Cited by 145Metabolism, Diabetes, and CancerCardiovascular and exercise physiologyAdipose Tissue and Metabolism

Skeletal Muscle AMP-activated Protein Kinase Is Essential for the Metabolic Response to Exercise in Vivo

Open access
Lee-Young, Robert S., Griffee, Susan R., Lynes, Sara E., Bracy, Deanna P., Ayala, Julio E., McGuinness, Owen P., Wasserman, David H.·2009·Journal of Biological Chemistry

Abstract

AMP-activated protein kinase (AMPK) has been postulated as a super-metabolic regulator, thought to exert numerous effects on skeletal muscle function, metabolism, and enzymatic signaling. Despite these assertions, little is known regarding the direct role(s) of AMPK in vivo, and results obtained in vitro or in situ are conflicting. Using a chronically catheterized mouse model (carotid artery and jugular vein), we show that AMPK regulates skeletal muscle metabolism in vivo at several levels, with the result that a deficit in AMPK activity markedly impairs exercise tolerance. Compared with wild-type littermates at the same relative exercise capacity, vascular glucose delivery and skeletal muscle glucose uptake were impaired; skeletal muscle ATP degradation was accelerated, and arterial lactate concentrations were increased in mice expressing a kinase-dead AMPKalpha2 subunit (alpha2-KD) in skeletal muscle. Nitric-oxide synthase (NOS) activity was significantly impaired at rest and in response to exercise in alpha2-KD mice; expression of neuronal NOS (NOSmicro) was also reduced. Moreover, complex I and IV activities of the electron transport chain were impaired 32 +/- 8 and 50 +/- 7%, respectively, in skeletal muscle of alpha2-KD mice (p < 0.05 versus wild type), indicative of impaired mitochondrial function. Thus, AMPK regulates neuronal NOSmicro expression, NOS activity, and mitochondrial function in skeletal muscle. In addition, these results clarify the role of AMPK in the control of muscle glucose uptake during exercise. Collectively, these findings demonstrate that AMPK is central to substrate metabolism in vivo, which has important implications for exercise tolerance in health and certain disease states characterized by impaired AMPK activation in skeletal muscle.

Integrity signals

Registry

Crossref · 10.1074/jbc.m109.021048

Cites

55 of 55 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • AMPK α2 KO and α2 KD and α2iTg mice have normal or only modest reductions in glucose uptake during contractions.

    “AMPK α2 KO and α2 KD and α2iTg mice have normal or only modest reductions in glucose uptake during contractions [4,26,31,32,118-120].”

    From AMPK and Exercise: Glucose Uptake and Insulin Sensitivity (2013) · cites this paper as [118]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Lee-Young, R. S., Griffee, S. R., Lynes, S. E., Bracy, D. P., Ayala, J. E., McGuinness, O. P., & Wasserman, D. H.
Affiliations
Vanderbilt University (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-09
Volume
284
Issue
36
Pages
23925-23934
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2034465871
Cited by
145
References
55
Citations by year
2026: 5 · 2025: 4 · 2024: 3 · 2023: 5 · 2022: 8 · 2021: 7 · 2020: 6 · 2019: 5 · 2018: 2 · 2017: 7 · 2016: 13 · 2015: 13 · 2014: 14 · 2013: 14 · 2012: 13
FWCI
5.24
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (U24DK59637, U24DK059637, R01 DK 54902, R01DK054902)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
AMPK, skeletal muscle metabolism, exercise tolerance, muscle glucose uptake, nitric oxide synthase, neuronal nitric oxide synthase, mitochondrial function, electron transport chain, ATP degradation, lactate, substrate metabolism
MeSH terms
Animals, Enzyme Activation, Female, Glucose, Male, Mice, Transgenic, Physical Conditioning, Animal, Physical Endurance, Muscle, Skeletal, Mice, Nitric Oxide Synthase Type I, AMP-Activated Protein Kinases

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review