NCT05877599 · AstraZeneca
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
What this study is about
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.
View original scientific description
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.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
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:
- Colorectal adenocarcinoma
- Pancreatic adenocarcinoma
- Breast cancer
- Ovarian 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) per RECIST version 1.1.
- 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.
Where
- Gilbert, Arizona
- Duarte, California
- Newport Beach, California
- Santa Monica, California
- Jacksonville, Florida
- Miami, Florida
- Tampa, Florida
- Boston, Massachusetts
- New Brunswick, New Jersey
- New York, New York
- Charlotte, North Carolina
- Winston-Salem, North Carolina
And 6 more locations — see the full list below.
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 10, 2026 · Source of record for eligibility and locations