It’s a PD-1 Checkpoint Inhibitor drug, which means it just turns off the cloaking that the body turns on to prevent autoimmune disease and the the tumor is already hot, so the immune system can identify the cancer and take it out.
1) likely other checkpoint inhibitors will have a similar impact for this particular cancer with these biomarkers.
2) DCVax turns on the immune system to a cancer when the cancer is NOT hot already but cold and is not being attacked by the immune system. For instance, in GBM, PD-1 and PD-L1 Checkpoint Inhibitors (CI’s) do not work. For most cancers CI’s may have some impact but often the my do not extend survival and the impact is not as dramatic.
3) this drug, being of the same nature and class as similar drugs like Keytruda, will compete with that line of drugs when that particular task is required.
More likely this drug will add to the CI’s available to combine with DCVax where immune responses subsequently trigger the relevant PD-1/PD-L1 masking of the cancer that CI’s turn off. Cancer is generally dynamic and the pathology of the disease is complex. It worked for this subset of patients, and that is great, but journalists and readers are not well informed about immunotherapies so it sounds like a miracle drug but it is doubtful that it will impact in other cancers where these very specific and narrow biomarkers are not the dominant factor.