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Overabundance of Angiotensin-2 in COVID-19, resulting from RAS overactivation, disrupts brain cell synaptic connections and impairs cognitive functions.

When cancer that starts in the body metastasizes to the brain, it is almost always lethal, in part because so few treatment options exist. Now a new study by Wistar scientists published in Nature Communications shows that a type of brain cell called astrocytes plays an important role in promoting brain metastasis by recruiting a specific subpopulation of immune cells.

The pandemic and its aftermath have raised anxiety to new levels. But the roots of anxiety-related conditions, including obsessive-compulsive spectrum disorder (OCSD), are still unclear.

Years or yesterday we make that promise to you. >> reporter: and american promise cap to. since 2015 they have identified nearly 1200 soldiers, sailors, airmen, and marines including u.s. army corporal luther story. what does that mean to you? >> it means that i get to welcome him back. >> judy wade never met her uncle luther, a true war hero. during one battle in korea, his army citations that he killed or wounded 100 enemy soldiers. the 18-year-old died protecting his unit, the bravest soldier they ever met was awarded the medal of honor. general omar bradley presented it to his father. but ...

Fresh insights into the spread of damaging proteins that build up in the brains of people with Alzheimer's disease could hold the key to stopping the condition progressing, a study says.