Islet amyloid protein and Aβ fibrils share similar folds.
In seven papers, researchers presented a dazzling set of findings gleaned from 125,748 exomes and 15,708 genomes housed in a new database. Tidbits emerge on tau, LRRK2, and other proteins implicated in neurodegeneration.
New research suggests the R47H variant protects neurons from neurodegeneration, raising questions about staging and direction of future TREM2-based therapy.
As the SARS-Cov-2 infection peak passes in some areas, scientists are resuming lab work and clinical studies, albeit with new safety protocols in place. Regions differ greatly in how fast they can reopen.
Many Alzheimer’s trials had minimal dosing interruptions, but recruitment stopped for a time. Others trials fared worse, with some scrapped altogether. One administered study drug in an ambulance.
When these tiny mural cells carried APOE4, they secreted more ApoE, causing Aβ to deposit in capillary walls. Blocking ApoE production prevented angiopathy.
By suppressing a single gene, scientists triggered the transformation of astrocytes into neurons in the mouse substantia nigra, where the converts released dopamine and connected with the striatum.
A GWAS of co-expression modules identifies a haplotype that disrupts lysosomes and myelination. ApoE4 and Aβ regulate the same module.
Alector’s AL002c antibody mobilizes microglia, reduces neuronal dystrophy, and restores normal behavior—all in mice. The clinical version is in Phase 1.
A mouse study claims that the small GTPase restrains pro-inflammatory responses in microglia. Aβ oligomers inhibit RhoA, promoting Aβ deposition and neurodegeneration.
Live imaging of mouse brain reveals that microglia quickly engulf cell bodies while astrocytes dispose of the neuron’s more distal reaches. The cleanup crew tires with age.
A postmortem study found that people who had more aggregation-prone, hyperphosphorylated, oligomeric forms of tau in their brains also had a more aggressive form of Alzheimer’s disease during life. Will we personalize tauopathy care like cancer care?
Cognitive enrichment in early life correlated with less Alzheimer’s pathology, and slower cognitive decline, in late life.
Sex-specific polygenic hazard scores predict pathology and cognitive decline.
As mice age, a busy receptor-mediated protein transport across the barrier wanes; inhibiting an alkaline phosphatase restores it. Meanwhile, the aging barrier becomes generally leaky to large molecules.