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NCT05989828 · University of Southern California

A2-ESO-1 TCR-Engineered T Cells for Relapsed/Refractory Advanced or Metastatic NY-ESO-1 Overexpression Positive Triple Negative Breast Cancer

What this study is about

This phase Ib trial tests the safety, side effects and best dose of anti-HLA-A2/NY-ESO-1 T-cell receptor (TCR)-transduced autologous T lymphocytes (A2-ESO-1 TCR-T cells) in treating patients with NY-ESO-1 overexpression positive triple negative breast cancer (TNBC) that has come back after a period of improvement (relapsed/recurrent) or that does not respond to treatment (refractory), and that may have spread from where it first started (primary site) to nearby tissue, lymph nodes (advanced) or to other places in the body (metastatic). NY-ESO-1 is an antigen found on the surface of many different types of tumor cells including TNBC. Antigens make it possible for immune cells to recognize and kill germ cells that invade the body, however, it is more difficult for immune cells to recognize antigens on tumor cells. T cells are a special type of immune cell in the blood. These T cells may be trained to recognize the NY-ESO-1 antigen on tumor cells, allowing the T cells to attack and kill those tumor cells. The A2-ESO-1 TCR-T cells are T cells that have been removed from the patient's blood through a process called leukapheresis and then changed in the laboratory to recognize NY-ESO-1 on tumor cells. When given back to the patient, these A2-ESO-1 TCR-T cells find and attack tumor cells that express NY-ESO-1. Chemotherapy drugs, such as cyclophosphamide and fludarabine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. They are given before the T cells to support optimum activity of the A2-ESO-1 TCR-T cells. IL-2 (aldesleukin) is in a class of drugs known as cytokines. It is a man-made version of a naturally occurring protein that stimulates the body to produce other chemicals which increase the body's ability to fight cancer. A2-ESO-1 TCR-T cells may kill more tumor cells in patients with recurrent or refractory advanced or metastatic TNBC that overexpresses NY-ESO-1.

View original scientific description

This phase Ib trial tests the safety, side effects and best dose of anti-HLA-A2/NY-ESO-1 T-cell receptor (TCR)-transduced autologous T lymphocytes (A2-ESO-1 TCR-T cells) in treating patients with NY-ESO-1 overexpression positive triple negative breast cancer (TNBC) that has come back after a period of improvement (relapsed/recurrent) or that does not respond to treatment (refractory), and that may have spread from where it first started (primary site) to nearby tissue, lymph nodes (advanced) or to other places in the body (metastatic). NY-ESO-1 is an antigen found on the surface of many different types of tumor cells including TNBC. Antigens make it possible for immune cells to recognize and kill germ cells that invade the body, however, it is more difficult for immune cells to recognize antigens on tumor cells. T cells are a special type of immune cell in the blood. These T cells may be trained to recognize the NY-ESO-1 antigen on tumor cells, allowing the T cells to attack and kill those tumor cells. The A2-ESO-1 TCR-T cells are T cells that have been removed from the patient's blood through a process called leukapheresis and then changed in the laboratory to recognize NY-ESO-1 on tumor cells. When given back to the patient, these A2-ESO-1 TCR-T cells find and attack tumor cells that express NY-ESO-1. Chemotherapy drugs, such as cyclophosphamide and fludarabine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. They are given before the T cells to support optimum activity of the A2-ESO-1 TCR-T cells. IL-2 (aldesleukin) is in a class of drugs known as cytokines. It is a man-made version of a naturally occurring protein that stimulates the body to produce other chemicals which increase the body's ability to fight cancer. A2-ESO-1 TCR-T cells may kill more tumor cells in patients with recurrent or refractory advanced or metastatic TNBC that overexpresses NY-ESO-1.

