Cited by 96Growth Hormone and Insulin-like Growth FactorsMetabolism, Diabetes, and CancerCell death mechanisms and regulation

Differential Roles of Insulin Receptor Substrates in the Anti-apoptotic Function of Insulin-like Growth Factor-1 and Insulin

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Tseng, Yu-Hua, Ueki, Kohjiro, Kriauciunas, Kristina M., Kahn, C. Ronald·2002·Journal of Biological Chemistry

Abstract

Insulin-like growth factor-1 (IGF-1) and insulin are known to prevent apoptosis. The signaling network of IGF-1 and insulin occurs via multiple pathways involving different insulin receptor substrates (IRSs). To define their roles in the anti-apoptotic function of IGF-1 and insulin, we established brown pre-adipocyte cell lines from wild-type and IRS knockout (KO) animals. In response to 16 h of serum deprivation, IRS-1-deficient cells showed a significant decrease in response to IGF-1 protection from apoptosis, whereas no changes were observed in the IRS-2, IRS-3, or IRS-4 KO cells. Five hours after serum withdrawal, cells already began to undergo apoptosis. At this early time point, IGF-1 and insulin were able to protect both wild-type and IRS-1 KO cells from death by 85-90%. After a longer period of serum deprivation, the protective ability of insulin and IGF-1 was decreased, and this was especially reduced in the IRS-1 KO cells. Reconstitution of these cells with IRS-1, IRS-2, IRS-3, or IRS-1/IRS-2 chimeras restored the anti-apoptotic effects of IGF-1, whereas overexpression of IRS-4 had no effect at long time points and actually reduced the effect of IGF-1 at the short time point. The biochemical basis of the defect in anti-apoptosis was not dependent on phosphorylation of mitogen-activated protein kinase; whereas phosphoinositide 3-kinase activity was decreased by 30% in IRS-1 KO cells. Akt phosphorylation was slightly reduced in these cells. Phosphorylation of the transcription factors cAMP response element-binding protein and FKHR by IGF-1 and insulin was markedly reduced in IRS-1 KO cells. In addition, both IGF-1 and insulin prevented caspase-3 cleavage in the wild-type cells, and this effect was greatly reduced in the IRS-1-deficient cells. These findings suggest that the IRS proteins may play differential roles in the anti-apoptotic effects of IGF-1 and insulin in brown pre-adipocytes, with IRS-1 being predominant, possibly acting through caspase-3-, CREB-, and FKHR-dependent mechanisms.

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  • The insulin/IGF-1 signaling system exerts an essential role in brown fat differentiation and function.

    “In addition, the insulin/IGF-1 signaling system also exerts an essential role in brown fat differentiation and function (Figure 3).”

    From Cellular bioenergetics as a target for obesity therapy (2010) · cites this paper as [111]

  • Both insulin and IGF-1 protect brown precursor cells from apoptosis, and this effect is mainly mediated by IRS-1.

    “Both insulin and IGF-1 protect these precursor cells from apoptosis, and this effect is mainly mediated by IRS-1 111.”

    From Cellular bioenergetics as a target for obesity therapy (2010) · cites this paper as [111]

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Authors
Tseng, Y.-H., Ueki, K., Kriauciunas, K. M., & Kahn, C. R.
Affiliations
Joslin Diabetes Center (US)
Corresponding author
Kahn, C. Ronald
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-08
Volume
277
Issue
35
Pages
31601-31611
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2058009015
Cited by
96
References
53
Citations by year
2022: 1 · 2020: 1 · 2019: 2 · 2018: 3 · 2017: 6 · 2016: 3 · 2015: 2 · 2014: 6 · 2013: 4 · 2012: 3
FWCI
4.96
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 (R01DK055545, DK 33201, DK101183, R01DK033201, DK55545)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
insulin receptor substrate, insulin-like growth factor I, insulin, anti-apoptotic signaling, apoptosis, IRS-1, insulin receptor substrate 2, insulin receptor substrate 3, serum deprivation, phosphatidylinositol 3-kinase, Akt, CREB, FOXO1, caspase-3
MeSH terms
Animals, Cell Line, Cells, Cultured, Insulin, Insulin-Like Growth Factor I, Kinetics, Phosphoproteins, Receptor, Insulin, Recombinant Fusion Proteins, Recombinant Proteins, Transfection, Culture Media, Serum-Free, Apoptosis, Mice, Knockout, Mitogen-Activated Protein Kinases, Intracellular Signaling Peptides and Proteins, Mitogen-Activated Protein Kinase 3, Mice, Insulin Receptor Substrate Proteins

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