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Related Concept Videos

Cell Specific Gene Expression01:58

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...

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A Method for Mouse Pancreatic Islet Isolation and Intracellular cAMP Determination
12:33

A Method for Mouse Pancreatic Islet Isolation and Intracellular cAMP Determination

Published on: June 25, 2014

Aging induces a distinct gene expression program in mouse islets.

Matthew M Rankin1, Jake A Kushner

  • 1Division of Endocrinology and Diabetes, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA USA.

Islets
|November 25, 2010
PubMed
Summary
This summary is machine-generated.

Aging significantly alters gene expression in pancreatic islets, impacting beta-cell regeneration. Aged islets show a unique signature, contributing to reduced regenerative capacity and potentially type 2 diabetes pathogenesis.

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Area of Science:

  • Endocrinology
  • Molecular Biology
  • Gerontology

Background:

  • The role of aging in type 2 diabetes pathogenesis is unclear.
  • Adult beta-cells were previously thought to have high turnover, but this declines with age.
  • Aged islets may possess a distinct gene expression profile.

Purpose of the Study:

  • To investigate the gene expression changes in aged islets.
  • To understand how aging affects beta-cell adaptive proliferation and regenerative capacity.

Main Methods:

  • Compared gene expression in islets from young and aged mice under basal conditions.
  • Analyzed gene expression in young mice islets post-partial pancreatectomy.
  • Examined gene expression in aged mice islets post-partial pancreatectomy.

Main Results:

  • Aging alters islet gene expression, including genes for chromatin remodeling, RNA binding, and transcription factors.
  • Partial pancreatectomy induces regenerative (Reg) gene expression in aged islets, despite reduced proliferation capacity.
  • The gene expression programs induced by partial pancreatectomy differ significantly between young and aged mice islets.

Conclusions:

  • Aged islets have a unique gene expression signature.
  • This signature may explain the diminished regenerative potential of beta-cells in aging.
  • Understanding these changes is crucial for addressing age-related type 2 diabetes.