In mouse models of Alzheimer’s, neutrophils stick to capillaries in the cerebral cortex, reducing blood flow. Keeping those cells moving or depleting them altogether improved memory.
A score based on the combined burden of a person’s Alzheimer’s risk variants correlated with plaques, tangles, cognitive decline, and even non-AD pathology. Are polygenic hazard scores ready for direct-to-consumer marketing?
How the element relates to neurodegeneration remains unclear.
IBM researchers in Australia identify a combination of four proteins in plasma that predicts amyloid positivity in cerebrospinal fluid, and correlates with progression to AD.
Analysis of 19 H1 MAPT subhaplotypes ties five to progressive supranuclear palsy.
Women who started menstruation after the age of 16, and/or entered menopause before 47, had higher rates of dementia later in life.
Flortaucipir in former NFL players cropped up in regions known to be affected by chronic traumatic encephalopathy, but uptake was low compared with AD. Whether this reflects low tau deposition or poor tracer binding remain to be seen.
The Phase 3 trial ended early when prodromal AD patients on the BACE1 inhibitor declined faster than those on placebo.
In ADNI, blood marker exposes ongoing neurodegeneration across disease stages.
Long recognized in dendrites, scientists now report that substantial synaptic proteome remodeling happens on the axonal side, too.
A PLCG2 variant that reduces a person’s risk of Alzheimer’s, frontotemporal dementia, and dementia with Lewy bodies also appears to extend longevity.
Exposing AD mice to multisensory gamma therapy induced 40-Hz waves in their brains, plus effects on amyloid, tau, microglia, blood vessels, and cognitive function.
Amyloid plaques in postmortem human cortex correlated with the proportion of microglia that were activated, not with microglial numbers. Tau pathology and cognitive decline come later.
Serial amyloid and tau scans in cognitively healthy people indicate that the speed at which a person’s tau accumulates best predicts his or her future cognitive decline.
Aβ deposits make distal neurons vulnerable to insults, including from local Aβ, says imaging study. The combination hastens cognitive decline.