Carriers accumulate fewer tangles than noncarriers for a given amount of amyloid, explaining how the gene variant may lower a person’s Alzheimer’s risk.
In the mouse retina, these tender threads connect pericytes on nearby capillaries. They enable cells to coordinate constriction and dilation of blood vessels in response to neuronal activity.
Without the WD domain of Atg16L1, required for a newly discovered type of endocytosis, old mice develop hallmark pathologies of AD.
Dendritic tau suppresses production of nitric oxide, which prevents blood vessels from dilating in response to neural activity.
Grown on doughnut-shaped supports, the cultures survive for years. They offer a versatile system for studying Alzheimer’s disease, the authors claim.
In the Alzheimer’s brain, too, plaques trigger a coordinated inflammatory response from microglia and astrocytes. A preprint paper had shown the same for mice.
A 2018 report that had spotted extra copies of APP lurking in neuronal genomes has come under scrutiny, with claims that the result is due to contamination. Does a response from the original authors bolster their claim?
Three studies agree that TMEM106b/progranulin double knockouts develop more extreme lysosomal dysfunction, inflammation, and motor deficits than PGRN KOs.
TRP cation channels combine with extrasynaptic NMDA glutamate receptors to set off mitochondrial meltdown and cell death. Blocking the interaction stops excitotoxicity.
ApoE4 does so much more strongly than the other known genes collected in a polygenic risk score.
Despite overall falling dementia rates in the U.S., black people remain more susceptible than whites.
The modeling approach reinforces the idea that tau pathology propagates through the brain’s physical architecture, including neuronal networks.
Could this forestall the amyloid cascade and the onset of Alzheimer’s disease?
Neurons take up extracellular vesicles containing tau oligomers more readily than they do free tau. Some gift: This speeds the march of tauopathy through mouse brain.
In both mice and (wo)men, the sex difference comes down to an Aβ-glutamate receptor-prion protein troika.