Nadine Felizitas Binder, Mohamad El Amki, Chaim Glück, William Middleham, Anna Maria Reuss, Adrien Bertolo, Patrick Thurner, Thomas Deffieux, Chryso Lambride, Robert Epp, Hannah-Lea Handelsmann, Philipp Baumgartner, Cyrille Orset, Philipp Bethge, Zsolt Kulcsar, Adriano Aguzzi, Mickael Tanter, Franca Schmid, Denis Vivien, Matthias Tasso Wyss, Andreas Luft, Michael Weller, Bruno Weber, Susanne Wegener
Recanalization is the mainstay of ischemic stroke treatment. However, even with timely clot removal, many stroke patients recover poorly. Leptomeningeal collaterals (LMCs) are pial anastomotic vessels with yet-unknown functions. We applied laser speckle imaging, ultrafast ultrasound, and two-photon microscopy in a thrombin-based mouse model of stroke and fibrinolytic treatment to show that LMCs maintain cerebral autoregulation and allow for gradual reperfusion, resulting in small infarcts. In mice with poor LMCs, distal arterial segments collapse, and deleterious hyperemia causes hemorrhage and mortality after recanalization...
February 16, 2024: Neuron