In the United States, Racial Disparities in Dementia Risk Persist
Despite overall falling dementia rates in the U.S., black people remain more susceptible than whites.
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In Mice, Aducanumab Neutralizes Aβ Seeds
Could this forestall the amyloid cascade and the onset of Alzheimer’s disease?
Fatal Gift Wrap: Neurons Fall for Packaged Tau Oligomers
Neurons take up extracellular vesicles containing tau oligomers more readily than they do free tau. Some gift: This speeds the march of tauopathy through mouse brain.
Aβ Binds Glutamate Receptors. Only in Guys, Though.
In both mice and (wo)men, the sex difference comes down to an Aβ-glutamate receptor-prion protein troika.
Expression Analysis Uncovers Three Distinct Forms of Alzheimer’s
High amyloid burden and neuroinflammation, neuronal excitability, and tangles and oligodendrocyte loss distinguish the disease types.
Plasma P-Tau181 Predicts, Monitors Alzheimer’s Progression
The blood-based marker may be far more scalable and cost-effective for tracking the disease than PET imaging and CSF biomarkers.
Myeloid Metabolic Crisis May Trigger Cognitive Decline in Aging Brain
Aging macrophages and microglia poorly burn glucose and enter an inflammatory state. Revving their metabolism preserved synapses and memory in mice. What does prostaglandin have to do with it?
Selective Vulnerability News: RORB Neurons Are First Victims of Tangles
By tracing the transcriptomes of neurons that wither early and late in the course of Alzheimer’s disease, researchers peg subpopulations of excitatory neurons in entorhinal cortex as selectively vulnerable to tau. Reactive astrocytes aid and abet.
α-Synuclein Spurs Neuroinflammation Via Microglial LRRK2
The transcription factor NFATc2 mediates this response.
Epigenomic Roadmap Points to Causal Genes
By looking for SNPs that affect how transcription factors bind DNA, researchers nominated causal genes for 30 Alzheimer’s and Parkinson’s GWAS hits.
Does Parkin Substrate Kick-Start Lewy Bodies?
Amyloids of AIMP2 found in Parkinson’s disease may seed α-synuclein aggregation.
Individualized Tau PET Model Outperforms Predictive Power of Braak Staging
By pinpointing where tau pathology starts in a person’s brain, researchers better predicted future spread and determined small changes in tangle load.
Biomarkers of Errant Endosome Spotted in Cerebrospinal Fluid
In mice, forebrain neurons with hobbled retromers ooze fragments of tau and several BACE1 substrates into the CSF. Similar proteins are up in CSF from people with MCI and Alzheimer’s disease.
Huntingtin Repeats Cause—FTD, Caveolin Variants—ALS?
Breaking familiar gene-disease patterns, HTT trinucleotide expansions lead to huntingtin aggregates in prefrontal cortex. Noncoding caveolin 1 variants suppress its expression.
Not Just a Biomarker: YKL-40 Links Glial Clock to Amyloidosis
This astrocytic glycoprotein greases glial phagocytosis and reduces plaque burden in mice. The circadian clock protein Bmal1 suppresses it.
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