Curbing Fatty Acids Means No Parkinson’s—If You Are a Mouse
Reducing levels of monounsaturated fatty acids lowered α-synuclein toxicity and prevented movement symptoms in mice. Scientists say the data boost the α-synuclein tetramer hypothesis.
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Better than Crystal Clear? Cryo-EM Achieves Atomic Resolution
Armed with snazzy new hardware, scientists solve protein structures to a resolution of 1.22Å. Cryo-EM now rivals X-ray crystallography.
New Rodent Knock-Ins Carry Humanized Wild-Type APP
Three amino acid substitutions in the Aβ sequence accelerate BACE cleavage of APP and ramp up Aβ production in rats and mice. The mice can serve as better controls for mutant APP knock-ins already in use.
In APP Knock-In Mice, Spatial Mapping Circuitry Crumbles
Poor coordination among grid cells in the entorhinal cortex and place cells in the hippocampus compromises navigation. Grid cells fail first.
Biogen Asks FDA To Approve Aducanumab
New drug application is first for Alzheimer’s disease in the U.S. since 2003, and first based on amyloid hypothesis.
Seeing into the Human Synapse: New Tools Illuminate Alzheimer’s Hot Spot
New synaptic profiling and imaging techniques are enabling scientists to zero in on synaptic proteins, including phospho-tau, that make the difference between clinical Alzheimer’s and resilience.
Doubling Down on Sequencing Serves up More Alzheimer’s Genes
New genetic variants emerged by harmonizing whole-exome-sequencing data across continents, and by using imputation to plumb the depths of existing GWAS. One variant encodes a microglial phospholipid transporter.
New Assay, New Cohorts—Plasma p-Tau181 Looks Even Better
At AAT-ADPD, researchers report how they built on prior reports that a person’s blood level of p-tau181 tells if they have Alzheimer’s.
α-Synuclein Antibody Misses Primary, May Have Signal on Secondaries
The first topline Phase 2 results from an antibody targeting Parkinson’s pathology, Roche’s prasinezumab, were a mixed bag. Next steps are unclear.
Amyloid Clearance: Check. Cognitive Benefit: Um … Maybe.
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.
Umibecestat-Driven Cognitive Decline Is Reversible
Subtle memory deficits resolved after volunteers stopped taking the Novartis BACE inhibitor.
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