Cited by 261Liver Disease Diagnosis and TreatmentLipid metabolism and biosynthesisDiet, Metabolism, and Disease

Prevention of hepatic steatosis and hepatic insulin resistance in mitochondrial acyl-CoA:glycerol-sn-3-phosphate acyltransferase 1 knockout mice

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Neschen, Susanne, Morino, Katsutaro, Hammond, Linda E., Zhang, Dongyan, Liu, Zhen-Xiang, Romanelli, Anthony J., Cline, Gary W., Pongratz, Rebecca L. +4 more·2005·Cell Metabolism

Abstract

In order to investigate the role of mitochondrial acyl-CoA:glycerol-sn-3-phosphate acyltransferase 1 (mtGPAT1) in the pathogenesis of hepatic steatosis and hepatic insulin resistance, we examined whole-body insulin action in awake mtGPAT1 knockout (mtGPAT1(-/-)) and wild-type (wt) mice after regular control diet or three weeks of high-fat feeding. In contrast to high-fat-fed wt mice, mtGPAT1(-/-) mice displayed markedly lower hepatic triacylglycerol and diacylglycerol concentrations and were protected from hepatic insulin resistance possibly due to a lower diacylglycerol-mediated PKC activation. Hepatic acyl-CoA has previously been implicated in the pathogenesis of insulin resistance. Surprisingly, compared to wt mice, mtGPAT1(-/-) mice exhibited increased hepatic insulin sensitivity despite an almost 2-fold elevation in hepatic acyl-CoA content. These data suggest that mtGPAT1 might serve as a novel target for treatment of hepatic steatosis and hepatic insulin resistance and that long chain acyl-CoA's do not mediate fat-induced hepatic insulin resistance in this model.

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Crossref · 10.1016/j.cmet.2005.06.006

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Authors
Neschen, S., Morino, K., Hammond, L. E., Zhang, D., Liu, Z.-X., Romanelli, A. J., Cline, G. W., Pongratz, R. L., Zhang, X.-M., Choi, C. S., Coleman, R. A., & Shulman, G. I.
Affiliations
  • Howard Hughes Medical Institute (US)
  • University of North Carolina at Chapel Hill (US)
  • Yale University (US)
Corresponding author
Shulman, Gerald I.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2005-07
Volume
2
Issue
1
Pages
55-65
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2006375647
Cited by
261
References
64
Citations by year
2026: 2 · 2025: 5 · 2024: 7 · 2023: 8 · 2022: 7 · 2021: 10 · 2020: 6 · 2019: 12 · 2018: 11 · 2017: 6 · 2016: 4 · 2015: 12 · 2014: 16 · 2013: 13 · 2012: 20
FWCI
13.15
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (F31GM020920, F31 GM20920)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01-DK40936, R01DK56598, U24DK59635, R01DK040936, U24DK059635, R01DK056598)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
hepatic steatosis, hepatic insulin resistance, knockout mice, high-fat diet, diacylglycerol, protein kinase C, triglycerides, insulin sensitivity, lipid metabolism
MeSH terms
Acetyl-CoA Carboxylase, Acetyl Coenzyme A, Animals, Dietary Fats, Diglycerides, Fasting, Fatty Liver, Glucose Tolerance Test, Glycerol-3-Phosphate O-Acyltransferase, Insulin Resistance, Liver, Lysophospholipids, Male, Malonyl Coenzyme A, Mice, Inbred C57BL, Mitochondria, Multienzyme Complexes, Phenotype, Triglycerides, Protein Serine-Threonine Kinases, Mice, Knockout, Mice, AMP-Activated Protein Kinases

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