"Among patients with non-small cell lung cancer (NSCLC) treated with the investigational immune checkpoint inhibitor MK-3475, those whose tumors had high levels of the protein PD-L1 had significantly better outcomes, according to results of a phase I clinical trial presented here at the AACR Annual Meeting 2014, April 5-9.
"Preliminary data from the trial, which were reported earlier this year, showed that MK-3475 treatment was well tolerated and led to durable, objective responses in previously treated patients with NSCLC, particularly those with tumors found to have high levels of PD-L1 prior to treatment.
"The latest results extend these data, showing that at six months after starting treatment, 41 percent of patients whose tumors had high levels of PD-L1 had no disease progression, compared with 17 percent of those whose tumors had low levels of PD-L1. Similarly, 72 percent of patients whose tumors had high levels of PD-L1 were alive at this time, compared with 53 percent of those whose tumors had low levels of PD-L1."
Editor's note: MK-3475 is an immunotherapy drug, which means it boosts a patient's own immune system to fight cancer. This study found that it was more effective in patients whose tumors had high levels of the protein PD-L1, as detected by molecular testing. To learn more about immunotherapy treatments for lung cancer, visit this blog post.