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Open Access Green as soon as Postprint is submitted to ZB.
Transplanted embryonic neurons integrate into adult neocortical circuits.
Nature 539, 248-253 (2016)
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; Mouse Visual-cortex; Cortical-neurons; Stem-cells; Pyramidal Neurons; Receptive-fields; In-vivo; Experience; Brain; Reconstruction; Degeneration
ISSN (print) / ISBN
0028-0836
e-ISSN
1476-4687
Journal
Nature
Quellenangaben
Volume: 539,
Issue: 7628,
Pages: 248-253
Publisher
Nature Publishing Group
Publishing Place
London
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Stem Cell Research (ISF)