Spatially Heterogeneous Choroid Plexus Transcriptomes Encode Positional Identity and Contribute to Regional CSF Production
- Lun, Melody P.
- Johnson, Matthew B.
- Broadbelt, Kevin G.
- Watanabe, Momoko
- Kang, Young-jin
- Chau, Kevin F.
- Springel, Mark W.
- Malesz, Alexandra
- Sousa, Andre M. M.
- Pletikos, Mihovil
- Adelita, Tai
- Calicchio, Monica L.
- Zhang, Yong
- Holtzman, Michael J.
- Lidov, Hart G. W.
- Sestan, Nenad
- Steen, Hanno
- Monuki, Edwin S.
- Lehtinen, Maria K.
DOIAbstract
A sheet of choroid plexus epithelial cells extends into each cerebral ventricle and secretes signaling factors into the CSF. To evaluate whether differences in the CSF proteome across ventricles arise, in part, from regional differences in choroid plexus gene expression, we defined the transcriptome of lateral ventricle (telencephalic) versus fourth ventricle (hindbrain) choroid plexus. We find that positional identities of mouse, macaque, and human choroid plexi derive from gene expression domains that parallel their axial tissues of origin. We then show that molecular heterogeneity between telencephalic and hindbrain choroid plexi contributes to region-specific, age-dependent protein secretion in vitro. Transcriptome analysis of FACS-puri...
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