Source 1primary paper2026MED
Toolkit/CRISPR activation and interference
CRISPR activation and interference
Also known as: CRISPRa, CRISPR-based transcriptional activators, CRISPRi
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
CRISPR activation and interference (CRISPRa/CRISPRi) is a CRISPR-based gene regulation method that uses Nab2- or Egr3-targeted single-guide RNAs to modulate transcription. In the cited 2022 study, these tools were used in Neuro2a cells to mimic bidirectional cocaine-associated expression changes in Nab2 and Egr3.
Usefulness & Problems
Why this is useful
This method is useful for experimentally increasing or decreasing transcription of specific endogenous genes without changing the underlying DNA sequence. In the supplied study, it enabled controlled modeling of cocaine-associated bidirectional regulation of Nab2 and Egr3 in a neuronal cell context.
Source:
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Source:
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Problem solved
The approach addresses the problem of reproducing bidirectional, gene-specific transcriptional changes associated with cocaine exposure in a tractable experimental system. The provided evidence specifically supports its use for Nab2 and Egr3 regulation in Neuro2a cells.
Published Workflows
Objective: Couple nuclear and mitochondrial editing with maturation strategies to produce metabolically competent, structurally mature iPSC-CMs with more adult-like phenotypes.
Why it works: The abstract argues that mitochondrial immaturity is the key bottleneck in iPSC-CMs, so combining genome-guided activation/editing with environmental maturation cues is expected to better restore mitochondrial biogenesis, oxidative metabolism, and adult-like phenotypes.
activation of the PGC-1α-NRF1/2-TFAM axisimproved nuclear-mitochondrial coordinationmtDNA editingCRISPRamtDNA editingmetabolic conditioningelectromechanical stimulation3D tissue cultureEV-mediated mitochondrial transfer
Stages
- 1.Genome-guided intervention selection(library_design)
The review centers the workflow on mitochondrial immaturity and therefore first identifies nuclear regulators and mitochondrial editing tools that can directly modulate this bottleneck.
Selection: Target key regulators of mitochondrial biogenesis and select genome-guided tools including CRISPR-based transcriptional activators/repressors and mtDNA editors.
- 2.Genome-guided mitochondrial enhancement(functional_characterization)
This stage tests whether genome-guided interventions improve core mitochondrial properties identified as limiting iPSC-CM maturity.
Selection: Apply CRISPRa-mediated activation and mtDNA base editing to enhance mitochondrial mass and OXPHOS function.
- 3.Integration with environmental maturation cues(secondary_characterization)
The abstract states that integration with environmental maturation strategies further promotes adult-like phenotypes beyond genome-guided interventions alone.
Selection: Combine genome-guided interventions with metabolic conditioning, electromechanical stimulation, 3D tissue culture, or EV-mediated mitochondrial transfer.
- 4.Translational validation and standardization considerations(confirmatory_validation)
The abstract explicitly identifies these issues as remaining translational challenges that must be addressed for practical deployment.
Selection: Assess remaining translational challenges including efficient mitochondrial delivery, metabolic homeostasis, and multi-omics validation.
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete method used to build, optimize, or evolve an engineered system.
Techniques
Structural CharacterizationTarget processes
editingImplementation Constraints
Implementation in the cited work required CRISPRa or CRISPRi systems combined with sgRNAs targeted to Nab2 or Egr3. The supplied evidence identifies Neuro2a cells as the validated context, but it does not provide details on Cas effector variants, promoter design, delivery method, or selection strategy.
The supplied direct evidence is limited to one study and one application context in Neuro2a cells targeting Nab2 and Egr3. The evidence provided here does not specify construct architecture, quantitative effect sizes, off-target assessment, or validation across multiple genes, organisms, or independent groups.
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Observations
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
successMammalian Cell Lineapplication demoNeuro2a
Inferred from claim claim_2 during normalization. CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells. Derived from claim claim_2. Quoted text: Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
Supporting Sources
Source 2primary paper2022
Ranked Claims
CRISPR-guided mitochondrial biogenesis is presented as a frontier for producing metabolically competent, structurally mature iPSC-CMs for disease modeling and therapy.
Integrative approaches combining genome-guided interventions with environmental maturation cues yield the most adult-like iPSC-CM phenotypes reported to date.
CRISPRa-mediated activation of PGC-1α, NRF1, and GATA4 combined with mtDNA base editors enhances mitochondrial mass and OXPHOS function in the reviewed literature context.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-KDM1a downregulated Egr3 and Nab2 transcripts and produced bidirectional expression changes similar to cocaine exposure in Neuro2A cells.
We were able to downregulate Egr3 and Nab2 transcripts and cause bidirectional expression changes in D1-MSNs and D2-MSNs similar to cocaine exposure in Neuro2A cells.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Opto-CRISPR-p300 activation system induced Egr3 and Nab2 transcripts and caused bidirectional transcriptional regulation in D1-MSNs and D2-MSNs.
In contrast, our Opto-CRISPR-p300 activation system induced the Egr3 and Nab2 transcripts and caused bidirectional transcription regulations in D1-MSNs and D2-MSNs.
Approval Evidence
2 sources4 linked approval claimsfirst-pass slugs crispra, crispr-activation-and-interference
This review synthesizes genome-guided interventions (CRISPRa and mtDNA editing)... CRISPRa-mediated activation of PGC-1α, NRF1, and GATA4...
Source:
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
application claimsupports
CRISPR-guided mitochondrial biogenesis is presented as a frontier for producing metabolically competent, structurally mature iPSC-CMs for disease modeling and therapy.
Source:
comparative claimsupports
Integrative approaches combining genome-guided interventions with environmental maturation cues yield the most adult-like iPSC-CM phenotypes reported to date.
Source:
performance claimsupports
CRISPRa-mediated activation of PGC-1α, NRF1, and GATA4 combined with mtDNA base editors enhances mitochondrial mass and OXPHOS function in the reviewed literature context.
Source:
tool applicationsupports
CRISPRa and CRISPRi combined with Nab2- or Egr3-targeted sgRNAs mimicked cocaine-associated bidirectional expression changes in Neuro2a cells.
Using CRISPR activation and interference (CRISPRa and CRISPRi) tools combined with Nab2 or Egr3 targeted sgRNAs, we mimicked these bidirectional changes in Neuro2a cells.
Source:
Comparisons
Source-backed strengths
The cited study reports that CRISPRa and CRISPRi, when paired with Nab2- or Egr3-targeted sgRNAs, successfully mimicked cocaine-associated bidirectional expression changes. This supports programmable, locus-directed transcriptional activation or repression in a defined neuronal cell model.
Ranked Citations
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