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Updated: Jul 31, 2026

Simultaneous Electrophysiological Recording and Calcium Imaging of Suprachiasmatic Nucleus Neurons
Published on: December 8, 2013
Nuclear calcium signaling controls CREB-mediated gene expression triggered by synaptic activity
G E Hardingham1, F J Arnold, H Bading
1MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, England.
Abstract:
Information storage in the nervous system requires transcription triggered by synaptically evoked calcium signals. It has been suggested that translocation of calmodulin into the nucleus, initiated by submembranous calcium transients, relays synaptic signals to CREB. Here we show that in hippocampal neurons, signaling to CREB can be activated by nuclear calcium alone and does not require import of cytoplasmic proteins into the nucleus. The nucleus is particularly suited to integrate neuronal firing patterns, and specifies the transcriptional outputs through a burst frequency-to-nuclear calcium amplitude conversion. Calcium release from intracellular stores promotes calcium wave propagation into the nucleus, which is critical for CREB-mediated transcription by synaptic NMDA receptors. Pharmacological or genetic modulation of nuclear calcium may directly affect transcription-dependent memory and cognitive functions.
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