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

May 1, 2026 updated by: Imunon

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

This is a randomized, adaptive, open label, multicenter trial to evaluate the safety and efficacy of intraperitoneal (IP) IMNN-001 plus chemotherapy compared to chemotherapy alone.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Eligible participants will be randomly assigned 1:1 to receive either chemotherapy plus IMNN-001 or chemotherapy alone, followed by standard of care maintenance therapy.

Randomization will stratify by confirmed biomarker tumor homologous recombination deficiency status and stage of cancer.

On both arms, the chemotherapy regimen will consist of paclitaxel 175 mg/m2 IV over 3 hours followed by carboplatin AUC 6 IV over 1 hour on Day 1 of each cycle. This will be repeated every 3 weeks for a total of 6 cycles, 3 in the neoadjuvant period and 3 in the adjuvant period following interval debulking surgery (IDS). On the experimental arm, IMNN-001 at a dose of 100 mg/m2 will be administered IP on Days 8 and 15 of the first chemotherapy cycle and then on Days 1, 8, and 15 of all subsequent 5 chemotherapy cycles for a total of 17 treatments in the neoadjuvant and adjuvant settings. When given on the same day as chemotherapy, IMNN-001 should be given at least 30 minutes after completion of carboplatin infusion. IDS will take place after 3 cycles of neoadjuvant chemotherapy (NACT) + IMNN-001 for 8 doses. Additional cycles of NACT are allowed at the discretion of the investigator but with discussion with the medical monitor.

An independent Data Monitoring Committee (iDMC) will monitor participants' safety and study conduct throughout the course of the trial.

Study Type

Interventional

Enrollment (Estimated)

500

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • United States
    • Florida
    • Missouri
      • St Louis, Missouri, United States, 63110
        • Recruiting
        • Washington University School of Medicine in St. Louis
        • Principal Investigator:
          • Andrea Hagemann, MD
        • Contact:
    • Oregon
      • Portland, Oregon, United States, 97213
        • Recruiting
        • Providence Cancer Institute
        • Contact:
        • Principal Investigator:
          • Christopher Darus, MD
    • South Dakota
      • Sioux Falls, South Dakota, United States, 57104
    • Tennessee
    • Washington
      • Spokane, Washington, United States, 99204
        • Recruiting
        • Providence Sacred Heart Medical Center & Children's Hospital
        • Principal Investigator:
          • Melanie Bergman, MD
        • Contact:
    • Wisconsin
      • Milwaukee, Wisconsin, United States, 53226
        • Recruiting
        • Froedtert and the Medical College of Wisconsin
        • Principal Investigator:
          • William Bradley, MD
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Participants must be female, ≥18 years of age, able to understand the study procedures, and agree to participate in the study by providing written informed consent.
  2. Participants with a histologically confirmed diagnosis of high-grade non-mucinous epithelial ovarian (serous, endometrioid, carcinosarcoma, mixed epithelial pathologies), fallopian tube or peritoneal cancer that is Stage IIIB/C or IV according to the International Federation of Gynecology and Obstetrics (FIGO) or tumor, node and metastasis staging criteria.
  3. Participants eligible to receive neoadjuvant chemotherapy.
  4. Participants will provide a tumor tissue sample at pre-screening or screening, via laparoscopy or image guided core biopsy for determination of confirmed biomarker tumor status (HRD vs. HRP). See biomarker status definitions in the section below.
  5. Participants of childbearing potential must have a negative serum pregnancy test (beta human chorionic gonadotropin) within 14 days prior to initiation of protocol therapy and be practicing an effective form of contraception. If applicable, participants must discontinue breastfeeding prior to study entry.

