Thumbs-up to the bloggers who post regularly. It is not as easy as it appears, especially after holidays – good thing I decided to get a degree in the biological sciences instead (?!).
Hard to believe, but ASCO has arrived. Thousands of people are migrating to Chicago this weekend to finally learn what all those abstracts really mean. Much has been written and said about the latest cancer therapeutics in anticipation of the meeting and it is now time for the unveiling. Plenty of smart commentary and analyses will be written over the next several days by those who are actually at the meeting, so I am looking forward to seeing what nuggets they feel compelled to share.
So, instead of cutting edge cancer research with new molecules and pathways, I thought I would take a look at the opposite end of the drug development spectrum and look at companies that tweak existing FDA approved drugs. There appear to be at least two distinct models, those that re-purpose and those that look for improved profiles/delivery.
Several companies have gone the re-purposing route, looking for new applications/combinations for existing tried and true drugs. Some examples include Nuedexta (quinidine/dextromethorphan; $AVNR), Vimovo (naproxen/esomeprazole; $POZN/$AZN), Silenor (doxepin; $SOMX) and Contrave (naltrexone/buproprion; $OREX). While interesting and cost-effective, this approach does not appear to have translated into commercial success.
There was a recent posting on Seeking Alpha from Martin Shkreli highlighting the Top10 slowest pharma launches and surprise, surprise, three of these were on the list. There are rationale hypothesizes for the lack of traction: Nuedexta is challenged by the unfamiliarity of disease by clinicians (pseudobulabar affect), patients can take cheap generics instead of Vimovo, and Silenor, well, it is just another sleeping pill, isn’t it? Contrave is a bit different in that it has not been approved by the FDA and the odds for approval look grim. All in all, this strategy does not appear to have been a homerun, thus far.
(Anybody know which re-purposed products/combinations have had the best launches?)
Other teams have looked to lower risk drug development strategies by seeking more straight-forward paradigms by improving delivery, PK profile, or other similar characteristics. While many of these companies are not too exciting ($BDSI and $ANX come to mind), I came across two companies, which peaked my interest: Raptor ($RPTP) and Unigene ($UGNE).
$RPTP believes they have made significant improvements in cysteamine delivery by developing a delayed release q12h formulation. Its predecessor is Cystagon, an immediate release cysteamine given q6h. It is used in patients with nephropathic cystinosis, an inherited metabolic disease with orphan drug status, which is fatal in childhood if left untreated.
The primary benefit to this new formulation is to not having to wake up growing toddlers and kids in the middle of the night to take a unpleasant tasting medicine. Other potential advantages include a 30% lower daily dose than Cystagon, resolution of GI distress, nausea, and vomiting and the potential for reducing complaints of bad taste and halitosis (Roth conference presentation, March). Improved quality of life plays a major factor here.
Assuming positive P3 data, they plan to follow $BMRN’s model, and charge $70K/pt/year. $RPTP estimates that there are 500 patients in the US (2000 ww), so maximum US sales would be $35M, with 100% adoption. Curious to know the number of patients currently being treated.
How does pricing that compare to Cystagon? A Google search found this price: $1200 for 500 x 50 mg tabs (anyone have more reliable pricing from RedBook or other source?). Cystagon is dosed by weight, so for someone who weighs more than 110 lbs, 500 mg q6h is the recommend dose. Next, math. 2,000 mg daily = 14,000 mg weekly = 280 pills/week = 1,204 pills/mo = 2.4 units/month = $3,000 monthly = $36K yearly. Thus, this new formulation could cost 2x more than Cystagon. But, for a grand total of 500 potential patients, I can’t imagine payers making too much of a stink over this, especially if kids are involved and with potentially better outcomes.
Just a few weeks ago, they were valued at $109 MM (32.5M shares (3/31/11) x $3.36/share (5/11/11), but after a typical “run-up” into pivotal data (expected end of this month), they now have a $187 MM market cap at $5.76/share (6/3/11); or $263 MM (fully diluted) and seem a bit rich to me. I’m thinking more about the FD number because of the run-up, but do need to check strike prices.
In addition, with just $12.9M cash at the end of May (estimate based on $16.5M cash (2/28/11), burning $1.2M/mo) and an S-3 filed to raise an additional $50 MM, it gives me a bit of time to research a bit more on NASH and look for alternative entry points.
$UGNE has embraced a different approach and hopes to hang their hat on oral peptide delivery. In particular, they are looking to convert subcutaneous delivery of calcitonin and parathyroid hormone (PTH) into oral delivery and improve compliance (perhaps efficacy, as well). Both agents are used in the treatment of osteoporosis and must be injected on a daily basis (note that calcitonin can also be delivered intra-nasally).
Oral delivery of peptides are typically hampered by low absorption and degradation in the gut. According to the company, their technology does four things: 1) an enteric coating prevents digestion in the stomach at low pH allowing transit to the small intestines; 2) the enteric coat dissolves in the small intestines; 3) protease inhibitors, permeability enhancers and peptide are released; and 4) the peptide is absorbed across the intestinal wall via paracellular transport.
There are partnerships for oral calcitonin with Nordic Bioscience (through Novartis) and Tarsa (funded by MVM Life Science Partners, Quaker BioVentures, Novo and $UGNE). There is also a partnership for oral PTH with GSK. These partnerships lend some credibility to the technology.
But more importantly, in March, Tarsa reported a positive P3 controlled trial (ORACAL) showing non-inferiority of oral calcitonin to nasal calcitonin spray in increasing bone mineral density at the lumbar spine after one year of treatment. This should bode well for their P2 oral PTH program, which could report controlled data (vs. placebo and Forteo, injectable PTH) in Oct/Nov this year.
Just a note, calcitonin is a single, linear 32 amino acid peptide, while PTH is a 42 amino acid, that needs to dimerize (84 amino acids total), so size permeability and functionality remain of concern.
With a $97M market cap (92.5M shares (4/26/11) x $1.06/share (6/3/11)) and cash through 2012, this could be a sleeper. Just beware, this is a bulletin board stock and volume is light.
No positions at present.