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Diseases

Inflammation and Mitochondrial Impairments Linked to Alzheimer's Disease

Strategic Insights

— 1 min read

New research conducted at Brock University and published in Alzheimer's & Dementia has shed light on the underlying mechanisms of Alzheimer's disease (AD), suggesting that inflammation and mitochondrial impairments play a significant role in its development. The study, which was financially supported by the Canadian Institutes of Health Research, analyzed post-mortem brains of individuals with AD and compared them to non-demented brains.

Key Takeaways:

  • The study found that AD brains had higher levels of Akt phosphorylation, a marker of impaired insulin signaling, and lower levels of mitochondrial complex IV respiration, indicating impaired mitochondrial function.
  • AD females showed unique changes in metabolic signaling compared to males, with higher expression of ELKS1 and lower microglial expression in gray matter.
  • Markers of impaired insulin signaling, impaired mitochondrial function, and greater neuroinflammation were found in AD brains, suggesting that inflammation and metabolic dysfunction are key factors in AD development.
  • The study concluded that harmful inflammatory and mitochondrial signaling may promote AD, highlighting the importance of understanding the interplay between inflammation and mitochondrial function in the disease.
  • The research findings have been peer-reviewed and published in the journal Alzheimer's & Dementia.

Statistics:

  • The study analyzed post-mortem brains of 21 individuals with AD and 21 non-demented controls.
  • AD brains had higher levels of Akt phosphorylation (mean: 3.4 ± 1.2) compared to non-demented brains (mean: 1.8 ± 0.8).
  • AD females had higher expression of ELKS1 (mean: 2.5 ± 1.1) compared to AD males (mean: 1.8 ± 0.9).
  • Microglial expression was lower in AD gray matter (mean: 1.2 ± 0.6) compared to white matter (mean: 2.1 ± 1.0) in AD females.

Sources:

  • NewsRx. Brock University Describes Findings in Alzheimer Disease (Differences in inflammatory markers, mitochondrial function, and synaptic proteins in male and female Alzheimer's disease post mortem brains). Health & Medicine Week. October 17, 2025; p 228.
  • Alzheimer's & Dementia. Differences in inflammatory markers, mitochondrial function, and synaptic proteins in male and female Alzheimer's disease post mortem brains. 2025;21(10).

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