The incretin hormones glucagonlike peptide 1 and glucose‐dependent insulinotropic polypeptide are neuroprotective in mouse models of Alzheimer's disease

Feb 18, 2014Alzheimer's & dementia : the journal of the Alzheimer's Association

The hormones GLP-1 and GIP may protect brain cells in mouse models of Alzheimer's disease

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Abstract

Liraglutide, lixisenatide, and D-Ala2-GIP cross the blood-brain barrier and show multiple beneficial effects in a mouse model of Alzheimer's disease.

  • These incretin mimetics prevent memory formation impairment and enhance synaptic plasticity.
  • They increase the number of synapses and reduce the load of amyloid plaques and soluble amyloid-β levels.
  • Oxidative stress and chronic inflammation in the brain are reduced with these treatments.
  • The proliferation of neuronal progenitor cells is enhanced, resulting in increased neurogenesis in the dentate gyrus.
  • Liraglutide treatment normalizes glucose metabolism in forebrain areas, indicating restored neuronal metabolic activity.

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