GO:0050769 positive regulation of neurogenesis: Signaling Mechanisms, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0050769 (positive regulation of neurogenesis) describes any biological process that activates or increases the frequency, rate, or extent of neurogenesis, the generation of new neurons from neural stem and progenitor cells.
• Positive regulation of neurogenesis is essential for hippocampal-dependent learning, memory, and mood regulation, and its dysregulation is linked to depression, Alzheimer's disease, and other neurological disorders.
• Key signaling pathways that positively regulate neurogenesis include NF-kappaB, noradrenaline, serotonin 2B receptor, Shh, and CaMKII-AMPA receptor signaling.
• MicroRNAs such as miR-9 participate in positive feedback loops that sustain neurogenesis, while proBDNF can negatively regulate peripheral neurogenesis, highlighting the balance of positive and negative regulators.
• Gut microbiota modulation by rifaximin can positively influence microglial function and hippocampal neurogenesis, linking peripheral signals to central neurogenesis.
• CRISPR-based knockout, knock-in, and overexpression models are powerful tools to dissect the causal roles of specific genes in positive regulation of neurogenesis.
Description
Neurogenesis is the process by which new neurons are generated from neural stem and progenitor cells, and it occurs primarily during embryonic development but also persists in specific adult brain regions such as the hippocampal dentate gyrus. The Gene Ontology term GO:0050769, positive regulation of neurogenesis, encompasses all molecular events that enhance the initiation, maintenance, or rate of this process. Understanding these positive regulatory mechanisms is critical because they underlie cognitive flexibility, emotional resilience, and brain repair. Research over the past two decades has identified numerous positive regulators of neurogenesis, including neurotransmitters, growth factors, transcription factors, and microRNAs. For example, noradrenaline in the hippocampus positively regulates spatial working memory and neurogenesis in rats, while serotonin 2B receptor signaling promotes the development and function of raphe serotonin neurons. In contrast, negative regulators such as proBDNF signaling can restrict peripheral neurogenesis in sensory ganglia. The balance between positive and negative regulation determines the net output of new neurons and is often disrupted in disease. This article provides a comprehensive overview of GO:0050769, covering its definition, biological significance, core mechanisms, key genes, disease relevance, and state-of-the-art research methods including CRISPR-based models. All statements are grounded in published literature to support researchers in designing experiments and interpreting data related to positive regulation of neurogenesis.
positive regulation of neurogenesis At A Glance
| GO ID | GO:0050769 |
|---|---|
| GO term | positive regulation of neurogenesis |
| Ontology | biological_process |
| Definition | Any process that activates or increases the frequency, rate or extent of neurogenesis, the generation of cells within the nervous system. |
| Synonyms | activation of neurogenesis; stimulation of neurogenesis; up regulation of neurogenesis; up-regulation of neurogenesis; upregulation of neurogenesis |
| Major function | Enhances the generation of new neurons from neural stem and progenitor cells, supporting brain development, plasticity, and repair. |
| Related processes | Neurogenesis (GO:0007399), regulation of neurogenesis (GO:0050767), negative regulation of neurogenesis (GO:0050768). |
| Key regulators | NF-kappaB, noradrenaline, serotonin 2B receptor, Shh, miR-9, CaMKII-AMPA receptor signaling, gut microbiota. |
| Disease relevance | Depression, Alzheimer's disease, mood disorders, sensory neuropathy, and cognitive impairment. |
What Is GO:0050769?
According to the Gene Ontology, GO:0050769 (positive regulation of neurogenesis) is defined as any process that activates or increases the frequency, rate, or extent of neurogenesis, the generation of cells within the nervous system. In other words, it includes all molecular signals, cellular events, and environmental cues that promote the production of new neurons from neural stem and progenitor cells, without specifying the anatomical location or developmental stage.
Why Is positive regulation of neurogenesis Important in Cell Biology?
Positive regulation of neurogenesis is fundamental for brain development, adult hippocampal plasticity, and cognitive function. Its dysregulation contributes to major neurological and psychiatric disorders, including depression, Alzheimer's disease, and age-related cognitive decline. Understanding the positive regulators of neurogenesis can reveal therapeutic targets for promoting brain repair and improving mood and memory.
• Supports embryonic brain development and the formation of functional neural circuits.
• Maintains adult hippocampal neurogenesis, which is critical for learning, memory, and pattern separation.
• Modulates mood and emotional behavior; impaired neurogenesis is linked to depression and anxiety.
• Plays a role in recovery after brain injury and in neurodegenerative conditions such as Alzheimer's disease.
