A Phase 2, Open-label, Single-arm Study Of Autologous M-CENK Adoptive Cell Therapy And N-803 (IL-15 Superagonist) In Combination With Gemcitabine In Participants With Recurrent Platinum-Resistant High-Grade Ovarian Cancer

NCT06710288 | Recruiting Phase 2 DMC FDA Drug

• 1 other identifier: ResQ209
• Study Type: interventional
• Target: 20
• Locations: 1 country
• Sites: 2

Brief Summary

This is phase 2 single arm study evaluating the safety and preliminary efficacy of M-CENK adoptive cell therapy and fixed dose of N-803 in combination with gemcitabine in participants with platinum-resistant high-grade ovarian cancer (HGOC).Up to 20 participants will receive M-CENK (IV) and N-803 (SC) in combination with gemcitabine (IV). Participants will undergo an apheresis procedure for the collection of mononuclear cells (MNCs) at least 1 day prior to Cycle 1 for manufacturing of M-CENK. Starting in Cycle 1, participants will receive gemcitabine and starting in Cycle 2 they will also receive M-CENK and N-803, until no additional M-CENK is available or confirmed PD per iRECIST, unless the participant is potentially deriving benefit per Investigator's assessment. Participants who complete the study treatment or discontinue study treatment will be followed for survival/disease status every 12 weeks (± 2 weeks) for up to 12 months after the last study treatment or until death, lost to follow-up, or withdrawal of consent.

Conditions

Platinum-resistant Ovarian Cancer

Keywords

high grade ovarian cancer; M-CENK; N-803

Outcome Measures

Primary Outcomes (7)

• Evaluate Progression Free Survival (PFS)

  Measured by RECIST v1.1 and iRECIST

  Cycle 1 Day 1 through End of Study, up to 2 years

• Evaluate Overall Survival (OS)

  Cycle 1 Day 1 through End of Study, up to 2 years

• Evaluate Objective Response Rate (ORR)

  Measured by RECIST v1.1 and iRECIST

  Cycle 1 Day 1 through End of Study, up to 2 years

• Evaluate Duration of Response (DOR)

  Measured by RECIST v1.1 and iRECIST

  From time of first response to the date of disease progression or death, up to 2 years

• Evaluate Disease Control Rate (DCR)

  Measured by RECIST v1.1 and iRECIST

  Cycle 1 Day 1 through End of Study, up to 2 years

• Evaluate the time to progression or death on the next line of treatment (PFS2) of participants receiving M-CENK adoptive cell therapy and N-803 in combination with gemcitabine.

  Measured by RECIST v1.1 and iRECIST and survival status

  Cycle 1 Day 1 through End of Study, up to 2 years

• Evaluate the CA-125 response rate (RR) per Gynecologic Cancer Intergroup (GCIC) CA-125 criteria.

  Measured by the CA-125 result

  Cycle 1 Day 1 through End of Study, up to 2 years

Secondary Outcomes (8)

• Safety: Evaluate adverse events

  Apheresis to 30 days after the last dose of study treatment or the end of treatment visit, up to 13 months

• Safety: Incidence of clinically significant changes in comprehensive metabolic panel (CMP)

  Screening through Follow-up, up to 2 years

• Safety: Incidence of clinically significant changes in Hematology blood panel

  Screening through Follow-up, up to 2 years

• Safety: Incidence of clinically significant changes in Temperature

  Screening through Follow-up, up to 2 years

• Safety: Incidence of clinically significant changes in Heart Rate

  Screening through Follow-up, up to 2 years

Other Outcomes (3)

• Exploratory: Evaluate the number and phenotype of M-CENK cells performed by flow cytometry and mass cytometry (CyTOF).

  During M-CENK production between Apheresis and Cycle 2 Day 1, up to 2 months

• Exploratory: Characterize the functionality of M-CENK cells as measured by intracellular staining for cytokines, surface marker staining, and assessments of cytotoxicity.