  6. Participants must have adequate:

    1. Bone marrow function: Absolute neutrophil count (ANC) greater than or equal to 1,500/µl. Exceptions may be made in patients with benign ethnic neutropenia >800/ul with approval of a medical monitor. This ANC cannot have been induced or supported by granulocyte colony stimulating factors. Platelets greater than or equal to 100,000/µl.
    2. Renal function: eGFR > 60 ml/min/1.73m2
    3. Hepatic function: Bilirubin ≤ 1.5 x ULN. SGOT (AST) and SGPT (ALT) ≤ 3.0 x ULN and alkaline phosphatase ≤ 2.5 x ULN. Exceptions due to hepatic metastases can be considered in consultation with medical monitor.
    4. Neurologic function: Neuropathy (sensory and motor) less than or equal to Grade 1 as defined by CTCAE version 5.0.
  7. Participants must have an ECOG score of 0, 1 or 2.
  8. Participants should be free of active infection requiring parenteral antibiotics or a serious uncontrolled medical illness or disorder within 4 weeks of study entry.
  9. Any hormonal therapy directed at the malignant tumor must be discontinued at least one week prior to the first treatment. Continuation of hormone replacement therapy is permitted.

Exclusion Criteria:

  1. Participant who has received prior treatment with IMNN-001.
  2. Participant who has received oral or parenteral corticosteroids (>10 mg prednisone) within 2 weeks of first dose of IMNN-001 (if applicable) or who have a clinical requirement for ongoing systemic immunosuppressive therapy such as chronic steroid use not related to chemotherapy administration.
  3. Participant has mucinous, germ cell, transitional cell, clear cell, undifferentiated, or non-epithelial ovarian cancer.
  4. Participant has low-grade or Grade 1 epithelial ovarian cancer.
  5. Participant of childbearing potential, not practicing adequate contraception, participant who is pregnant, or participant who is breastfeeding are not eligible for this trial.
  6. Participant has a bowel obstruction by clinical symptoms or computed tomography (CT) scan, sub-occlusive mesenteric disease, abdominal or gastrointestinal fistula, gastrointestinal perforation, or intra-abdominal abscess.
  7. Participant has been diagnosed and/or treated with any therapy for invasive cancer <3 years from study enrollment, completed adjuvant chemotherapy and/or targeted therapy at least 3 years from enrollment, or completed adjuvant hormonal therapy less than 4 weeks from enrollment.
  8. Participant with definitively treated non-invasive malignancies such as cervical carcinoma in situ, ductal carcinoma in situ, grade 1 or 2 Stage IA endometrioid endometrial cancer, or non-melanomatous skin cancer are allowed.
  9. Participant with concurrent severe medical problems unrelated to the malignancy that would significantly limit full compliance with the study or expose the participant to extreme risk or decreased life expectancy.
  10. Participant has known active hepatitis or HIV with detectable viral load.
  11. Participant has a known contraindication or uncontrolled hypersensitivity to the components of paclitaxel, carboplatin, IMNN-001, or their excipients.
  12. Prior treatment for high-grade non-mucinous epithelial ovarian, fallopian tube, or peritoneal cancer (e.g., immunotherapy, anticancer therapy, surgery, radiation therapy).
  13. Participant is receiving treatment for active autoimmune disease. "Active" refers to any condition currently requiring therapy. Examples of autoimmune disease include systemic lupus erythematosus, multiple sclerosis, inflammatory bowel disease and rheumatoid arthritis.
  14. Participant who has received prior radiotherapy to any portion of the abdominal cavity or pelvis is excluded. Prior radiation for localized cancer of the breast, head and neck, or skin is permitted, if it was completed at least 3 years prior to registration, and the participant remains free of recurrent or metastatic disease.
  15. Participant who has received prior chemotherapy for any abdominal or pelvic tumor is excluded. Participant may have received prior adjuvant chemotherapy for localized breast cancer, if it was completed at least three years prior to registration, and that the participant remains free of recurrent or metastatic disease.
  16. Participant with history or evidence upon physical examination of CNS disease, including primary brain tumor, seizures not controlled with standard medical therapy, any brain metastases, or history of cerebrovascular accident (CVA, stroke), transient ischemic attack (TIA) or subarachnoid hemorrhage within six months of the first date of treatment on this study.
  17. Participant who will receive bevacizumab with the neoadjuvant or adjuvant treatment, or as maintenance will be excluded.
  18. Participant with any condition/anomaly that would interfere with the appropriate placement of the IP catheter for study drug administration including abdominal surgery within 4 weeks of study entry (for reason other than IP port placement or laparoscopic diagnosis of epithelial ovarian cancer), intestinal dysfunction as defined in #6 above.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Experimental Arm: IMNN-001 + SOC Chemotherapy + SOC Maintenance Therapy
IMNN-001 in combination with standard neoadjuvant and adjuvant chemotherapy followed by standard of care maintenance therapy
Drug: IMNN-001 (IL-12 Plasmid Formulated with PEG-PEI-Cholesterol Lipopolymer)
100 mg/m2 IP given weekly during frontline treatment
Other Names:
  • GEN-1
Drug: Paclitaxel
175 mg/m2 IV given every 21 days for 6 cycles during frontline treatment
Drug: Carboplatin
AUC 6 IV given every 21 days for 6 cycles during frontline treatment
Drug: Olaparib
Olaparib (300 mg orally every 12 hours for 2 years) for patients with somatic or germline BRCAmut.
Other Names:
  • Lynparza
Drug: Niraparib
Niraparib (200-300 mg orally daily for 3 years; dosing based on participant's weight and platelet counts) for either HRD/BRCAmut & HRD/BRCAwt.
Other Names:
  • Zejula
Active Comparator: Control Arm: SOC Chemotherapy + SOC Maintenance Therapy
Standard neoadjuvant and adjuvant chemotherapy followed by standard of care maintenance therapy.
Drug: Paclitaxel
175 mg/m2 IV given every 21 days for 6 cycles during frontline treatment
Drug: Carboplatin
AUC 6 IV given every 21 days for 6 cycles during frontline treatment
Drug: Olaparib
Olaparib (300 mg orally every 12 hours for 2 years) for patients with somatic or germline BRCAmut.
Other Names:
  • Lynparza
Drug: Niraparib
Niraparib (200-300 mg orally daily for 3 years; dosing based on participant's weight and platelet counts) for either HRD/BRCAmut & HRD/BRCAwt.
Other Names:
  • Zejula

