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Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
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For most patients, experiencing several weeks of polyuria, polydipsia, fatigue, and significant weight loss may indicate the presence of diabetes. Furthermore, adults displaying the phenotypic appearance of type 2 diabetes (particularly those who are obese and not initially insulin-requiring), may have islet cell autoantibodies, suggesting autoimmune-mediated β cell destruction and a diagnosis of latent autoimmune diabetes of adults (LADA). The categorization of glucose homeostasis is...
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The endoplasmic reticulum (ER) of pancreatic β-cells synthesizes preproinsulin, which consists of a signal peptide, A and B chains, and a C-peptide. Preproinsulin is then cleaved and folded into proinsulin, which translocates to the Golgi apparatus for sorting and packaging into secretory granules. In these granules, enzymatic clipping generates insulin and C-peptide.
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Updated: Jun 30, 2025

A High-content In Vitro Pancreatic Islet β-cell Replication Discovery Platform
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Degradation meets development: Implications in β-cell development and diabetes.

Akshaya Ashok1, Guruprasad Kalthur2, Anujith Kumar1

  • 1Manipal Institute of Regenerative Medicine, Bangalore, Manipal Academy of Higher Education, Manipal, India.

Cell Biology International
|March 19, 2024
PubMed
Summary
This summary is machine-generated.

The ubiquitin proteasome system (UPS) regulates pancreatic development by degrading transcription factors. UPS dysfunction is linked to diabetes, offering therapeutic targets for pancreatic beta-cell regeneration.

Keywords:
diabetespancreatic β‐cellsstem cellsubiquitin proteasome systemβ‐cell development

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Area of Science:

  • Cellular Biology
  • Developmental Biology
  • Endocrinology

Background:

  • Pancreatic development relies on precise regulation of stage-specific transcription factors (TFs).
  • Protein turnover, particularly degradation, is critical for TF regulation and cell differentiation.
  • The ubiquitin proteasome system (UPS) is a major pathway for intracellular protein degradation.

Purpose of the Study:

  • To review the critical role of the UPS in pancreatic beta-cell development.
  • To explore how UPS dysfunction contributes to metabolic syndromes like diabetes.
  • To identify potential therapeutic strategies for stem cell-derived beta-cells.

Main Methods:

  • Literature review focusing on the ubiquitin proteasome system (UPS).
  • Analysis of the role of protein degradation in transcription factor turnover.
  • Examination of the link between UPS dysfunction and pancreatic beta-cell function.

Main Results:

  • The UPS is essential for timely degradation of transcription factors during pancreatic development.
  • Dysregulation of the UPS can impair pancreatic beta-cell function and lead to diabetes.
  • Targeting the UPS may offer a strategy for improving beta-cell therapies.

Conclusions:

  • The UPS plays a vital role in normal pancreatic beta-cell development through TF regulation.
  • UPS dysfunction is implicated in the pathogenesis of diabetes.
  • Understanding UPS mechanisms is key for developing effective beta-cell replacement therapies.