Cited by 84Pancreatic function and diabetesCircadian rhythm and melatoninEndoplasmic Reticulum Stress and Disease

Activation of melatonin signaling promotes β-cell survival and function

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Costes, Safia, Boss, Marti, Thomas, Anthony P., Matveyenko, Aleksey V.·2015·Molecular Endocrinology

Abstract

Type 2 diabetes mellitus (T2DM) is characterized by pancreatic islet failure due to loss of β-cell secretory function and mass. Studies have identified a link between a variance in the gene encoding melatonin (MT) receptor 2, T2DM, and impaired insulin secretion. This genetic linkage raises the question whether MT signaling plays a role in regulation of β-cell function and survival in T2DM. To address this postulate, we used INS 832/13 cells to test whether activation of MT signaling attenuates proteotoxicity-induced β-cell apoptosis and through which molecular mechanism. We also used nondiabetic and T2DM human islets to test the potential of MT signaling to attenuate deleterious effects of glucotoxicity and T2DM on β-cell function. MT signaling in β-cells (with duration designed to mimic typical nightly exposure) significantly enhanced activation of the cAMP-dependent signal transduction pathway and attenuated proteotoxicity-induced β-cell apoptosis evidenced by reduced caspase-3 cleavage (∼40%), decreased activation of stress-activated protein kinase/Jun-amino-terminal kinase (∼50%) and diminished oxidative stress response. Activation of MT signaling in human islets was shown to restore glucose-stimulated insulin secretion in islets exposed to chronic hyperglycemia as well as in T2DM islets. Our data suggest that β-cell MT signaling is important for the regulation of β-cell survival and function and implies a preventative and therapeutic potential for preservation of β-cell mass and function in T2DM.

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Authors
Costes, S., Boss, M., Thomas, A. P., & Matveyenko, A. V.
Affiliations
  • University of California, Los Angeles (US)
  • Mayo Clinic (US)
Corresponding author
Matveyenko, Aleksey V.
Venue
Molecular Endocrinology
Published
2015-05-01
Volume
29
Issue
5
Pages
682-692
ISSN
  • 0888-8809 (ISSN-L)
  • 1944-9917
OpenAlex
W2145215846
Cited by
84
References
57
Citations by year
2026: 5 · 2025: 7 · 2024: 4 · 2023: 8 · 2022: 8 · 2021: 6 · 2020: 8 · 2019: 6 · 2018: 11 · 2017: 8 · 2016: 9 · 2015: 4
FWCI
10.74
Type
journal article
Language
en
Open access
Locations
  • Molecular Endocrinology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Larry L. Hillblom Foundation
  • National Institutes of Health
  • University of California, Los Angeles
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK098468)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
Keywords
melatonin signaling, melatonin receptor 2, beta-cell survival, beta-cell apoptosis, type 2 diabetes, proteotoxicity, glucotoxicity, cAMP signaling, JNK, caspase-3, oxidative stress, glucose-stimulated insulin secretion, beta-cell mass, pancreatic islets
MeSH terms
Animals, Cell Survival, Diabetes Mellitus, Type 2, Humans, Melatonin, Signal Transduction, Receptors, Melatonin, Cell Line, Tumor, Insulin-Secreting Cells, Rats

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