Re: Farmas USA
Algo más sobre Array Biopharma, en Hammer Stock Blog (5/2/12)(http://www.hammerstockblog.com/biotech-stocks-to-watch-in-2012/)
Array Biopharma – Many irons in the fire
Array Biopharma (ARRY) remains an undervalued stock, with more clinical programs than any of its peers and a market cap of just ~$176M. As I discussed last year, Array’s depressed price is a result of the fact that none of its drugs has a clear route to market, combined with a long term debt overhang (due 2015).
Its pipeline includes 4 wholly owned programs and 10 partnered programs, many of which are expected to generate meaningful data in 2012.
The most important data set will be from a randomized phase II trial of selumetinib (a MEK inhibitor developed by AstraZeneca) in lung cancer. The trial evaluated selumetinib when added to Taxotere in 90 patients with KRAS mutation. Although the trial was technically a failure, the results might still be good enough to merit advancing the drug to phase III.
Selumetinib led to a statistically significant increase in progression-free survival (PFS) as well as response rate. It also led to a numerical difference in overall survival but this difference was not statistically significant, which is not surprising given the relatively small size of the trial (this is why the trial was defined as a failure). Actual numbers will be disclosed at ASCO, and if positive, could make selumetinib the first of Array’s programs with a clinical proof of concept as well as a clear route to market.
Selumetinib is being evaluated in two additional randomized studies in B-RAF mutated melanoma and ocular melanoma, respectively. The first study evaluates selumetinib when added to chemotherapy and is expected to report data in the coming months. Even if the trial is positive, it will be hard to beat Zelboraf, which is the current standard of care for BRAF mutated melanoma. The ocular melanoma study, which is sponsored by the NCI, evaluates selumetinib vs. chemotherapy in 200 patients. Timelines for this study are unclear, but it could generate topline data this year as well.
Array has licensed another MEK inhibitor (MEK162) to Novartis 2 years ago. This program is much earlier than selumetinib, currently in multiple combination phase I studies. The only phase II trial is in melanoma patients with BRAF or NRAS mutations, where the drug as given as monotherapy. Results from this trial are expected at ASCO and could be important as they will probably include BRAF mutated patients who progressed on Zelboraf or NRAS mutated patients who are not eligible for Zelboraf. Both of these populations represent a fast route to market. Earlier this month, Array announced the drug achieved clinical proof of concept according to Novartis.
Another program expected to generate important data is ARRY-520, a KSP inhibitor. The drug, which is fully owned by Array, already demonstrated signs of efficacy in heavily pre-treated multiple myeloma patients. The activity is superior to other targeted agents that are now in phase III trials but still appears too low to justify pursuing ARRY-520 as monotherapy. Array is conducting two combination trials with dexamethasone and Velcade, respectively. Both studies are single arm trials, but they could be relevant in putting ARRY-520 in perspective compared to other investigational agents.
Another program that could reach a clinical milestone is ARRY-797, Array’s p38 inhibitor for pain. As pain is more complex from a development perspective given the large number of generic pain-killers, Array has been trying to identify an indication for this molecule for several years. ARRY-797 already demonstrated analgesic activity in a dental study reported in 2008 as well as in a trial in rheumatoid arthritis, but neither indication represented an attractive development opportunity. The company recently initiated a randomized trial in osteoarthritis of knee where ARRY-797 is compared head to head with an opioid or placebo. The study’s goal is proving ARRY-797 is at least as effective as the opioid analgesic, with the intent of replacing opioids that are associated with side effects and addiction issues. Results are expected later in 2012.