Around 1 in 5 people diagnosed with cancer in the UK take part in a clinical trial.
A study looking at a new vaccine to treat leukaemia (WIN)
Please note - this trial is no longer recruiting patients. We hope to add results when they are available.
This study is looking at a possible vaccine treatment for people with acute myeloid leukaemia (AML), and chronic myeloid leukaemia (CML). The vaccine is for people with a form of a gene called Human Leucocyte Antigen (HLA A2). This vaccine is designed to help immune system cells to find and destroy leukaemia cells. The treatment is directed against a substance called ‘Wilms tumour antigen’ (WT1).
Researchers think WT1 is important for your cancer cells to survive, and vaccinating against this could control the cancer. They hope the injection will help boost your immune system to make white blood cells called lymphocytes. Lymphocytes are able to remember and recognise a piece of WT1. Doctors hope that the vaccine will help the lymphocytes recognise and kill leukaemia cells.
DNA vaccination is a new treatment, which has only been tested in small groups of people so far. But this is the first time this type of vaccination has been tested in people. The main aims of this study are to
- See how a gene called ‘bcr/abl’ in CML responds to the vaccine treatment
- See if the vaccine works to stop AML coming back
Who can enter
You can enter this study if you either
- Have chronic myeloid leukaemia (CML) that is stable and only developing slowly (chronic phase)
- Have tested positive for the Philadelphia chromosome
- Are having a type of biological therapy called a tyrosine kinase inhibitor (such as imatinib (Glivec))
- Have had blood or bone marrow tests which now show no signs of the Philadelphia chromosome (a
cytogenetic response), but doctors can still find signs of CML cells in your blood
- Have acute myeloid leukaemia that is ‘Wilm’s tumour 1’ positive, and tests show that you are in either ‘complete response’ or ‘morphologic response’ – you can check this with your doctor
- Are well enough to carry out all your normal activities, apart from heavy physical work (performance status of 0 or 1)
- Have satisfactory blood tests
- Have veins that the study team can take blood from easily
- Are willing to use reliable contraception during the study and for 6 months afterwards if there is any chance you or your partner could become pregnant
- Are at least 18 years old
You cannot enter this study if any of the following applies to you
People who have CML
- Your CML is in accelerated phase or blast crisis, or you have had a ‘complete molecular response’ during your treatment with a tyrosine kinase inhibitor
- Doctors have changed the dose of your tyrosine kinase inhibitor in the last year, or you have stopped it for more than 15 days in the last 6 months
- You have had treatment with interferon
- Your bone marrow has less than the normal number of cells – you can check this with your doctor
People who have AML
- Your AML has come back or you are suitable to have a donor stem cell transplant
bone marrowhas fewer than the normal number of cells (you have hypocellular bone marrow) – you can check this with your doctor
- Your doctor has told you that your AML is likely to do well (‘good risk’ AML)
- You need to take
steroidtablets or drugs that dampen your immune system - please note, you must never stop taking steroids without talking to your doctor first
- You have had major surgery in the last 4 weeks and have not yet recovered
- You have an uncontrolled infection
- You have serious heart problems
- You have another medical condition that would make you unwell, or affect the results of the study
- Have had any other cancer, apart from non melanoma skin cancer that was successfully treated at least 5 years ago
- You have hepatitis B or C, HIV or a sexually transmitted infection called syphilis
This study aims to recruit 71 people into 2 groups. 32 people will have CML and 39 will have AML.
At the start of the study, everyone will have a blood test to look for a gene called Human Leucocyte Antigen (HLA A2). You need this gene for your immune system to be able to work with the vaccine. Being HLA A2 positive or negative will not affect the treatment of your condition, and it has no known effect on whether your cancer will get better or worse over time.
If you test positive for HLA A2, you will be in group 1 and have the vaccine. If you are HLA A2 negative, you will be in group 2. This is the control group, and you will not have the vaccine.