• Integrates peripheral signals (e.g., gut microbiota, noradrenaline) with central nervous system function.
• Involves positive feedback loops (e.g., miR-9) that sustain neurogenic programs.
• Balances negative regulators (e.g., proBDNF) to fine-tune neuronal production.
• Provides targets for pharmacological and genetic interventions to enhance neurogenesis.
• Serves as a model for studying cell fate decisions and stem cell biology.
• Enables the development of CRISPR-based disease models to test causal roles of specific genes.
What Happens During positive regulation of neurogenesis?
Activation of Neural Stem and Progenitor Cells
In simple terms: This step is about waking up dormant stem cells in the brain so they start dividing and producing new neurons.
Positive regulation of neurogenesis begins with the activation of neural stem cells (NSCs) and neural progenitor cells (NPCs) in neurogenic niches such as the subgranular zone of the dentate gyrus and the subventricular zone. Signaling molecules like noradrenaline positively regulate this activation, as shown by increased spatial working memory and neurogenesis in rats. Similarly, NF-kappaB signaling in the hippocampus promotes adult neurogenesis and is relevant to mood disorders and antidepressant activity. These signals converge on transcriptional programs that drive cell cycle entry and symmetric or asymmetric divisions.
Proliferation and Fate Specification
In simple terms: Once activated, the stem cells multiply and then decide what type of brain cells they will become.
Following activation, NSCs undergo proliferation, expanding the progenitor pool. Positive regulators such as Shh signaling play a key role in vertebrate retinal development by promoting progenitor proliferation and fate specification. Serotonin 2B receptor signaling positively regulates the development and function of raphe serotonin neurons, influencing fate acquisition. MicroRNA-9 (miR-9) is involved in a positive feedback mechanism that regulates its own expression during neurogenesis, helping to maintain the neurogenic fate. These processes ensure an adequate supply of neurons for specific brain regions.
Migration and Integration of Newborn Neurons
In simple terms: Newly made neurons travel to their final location and plug into existing brain circuits.
After fate specification, newborn neurons migrate to their target layers and extend dendrites and axons to integrate into existing circuits. Positive regulation of neurogenesis includes signals that promote this migration and integration. For instance, hippocampal noradrenaline positively regulates spatial working memory and neurogenesis, likely by enhancing the functional integration of new neurons. In Alzheimer's disease models, the Zexieyin formula alleviates cognitive deficits by promoting neurogenesis and strengthening synaptic plasticity via post-synaptic CaMKII modulation of AMPA receptors. This step is critical for the functional contribution of new neurons to memory and mood.
Synaptic Plasticity and Functional Output
In simple terms: The new neurons form connections that strengthen brain plasticity and improve learning and memory.
The final stage of positive regulation of neurogenesis involves the establishment of functional synapses and the enhancement of synaptic plasticity. CaMKII-AMPA receptor signaling is a key mediator of this process; its modulation by Zexieyin formula promotes neurogenesis and strengthens synaptic plasticity in the mouse hippocampus, leading to improved cognitive function in Alzheimer's disease models. Similarly, serotonin 2B receptor-mediated positive regulation of raphe serotonin neurons contributes to mood regulation and behavioral outputs. These functional changes underlie the beneficial effects of neurogenesis on learning, memory, and emotional resilience.
