959-The Dynamic Architecture of Meningeal Immunity

Paper Talk · May 12, 2026 · 20m

This scientific study reveals that dural sinuses are not merely static drains for blood but are highly dynamic structures essential for brain immunity. Researchers discovered that in mice, the superior sagittal sinus is bifurcated into two chambers that actively contract and dilate to regulate intracranial pressure and fluid flow. These vessels are lined with specialized sinus endothelial cells (SECs) that utilize RAMP2 signaling to constantly restructure their boundaries. This shifting cellular surface, characterized by "ruffles" and "openings," facilitates the movement of immune cells and…