42022)
  • U.S. Army Medical Research Acquisition Activity
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
  • Health Sciences › Medicine › Pharmacology › Inflammatory mediators and NSAID effects
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
Keywords
15-deoxy-Δ12,14-prostaglandin J2, cyclopentenone prostaglandins, PPARγ, apoptosis, breast cancer cells, PPAR response element, CD36, GW9662, troglitazone
MeSH terms
Breast Neoplasms, Cell Nucleus, Fluorescent Antibody Technique, Time Factors, Transcription Factors, Transcription, Genetic, Tumor Cells, Cultured, Prostaglandin D2, Gene Expression Regulation, Neoplastic, Apoptosis, Receptors, Cytoplasmic and Nuclear, Response Elements, Protein Transport

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