Cited by 159Peroxisome Proliferator-Activated ReceptorsCardiovascular Function and Risk FactorsCancer, Lipids, and Metabolism

PPARγ-induced cardiolipotoxicity in mice is ameliorated by PPARα deficiency despite increases in fatty acid oxidation

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Son, Ni-Huiping, Yu, Shuiqing, Tuinei, Joseph, Arai, Kotaro, Hamai, Hiroko, Homma, Shunichi, Shulman, Gerald I., Abel, E. Dale +1 more·2010·Journal of Clinical Investigation

Abstract

Excess lipid accumulation in the heart is associated with decreased cardiac function in humans and in animal models. The reasons are unclear, but this is generally believed to result from either toxic effects of intracellular lipids or excessive fatty acid oxidation (FAO). PPARγ expression is increased in the hearts of humans with metabolic syndrome, and use of PPARγ agonists is associated with heart failure. Here, mice with dilated cardiomyopathy due to cardiomyocyte PPARγ overexpression were crossed with PPARα-deficient mice. Surprisingly, this cross led to enhanced expression of several PPAR-regulated genes that mediate fatty acid (FA) uptake/oxidation and triacylglycerol (TAG) synthesis. Although FA oxidation and TAG droplet size were increased, heart function was preserved and survival improved. There was no marked decrease in cardiac levels of triglyceride or the potentially toxic lipids diacylglycerol (DAG) and ceramide. However, long-chain FA coenzyme A (LCCoA) levels were increased, and acylcarnitine content was decreased. Activation of PKCα and PKCδ, apoptosis, ROS levels, and evidence of endoplasmic reticulum stress were also reduced. Thus, partitioning of lipid to storage and oxidation can reverse cardiolipotoxicity despite increased DAG and ceramide levels, suggesting a role for other toxic intermediates such as acylcarnitines in the toxic effects of lipid accumulation in the heart.

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Crossref · 10.1172/jci40905

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Authors
Son, N.-H., Yu, S., Tuinei, J., Arai, K., Hamai, H., Homma, S., Shulman, G. I., Abel, E. D., & Goldberg, I. J.
Affiliations
Columbia University (US)
Corresponding author
Goldberg, Ira J.
Venue
Journal of Clinical Investigation
Published
2010-10-01
Volume
120
Issue
10
Pages
3443-3454
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2150170148
Cited by
159
References
88
Citations by year
2026: 4 · 2025: 8 · 2024: 6 · 2023: 7 · 2022: 10 · 2021: 9 · 2020: 8 · 2019: 6 · 2018: 10 · 2017: 12 · 2016: 12 · 2015: 13 · 2014: 10 · 2013: 11 · 2012: 21
FWCI
5.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL045095, R01HL073029, P50HL077113, U01HL087947, HL73029, HL45095, R37HL045095)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK040936, U24DK059635, U2CDK059635, R24DK085638, P30DK034989, P30DK045735)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Function and Risk Factors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
Keywords
PPARγ, PPARα, fatty acid oxidation, triglyceride synthesis, acylcarnitines, diacylglycerol, ceramide, protein kinase C alpha, PKCδ, endoplasmic reticulum stress, apoptosis, reactive oxygen species, dilated cardiomyopathy, heart failure, metabolic syndrome
MeSH terms
Animals, Fatty Acids, Fatty Acids, Nonesterified, Lipids, Mice, Inbred CBA, Mice, Inbred C57BL, Myocardium, Oxidation-Reduction, Triglycerides, Apoptosis, Reactive Oxygen Species, Myocytes, Cardiac, PPAR alpha, PPAR gamma, Lipid Metabolism, Mice

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