GD2 Specific CAR and Interleukin-15 Expressing Autologous NKT Cells to Treat Children With Neuroblastoma — GINAKIT2  

Neuroblastoma Clinical Trial

Official title: GD2 Specific Chimeric Antigen Receptor (CAR) and Interleukin-15 Expressing Autologous Natural Killer T-cells to Treat Children With Neuroblastoma

Status Recruiting

Clinical Trial Summary

This research study combines two different ways of fighting cancer: antibodies and Natural Killer T cells (NKT). Antibodies are types of proteins that protect the body from infectious diseases and possibly cancer. T cells, also called T lymphocytes, are special white blood cells that can kill other cells, including cells infected with viruses and tumor cells. Both antibodies and T cells have been used to treat patients with cancers. Investigators have found from previous research that they can put a new gene into T cells that will make them recognize cancer cells and kill them. In a previous clinical trial, investigators made artificial genes called a chimeric antigen receptors (CAR), from an antibody called 14g2a that recognizes GD2, a molecule found on almost all neuroblastoma cells (GD2-CAR). Investigators put these genes into the patients' own T cells and gave them back to patients that had neuroblastoma.

NKT cells are another special subgroup of white blood cells that can specifically go into tumor tissue of neuroblastoma. Inside the tumor, there are other white blood cells called macrophages which help the cancer cells to grow and recover from injury. NKT cells can specifically kill these macrophages and slow the tumor growth.

We will expand NKT cells and add GD2-specific chimeric antigen receptors to the cells. We think these cells might be better able to attack NB since they also work by destroying the macrophages that allows the tumor to grow. The chimeric antigen receptor will also contain a gene segment to make the NKT cells last longer. This gene segment is called CD28. In addition, to further improve the antitumor activity of the GINAKIT cells we added another gene expressing a molecule called Interleukin -15 (IL-15). The combination of these 3 components showed the most antitumor activity by CAR expressing NKT cells and improved these cells' survival in animal models.

GD2-CAR expressing NKTs have not been tested in patients so far. The purpose of this study is to find the largest effective and safe dose of GD2-CAR NKT cells (GINAKIT cells), to evaluate their effect on the tumor and how long they can be detected in the patient's blood and what affect they have on the patient's neuroblastoma.

Clinical Trial Description

In this study the first step is to collect blood from the patient to make the GINAKIT cells. Once the GINAKIT cells are made they will be administered to the patient.

This is a dose escalation study. This means that at the beginning, patients will be started on the lowest dose (1 of 6 different levels) of GINAKIT cells. Once that dose schedule proves safe, the next group of patients will be started at a higher dose. This process will continue until all 6 dose levels are studied. If the side effects are too severe, the dose will be lowered or the infusions will be stopped.

Before getting the GINAKIT cells, the patient will receive cyclophosphamide and fludarabine intravenously (through a needle inserted into a vein or the patient's port-a-cath) for 2 days and then fludarabine alone for one more day. The patient will then have one day of rest with no chemotherapy before receiving the GINAKIT cells.

The patient will be given an injection of GINAKIT cells into the vein through an IV line at the assigned dose. Before the patient receives the injection, they may be given a dose of Benadryl (diphenhydramine) and Tylenol (acetaminophen). The injection will take up to 10 minutes. The patient will be monitored in the clinic after the injection for about 4 hours. The treatment will be given by the Center for Cell and Gene Therapy at Texas Children's Hospital.

The patient will need to stay in Houston for 4 weeks after the infusion so investigators can monitor the patient for side effects. The patient will have follow-up visits (at weeks 1, 2, 3, 4 and 8; months 3, 6, 9, and 12; twice a year for 4 years and then once a year for the next 10 years - for a total of 15 years) and scheduled disease evaluations after the GINAKIT cell infusion (at week 6 and then as clinically needed).

Before being treated, the patient will receive a series of standard medical tests as follows:

• Physical exam

• Blood tests to measure blood cells, kidney and liver function

• Buccal swabs (cheek scraping)

• Measurements of your tumor by routine imaging studies and bone marrow evaluation within 4 weeks (preferably 2 weeks) before start of lymphodepletion (no other cancer treatment should be given after these studies and the GINAKIT cell infusion). Imaging studies that have been used in the past to best assess your tumor will be used (Computer Tomogram (CT) or Magnetic Resonance Imaging (MRI), and Positron Emission Tomography (PET/CT), and/or MIBG scan). A PET scan is an imaging test that uses radioactive material to look for disease in the body. A MIBG scan is an imaging test that uses radioactive material and a special scanner to find or confirm the presence of neuroblastoma.

The patient will receive standard medical tests when they are getting the infusions and afterwards as follows:

• Physical exams

• Blood tests to measure blood cells counts, kidney and liver function.

• Measurements of the patient's tumor by routine imaging studies 4-6 weeks after the infusion.

• Tumor biopsy at 2 weeks and between 4-6 weeks after the infusion and as clinically indicated thereafter. The evaluation at week 2 after the infusion is for research only and is done to see whether or not there are GINAKIT cells in the tumor. For all clinically indicated tumor biopsies a portion of the sample for research will be requested.

• If a tumor was in the bone marrow at the time of treatment, the procedure will be repeated at 2 weeks and between 4-6 weeks after the infusion and as clinically indicated thereafter. The evaluation at week 2 after the infusion is for research only and is done to see whether or not there are GINAKIT cells in the bone marrow. For all clinically indicated bone marrow collections a portion of the sample for research will be requested.

To learn more about the way the GINAKIT cells are working and how long they last in the body, an extra amount of blood will be obtained before the chemotherapy, on the day of the GINAKIT cell infusion (before and at the end of the infusion), 1, 2, 3, 4 and 8 weeks after the GINAKIT cell infusion, every 3 months for the 1st year, every 6 months for the next 4 years and then once a year for the next 10 years (for a total of 15 years). The amount of blood taken will be based on the patient's weight with up to a maximum of 60 ml (12 teaspoons) of blood to be obtained at any one time. For children, the total amount of blood drawn will not be more than 3 ml (less than 1 teaspoon) per 1 kg of body weight on any given day. This volume is considered safe, but may be decreased if the patient is anemic (have a low red blood cell count). This blood will also be used to monitor your white blood cell levels. In the event your white blood cell counts are high, you will be admitted to the hospital where you will be treated with hydration, steroids or chemotherapy. The study doctor will discuss with you the best treatment options.

During the time points listed above, if the GINAKIT cells are found in the patient's blood at a certain amount, an extra 5ml of blood may need to be collected for additional testing.

If the patient has a procedure where tumor samples are obtained, investigators will request a sample to be used for research purposes.

If the patient develops a second abnormal growth, significant blood or nervous system disorder during the trial, a biopsy sample of the tissue will be tested (if a sample can be obtained).

The patient will receive supportive care for any acute or chronic toxicities, including blood components or antibiotics, and other intervention as appropriate.

Because the patient will receive cells with a new gene in them they will be followed for a total of 15 years to see if there are any long term side effects of gene transfer. ;

Related Conditions & MeSH terms

• Neuroblastoma

• NCT number: NCT03294954
• Study type: Interventional
• Source: Baylor College of Medicine
• Contact: Andras Heczey, MD
• Phone: 832-824-4233
• Email: axheczey@txch.org
• Status: Recruiting
• Phase: Phase 1
• Start date: January 18, 2018
• Completion date: August 10, 2040