Key Genes Involved in GO:0050769 positive regulation of neurogenesis
The following genes and proteins are representative positive regulators of neurogenesis, supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| NFKB1 | Transcription factor mediating NF-kappaB signaling; promotes adult hippocampal neurogenesis | Implicated in mood disorders and antidepressant activity; target for modulating neurogenesis |
| HTR2B | Serotonin 2B receptor; positively regulates raphe serotonin neuron development and function | Role in mood regulation and neurogenesis; potential target for psychiatric disorders |
| SHH | Sonic hedgehog signaling; promotes progenitor proliferation and fate specification in retina | Key regulator of neurogenesis in vertebrate retinal development |
| MIR9 | MicroRNA-9; participates in positive feedback loop during neurogenesis | Regulates its own expression to sustain neurogenesis; biomarker and therapeutic target |
| BDNF | Brain-derived neurotrophic factor; proBDNF negatively regulates peripheral neurogenesis | Context-dependent roles; proBDNF restricts sensory ganglia neurogenesis |
| CAMK2A | Calcium/calmodulin-dependent protein kinase II alpha; modulates AMPA receptors to promote neurogenesis and synaptic plasticity | Target of Zexieyin formula in Alzheimer's disease models |
| GRIN1 | NMDA receptor subunit; involved in activity-dependent neurogenesis | Modulates survival and integration of newborn neurons |
| CREB1 | Transcription factor; downstream of many neurogenic signals | Regulates genes involved in neuronal survival and plasticity |
| WNT3A | Wnt signaling ligand; promotes neural stem cell proliferation | Positive regulator of hippocampal neurogenesis |
| NOTCH1 | Notch signaling receptor; regulates neural stem cell maintenance and differentiation | Context-dependent positive and negative roles |
| SOX2 | Transcription factor; maintains neural progenitor stemness | Essential for neurogenesis and reprogramming |
| NEUROD1 | Basic helix-loop-helix transcription factor; drives neuronal differentiation | Marker of neurogenesis and target for fate conversion |
| DCX | Doublecortin; microtubule-associated protein in migrating neurons | Clinical and experimental marker of newborn neurons |
| GFAP | Glial fibrillary acidic protein; marks radial glia-like neural stem cells | Used to identify neural stem cells in neurogenic niches |
| MKI67 | Marker of proliferation; indicates dividing progenitor cells | Quantifies proliferating neural progenitors |
| SLC6A4 | Serotonin transporter; regulates serotonin availability | Modulates serotonin-dependent neurogenesis |
| ADRB2 | Beta-2 adrenergic receptor; mediates noradrenaline effects | Links noradrenaline to positive regulation of neurogenesis |
| TNF | Tumor necrosis factor; can modulate neurogenesis via NF-kappaB | Inflammatory regulator of hippocampal neurogenesis |
How Is positive regulation of neurogenesis Regulated?
Positive regulation of neurogenesis is controlled by a complex network of signaling pathways and environmental factors. NF-kappaB signaling in the hippocampus is a key mediator that can be influenced by antidepressants and mood stabilizers. Noradrenaline, acting through adrenergic receptors, positively regulates spatial working memory and neurogenesis in rats. Serotonin 2B receptor signaling promotes the development and function of raphe serotonin neurons, linking serotonergic tone to neurogenesis. The Sonic hedgehog pathway positively regulates progenitor proliferation in retinal development. MicroRNA-9 forms a positive feedback loop that sustains neurogenesis. In contrast, proBDNF signaling negatively regulates peripheral neurogenesis in sensory ganglia, illustrating the balance between positive and negative regulators. Additionally, gut microbiota modulation by rifaximin can positively influence microglial function and protect against depression-like behaviors, partly through effects on neurogenesis. These regulatory mechanisms are potential targets for therapeutic intervention.
positive regulation of neurogenesis and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NFKB1 | Depression, mood disorders | Knockout mice, chronic stress models, antidepressant treatment |
| HTR2B | Mood regulation, serotonin neuron development | Knockout rats, raphe neuron cultures |
| CAMK2A | Alzheimer's disease, synaptic plasticity | Knock-in mice, Zexieyin formula treatment |
| BDNF | Sensory neuropathy, peripheral neurogenesis | ProBDNF overexpression in sensory ganglia |
| SHH | Retinal development, neurodegeneration | Conditional knockout in retina, organoids |
Depression and Mood Disorders
Impaired hippocampal neurogenesis is a well-established contributor to depression and mood disorders. Positive regulation of neurogenesis by NF-kappaB signaling is relevant to antidepressant activity, as many antidepressants increase adult hippocampal neurogenesis. Rifaximin-mediated gut microbiota regulation modulates microglial function and protects against chronic unpredictable mild stress-induced depression-like behaviors in adolescent rats, partly by promoting neurogenesis. Noradrenaline in the hippocampus positively regulates spatial working memory and neurogenesis, suggesting that noradrenergic dysfunction may contribute to mood disorders. These findings highlight the therapeutic potential of enhancing positive regulation of neurogenesis for depression.
Alzheimer's Disease and Cognitive Decline
Alzheimer's disease is characterized by progressive cognitive decline and reduced neurogenesis. The Zexieyin formula alleviates Alzheimer's disease in mice by promoting neurogenesis and strengthening synaptic plasticity through post-synaptic CaMKII modulation of AMPA receptors. This suggests that positive regulation of neurogenesis can counteract cognitive deficits. Additionally, Shh signaling, which positively regulates neurogenesis in retinal development, may have broader implications for neurodegeneration. Targeting positive regulators of neurogenesis could be a strategy to slow cognitive decline.
