Ontogeny of ependymoglial cells lining the third ventricle in mice

IntroductionDuring hypothalamic development, the germinative neuroepithelium gives birth to diverse neural cells that regulate numerous physiological functions in adulthood. MethodsHere, we studied the ontogeny of ependymal cells in the mouse mediobasal hypothalamus using the BrdU approach and publicly available single-cell RNAseq datasets. ResultsWe observed that while typical ependymal cells are mainly produced at E13, tanycyte birth depends on time and subtypes and lasts up to P8. Typical ependymocytes and beta tanycytes are the first to arise at the top and bottom of the dorsoventral axis around E13, whereas alpha tanycytes emerge later in development, generating an outside-in dorsoventral gradient along the third ventricle. Additionally, alpha tanycyte generation displayed a rostral-to-caudal pattern. Finally, tanycytes mature progressively until they reach transcriptional maturity between P4 and P14. DiscussionAltogether, this data shows that ependyma generation differs in time and distribution, highlighting the heterogeneity of the third ventricle.

Automated summary

In this study, the development of ependymal cells in the mouse mediobasal hypothalamus was examined using the BrdU approach and publicly available single-cell RNAseq datasets. The results showed that typical ependymal cells are mainly generated at E13, while the generation of tanycytes depends on time and subtypes and lasts until P8. The study also revealed a dorsoventral and rostral-to-caudal pattern in the generation of ependymal cells along the third ventricle.