Clinical trial Recruiting at 7 sites Phase 1 Interventional Ages 18 and up

MSK-TCR5 in adults with advanced solid tumors that have KRAS/HRAS/NRAS G12D

Official title: FORTRAS: Phase I, Investigator Initiated, Dose-escalation Clinical Trial Evaluating a CD8 Alpha/Beta Armored RAS G12D/HLA-A*11:01-specific T-cell Receptor Therapy (MSK-TCR5) in Patients With Advanced Solid Tumors

Run by Memorial Sloan Kettering Cancer Center · NCT07638371 · Data updated 2026-11-12

This study tests MSK-TCR5 to see if it is safe for adults with advanced solid tumors carrying a KRAS, HRAS, or NRAS G12D mutation.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment16 (estimated)
SponsorMemorial Sloan Kettering Cancer Center
Academic / other
Drugs / interventionscyclophosphamide, fludarabine, prednisone
Locations7 sites (Basking Ridge, New Jersey and 6 other locations)
StatusRecruiting
StartedJune 9, 2026
Main results expectedJune 9, 2030
Study endsJune 9, 2030
Registry record updatedNovember 2, 2026
Trial IDNCT07638371 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (≥18 years) with histologically confirmed advanced or metastatic unresectable solid tumors harboring a KRAS/HRAS/NRAS G12D mutation and positive HLA-A*11:01, measurable disease, good performance status, and prior progression after standard therapy.

Probably not a fit

Patients whose tumors do not express the target mutation or who cannot tolerate the treatment may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a Phase 1 interventional trial evaluating the safety of MSK-TCR5 in adults with unresectable or metastatic solid tumors that harbor KRAS, HRAS, or NRAS G12D mutations. Eligible participants must have measurable disease, an ECOG score of 0 or 1, and have progressed after at least one standard therapy or have no curative options remaining. The study involves selecting patients who meet genetic and performance criteria, followed by administration of MSK-TCR5 and safety monitoring. Primary goals focus on safety and tolerability, with exploratory assessments of preliminary signals of clinical activity. The trial is conducted at Memorial Sloan Kettering sites in New Jersey with limited protocol activities.

Why it matters

Potential benefit: If successful, participants may experience disease stabilization or clinical benefit from MSK-TCR5, though benefits are not guaranteed in this early phase.

How similar studies have gone: Prior immune-cell therapies in similar genetic contexts have shown safety and early activity signals in early-phase trials, but this exact approach is novel for this mutation-HLA combination.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

Part A: Prior to cell collection all of the following inclusion criteria must be met:

* Age ≥18 years.
* Histologically confirmed advanced or metastatic, unresectable solid tumor
* Positive for RAS G12D mutation and HLA-A\*11:01 allele
* Subject has advanced solid cancer, defined as unresectable, advanced, and/or metastatic disease after at least 1 line of systemic standard of care (SOC) treatment regimen and for which there are no available curative treatment options. Subjects with stable disease (SD), or that present lack of clinical benefit from previous therapy (including treatment suspension due to toxicity) may be considered eligible for enrollment. :

Part B: Prior to treatment with MSK-TCR5 all of the following inclusion criteria must be met:

* Measurable disease per RECIST version 1.1. Note: a previously irradiated or locoregionally treated lesion can be considered a target lesion if it progressed post-treatment.
* ECOG performance status of 0 or 1
* Adequate organ and bone marrow function based on the following laboratory values:

  1. ANC ≥1000/mm3 without granulocyte colony-stimulating factor support (filgrastim within 7 days or peg-filgrastim within 14 days of screening)
  2. Platelets ≥75,000/mm3 without transfusion within the preceding 7 days of screening.
  3. Hemoglobin ≥8.0 g/dL (≥80 g/L); blood transfusion permitted within 7 days of screening.
  4. AST, ALT, and ALP ≤ 3x ULN, or ≤ 5x ULN if liver or bone metastases present.
  5. Total bilirubin ≤ 1.5x ULN or ≤ 3x ULN in the presence of documented Gilbert's Syndrome
  6. CrCl ≥50 mL/min by Cockcroft-Gualt equation

