Cited by 168Muscle Physiology and DisordersAdipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic Diseases

Adiponectin is expressed by skeletal muscle fibers and influences muscle phenotype and function

Open access
Krause, Matthew P., Liu, Ying, Vu, Vivian, Chan, Lawrence, Xu, Aimin, Riddell, Michael C., Sweeney, Gary, Hawke, Thomas J.·2008·American Journal of Physiology-Cell Physiology

Abstract

Adiponectin (Ad) is linked to various disease states and mediates antidiabetic and anti-inflammatory effects. While it was originally thought that Ad expression was limited to adipocytes, we demonstrate here that Ad is expressed in mouse skeletal muscles and within differentiated L6 myotubes, as assessed by RT-PCR, Western blot, and immunohistochemical analyses. Serial muscle sections stained for fiber type, lipid content, and Ad revealed that muscle fibers with elevated intramyocellular Ad expression were consistently type IIA and IID fibers with detectably higher intramyocellular lipid (IMCL) content. To determine the effect of Ad on muscle phenotype and function, we used an Ad-null [knockout (KO)] mouse model. Body mass increased significantly in 24-wk-old KO mice [+5.5 +/- 3% relative to wild-type mice (WT)], with no change in muscle mass observed. IMCL content was significantly increased (+75.1 +/- 25%), whereas epididymal fat mass, although elevated, was not different in the KO mice compared with WT (+35.1 +/- 23%; P = 0.16). Fiber-type composition was unaltered, although type IIB fiber area was increased in KO mice (+25.5 +/- 6%). In situ muscle stimulation revealed lower peak tetanic forces in KO mice relative to WT (-47.5 +/- 6%), with no change in low-frequency fatigue rates. These data demonstrate that the absence of Ad expression causes contractile dysfunction and phenotypical changes in skeletal muscle. Furthermore, we demonstrate that Ad is expressed in skeletal muscle and that its intramyocellular localization is associated with elevated IMCL, particularly in type IIA/D fibers.

Integrity signals

Registry

Crossref · 10.1152/ajpcell.00030.2008

Cites

33 of 33 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?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Krause, M. P., Liu, Y., Vu, V., Chan, L., Xu, A., Riddell, M. C., Sweeney, G., & Hawke, T. J.
Affiliations
York University (CA)
Venue
American Journal of Physiology-Cell Physiology
Published
2008-07
Volume
295
Issue
1
Pages
C203-C212
ISSN
  • 0363-6143 (ISSN-L)
  • 1522-1563
OpenAlex
W2072137305
Cited by
168
References
33
Citations by year
2026: 4 · 2025: 8 · 2024: 4 · 2023: 8 · 2022: 13 · 2021: 13 · 2020: 10 · 2019: 9 · 2018: 6 · 2017: 8 · 2016: 9 · 2015: 12 · 2014: 7 · 2013: 11 · 2012: 17
FWCI
3.97
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Cell Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • The HKU Scholars Hub (University of Hong Kong) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
adiponectin, skeletal muscle, intramyocellular lipid, muscle fiber type, type IIA fibers, type IIb muscle fibers, muscle contractility, adiponectin knockout mice, muscle hypertrophy, epididymal adipose tissue, muscle fatigue, L6 myotubes
MeSH terms
Animals, Cell Line, Phenotype, Mice, Knockout, Muscle, Skeletal, Muscle Fibers, Skeletal, Mice, Adiponectin

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