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N-803+ Pembrolizumab

Phase 2

Non-Small Cell Lung Cancer | Small molecule | Oncology |ImmunityBio, Inc.|Last Updated: Jan 14, 2026

Target and mechanism

Molecular targetIL-15
Target classCytokine
ModalitySmall molecule

Also known as N-803 (Cohort 2 part B), N-803, N-803 and BCG, N803, N-803 (IL-15 Superagonist)

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment40

FDA Designations

No designations recorded

Clinical trial landscape

N-803+ Pembrolizumab · 1 trial · 13 indications

Phase 2 1
NCT03228667QUILT-3.055: A Study of Combination Immunotherapies in Patients Who Have Previously Received Treatment With Immune Checkpoint InhibitorsNon-Small Cell Lung Cancer
ACTIVE NOT_RECRUITING40 Analytics
PHASE2ACTIVE NOT_RECRUITING
QUILT-3.055: A Study of Combination Immunotherapies in Patients Who Have Previously Received Treatment With Immune Checkpoint Inhibitors
Non-Small Cell Lung CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

ORR, defined as Investigator-assessed CR + PR per RECIST v1.1.
Evaluated from the first dose of study drug and repeated at each scheduled disease-assessment visit for up to 24 months (or until progression/death), with the time-to-response summarized using Kaplan-Meier methods

ORR reflects tumor shrinkage and is the key measure of antitumor activity.

Prolongation of OS with NAI therapy by ALC response, where: - OS is defined as the time from first study drug administration to death resulting from any cause. - ALC response is defined as achievement or maintenance of an on-treatment ALC ≥ 1,000 cells/μ
Measured from the date of the first study-drug administration to the date of death (any cause) and followed for up to 24 months after the last dose (or until death), allowing the correlation with on-treatment ALC changes

OS is the gold-standard efficacy endpoint; the protocol explores whether an ALC rise predicts a survival benefit.

Secondary Endpoints

ALC response to NAI therapy
From the date of first study-drug administration until the earlier of death or the planned end of follow-up, assessed up to 24 months.
Prolongation of therapy
From the date of first study-drug administration until the earlier of death or the planned end of study follow-up, assessed up to 24 months after the last dose of study drug.
Overall survival (OS) for all patients and subgroups
From the date of first study-drug administration until the earlier of death or the planned end of study follow-up, assessed up to 24 months after the last dose of study drug.
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1OTHERPatients with any of the cancers listed below who have progressed on or after single-agent checkpoint inhibitor therapy after experiencing an initial complete response (CR) or partial response (PR) while taking a checkpoint inhibitor. 1a - Non-small cell lung cancer 1b - Small cell lung cancer 1c - Urothelial carcinoma 1d - Head and neck squamous cell carcinoma 1e - Merkel cell carcinoma 1f - Melanoma 1g - Renal cell carcinoma 1h - Gastric cancer 1i - Cervical cancer 1j - Hepatocellular carcinoma 1k - Microsatellite instability-high or mismatch repair deficient solid tumor cancer or colorectal cancer
Cohort 2OTHERPatients with NSCLC whose tumors have high PD-L1 expression (TPS ≥ 50%) and who relapsed on a PD-1 checkpoint inhibitor after experiencing an initial CR or PR when they received checkpoint inhibitor as a single-agent for first-line treatment.
Cohort 3OTHERPatients with NSCLC who had an initial CR or PR but subsequently relapsed on maintenance PD-1 checkpoint inhibitor therapy when they initially received checkpoint inhibitor therapy in combination with chemotherapy as first-line treatment.
Cohort 4EXPERIMENTALPatients who are currently receiving PD-1/PD-L1 checkpoint inhibitor therapy and have disease progression after experiencing stable disease (SD) for at least 6 months during their previous treatment with PD-1/PD-L1 checkpoint inhibitor therapy.
Cohort 5EXPERIMENTALPatients that have experienced disease progression by Investigator-assessment per irRECIST while receiving treatment in Cohorts 1-4.
Cohort 6EXPERIMENTALPatients who have progressed after an initial response (CR or PR) to a PD-1/PD-L1 checkpoint inhibitor but now exhibit acquired resistance. They have received exactly one line of anti-PD-1 or anti-PD-L1 therapy (either pembrolizumab or nivolumab) for advanced NSCLC (Stage IV or recurrent).

