Age-appropriate regulation of cerebrospinal fluid (CSF) dynamics including production, flow, and clearance (e.g. via glymphatics and dural lymphatics) is essential for brain health. The choroid plexus (ChP) is an important compartment in CSF dynamics but its contribution is poorly understood. To identify temporally regulated ChP epithelial cell functions that may relate to increased ATP demand, we investigated transcripts that are prioritized for translation, therefore reflecting the functional preference of the ChP tissue. We employed Translating Ribosomal Affinity Purification.  We identified ChP Na-K-Cl co-transporter [NKCC1] as developmentally regulated, in both expression and function, by mechanisms ranging from epigenetic (NuRD) to post-translational, coupled with increased ATP production. Premature NKCC1 overexpression in ChP accelerated CSF [K+] reduction, reduced ventricle size, and increased intracranial compliance by adulthood as measured by a murine intracranial pressu  re monitor paired serially with MRI. Our data point to a critical developmental period when ChP transiently absorbs CSF through NKCC1-mediated K+ transport, which bears implications on lifelong brain fluid homeostasis and health. SOURCE: Maria Lehtinen Boston Children's Hospital

Pluto Bioinformatics

GSE138970: Analysis of differential gene expression in the choroid plexus (ChP) of E16.5 and P60 mice