If there’s one topic that has generated a LOT of questions from BSB readers this month it is Puma Biotech’s neratinib in adjuvant breast cancer.
The FDA briefing documents came out yesterday and that started another flurry of ‘what do you think of them?’ style questions so here goes. I will say that while many are eulogizing ‘benign’ or ‘friendly’ on close reading and studying them, I’d say caveat emptor.
Things are not always what they seem.
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At the recent 2016 San Antonio Breast Cancer Symposium (SABCS16), Cascadian Therapeutics (NASDAQ: CASC) presented a poster (Abstract #P4–21–01) on:
“Efficacy Results of a Phase 1b Study of Tucatinib (ONT–380), an Oral HER2-Specific Inhibitor, in Combination With Capecitabine and Trastuzumab in HER2+ Metastatic Breast Cancer, Including Patients with Brain Metastases.”
Tucatinib is an oral tyrosine kinase inhibitor that is highly selective for HER2.
Cascadian’s tucatinib poster at #SABCS16
We’ve seen several new treatments approved for HER2 positive breast cancers in recent years including four targeted treatments: trastuzumab, pertuzumab, lapatinib and T-DM1.
Other companies such as Puma Biotech (NASDAQ: PBYI) also have oral TKIs in development. Puma’s drug, neratinib has, however been shown to have a high incidence of grade 3+ diarrhea, raising questions about its tolerance.
At SABCS16 (Abstract P02–11–03), the company presented the interim analysis of an open-label, multicenter phase 2 trial, which explored their compound:
“Incidence and severity of diarrhea with neratinib + intensive loperamide prophylaxis in patients (pts) with HER2+ early-stage breast cancer (EBC).”
There has been a lot of interest and controversy in this space, so it’s time to take a look at the latest events in HER2+ breast cancer and consider the ramifications since there are a number of new developments that are well worth following, including neratinib (Puma Biotech) and pertuzumab (Genentech).
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In today’s post, it’s time to address a bunch of questions we’ve received over the last few weeks from subscribers about the latest and – not so greatest – in cancer research.
ASCO 2015 Chicago
Sometimes these queries are fairly straightforward to answer, other times requires some sleuthing and hunting down thought leaders for some additional context and insights… For obvious reasons, these folks are best caught in person at cancer conferences such as AACR and ASCO. The feedback isn’t always sparkly and positive though, it can also be gloom and doom, just like the inclement weather!
So here goes, questions on the following are covered in the article below:
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