Cited by 65Pancreatic function and diabetesAdipokines, Inflammation, and Metabolic DiseasesDiabetes Treatment and Management

Irisin Ameliorates Glucolipotoxicity-Associated β-Cell Dysfunction and Apoptosis via AMPK Signaling and Anti-Inflammatory Actions

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Zhang, Dan, Xie, Ting, Leung, Po Sing·2018·Cellular Physiology and Biochemistry

Abstract

Background/Aims: Islet metabolic disorder and inflammation contribute to the pathogenesis and progression of type 2 diabetes mellitus (T2DM). Irisin is a recently identified adipomyokine with protective effects on metabolic homeostasis and inflammation-suppressing effects in hepatic and vascular cells. The present study examined the effects of irisin on lipid metabolism and inflammation in β cells under glucolipotoxic conditions. Methods: Rat INS-1E β cells and islets isolated from C57BL/6 mice were incubated in glucolipotoxic conditions with or without irisin. Intracellular lipid contents and lipogenic gene expression were determined by enzymatic colorimetric assays and real-time PCR, respectively. Inflammatory status was evidenced by Western blot analysis for the phosphorylation of nuclear factor-κB (NF-κB) p65 and real-time PCR analysis for the expression of pro-inflammatory genes. Results: Irisin reversed glucolipotoxicity-induced intracellular non-esterified fatty acid (NEFA) and triglyceride accumulation, suppressed associated elevations in lipogenic gene expression, and phosphorylated acetyl-CoA-carboxylase (ACC) in INS-1E cells. These demonstrated effects were dependent on irisin-activated adenosine monophosphate-activated protein kinase (AMPK). Meanwhile, AMPK signaling mediated the protective effects of irisin on INS-1E cell insulin secretory ability and survival as well. Additionally, irisin inhibited phosphorylation of NF-κB p65 while decreasing the expression of pro-inflammatory genes in INS-1E cells under glucolipotoxic conditions. Moreover, irisin also improved insulin secretion, inhibited apoptosis, and restored β-cell function-related gene expression in isolated mouse islets under glucolipotoxic conditions. Conclusion: Irisin attenuated excessive lipogenesis in INS-1E cells under glucolipotoxic state through activation of AMPK. Irisin also suppressed overnutrition-induced inflammation in INS-1E cells. Our findings implicate irisin as a promising therapeutic target for the treatment of islet lipid metabolic disorder and islet inflammation in T2DM.

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Crossref · 10.1159/000495395

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  • Other exercise-induced factors, such as irisin, follistatin, and OCN, directly protect β-cells from damage, further potentiating their beneficial metabolic properties.

    “Concurrently, other exercise-induced factors, such as irisin [66], follistatin [183], and OCN [209], directly protect β-cells from damage, further potentiating their beneficial metabolic properties.”
  • In vitro, irisin prevented excessive lipogenesis of mouse islets under glucolipotoxic conditions, improving insulin secretion, inhibiting apoptosis and restoring β-cell function-related gene expression.

    “In vitro, irisin prevented excessive lipogenesis of mouse islets under glucolipotoxic conditions, resulting in improved insulin secretion, inhibition of apoptosis and restored β-cell function-related gene expression117.”

    From Exerkines in health, resilience and disease (2022) · cites this paper as [117]

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Authors
Zhang, D., Xie, T., & Leung, P. S.
Affiliations
Chinese University of Hong Kong (HK)
Venue
Cellular Physiology and Biochemistry
Publisher
S. Karger AG
Published
2018
Volume
51
Issue
2
Pages
924-937
ISSN
  • 1015-8987 (ISSN-L)
  • 1421-9778
OpenAlex
W2901472381
Cited by
65
References
42
Citations by year
2026: 3 · 2025: 3 · 2024: 9 · 2023: 7 · 2022: 13 · 2021: 11 · 2020: 10 · 2019: 9
FWCI
7.85
Type
journal article
Language
en
Open access
Locations
  • Cellular Physiology and Biochemistry (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
irisin, glucolipotoxicity, beta-cell dysfunction, beta-cell apoptosis, AMPK signaling, NF-κB p65, insulitis, lipogenesis, free fatty acids, triglyceride accumulation, acetyl-CoA carboxylase, insulin secretion, type 2 diabetes, INS-1E cells
MeSH terms
Insulin Secretion, Acetyl-CoA Carboxylase, Animals, Anti-Inflammatory Agents, Fatty Acids, Nonesterified, Fibronectins, Glucose, Mice, Inbred C57BL, Phosphorylation, Triglycerides, Signal Transduction, Apoptosis, Proto-Oncogene Proteins c-bcl-2, Palmitic Acid, Insulin-Secreting Cells, Glucose Transporter Type 2, Mice, Rats, Transcription Factor RelA, AMP-Activated Protein Kinases

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