A Study of NT-175 in Adult Participants With Advanced Malignancies That Are Positive for HLA-A*02:01 and the TP53 R175H Mutation

August 31, 2026 updated by: AstraZeneca

An Open-label, Phase 1, Multicentre Platform Study to Evaluate the Safety and Preliminary Anti-tumour Activity of NT-175 in Human Leukocyte Antigen-A*02:01-Positive Adult Participants With Advanced Malignancies That Are Positive for the TP53 R175H Mutation

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 malignancies

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

This is a Phase 1, open-label, multicentre platform study to evaluate the safety and preliminary antitumour activity of NT-175 in HLA-A*02:01 participants with advanced malignancies that are positive for the TP53 R175H mutation.

Dose Escalation will investigate escalating doses of NT-175 in adult subjects with eligible histologies and will evaluate the safety and MTD and/or RDE/RP2D.

Cohort expansion will further evaluate the safety and preliminary anti-tumour activity at or below the MTD in disease specific histologies and determine the RP2D.

Dose Expansion will further evaluate the preliminary anti-tumour activity and safety of NT-175 at the RP2D in disease specific settings.

Study Type

Interventional

Enrollment (Estimated)

45

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • United States
    • Arizona
      • Gilbert, Arizona, United States, 85234
        • Recruiting
        • Research Site
    • California
      • Duarte, California, United States, 91010
        • Recruiting
        • Research Site
      • Duarte, California, United States, 91010
        • Not yet recruiting
        • Research Site
      • Los Angeles, California, United States, 90095
        • Not yet recruiting
        • Research Site
      • Newport Beach, California, United States, 92663
        • Recruiting
        • Research Site
      • Santa Monica, California, United States, 90404
        • Recruiting
        • Research Site
    • Florida
      • Jacksonville, Florida, United States, 32224
        • Recruiting
        • Research Site
      • Miami, Florida, United States, 33136
        • Withdrawn
        • Research Site
      • Tampa, Florida, United States, 33612
        • Withdrawn
        • Research Site
    • Massachusetts
      • Boston, Massachusetts, United States, 02215
        • Not yet recruiting
        • Research Site
      • Boston, Massachusetts, United States, 02115
        • Recruiting
        • Research Site
    • New Jersey
      • New Brunswick, New Jersey, United States, 08901
        • Recruiting
        • Research Site
    • New York
      • New York, New York, United States, 10065
        • Recruiting
        • Research Site
      • New York, New York, United States, 10065
        • Not yet recruiting
        • Research Site
    • North Carolina
      • Charlotte, North Carolina, United States, 28204
        • Withdrawn
        • Research Site
      • Winston-Salem, North Carolina, United States, 27103
        • Withdrawn
        • Research Site
    • Oregon
      • Portland, Oregon, United States, 97213
        • Recruiting
        • Research Site
    • Pennsylvania
      • Pittsburgh, Pennsylvania, United States, 15232
        • Recruiting
        • Research Site
    • Tennessee
      • Nashville, Tennessee, United States, 37203
        • Recruiting
        • Research Site
    • Texas
      • Houston, Texas, United States, 77030
        • Recruiting
        • Research Site
      • Houston, Texas, United States, 77030
        • Not yet recruiting
        • Research Site
      • Round Rock, Texas, United States, 78665
        • Recruiting
        • Research Site
    • Wisconsin
      • Milwaukee, Wisconsin, United States, 53226
        • Recruiting
        • Research Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Key Inclusion Criteria (Module 1)

  • Subjects must be at least 18 years of age

  • Subject must be diagnosed with one of the histologies below:

    • NSCLC
    • Colorectal adenocarcinoma
    • HNSCC
    • 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)
  • 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
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1
  • Adequate hematological, renal, hepatic, pulmonary, and cardiac function

Key Exclusion Criteria (Module 1)

  • Any another primary malignancy within the 3 years prior to enrollment
  • 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 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.
  • Any form of primary immunodeficiency.
  • Known to have Li-Fraumeni syndrome or is known to have relatives who are diagnosed with Li-Fraumeni syndrome.

