A Randomized Phase 3 Trial Evaluating the Safety & Efficacy of IP IMNN-001 Administered in Combination w/ Standard Neoadjuvant & Adjuvant Chemotherapy in Newly Diagnosed Patients w/ Advanced EOC, Fallopian Tube or Primary Peritoneal Cancer

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Investigational drug late phase More information Active drug More information Moderate burden on patient More information

Trial Details

Sponsor: Imunon (industry)

Phase: 3

Start date: July 9, 2025

Planned enrollment: 500

Trial ID: NCT06915025
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More trial details at ClinicalTrials.gov More info

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chevron Show for: IMNN-001 (GEN-1)

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Goal: To determine whether adding intraperitoneal IMNN-001 to standard neoadjuvant and adjuvant carboplatin/paclitaxel improves overall survival versus chemotherapy alone in newly diagnosed advanced epithelial ovarian, fallopian tube, or primary peritoneal cancer, with subsequent standard-of-care maintenance therapy allowed in both arms.

Patients: Adult women (≥18 years) with histologically confirmed high-grade, non-mucinous epithelial ovarian, fallopian tube, or primary peritoneal cancer, FIGO stage IIIB/C or IV, eligible for neoadjuvant chemotherapy and interval debulking surgery. ECOG 0–2 and adequate marrow, renal, hepatic, and neurologic function are required. Key exclusions include low-grade histology, clear cell and mucinous subtypes, prior therapy for the current disease, active bowel obstruction or GI fistula/perforation, need for systemic immunosuppression, active hepatitis or HIV with detectable viral load, planned bevacizumab use, and conditions preventing safe IP catheter placement.

Design: Randomized, adaptive, open-label, multicenter phase 3 study with 1:1 allocation to chemotherapy plus IMNN-001 versus chemotherapy alone. Stratification by homologous recombination deficiency status and disease stage. Independent data monitoring committee oversight. Planned enrollment of 500. Interval debulking after neoadjuvant therapy, with allowance for additional neoadjuvant cycles per investigator with medical monitor input. Standard-of-care maintenance therapy permitted in both arms.

Treatments: Control: Standard paclitaxel 175 mg/m2 IV over 3 hours plus carboplatin AUC 6 IV over 1 hour on Day 1 every 3 weeks for 6 cycles (3 neoadjuvant, 3 adjuvant) followed by SOC maintenance per local practice (e.g., PARP inhibitors such as olaparib or niraparib where appropriate). Experimental: Same chemotherapy plus intraperitoneal IMNN-001 100 mg/m2 on Days 8 and 15 of cycle 1, then Days 1, 8, and 15 of cycles 2–6 (total 17 IP doses), with IMNN-001 administered at least 30 minutes after carboplatin when on the same day. IMNN-001 is an intraperitoneal, DNA-mediated IL-12 immunotherapy (plasmid encoding human IL-12 formulated with a PEG-PEI-cholesterol lipopolymer) designed to drive local IL-12 expression within the peritoneal cavity, augmenting IFN-γ and NK/CD8+ T-cell activity and decreasing immunosuppression in the tumor microenvironment while minimizing systemic cytokine exposure. In a randomized phase 1/2 study (OVATION-2), IMNN-001 plus chemotherapy showed numerically longer PFS and OS and higher surgical response metrics versus chemotherapy alone; safety was manageable without cytokine release syndrome signals, though the study was not powered for definitive survival outcomes. A global phase 3 program is ongoing to confirm efficacy with OS as the primary endpoint.

Outcomes: Primary: Overall survival from randomization to death from any cause over approximately 48 months. Key secondary endpoints include chemotherapy response score at interval debulking (CRS1–3), surgical cytoreduction status at IDS (R0/R1/R2), time to second-line treatment or death, and objective response rate by RECIST v1.1 prior to IDS.

Burden on patient: Moderate. Patients receive standard IV carboplatin/paclitaxel for six 3-week cycles and undergo interval debulking surgery, consistent with usual care. The experimental arm adds frequent intraperitoneal administrations (17 total) requiring IP catheter placement and multiple clinic visits on Days 1, 8, and 15 across cycles, increasing procedural and visit burden and potential abdominal discomfort. Tumor tissue is required at pre-screening/screening for HRD status, but no intensive pharmacokinetic sampling is specified. Maintenance therapy and imaging schedules align with standard practice. Travel and time commitments are higher than SOC due to repeated IP dosing, while other assessments are similar to routine management.

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Sites (4)

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Washington University School of Medicine in St. Louis

St Louis, Missouri, 63110, United States

[email protected] / No phone

Status: Recruiting

Providence Cancer Institute

Portland, Oregon, 97213, United States

[email protected] / No phone

Status: Recruiting

Erlanger Health

Chattanooga, Tennessee, 37403, United States

[email protected] / No phone

Status: Recruiting

Providence Sacred Heart Medical Center & Children's Hospital

Spokane, Washington, 99204, United States

[email protected] / No phone

Status: Recruiting

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