Exclusion Criteria:

Part A: Participant Exclusion Criteria prior to cell collection

* Previous allogeneic stem cell transplantation or prior organ transplantation
* History of primary immunodeficiency, autoimmune, or inflammatory disease including inflammatory bowel disease, systemic lupus erythematosus, rheumatoid arthritis, myasthenia gravis, or Grave's disease that in the past year has required systemic treatment with corticosteroids \> 10mg/day of prednisone or equivalent doses of other corticosteroids or immunosuppressive drugs. Note: Replacement therapy (e.g. thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal/pituitary insufficiency is not considered a form of systemic treatment and allowed)
* Primary brain tumor
* Untreated central nervous system (CNS) metastatic disease, leptomeningeal disease, or cord compression. Patients previously treated for CNS metastases that are radiographically and neurologically stable and off steroids for at least 2 weeks prior to enrollment are eligible.
* Surgery or catheter-based interventions such as transarterial chemoembolization or percutaneous coronary intervention within 2 weeks.
* Uncontrolled significant intercurrent or recent illness including, but not limited to the following conditions:

  a. Significant cardiovascular abnormalities as defined by any one of the following: uncontrolled congestive heart failure or hypertension, clinically significant hypotension, symptomatic coronary artery disease, or a documented ejection fraction (EF) of \< 50% as assessed by echocardiogram or multigated acquisition scan (MUGA).
* Uncontrolled active bacterial, viral, fungal, or mycobacterial infection not responding to antibiotics, antimycotics, or antifungal agents, as well as long-term oral treatment with any of these agents.
* Subject has had radiotherapy or systemic anti-cancer therapy within at least 2 weeks or 3 half-lives, whichever is shorter.
* Pregnant or lactating women; women of childbearing age, defined as all women physiologically capable of becoming pregnant, unless they are using effective methods of contraception while receiving study treatment and for at least 12 months after all treatment is finished. Sexually active males, unless they are willing to use a condom during intercourse while receiving study treatment and for at least 12 months after all treatment is finished.
* Previously identified allergy, hypersensitivity, or known contraindication to cyclophosphamide, fludarabine, or any other agent associated with LDC or MSK-TCR5.
* Positive serologic test results for HIV.
* Acute or chronic HBV infection as assessed by serologic (HBVsAg) or PCR results, defined as HBVsAg+, HBVcAb+, HBV PCR+.
* Acute or chronic HCV infection as assessed by serologic (HCV ab) or PCR results, defined as HCV Ab+ with reflex to positive HCV PCR
* Patient/parent/LAR unable to give informed consent

Part B: Participant Exclusion Criteria prior to MSK-TCR5 infusion

* Any exclusion criterion listed in Part A.

Where it's running

  • Memorial Sloan Kettering at Basking Ridge (Limited Protocol Activities)
    Basking Ridge, New Jersey, United States
    Recruiting
  • Memorial Sloan Kettering Monmouth (Limited Protocol Activities)
    Middletown, New Jersey, United States
    Recruiting
  • Memorial Sloan Kettering Bergen (Limited Protocol Activities)
    Montvale, New Jersey, United States
    Recruiting
  • Memorial Sloan Kettering Cancer Center @ Suffolk-Commack (Limited Protocol Activities)
    Commack, New York, United States
    Recruiting
  • Memorial Sloan Kettering Westchester (Limited Protocol Activities)
    Harrison, New York, United States
    Recruiting
  • Memorial Sloan Kettering Cancer Center (All Protocol Activities)
    New York, New York, United States
    Recruiting
Show 1 more location
  • Memorial Sloan Kettering Cancer Center @ Nassau (Limited Protocol Activities)
    Uniondale, New York, United States
    Recruiting

Study contacts

  • Principal investigator: Adam Schoenfeld, MD — Memorial Sloan Kettering Cancer Center
  • Study coordinator: Adam Schoenfeld, MD
  • Email: schoenfa@mskcc.org
  • Phone: 646-608-4042

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.