Immunogen – Lost In Translation

Wednesday, October 15th, 2008

It finally happened. Yesterday, Genentech announced that they made a “go” decision to advance T-DM1 into a phase III trial. Although no official announcement is out as of yet, Genentech’s President of Product Development, Sue Hellmann, left no doubt in her prepared remarks:

“Additionally, we recently made a Phase III go decision for T-DM1 in the second line setting and plan to initiate a study comparing TDM1 to a Capecitabine plus lapatinib combination in the first half of 2009.”

Evidently, this kind of decision has tremendous implications on Immunogen from a financial stand point, as it is now closer than ever to receiving sales royalties on sales of a product that can be in the market as early as 2010. This kind of move should also trigger a substantial milestone payment. The company has not disclosed the exact size of the payment, but based on the $5 million Immunogen received after T-DM1 entered phase II and remarks made by Immuogen’s CEO, this milestone payment should be in the $8-10 million range. There are also plenty of additional implications on Immunogen’s ability to attract more partners and  sign more licensing deals, which is equally important because it will increase the number of Immunogen’s  shots on goal and provide a non-dilutive source of funding.

Amazingly, Genentech’s announcement is still not translated into an upward move in Immunogen’s stock, but it seems inevitable given Genentech’s position in the biotech field, T-DM1’s huge addressable market and the great validation of Immunogen’s technology. Genentech’s decision is also a good sign with respect to the ongoing phase II trial to be presented at the San Antonio Breast Cancer conference this December, since Genentech has access to up to date unpublished efficacy data.  

Small biotechs such as Immunogen are highly risky in the short run, and normally trying to predict  short-term movement of these stocks  would be futile. Nevertheless, I believe that the imminent official press release Immunogen has to publish (since it is a material event) creates a window of opportunity for  risk-tolerant investors, as the way I see it, a near term jump is inevitable.  Regardless of market conditions, Genentech’s  decision to promote a drug based on Immunogen’s technology into a registration trial is one of the most meaningful events a development stage biotech can have, and meaningful fundamental events eventually translate into meaningful moves in the stock price.

Author is long IMGN & DNA

When There Is Blood In The Streets - Buy Biotech

Friday, October 10th, 2008

History has shown again and again that times like these represent a huge long term buying opportunity. This may be particularly true for the biotech segment that, despite weathering the storm better than other segments, has had its share of price declines. During the past several weeks, great biotech stocks, from small early stage companies to fully commercialized companies have been thrown out of portfolios like bad auction rate securities, but the truth is that the value proposition of most of these biotechs did not change at all, and is not likely to change as a result of market conditions. This is why current prices create the best opportunity to get into the biotech segment since 2002.

In the past, the pharmaceutical segment served as a safe haven at times like these, based on the notion that drug sales, especially those for the treatment of serious illnesses, remain unaffected by recession. Unfortunately, most pharmaceutical companies are in the midst of an innovation crisis, where their traditional blockbusters are gradually being cannibalized by generic competition, so the next couple of years will be very challenging for them, recession or no recession. Consequently, investors may want to look for growth in the relatively new entrants to the field – biotech companies. 

 

Biotech companies can be divided into two groups, each has its own merits and pitfalls.

The first group includes fully commercialized companies with a healthy balance sheet and cash generating products. These include all the big biotech companies such as Genentech (DNA), Amgen (AMGN) and Gilead (GILD). Because these companies can be found in every typical portfolio, they all got hit pretty badly from the recent sell-off due to indiscriminate panic selling. Nevertheless, the impact of an anticipated recession will have on these companies, who are selling drugs that address diseases such as cancer and AIDS, will be marginal.

 

The second group consists of smaller, development stage companies, with no commercially available drugs and several cash consuming development programs. The good news is that fundamentally, these companies have nothing to do with the global economy because they are not selling anything. The bad news is that they have to constantly find resources to finance the costly development of their drug candidates. Thus, the most important implication a market crisis has on this kind of companies is that it makes cash-raising almost impossible.

