Immunometabolism Reframes Alzheimer’s Disease: From Systemic Dysmetabolism to Glial Rewiring

Feb 13, 2026Cellular and molecular neurobiology

How Immune and Metabolic Changes Link Body-Wide Imbalance to Brain Support Cell Changes in Alzheimer's Disease

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Abstract

Alzheimer's disease is associated with dysregulated at the neurovascular-glia-neuron interface.

  • Systemic metabolic stressors such as insulin resistance and obesity may reprogram brain immune cells and sustain inflammation.
  • In microglia, changes in energy pathways could influence the clearance of amyloid and tau proteins, affecting synaptic health.
  • Impaired delivery of nutrients in the brain, linked to endothelial GLUT1 loss, may accelerate amyloid buildup and neuronal damage.
  • Lipid metabolism is connected to inflammation, with APOE4-related changes in microglial lipid droplets potentially linking genetics to inflammatory responses.
  • NLRP3 may play a role in integrating metabolic signals into ongoing neuroinflammation.
  • Emerging metabolic treatments, such as GLP-1 receptor agonists and SGLT2 inhibitors, could modify glial metabolism and inflammation.

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Key numbers

40%
Global Dementia Burden Contribution
Estimated contribution of metabolic dysfunction to global dementia burden.
50%
Increased Dementia Risk from Type 2 Diabetes
Approximate increase in dementia risk associated with type 2 diabetes.

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