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Summer weekend fun: the chemistry of Tyrian Purple

6/29/2013

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In antiquity purple was the color of royalty.  Cloth dyed with the purple dye made in Phoenicia was highly prized throughout the ancient world.  It was colorfast (i.e. it did not  fade) and it was difficult to make and only available in small quantities.  Pliny the elder discuss the dye in chapters 60 to 65 of "The Natural Histories": 

"The most favourable season for taking these fish  is after the rising of the Dog-star, or else before spring; for when they have once discharged their waxy secretion, their juices have no consistency: this, however, is a fact unknown in the dyers' workshops, although it is a point of primary importance. After it is taken, the vein  is extracted, which we have previously spoken of, to which it is requisite to add salt, a sextarius about to every hundred pounds of juice. It is sufficient to leave them to steep for a period of three days, and no more, for the fresher they are, the greater virtue there is in the liquor. It is then set to boil in vessels of tin, and every hundred amphoræ ought to be boiled down to five hundred pounds of dye, by the application of a moderate heat; for which purpose the vessel is placed at the end of a long funnel, which communicates with the furnace; while thus boiling, the liquor is skimmed from time to time, and with it the flesh, which necessarily adheres to the veins. About the tenth day, generally, the whole contents of the cauldron are in a liquefied state, upon which a fleece, from which the grease has been cleansed, is plunged into it by way of making trial; but until such time as the colour is found to satisfy the wishes of those preparing it, the liquor is still kept on the boil. The tint that inclines to red is looked upon as inferior to that which is of a blackish hue. The wool is left to lie in soak for five hours, and then, after carding it, it is thrown in again, until it has fully imbibed the colour."

The fish Pliny is referring to is the Murex snail now called Bolinus brandaris.  One can imagine the smell of the dye works at Tyre as tons of shell fish fermented in the vats.  The rest of the mollusc was discarded when the hypobranchial gland (the vein Pliny was referring to). Zvi Koren has reconstructed the process and successfully dyed cloth using the ancient techniques.  

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This is the structure of the purple dye and interestingly it is showing up as an interesting lead in GSK inhibition. If you enjoy the weekend forays into the chemistry of antiquity let me know and I will make it a regular feature. 

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Part 3: In which a computational chemist and drug hunter, imbued with Leibnizian optimism proposes a way in which the pharmaceutical industry may be saved from it's self

6/19/2013

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Leibniz argued we live in the best of all possible worlds.  I realize that looking at what goes on around us causes pause at this statement, but ask yourself, what percentage of our problems are caused by human frailty and not an inherent conditional aspect of the universe as a whole.  I'll stop the philosophical meanderings now, and switch to my plan to fix the pharmaceutical industry.

First we must agree on some points.  Number one is that the pharmaceutical industry, while a business which exists to make money, is a very different business than others.  Why discover drugs when you could make tyres, or tacos? Presumably because you want to apply to scientific training to something that will help humanity in some small way. Consequently, point number two follows. Drugs are not tacos.  Creating a demand for drugs is inherently not the point of the business. Drugs that make a significant difference in peoples lives create their own market. Lipitor became a huge seller before all the massive market-creating direct to consumer advertising started.  Therefore we should strive to create drugs that solve problems that exist, not find a use for a drug that your have.

Point three is that all of the major blockbuster drugs were created before the merger mania.  it is impossible to be innovative in a crushing bureaucracy.  Just ask any of your Russian colleagues about being innovative in the Soviet Union. Consequently, the mergers need to be undone. Pfizer, Novartis, etc.  need to be broken up into smaller companies where a drug that produces $350 - $400 million in revenue would be significant enough to make a difference.  

A corollary to point three is that is drugs are not tacos, you can't let managment come from the same business background that is created in most business schools.  Research can not be viewed as an expense.  It costs about a billion dollars and takes ten to fifteen years to create a functioning research group.  Cutting, or shutting down a research site is equivalent to shooting your dairy cows for meat, or eating the seed corn. The steak may taste good, but when you realize you need milk, you will need to go buy cows that you really should already have.  

Pfizer has admitted that it can't do research and is looking around for innovative products from small companies that employ the scientists that Pfizer fired when they shut down all the research sites that they acquired in the mergers.  To quote a Pogo comic strip, "we have met the enemy and they are us!".

