In a mouse model of cortical multiple sclerosis, microglia and monocytes swooped in to gobble up synapses when dendritic calcium rose. Spines grew back once inflammation subsided.
People who carry the ApoE4 variant are more likely to succumb to the virus. In vitro, SARS-CoV-2 infects more ApoE4 than ApoE3 brain cells. Astrocytes were activated, neurons degenerated.
The first ultrasensitive plasma test for this old marker differentiates Alzheimer’s from healthy controls and non-AD dementias. It segregates people stepwise at phases of pathogenesis down to Braak stages 1 and 2 and below amyloid PET positivity.
Researchers unearthed 75 risk loci, 42 of them new, and nominated candidate genes for each. A polygenic risk score based on all variants predicted AD risk with high accuracy.
Plaque-ridden 5xFAD mice were no better at fending off an intracerebral herpes virus infection than their wild-type counterparts. The virus was not to be found within Aβ plaques and did not spur plaques to form.
In mouse brain slices at least, tau shuffles in and out of protein inclusions. The tangles grew more inert as the tissue aged.
When cultured with human neurons expressing a familial Alzheimer’s gene, both microglia and astrocytes were necessary to spike complement C3 and send inflammation into overdrive.
By comparing protein changes with GWAS data, scientists identified new links to AD. This method can unearth genes that otherwise fall short of genome-wide significance.
In mouse models of Aβ toxicity and amyloidosis, inhibiting the integrated stress response restored protein production, spared synapses, and brought back memory.
Plaques abound, cytokines spike, microglia swell with lipids and send out spermine SOS signals in Denali model. Mice will be shared, allowing unrestricted use.
Some people with severe COVID-19 have neurovascular injury and elevated markers of neural damage in their blood and CSF. What’s going on in their brains?
In response to an FDA request, the drug’s sponsor submitted new data analyses. The agency moved the action date to June 7.
Sensor algorithms can accurately capture patterns of resting tremor and dyskinesia. This could help clinicians manage symptoms and medication.
People who report not participating in social or cognitive activities are more likely to develop dementia within the next few years, but not after that. The findings cast nonparticipation as a consequence, not a cause, of neurodegeneration.
Transcriptomic and epigenomic data pin PD risk genes in GWAS loci; six affect splicing, five expression, four are new.