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ID: EVX-01 STATUS: ACTIVE

EVX-01

Investigational

Also known as: EVX01, Evaxion EVX-01, AI-Immunology Neoantigen Vaccine

A personalized neoantigen peptide vaccine developed by Evaxion Biotech using AI-driven neoantigen prediction. Phase 1 data in melanoma showed 67% overall response rate when combined with anti-PD-1 therapy, with neoantigen-specific T-cell responses detected in all patients. Distinct from mRNA-based approaches like mRNA-4157.

Other Moderate Evidence 18 Sources

Research Statistics

Total Sources
18
Human Studies
12
Preclinical
6
Evidence Rating Moderate Evidence
Research Depth 3/5
Global Coverage 3/5
Mechanism Plausibility 3/5
Overall Score
3 /5

Phase 2 NSCLC peptide vaccine with multi-country trials and clear HER-2 targeting mechanism.

Last reviewed February 2026 How we rate →
~
Evidence Level
moderate
Not approved for human use by any regulatory agency
Limited human clinical trial data
Consult a healthcare provider before use
Not FDA Approved WADA Prohibited

Research Dossier

01 / 7

Overview

What is EVX-01 and what does the research say?

Identity
Also Known As
EVX01 • Evaxion EVX-01 • AI-Immunology Neoantigen Vaccine
Type
Personalized synthetic long peptide (SLP) vaccine
Length
0 amino acids
Weight
Variable (patient-specific)
Sequence
N/A (small molecule)
Molecular Structure
Hydrophobic
Polar
Positive
Negative

Mechanism of Action

The proposed mechanisms of EVX-01 are based on Phase 1/2a clinical data and established neoantigen vaccine immunology. The personalized approach uses AI-driven prediction to identify patient-specific tumor targets.

How It Works (Simplified)

EVX-01 is a personalized cancer vaccine that trains the immune system to attack tumor-specific targets:

1
AI Target Selection

PIONEER platform analyzes tumor DNA to predict which mutations will generate immunogenic neoantigens unique to your cancer.

2
Dendritic Cell Uptake

Long peptides are taken up by dendritic cells at injection site, processed, and presented on MHC-I and MHC-II molecules.

3
T-Cell Priming

Both CD8+ cytotoxic and CD4+ helper T cells are activated, creating a coordinated immune response against tumor neoantigens.

4
Checkpoint Synergy

Combined with anti-PD-1 therapy, vaccine-primed T cells can effectively attack tumor cells without immunosuppressive brakes.

Scientific Pathways

Neoantigen Identification Pipeline (AI-Driven Target Selection)

Tumor Biopsy → WES + RNA-Seq → Mutation Calling → PIONEER AI Analysis

                                    MHC binding + Immunogenicity scoring

                                    Top 10-15 neoantigen peptides selected

Immune Response Generation (T-Cell Activation)

EVX-01 + Adjuvant → DC Uptake → Lymph Node Migration → MHC Presentation

                                              CD8+ and CD4+ T-Cell Priming

                                              Tumor Trafficking + Killing

Key Research: Phase 1/2a trial (NCT03715985) demonstrated 100% T-cell immunogenicity and 67% ORR in melanoma.

Important Limitations

  • Single-arm Phase 1/2a trial with only 12 evaluable patients
  • No randomized comparison to pembrolizumab alone
  • Historical control comparison has inherent limitations
  • Personalized manufacturing adds 6-8 weeks from biopsy to first dose
  • Scalability and cost-effectiveness not yet demonstrated

