Gene Therapy for HER-Positive Cancer (SENTRY-HER2)
Sponsor: Vironexis Biotherapeutics Inc.
ClinicalTrials ID:NCT07192432
This Phase 1/2 trial evaluates VNX-202, an AAV gene therapy, in HER2-positive cancers. It involves dose escalation to determine safety and efficacy, with a focus on PK and safety. Eligibility includes adults with confirmed HER2-positive tumors. Interventions involve single IV infusions of VNX-202 at varying dose levels. Participants are monitored for up to 5 years post-dosing.
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Program Overview
This is a Phase 1/2, first-in-human, open-label, dose-escalating and expansion trial designed to assess the safety and efficacy of VNX-202 in patients with HER2 positive cancers.
Description
VNX-202 is an investigational adeno-associated virus (AAV) gene therapy developed to express a secreted anti-HER2/anti-CD3 scFv diabody (termed GP202). GP202 binds to human epidermal growth factor receptor 2 (HER2) on the surface of cancer cells and to cluster of differentiation (CD)3 on the surface of T cells, inducing the T cells to kill the HER2-positive cancer cells.
Following a single intravenous (IV) infusion, the vector induces the liver to continuously secrete GP202 into the bloodstream, resulting in long-term, consistent serum levels of GP202. Compared with conventionally delivered protein therapies, this gene therapy approach obviates the requirement for episodic dosing and avoids a possible reduction or loss of efficacy associated with trough levels of the protein between treatment cycles.
In this 2-part study, dose-finding data from Part 1 of the study (n=~12 patients) will be used determine the dose for Part 2 in patients. Part 1 is a dose-finding PK study in adults ≥18 years old with previously treated metastatic HER2 solid tumors designed to determine the minimal dose that achieves target PK serum levels of GP202 at steady state (8-week timepoint) without dose-limited toxicities, defined as the recommended Part 2 dose (RP2D). Participants must have histologically or cytologically confirmed HER2 positive solid tumor cancers that has progressed during or following previous anti-cancer treatment. Part 2 (n=~15) will be opened following data safety monitoring board review of Part 1 data and is designed to determine the safety and pharmacokinetics (PK) of VNX-202 at the RP2D in a broader array of subjects. Part 2 will comprise of participants with early stage HER2-positive tumors who are at risk of disease relapse and/or metastasis despite having received prior systemic and/or local treatment. Each cohort will comprise ≥5 participants (Cohort A: breast cancer; Cohort B: gastric cancer; Cohort C: all otherHER2-positive tumor types). Patients will be followed for safety and efficacy up to 5 years post VNX-202 dosing.
Eligibility Criteria
Inclusion Criteria
- Age: ≥18 years of age
- Histologically or cytologically confirmed diagnosis of HER-2 positive solid tumor as defined in the protocol
- Part 1: presence of advanced or metastatic disease that has progressed during or following previous treatment
- Part 2: Early stage HER-2 positive cancers with high risk for relapse following completion of SOC or after neoadjuvant systemic treatment
- AAV specified capsid total antibody ≤1:400
- ECOG performance status of 0 or 1
- Life expectancy ≥3 months
- Protocol-specified ranges for renal, liver, cardiac and pulmonary function
- Protocol-specified ranges for hematology parameters
Exclusion Criteria
- Hepatoxicity (AST or ALT > 2x upper limit of normal)
- Known active CNS or leptomeningeal disease
- History of thrombotic microangiopathy or cardiomyopathy, or evidence of sensory neuropathy
- Pregnant or nursing (lactating) women
- History of other malignancy within 5 years prior to screening as defined in protocol
- History of hypersensitivity to corticosteroids or history of corticosteroid-related toxicity Concurrent anti-cancer treatment in another investigational trial
Locations
| FACILITY | ZIP | CITY | STATE |
|---|---|---|---|
| SCRI Denver DDU at HealthOne | 80218 | Denver | Colorado |
| SCRI Oncology Partners | 37203 | Nashville | Tennessee |
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