Nature, Feb 2026·Monaghan KL, Zanluqui NG, et al.
Highly dynamic dural sinuses support meningeal immunity
Latest Nature publication from NIH NINDS collaborators, establishing dural sinuses as dynamic regulators of meningeal immunity.
NIH NINDS investigators used intravital microscopy and multi-modal cranial mapping to show that dural sinuses are highly dynamic venous structures, not passive blood drains, that restructure to regulate blood flow, fluid movement, and immune surveillance at the neuroimmune interface.
Key findings
- Dural sinuses undergo RAMP1-dependent constriction and dilation mediated by smooth muscle, resembling arterial behaviour.
- The superior sagittal sinus in mice is bifurcated into upper and lower chambers that contribute to intracranial pressure regulation.
- Specialized fenestrated sinus endothelial cells dynamically regulate intercellular boundaries (RAMP2-dependent) to safeguard fluid exchange and immune cell trafficking during homeostasis and viral infection.
Imaging Suite role: The Imaging Suite mapped cranial vasculature and integrated multi-modal 3D data, supporting analysis of dural sinus architecture and its role in fluid exchange, immune surveillance, and antiviral defence.