If you are in group 1, you will have a course of study vaccinations. You have 2 DNA vaccines once a month, for 6 months, and then every 3 months for the next 18 months. When the study started, some people just had vaccinations for 6 months. But following a change in 2012, everyone now has them for 2 years. You have the vaccines as an injection into a muscle in your arm or leg. At the same time as the injection, the nurse or doctor will pass a small electric current (lasting about half a second) through the needle. This is called electroporation, and it makes the vaccine work better by helping it enter the cells. The electric current may make your muscle jerk, a little like it would if you touched an electric fence.
You may feel a little pain and discomfort for a few minutes, and aches for a few days. The study team can offer you painkillers to help. If you are one of the first few people to have the vaccine in this study, you will stay at the hospital for a couple of hours so the team can watch for any side effects. You will also have a
You will fill out a questionnaire straight after your injection, and 2 days later. This will ask you what you think about electroporation, compared with normal injections. If for any reason you cannot cope with the injections or electroporation, you can tell the team, and you will stop the study treatment. But if possible, the team would like you to carry on having the study blood tests so they can see how you are getting on.
Before, and 6 months after your first vaccination, the team would like to collect a larger amount of white blood cells. This is called leukapheresis. To collect these cells you will have a tube coming out of a vein in one of your arms. Your blood will pass through this tube, into a machine called a cell separator. This spins the blood to separate out the white blood cells that the doctors need. The remaining blood goes back into your body through a tube in your other arm. This takes up to 3 hours. You may have tingling in your tongue or fingers, or feel faint. But this only lasts a few minutes, and does not affect everyone.
At 3 and 6 months the team would also like to give you a small injection under the skin of pieces of WT1 (peptides). This is to work out if your immune cells can now find the WT1 pieces. If you have a skin reaction, the team would like to numb the area and take a small sample of skin (a biopsy) to look for immune cells that have reacted to WT1.
If you are in group 2 (the control group) you will not have the vaccine, but you will see the study doctor regularly and have some blood tests.
The team would also like everyone’s permission to store blood samples to look at in the future. You do not have to agree to this if you don’t want to.
If you have CML, you continue your
After the study, you continue to see your regular specialist in the same way as you did before.
Before you start treatment you will see the doctor and have some tests. These tests include
- HLA status and a test to look for WT1 in your leukaemia cells
- Physical examination
- Heart trace (ECG) and
heart ultrasound (echocardiogram)(group 1)
- Blood tests
- Chest X-ray (and in 6 months) (group 1)
- Bone marrow test
- Collecting white blood cells (leukapheresis) (group 1)
If you are in group 1, you will have the vaccine every month for 6 months, then 6 more times over the next 18 months.
You will also visit the hospital for tests 12 times in the first 34 weeks. Then, between 11 and 36 months after starting the study you visit the hospital approximately every 3 months.
At each of these visits you will have
- Physical examination
- Blood tests
- Urine tests
Before each vaccination you will have a blood test. After each vaccination you will have a
- Heart trace (ECG)
- Questionnaire to check for pain or discomfort at the injection sites
Between weeks 24 and 28 you will have a
- Bone marrow test
- White blood cell collection (leukapheresis)
- Check for hypersensitivity (and at week 12)
If you are in group 2, you will have fewer hospital visits.
DNA vaccination is a new treatment, which has only been tested in small groups of people so far. All the information the researchers have suggest that DNA vaccines are safe. But a DNA vaccine with WT1 has not been tested in people before.
In vaccinations with short pieces of the WT1 protein (peptides), side effects have included
- A drop in white blood cells (in people with
myelodysplasia) - people with good numbers of bone marrow cells did not have a drop in their blood cell numbers
- Possible changes to kidney function
You may also have pain and discomfort where you had your injection.
How to join a clinical trial
Please note: In order to join a trial you will need to discuss it with your doctor, unless otherwise specified.
Professor Christian Ottensmeier
Experimental Cancer Medicine Centre (ECMC)
NIHR Efficacy and Mechanism Evaluation (EME) Programme
NIHR Clinical Research Network: Cancer
University Hospital Southampton NHS Foundation Trust
University of Southampton Clinical Trials Unit