Last year in the UK over 60,000 cancer patients enrolled on clinical trials aimed at improving cancer treatments and making them available to all.
A study looking at 2 vaccines after surgery for melanoma skin cancer
This study looked at 2 vaccines, to see if they helped stop melanoma coming back in people who are at high risk of this happening.
The vaccines in this study both used a protein called NY-ESO-1. In one vaccine, the protein was combined with something called ISCOMATRIX, which can stimulate the immune system. In the other vaccine, the protein was combined with a virus (which had been altered so that it could not cause disease). The researchers hoped that using 2 vaccines may cause the immune system to respond more.
The aims of this study were to
- Find out if these vaccines can cause an
- Learn more about how safe they are and what the side effects are
Summary of results
This study showed that these vaccines can stimulate the immune system in some people.
This study recruited 39 people who’d had surgery for melanoma skin cancer. They were put into one of 2 groups at random.
- 18 people in group A had 3 doses of NY-ESO-1 with ISCOMATRIX, and then 3 doses of NY-ESO-1 with the modified virus
- 21 people in group B had 6 doses of NY-ESO-1 with ISCOMATRIX
The research team took blood samples from each patient several times during treatment.
They looked at the number of white blood cells called T cells which are part of our immune system. They specifically looked at CD4 T cells and CD8 T cells. They also looked to see if other white blood cells called B cells made antibodies in response to the vaccine. An increase in the number of T cells or antibodies can show there has been an immune response.
They found that
- Everyone in group A and group B had an increase in CD4 T cells, and produced antibodies against the vaccine
- 3 out of 18 people in group B had a significant increase in CD8 T cells, and another 11 people had a small increase
- They could identify small parts of the NY-ESO-1 protein that seem to trigger a stronger immune responses
The vaccines did have some side effects, although most were mild. The most common side effects were soreness and redness at the injection site, flu like symptoms and tiredness (fatigue).
These results show that the vaccines in this study can cause an immune response. The research team hope that the information they found out in this study will help researchers plan future studies.
We have based this summary on information from the team who ran the study. The information they sent us has been reviewed by independent specialists (
How to join a clinical trial
Professor Vincenzo Cerundulo
Cancer Research UK
Experimental Cancer Medicine Centre (ECMC)
Ludwig Institute for Cancer Research