Cited by 70Adipose Tissue and MetabolismMetabolism, Diabetes, and CancerMitochondrial Function and Pathology

Paradoxical effect of mitochondrial respiratory chain impairment on insulin signaling and glucose transport in adipose cells.

Open access
Shi, Xiarong, Burkart, Alison, Nicoloro, Sarah M., Czech, Michael P., Straubhaar, Juerg, Corvera, Silvia·2008·Journal of Biological Chemistry

Abstract

Adipocyte function is crucial for the control of whole body energy homeostasis. Pathway analysis of differentiating 3T3-L1 adipocytes reveals that major metabolic pathways induced during differentiation involve mitochondrial function. However, it is not clear why differentiated white adipocytes require enhanced respiratory chain activity relative to pre-adipocytes. To address this question, we used small interference RNA to interfere with the induction of the transcription factor Tfam, which is highly induced between days 2 and 4 of differentiation and is crucial for replication of mitochondrial DNA. Interference with Tfam resulted in cells with decreased respiratory chain capacity, reflected by decreased basal oxygen consumption, and decreased mitochondrial ATP synthesis, but no difference in many other adipocyte functions or expression levels of adipose-specific genes. However, insulin-stimulated GLUT4 translocation to the cell surface and subsequent glucose transport are impaired in Tfam knockdown cells. Paradoxically, insulin-stimulated Akt phosphorylation is significantly enhanced in these cells. These studies reveal independent links between mitochondrial function, insulin signaling, and glucose transport, in which impaired respiratory chain activity enhances insulin signaling to Akt phosphorylation, but impairs GLUT4 translocation. These results indicate that mitochondrial respiratory chain dysfunction in adipocytes can cause impaired insulin responsiveness of GLUT4 translocation by a mechanism downstream of the Akt protein kinase.

Integrity signals

Registry

Crossref · 10.1074/jbc.m800510200

Cites

48 of 48 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?

  • Among the mitochondrial functions that may be relevant for white adipose tissue function are the anaplerotic generation of metabolic intermediates for fatty acid synthesis and esterification, the maintenance of a robust pathway for the folding and secretion of high abundance circulating proteins such as adiponectin, and interactions between mitochondrial function and components of the insulin-sign

    “Among the mitochondrial functions that may be relevant for white adipose tissue function are the anaplerotic generation of metabolic intermediates for fatty acid synthesis and esterification (159), the maintenance of a robust pathway for the folding and secretion of high abundance circulating proteins such as adiponectin (160), and interactions between mitochondrial function and components of the”
  • Decreased mitochondrial capacity in adipocytes may also alter adipocyte insulin sensitivity and/or function due to the high energetic requirements for fatty acid storage, adipokine secretion, insulin signaling, and glucose uptake.

    “In addition to effects on fuel utilization, decreased mitochondrial capacity in adipocytes may also alter adipocyte insulin sensitivity and/or function due to the high energetic requirements for fatty acid storage, adipokine secretion (160), insulin signaling (161), and glucose uptake.”
  • In cultured adipocytes, impairment of respiratory chain function through depletion of Tfam during adipocyte differentiation results in impaired insulin-stimulated glucose transport.

    “Interestingly, in cultured adipocytes, impairment of respiratory chain function through depletion of Tfam during adipocyte differentiation results in impaired insulinstimulated glucose transport (161); data in animal models are necessary to determine the physiological relevance of this finding.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Shi, X., Burkart, A., Nicoloro, S. M., Czech, M. P., Straubhaar, J., & Corvera, S.
Affiliations
University of Massachusetts Chan Medical School (US)
Corresponding author
Corvera, Silvia
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-11
Volume
283
Issue
45
Pages
30658-30667
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2066447432
Cited by
70
References
48
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 2 · 2022: 5 · 2021: 1 · 2020: 2 · 2019: 9 · 2018: 2 · 2017: 2 · 2016: 4 · 2015: 7 · 2014: 1 · 2013: 6 · 2012: 5
FWCI
3.78
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (DK 32520, DK-60837, P30DK032520, R01DK060837)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
mitochondrial respiratory chain, adipocytes, insulin signaling, glucose transport, GLUT4 translocation, Akt phosphorylation, TFAM, 3T3-L1 adipocyte differentiation, mitochondrial function, insulin resistance, white adipose tissue
MeSH terms
Adenosine Triphosphate, Animals, Biological Transport, Cell Differentiation, DNA-Binding Proteins, Electron Transport, Glucose, High Mobility Group Proteins, Hypoglycemic Agents, Insulin, Mitochondria, Oxygen Consumption, Phosphorylation, Time Factors, Signal Transduction, Adipocytes, RNA, Small Interfering, 3T3-L1 Cells, Proto-Oncogene Proteins c-akt, Glucose Transporter Type 4, Mice

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