GO:0048170 positive regulation of long-term neuronal synaptic plasticity: Mechanisms, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0048170 describes any biological process that increases long-term neuronal synaptic plasticity, the ability of synapses to change persistently as circumstances require.
• Long-term synaptic plasticity generally involves lasting increases or decreases in actual synapse numbers, making it a structural as well as functional phenomenon.
• NMDA receptor signal amplification, activity-dependent epigenetic regulation of gene transcription, and cytoskeletal remodeling by proteins such as drebin are core mechanisms that positively regulate this process.
• Complement C3a, lactate-SIRT1 signaling, LARGE protein, and excitatory glycine receptors have all been experimentally shown to modulate long-term synaptic plasticity in vivo.
• Dysregulation of long-term synaptic plasticity is implicated in stroke recovery, anxiety-related behaviors, post-traumatic stress disorder, and cognitive impairment following neonatal anesthesia exposure.
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal testing of candidate genes in GO:0048170, supported by CRISPR library screening and bioinformatics services.
Description
GO:0048170, positive regulation of long-term neuronal synaptic plasticity, is a Gene Ontology biological process term that captures any mechanism which increases the capacity of neuronal synapses to undergo lasting change. Long-term neuronal synaptic plasticity is defined as the ability of synapses to change over extended timescales as circumstances require, and it generally involves either an increase or a decrease in the actual number of synapses. Positive regulation therefore encompasses molecular, cellular, and circuit-level events that enhance this persistent remodeling capacity rather than merely transient synaptic efficacy. Understanding GO:0048170 is important because long-term synaptic plasticity underlies learning, memory, recovery after injury, and adaptive behavioral responses, and its dysregulation is associated with neurological and psychiatric conditions. Researchers study this term to identify causal genes, signaling pathways, and therapeutic entry points that can strengthen or restore synaptic plasticity in disease models. The term is deliberately broad: it integrates glutamate receptor signaling, epigenetic transcriptional control, cytoskeletal dynamics, metabolic support, and extracellular matrix interactions, all of which converge on the long-term structural and functional remodeling of synapses.
positive regulation of long-term neuronal synaptic plasticity At A Glance
| GO ID | GO:0048170 |
|---|---|
| GO term | positive regulation of long-term neuronal synaptic plasticity |
| Ontology | biological_process |
| Synonym | activation of long-term neuronal synaptic plasticity; stimulation of long-term neuronal synaptic plasticity; up regulation of long-term neuronal synaptic plasticity; up-regulation of long-term neuronal synaptic plasticity; upregulation of long-term neuronal synaptic plasticity |
| Major function | Increases the ability of neuronal synapses to change persistently, often involving changes in synapse numbers |
| Related processes | Long-term potentiation, long-term depression, activity-dependent transcription, cytoskeletal remodeling |
| Key signaling examples | NMDA receptor signal amplification, complement C3a, lactate-SIRT1, LARGE protein, excitatory glycine receptors |
| Disease relevance | Stroke recovery, anxiety-related behaviors, PTSD, cognitive impairment after neonatal sevoflurane exposure |
What Is GO:0048170?
In plain terms, GO:0048170 is the set of processes that boost the long-lasting ability of neuronal synapses to change. The QuickGO definition states that it is a process that increases long-term neuronal synaptic plasticity, the ability of neuronal synapses to change long-term as circumstances require, and notes that long-term neuronal synaptic plasticity generally involves increase or decrease in actual synapse numbers. This means positive regulation can act by promoting synapse formation, stabilizing existing synapses, or enhancing the molecular machinery that supports persistent functional changes. It is a biological_process term, not a molecular function or cellular component term, and it sits downstream of many signaling and transcriptional events that ultimately modify synaptic structure and strength.
Why Is positive regulation of long-term neuronal synaptic plasticity Important in Cell Biology?
