Cited by 155Cytokine Signaling Pathways and InteractionsAdipokines, Inflammation, and Metabolic DiseasesPI3K/AKT/mTOR signaling in cancer

Regulation of Interleukin-6-induced Hepatic Insulin Resistance by Mammalian Target of Rapamycin through the STAT3-SOCS3 Pathway

Open access
Kim, Jeong-Ho, Kim, Jae Eun, Liu, Hui-Yu, Cao, Wenhong, Chen, Jie·2008·Journal of Biological Chemistry

Abstract

The proinflammatory cytokine interleukin (IL)-6 has been proposed to be one of the mediators that link obesity-derived chronic inflammation with insulin resistance. Signaling through the mammalian target of rapamycin (mTOR) has been found to impact insulin sensitivity under various pathological conditions, through serine phosphorylation and inhibition of insulin receptor substrate by the downstream effector of mTOR, ribosomal S6 kinase 1 (S6K1). However, an involvement of mTOR in IL-6-induced insulin resistance has not yet been reported. Here we show that rapamycin, the inhibitor of mTOR signaling, rescues insulin signaling and glycogen synthesis from IL-6 inhibition in HepG2 hepatocarcinoma cells as well as in mouse primary hepatocytes. IL-6 activates S6K1 in these cells, but unexpectedly, S6K1 is not involved in IL-6 inhibition of insulin signaling, since the effect of IL-6 persists in cells with drastically reduced S6K1 levels induced by RNA interference, suggesting that the function of mTOR signaling is through a mechanism different from the prevailing model of S6K1 phosphorylation of insulin receptor substrate-1. Interestingly, we find that the phosphorylation of STAT3 on Ser(727) and STAT3 transcriptional activity are regulated by mTOR upon IL-6 stimulation and that STAT3 is required for IL-6 inhibition of insulin signaling. Furthermore, IL-6-induced SOCS3 expression is inhibited by rapamycin, and ectopic expression of SOCS3 blocks the ability of rapamycin to enhance insulin sensitivity in the presence of IL-6. Taken together, we propose that mTOR plays a key role in IL-6-induced hepatic insulin resistance by regulating STAT3 activation and subsequent SOCS3 expression.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.m708568200

Cites

52 of 52 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

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?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 53 references couldn’t be matched to a known paper.

Research works printed but not linked: 3

  1. [17]17. Ueki, K., Kondo, T., Tseng, Y. H., and Kahn, C. R. (2004) Proc. Natl. Acad. Sci. U. S. A. 101, 10422-10427
  2. [24]24. Erbay, E., Kim, J. E., and Chen, J. (2005) in Nutrient and Cell Signaling (Zempleni, J., and Dakshinamurti, K., eds) pp. 353-380, CRC Press, Inc., Boca Raton, FL
  3. [48]48. Yeh, W. C., Bierer, B. E., and McKnight, S. L. (1995) Proc. Natl. Acad. Sci. U. S. A. 92, 11086-11090

Cited by

Sorted by citations

Authors
Kim, J.-H., Kim, J. E., Liu, H.-Y., Cao, W., & Chen, J.
Affiliations
  • University of Illinois Urbana-Champaign (US)
  • The Hamner Institutes for Health Sciences (US)
Corresponding author
Chen, Jie
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-01
Volume
283
Issue
2
Pages
708-715
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1989472173
Cited by
154
References
53
Citations by year
2026: 7 · 2025: 8 · 2024: 10 · 2023: 6 · 2022: 6 · 2021: 4 · 2020: 7 · 2019: 3 · 2018: 5 · 2017: 9 · 2016: 5 · 2015: 8 · 2014: 14 · 2013: 12 · 2012: 12
FWCI
4.05
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK076039, R01DK76039)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01 AR48914, R01AR048914)
Topics
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
interleukin-6, hepatic insulin resistance, mTOR signaling, STAT3, SOCS3, S6K1, rapamycin, insulin signaling, glycogen synthesis, obesity-associated inflammation, hepatocytes
MeSH terms
Carcinoma, Hepatocellular, Homeostasis, Humans, Insulin, Insulin Resistance, Liver Neoplasms, Luciferases, Protein Kinases, Recombinant Proteins, Signal Transduction, Interleukin-6, Lentivirus, Genes, Reporter, DNA Primers, Ribosomal Protein S6 Kinases, Sirolimus, RNA Interference, Cell Line, Tumor, TOR Serine-Threonine 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