This is why investors should invest only in development-stage biotechs which have found a way around this problem. Some companies can generate cash from licensing their technology or intellectual property, some, like Array (ARRY) and Poniard (PARD) arranged a line of credit, some, like Seattle Genetics (SGEN), were smart enough to do a secondary offering under good market conditions, some, like Exelixis (EXEL) and Immunogen (IMGN), licensed some of their products and have someone else paying for the development. 

Bearing in mind that in the foreseeable future, licensing of technology and products will be the preferred way of getting cash, it would particularly be wise to pay attention to companies with unpartnered assets that are generating robust data in clinical trials as well as to platform companies that can license their technology on a non-exclusive basis. Evidently, when small companies have one way of raising cash blocked, it might reduce their leverage position in the alternative route of partnering. However, thanks to the pressure traditional pharmaceutical companies are currently under, they are starved for new promising candidates, which means that a good drug candidate still has tremendous value in the eyes of big pharmas. A good example for such a promising candidate is Rigel (RIGL) Pharmaceutical’s R788 that showed impressive results in treating rheumatoid arthritis, a disease with a market size exceeding $ 10 billion. Another good example for that may be Arqule’s (ARQL) ARQ-197, which already demonstrated its potential in a wide array of cancers and has a blockbuster potential.      

 

In order to put this approach to the test, I asked Pontifax’s Ran Nussbaum his help in building a virtual portfolio of promising biotech stocks. This portfolio is not intended for short term trading, but for long term investment of at least several years. Although we do not expect active trading in this portfolio, from time to time there may be changes as additional stocks will be added and existing holdings may be sold. Any future changes can be made only when markets are closed. On a more cautionary note, regardless of the attractiveness of all of these companies, all the inherent risks associated with biotech remain, including long time to market and statistically low success rates.

 

                                        Biotech Portfolio as of October 9th 2008

model_portfolio_-_oct_9th_2008.PNG

 

 

 

Exelixis as a Platform Company

Sunday, August 31st, 2008


 

The pharmaceutical industry is in the midst of a severe innovation crisis, where more R&D money results in less approved drugs. In parallel, sales of most traditional blockbusters are being cannibalized by generic competition, forcing the big pharmas to exploit new concepts and rush new drug candidates to their pipelines. Nearly half of all drugs that are expected to enter the clinic in the coming years will be aimed at the oncology market. Consequently, early stage drug development for cancer is going to be the most active area in the industry, with an abundance of investment opportunities, particularly in small and medium companies. Many investors prefer to stay away from oncology drug development, where success rates are at a worrying low, hovering around 5% compared to 10% for the whole industry. Nevertheless, among the hundreds of publicly traded companies which are engaged in oncology, there may be a group of companies which have better chances of succeeding in such a monumental task. These companies are what I like to call platform companies.


In this article, I will try to explain what makes a good platform company and why Exelixis (EXEL) can be regarded as a good (yet not a perfect) example.  For the sake of clarification, I certainly do not claim that platform companies are the only investment worthy biotech companies, however, when it comes to early stage drug development, platform companies are an excellent place to start.

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Another Seal of Approval For Micromet

Sunday, August 17th, 2008


 

There is always a debate regarding market efficiency and to what extent stock prices represent the available information about a company. Micromet’s (MITI) surge last week shows that in some cases, the market is far from being efficient. The spike of more than 35% in the last two trading sessions is attributed to the publication of a short article in Science Magazine, one of the world’s most prestigious scientific journals. The article contained clinical data from an ongoing phase I trial of Micromet’s lead candidate, MT103 (partnered with Medimmune). The data was spectacular, showing a strong, dose dependent response in concert with a good safety profile, exactly the kind of data that can put a small biotech in the spotlight. Ironically, the article contained data which has already been presented more than two months ago at the ICML in Switzerland.

 

Regardless of whether market reaction was justified, publishing clinical data at such an early stage in Science should be viewed as an indication for the scientific community’s embrace of Micromet and its BiTE platform. The BiTE platform relies on monoclonal antibodies for stimulating the patient’s immune system to attack cancer cells that have managed to evade or suppress the body’s immune response. Although most attention is given to the first product from the platform, MT103, it can generate an unlimited number of agents against a variety of cancers, making it a potential revolution in the way cancer is treated.