GO:0048170 matters because long-term synaptic plasticity is a cellular cornerstone of learning, memory, and adaptive behavior, and positive regulation of this process determines whether neural circuits can durably reorganize after experience or injury. Experimental evidence shows that enhancing long-term synaptic plasticity through complement C3a treatment accelerates recovery after stroke by modulating astrocyte reactivity and cortical connectivity, while lactate-SIRT1 signaling improves long-term cognitive impairment induced by repeated neonatal sevoflurane exposure through adult hippocampal neurogenesis and synaptic plasticity. Excitatory glycine receptors control ventral hippocampus synaptic plasticity and anxiety-related behaviors, and transcutaneous auricular vagus nerve stimulation alleviates anxiety-like behaviors in PTSD mice by regulating glutamatergic neurons in the anterior cingulate cortex. These findings position GO:0048170 as a translational hub for neurological and psychiatric disease research.
• Provides a mechanistic framework for learning and memory at the synapse level.
• Is directly linked to recovery after stroke through astrocyte reactivity and cortical connectivity.
• Modulates anxiety-related behaviors via ventral hippocampus excitatory glycine receptors.
• Contributes to PTSD-like behaviors through glutamatergic neurons in the anterior cingulate cortex.
• Is impaired in cognitive deficits following repeated neonatal sevoflurane exposure and can be rescued by lactate-SIRT1 signaling.
• Involves activity-induced homeostatic resetting driven by LARGE protein.
• Depends on activity-mediated epigenetic regulation of gene transcription.
• Requires cytoskeletal remodeling mediated by drebin and related proteins.
• Offers candidate targets for therapeutic modulation of synaptic plasticity in neurological disease.
• Can be dissected causally using CRISPR knockout, point-mutation, knock-in, and overexpression models.
What Happens During positive regulation of long-term neuronal synaptic plasticity?
Initiation by activity-dependent signaling
In simple terms: Neuronal activity triggers signals that start the process of making synapses change for the long term.
Positive regulation of long-term neuronal synaptic plasticity begins when patterns of neuronal activity engage receptor and signaling systems that mark a synapse for persistent change. Hippocampal long-term synaptic plasticity depends on signal amplification of NMDA receptors, which convert transient glutamate release into sustained intracellular signals. Excitatory glycine receptors in the ventral hippocampus also control synaptic plasticity and anxiety-related behaviors, showing that multiple excitatory receptor systems can initiate long-term plasticity programs. Activity-mediated epigenetic regulation of gene transcription further links initial activity to durable changes in gene expression.
Transcriptional and epigenetic consolidation
In simple terms: The cell switches genes on or off to lock in the long-term change.
Once initiated, positive regulation requires transcriptional and epigenetic consolidation. Activity-mediated epigenetic regulation shapes synaptic plasticity by controlling gene transcription in response to neuronal activity. This step converts short-lived signaling events into stable changes in the expression of genes that support synapse structure and function. The lactate-SIRT1 axis exemplifies how metabolic and epigenetic regulators converge on adult hippocampal neurogenesis and synaptic plasticity to improve long-term cognitive outcomes.
Cytoskeletal and structural remodeling
In simple terms: The internal skeleton of the synapse is rebuilt to support lasting structural change.
Long-term neuronal synaptic plasticity generally involves changes in actual synapse numbers, which requires remodeling of the actin cytoskeleton and associated scaffolding proteins. Drebrin, an actin-binding protein enriched in dendritic spines, plays a key role in synaptic plasticity by organizing the spine cytoskeleton. This structural remodeling provides the physical basis for persistent increases in synapse number or strength that define positive regulation of long-term plasticity.
Homeostatic resetting and network stabilization
In simple terms: The network adjusts itself so that changes remain stable and balanced.
Positive regulation of long-term synaptic plasticity also involves homeostatic mechanisms that stabilize circuit function. LARGE protein drives activity-induced homeostatic resetting, indicating that positive regulation can include processes that reset synaptic strength to maintain network stability while preserving long-term plasticity. Complement C3a treatment accelerates recovery after stroke via modulation of astrocyte reactivity and cortical connectivity, showing that non-neuronal cells contribute to stabilizing long-term plasticity in injured circuits.
Metabolic and glial support
In simple terms: Energy supply and support cells help synapses maintain long-term changes.
