Cited by 64Adipokines, Inflammation, and Metabolic DiseasesMetabolism, Diabetes, and CancerAdipose Tissue and Metabolism

The Shc locus regulates insulin signaling and adiposity in mammals

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Tomilov, Alexey A., Ramsey, Jon J., Hagopian, Kevork, Giorgio, Marco, Kim, Kyoungmi M., Lam, Adam, Migliaccio, Enrica, Lloyd, Kent C. +4 more·2011·Aging Cell

Abstract

Summary: Longevity of a p66Shc knockout strain (ShcP) was previously attributed to increased stress resistance and altered mitochondria. Microarrays of ShcP tissues indicated alterations in insulin signaling. Consistent with this observation, ShcP mice were more insulin sensitive and glucose tolerant at organismal and tissue levels, as was a novel p66Shc knockout (ShcL). Increasing and decreasing Shc expression in cell lines decreased and increased insulin sensitivity, respectively – consistent with p66Shc’s function as a repressor of insulin signaling. However, differences between the two p66Shc knockout strains were also observed. ShcL mice were fatter and susceptible to fatty diets, and their fat was more insulin sensitive than controls. On the other hand, ShcP mice were leaner and resisted fatty diets, and their adipose was less insulin sensitive than controls. ShcL and ShcP strains are both highly inbred on the C57Bl/6 background, so we investigated gene expression at the Shc locus, which encodes three isoforms, p66, p52, and p46. Isoform p66 is absent in both strains; thus, the remaining difference to which to attribute the ‘lean’ phenotype is expression of the other two isoforms. ShcL mice have a precise deletion of p66Shc and normal expression of p52 and p46Shc isoforms in all tissues; thus, a simple deletion of p66Shc results in a ‘fat’ phenotype. However, ShcP mice in addition to p66Shc deletion have a fourfold increase in p46Shc expression in white fat. Thus, p46Shc overexpression in fat, rather than p66Shc deletion, is the likely cause of decreased adiposity and reduced insulin sensitivity in the fat of ShcP mice, which has implications for the longevity of the strain.

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Crossref · 10.1111/j.1474-9726.2010.00641.x

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Authors
Tomilov, A. A., Ramsey, J. J., Hagopian, K., Giorgio, M., Kim, K. M., Lam, A., Migliaccio, E., Lloyd, K. C., Berniakovich, I., Prolla, T. A., Pelicci, P., & Cortopassi, G. A.
Affiliations
  • University of California, Davis (US)
  • IFOM (IT)
  • University of Wisconsin–Madison (US)
Corresponding author
Cortopassi, Gino A.
Venue
Aging Cell
Publisher
Wiley
Published
2010-11-15
Volume
10
Issue
1
Pages
55-65
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W1756960484
Cited by
64
References
51
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 5 · 2021: 4 · 2020: 5 · 2019: 2 · 2018: 4 · 2017: 5 · 2016: 7 · 2015: 2 · 2014: 7 · 2013: 9 · 2012: 4
FWCI
3.49
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Funders
  • U.S. Public Health Service
  • National Institute on Aging (AG16719, AG025532, P01AG025532, R01AG016719)
  • National Eye Institute (R01EY012245, EY 12245)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
p66Shc, insulin signaling, insulin sensitivity, adiposity, white adipose tissue, glucose tolerance, longevity, fatty diet, stress tolerance, mitochondria
MeSH terms
Src Homology 2 Domain-Containing, Transforming Protein 1, Animals, Cells, Cultured, Dietary Fats, Female, Glucose, Insulin, Insulin Resistance, Longevity, Male, Mice, Inbred C57BL, Thinness, Signal Transduction, Mice, Knockout, Oxidative Stress, Protein Isoforms, Oligonucleotide Array Sequence Analysis, Adiposity, Mice, Shc Signaling Adaptor Proteins, Genetic Loci

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