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Genentech’s Shiny New Platform

Monday, August 4th, 2008


 

On June 18th, Seattle Genetics (SGEN) announced it had received a milestone payment from Genentech (DNA) after the latter filed an IND (Investigational New Drug) application for an antibody-drug conjugate (ADC) powered by Seattle Genetics’ technology.  Intriguingly, there was no additional data about the new agent, nor was there any official announcement from Genentech. An article that will be published in this month’s issue of Nature Biotechnology may shed some light on the identity of the new ADC and the technology it utilizes. Based on this article, the new agent will not be based solely on the familiar Seattle Genetics’ ADC technology, but will also utilize a next generation platform with potentially disruptive implications.

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Immunogen at ASCO 2008

Sunday, July 13th, 2008


Many terms can be used to describe Immunogen’s (IMGN) recent stock behavior, but it seems the word “schizophrenic” is the most suitable one. Immunogen gained almost 50%  in the three weeks prior to the ASCO annual meeting, just to give it all back in the 8 trading sessions following the conference, thus it is clear that the rollercoaster in the company’s share price had a lot to do with what was (or was not) presented at the conference. Immunogen is involved in multiple clinical programs, but for the past year the vast majority of the attention it has received was directed at T-DM1, which is being developed by Genentech (DNA) based on Immunogen’s technology. T-DM1 is garnering more attention than all the rest of Immoungen’s programs combined because it has all the necessary ingredients for the ultimate biotech story: Huge addressable market, a strong partner, impressive (yet preliminary) clinical activity and an opportunity to validate a disruptive technology. Accordingly, it is only reasonable to expect Immunogen to be traded in tandem with T-DM1’s development.

 

Wild swings in biotech stocks are commonly an outcome of clinical results publication, and indeed, the presented data at ASCO could be partially blamed for the violent market reaction. Nevertheless, in this particular case, Immunogen was affected from a lack of positive news rather than the release of negative news. Genentech had previously stated it would decide whether to advance T-DM1 into a registration trial during 2008, based on an ongoing phase II trial. This led many to believe that Genentech would use the ASCO platform to announce its intention to commence a phase III trial already this year. In the last day of the conference, when the market realized Genentech was not going to give the dramatic announcement nor was it going to release data from the ongoing phase II trial during the conference, the reaction was brutal.

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Immunogen and Seattle Genetics – On The Verge Of An Inflection Point

Thursday, May 22nd, 2008

 

This year’s ASCO annual meeting should be a very exciting event for anyone who has been following the field of antibody-drug conjugates (ADCs). During the conference, investigators will present impressive clinical data generated by ADCs powered by Immunogen’s (IMGN) and Seattle Genetics’ (SGEN) technologies. The data includes studies for Genentech’s (DNA) T-DM1, Seattle Genetics’ SGN-35 and Curagen’s (CRGN) CR011-vcMMAE .  These data will put ADCs on the verge of transitioning from a remote niche to one of the hottest areas in oncology.

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Micromet - Biting Cancer (Part I)

Tuesday, January 29th, 2008

    

Today it is clear that treating cancer with monoclonal antibodies is one of the greatest advancements in oncology. Just over a decade ago, the approval of Rituxan marked  the birth  of a multi-billion dollar market, as 8 additional antibodies have since joined Rituxan. The market is currently dominated by a specific flavor of antibodies termed “naked” antibodies, which represent a fraction of the large amount of  different antibody flavors. In contrast to naked antibodies, other flavors have yet to reach maturity,  although some of these are making their way steadily to the center stage. All these approaches have one thing in common: They rely on antibodies’ exquisite ability to recognize and bind a target in a very specific manner. One of these approaches, represented by Immunogen (IMGN) and Seattle Genetics (SGEN), deals with Antibody-drug conjugates (ADCs), which are constructed by linking antibodies to a drug-payload. The antibody serves as a guiding system by guiding the drug to tumors, and releases it inside cancer cells. In addition, there is a lot of activity in developing additional antibody-based therapies that involve linking other types of substances to antibodies. For example, one possibility for boosting an antibody’s potency is linking it to a radioactive molecule like in GlaxoSmithKline’s (GSK) Bexxar case.  

