Satoshi Kamijo

Satoshi Kamijo
The University of Tokyo | Todai · Faculty & Graduate School of Medicine

Doctor of Philosophy

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16
Publications
2,490
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645
Citations

Publications

Publications (16)
Article
Increasing evidence has shown that voltage-gated L-type Ca²⁺ channels (LTCCs) are crucial for neurodevelopmental events, including neuronal differentiation/migration and neurite morphogenesis/extension. However, the time course of their functional maturation during the development of excitatory neurons remains unknown. Using a combination of fluore...
Article
Despite many association studies linking gene polymorphisms and mutations of L-type voltage-gated Ca²⁺ channels (VGCCs) in neurodevelopmental disorders such as autism and schizophrenia, the roles of specific L-type VGCC during brain development remain unclear. Calcium signaling has been shown to be essential for neurodevelopmental processes such as...
Article
Full-text available
Neuronal activity induces intracellular Ca(2+) increase, which triggers activation of a series of Ca(2+) -dependent signalling cascades. Among these, the multifunctional Ca(2+) / calmodulin-dependent protein kinases (CaMKs, or calmodulin kinases) play key roles in neuronal transmission, synaptic plasticity, circuit development and cognition. The mo...
Article
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Background: Wnt5a, originally identified as a guidance cue for commissural axons, activates a non-canonical pathway critical for cortical axonal morphogenesis. The molecular signaling cascade underlying this event remains obscure. Results: Through Ca(2+) imaging in acute embryonic cortical slices, we tested if radially migrating cortical excitat...
Article
Full-text available
Fluorescent Ca(2+) reporters are widely used as readouts of neuronal activities. Here we designed R-CaMP2, a high-affinity red genetically encoded calcium indicator (GECI) with a Hill coefficient near 1. Use of the calmodulin-binding sequence of CaMKK-α and CaMKK-β in lieu of an M13 sequence resulted in threefold faster rise and decay times of Ca(2...
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Article
CREB is a pivotal mediator of activity-regulated gene transcription that underlies memory formation and allocation. The contribution of a key CREB cofactor, CREB-regulated transcription coactivator 1 (CRTC1), has, however, remained elusive. Here we show that several constitutive kinase pathways and an activity-regulated phosphatase, calcineurin, co...
Article
Full-text available
Identifying the neuronal ensembles that respond to specific stimuli and mapping their projection patterns in living animals are fundamental challenges in neuroscience. To this end, we engineered a synthetic promoter, the enhanced synaptic activity-responsive element (E-SARE), that drives neuronal activity-dependent gene expression more potently tha...
Article
Ca(2+) -regulated reorganization of actin cytoskeleton is one of the key cell biological events that critically regulate neuronal morphogenesis during circuit formation, spinogenesis during synapse development, and activity-dependent structural plasticity at mature synapses. However, it remains unclear as to what extent the underlying Ca(2+) signal...
Article
Full-text available
Ca(2+) signaling plays important roles during both axonal and dendritic growth. Yet whether and how Ca(2+) rises may trigger and contribute to the development of long-range cortical connections remains mostly unknown. Here, we demonstrate that two separate limbs of the Ca(2+)/calmodulin-dependent protein kinase kinase (CaMKK)-CaMKI cascades, CaMKK-...

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