Open Actively Recruiting

A Study of NT-175 in Adult Subjects With Unresectable, Advanced, and/or Metastatic Solid Tumors That Are Positive for HLA-A*02:01 and the TP53 R175H Mutation


Brief Summary

Phase I Study of NT-175, an autologous T cell therapy product genetically engineered to express an HLA-A*02:01-restricted T cell receptor (TCR), targeting TP53 R175H mutant solid tumors.

Primary Purpose
Study Type
Phase 1


Healthy Volunteers
Minimum Age
18 Years
Maximum Age

Key Inclusion Criteria

  • Subjects must be at least 18 years of age, at the time of signing the informed consent.
  • Subjects must be capable of giving signed informed consent.
  • Subject must be diagnosed with one of the histologies below:
    • NSCLC
    • Colorectal adenocarcinoma
    • HNSCC
    • Pancreatic adenocarcinoma
    • Breast cancer
    • Any other solid tumor
  • Tumors must harbor a TP53 R175H variant mutation and subject must be HLA-A*02:01 positive (at least 1 allele) as confirmed by an CLIA-accredited laboratory-based test.
  • Subject has advanced solid cancer, defined as unresectable, advanced, and/or metastatic disease (Stage III or IV) after at least 1 line of approved systemic standard of care (SOC) treatment regimen and for which there are no available curative treatment options.
  • Subject has at least 1 measurable lesion per computed tomography (CT) scan or magnetic resonance imaging (MRI).
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 at the time of enrollment
  • Adequate hematological, renal, hepatic, pulmonary, and cardiac function
  • Per Investigator judgement, subject is likely to complete study visits and/or procedures per the protocol and comply with study requirements for study participation

Key Exclusion Criteria

  • Any another primary malignancy within the 3 years prior to enrollment (except for non-melanoma skin cancer, carcinoma in situ (eg, cervix, bladder, breast) or low-grade prostate cancer
  • Known, active primary central nervous system (CNS) malignancy
  • History of prior adoptive cell and gene therapy, allogeneic stem cell transplant or solid organ transplantation.
  • History of stroke or transient ischemic attack within the 12 months prior to enrollment.
  • History of clinically significant cardiac disease within the 6 months prior to enrollment or heart failure at any time prior to enrollment.
  • Systemic therapy within at least 2 weeks or 3 half-lives, whichever is shorter, prior to enrollment.
  • History of severe immediate hypersensitivity reaction to cyclophosphamide, fludarabine, or rIL-2; or known sensitivity or allergy to methotrexate, gentamicin, or other aminoglycosides.
  • Any form of primary immunodeficiency.
  • Live vaccine ≤ 4 weeks prior to enrollment or plans to have a live vaccine prior to planned lymphodepleting chemotherapy and/or NT-175 treatment.
  • Active immune-mediated disease requiring systemic steroids or other immunosuppressive treatment (except if related to prior checkpoint inhibitor therapy)
  • Female of childbearing potential who is lactating or breast feeding at the time of enrollment.
  • Known to have Li-Fraumeni syndrome or is known to have relatives who are diagnosed with Li-Fraumeni syndrome.

Join this Trial

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Study Stats
Protocol No.
Breast Cancer
Colorectal Cancer
Head and Neck Cancer
Lung Cancer
Pancreatic Cancer
Chris Hannigan
  • UCLA Westwood
For Providers
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