Key Inclusion Criteria (Module 2 - hematological malignancies)

  • At least 18 years of age
  • Diagnosis of AML or MDS that allows for efficacy assessments
  • Confirmation of TP53 R175H variant mutation in cancer cells
  • Subject must be HLA-A*02:01 positive (at least 1 allele)
  • ECOG performance status of 0 to 1

Key Exclusion Criteria (Module 2 - hematological malignancy)

  • Acute promyelocytic leukaemia or isolated extramedullary disease
  • Another primary malignancy within 2 years (with exceptions)
  • HSCT within 100 days or immunosuppression for GvHD within 4 weeks
  • History of CNS or other extramedullary leukaemic involvement unless a lumbar puncture is negative for leukemic cells
  • Prior stroke, ischemic attack, significant cardiac disease, heart failure
  • Prior adoptive modified cell therapy
  • Known to have Li-Fraumeni syndrome or is known to have relatives who are diagnosed with Li-Fraumeni syndrome.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: NT-175 for advanced malignancies
TCR T cell therapy product
Biological: NT-175
  • Pre-conditioning by non-myeloablative chemotherapy with fludarabine and cyclophosphamide
  • Single infusion Autologous, engineered T Cells targeting TP53 R175H
  • Post-infusion recombinant interleukin-2 (rIL-2)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Module 1, Part 1: Safety of NT-175 in participants with unresectable, advanced, and/or metastatic solid tumours
Time Frame: 28 days after infusion
Incidence of dose-limiting toxicities (DLTs) after the infusion of NT-175
28 days after infusion
Module 1, Part 1: Safety of NT-175 in participants with unresectable, advanced, and/or metastatic solid tumours
Time Frame: Up to 24 months post-infusion
Incidence of Treatment Emergent Adverse Events (TEAE) Serious Adverse Events (SAE)
Up to 24 months post-infusion
Module 1, Part 2: Preliminary anti-tumour activity of NT-175 in participants with unresectable, advanced, and/or metastatic solid tumours
Time Frame: Up to 24 months after infusion

Per RECIST v1.1 determined by Investigator assessment:

  • Objective Response Rate (ORR)
  • Best Overall Response (BOR)
  • Duration of Response (DOR)
  • Clinical Benefit Rate (CBR)
  • Time to Response (TTR)
  • Progression-free survival (PFS)
  • Overall Survival (OS)
Up to 24 months after infusion
Module 2: Safety of NT-175 in participants with haematological malignancies
Time Frame: Up to 28 days after infusion
- Incidence of dose-limiting toxicities (DLTs) after the infusion of NT-175
Up to 28 days after infusion
Module 2: Safety of NT-175 in participants with haematological malignancies
Time Frame: Up to 24 months after infusion
  • Incidence of Treatment Emergent Adverse Events (TEAE)
  • Serious Adverse Events (SAE)
Up to 24 months after infusion

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Module 1, Part 1: Preliminary anti-tumor activity of NT-175 in participants with unresectable, advanced, and/or metastatic solid tumours
Time Frame: Up to 24 months after infusion

Per RECIST v1.1 determined by Investigator assessment:

  • Objective Response Rate (ORR)
  • Best Overall Response (BOR)
  • Duration of Response (DOR)
  • Clinical Benefit Rate (CBR)
  • Time to Response (TTR)
  • Progression-free survival (PFS)
  • Overall Survival (OS)
Up to 24 months after infusion
Module 2: Evaluate preliminary anti-tumour activity in participants with AML or MDS
Time Frame: Up to 24 months after infusion

Per ELN 2022 criteria for AML and per IWG 2023 criteria for MDS by Investigator assessment:

  • Objective Response Rate (ORR)
  • Time to Response (TTR)
  • Duration of Response (DOR)
  • Event-free survival (EFS)

By Investigator assessment:

  • Transfusion Independence (TI)
  • Overall Survival (OS)
  • Complete Response (CR) + Complete response with partial haematological recover (CRh)
  • Complete Response with limited count recovery (CRL) (CRuni + CRbi) in MDS
  • MDS time to Progression to AML
  • Proportion of participants with subsequent Haematopoietic Stem Cell Transplantation (HSCT)
Up to 24 months after infusion

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

AstraZeneca

Investigators

  • Study Director: AstraZeneca, AstraZeneca

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 12, 2023

Primary Completion (Estimated)

July 31, 2029

Study Completion (Estimated)

July 31, 2029

Study Registration Dates

First Submitted

May 17, 2023

First Submitted That Met QC Criteria

May 17, 2023

First Posted (Actual)

May 26, 2023

Study Record Updates

Last Update Posted (Actual)

September 1, 2026

Last Update Submitted That Met QC Criteria

August 31, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NT-175-201
  • D8690C00001 (Other Identifier: AstraZeneca)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal Vivli.org. All requests will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

IPD Sharing Time Frame

AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA PhRMA Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

IPD Sharing Access Criteria

When a request has been approved AstraZeneca will provide access to the anonymized individual patient-level data via secure research environment Vivli.org. Signed Data Usage Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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