  During M-CENK production between Apheresis and Cycle 2 Day 1, up to 2 months

• Exploratory: Assess serum cytokine levels before and after M-CENK infusions.

  Cycle 2 Day 1 through last dose of M-CENK, up to 13 months

Study Arms (1)

All subjects

EXPERIMENTAL

Gemcitabine plus M-CENK plus N-803

Drug: Gemcitabine; Biological: N-803; Biological: M-CENK

Interventions

Gemcitabine DRUG

Dose: 800 mg/m2 intravenously (IV) Frequency: administered on Day 1, Day 8, and Day 15 of each cycle (every 4 weeks)

Also known as: gemcitabine hydrocholoride, Gemzar

All subjects

N-803 BIOLOGICAL

Dose: fixed dose of 1.2 mg subcutaneously (SC) Frequency: administered on Day 1 and Day 15 of each cycle starting at Cycle 2 (every 4 weeks) and when the last dose of M-CENK is administered, N-803 will be administered on Days 1 and 15 of the same cycle followed by 3 additional doses, 2 weeks apart (total of 5 N-803 doses).

All subjects

M-CENK BIOLOGICAL

Dose: 0.15 to 0.75 × 109 cells per infusion intravenously (IV) Frequency: administered on Day 1 of each cycle as long as M-CENK cells are available.

Also known as: Autologous Memory Cytokine Enriched Natural Killer

All subjects

Eligibility Criteria

• Age: 18 Years - 85 Years
• Sex: female
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• ≥18 years and \<85 years old.
• Able to understand and provide a signed informed consent that fulfills the relevant Institutional Review Board (IRB) or Independent Ethics Committee (IEC) guidelines.
• Participants must be appropriate for single-agent therapy as the next line of therapy, as determined by the Investigator.
• Participants must have received prior treatment with bevacizumab.
• Confirmed diagnosis of platinum-resistant high-grade epithelial ovarian cancer, primary peritoneal or fallopian tube. Platinum-resistant is defined as a relapse within 6 months of receiving 1 to 3 platinum-based chemotherapy regimens.
• Must have at least one lesion that meets the definition of measurable disease defined by RECIST v1.1 criteria.
• Must have received at least one but no more than three prior systemic lines of anticancer therapy and had progressive disease (PD) while receiving or immediately after receiving the previous therapy. Progression will be calculated from the date of the last administered dose of platinum based therapy to the date of radiographic imaging that showed evidence of progression.
• Participants who had received one line of platinum-based therapy must have received at least four cycles of their initial platinum-containing regimen, had a response (complete or partial), and then had PD between 3 and 6 months after their last dose.
• Participants who had previously received two or three lines of platinum-based therapy must have had PD while receiving the therapy or within 6 months after the last dose.
• Participants with germline or somatic BRCA1 or BRCA2 mutations must have received prior PARP inhibitor therapy as maintenance or treatment.
• Must have adequate peripheral venous access on both arms, or be willing to have temporary vascular access placed for apheresis collection, if deemed necessary by the Investigator.
• Must be able to sit or recline with limited movement for approximately 6 hours during apheresis procedure.
• Participants must have been previously tested for FRα. If the test result was positive, they must have been offered treatment with mirvetuximab soravtansine-gynx.
• Agreement to practice effective contraception for female participants of childbearing potential. Female participants of childbearing potential must agree to use effective contraception for up to 7 months after completion of study treatment. Effective contraception includes surgical sterilization (eg, tubal ligation), orals, injectables, 2 forms of barrier methods (eg, diaphragm), intrauterine devices (IUDs), and hormonal therapy.
• Eastern cooperative oncology group (ECOG) performance status of ≤ 1.