Sensory Neuropathies and Peripheral Neurogenesis
In the peripheral nervous system, proBDNF signaling negatively regulates neurogenesis in the sensory ganglia of adult rats. This indicates that positive regulation of neurogenesis is also relevant to sensory function and neuropathy. Understanding the balance between positive and negative regulators in sensory ganglia may lead to new treatments for peripheral neuropathies.
From positive regulation of neurogenesis-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of a candidate gene reduce positive regulation of neurogenesis? | CRISPR knockout in neural stem cells or mouse models |
| Does a specific point mutation in a signaling protein alter neurogenesis? | CRISPR point mutation knock-in in iPSCs or mice |
| Does overexpression of a positive regulator enhance neurogenesis? | CRISPR-mediated overexpression or lentiviral delivery |
| How does a tagged protein localize during neurogenesis? | Knock-in of fluorescent or epitope tags |
| Can pharmacological agents modulate neurogenesis via a target gene? | Pharmacological intervention in knockout vs wild-type models |
| What is the role of non-coding RNAs in positive regulation? | CRISPR knockout of miRNA loci or overexpression |
How to Study the positive regulation of neurogenesis Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify pathways up-regulated during neurogenesis |
| Single-cell RNA-seq | Cell-type-specific transcriptomes | Characterize neural stem cell heterogeneity |
| Immunofluorescence | Protein localization and cell markers | Quantify DCX+ newborn neurons and GFAP+ stem cells |
| EdU/BrdU labeling | DNA synthesis and cell proliferation | Measure progenitor proliferation in neurogenic niches |
| Phosphoproteomics | Kinase activity and signaling networks | Study CaMKII-AMPA receptor signaling |
| Behavioral tests | Learning, memory, mood-related behaviors | Assess functional impact of neurogenesis |
| Electrophysiology | Synaptic transmission and plasticity | Measure integration of newborn neurons |
| CRISPR screening | Gene function at scale | Identify novel positive regulators of neurogenesis |
Transcriptomic and Epigenomic Profiling
RNA sequencing (RNA-seq) and single-cell RNA-seq can identify gene expression changes associated with positive regulation of neurogenesis. For example, transcriptomic analysis of hippocampal tissue after noradrenaline manipulation reveals pathways linked to neurogenesis and memory. ATAC-seq and ChIP-seq can uncover regulatory elements and transcription factor binding sites, such as NF-kappaB targets, that drive neurogenic programs.
Imaging and Lineage Tracing
Immunofluorescence for markers like DCX, GFAP, and MKI67 allows visualization and quantification of newborn neurons and proliferating progenitors in neurogenic niches. Two-photon microscopy and confocal imaging can track the migration and integration of new neurons in live animals. Lineage tracing using inducible Cre recombinase systems can label neural stem cells and follow their progeny over time.
Proteomics and Phosphoproteomics
Mass spectrometry-based proteomics can quantify protein expression and post-translational modifications during neurogenesis. Phosphoproteomics is particularly useful for studying signaling pathways such as CaMKII-AMPA receptor signaling, which is modulated by Zexieyin formula in Alzheimer's disease models. These methods can identify novel positive regulators and their downstream effectors.
Behavioral and Functional Assays
Behavioral tests such as the Morris water maze, novel object recognition, and forced swim test assess the functional consequences of altered neurogenesis. For instance, noradrenaline's positive regulation of spatial working memory and neurogenesis was demonstrated using behavioral tasks in rats. Electrophysiology can measure synaptic plasticity in newborn neurons, as shown for CaMKII-AMPA receptor modulation.
How CRISPR Can Be Used to Study GO:0050769 positive regulation of neurogenesis
Knockout
CRISPR knockout (KO) is used to delete candidate genes and assess their necessity for positive regulation of neurogenesis. For example, knocking out NF-kappaB components in neural stem cells can reveal their role in adult hippocampal neurogenesis. KO models can be generated in cell lines, primary neural cultures, or animal models to study loss-of-function effects on proliferation, differentiation, and integration.
Point Mutation
CRISPR point mutation knock-in introduces specific amino acid changes to study the function of critical residues in positive regulators. For instance, mutating phosphorylation sites in CaMKII or AMPA receptor subunits can dissect their role in neurogenesis and synaptic plasticity. This approach is valuable for modeling human genetic variants associated with neurodevelopmental or neurodegenerative disorders.
Knock-in
CRISPR knock-in can insert reporter genes (e.g., GFP) or epitope tags into endogenous loci to track the expression and localization of positive regulators. Tagging DCX or SOX2 allows real-time visualization of neural stem cells and newborn neurons. Knock-in of conditional alleles (e.g., loxP sites) enables spatial and temporal control of gene expression.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can increase the expression of positive regulators to test sufficiency. Overexpressing miR-9 or noradrenaline receptors can enhance neurogenesis and improve behavioral outcomes. Overexpression models are useful for identifying downstream targets and for therapeutic screening.
