Cited by 147Metabolism, Diabetes, and CancerAdipose Tissue and MetabolismDiabetes, Cardiovascular Risks, and Lipoproteins

TBC1D1 Regulates Insulin- and Contraction-Induced Glucose Transport in Mouse Skeletal Muscle

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An, Ding, Toyoda, Taro, Taylor, Eric B., Yu, Haiyan, Fujii, Nobuharu, Hirshman, Michael F., Goodyear, Laurie J.·2010·Diabetes

Abstract

OBJECTIVE: TBC1D1 is a member of the TBC1 Rab-GTPase family of proteins and is highly expressed in skeletal muscle. Insulin and contraction increase TBC1D1 phosphorylation on phospho-Akt substrate motifs (PASs), but the function of TBC1D1 in muscle is not known. Genetic linkage analyses show a TBC1D1 R125W missense variant confers risk for severe obesity in humans. The objective of this study was to determine whether TBC1D1 regulates glucose transport in skeletal muscle. RESEARCH DESIGN AND METHODS: In vivo gene injection and electroporation were used to overexpress wild-type and several mutant TBC1D1 proteins in mouse tibialis anterior muscles, and glucose transport was measured in vivo. RESULTS: Expression of the obesity-associated R125W mutant significantly decreased insulin-stimulated glucose transport in the absence of changes in TBC1D1 PAS phosphorylation. Simultaneous expression of an inactive Rab-GTPase (GAP) domain of TBC1D1 in the R125W mutant reversed this decrease in glucose transport caused by the R125W mutant. Surprisingly, expression of TBC1D1 mutated to Ala on four conserved Akt and/or AMP-activated protein kinase predicted phosphorylation sites (4P) had no effect on insulin-stimulated glucose transport. In contrast, expression of the TBC1D1 4P mutant decreased contraction-stimulated glucose transport, an effect prevented by concomitant disruption of TBC1D1 Rab-GAP activity. There was no effect of the R125W mutation on contraction-stimulated glucose transport. CONCLUSIONS: TBC1D1 regulates both insulin- and contraction-stimulated glucose transport, and this occurs via distinct mechanisms. The R125W mutation of TBC1D1 impairs skeletal muscle glucose transport, which could be a mechanism for the obesity associated with this mutation.

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  • TBC1D1 is phosphorylated in response to AICAR and muscle contractions/exercise.

    “Like TBC1D4, TBC1D1 is phosphorylated in response to AICAR and muscle contractions/exercise [74,95,101,102,117].”

    From AMPK and Exercise: Glucose Uptake and Insulin Sensitivity (2013) · cites this paper as [95]

  • In response to muscle contractions, increases in TBC1D1 phosphorylation are important for 14-3-3 binding, inhibition of GAP domain function and subsequent increases in glucose uptake.

    “In response to muscle contractions, increases in TBC1D1 phosphorylation are important for 14-3-3 binding, inhibition of GAP domain function and subsequent increases in glucose uptake [95,102].”

    From AMPK and Exercise: Glucose Uptake and Insulin Sensitivity (2013) · cites this paper as [95]

  • Inactivating 4 predicted TBC1D1 phosphorylation sites (4P mutant) results in 25% to 30% reduction in contraction-mediated glucose uptake.

    “Interestingly, two separate studies inactivating 4 predicated TBC1D1 phosphorylation sites (4P mutant) results in 25% to 30% reduction in contraction-mediated glucose uptake [95,102].”

    From AMPK and Exercise: Glucose Uptake and Insulin Sensitivity (2013) · cites this paper as [95]

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Authors
An, D., Toyoda, T., Taylor, E. B., Yu, H., Fujii, N., Hirshman, M. F., & Goodyear, L. J.
Affiliations
  • Joslin Diabetes Center (US)
  • Research Division, Joslin Diabetes Center, Boston, Massachusetts; and
  • Brigham and Women's Hospital (US)
Corresponding author
Goodyear, Laurie J.
Venue
Diabetes
Published
2010-03-18
Volume
59
Issue
6
Pages
1358-1365
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2147249344
Cited by
147
References
35
Citations by year
2026: 3 · 2025: 2 · 2024: 7 · 2023: 3 · 2022: 5 · 2021: 10 · 2020: 10 · 2019: 9 · 2018: 9 · 2017: 6 · 2016: 12 · 2015: 15 · 2014: 12 · 2013: 13 · 2012: 10
FWCI
5.74
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (F32DK075851, P30DK036836)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR042238, R01AR045670, R01-AR45670, R01-AR-42238)
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 › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
TBC1D1, Rab GTPases, skeletal muscle glucose transport, insulin-stimulated glucose transport, obesity
MeSH terms
Animals, Biological Transport, Gene Expression Regulation, Glucose, Insulin, Muscle Contraction, Mutation, Nuclear Proteins, Obesity, Polymerase Chain Reaction, 3T3 Cells, Adipocytes, DNA Primers, DNA, Complementary, Muscle, Skeletal, GTPase-Activating Proteins, Glucose Transporter Type 4, Mice

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