ADAR1 Promotes NUPR1 A-to-I RNA Editing to Exacerbate Ischemic Brain Injury by Microglia Mediated Neuroinflammation.

Summary: When a stroke occurs, the brain suffers from a lack of oxygen, but the damage doesn't stop there. The brain's own immune cells, called microglia, often overreact, causing inflammation that kills even more neurons. Researchers have identified a specific protein, ADAR1, that acts as a "bad commander" during this process. In mouse models of stroke, high levels of ADAR1 forced microglia into an aggressive state by tampering with the genetic instructions (RNA editing) of another protein called NUPR1. When scientists blocked ADAR1, the "good" NUPR1 protein was restored, inflammation calmed down, and brain damage was significantly reduced. This suggests that targeting ADAR1 could be a promising new way to treat stroke patients.