Metabolic and glial support are increasingly recognized as positive regulators of long-term synaptic plasticity. Lactate improves long-term cognitive impairment induced by repeated neonatal sevoflurane exposures through SIRT1-mediated regulation of adult hippocampal neurogenesis and synaptic plasticity in male mice. Astrocyte reactivity modulated by complement C3a influences cortical connectivity and recovery after stroke, linking glial responses to long-term synaptic reorganization. These findings show that positive regulation of GO:0048170 is not neuron-autonomous but depends on metabolic and glial interactions.
Key Genes Involved in GO:0048170 positive regulation of long-term neuronal synaptic plasticity
The following genes and proteins have been experimentally implicated in processes that positively regulate long-term neuronal synaptic plasticity, based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| GRIN1/GRIN2A/GRIN2B (NMDA receptor subunits) | Mediate NMDA receptor signal amplification required for hippocampal long-term synaptic plasticity | Core targets for studying initiation of long-term plasticity |
| C3 | Complement C3a treatment modulates astrocyte reactivity and cortical connectivity to accelerate stroke recovery | Links complement signaling to long-term synaptic reorganization after injury |
| GLRA/GLRB (glycine receptor subunits) | Excitatory glycine receptors control ventral hippocampus synaptic plasticity and anxiety-related behaviors | Implicated in anxiety-related plasticity mechanisms |
| DBN1 (Drebrin) | Actin-binding protein that organizes dendritic spine cytoskeleton during synaptic plasticity | Structural regulator of long-term spine remodeling |
| LARGE1 | Drives activity-induced homeostatic resetting | Connects homeostatic plasticity to long-term synaptic stability |
| SIRT1 | Mediates lactate effects on adult hippocampal neurogenesis and synaptic plasticity | Metabolic-epigenetic regulator of long-term cognitive outcomes |
| SLC16A1/SLC16A3 (MCTs) | Support lactate transport underlying SIRT1-mediated synaptic plasticity | Metabolic support of long-term plasticity |
| BDNF | Activity-dependent neurotrophin supporting long-term synaptic plasticity | Classic target for transcriptional regulation of plasticity |
| CREB1 | Activity-dependent transcription factor linking neuronal activity to gene expression | Central node in epigenetic regulation of plasticity |
| ARC | Activity-regulated cytoskeletal protein involved in synaptic remodeling | Marker and effector of long-term plasticity |
| CAMK2A | Calcium/calmodulin-dependent kinase mediating NMDA receptor signaling | Kinase effector downstream of NMDA receptors |
| GRIA1/GRIA2 (AMPA receptor subunits) | Mediate fast excitatory transmission underlying synaptic strengthening | Targets for studying synaptic efficacy changes |
| HOMER1 | Scaffolding protein at excitatory synapses | Modulates receptor signaling complexes in plasticity |
| DLG4 (PSD-95) | Postsynaptic density scaffold organizing receptor signaling | Structural hub of excitatory synapses |
| GABRA/GABRB (GABA-A receptor subunits) | Inhibitory receptor subunits influencing excitation-inhibition balance | Relevant to plasticity in anxiety and PTSD models |
| SLC1A2 (GLT-1) | Astrocytic glutamate transporter influencing glutamatergic transmission | Glial regulator of synaptic plasticity |
| SLC6A4 (SERT) | Serotonin transporter modulating monoaminergic tone | Indirect modulator of plasticity-related behaviors |
| GRM1/GRM5 (metabotropic glutamate receptors) | Modulate glutamatergic signaling and plasticity | Targets in anterior cingulate cortex plasticity studies |
How Is positive regulation of long-term neuronal synaptic plasticity Regulated?