Interventions

BIOLOGICAL

Aldesleukin

Given IV

BIOLOGICAL

Anti-HLA-A2/NY-ESO-1 TCR-transduced Autologous T Lymphocytes

Given IV

PROCEDURE

Biopsy

Undergo biopsy of breast tumor

PROCEDURE

Biospecimen Collection

Undergo blood sample collection

PROCEDURE

Computed Tomography

Undergo CT scan

DRUG

Cyclophosphamide

Given IV

PROCEDURE

Echocardiography

Undergo ECHO

DRUG

Fludarabine

Given IV

PROCEDURE

Leukapheresis

Undergo leukapheresis

PROCEDURE

Magnetic Resonance Imaging

Undergo breast MRI

PROCEDURE

Mammogram

Undergo mammogram

PROCEDURE

Multigated Acquisition Scan

Undergo MUGA scan

PROCEDURE

Ultrasound Imaging

Undergo ultrasound of breast

Primary outcome measures

Maximum tolerated dose (MTD) of anti-HLA-A2/NY-ESO-1 T-cell receptor (TCR)-transduced autologous T lymphocytes (A2-ESO-1 TCR-engineered T cells)

Time frame: Up to 6 weeks after A2-ESO-1 TCR-engineered T cell infusion

Will employ the Bayesian optimal interval to find the MTD.

Incidence of dose-limiting toxicities

Time frame: Up to 6 weeks after A2 ESO-1 TCR-engineered T cell infusion

Defined as any treatment-related death or any greater than or equal to grade 3 adverse event (AE) as assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0.

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

  • Female aged \>= 18 years
  • Histologically confirmed advanced or metastatic TNBC that have relapsed on or are refractory to 2 or more lines of standard-of-care therapy. TNBC is defined as estrogen receptor (ER) and progesterone receptor negative (\< 10% immunohistochemistry \[IHC\] staining) and HER2 negative (IHC 1+ or 0 AND/OR in situ hybridization negative based on:
  • Single-probe average HER2 copy number \< 4.0 signals/cell
  • Dual-probe HER2/CEP17 ratio \< 2.0 with an average HER2 copy number \< 4.0 signals/cell)
  • HLA-A2+ and tumoral overexpression of NY-ESO-1 (2 to 3+ IHC staining in \> 50% of cells)
  • Have measurable disease based on RECIST 1.1
  • Life expectancy \>= 6 months
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
  • Hemoglobin \>= 9.0 g/dL (transfusions permitted)
  • Absolute neutrophil count (ANC) \>= 1500/mm\^3
  • Platelet count \>= 100,000/mm\^3
  • Creatinine (Cr) \< 2 x upper limit of normal (ULN), and Cr clearance (CrCl) \>= 50 mL/min by Cockcroft and Gault
  • Alanine transaminase (ALT) and aspartate transaminase (AST) \< 2 x ULN (Patients with liver metastases whose ALT/AST are \< 5 x ULN are eligible for enrollment)
  • Bilirubin \< 2 x ULN
  • Lymphocyte count \>= 500/uL
  • Cardiac left ventricular ejection fraction (LVEF) \>= 50%
  • Negative serum pregnancy (human chorionic gonadotropin \[beta-hCG\]) test within 7 days of leukapheresis for women of childbearing potential (WOCBP). WOCBP must be willing to use a highly effective method of contraception for the course of the study through 90 days after A2-ESO-1 TCR-engineered T cell infusion
  • Willing and able to provide written informed consent for the study
  • Willing to provide biopsy tissues and blood samples as required by the study

