Hepatocellular Carcinoma Clinical Trial
Official title:
T Cells co- Expressing a Second Generation Glypican 3-specific Chimeric Antigen Receptor With Cytokines Interleukin-21 and 15 as Immunotherapy for Patients With Liver Cancer
This study is for patients that have a type of cancer that arises from the liver, either
called hepatocellular carcinoma or hepatoblastoma. The cancer has come back, has not gone
away after standard treatment or the patient cannot receive standard treatment. This research
study will use special immune system cells called TEGAR T cells, a new experimental
treatment.
The body has different ways of fighting infection and disease. No single way seems perfect
for fighting cancers. This research study combines two different ways of fighting cancer:
antibodies and T cells. Antibodies are types of proteins that protect the body from
infectious diseases and possibly cancer. T cells, also called T lymphocytes, are special
infection-fighting 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. They have shown promise but have not been strong enough to cure most patients. The
investigator found from preclinical research that they can put a new gene into T cells that
will help them recognize cancer cells and kill them. In our preclinical studies, several
genes were made called a chimeric antigen receptor (CAR), from an antibody called GC33 that
recognizes glypican-3, a protein found on almost all hepatocellular carcinoma cells and
hepatoblastoma cells (GPC3-CAR). In the laboratory the investigators have been doing research
into GPC3-CAR cells. They have selected the GPC3-CAR with the strongest ability to recognize
hepatocellular carcinoma or hepatoblastoma cells for this study. This is a safety study where
the investigator will be testing the ability of GPC3-CAR cells to identify and kill tumor
cells in patients. The investigators also tested the effects of adding the molecule
interleukin-15 (IL-15) alone or with another molecule called interleukin-21. The
investigators found that IL-15 alone or together with IL-21 can help GPC3-CAR T cells last
longer which helps them to kill more tumor cells. In this study the investigator will be
testing the ability of GPC3-CAR cells to identify and kill tumor cells in patients. This is a
study looking at safety and the investigators will therefore be starting with GPC3-CAR T
cells alone in a set of patients. The first set of patients will receive GPC3-CAR T cells
that also express IL-15. In the second group, the investigators will evaluate GPC3-CAR T
cells that express both IL-15 and IL-21. If the investigators are able to safely give GPC3-
CAR T cells, they will increase the dose of the combination cells in other patients. The
product or dose level of cells that the participant will receive is based on when they are
enrolled on the study.
The GPC3-CAR T cells are an investigational product not approved by the Food and Drug
Administration.
The purpose of this study is to find the biggest dose of GPC3-CAR T cells that is safe, to
see how long they last in the body, to learn what the side effects are and to see if the
GPC3-CAR T cells will help people with GPC3-positive hepatocellular carcinoma or
hepatoblastoma.
A maximum of 42 subjects will participate in the treatment part of this study.
The investigators will collect up to 180 mL of the participants blood. The investigators will
use this blood to grow T cells. They will grow the T cells and use a retrovirus (a special
virus that can carry the GPC3 CAR gene into the T cells) to genetically engineer them. After
the CAR gene are put into the T cells, the investigators will make sure that they are able to
kill hepatocellular carcinoma or hepatoblastoma cells in the laboratory.
LYMPHODEPLETION CHEMOTHERAPY:
Several studies suggest that the infused T cells need room to be able to proliferate and
accomplish their functions and that this may not happen if there are too many other T cells
in circulation. Because of that, participants will receive treatment with cyclophosphamide
(Cytoxan) and fludarabine for 3 days before receiving the T-cell infusion. These drugs will
decrease the numbers of the participants' T cells before the investigator infuse the GPC3-CAR
T cells.
