Laura Bojarskaite, Sahar Nafari, Anne Katrine Ravnanger, Mina Martine Frey, Nadia Skauli, Knut Sindre Åbjørsbråten, Lena Catherine Roth, Mahmood Amiry-Moghaddam, Erlend A Nagelhus, Ole Petter Ottersen, Inger Lise Bogen, Anna E Thoren, Rune Enger
Waste from the brain has been shown to be cleared via the perivascular spaces through the so-called glymphatic system. According to this model the cerebrospinal fluid (CSF) enters the brain in perivascular spaces of arteries, crosses the astrocyte endfoot layer, flows through the parenchyma collecting waste that is subsequently drained along veins. Glymphatic clearance is dependent on astrocytic aquaporin-4 (AQP4) water channels that are highly enriched in the endfeet. Even though the polarized expression of AQP4 in endfeet is thought to be of crucial importance for glymphatic CSF influx, its role in extracellular solute clearance has only been evaluated using non-quantitative fluorescence measurements...
March 26, 2024: Fluids and Barriers of the CNS