Evidence-Chained Benefits

Evidence-Chained Benefits

Research findings linked to mechanisms and clinical outcomes

Mechanism AI-driven neoantigen prediction via PIONEER platform for personalized tumor targeting
Supported 4 direct studies
Benefit shown to generate tumor-specific T-cell responses
Evidence Level
Moderate
12 Human
4 Animal
2 In Vitro
Mechanism Synthetic long peptide (SLP) design enabling both CD4+ and CD8+ T-cell activation
Supported 3 direct studies
Benefit appears to improve anti-tumor immune response durability
Evidence Level
Moderate
12 Human
2 Animal
1 In Vitro
Mechanism Combination with anti-PD-1 checkpoint inhibition removing T-cell suppression
Supported 5 direct studies
Benefit appears to enhance clinical response rates in melanoma
Evidence Level
Moderate
12 Human
3 Animal
Mechanism Confidence
Established
Supported
Emerging
Evidence Level
High
Moderate
Low
Very Low

What to Expect

Timeline based on observations from published studies. Individual responses may vary.

Week 1-4 NCT03715985

Initial vaccination series (weeks 1, 2, 3, 4). Based on Phase 1/2a protocol, neoantigen-specific T-cell responses begin developing. Early immune priming occurs.

Week 4-14 NCT03715985

Continued vaccination schedule (weeks 6, 8, 11, 14). T-cell expansion and maturation. Clinical responses may begin to emerge in combination with checkpoint inhibitor.

Week 14-26 NCT03715985

Maintenance vaccinations (weeks 20, 26). In Phase 1/2a, objective responses were typically evident by week 12-24. Durable T-cell memory formation.

6+ months NCT03715985

Long-term follow-up showed 88% of responders maintained response at 12 months, 63% at 24 months. T-cell responses persisted beyond 1 year.

Research-Based Observations

This timeline reflects observations from published clinical and preclinical studies. Individual responses may vary significantly. This is not a guarantee of effects or a dosing schedule. Consult qualified healthcare providers for personalized guidance.

Quality Checklist

Visual indicators to help evaluate EVX-01 product quality

Good Signs (6 indicators)
Manufactured under GMP conditions by qualified facility
Patient-specific formulation based on tumor sequencing
Administered through clinical trial with proper oversight
Certificate of analysis provided for each batch
Proper cold chain maintained during storage and transport
Administered with validated adjuvant system
Warning Signs (4 indicators)
Manufacturing timeline exceeding 8 weeks from biopsy
Fewer than 10 neoantigens included in formulation
Adjuvant system different from validated protocol
Storage conditions outside 2-8C range
Bad Signs (6 indicators)
Not administered through approved clinical trial
No tumor sequencing verification
Missing certificate of analysis
Unknown or unvalidated manufacturing source
No adjuvant included with peptide formulation
Claims of 'off-the-shelf' neoantigen vaccine (contradicts personalized approach)
Positive quality indicator
Requires evaluation
Potential quality issue

For Research Evaluation Only

These quality indicators are general guidelines based on typical peptide characteristics. Professional laboratory testing (HPLC, mass spectrometry) provides definitive quality verification. This checklist is for initial visual evaluation only.

Peptide Interactions

Known and theoretical interactions when combining EVX-01 with other peptides. Based on published research and mechanistic considerations.

Synergistic
Compatible
Caution
Avoid

EVX-01 is designed for combination with anti-PD-1 therapy. Vaccine primes neoantigen-specific T cells while checkpoint inhibitor removes immunosuppressive brakes. Phase 1 data from this combination.

Alternative neoantigen vaccine platform (mRNA vs peptide). Both target personalized tumor neoantigens through different delivery mechanisms. Not typically combined.

Research Note: Interaction data is based on published literature, mechanistic understanding, and theoretical considerations. Most peptide combinations lack direct clinical study. This information is for educational purposes only and does not constitute medical advice. Always consult qualified healthcare providers.

References

18 Sources
12 Human
6 Preclinical

Full reference list available on request. All citations link to PubMed for verification.

Methodology Note

This dossier synthesizes available evidence from peer-reviewed literature, regulatory documents, and clinical trial registries. Evidence strength ratings follow a modified GRADE approach.

For complete methodology details, see our Methodology page.

Important Disclaimer

This dossier is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making health decisions.

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