Regulated expression of the neuronal calcium sensor-1 gene during long-term potentiation in the dentate gyrus in vivo.
Neuronal calcium sensor-1 (NCS-1), the mammalian homologue of frequenin, is a member of a highly conserved family of neuron-specific calcium-binding proteins which has been implicated in exocytosis and in multiple calcium-signalling pathways, suggesting a potential involvement in mechanisms of neuronal plasticity. Here, using in situ hybridization, we report an increased induction of the mRNA encoding NCS-1 in dentate granule cells following the induction of long-term potentiation in the awake rat. We show that NCS-1 mRNA levels are increased 1 and 3 h after long-term potentiation in an N-methyl-D-aspartate receptor-dependent manner, returning to baseline expression levels by 6 h. Electroconvulsive stimulation also induced NCS-1 mRNA transcription in the dentate gyrus, but at the different time of 6 h post-seizure, returning to baseline by 12 h.These results show that regulated expression of the NCS-1 gene is part of the transcriptional response associated with activity-dependent neuronal plasticity in vivo and suggest a molecular mechanism capable of mediating a functional change in synapse sensitivity to calcium and calcium-signalling pathways after long-term potentiation.[1]References
- Regulated expression of the neuronal calcium sensor-1 gene during long-term potentiation in the dentate gyrus in vivo. Génin, A., Davis, S., Meziane, H., Doyère, V., Jeromin, A., Roder, J., Mallet, J., Laroche, S. Neuroscience (2001) [Pubmed]
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