Are the Long Aβ Peptides the Real Bad Guys?
Among 14 familial Alzheimer’s APP mutations, two don’t change the Aβ42/Aβ40 ratio, but all of them yield long peptides of 45 to 49 residues that hide out in the membrane.
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Among 14 familial Alzheimer’s APP mutations, two don’t change the Aβ42/Aβ40 ratio, but all of them yield long peptides of 45 to 49 residues that hide out in the membrane.
Assays will help doctors diagnose Alzheimer’s disease and amnestic mild cognitive impairment in Taiwanese clinics.
People who report not participating in social or cognitive activities are more likely to develop dementia within the next few years, but not after that. The findings cast nonparticipation as a consequence, not a cause, of neurodegeneration.
In mouse models of Aβ toxicity and amyloidosis, inhibiting the integrated stress response restored protein production, spared synapses, and brought back memory.
Sensor algorithms can accurately capture patterns of resting tremor and dyskinesia. This could help clinicians manage symptoms and medication.
In mouse brain slices at least, tau shuffles in and out of protein inclusions. The tangles grew more inert as the tissue aged.
When cultured with human neurons expressing a familial Alzheimer’s gene, both microglia and astrocytes were necessary to spike complement C3 and send inflammation into overdrive.
The first ultrasensitive plasma test for this old marker differentiates Alzheimer’s from healthy controls and non-AD dementias. It segregates people stepwise at phases of pathogenesis down to Braak stages 1 and 2 and below amyloid PET positivity.
Transcriptomic and epigenomic data pin PD risk genes in GWAS loci; six affect splicing, five expression, four are new.
Van Leeuwen was best known for finding frameshift mutations in APP and ubiquitin B in the brains of people with tauopathies.
In mice, an anti-ApoE antibody removed plaques from the brain’s parenchyma and blood vessels better than aducanumab. Importantly, it caused no microhemorrhages.
Researchers split $200,000 for their theories on the role of six microbes—one virus, four bacteria, and one parasite—in Alzheimer’s.
Epidemiology study reveals 1.5-times higher risk of dementia after herpes virus infection. Short-term antiviral treatment appears to lower risk.
The commercial test uses a few drops of saliva. It must be ordered by a physician. Plans are also in the works to use the test to select participants for clinical trials.
Based on pooled data from five well-characterized cohorts, women appear to initially outperform men, but then slide faster, on global cognition and executive function. Oddly, this was not true for memory.