Activity-dependent clearance of cerebrospinal fluid in the aging brain
The choroid plexus is a sheet of epithelial cells located in each of the brain's ventricles and is a major source of cerebrospinal fluid (CSF). Recent work shows that choroid plexus epithelial cells (CPECs) secrete age-dependent signals into the CSF that regulate neural stem cell proliferation, identity and overall brain health. However, much less is known about the CPECs capacity to take up and clear CSF-resident toxins such as β-amyloid (Aβ). The proposed study will investigate whether CPECs can be activated to promote clearance of the brain CSF, and if this activity-dependent clearance is impaired in the aging brain.