First Primate Model of Familial AD: Marmosets with Presenilin Mutation
Three young monkeys missing exon 9 of presenilin 1 seem to have an elevated Aβ42/40 ratio. It remains to be seen if they will develop plaques and tangles as they age.
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Three young monkeys missing exon 9 of presenilin 1 seem to have an elevated Aβ42/40 ratio. It remains to be seen if they will develop plaques and tangles as they age.
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.
Without the WD domain of Atg16L1, required for a newly discovered type of endocytosis, old mice develop hallmark pathologies of AD.
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.
Dendritic tau suppresses production of nitric oxide, which prevents blood vessels from dilating in response to neural activity.
The designer chimera stabilizes synapses in various mouse models of neurodegenerative disease.
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.
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.
This early marker distinguishes Alzheimer’s from controls and other neurodegenerative diseases more accurately than other biomarkers.
In large population datasets, people who had been vaccinated against influenza or pneumonia appeared less likely to develop AD.
AMX0035, a mix of sodium phenylbutyrate and taurursodiol, slowed functional decline over six months by about as much as the approved ALS drug edaravone.
Comprising mostly Aβ40, these large plaques are shot through with strange tubular structures and BBB markers. They are common in early onset AD.
Expert panel concludes there’s little risk based on current evidence.
A new single-nucleus RNA-Seq study of 3,900 endothelial cells finds a boost in angiogenesis and antigen presentation genes, drawing attention to the vascular component of AD.