The subcommissural organ regulates brain development via secreted peptides
- PMID: 38741020
- DOI: 10.1038/s41593-024-01639-x
The subcommissural organ regulates brain development via secreted peptides
Abstract
The subcommissural organ (SCO) is a gland located at the entrance of the aqueduct of Sylvius in the brain. It exists in species as distantly related as amphioxus and humans, but its function is largely unknown. Here, to explore its function, we compared transcriptomes of SCO and non-SCO brain regions and found three genes, Sspo, Car3 and Spdef, that are highly expressed in the SCO. Mouse strains expressing Cre recombinase from endogenous promoter/enhancer elements of these genes were used to genetically ablate SCO cells during embryonic development, resulting in severe hydrocephalus and defects in neuronal migration and development of neuronal axons and dendrites. Unbiased peptidomic analysis revealed enrichment of three SCO-derived peptides, namely, thymosin beta 4, thymosin beta 10 and NP24, and their reintroduction into SCO-ablated brain ventricles substantially rescued developmental defects. Together, these data identify a critical role for the SCO in brain development.
© 2024. The Author(s), under exclusive licence to Springer Nature America, Inc.
Update of
-
The subcommissural organ regulates brain development via secreted peptides.bioRxiv [Preprint]. 2024 Mar 31:2024.03.30.587415. doi: 10.1101/2024.03.30.587415. bioRxiv. 2024. Update in: Nat Neurosci. 2024 Jun;27(6):1103-1115. doi: 10.1038/s41593-024-01639-x. PMID: 38585720 Free PMC article. Updated. Preprint.
References
-
- Peruzzo, B. et al. Ultrastructural immunocytochemistry and lectin histochemistry of the subcommissural organ in the snake Natrix maura with particular emphasis on its vascular and leptomeningeal projections. Histochemistry 93, 269–277 (1990). - PubMed
-
- Rodríguez, E. M., Oksche, A. & Montecinos, H. Human subcommissural organ, with particular emphasis on its secretory activity during the fetal life. Microsc. Res. Tech. 52, 573–590 (2001). - PubMed
-
- Ortloff, A. R. et al. Role of the subcommissural organ in the pathogenesis of congenital hydrocephalus in the HTx rat. Cell Tissue Res. 352, 707–725 (2013). - PubMed
MeSH terms
Substances
Grants and funding
LinkOut - more resources
Full Text Sources
Molecular Biology Databases
Miscellaneous
