Phase 1 Study of GEN2 in Patients With Advanced Solid Tumors

A Phase 1 Study of GEN2 in Adult Patients With Locally Advanced or Metastatic Solid Tumor Malignancies

Protocol GVO-1102 is a phase 1, open label, multi-center study in adult patients with locally advanced or metastatic solid tumors. This study includes two parts: dose escalation and dose expansion. In the dose escalation phase, GEN2 will be administered at increasing dose levels via intravenous infusion or intratumoral injection on Days 1, 3 and 8 every 4 weeks. Valganciclovir will start dosing on Day 12 and continue for 10 days (through Day 21). Once a recommended dose has been defined in approximately 35-45 patients, the dose expansion phase will initiate to further assess intravenous administration of GEN2 in specific tumor types. Approximately 15 patients per tumor type will be enrolled in the intravenous dose expansion phase.

Study Overview

• Status: Terminated
• Conditions: Solid Tumor, Adult
• Intervention / Treatment: Biological: GEN2 + Valganciclovir

Detailed Description

GEN2 is a non-replicating off-the-shelf gene therapy vector product being developed as a cancer immunotherapy to activate a patient's immune system against their personal cancer antigens (neoantigens). The vector payload encodes for a suicide gene, an enhanced viral thymidine kinase enzyme (HSV-eTK), which in the presence of a prodrug, valganciclovir, causes the tumor to release patient specific tumor antigens. These neoantigens in the presence of a human immune modulator cytokine, granulocyte-macrophage colony-stimulating factor (hGM-CSF), results in the generation of immune effector cells. These effector cells maintain continually amplifying therapeutic immune responses as more tumor cells are killed and release antigen and will potentially kill any new tumor metastases that arise.

• Study Type: Interventional
• Enrollment (Actual): 37
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • California
    • Duarte, California, United States, 91010
      • City of Hope
    • Los Angeles, California, United States, 90095
      • UCLA Hematology-Oncology
    • Los Angeles, California, United States, 90033
      • University of Southern California-Keck School of Medicine
  • Indiana
    • Indianapolis, Indiana, United States, 46202
      • Indiana University Melvin and Bren Simon Comprehensive Cancer Center
  • Iowa
    • Iowa City, Iowa, United States, 52242
      • University of Iowa Health Care
  • Tennessee
    • Nashville, Tennessee, United States, 37203
      • SCRI Oncology Partners
  • Virginia
    • Fairfax, Virginia, United States, 22031
      • Next Oncology

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Adult patients with a locally advanced or metastatic solid tumor that has progressed or was non-responsive to prior therapy
• Measurable disease as determined by response evaluation criteria in solid tumors (RECIST) v1.1.
• At least 18 years of age.
• Eastern Cooperative Oncology Group (ECOG) performance status score of 0 - 1.
• For patients with HCC: Child-Pugh Class A
• Available archived tumor tissue sample or a lesion that can be safely biopsied if the archived sample is not available.
• Adequate renal, liver and bone marrow function.
• Ability to swallow VGCV tablets.
• Willingness of men and women of child-bearing potential (WCBP) to observe conventional and highly effective birth control for the duration of treatment and for 12 months following the last dose of study treatment. Patients who are pregnant or lactating are excluded.
• For the dose expansion phase: Patients with hepatocellular carcinoma or cutaneous malignancy: no more than 2 prior systemic regimens for metastatic disease. Patients with breast cancer: no more than 2 prior cytotoxic regimens for metastatic disease (single-agent hormone therapy or hormone-based doublets do not count). Patients with cutaneous malignancies includes patients with melanoma, cutaneous squamous cell carcinoma, basal cell carcinoma and Merkel cell carcinoma.
• For the intratumoral injection dose escalation phase: patients with cutaneous malignancy, including patients with melanoma, cutaneous squamous cell carcinoma, basal cell carcinoma and Merkel cell carcinoma. Patients must have at least 1 measurable and injectable lesion and an additional site of measurable distant metastases for assessment of systemic immune response to therapy. Patients may not have received prior treatment with oncolytic therapy. Patients for whom tyrosine kinase inhibitor therapy would be considered standard of care should have received these agents prior to enrollment in this trial. Patients may not have a history of significant bleeding diathesis.

