RE: Head and neck cancer RNS3 Apr 2017 17:29
Really encouraging RNS. The current line of thinking is that both Merck's Keytruda and BMS' Opdivo anti PD-1 immunotherapy treatments produce a greater response rates in patients with tumours expressing high levels of PD-L1. There are several other checkpoint inhibitors in development falling into this category too. So this is great news.
"The results show that in a study of 40 cancer patients, the Parsortix system demonstrated higher sensitivity and greater purity in harvesting CTCs for analysis than leading alternative approaches. Information regarding the expression of key genes (including PD-L1 and CK-19) could be determined from simple blood samples taken from each patient. In parallel, identical samples from each patient were assessed using antibody-based (EpCAM-dependent) approaches. These approaches failed to detect PD-L1 or CK-19 in any of the 40 samples."