Positive regulation of long-term neuronal synaptic plasticity is itself regulated at multiple levels. Activity-mediated epigenetic regulation of gene transcription provides a feedback mechanism by which neuronal activity controls the expression of plasticity-related genes. NMDA receptor signal amplification acts as a gain control that determines whether a synapse enters a long-term plastic state. Metabolic regulation through the lactate-SIRT1 axis links energy availability to adult hippocampal neurogenesis and synaptic plasticity. Homeostatic resetting driven by LARGE protein provides negative feedback that prevents runaway plasticity while preserving long-term stability. Glial regulation via complement C3a and astrocyte reactivity further modulates cortical connectivity and recovery after stroke. Together, these layers ensure that positive regulation of GO:0048170 is tightly controlled in time and space.
positive regulation of long-term neuronal synaptic plasticity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| C3 | Stroke recovery via astrocyte reactivity and cortical connectivity | Mouse stroke model with C3a treatment and connectivity assays |
| GLRA/GLRB | Anxiety-related behaviors and ventral hippocampus plasticity | Knockout or point-mutation mice with anxiety behavioral tests |
| SIRT1 | Cognitive impairment after neonatal sevoflurane exposure | Neonatal sevoflurane mouse model with SIRT1 manipulation |
| LARGE1 | Activity-induced homeostatic resetting and network stability | Knockout or overexpression models with activity paradigms |
| GRIN1/GRIN2A/GRIN2B | Hippocampal long-term synaptic plasticity | Electrophysiology in knockout or point-mutation mice |
Stroke and recovery of cortical connectivity
Complement C3a treatment accelerates recovery after stroke via modulation of astrocyte reactivity and cortical connectivity, demonstrating that positive regulation of long-term neuronal synaptic plasticity is a therapeutic target for post-stroke rehabilitation. The involvement of astrocytes indicates that glial modulation can enhance long-term synaptic reorganization in injured cortex.
Anxiety-related behaviors and PTSD
Excitatory glycine receptors control ventral hippocampus synaptic plasticity and anxiety-related behaviors, linking GO:0048170 to emotional regulation. Transcutaneous auricular vagus nerve stimulation alleviates anxiety-like behaviors in mice with post-traumatic stress disorder by regulating glutamatergic neurons in the anterior cingulate cortex, further connecting long-term synaptic plasticity to PTSD-like phenotypes.
Cognitive impairment after neonatal anesthesia exposure
Lactate improves long-term cognitive impairment induced by repeated neonatal sevoflurane exposures through SIRT1-mediated regulation of adult hippocampal neurogenesis and synaptic plasticity in male mice. This identifies the lactate-SIRT1 axis as a modulator of GO:0048170 with potential relevance to anesthesia-induced neurodevelopmental deficits.
Homeostatic dysregulation and network instability
LARGE protein drives activity-induced homeostatic resetting, and disruption of such homeostatic mechanisms may contribute to network instability. Because long-term neuronal synaptic plasticity generally involves changes in synapse numbers, failure of homeostatic resetting could lead to maladaptive plasticity in neurological disorders.
From positive regulation of long-term neuronal synaptic plasticity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for long-term synaptic plasticity? | CRISPR knockout in primary neurons or mouse hippocampus |
| Does a specific point mutation alter NMDA receptor signal amplification? | CRISPR point-mutation knock-in in GRIN subunit genes |
| Does tagging a plasticity protein affect its localization? | CRISPR tagged knock-in with fluorescent or epitope tag |
| Does overexpression of a candidate gene enhance long-term plasticity? | CRISPR overexpression or transgenic overexpression model |
| Which genes regulate anxiety-related synaptic plasticity? | Knockout or point-mutation models with behavioral and electrophysiological readouts |
| How does metabolic signaling modulate long-term plasticity? | Knock-in or knockout of SIRT1 pathway components with metabolic challenge |
How to Study the positive regulation of long-term neuronal synaptic plasticity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Electrophysiology (LTP/LTD) | Long-term changes in synaptic efficacy | Testing positive regulation in hippocampal slices |
| RNA sequencing | Activity-dependent gene expression programs | Identifying transcriptional regulators of plasticity |
| Chromatin accessibility assays | Epigenetic regulation of gene transcription | Mapping activity-mediated epigenetic changes |
| Spine imaging | Changes in synapse number and structure | Assessing structural long-term plasticity |
| Drebrin immunostaining | Cytoskeletal remodeling in dendritic spines | Evaluating actin-based plasticity mechanisms |
| Behavioral testing | Anxiety, PTSD-like, and cognitive phenotypes | Linking plasticity to behavior |
| Metabolic assays | Lactate and SIRT1 pathway activity | Testing metabolic modulation of plasticity |
| Homeostatic plasticity assays | Activity-induced resetting | Studying network stabilization mechanisms |
Electrophysiology for long-term plasticity
Long-term potentiation and long-term depression recordings in hippocampal slices are standard methods to measure long-term neuronal synaptic plasticity. These assays can be combined with pharmacological or genetic manipulation of NMDA receptor signaling to test positive regulation.