You may not qualify if:

• In order to participate in the study, participants must not meet any of the following criteria:
• Participants with clear cell, mucinous, or sarcomatous histology, mixed tumors containing any of the above histologies, or low grade or borderline ovarian tumor.
• Distant metastasis outside of the abdominopelvic cavity (e.g., central nervous system, pulmonary, osseous, etc.).
• Have had anti-tumor chemotherapy or other investigational agents within 2 weeks prior to M-CENK cell infusion, or immunotherapy within 4 weeks prior, or those who have not recovered from adverse events due to agents administered more than two weeks prior. The intent of the language is to ensure that anti-tumor chemotherapy or other investigational agents are not administered to participants within the specified window since they can potentially affect M-CENK cell activity. Therefore, the washout period is defined by time from NK cell infusion and not patient enrollment. During eligibility confirmation from the study team is requested to confirm that according to the planned M-CENK cell dosing schedule, the washout period should be completed, based on each drug class.
• Current bowel obstruction, history of bowel obstruction, or high risk for bowel obstruction (in the opinion of the investigator).
• Poor oral intake requiring parenteral nutrition or dependence on intravenous fluids.
• Presence or history of ascites.
• Receiving any other investigational agents.
• Solid organ transplant (allograft) recipients.
• Known additional malignancy that is progressing or requires active treatment, or history of other malignancy within 2 years of the first dose of study treatment with the exception of cured basal cell or squamous cell carcinoma of the skin, superficial bladder cancer, carcinoma in situ of the cervix, or other non-invasive or indolent malignancy, or cancers from which the patient has been disease-free for \> 1 year after treatment with curative intent.
• Known hypersensitivity or anaphylaxis to sulfa-containing study medication(s).
• Known allergy to dimethyl sulfoxide (DMSO).
• Prior history of immune-related toxicity during immune therapy that resulted in permanent discontinuation of therapy (as recommended per product label or consensus guidelines) OR any immune-related toxicity requiring intensive or prolonged immunosuppression to manage (with the exception of endocrinopathy that is well-controlled on replacement hormones) are excluded.
• Autoimmune disease: history of inflammatory bowel disease, including ulcerative colitis and Crohn's disease, are excluded from this study, as are patients with a history of symptomatic disease (e.g., rheumatoid arthritis, systemic progressive sclerosis \[scleroderma\], systemic lupus erythematosus, autoimmune vasculitis \[Wegener's granulomatosis\]) and motor neuropathy considered of autoimmune origin (e.g., Guillain-Barre syndrome and myasthenia gravis). participants with Hashimoto thyroiditis are eligible.
• Systemic corticosteroid therapy (\> 10 mg of prednisone or equivalent dose of systemic steroids for at least 4 weeks prior to NK cell infusion). The intent of this language is to ensure that systemic steroids are not administered to participants within the specified window since this can potentially affect NK cell activity. Therefore, the washout period is defined by time from NK cell infusion and not patient enrollment. During eligibility confirmation the study team is requested to confirm that according to the planned NK cell dosing schedule, the washout period should be completed.

Sponsors & Collaborators

• ImmunityBio, Inc.: lead

Study Sites (2)

Chan Soon-Shiong Institute for Medicine

El Segundo, California, 90245, United States

RECRUITING

Hoag

Newport Beach, California, 92663, United States

RECRUITING

MeSH Terms

Interventions

Gemcitabine; ALT-803

Intervention Hierarchy (Ancestors)

Heterocyclic Compounds; Deoxycytidine; Cytidine; Pyrimidine Nucleosides; Pyrimidines; Heterocyclic Compounds, 1-Ring

Study Officials

• Leonard Sender, MD

  ImmunityBio, Inc.

  STUDY DIRECTOR

Central Study Contacts

Jayson Garmizo

CONTACT

310-912-2230; jayson.garmizo@immunitybio.com

Kamin Personett

CONTACT

Kamin.Personett@Immunitybio.com

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 5, 2024
• First Posted: November 29, 2024
• Study Start: November 6, 2024
• Primary Completion (Estimated): May 1, 2027
• Study Completion (Estimated): May 1, 2027
• Last Updated: October 20, 2025

Record last verified: 2025-10

Locations

US (2)