BDNF signaling in correlation-dependent structural plasticity in the developing visual system.
Journal
PLoS biology
ISSN: 1545-7885
Titre abrégé: PLoS Biol
Pays: United States
ID NLM: 101183755
Informations de publication
Date de publication:
04 2023
04 2023
Historique:
received:
13
06
2022
accepted:
08
03
2023
revised:
13
04
2023
medline:
17
4
2023
pubmed:
4
4
2023
entrez:
3
4
2023
Statut:
epublish
Résumé
During development, patterned neural activity instructs topographic map refinement. Axons with similar patterns of neural activity converge onto target neurons and stabilize their synapses with these postsynaptic partners, restricting exploratory branch elaboration (Hebbian structural plasticity). On the other hand, non-correlated firing in inputs leads to synapse weakening and increased exploratory growth of axons (Stentian structural plasticity). We used visual stimulation to control the correlation structure of neural activity in a few ipsilaterally projecting (ipsi) retinal ganglion cell (RGC) axons with respect to the majority contralateral eye inputs in the optic tectum of albino Xenopus laevis tadpoles. Multiphoton live imaging of ipsi axons, combined with specific targeted disruptions of brain-derived neurotrophic factor (BDNF) signaling, revealed that both presynaptic p75NTR and TrkB are required for Stentian axonal branch addition, whereas presumptive postsynaptic BDNF signaling is necessary for Hebbian axon stabilization. Additionally, we found that BDNF signaling mediates local suppression of branch elimination in response to correlated firing of inputs. Daily in vivo imaging of contralateral RGC axons demonstrated that p75NTR knockdown reduces axon branch elongation and arbor spanning field volume.
Identifiants
pubmed: 37011100
doi: 10.1371/journal.pbio.3002070
pii: PBIOLOGY-D-22-01311
pmc: PMC10101647
doi:
Substances chimiques
Brain-Derived Neurotrophic Factor
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e3002070Subventions
Organisme : CIHR
ID : FDN-143238
Pays : Canada
Informations de copyright
Copyright: © 2023 Kutsarova et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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