Transcriptional and epigenetic profiling
RNA sequencing and chromatin accessibility assays can reveal activity-mediated epigenetic regulation of gene transcription underlying long-term plasticity. Such approaches identify gene expression programs that consolidate transient activity into durable synaptic changes.
Imaging of synapse number and structure
Because long-term neuronal synaptic plasticity generally involves changes in actual synapse numbers, imaging of dendritic spines and synapse markers is essential. Drebrin immunostaining and live imaging of spine dynamics provide readouts of cytoskeletal remodeling during plasticity.
Behavioral and circuit-level assays
Anxiety-related behaviors, PTSD-like phenotypes, and cognitive outcomes can be assessed in mice after genetic or pharmacological manipulation of plasticity regulators. Combining behavior with circuit-level manipulation, such as vagus nerve stimulation, links molecular plasticity to organismal function.
How CRISPR Can Be Used to Study GO:0048170 positive regulation of long-term neuronal synaptic plasticity
Knockout
CRISPR knockout of candidate genes such as GRIN subunits, DBN1, or SIRT1 can test whether they are required for positive regulation of long-term neuronal synaptic plasticity. Knockout models are typically validated by electrophysiology and spine imaging to detect loss of long-term plasticity.
Point Mutation
CRISPR point-mutation knock-in can introduce specific amino acid changes in receptors or signaling proteins to dissect domain-specific functions in long-term plasticity. For example, mutations affecting NMDA receptor signal amplification can be modeled to test their impact on hippocampal long-term synaptic plasticity.
Knock-in
Tagged knock-in of plasticity-related proteins enables visualization of their localization and dynamics during long-term synaptic remodeling. Knock-in of reporter or epitope tags in genes such as DBN1 or ARC supports imaging of cytoskeletal and activity-dependent changes.
Overexpression
CRISPR overexpression or transgenic overexpression of positive regulators such as C3a pathway components, SIRT1, or LARGE1 can test sufficiency for enhancing long-term synaptic plasticity. Overexpression models are useful for identifying therapeutic candidates that boost plasticity in disease contexts.
How EDITGENE Supports positive regulation of long-term neuronal synaptic plasticity Research
Researchers studying positive regulation of long-term neuronal synaptic plasticity-related genes often need to determine whether a candidate gene is causally involved in long-term synaptic change or merely correlated with it. CRISPR-based knockout, point-mutation, knock-in, and overexpression models provide the causal evidence required for publication-grade conclusions, while CRISPR library screening and bioinformatics can nominate new regulators of GO:0048170 for functional validation.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of long-term neuronal synaptic plasticity research.
Frequently Asked Questions About positive regulation of long-term neuronal synaptic plasticity
What is GO:0048170 positive regulation of long-term neuronal synaptic plasticity?
GO:0048170 is a Gene Ontology biological process term describing any process that increases long-term neuronal synaptic plasticity, the ability of neuronal synapses to change long-term as circumstances require, generally involving changes in actual synapse numbers.
What genes are involved in positive regulation of long-term neuronal synaptic plasticity?
Genes and proteins experimentally implicated include NMDA receptor subunits, complement C3, excitatory glycine receptor subunits, drebin (DBN1), LARGE1, SIRT1, and activity-dependent transcription factors such as CREB1.
How does NMDA receptor signaling regulate long-term synaptic plasticity?
Hippocampal long-term synaptic plasticity depends on signal amplification of NMDA receptors, which convert transient glutamate signals into sustained intracellular events that support long-term change.
What role does drebin play in synaptic plasticity?
Drebin is an actin-binding protein that organizes the dendritic spine cytoskeleton and is important for structural remodeling during synaptic plasticity.
