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Leprdb Mouse Model of Type 2 Diabetes: Pancreatic Islet Isolation and Live-cell 2-Photon Imaging Of Intact Islets
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Pancreatic islet dysfunction in type 2 diabetes mellitus.

Fei Hu1, Xiaohui Qiu2, Shizhong Bu1

  • 1Diabetes Research Center, School of Medicine, Ningbo University, Ningbo, China.

Archives of Physiology and Biochemistry
|October 9, 2018
PubMed
Summary

Islet dysfunction, a key factor in type 2 diabetes, is linked to islet amyloid accumulation, inflammation, and altered protein signaling. Understanding these risk factors is crucial for addressing hyperglycemia and diabetes development.

Keywords:
Islet dysfunctioncystic fibrosis transmembrane conductance regulatorislet amyloid polypeptideislet inflammationtransforming growth factor-βtype 2 diabetes mellitus

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Area of Science:

  • Endocrinology
  • Cell Biology
  • Diabetology

Background:

  • Islet dysfunction is central to type 2 diabetes mellitus (T2DM).
  • Accumulation of islet amyloid and inflammation, including macrophage infiltration, are implicated in beta-cell dysfunction.
  • The transforming growth factor-beta (TGF-β) superfamily and cystic fibrosis transmembrane-conductance regulator (CFTR) are emerging factors in islet regulation.

Purpose of the Study:

  • To review the multifaceted risk factors contributing to islet dysfunction.
  • To explore the roles of islet amyloid, TGF-β, CFTR, and inflammation in diabetes pathogenesis.
  • To elucidate the mechanisms linking these factors to impaired insulin secretion and hyperglycemia.

Main Methods:

  • This review synthesizes existing literature on islet dysfunction and T2DM.
  • It examines the impact of islet amyloid, TGF-β signaling, CFTR function, and inflammatory processes.
  • Evidence from studies on pancreatic islets and cystic fibrosis patients is considered.

Main Results:

  • Islet amyloid accumulation correlates with beta-cell dysfunction and diabetes.
  • TGF-β superfamily proteins are critical regulators of pancreatic cell function and disease.
  • Inflammation and altered CFTR function contribute to impaired insulin secretion and glucose homeostasis.

Conclusions:

  • Islet dysfunction is driven by a complex interplay of amyloid deposition, inflammatory responses, and dysregulated signaling pathways.
  • These factors collectively lead to hyperglycemia and the development of type 2 diabetes.
  • Further research into these mechanisms may reveal novel therapeutic targets for diabetes.