Cited by 212Regulation of Appetite and ObesityPeroxisome Proliferator-Activated ReceptorsAdipokines, Inflammation, and Metabolic Diseases

Restoration of hypothalamic lipid sensing normalizes energy and glucose homeostasis in overfed rats

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Pocai, A.·2006·Journal of Clinical Investigation

Abstract

Short-term overfeeding blunts the central effects of fatty acids on food intake and glucose production. This acquired defect in nutrient sensing could contribute to the rapid onset of hyperphagia and insulin resistance in this model. Here we examined whether central inhibition of lipid oxidation is sufficient to restore the hypothalamic levels of long-chain fatty acyl-CoAs (LCFA-CoAs) and to normalize food intake and glucose homeostasis in overfed rats. To this end, we targeted the liver isoform of carnitine palmitoyltransferase-1 (encoded by the CPT1A gene) by infusing either a sequence-specific ribozyme against CPT1A or an isoform-selective inhibitor of CPT1A activity in the third cerebral ventricle or in the mediobasal hypothalamus (MBH). Inhibition of CPT1A activity normalized the hypothalamic levels of LCFA-CoAs and markedly inhibited feeding behavior and hepatic glucose fluxes in overfed rats. Thus central inhibition of lipid oxidation is sufficient to restore hypothalamic lipid sensing as well as glucose and energy homeostasis in this model and may be an effective approach to the treatment of diet-induced obesity and insulin resistance.

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Authors
Pocai, A.
Affiliations
Albert Einstein College of Medicine (US)
Corresponding author
Pocai, A.
Venue
Journal of Clinical Investigation
Published
2006-03-23
Volume
116
Issue
4
Pages
1081-1091
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2156594005
Cited by
211
References
52
Citations by year
2026: 4 · 2025: 3 · 2024: 4 · 2023: 5 · 2022: 2 · 2021: 8 · 2020: 6 · 2019: 4 · 2018: 3 · 2017: 9 · 2016: 15 · 2015: 9 · 2014: 6 · 2013: 17 · 2012: 23
FWCI
8.68
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Diabetes Association
  • Skirball Foundation
  • National Institutes of Health
  • Albert Einstein College of Medicine, Yeshiva University
  • National Institute on Aging (P01AG021654, AG 21654, T32AG023475)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-48321, R01DK045024, R01DK048321, R37DK048321, DK20541, P60DK020541, DK-45024, P30DK020541)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
overfeeding, CPT1A, carnitine palmitoyltransferase 1, long-chain fatty acyl-CoA, lipid oxidation, hyperphagia, insulin resistance, diet-induced obesity, glucose homeostasis, energy homeostasis, hepatic glucose production, ribozymes, mediobasal hypothalamus, fatty acid signaling
MeSH terms
Animals, Carnitine O-Palmitoyltransferase, Energy Metabolism, Glucose, Homeostasis, Hyperphagia, Hypothalamus, Liver, Male, Models, Biological, Oxidation-Reduction, Rats, Sprague-Dawley, Lipid Metabolism, Rats

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