Phase II Study of Metastatic Melanoma With Lymphodepleting Conditioning and Anti-gp100:154-162 TCR Gene Engineered Lymphocytes

• Status: Terminated
• Trial end date: 2012-07-01

Summary

Background:

• Human peripheral blood lymphocytes have been engineered to express a T-cell receptor (TCR) that recognizes a blood type, human leukocyte antigen (HLA-A*0201) derived from the gp100 protein. A retroviral vector was constructed that can deliver the TCR to cells.

• This gene-engineered cell is over 10 times more reactive with melanoma cells than is the melanoma antigen recognized by T-cells (MART-1) TCR that resulted in tumor shrinkage for two patients with metastatic melanoma.

Objectives:

• To determine whether an anti-melanoma protein receptor can be put in cells removed from patients' tumors or blood and then reinfused, with the purpose of shrinking tumors.

• To evaluate safety and effectiveness of the treatment.

Eligibility:

• Patients 18 years of age or older with metastatic cancer melanoma (cancer that has spread beyond the original site).

• Patient's leukocyte antigen type is HLA-A*0201.

Design:

-Patients undergo the following procedures:

• Leukapheresis (on two occasions). This is a method of collecting large numbers of white blood cells. The cells obtained in the first leukapheresis procedure are grown in the laboratory, and the anti-gp100 protein is inserted into the cells using an inactivated (harmless) virus in a process called retroviral transduction. Cells collected in the second leukapheresis procedure are used to evaluate the effectiveness of the study treatment.

• Chemotherapy. Patients are given chemotherapy through a vein (intravenously, IV) over 1 hour for 2 days to suppress the immune system so that the patient's immune cells do not interfere with the treatment.

• Treatment with anti-gp100. Patients receive an IV infusion of the treated cells containing anti-gp100 protein, followed by infusions of a drug called IL-2 (aldesleukin), which helps boost the effectiveness of the treated white cells.

• Patients are given support medications to prevent complications such as infections.

• Patients may undergo a tumor biopsy (removal of a small piece of tumor tissue).

• Patients are evaluated with laboratory tests and imaging tests, such as CT scans, 4 to 6 weeks after treatment and then once a month for 3 to 4 months to determine the response to treatment.

• Patients have blood tests at 3, 6, and 12 months and then annually for 5 years.

• Phase: Phase 2

Details

• Lead Sponsor: National Cancer Institute (NCI)
• Treatments: Aldesleukin; Cyclophosphamide; Fludarabine; Fludarabine phosphate; Vidarabine