How EDITGENE Supports positive regulation of neurogenesis Research
Researchers studying positive regulation of neurogenesis-related genes often need to determine whether a candidate gene is causally involved in the process, and CRISPR-based models provide the most direct way to test this. By combining knockout, point mutation, knock-in, and overexpression strategies, it is possible to dissect the precise roles of individual genes and signaling pathways in neurogenesis.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of neurogenesis research.
Frequently Asked Questions About positive regulation of neurogenesis
What is GO:0050769 positive regulation of neurogenesis?
GO:0050769 is a Gene Ontology biological process term defined as any process that activates or increases the frequency, rate, or extent of neurogenesis, the generation of new neurons from neural stem and progenitor cells.
What genes are involved in positive regulation of neurogenesis?
Key genes include NFKB1, HTR2B, SHH, MIR9, BDNF, CAMK2A, and many others that encode signaling molecules, transcription factors, and microRNAs promoting neurogenesis.
How is positive regulation of neurogenesis studied?
Researchers use knockout and transgenic animal models, CRISPR screens, RNA-seq, immunofluorescence for markers like DCX and GFAP, and behavioral tests to study neurogenesis.
What diseases are linked to positive regulation of neurogenesis?
Dysregulation is associated with depression, Alzheimer's disease, mood disorders, and sensory neuropathies.
What is the role of NF-kappaB in neurogenesis?
NF-kappaB signaling in the hippocampus positively regulates adult neurogenesis and is relevant to mood disorders and antidepressant activity.
How does noradrenaline affect neurogenesis?
Hippocampal noradrenaline acts as a positive regulator of spatial working memory and neurogenesis in rats.
Can gut microbiota influence neurogenesis?
Yes, rifaximin-mediated gut microbiota regulation modulates microglial function and protects against depression-like behaviors, partly by promoting neurogenesis.
What is the role of miR-9 in neurogenesis?
miR-9 participates in a positive feedback mechanism that regulates its own expression during neurogenesis, helping to sustain the neurogenic program.
How does proBDNF affect neurogenesis?
proBDNF signaling negatively regulates peripheral neurogenesis in the sensory ganglia of adult rats, contrasting with positive regulators.
What CRISPR models are available for neurogenesis research?
EDITGENE offers knockout, point mutation knock-in, tagged knock-in, overexpression, and CRISPR library screening services tailored for neurogenesis studies.
Conclusion
GO:0050769 positive regulation of neurogenesis is a central biological process that governs the generation of new neurons, with profound implications for brain development, plasticity, and disease. Key signaling pathways involving NF-kappaB, noradrenaline, serotonin, Shh, and CaMKII-AMPA receptors have been identified as positive regulators, and their dysregulation contributes to depression, Alzheimer's disease, and other disorders. Advances in CRISPR-based models and multi-omics approaches are accelerating the discovery of novel regulators and therapeutic targets. EDITGENE provides comprehensive services to support researchers in dissecting the causal roles of genes in positive regulation of neurogenesis.
References
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- 3. Belmer A et al.. 2018. Positive regulation of raphe serotonin neurons by serotonin 2B receptors.. Neuropsychopharmacology 43(7):1623-1632 PMID: 29453444
- 4. Bortolotto V et al.. 2014. NF-κB mediated regulation of adult hippocampal neurogenesis: relevance to mood disorders and antidepressant activity.. Biomed Res Int 2014:612798 PMID: 24678511
- 5. Gulino R et al.. 2023. Hippocampal Noradrenaline Is a Positive Regulator of Spatial Working Memory and Neurogenesis in the Rat.. Int J Mol Sci 24(6) PMID: 36982688
- 6. Davila JL et al.. 2014. A positive feedback mechanism that regulates expression of miR-9 during neurogenesis.. PLoS One 9(4):e94348 PMID: 24714615
- 7. Ma W et al.. 2021. Negative regulation by proBDNF signaling of peripheral neurogenesis in the sensory ganglia of adult rats.. Biomed Pharmacother 144:112273 PMID: 34700232
- 8. Sun Y et al.. 2024. Zexieyin formula alleviates Alzheimer's disease via post-synaptic CaMKII modulating AMPA receptor: Involved in promoting neurogenesis to strengthen synaptic plasticity in mice hippocampus.. Phytomedicine 131:155802 PMID: 38852473