The problems in the pharmaceutical industry can be solved by reversing the results of merger mania.  Also require that the shut down facilities be turned over to a non-profit foundation (Hey Bill and Melinda Gates, I'm talking to you)  where companies can be incubated for free for a period of time.  Be very loose on the criteria to get in and get started and then do a two year review and be very harsh on the criteria to stay. Let the non-profit be involved in getting funding and make sure it has enough clout to keep the Harvard MBAs out. Let them then license the products out to recoup the costs.  Core functionality like scale-up, Preclinical and clinical research can be centralized so the scientists can focus on research. 

we have to get small or all we will have are 3rd generation Viagras and more invented conditions like "low testosterone".

I welcome feedback. Contact me, follow on twitter (@VictrixCMC).  Particularly if you are Bill Gates. 


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There were many pharmaceutical companies abiding in the fields, and they were well. Then several began to eat the others until they became so bloated nothing could satisfy them and they perished.

6/18/2013

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This graphic roughly shows the structure of the pharmaceutical industry when I joined it in the last gasps of GHW Bush's administration. There were 34 companies that were large enough to merit the title of big pharma.  In that legendary time, Merck was the largest raking in a cool $5.2 billion a year.  Pfizer was number 14 making $1.4 billion a year.  There were many blockbuster drugs on the horizon. I worked at American Cyanamid which was bought by American Home Products.  I left and went to biotech and watched as AHP shed the Cyanamid Agricultural Chemicals business and passed it off to BASF, closing the only agricultural chemical division that was making more money than the pharmaceutical division (Lederle Labs).  The the mass orgy of cannibalism began. As the graphic shows, 34 companies became 7. In 2011 Pfizer had moved to number one with a whopping $56.4 billion in revenues. Merck had dropped to #3 with a still huge $40.1 Billion in cash flow. Novartis which formed when Ciba-Geigy and Sandoz merged.  Ciba-Geigy, itself a merger of Ciba and Geigy. I guess Ciba-Geigy-Sandoz wouldn't fit on business cards, so a new creature emerged named Novartis. 

In the graph below, you can see that 39 drugs were approved in 2012, which is fairly large compared to previous years.  It is important to note that 14 of those were new biologics.  In 1990, 23 drugs and 30 the following year, 1991 were approved.  If you look at the graph at the bottom of the page, one obvious factor is that the cost of developing a new drug (chemical) has risen to $800 million in 2000 from $300 million in 1990.  The best estimate for last year was $ 1.8 billion for 2012.  So where are all those savings that were supposed to come from the consolidation of the industry?  Well, they obviously don't exist. 

One huge problem is that a company the size of Pfizer needs multi-billion dollar earning drugs and those are hard to come by.  They weren't a particularly innovative company so in the 1990s they went on a merger and acquisition binge that destroyed Warner-Lambert, Pharmacia-Upjohn, Wyeth.  All were much more innovative companies than Pfizer.  Pfizer dismantled the research infrastructure of these companies, turning out the chemists responsible for producing the blockbuster drugs, that they acquired the companies for.  Now what?  We have several Brontosauruses that can't find enough food to survive.  As we have learned from the housing crisis, that "too big to fail" translates into "too big not to fail".  The cost savings of mergers are paper economies.  Mirages of accountants ledger books. The industry was in much better health in the late '80s and early '90s that it is now.  What are the big guys doing?  Looking for innovation in the small company arena, buying the small companies, so they can get innovative products and destroy the culture of innovation that brought the new drugs in the first place.  

"Well, what is to be done?" you ask? I'm glad you did.  Fortunately, I am arrogant enough to believe I have the solution.  Tune in tomorrow for part three, in which I solve all the world's problems. 

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The House that Max Built, or Can One Reorganize Oneself to Greatness? 

6/17/2013

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Merck always was the epitome of what a pharmaceutical company should be.  Growing up, I knew about what a good company it was.  This reputation was largely based on the research organization that was built by Max Tishler. He led the teams that worked out the total synthesis of ascorbic acid, riboflavin, cortisone, miamin, pyridoxine, pantothenic acid, nicotinamide, methionine, threonine, and tryptophan. Tishler stepped outside his synthetic organic background and developed the fermentation processes for actinomycin, vitamin B12, streptomycin, and penicillin. Tishler also invented sulfaquinoxaline for the treatment for coccidiosis. This man basically invented the discipline of modern medicinal chemistry. He stands next to Paul Ehrlich in the discipline as one of those towering figures that looks down on the medicinal chemists of today.  I wonder if he would be pleased.