Exclusion Criteria:

• Investigational agent or anticancer therapy within 28 days or 5 elimination half-lives prior to Cycle 1 Day 1.
• Prior receipt of talimogene laherparepvec (TVEC) or any other oncolytic virus (including but not limited to RP1, RP2, or BNT111).; prior receipt of a live vaccine within 28 days prior to Cycle 1 Day 1.
• Any unresolved toxicities from prior therapy greater than CTCAE Grade 1 at the time of enrollment (alopecia and other nonacute toxicities are not exclusionary)
• Washout from prior major surgery and radiotherapy (less than 28 days)
• Symptomatic primary central nervous system (CNS) tumor or metastases; symptomatic leptomeningeal carcinomatosis; untreated spinal cord compression. Patients with CNS lesions may be eligible if CNS lesions are asymptomatic or if neurological symptoms are stable, the patient is not receiving steroids to manage CNS symptoms, and no CNS surgery or radiation has been performed for 28 days (14 days for stereotactic radiation).
• Active uncontrolled systemic bacterial, viral, or fungal infection, which in the opinion of the Investigator makes it undesirable for the patient to participate in the trial
• Clinically significant active malabsorption syndrome or other conditions such as refractory nausea and vomiting, external biliary shunt, or significant bowel resection likely to affect gastrointestinal absorption of valganciclovir
• Known contraindications to the ganciclovir class
• For patients with hepatocellular carcinoma, patients with active hepatitis B are excluded; patients with evidence of prior exposure who have a negative hepatitis surface antigen (HbsAg) and who do not require antiviral therapy are allowed. Patients with hepatitis C are allowed but may not be on antiviral therapy during study participation and for two weeks prior to Cycle 1 Day 1.
• Known HIV positivity
• Current treatment with systemic steroids at or above 10 mg/day of prednisone (or its equivalent). Inhalational and topical steroids are acceptable

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Determine the recommended phase 2 dose (RP2D) of GEN2 by intravenous infusion and intratumoral injection.	The RP2D will be determined by evaluating the number of subjects with treatment related adverse events and Dose Limiting Toxicities	First 28 days.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Safety and tolerability as assessed by adverse event monitoring	Adverse events as characterized by type, frequency, severity (graded by NCI CTCAE v 5.0), timing, seriousness and relationship to study therapy	Up to 24 months
To assess replication competent retrovirus (RCR) in peripheral blood mononuclear cells (PBMCs)		Up to 36 months
To assess vector integration into genomic deoxyribonucleic acid (DNA) of PBMCs		Up to 36 months
Overall response rate (ORR) by RECIST 1.1 (Response Evaluation in Solid Tumors Version 1.1) by Investigator Review	ORR is defined as the proportion of participants whose best overall response with confirmation status is rated as (confirmed or unconfirmed) complete response (CR) or (confirmed or unconfirmed) partial response (PR) based on RECIST v1.1.	Up to 24 months
Disease control rate including a best overall response of Complete Response (CR), Partial Response (PR) or stable disease (SD)	DCR is defined as the proportion of participants whose best overall response with confirmation status is rated as (confirmed or unconfirmed) CR, (confirmed or unconfirmed) PR or stable disease (SD) based on RECIST v1.1.	Up to 24 months
Duration of response (DOR)	DOR is measured from the day the criteria are first met for time point overall response rated as CR or PR (whichever is first recorded) until the first date of documented radiological disease progression per RECIST v1.1 or death in the absence of progression.	Up to 24 months
Pharmacokinetics (PK) - Intravenous Administration Cohorts Only: area under the concentration-time curve from the time of dosing to 48 hours after dosing (AUC48h)	AUC48h will be recorded from the PK plasma samples collected	Up to 24 months
PK - Intravenous Administration Cohorts Only: Maximum Concentration (Cmax)	Cmax will be recorded from the PK plasma samples collected.	Up to 24 months
Assess the immunogenicity of GEN2	Serial blood samples will be screened for anti-vector antibodies (AVAs) and neutralizing antibodies	Up to 24 months

Collaborators and Investigators

• Sponsor: GenVivo, Inc.

Study record dates

Study Major Dates

• Study Start (Actual): March 4, 2024
• Primary Completion (Actual): March 1, 2026
• Study Completion (Actual): March 1, 2026

Study Registration Dates

• First Submitted: April 19, 2024
• First Submitted That Met QC Criteria: April 25, 2024
• First Posted (Actual): April 30, 2024

Study Record Updates

• Last Update Posted (Actual): March 13, 2026
• Last Update Submitted That Met QC Criteria: March 11, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; Heterocyclic Compounds; Heterocyclic Compounds, 2-Ring; Heterocyclic Compounds, Fused-Ring; Guanine; Hypoxanthines; Purinones; Purines; Ganciclovir; Acyclovir; Valganciclovir
• Other Study ID Numbers: Protocol GVO-1102

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Sharing Time Frame: Within one year of Last Patient off.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No