Cited by 24Pancreatic function and diabetesEndoplasmic Reticulum Stress and DiseaseDiabetes and associated disorders

A novel mechanism regulating insulin secretion involving Herpud1 in mice

Wong, N., Morahan, G., Stathopoulos, M., Proietto, J., Andrikopoulos, S.·2013·Diabetologia

Abstract

Aims/hypothesis Type 2 diabetes results from beta cell dysfunction after prolonged physiological stress, which causes oversecretion of insulin. We recently found that insulin hypersecretion is mediated by at least two genes. Among mouse models of type 2 diabetes, the DBA/2 mouse strain is more susceptible to diabetes than is the C57BL/6J (B6J) strain. One distinctive feature of the DBA/2 mouse is that it hypersecretes insulin, independent of changes in insulin sensitivity; we identified Nnt as a gene responsible for this trait.Methods To identify the other gene(s) affecting insulin hypersecretion, we tested a panel of recombinant inbred BXD strains, which have different combinations of B6 and DBA/2 alleles.Results We found that 25% of the BXD strains hypersecreted insulin in response to glucose. Microarray profiling of islets from high- and low-secretor strains showed that at least four genes were differentially expressed. One gene was consistently underexpressed in islets from both DBA/2 and the high-secretor BXD strains. This gene (Herpud1 or Herp) encodes the 54 kDa endoplasmic reticulum stress-inducible protein (HERP) that resides in the integral endoplasmic reticulum membrane. To test directly whether Herpud1 can interact with Nnt, Herpud1 was either knocked down or overexpressed in MIN6 cells. These results showed that when Herpud1 was suppressed, Nnt expression was reduced, while overexpression of Herpud1 led to increased Nnt expression. Furthermore, Herpud1 suppression resulted in significantly decreased glucose-stimulated insulin secretion in the DBA/2 islets but not B6J islets.Conclusions/interpretation We conclude that Herpud1 regulates insulin secretion via control of Nnt expression.

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Crossref · 10.1007/s00125-013-2908-y

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Authors
Wong, N., Morahan, G., Stathopoulos, M., Proietto, J., & Andrikopoulos, S.
Affiliations
  • The University of Melbourne (AU)
  • Harry Perkins Institute of Medical Research (AU)
Corresponding author
Wong, N.
Venue
Diabetologia
Published
2013-04-26
Volume
56
Issue
7
Pages
1569-1576
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W2018384382
Cited by
24
References
37
Citations by year
2026: 1 · 2024: 2 · 2023: 3 · 2021: 2 · 2020: 4 · 2019: 1 · 2018: 3 · 2017: 2 · 2016: 4 · 2014: 2
FWCI
1.97
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
Keywords
HERPUD1, Herp, insulin secretion, insulin hypersecretion, type 2 diabetes, beta-cell dysfunction, NNT, endoplasmic reticulum stress, islets, DBA/2 mice, BXD recombinant inbred mice, glucose-stimulated insulin secretion, MIN6 cells, gene expression regulation
MeSH terms
Animals, Enzyme-Linked Immunosorbent Assay, Insulin, Membrane Proteins, Mice, Inbred C57BL, Mice, Inbred DBA, Blotting, Western, Mitochondrial Proteins, Mice, Real-Time Polymerase Chain Reaction, NADP Transhydrogenase, AB-Specific

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