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Falkner, S.* ; Grade, S. ; Dimou, L. ; Conzelmann, K.-H.* ; Bonhoeffner, T.* ; Götz, M. ; Hübener, M.*

Transplanted embryonic neurons integrate into adult neocortical circuits.

Nature 539, 248-253 (2016)
Publ. Version/Full Text Postprint Research data DOI
Open Access Green
The ability of the adult mammalian brain to compensate for neuronal loss caused by injury or disease is very limited. Transplantation aims to replace lost neurons, but the extent to which new neurons can integrate into existing circuits is unknown. Here, using chronic in vivo two-photon imaging, we show that embryonic neurons transplanted into the visual cortex of adult mice mature into bona fide pyramidal cells with selective pruning of basal dendrites, achieving adult-like densities of dendritic spines and axonal boutons within 4–8 weeks. Monosynaptic tracing experiments reveal that grafted neurons receive area-specific, afferent inputs matching those of pyramidal neurons in the normal visual cortex, including topographically organized geniculo-cortical connections. Furthermore, stimulus-selective responses refine over the course of many weeks and finally become indistinguishable from those of host neurons. Thus, grafted neurons can integrate with great specificity into neocortical circuits that normally never incorporate new neurons in the adult brain.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Neural circuits; Regeneration and repair in the nervous system
ISSN (print) / ISBN 0028-0836
e-ISSN 1476-4687
Journal Nature
Quellenangaben Volume: 539, Issue: , Pages: 248-253 Article Number: , Supplement: ,
Publisher Nature Publishing Group
Publishing Place London
Reviewing status Peer reviewed