Summary
This study is investigating the activity of an immunotherapy checkpoint called PD-L1 and the activity of the immune T-cells (CD* T-cells) that kill cancer cells.
In this study, researchers will test proven and new types of cancer imaging (scans). They will test if the scans show new information about non-small cell lung caner (NSCLC) and if the information shown on the scan matches information shown in pathology.
You may be eligible for this study if you are aged 18 and over, have NSCLC and are going to receive radiation therapy treatment. You must also have acceptable kidney function and agree to come in for the study follow-up assessments. Female participants must be either post-menopausal or have a negative pregnancy test.
All participants will be asked to undergo a Positron EMission Tomography (PET)/Computed Tomography (CT) with fluoro-deoxyglucose (FDG), which is a standard scan used to detect lung cancer.
PET/CT scanning is achieved by injecting a small amount of radioactive material (called a tracer) into your bloodstream followed by imaging your body by passing you through a PET/CT scanner whilst you lie on your back.
This study is using 2 PET tracers: 89Zr-Df-crefmirlimab (CD8 PET), which shows us where the T-cells are in your body and 89Zr-durvalumab, which is made with an immunotherapy drug that targets the protein PD-L1. PD-L1 is a protein that keeps immune cells from attacking non-harmful cells in the body.
Researchers think that some cancer cells have high amounts of PD-L1 at the beginning of immunotherapy treatment, but that this may change during treatment, allowing the cancer cells to grow. Alternatively, the cancer cells may remain sensitive to durvalumab, but the tumours do not have enough CD8 T-cells to kill the cancer cells.