CPTX—A Synaptic “Glue” Restores Memory in Alzheimer’s Model
The designer chimera stabilizes synapses in various mouse models of neurodegenerative disease.
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Of Four Aβ Antibodies, Only Aducanumab Stems Tide of Toxic Oligomers
While one anti-Aβ antibody thwarts initial seeding of fibrils, and others keep fibrils from lengthening, aducanumab prevents oligomers forming on their surface. In vitro, that is.
First Primate Model of Familial AD: Marmosets with Presenilin Mutation
Three young monkeys missing exon 9 of presenilin 1 seem to have an elevated Aβ42/40 ratio. It remains to be seen if they will develop plaques and tangles as they age.
VCP Coding Mutation Causes a Tauopathy With Vacuoles
Carriers of a rare hypomorphic gene variant develop a frontotemporal dementia that features Alzheimer’s-like neurofibrillary tangles.
NIA Weighs in on Neurodegenerative Disease Transmissibility
Expert panel concludes there’s little risk based on current evidence.
New ACE Variant Speeds Neurodegeneration in Alzheimer’s Mice
The R1279Q variant of angiotensin-converting enzyme associates with AD and causes neurodegeneration in mice. In a model of amyloidosis, it accelerates decline.
Excitotoxicity: Could a New Class of Drug Stop a Bad TRP?
TRP cation channels combine with extrasynaptic NMDA glutamate receptors to set off mitochondrial meltdown and cell death. Blocking the interaction stops excitotoxicity.
Single-nucleus RNA Sequencing Misses Activation of Human Microglia
Technical limitations may have misrepresented the transcriptional state of these cells, obscuring detection of their activation signature in frozen postmortem tissue from Alzheimer’s brain.
No Skin Off Your Nose: New Way to Diagnosing Parkinson’s?
Two papers report that skin samples from people with Parkinson’s disease contain α-synuclein seeds that can be robustly amplified, paving the way for a reliable test for the disease.
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.
Micro Nudge? Positive Phase 2 Results for ALS Combination Drug
AMX0035, a mix of sodium phenylbutyrate and taurursodiol, slowed functional decline over six months by about as much as the approved ALS drug edaravone.
Largest Alzheimer GWAS in African Americans Finds New Variants
Most pathways that emerged were common between African Americans and non-Hispanic whites, though some individual variants differed. Kidney development jumped out as a possibly unique aspect of AD in African Americans.
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.
Blunt Instruments: α-Synuclein Antibodies Poorly Distinguish Forms
A survey of 16 purported conformation-specific antibodies found that most bound nearly equally well to oligomers and fibrils, and weakly to monomers.
Do Endothelial Cells Spur Capillaries to Grow in Alzheimer’s Brain?
A new single-nucleus RNA-Seq study of 3,900 endothelial cells finds a boost in angiogenesis and antigen presentation genes, drawing attention to the vascular component of AD.
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