A Phase 1/2 interventional study of Cyclophosphamide and Fludarabine in Pancreatic Cancer, Gastric Cancer and Gastrointestinal Cancer, sponsored by National Cancer Institute (NCI). Recruiting at 1 site in United States. Open to participants aged 18 Years to 72 Years. Per ClinicalTrials.gov, last updated 2026-08-24.
Sponsored by National Cancer Institute (NCI) · Phase 1/2, Interventional, and Treatment
Background:
A new cancer therapy involves taking white blood cells from a person, growing them in the lab, genetically modifying them, then giving them back to the person. This therapy is called gene transfer using anti-KRAS G12V mTCR cells.
Objective:
To see if anti-KRAS G12 V mTCR cells are safe and can shrink tumors.
Eligibility:
Adults at least 18 years old with cancer that has the KRAS G12V molecule on the surface of tumors.
Design:
In another protocol, participants will:
Be screened
Have cells harvested and grown
Have leukapheresis
In this protocol, participants will have the procedures below.
Participants will be admitted to the hospital.
Over 5 days, participants will get 2 chemotherapy medicines as an infusion via catheter in the upper chest.
A few days later, participants will get the anti-KRAS G12V mTCR cells via catheter.
For up to 3 days, participants will get a drug to make the cells active.
A day after getting the cells, participants will get a drug to increase their white blood cell count. This will be a shot or injection under the skin.
Participants will recover in the hospital for 1-2 weeks. They will have lab and blood tests.
Participants will take an antibiotic for at least 6 months.
Participants will have visits every few months for 2 years, and then as determined by their doctor.
Visits will be 1-2 days. They will include lab tests, imaging studies, and physical exam. Some visits may include leukapheresis or blood drawn.
Participants will have blood collected over several years.
Background:
Objectives:
Primary objectives:
Eligibility:
Patients must be/have:
Patients may not have:
-Allergies or hypersensitivities to high-dose aldesleukin, cyclophosphamide or fludarabine.
Design:
cohorts for the Phase II component: Cohort 2a, patients with RAS G12V pancreatic
cancer, and Cohort 2b, patients with RAS G12V non-pancreatic cancer.
-A total of up to 110 patients may be required; approximately 24 patients in the phase I portion of the study and 86 (41, plus an allowance of up to 2 non-evaluable per phase II cohort) patients in the phase II portion of the study.
Patients must have:
previously received standard systemic therapy for their advanced cancer and have been either non-responders or have recurred, specifically:
OR
with surgically resected brain metastases are eligible.
NOTE: Certain malignancies may secrete hormones that produce false positive pregnancy tests. Serial blood testing (e.g. HCG measurements) and/ or ultrasound may be performed for clarification.
Serology
Hematology
Chemistry
Note: Patients may have undergone minor surgical procedures or limited field radiotherapy within the four weeks prior to enrollment, as long as related major organ toxicities have recovered to less than or equal to grade 1.
EXCLUSION CRITERIA:
Non-myeloablative, lymphodepleting preparative regimen of cyclophosphamide and fludarabine + escalating doses of anti-KRAS G12V mTCR PBL + high-dose aldesleukin
Drug: Cyclophosphamide · Drug: Fludarabine · Biological: Anti-KRAS G12V mTCR PBL · Drug: Aldesleukin
Non-myeloablative, lymphodepleting preparative regimen of cyclophosphamide and fludarabine + MTD of anti-KRAS G12V mTCR PBL + high-dose aldesleukin
Drug: Cyclophosphamide · Drug: Fludarabine · Biological: Anti-KRAS G12V mTCR PBL · Drug: Aldesleukin
Days -7 and -6: Cyclophosphamide 60 mg/kg/day x 2 days IV in 250 mL D5W infused simultaneously with mesna 15 mg/kg/day over 1 hour x 2 days.
Days -7 to -3: Fludarabine 25 mg/m2/day IVPB daily over 30 minutes for 5 days.
Day 0: Cells will be infused intravenously on the Patient Care Unit over 20-30 minutes (2-4 days after the last dose of fludarabine).
Aldesleukin 720,000 IU/kg IV (based on total body weight) over 15 minutes approximately every 8 hours beginning within 24 hours of cell infusion and continuing for up to 3 days (maximum 9 doses).
Response rate
Percentage of patients who have a clinical response (PR+CR) to treatment (objective tumor regression)
Time frame: 6 weeks and 12 weeks following administration of the cell product, then every 3 months x3, then every 6 months x 2 years, then per PI discretion
Frequency and severity of treatment-related adverse events
Grade and type of toxicity per dose level; fraction of patients who experience a DLT at a given dose level, and number and grade of each type of DLT
Time frame: From time of cell infusion to two weeks after cell infusion
Plan to share: Yes — All IPD recorded in the medical record will be shared with intramural investigators upon request.
Supporting information: Study protocol, Sap, Icf
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National Cancer Institute (NCI)