 

In biotech, just like in other investment fields, it is important to recognize market trends, and identify emerging technologies and concepts. The problem with such cutting-edge technologies is that, regardless of how promising they seem, there is always an unknown period of incubation, in which the  technology migrates from basic research to the industry. If we take the whole antibody industry as an example, it took almost a quarter of a century from the scientific breakthrough that gave rise to monoclonal antibodies, to the approval of Rituxan. In the case of ADCs, several encouraging results may imply that the incubation period is finally over, although drug development is always characterized with a high level of uncertainty. As someone who has been following the antibody market for quite some time now, I assumed that ADCs such as T-DM1 will represent the majority of clinical breakthroughs in the coming years. However, preliminary results from a small clinical trial that were published in ASH three months ago, showed that there is a unique platform which can generate highly potent antibodies, without even linking them to drugs or other effector molecules. In fact, this platform gave rise to one of the most potent antibodies ever tried on human beings -  Micromet’s (MITI) MT103.

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Immunogen at ASH 2007 – part II (AVE9633)

Wednesday, December 26th, 2007

   

Regardless of IMGN901’s specific case, the impression I am getting from all the scientific material I come across that deals with Immunogen’s (IMGN) technology, is that IMGN901 will probably be the last ADC (antibody-drug conjugate) powered by the cleavable DM1 linker. There are currently no ADC programs, except from IMGN901, that utilize this specific linker. As I mentioned in one of my SGEN’s (SGEN) pieces, Genentech seems to prefer a noncleavable linker for the majority of its ADCs. Another example may be, Centocor, who licensed Immunogen’s technology for arming a antibodies targeted against alpha integrin and evaluated both DM1 and DM4 cleavable linkers with the same antibody. Results from several animal experiments showed that the cleavable DM4 version was much more stable in the bloodstream and active in inhibiting tumor growth than the cleavable DM1 version.

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Immunogen at ASH 2007 – part I (IMGN901)

Wednesday, December 26th, 2007

At ASH (American Society of Hematology), Immunogen (IMGN) and its partners presented data on several projects including IMGN901(formerly known as HuN901) for Multiple Myeloma and AVE9633 for AML (Acute Myelogenous Leukemia) .

 

The company presented updated results from its  phase I dose escalation study in Multiple Myeloma patients who have failed prior treatments. IMGN901 was administered weekly for 2 consecutive weeks in a 3-week cycle, and the company reported results from 12 patients in 4 cohorts of 3. The evaluated doses were 40 mg/m2/week, 60 mg/m2/week, 75 mg/m2/week, and 90 mg/m2/week. Immunogen had previously published results for the two lower doses, which included one partial response (PR) and 2 stable disease (SD) in the 60 mg/m2/week cohort. In its ASH presentation, the company revealed that among the 6 patients who received the 2 higher doses (75 and 90 mg/m2), there was also one partial response in a patient at the 90 mg/m2/week cohort, although this patient had to drop out of the trial due to unrelated issues. Of note, the patient who responded at 60 mg/m2 is still on the study, after more than 10 months.

  

I must admit I expected results to be somewhat better, based on management’s remarks in several investor conferences. I wrongly concluded that if a company gets a partial response in 1 out of 3 patients who were dosed at 60 mg/m2, and claims to be very excited about the 2 higher doses, there would be at least one partial response in each cohort to generate a response rate of 33%. Nevertheless, these results are quite positive for two reasons. First, all patients who participated in this trial were heavily pretreated patients, who had already received more than four prior therapies. Second, IMGN901 demonstrated excellent safety profile as no severe side effects were documented. This means that additional patients can be recruited and receive higher doses, that might be more effective.

 

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