Hammer Stock Blog

Immunogen becomes a $1B company

Immunogen (IMGN) concluded the week with a market cap of ~$1B, up 200% in less than a year. This valuation is quite unusual for a company that ascribes the vast majority of its value from a 3-5% royalty stake in a single drug - Roche’s T-DM1. T-DM1, which utilizes Immunogen’s antibody-drug conjugate (ADC) technology, comprises of Herceptin conjugated to a drug payload. It is in two phase III trials and multiple phase II studies in breast cancer. If proven effective, many believe T-DM1 will eventually replace Herceptin, at least in certain treatment lines.

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This is the second part of an article I posted back in April. The final list includes only 9 candidates, as one of the candidates (Seattle Genetics’ SGN-75) was taken off the list after generating fairly disappointing results at ASCO. Enjoy.

Micromet

Micromet (MITI), who is developing antibodies for cancer, definitely has a potential game changer in its hands. The company’s lead agent, blinatumomab (Bmab), belongs to a new class of antibodies called BiTE (Bispecific T cell Engagers). These antibodies can harness the patient’s immune system to attack tumors by redirecting T cells (the most potent immune cells in the body) against cancer cells. BiTE antibodies achieve this by simultaneously binding a cancer cell on one side and an immune cell on the other. This unleashes a potent anti-tumor immune response. (more…)

More melanoma breakthroughs

This year’s meeting will probably be remembered as a historical event with regards to melanoma. Last year, it was a phase III trial for BMS’ (BMY) Yervoy (ipilimumab), which was the first in history to show a survival benefit in advanced melanoma patients (discussed in my ASCO 2010 write up). This trial led to Yervoy’s historical approval 3 months ago.

This year, investigators will present studies evaluating Yervoy as well as Plexxikon/Roche’s vemurafenib in pretreated melanoma patients. Yervoy was evaluated in combination with chemotherapy while vemurafenib was compared with chemotherapy. According to BMS’ and Roche’s press releases, both studies were successful and each drug led to a survival benefit.  The extent of this benefit is still unknown and will be revealed only at the conference. (more…)

2011 is shaping up as a transformational year for Synta (SNTA), who is making progress on multiple fronts with its lead agent ganetespib (formerly known as STA-9090). Ganetespib is an Hsp90 inhibitor, a protein with a well recognized role in cancer. The concept of inhibiting Hsp90 to fight cancer goes back two decades, but all attempts have been beset by failures so far. As Synta’s ganetespib appears to be the first active and safe Hsp90 inhibitor, it is poised to make a big dent in the multibillion dollar oncology market. I discussed the history of Hsp90 inhibitors and Synta’s unique positioning in a previous write up.)

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Last week, Sanofi-Aventis (SNY) announced disappointing results from a phase III trial evaluating iniparib in breast cancer. The drug failed to improve survival and progression-free survival (PFS) in breast cancer patients and although actual data were not published, approval is unlikely even for a subset of patients. Failed phase III trials are quite common in oncology, a field with one of the highest attrition rates in the pharmaceutical industry. Nevertheless, iniparib’s failure is particularly disturbing, as the phase III was supported by compelling results from a randomized controlled phase II trial as well as strong scientific rationale. Importantly, this trial could have broader implications as it raises questions regarding the role of randomized phase II trials as a go/no go decision point for pivotal trials. 

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In the pharmaceutical industry, it is very common to see multiple drugs in development that go after the same target. Usually, there is a direct correlation between the recognition a target has and the number of competing agents. This is the case with “hot targets” such as PI3K,RAF and mTOR, which are pursued by many pharma and biotech companies.

In most cases (especially with targeted therapies), the different compounds are being developed in parallel, and there is no way of identifying a clear winner. This can persist even after approval. For instance, both BMS Pfizer and Novartis (NVS) have an mTOR inhibitor on the market for the treatment of renal cancer. It is clear both drugs are active but each compound was approved based on a different trial in a different patient population, so neither can claim superiority.

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Synta (SNTA) is recuperating nicely from last year’s meltdown following the failure of its melanoma drug, elesclomol. The company is gaining momentum thanks to its early stage Hsp90 (heat shock protein 90) inhibitor, STA-9090. STA-9090 seems to garner a lot of attention in the medical community following the presentation of encouraging phase I data at ASCO last June. Based on the preliminary results, STA-9090 could be what the industry has been waiting for: A broad and potent Hsp90 with an acceptable safety profile.

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Exelixis (EXEL) came under a lot of pressure recently and the stock is now trading near its 52 week low following two unrelated events that took place last month. In late June, the company announced the resignation of its CEO, George Scangos, who was appointed as Biogen Idec’s (BIIB) CEO. Earlier that month, the company announced BMS (BMY) decided to give back rights for Exelixis’ flagship product, XL184. Adding to the pressure are interesting but not stellar clinical results for some of the company’s compounds at ASCO and potentially an additional partnership termination. (more…)

The hottest theme at this year’s 2010 ASCO (American Society of Clinical Oncology) annual meeting was without a doubt cancer immunotherapy, an old paradigm that deals with redirecting the patient’s immune system against tumors. After decades of failures, this concept is finally proving itself useful. There are basically two approaches:  1) cancer vaccines that aim at eliciting an immune response against specific targets on cancer cells and 2) immunomodulatory drugs that aim at stimulating the immune system in a more general manner (not target specific). The undisputed leader in cancer vaccines is Dendreon (DNDN), which currently has the only FDA approved cancer vaccine. Following ASCO, it looks like the leader in immunomodulation drugs is BMS (BMY).

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