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Overall Survival
Time Frame: 48 months
Overall Survival is defined as the time (in months) from the date of randomization to the date of death by any cause.
48 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Chemotherapy Response Score
Time Frame: 12 weeks
After the interval debulking surgery takes place, participants will be assessed for a chemotherapy response score by the pathologist and scored based on CRS3, CRS2, or CRS1.
12 weeks
Surgical Response
Time Frame: 12 weeks
After the interval debulking surgery takes place, participants are scored in terms of their interval debulking status with a score of R0, R1, or R2.
12 weeks
Time to Second Line Treatment
Time Frame: 13 months
Time to second line treatment is defined as the time (in months) from the date of randomization to the date of second line chemotherapy treatment or death, whichever occurs first.
13 months
Objective Response Rate
Time Frame: 12 weeks
Objective Response Rate is defined as the proportion of participants with objective evidence of CR or PR prior to IDS. The evaluation of objective response rate will be based on investigator (site) assessment of the images following RECIST v1.1 criteria.
12 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Imunon

Investigators

  • Study Chair: Premal H Thaker, M.D., Washington University School of Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 9, 2025

Primary Completion (Estimated)

October 31, 2032

Study Completion (Estimated)

October 31, 2032

Study Registration Dates

First Submitted

April 1, 2025

First Submitted That Met QC Criteria

April 1, 2025

First Posted (Actual)

April 7, 2025

Study Record Updates

Last Update Posted (Actual)

May 4, 2026

Last Update Submitted That Met QC Criteria

May 1, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 201-24-301

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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