Data from different next-generation tracers look similar. It shows spreading plaques kick off tangles by Braak region; memory starts slipping later.
Happy New Year, readers! Yes, 2019 has passed, but so much happened last year that capturing the essence took longer than usual. Our mega year-end story is now posted for your reading pleasure.
Plaque-busting antibodies reset the time course of amyloid accumulation, but so far provide only hints of a clinical benefit in mild AD. Good news: once gone, plaque stays gone for a while.
Using mass spectrometry to detect teensy amounts of phospho-tau species in plasma, researchers reported that p-tau-217 and p-tau-181 picked out people with Aβ pathology. Differences between groups appear to be huge. An MS-based test for plasma Aβ42 corresponded to brain amyloid, and is going in for regulatory approval.
An expanded set of CSF biomarkers exposed tight connections between p-tau, synaptic dysfunction, and neuroinflammation in people with brain amyloid.
Imaging studies suggest that ApoE4 carriers may be more susceptible to the effects of tangles, particularly if they are women.
The circular transcripts correlate with AD pathology and dementia severity, suggesting potential roles in pathogenesis or as biomarkers.
From more than 45,000 MRI scans, a typical pattern of brain aging emerges. Brains “age” faster in people who have a neurological disorder.
The pattern varied from person to person, depending on the site of injury, in contrast to the stereotyped distribution of tau tangles seen in Alzheimer’s disease.
Longitudinal ADNI data tie higher sTREM2 in CSF to slower cognitive decline, reinforcing the idea that TREM2 activity protects the brain from AD pathology.
Changes in the composition of the cerebrospinal fluid and synapses may reveal novel insights into AD pathology.
Protein levels track with cognitive function and can distinguish Alzheimer’s patients from controls.
What’s with all those head-to-head comparison studies of academic and commercial biomarker tests? Could we not just pick one that works, and be done?
A plasma assay for Alzheimer’s could radically speed up screening for clinical trials; alas, competing assays don’t measure the same thing.
At this year’s AAIC, no sooner had scientists reported that phospho-tau in the CSF might reflect early responses to amyloid, than they reported parallel data for phospho-tau in blood.