Transient synaptic silencing of developing striate cortex has persistent effects on visual function and plasticity. (Articolo in rivista)

Type
Label
  • Transient synaptic silencing of developing striate cortex has persistent effects on visual function and plasticity. (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1523/JNEUROSCI.0772-07.2007 (literal)
Alternative label
  • Caleo M, Restani L, Gianfranceschi L, Costantin L, Rossi C, Rossetto O, Montecucco C, Maffei L. (2007)
    Transient synaptic silencing of developing striate cortex has persistent effects on visual function and plasticity.
    in The Journal of neuroscience
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Caleo M, Restani L, Gianfranceschi L, Costantin L, Rossi C, Rossetto O, Montecucco C, Maffei L. (literal)
Pagina inizio
  • 4530 (literal)
Pagina fine
  • 4540 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 27 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR Neuroscience Institute (literal)
Titolo
  • Transient synaptic silencing of developing striate cortex has persistent effects on visual function and plasticity. (literal)
Abstract
  • Neural circuits in the cerebral cortex are shaped by experience during \"critical periods\" early in life. For example, visual cortex is immature at the time of eye opening and gradually develops its functional properties during a sensitive period. Very few reports have addressed the role of intrinsic neural activity in cortical maturation. Here we have exploited the bacterial enzyme botulinum neurotoxin E (BoNT/ E) to produce a unilateral, reversible blockade of neural activity in rat visual cortex during the sensitive period. BoNT/E is a highly selective protease that interferes with transmitter release via cleavage of the synaptic protein SNAP-25 (synaptosomal-associated protein of 25 kDa). Unilateral, intracortical injections of BoNT/E were made at the time of eye opening and resulted in the silencing of the treated, but not contralateral, hemisphere for a period of 2 weeks. We found that visual acuity was permanently reduced in the blocked hemisphere, and the critical period for ocular dominance plasticity persisted into adulthood. Unexpectedly, these effects extended equally to the contralateral, uninjected side, demonstrating a fundamental role for interhemispheric connections in cortical maturation. (literal)
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