The role of blood-cerebrospinal fluid barrier (BCB) dysfunction in Alzheimer’s disease (AD) has been addressed but not yet established. We evaluated the BCB integrity in 179 samples of cerebrospinal fluid (CSF) retrospectively collected from AD patients and control cases using both CSF/serum albumin ratio (QAlb) and CSF secretory Ca2+-dependent phospholipase A2 (sPLA2) activity. These analyses were supplemented with the measurement of total tau, amyloid-β1–42 (Aβ1–42), and ubiquitin CSF levels. We found that …
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