Interventions

NameTypeDescription
N-803 + PembrolizumabDRUGPatients will receive 200 mg pembrolizumab as an intravenous infusion over 30 minutes every three weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks.
N-803 + NivolumabDRUGPatients will receive 240 mg nivolumab as an intravenous infusion over 30 minutes every two weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks.
N-803 + AtezolizumabDRUGPatients will receive 1200 mg atezolizumab as an intravenous infusion over 60 minutes every 3 weeks; if the first infusion is tolerated, subsequent infusions may be given over 30 minutes. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks.
N-803 + AvelumabDRUGPatients will receive 800 mg avelumab as an intravenous infusion over 60 minutes every 2 weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks.
N-803 + DurvalumabDRUGPatients will receive 10 mg/kg durvalumab as an intravenous infusion over 60 minutes every 2 weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks.
N-803 + Pembrolizumab + PD-L1 t-haNKDRUGPatients will receive 200 mg pembrolizumab as an intravenous infusion over 30 minutes every three weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks. Patients will receive PD-L1 t-haNK administered IV over 30 minutes at \~2 x 10\^9 cells/dose weekly
N-803 + Nivolumab + PD-L1 t-haNKDRUGPatients will receive 240 mg nivolumab as an intravenous infusion over 30 minutes every two weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks. Patients will receive PD-L1 t-haNK administered IV over 30 minutes at \~2 x 10\^9 cells/dose weekly
N-803 + Atezolizumab + PD-L1 t-haNKDRUGPatients will receive 1200 mg atezolizumab as an intravenous infusion over 60 minutes every 3 weeks; if the first infusion is tolerated, subsequent infusions may be given over 30 minutes. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks. Patients will receive PD-L1 t-haNK administered IV over 30 minutes at \~2 x 10\^9 cells/dose weekly
N-803 + Avelumab + PD-L1 t-haNKDRUGPatients will receive 800 mg avelumab as an intravenous infusion over 60 minutes every 2 weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks. Patients will receive PD-L1 t-haNK administered IV over 30 minutes at \~2 x 10\^9 cells/dose weekly
N-803 + Durvalumab + PD-L1 t-haNKDRUGPatients will receive 10 mg/kg durvalumab as an intravenous infusion over 60 minutes every 2 weeks. Patients will receive 15 µg/kg N-803 administered by subcutaneous injection every three weeks. Patients will receive PD-L1 t-haNK administered IV over 30 minutes at \~2 x 10\^9 cells/dose weekly
N-803 + Docetaxel + PembrolizumabDRUGThe study employs a 6-week cycle combination of: N-803 (1.2 mg flat dose SC), docetaxel (75 mg/m² IV - first 2 cycles only), and pembrolizumab (200 mg IV).
N-803 + Docetaxel + NivolumabDRUGThe study employs a 6-week cycle combination of:N-803 (1.2 mg flat dose SC), docetaxel (75 mg/m² IV - first 2 cycles only), and nivolumab (240 mg IV). Nivolumab dosing may be increased to 480mg every four weeks as per the investigator's discretion.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites35

INCLUSION CRITERIA (Cohort 6 only) 1. Age ≥ 18 years old. 2. Able to understand and provide a signed informed consent that fulfills the relevant IRB/IEC guidelines. 3. Pathologically confirmed stage IV NSCLC disease. 4. Have received exactly 1 anti-PD-1 or anti-PD-L1 therapy (either pembrolizumab o...

Countries:United States
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Competitive Landscape -Non-Small Cell Lung Cancer 389 trials

Frequently asked questions about N-803+ Pembrolizumab

What is N-803 used for?

N-803 is an investigational small molecule being studied for use in several cancers, including NSCLC Stage IV, pancreatic cancer, B-cell Non-Hodgkin Lymphoma, and platinum-resistant ovarian cancer. It is also being evaluated in healthy subjects. The drug is in clinical development and has not been approved by the FDA.

What does N-803 target?

N-803 targets IL-15, a cytokine involved in immune system regulation. By interacting with this target, the drug is designed to modulate immune responses, which may be relevant in cancer treatment. It is being studied in combination with other therapies for various malignancies.

Who makes N-803?

N-803 is developed by ImmunityBio, Inc., a biopharmaceutical company. The company is conducting clinical trials to evaluate the drug's safety and efficacy in multiple cancer indications. ImmunityBio is publicly traded under the ticker symbol IBRX.

What phase is N-803 in?

N-803 is in Phase 1 clinical development, though some trials are in Phase 2 and Phase 3. The drug is investigational and not yet approved. Clinical trials are ongoing or recently completed across various cancer types, including non-small cell lung cancer and pancreatic cancer.

What clinical trials is N-803 in?

N-803 is being studied in several trials, including NCT03228667 for multiple cancers, NCT04390399 for pancreatic cancer, NCT06745908 for NSCLC Stage IV, and NCT07049432 for B-cell Non-Hodgkin Lymphoma. These trials are at different phases and enrollment stages.

Is N-803 the same as N803?

Yes, N-803 is also known as N803. It is sometimes referred to with additional descriptors, such as N-803 and BCG, N-803 plus Pembrolizumab, or N-803 (IL-15 Superagonist). These names all refer to the same investigational drug.