Exclusion criteria

  • Radiation therapy, chemotherapy, or non-cytotoxic investigational agent within 2 weeks of leukapheresis
  • Received cyclophosphamide within the past 4 months
  • Evidence of New York Heart Association class III or greater cardiac disease
  • History of myocardial infarction, stroke, ventricular arrhythmia, or symptomatic conduction abnormality within the past 12 months
  • History of congenital QT prolongation
  • Absolute QT interval of \> 470 msec in the presence of \> 4.0 mEq/L potassium and \> 1.8 mg/dL magnesium
  • Brain or leptomeningeal metastases
  • Females who are pregnant or breastfeeding
  • Hypersensitivity or intolerance to cyclophosphamide, fludarabine, IL-2, or their components
  • History of clinically significant gastrointestinal bleeding, gastric or intestinal ulceration, or perforation within 6 months of enrollment.
  • Any severe and/or uncontrolled medical conditions or other conditions that could affect participation in the study, such as severely impaired lung function, any active (acute or chronic) or uncontrolled infection/disorders, and non-malignant medical illnesses that are uncontrolled or whose control may be jeopardized by the study treatment
  • Current use of medications that interact with or compromise the immune system such as steroid doses \> 10 mg/day prednisone or equivalent daily within 2 weeks before leukapheresis
  • History of immunodeficiency disease or autoimmune disease, with exceptions such as Hashimoto's thyroiditis / hypothyroidism, or controlled Type 1 diabetes
  • Have any active and uncontrolled infection.
  • Active hepatitis B (as defined as positive hepBsAntigen or detectable hepatitis B DNA) or hepatitis C infection. Patients who are hepatitis B surface Antigen negative and have a negative hep B DNA are allowed. If hepatitis C antibody test is positive, then patients must be tested for the presence of antigen by RT-PCR and be HCV RNA negative. Patients with laboratory evidence of cleared hepatitis B or C infection may enroll. Patients with no prior history of hepatitis B infection who have been vaccinated against hepatitis B and who have a positive antibody against hepatitis B surface antigen as the only evidence of prior exposure may enroll. Patients with a history of hepatitis C infection may be eligible if they have completed antiviral treatment and show no detectable HCV RNA for 6 months prior to enrollment.
  • Human immunodeficiency virus (HIV) infection or seropositive for HIV antigens
  • Concurrent use of any complementary or alternative medicines
  • Unwilling or unable to comply with the study protocol
  • Prior major surgery that requires general anesthesia must be completed at least 4 weeks before leukapheresis and surgery that requires local anesthesia (except for study tissue sample collection) must be completed at least 2 weeks before leukapheresis and surgery that requires local anesthesia (except for study tissue sample collection) must be completed at least 2 weeks before leukapheresis

Where

  • Los Angeles, California

Collaborators

National Cancer Institute (NCI)

Related conditions & keywords

Triple Negative Breast Cancer

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 May 19, 2026 · Source of record for eligibility and locations

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A short prescreen based on this study's listed criteria. A coordinator confirms eligibility — this is not a medical assessment.

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Study locations

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RECRUITING

Los Angeles

California

Location available

Express your interest

Share your contact details and a study coordinator can follow up about screening.

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What participation can include

  • Study-related care provided by the research team
  • Close monitoring by medical professionals
  • Possible compensation for time and travel*
  • The option to withdraw at any time
  • Contributing to medical research that may help future patients

*Compensation varies by study. Confirm details with coordinator.

Typical next steps

  1. 1.Submit this form
  2. 2.Phone screening
  3. 3.In-person assessment if eligible
  4. 4.Begin participation

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Looking for Triple Negative Breast Cancer Treatment in Los Angeles?

Join others in California exploring innovative treatment options through clinical research

Triple Negative Breast Cancer Treatment Options in Los Angeles, California

If you're searching for Triple Negative Breast Cancer treatment in Los Angeles, participating in a clinical research study may provide access to innovative approaches under expert medical supervision. This study is actively recruiting participants in Los Angeles and surrounding areas.

Clinical trials offer participants the opportunity to receive cutting-edge treatments while contributing to medical research that may help future patients with Triple Negative Breast Cancer. All study-related care is provided at no cost to participants.

Local Sites
1 locations in California
Now Enrolling
Up to 20 participants
Quick Start
Screening available now

Why Consider a Clinical Trial for Triple Negative Breast Cancer?

Potential Benefits

  • Access to new treatment approaches before public availability
  • Close monitoring by experienced medical professionals
  • Study-related care provided at no cost
  • Contribute to medical research for Triple Negative Breast Cancer

What to Expect

  • Initial screening to determine eligibility
  • Regular check-ups and monitoring visits
  • Possible compensation for time and travel
  • You can withdraw at any time

Frequently Asked Questions About This Triple Negative Breast Cancer Study

Important Clinical Trial Information

This information is provided for educational purposes and does not constitute medical advice. Clinical trial participation involves potential risks and benefits. Eligibility requirements apply and will be assessed during the screening process.

Study identifier: NCT05989828. For complete study details, visit ClinicalTrials.gov. Always consult with your healthcare provider before making decisions about your medical care or participating in clinical research.