Can lactate improve long-term synaptic plasticity?
Lactate improves long-term cognitive impairment induced by repeated neonatal sevoflurane exposures through SIRT1-mediated regulation of adult hippocampal neurogenesis and synaptic plasticity in male mice.
How is complement C3a linked to synaptic plasticity after stroke?
Complement C3a treatment accelerates recovery after stroke via modulation of astrocyte reactivity and cortical connectivity, linking glial signaling to long-term synaptic reorganization.
What is the role of excitatory glycine receptors in anxiety-related plasticity?
Excitatory glycine receptors control ventral hippocampus synaptic plasticity and anxiety-related behaviors, connecting GO:0048170 to emotional regulation.
How does vagus nerve stimulation affect PTSD-related synaptic plasticity?
Transcutaneous auricular vagus nerve stimulation alleviates anxiety-like behaviors in mice with post-traumatic stress disorder by regulating glutamatergic neurons in the anterior cingulate cortex.
What methods are used to study positive regulation of long-term neuronal synaptic plasticity?
Common methods include electrophysiology for LTP/LTD, RNA sequencing and chromatin assays for transcriptional regulation, spine imaging for structural changes, and behavioral testing for circuit-level outcomes.
How can CRISPR models help study GO:0048170?
CRISPR knockout, point-mutation, knock-in, and overexpression models allow causal testing of candidate genes, while CRISPR library screening and bioinformatics can identify new regulators of long-term neuronal synaptic plasticity.
Conclusion
GO:0048170, positive regulation of long-term neuronal synaptic plasticity, is a central biological process that integrates receptor signaling, transcriptional and epigenetic control, cytoskeletal remodeling, metabolic support, and glial interactions to produce lasting changes in synaptic structure and function. Its experimental dissection has revealed actionable nodes such as NMDA receptor signal amplification, complement C3a, excitatory glycine receptors, drebin, LARGE1, and the lactate-SIRT1 axis, with direct relevance to stroke recovery, anxiety, PTSD, and cognitive impairment. CRISPR-based knockout, point-mutation, knock-in, and overexpression models, combined with library screening and bioinformatics, provide a rigorous path to establish causality and to nominate therapeutic targets within this process.
References
- 1. Stokowska A et al.. 2023. Complement C3a treatment accelerates recovery after stroke via modulation of astrocyte reactivity and cortical connectivity.. J Clin Invest 133(10) PMID: 36995772
- 2. Pizzamiglio L et al.. 2025. Excitatory glycine receptors control ventral hippocampus synaptic plasticity and anxiety-related behaviors.. Proc Natl Acad Sci U S A 122(37):e2501118122 PMID: 40924452
- 3. MacDonald JF et al.. 2006. Hippocampal long-term synaptic plasticity and signal amplification of NMDA receptors.. Crit Rev Neurobiol 18(1-2):71-84 PMID: 17725510
- 4. Diao Z et al.. 2025. Transcutaneous auricular vagus nerve stimulation alleviates anxiety-like behaviors in mice with post-traumatic stress disorder by regulating glutamatergic neurons in the anterior cingulate cortex.. Transl Psychiatry 15(1):313 PMID: 40849423
- 5. Sekino Y et al.. 2017. Role of Drebrin in Synaptic Plasticity.. Adv Exp Med Biol 1006:183-201 PMID: 28865021
- 6. Seo BA et al.. 2025. LARGE protein drives activity-induced homeostatic resetting.. Sci Adv 11(31):eadt0703 PMID: 40737424
- 7. Qiu LL et al.. 2023. Lactate Improves Long-term Cognitive Impairment Induced By Repeated Neonatal Sevoflurane Exposures Through SIRT1-mediated Regulation of Adult Hippocampal Neurogenesis and Synaptic Plasticity in Male Mice.. Mol Neurobiol 60(9):5273-5291 PMID: 37286723
- 8. Cortés-Mendoza J et al.. 2013. Shaping synaptic plasticity: the role of activity-mediated epigenetic regulation on gene transcription.. Int J Dev Neurosci 31(6):359-69 PMID: 23665156
