Recently, Merck have been on a roll in the immuno-oncology space, with the announcement that their anti-PD–1 antibody, pembrolizumab (Keytruda), beat out BMS’s anti-CTLA4 antibody, ipilimumab (Yervoy) in a Phase 3 head-to-head frontline trial in metastatic melanoma. The two primary endpoints of OS and PFS were met and the trial will therefore be stopped early based on the IDMC recommendation. No further details are available until the presentation.
Some really intriguing news was announced this morning, with Aduro Biotech issuing a press release on their new global collaboration with Novartis for their “immuno-oncology products derived from its proprietary STING-targeted CDN platform technology.”
Today I’m answering recent questions from readers, in this case on checkpoint inhibition and where this field is going in the near future.
As we’re coming to the end of our European Association Urology (EAU) coverage for 2015, I wanted to discuss at a rather more quirky, off-the-wall topic and look at one of the gems from the poster halls at this conference.
We’ve been following the updates on the PREVAIL study evaluating enzalutamide (Xtandi) versus placebo in metastatic castrate-resistant prostate cancer (CRPC) in the pre-chemotherapy setting for a while now. It’s interesting to see how the data evolves over time as it becomes more mature.
At the last count, the renal cell carcinoma (RCC) space is quite competitive with five VEGF inhibitors (sunitinib, sorafenib, axitinib, pazopanib and bevacizumab), two mTOR blockers (temsirolimus and everolimus) and not forgetting IL–2, all approved by the FDA for the treatment of advanced disease.
Here’s something interesting and heart warming to reflect on at the end of a long week:
Over the last few years we’ve heard a lot about the evaluation of predictive biomarkers for checkpoint inhibitors, in particular the value of using PD-L1, whether on immune or tumour cells, as a way of separating responders and non-responders to therapy with anti-PD1 or anti-PDL1 blockers. The results to date have been mixed, with some KOLs concluding that smoking history or number of mutations was more useful in lung cancer and others believing that their assay has better utility.
One of my favourite meetings of the year in our conference calendar is the American Association for Cancer Research (AACR) annual meeting, which is held in the spring. In years past, the agenda at this event has set the scene for the rest of the year in terms of emerging new trends, particularly with regards to targeted therapies. In the last two years though, this hasn’t been the case, as adjusting to the brave new world of immunotherapies has taken some time.
It’s time to answer some more subscriber questions. Several readers wrote in and asked about the anti-PD1 checkpoint data that was presented at the recent American Society of Hematology (ASH) meeting in classic Hodgkin’s lymphoma (cHL):