Cited by 973Metabolism, Diabetes, and CancerAdipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic Diseases

Enhanced muscle fat oxidation and glucose transport by ACRP30 globular domain: Acetyl-CoA carboxylase inhibition and AMP-activated protein kinase activation

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Tomas, Eva, Tsao, Tsu-Shuen, Saha, Asish K., Murrey, Heather E., Zhang, Cheng cheng, Itani, Samar I., Lodish, Harvey F., Ruderman, Neil B.·2002·Proceedings of the National Academy of Sciences

Abstract

gACRP30, the globular subunit of adipocyte complement-related protein of 30 kDa (ACRP30), improves insulin sensitivity and increases fatty acid oxidation. The mechanism by which gACRP30 exerts these effects is unknown. Here, we examined if gACRP30 activates AMP-activated protein kinase (AMPK), an enzyme that has been shown to increase muscle fatty acid oxidation and insulin sensitivity. Incubation of rat extensor digitorum longus (EDL), a predominantly fast twitch muscle, with gACRP30 (2.5 micro g/ml) for 30 min led to 2-fold increases in AMPK activity and phosphorylation of both AMPK on Thr-172 and acetyl CoA carboxylase (ACC) on Ser-79. Accordingly, concentration of malonyl CoA was diminished by 30%. In addition, gACRP30 caused a 1.5-fold increase in 2-deoxyglucose uptake. Similar changes in malonyl CoA and ACC were observed in soleus muscle incubated with gACRP30 (2.5 micro g/ml), although no significant changes in AMPK activity or 2-deoxyglucose uptake were detected. When EDL was incubated with full-length hexameric ACRP30 (10 micro g/ml), AMPK activity and ACC phosphorylation were not altered. Administration of gACRP30 (75 micro g) to C57 BL6J mice in vivo led to increased AMPK activity and ACC phosphorylation and decreased malonyl CoA concentration in gastrocnemius muscle within 15-30 min. Both in vivo and in vitro, activation of AMPK was the first effect of gACRP30 and was transient, whereas alterations in malonyl CoA and ACC occurred later and were more sustained. Thus, gACRP30 most likely exerts its actions on muscle fatty acid oxidation by inactivating ACC via activation of AMPK and perhaps other signal transduction proteins.

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Crossref · 10.1073/pnas.222657499

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Authors
Tomas, E., Tsao, T.-S., Saha, A. K., Murrey, H. E., Zhang, C. C., Itani, S. I., Lodish, H. F., & Ruderman, N. B.
Affiliations
  • Diabetes Unit, Section of Endocrinology, Boston Medical Center and Departments of Medicine and Physiology, Boston University School of Medicine, Boston, MA 02118; Whitehead Institute for Biomedical Research, Cambridge, MA 02142-1479; and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
  • Boston University (US)
Corresponding author
Ruderman, Neil B.
Venue
Proceedings of the National Academy of Sciences
Published
2002-11-27
Volume
99
Issue
25
Pages
16309-16313
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2010188590
Cited by
973
References
41
Citations by year
2026: 4 · 2025: 8 · 2024: 10 · 2023: 17 · 2022: 18 · 2021: 21 · 2020: 26 · 2019: 31 · 2018: 39 · 2017: 20 · 2016: 36 · 2015: 29 · 2014: 41 · 2013: 61 · 2012: 53
FWCI
17.73
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk019514-35)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 19417, DK-19514, R37DK047618, R01-DK-019514)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
adiponectin, globular domain, AMPK, acetyl-CoA carboxylase, malonyl-CoA, glucose transport, insulin sensitivity, fast-twitch muscle, soleus muscle, gastrocnemius, signal transduction
MeSH terms
Acetyl-CoA Carboxylase, Animals, Biological Transport, Deoxyglucose, Enzyme Activation, Fatty Acids, Female, Glucose, Insulin Resistance, Male, Malonyl Coenzyme A, Mice, Inbred C57BL, Multienzyme Complexes, Muscle Proteins, Oxidation-Reduction, Phosphorylation, Protein Processing, Post-Translational, Proteins, Signal Transduction, Rats, Sprague-Dawley, Protein Serine-Threonine Kinases, Protein Structure, Tertiary, Muscle, Skeletal, Intercellular Signaling Peptides and Proteins, Mice, Rats, Adiponectin, AMP-Activated Protein Kinases

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