Sharp Centenarians Shrug Off Effects of Alzheimer’s Pathology
Despite plaques and tangles in the brain, this group, on average, maintains their cognitive skills over two to four years, suggesting the presence of resilience factors.
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New Data Question Anti-Microbial Powers of Aβ
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.
Does Calcium Overload Mark Dendritic Spines for Destruction?
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.
APOE Tied to Increased Susceptibility to SARS-CoV-2
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.
How Does COVID-19 Affect the Brain?
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?
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