Developmental control of spike-timing-dependent plasticity by tonic GABAergic signaling in striatum.
Neuropharmacology
; 121: 261-277, 2017 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-28408325
ABSTRACT
Activity-dependent long-term potentiation (LTP) and depression (LTD) of synaptic strength underlie multiple forms of learning and memory. Spike-timing-dependent plasticity (STDP) has been described as a Hebbian synaptic learning rule that could account for experience-dependent changes in neural networks, but little is known about whether and how STDP evolves during development. We previously showed that GABAergic signaling governs STDP polarity and thus operates as a Hebbian/anti-Hebbian switch in the striatum. Although GABAergic networks are subject to important developmental maturation, it remains unclear whether STDP is developmentally shaped by GABAergic signaling. Here, we investigated whether STDP rules are developmentally regulated at corticostriatal synapses in the dorsolateral striatum. We found that striatal STDP displays unidirectional plasticity (Hebbian tLTD) in young rats (P7-10) whereas STDP is bidirectional and anti-Hebbian in juvenile (P20-25) and adult (P60-90) rats. We also provide evidence that the appearance of tonic (extrasynaptic) GABAergic signaling from the juvenile stage is a crucial factor in shaping STDP rules during development, establishing bidirectional anti-Hebbian STDP in the adult striatum. Thus, developmental maturation of GABAergic signaling tightly drives the polarity of striatal plasticity.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Potenciales de Acción
/
Transducción de Señal
/
Potenciación a Largo Plazo
/
Cuerpo Estriado
/
Depresión Sináptica a Largo Plazo
/
Neuronas GABAérgicas
Límite:
Animals
Idioma:
En
Revista:
Neuropharmacology
Año:
2017
Tipo del documento:
Article
País de afiliación:
Francia