Now Merck's new head of research, Roger Perlmutter, has announced plans to revamp research at Merck with a plan that will involve cuts to R&D. I have no access to the organizational structure of Merck, or it's costs or infact any inside information. However, I do know that when a research organization has problems, it almost never resides in the foot soldiers who carry out the day to day research.  The choice of therapeutic areas, staffing, funding basically everything but the day to day research is a senior management problem. 

Bringing in a new head of R&D is a start, but laying off the researchers will do nothing to make the pipeline more robust.  The issues at Merck are deep.  The shareholders should consider the way the military handles problems with performance in the field.  They fire generals, not privates. If a division fails, the commander is gone.  They don't cashier 10% of the privates to make a "leaner more efficient" division keeping the chain of command intact. 

I firmly believe that no one has ever reorganized themselves to greatness.  I believe that this is why most organizations fail over time.  There is too much power in the upper echelons and the tendency to shift blame downward is too entrenched.  Even the shareholder activist investors, when they wrest control from an ossified senior management, gut the company to see how they can get the largest sum, for the best parts of an organization and the devil take the hindmost.  Tomorrow I will continue this thread with why I feel the merger and acquisition mania that has swept the pharmaceutical industry over the last two decades has caused this problem of weak pipelines and low levels of innovation.

4 Comments

I have seen the future of drug discovery and it's awesome

6/5/2013

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I am fortunate person. I really have a life filled with tremendous blessings.  My wife, who had cancer, is cancer free, healthy and starting her own business venture. When I was laid off, I had sufficient funds to start this consulting business, which is getting traction and attracting high quality clients.  

I am really impressed with one new client in particular: Collaborative Drug Discovery.  They truly are collaborative.  I have become involved with one of their collaborative efforts and am enjoying it tremendously. We had our first meeting on Monday and lets just say that people from all over the world were involved. While the jetpacks we were promised never materialized, we have something that makes them unnecessary. The true power of the internet is being realized.  We can communicate with people all over the world, work together, and securely share data all from the comfort of our homes.  

I have been able to assemble a computational chemistry work suite for under $2,000.  The negotiated software license agreements were easy to negotiate.  The ability of a decentralized team of experts to put together a dynamic program are now in place.  We are in a position to reap the benefits.  This is particularly important for my discipline.  Computational chemistry used to be expensive and require a company to hire a full time expert.  Now you can bring one on (me for example) and have the benefit of decades of experience for a reasonable price and only pay for the services you actually need.  Pretty cool, huh? I think so.  Distance is no longer a barrier.  I can work with anyone in the world. Web meetings make it possible to sit in on meetings in Moscow, or Brisbane.  Your can get project information and share results with people in Buenos Aires, or Naples. 

The future is here, and I like it!

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Science illiteracy, and one for the "Uh excuse me, did you really say that?" files. 

6/3/2013

3 Comments

 
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I stumbled across this gem of science the other day (hat tip to the Curious Wavefunction).  In this piece, a Dr. Mercola, rants against artificial sweeteners.  Now, I'm a water man, my self.  When I want something carbonated I reach for a high mineral content sparkling water, usually of Eastern European origin. However, I really don't think that the amount of various artificial sweeteners that is consumed in the United States, that any serious adverse event could be occulted. That isn't the worst part! The good doctor says Sucralose is closer to DDT than sugar.  It was at this point I began to envision Sterling Hayden telling Peter Sellers, in Dr. Strangelove, how the International Communist Conspiracy was corrupting our precious bodily fluids through fluoridation.   

Take a look, you don't have to be a Ph.D. Chemist to see that the only similarity is that one chlorine atom.  Ye Gods! He claims to be a Doctor of Osteopathic Medicine.  I have met several who are perfectly normal physicians.  So I don't know what is up with this, but it's scary.  I hope he is just ignorant, and not purposely spreading disinformation.  There is enough chemophobia out there.  Stuff like this has only one cure: education. We chemists have been particularly bad at popularizing our discipline.  We have no Carl Sagan, Neil de Grasse-Tyson, and the like.  Perhaps chemistry lacks the breathtaking awe of the cosmos, but we really need to try.  Who is with me?  If you are a chemist and are interested in trying to get involved in popularizing our discipline, contact me. Email me or fill out the form and let me know.  This level of ignorance is frightening. I really want to take a crack at doing something to popularize our discipline.  This is our call.  Join me!

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    Adam Kallel Ph. D.

    Our CSO sounds off about drug discovery, computational chemistry and history

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