Regulation of spine and synapse formation by activity-dependent intracellular signaling pathways
Open accessAbstract
Formation of the human brain during embryonic and postnatal development is an extraordinarily complex process resulting at maturity in billions of neurons with trillions of specialized connections called synapses. These synapses, composed of a varicosity or bouton from a presynaptic neuron that communicates with a dendritic spine of the postsynaptic neuron, comprise the neural network that is essential for complex behavioral phenomena and cognition. Inappropriate synapse formation or structure is thought to underlie several developmental neuropathologies. Even in the mature CNS, alterations in synapse structure and function continues to be a very dynamic process that is foundational to learning and memory as well as other adaptive abilities of the brain. This synaptic plasticity in mature neurons, which is often triggered by certain patterns of neural activity, is again multifaceted and involves post-translational modifications (e.g. phosphorylation) and subcellular relocalization or trafficking (endocytosis/exocytosis) of existing synaptic proteins, initiation of protein synthesis from existing mRNAs localized in dendrites or spines, and triggering of new gene transcription in the nucleus. These various cellular processes support varying temporal components of synaptic plasticity that begin within 1-2 min but can persist for hours to days. This review will give a critical assessment of activity-dependent molecular modulations of synapses reported over the past couple years. Owing to space limitations, it will focus on mammalian excitatory (i.e. glutamatergic) synapses and will not consider several activity-independent signaling pathways (e.g. ephrinB receptor) that also modulate spine and synapse formation.
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Downstream of CaMKII, Ras and Rho GTPases are important for regulating spine morphology and synaptic strength.
“Downstream of CaMKII, Ras and Rho GTPases are important for regulating spine morphology (Ramakers, 2002; Saneyoshi et al., 2010) and synaptic strength (Zhu et al., 2002; Patterson et al., 2010).”
From Barriers in the brain: resolving dendritic spine morphology and compartmentalization (2014) · cites this paper as Saneyoshi et al., 2010
In “Regulation of spine and synapse formation by small GTPases” (page not provided), the review links CaMKII to Rac-regulating proteins involved in spine maturation and formation, and identifies Rho-family GTPases as regulators of spine morphology. It discusses Ras in relation to AMPA-receptor trafficking, but does not establish Ras as downstream of CaMKII in regulating spine morphology. The citing sentence attaches Saneyoshi et al. to spine morphology, not synaptic strength. (LLM, conf=0.86)
Experimental — accuracy not yet measuredRho GTPases play important roles in regulating the actin cytoskeleton, which is essential for spine-specific, long-term structural and functional plasticity.
“Rho GTPases may constitute such signalling, because they play important roles in regulating actin cytoskeleton3,16, which is essential for spine-specific, long-term structural and functional plasticity14,17.”
From Local, persistent activation of Rho GTPases during plasticity of single dendritic spines (2011) · cites this paper as [3]
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“Wayman GA, Impey S, Marks D, Saneyoshi T, Grant WF, Derkach V, Soderling TR: Activity-dependent dendritic arborization mediated by CaM-kinase I activation and enhanced CREB-dependent transcription of Wnt-2.”
Self-citationKalirin-7 Controls Activity-Dependent Structural and Functional Plasticity of Dendritic Spines
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“The effects of external cues on spine morphology are mediated primarily by calcium-dependent signaling pathways (Cline, 2001; Saneyoshi et al., 2010), and we have recently demonstrated that calcium-dependent signaling pathways are vulnerable to modulation by polychlorinated biphenyls (PCBs) (Wayman…”
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“Downstream of CaMKII, Ras and Rho GTPases are important for regulating spine morphology (Ramakers, 2002; Saneyoshi et al., 2010) and synaptic strength (Zhu et al.”
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- Authors
- Saneyoshi, T., Fortin, D. A., & Soderling, T. R.
- Affiliations
- RIKEN Center for Brain Science (JP)
- Oregon Health & Science University (US)
- Corresponding author
- Soderling, Thomas R
- ORCID
- Saneyoshi, Takeo
- Venue
- Current Opinion in Neurobiology
- Publisher
- Elsevier BV
- Published
- 2010-02
- Volume
- 20
- Issue
- 1
- Pages
- 108-115
- ISSN
- 0959-4388 (ISSN-L)
- PMC
- PMC2856474
- OpenAlex
- W2019203795
- Cited by
- 133
- References
- 9
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 3 · 2020: 7 · 2019: 3 · 2018: 1 · 2017: 7 · 2016: 9 · 2015: 5 · 2014: 17 · 2013: 16 · 2012: 15
- FWCI
- 1.39
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Current Opinion in Neurobiology (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Tokyo Tech Research Repository (Tokyo Institute of Technology) (submittedVersion)
- Funders
- National Institute of General Medical Sciences (R01GM041292)
- National Institute of Neurological Disorders and Stroke (R01NS027037)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Keywords
- dendritic spine formation, synaptogenesis, activity-dependent signaling, synaptic plasticity, excitatory synapses, glutamatergic synapses, post-translational modification, protein trafficking, brain development
- MeSH terms
- Animals, Humans, Nerve Net, Synaptic Transmission, Neuronal Plasticity, Neurons, Synapses, Signal Transduction, Dendritic Spines
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