Her2 Chimeric Antigen Receptor Expressing T Cells in Advanced Sarcoma

• Status: Active, not recruiting
• Trial end date: 2032-07-01
• Target enrollment: 0
• Participant gender: All

Summary

Patients have a type of cancer called sarcoma. Because there is no standard treatment for the patients cancer at this time or because the currently used treatments do not work fully in all cases, patients are being asked to volunteer to take part in a gene transfer research study using special immune cells. This research study combines two different ways of fighting disease: antibodies and T cells. Antibodies are proteins that protect the body from diseases caused by germs or toxic substances. They work by binding those germs or substances, which stops them from growing or exerting their toxic effects. T cells, also called T lymphocytes, are special infection-fighting blood cells that can kill other cells, including tumor cells or cells that are infected with germs. Both antibodies and T cells have been used to treat patients with cancers: they both have shown promise, but have not been strong enough to cure most patients. We have found from previous research that we can put a new gene into T cells that will make them recognize cancer cells and kill them. We now want to see if we can put a new gene in these cells that will let the T cells recognize and kill sarcoma cells. The new gene that we will put in makes an antibody specific for HER2 (Human Epidermal Growth Factor Receptor 2) that binds to sarcoma cells. In addition it contains CD28, which stimulated T cells and make them last longer. In other clinical studies using T cells, some investigators found that giving chemotherapy before the T cell infusion can improve the amount of time the T cells stay in the body and therefore the effect the T cells can have. Giving chemotherapy before a T cell infusion is called lymphodepletion since the chemotherapy is specifically chosen to decrease the number of lymphocytes in the body. Decreasing the number of patient's lymphocytes first should allow the T cells we infuse to expand and stay longer in your body, and potentially kill cancer cells more effectively. We will use fludarabine or the combination of cyclophosphamide and fludarabine as the chemotherapy agents for lymphodepletion. Cyclophosphamide and fludarabine are the chemotherapy agents most commonly used for lymphodepletion in immunotherapy clinical trials. The purpose of this study is to find the largest safe dose of chimeric T cells, and to see whether this therapy might help patients with sarcoma. Another purpose is to see if it is safe to give HER2-CD28 T cells after lymphodepleting chemotherapy.

• Phase: Phase 1
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Baylor College of Medicine
• Collaborators: Center for Cell and Gene Therapy, Baylor College of Medicine; Texas Children's Hospital; The Methodist Hospital Research Institute; The Methodist Hospital System
• Treatments: Cyclophosphamide; Fludarabine; Fludarabine phosphate; Vidarabine

Criteria

INCLUSION CRITERIA:

Procurement Eligibility:

1. Diagnosis of refractory HER2-positive sarcoma or metastatic HER2-positive osteosarcoma.

2. Karnofsky/Lansky score of 50 or greater

3. Informed consent explained to, understood by and signed by patient/guardian. Patient/guardian given copy of informed consent.

Treatment Eligibility:

1. Diagnosis of refractory HER2-positive sarcoma or metastatic HER2-positive sarcoma with disease progression after receiving at least one prior systemic therapy.

2. Recovered from acute toxic effects of all prior cytotoxic chemotherapy at least 4 weeks before entering this study. PD1/PDL1 inhibitors will be allowed to continue during treatment if medically indicated.

3. Normal ECHO (Left ventricular ejection fraction (LVEF) has to be within normal, institutional limits)

4. Life expectancy 6 weeks or greater

5. Karnofsky/Lansky score of 50 or greater

6. Bilirubin 3x or less, AST 3x or less, Serum creatinine 2x upper limit of normal or less, Hgb 7.0 g/dl or greater, WBC greater than 2,000/ul, ANC greater than 1,000/ul, platelets greater than 100,000/ul. Creatinine clearance is needed for patients with creatinine greater than 1.5 times upper limit of normal.

7. Pulse oximetry of 90% or greater on room air

8. Sexually active patients must be willing to utilize one of the more effective birth control methods for 6 months after the CTL infusion. Male partner should use a condom

9. Available autologous transduced T lymphocytes with 15% or more expression of HER2 CAR as determined by flow-cytometry and killing of HER2-positive targets 20 % or greater in cytotoxicity assay.

10. Chest radiograph for baseline evaluation of lungs

11. Informed consent explained to, understood by and signed by patient/guardian. Patient/guardian given copy of informed consent

EXCLUSION CRITERIA:

At time of Procurement:

1. Known HIV positivity

2. Severe previous toxicity from cyclophosphamide or fludarabine

At time of Treatment:

1. Severe intercurrent infection

2. Known HIV positivity

3. Pregnant or lactating

4. History of hypersensitivity reactions to murine protein-containing products

5. Severe previous toxicity from cyclophosphamide or fludarabine