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NCT Number: NCT07722741

Personalized Neoantigen Vaccine Plus IL-12 (INO-9012) Versus Active Surveillance in Subjects With High-Risk HCC

This is a randomized, open-label, multi-site Phase II study of a personalized neoantigen DNA vaccine (GNOS-PV02) and plasmid encoded IL-12 (INO-9012) in subjects with histologically or cytologically confirmed diagnosis of HCC based on pathology report, who were eligible to undergo definitive resection, have demonstrated laboratory, radiographic and/or pathologic high-risk criteria for recurrence (described under eligibility), have no evidence of disease (NED) as per MRI approximately 28 days post resection, and are able to provide a tissue sample for personalized neoantigen DNA vaccine development.

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Key information

Conditions

HCC

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Johns Hopkins University

Baltimore, Maryland, 21287, United States

Location contact

Principal Investigator, MD

CONTACT

[email protected]

410-955-8893

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Written informed consent
  • ≥18 years of age
  • Histologically or cytologically confirmed diagnosis of HCC (not accepted: fibrolamellar, sarcomatoid, mixed cholangiocarcinoma)
  • Child-Pugh Class A liver score
  • Documented virology status of hepatitis
  • Availability of a representative post-resection tumor tissue sample
  • ECOG performance status of 0 or 1
  • Adequate organ function
  • Women of childbearing potential (WOCBP) and men must be willing to use an adequate method of contraception

Exclusion criteria

  • Is currently participating in and receiving study drug or has participated in a study of an investigational agent and received study drug or used an investigation device, within 4 weeks to baseline
  • Evidence of residual, recurrent, or metastatic disease at randomization
  • Active or history of autoimmune disease or immune deficiency
  • Diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of study drug
  • Diagnosed additional malignancy within 5 years prior to baseline, except for: (a) non-invasive carcinomas subject to successful curative treatment in the opinion of the investigator which require no further therapy and (b) other malignancies for which subjects have undergone potentially curative therapy and have been considered disease free for at least 3 years prior to screening.
  • Active infection requiring systemic therapy
  • Is pregnant, breastfeeding or expecting to conceive or father children within the study's projected duration
  • History of human immunodeficiency virus (HIV) (HIV I/II antibodies).
  • Co-infection with HBV and hepatitis D viral infection
  • Co-infection with HBV and HCV
  • Has received a live vaccine within 30 days of planned start of study

Treatment and study plan

GNOS-PV02 + INO-9012 delivered by intradermal injection, followed by electroporation

Biological

delivered by intradermal injection and electroporation

Electroporation Device

Device

GNOS-PV02 + INO-9012 ID followed by electroporation

INO-9012

Biological

cytokine interleukin-12 (IL-12), a vaccine adjuvant

Primary outcomes

  1. Recurrence-free survival

    Time frame: Up to 5 years

    RFS is defined as the time from randomization to any recurrence (local, locoregional, regional or distant), occurrence of new primary HCC, as assessed by the investigator, or death due to any cause, whichever occurs first.

Secondary outcomes

  1. Incidence of treatment emergent adverse events (safety and tolerability)

    Time frame: Up to 5 years

    Summary adverse events according to CTCAE 6.0

  2. Time to extra-hepatic spread or macro-vascular invasion

    Time frame: Up to 5 years

    Time to extra-hepatic spread or macro-vascular invasion (TTEHS/MVI)

  3. Overall survival

    Time frame: Up to 5 years on study + 3 years follow up

    OS is defined as time from randomization to death of any cause

Study contacts

Contact information is provided by the study sponsor or research team.

Joann Peters, MHA

CONTACT

[email protected]

434-825-2551

Sponsors and collaborators

Lead sponsor

Geneos Therapeutics

Industry

Registry information

Official study title

IMPACT31: A Randomized Open-label, Multi-center, Phase II Adjuvant Study of a Personalized Neoantigen DNA Vaccine (GNOS-PV02) and Plasmid Encoded IL-12 (INO-9012) Versus Active Surveillance in Subjects With High-Risk HCC

Acronym: IMPACT31

Important dates

Study start
2026
Primary completion
2029
Study completion
2032
First posted
Jul 23, 2026
Registry last updated
Jul 28, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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