WHAT THE INFUSION WILL BE LIKE:
After making these cells, they were frozen. If the patient agrees to participate in this
study, they will be scheduled to be treated, the cells will then be thawed and injected into
the participant over 5 to 10 minutes. The participant will receive the GPC3-CAR T CELLS 48-72
hours after completing the chemotherapy. The participant may be pretreated with Tylenol
(acetaminophen) and Benadryl (diphenhydramine). Tylenol and Benadryl are given to prevent a
possible allergic reaction to the T cell administration.
This is a dose escalation study, which means that investigator does not know the highest dose
of GPC3-CAR T cells that is safe. To find out, the investigator will give the cells to at
least 3 participants at one dose level. If that is safe, the investigator will raise the dose
given to the next group of participants. The dose each patient gets will depend on how many
participants get the agent before that patient and how they react. The investigator will tell
each patient this information. This will help the patient think about possible harms and
benefits. Since the treatment is experimental, what is likely to happen at any dose is not
known.
All of the Treatments will be given by the Center for Cell and Gene Therapy at Houston
Methodist Hospital.
Medical tests before treatment:
- Physical exam and History
- EKG (electrocardiogram) to assess heart function
- Blood tests to measure blood cells, kidney and liver function and blood clotting (INR).
- If the patient is infected with the hepatitis B virus (HBV) they will do a test to
measure the levels of the virus
- Pregnancy test (if the patient is a female who can get pregnant)
- Measurements of the patient's tumor by scans (CT/MRI) and the tumor marker
alfa-fetoprotein (AFP), if the patient's tumor produces this protein.
Medical tests during and after treatment:
- Physical exams and History
- Blood tests to measure blood cells, kidney and liver function and blood clotting (INR)
- If the patient is infected with the hepatitis B virus (HBV), the investigator will do a
test to measure the levels of the virus
- Measurements of the tumor maker alfa-fetoprotein (AFP), if the patient's tumor produces
this protein
- Measurements of the patient's tumor by CT/MRI scans (6 -8 weeks after the infusion)
- Tumor biopsy
FOLLOW-UP STUDIES
The investigators will follow the participant during and after the injections. To learn more
about the way the T cells are working in the patient's body, up to 60 mL (12 teaspoons) of
blood will be taken from the participant before the chemotherapy, before the T-cell infusion,
3 to 4 hours after the infusion, 3 to 4 days after the infusion (this time point is optional)
at 1 week, 2 weeks, 4 weeks, 6 weeks and 8 weeks after the injection, every 3 months for 1
year, every 6 months for 4 years and then every year for the next 10 years. Total time
participation for this study will be 15 years.
During the time points listed above, if the T cells are found in the patient's blood at a
certain amount an extra 5 mL of blood may need to be collected for additional testing.
The investigator will use this blood to look for the frequency and activity of the cells that
they have given ; that is, to learn more about the way the T cells are working and how long
they last in the body. The investigator will also use this blood to see if there are any
long-term side effects of putting the new gene (chimeric antigen receptor, CAR) into the
cells. In addition to the blood draws, because patient's have received cells that have had a
new gene put in them, they will need to have long term follow up for 15 years so the
investigator can see if there are any long term side effects of the gene transfer.
Once a year, the patient will be asked to have their blood drawn and answer questions about
their general health and medical condition. The investigators may ask the patient to report
any recent hospitalizations, new medications, or the development of conditions or illness
that were not present when the patient enrolled in the study and may request that physical
exams and/or laboratory tests be performed if necessary.
In the event that a tumor biopsy is performed for clinical reasons the investigators will
request permission to obtain excess sample to learn more about the effects of the treatment
on the patient's disease. In the event of death, the investigators will request permission to
perform an autopsy to learn more about the effects of the treatment on the patient's disease
and if there were any side effects from the cells with the new gene .
In addition, the investigators will obtain tumor biopsy for research purposes only.
Associated risk with the biopsy will be discussed with the participant in detail in a
procedure specific consent form. The investigators will test the sample to see if the
GPC3-CAR T cells can be found in the tumor and what effect they had on the tumor cells.
If the patient develops a second abnormal cancer 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).
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