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Heterogeneity of neurons reprogrammed from spinal cord astrocytes by the proneural factors Ascl1 and Neurogenin2

Kempf, J., Knelles, K., Hersbach, B. A., Petrik, D., Riedemann, T., Bednarova, V., Janjic, A., Simon-Ebert, T., Enard, W., Smialowski, P., Götz, M. and Masserdotti, G. 2021. Heterogeneity of neurons reprogrammed from spinal cord astrocytes by the proneural factors Ascl1 and Neurogenin2. Cell Reports 36 (3) , 109409. 10.1016/j.celrep.2021.109409

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Abstract

Astrocytes are a viable source for generating new neurons via direct conversion. However, little is known about the neurogenic cascades triggered in astrocytes from different regions of the CNS. Here, we examine the transcriptome induced by the proneural factors Ascl1 and Neurog2 in spinal cord-derived astrocytes in vitro. Each factor initially elicits different neurogenic programs that later converge to a V2 interneuron-like state. Intriguingly, patch sequencing (patch-seq) shows no overall correlation between functional properties and the transcriptome of the heterogenous induced neurons, except for K-channels. For example, some neurons with fully mature electrophysiological properties still express astrocyte genes, thus calling for careful molecular and functional analysis. Comparing the transcriptomes of spinal cord- and cerebral-cortex-derived astrocytes reveals profound differences, including developmental patterning cues maintained in vitro. These relate to the distinct neuronal identity elicited by Ascl1 and Neurog2 reflecting their developmental functions in subtype specification of the respective CNS region.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Additional Information: Creative Commons Attribution – NonCommercial – NoDerivs (CC BY-NC-ND 4.0)
Publisher: Cell Press
ISSN: 2211-1247
Date of First Compliant Deposit: 23 December 2021
Date of Acceptance: 24 June 2021
Last Modified: 04 Jan 2022 10:45
URI: https://orca.cardiff.ac.uk/id/eprint/146297

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