Cited by 202Metabolism, Diabetes, and CancerAdipose Tissue and MetabolismNatural Antidiabetic Agents Studies

Skeletal Muscle-Selective Knockout of LKB1 Increases Insulin Sensitivity, Improves Glucose Homeostasis, and Decreases TRB3

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Koh, Ho-Jin, Arnolds, David E., Fujii, Nobuharu, Tran, Thien T., Rogers, Marc J., Jessen, Niels, Li, Yangfeng, Liew, Chong Wee +5 more·2006·Molecular and Cellular Biology

Abstract

LKB1 is a tumor suppressor that may also be fundamental to cell metabolism, since LKB1 phosphorylates and activates the energy sensing enzyme AMPK. We generated muscle-specific LKB1 knockout (MLKB1KO) mice, and surprisingly, found that a lack of LKB1 in skeletal muscle enhanced insulin sensitivity, as evidenced by decreased fasting glucose and insulin concentrations, improved glucose tolerance, increased muscle glucose uptake in vivo, and increased glucose utilization during a hyperinsulinemic-euglycemic clamp. MLKB1KO mice had increased insulin-stimulated Akt phosphorylation and a > 80% decrease in muscle expression of TRB3, a recently identified Akt inhibitor. Akt/TRB3 binding was present in skeletal muscle, and overexpression of TRB3 in C2C12 myoblasts significantly reduced Akt phosphorylation. These results demonstrate that skeletal muscle LKB1 is a negative regulator of insulin sensitivity and glucose homeostasis. LKB1-mediated TRB3 expression provides a novel link between LKB1 and Akt, critical kinases involved in both tumor genesis and cell metabolism.

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Crossref · 10.1128/mcb.00979-06

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  • LKB1-MKO and AMPK α2 KO, β2 KO and α2 KD mice have lower starting glycogen levels in skeletal muscle.

    “LKB1-MKO and AMPK α2 KO, β2 KO and α2 KD mice have lower starting glycogen levels in skeletal muscle [17,138-140], supporting a role for AMPK in glycogen synthesis.”

    From AMPK and Exercise: Glucose Uptake and Insulin Sensitivity (2013) · cites this paper as [17]

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  1. [6]Bruning, J. C., M. D. Michael, J. N. Winnay, T. Hayashi, D. Horsch, D. Accili, L. J. Goodyear, and C. R. Kahn. 1998. A muscle-specific insulin receptor knockout challenges the current concepts of glucose disposal and NIDDM pathogenesis. Mol. Cell 2:559-569. [DOI] [PubMed] [Google Scholar]

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Authors
Koh, H.-J., Arnolds, D. E., Fujii, N., Tran, T. T., Rogers, M. J., Jessen, N., Li, Y., Liew, C. W., Ho, R. C., Hirshman, M. F., Kulkarni, R. N., Kahn, C. R., & Goodyear, L. J.
Affiliations
Joslin Diabetes Center (US)
Corresponding author
Goodyear, Laurie J.
Venue
Molecular and Cellular Biology
Published
2006-11-01
Volume
26
Issue
22
Pages
8217-8227
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2109340122
Cited by
202
References
54
Citations by year
2026: 3 · 2025: 2 · 2024: 6 · 2023: 4 · 2022: 3 · 2021: 6 · 2020: 11 · 2019: 5 · 2018: 12 · 2017: 11 · 2016: 14 · 2015: 10 · 2014: 15 · 2013: 15 · 2012: 10
FWCI
7.21
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK36836, DK-68626, R01DK068626, P30DK036836, P30DK040561)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR45670, R01AR045670, F32AR04662)
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 › Endocrinology, Diabetes and Metabolism › Natural Antidiabetic Agents Studies
Keywords
LKB1, skeletal muscle, insulin sensitivity, glucose homeostasis, TRB3, Akt phosphorylation, AMPK, muscle glucose uptake, tumor suppressor, muscle-specific knockout, glucose tolerance
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Animals, Cell Line, Crosses, Genetic, Female, Glucose, Homeostasis, Insulin Resistance, Male, Multienzyme Complexes, Transcription Factors, Signal Transduction, Trans-Activators, Protein Serine-Threonine Kinases, Mice, Knockout, Muscle, Skeletal, Cell Cycle Proteins, PPAR alpha, Mice, AMP-Activated Protein Kinases

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