Showing posts with label south african medical journal. Show all posts
Showing posts with label south african medical journal. Show all posts

Monday, January 21, 2013

Thanks to SAMJ (the SOUTH AFRICAN MEDICAL JOURNAL), we can learn of first published guess as to penicillin's chemical structure

SAMJ : the South African Medical Journal
So much has been written about the earliest days of trying to determine the chemical structure of pure penicillin, in such truly massive tomes like "THE CHEMISTRY OF PENICILLIN" and "ANTIBIOTICS,VOLUME II", and much more delightfully in John Sheehan's lucid-but-learned "THE ENCHANTED RING" , that there seems little more to add.

But that is not so, thanks to the South African medical journal SAMJ and its enterprise at putting all of its over 100 years of back issues online and free to access.

It is little known that Karl Meyer, the chemist on the tiny pioneering Columbia university team ( the first ever to use penicillin as an antibiotic), contributed an unique intellectual portion to Henry Dawson's first presentation on penicillin.

This presentation was delivered in Atlantic City, at the 33rd annual meeting of the American Society for Clinical Investigation, ( the famous "Young Turks" ) May 5th 1941 --- attended by top medical researchers from all over the world and covered by the scientific and popular media.

To add to the journalistic fun, their more senior and sober counterparts, the American Association of Physicians, met the very next day in the same place - and the two generations of doctors didn't always agree on everything, naturally .

Most penicillin historians seemed to have limited their knowledge of this seminal event to the New York Times report on it, easily available anywhere on microfilm.

But the official abstract of Dawson's presentation , formally published in the Journal of the Society in July 1941, mentions - in passing - two important subject areas that all the popular media left out in describing Dawson's paper.

His presentation talked of the methods of preparation ( and importantly made it clear this took place in Dawson and Meyer's hospital lab and not in some drug company lab), without saying anything more.

 Fortunately later articles do amplify on the earliest methods of growing and extraction in great detail.

But the precis also indicates that information as then known of penicillin's chemical nature , ie known as of late 1940-early 1941 , was discussed --- without saying what was speculated.

This speculation is NOT repeated in any later article, because this early speculation was not even close to penicillin's final chemical structure, as found with the help of hundreds of chemists, five long gruelling years later.

But, while I am not a chemist, I think I can say it wasn't a bad guess for what was known - almost by sight and smell - about the earliest dry penicillin powder.

Thanks to SAMJ, the South African Medical Journal


But back to SAMJ - because it was all down to one of their most enterprising correspondents , H O Hofmeyr, that we know anything at all about the earliest chemistry of penicillin.

Hofmeyr came from a very politically powerful Afrikaner family and so it is not surprising he was sent abroad, during WWII, to be South Africa's scientific eyes and ears in places like Washington DC.

He wrote a very complete diary of his visit to the Clinical Investigators annual meeting and it was published, in full ,in the September 1941 monthly issue of SAMJ.

I think I remain the only one to ever cite Hofmeyr's eyewitness report on the opening of the Age of Antibiotics.

I have always treasured his report on Dawson's paper , partly for his slightly snide tone relating that this particular paper caught the imagination of ("sniff") the ("popular") press who gave it ("lurid") headlines like 'Giant Germicide Yielded by Mold'.

But in addition, Dr HO ( as everyone called him) correctly noted in 1941 what current historians always, always miss : that Dawson's use of penicillin on subacute bacterial endocarditis, the dreaded SBE, was in some ways, highly conventional.

Hofmeyr said it still remained in 1941, the absolute "acid test" for the claims of every new potential chemotherapeutic agent.

But buried in middle of the paragraph, Hofmeyr indicates that the Columbia team is willing to speculate publicly that penicillin seems related to the hydroquinones.

The hydroquinones are a big family best known for their use in photo developing and skin whitening, but one in particular, paraquinone ,strikes me as looking, smelling and acting rather like early penicillin powder.

Yellow , arid penetrating smell, very sensitive to acids and bases, yes it sure does look, smell and act like early penicillin.

But paraquinone has only has about one third the molecular weight and number of atoms that penicillin has (and was thought to have in 1941) so it would have to be quite an elaborated version to fit the known facts.

WE have to wait to 1942 and the much better known journals such as NATURE and SCIENCE to find the next set of informed guesses as to penicillin's structural nature, but thanks to SAMJ, we have recovered an important fragment of medical history .....

Dawson's DIY penicillin a postmodernist "shot across the bow" of Modernist Big Pharma

Two hundred years from now, only the first of the Dawson team's many articles on wartime penicillin will still be cited and still considered seminal.

This, despite the fact that Nova Scotia-born Henry Dawson's last penicillin article told a surprised world that invariable fatal subacute bacterial endocarditis (the much dreaded SBE) had finally been cured - by his penicillin method that he had pioneered 5 years earlier.

But instead it is Dawson's first penicillin first article, the "impure but non toxic" article of May 5th 1941, that had (and continues to have) ramifications beyond any one disease, ramifications indeed beyond even medicine and science itself.

In that article, delivered before a large group of international medical researchers in Atlantic City and widely reported by the popular and scientific media from The New York Times to the South Africa Medical Journal, Dawson deliberately paired and then contrasted two oxymoronic phrases.

But first, recall that Dawson chose to appear in front of all his peers to praise his new drug to the heavens AND announce that it had no therapeutic effect on a series of four SBE cases in a row.

Trust me on this one : normally scientists do not rush to the biggest conference in town to proudly announce repeated failure.

But it wasn't the lack of therapeutic success from his impure natural penicillin that Dawson was really so eager to announce.

Rather it was the lack of toxic effects from his crude homemade mixture of natural penicillin and its natural impurities that he was so proud (and perhaps amazed) to announce.

(In a sort of 'reverse Ivory Soap', his starting penicillin brew was far less than 99 and 44 100th percent impure :  pure penicillin made up only one part per million of his mixture !)

It could have had - perhaps even should have had - a highly deadly mycotoxin  poison buried somewhere in that fungus mix, but God took pity on Humanity and it did not.

We do not have a complete version of Dawson's report and ad lib comments , only various precis. But assembled together, I believe we can garner Dawson's actual words and phrases used to prescribe his main intent behind this article.

He described how his tiny team made their hospital-grown crude (impure) and natural penicillin, calling it both more potent and much less toxic than the factory-made chemically pure synthetic sulfa drugs, less potent and more toxic, made by Big Pharma .

His takeaway line, as the CBC's Don Connolly likes to say, is that "despite being impure, homemade natural penicillin was actually less toxic and much more potent than factory-made pure synthetic sulfa drugs."

"Living better chemically ?"


Today, in this postmodern age,  this statement might hardly seem controversial ; but in 1940, at the apogee of Modernity, to diss the Du Pont slogan of "living better chemically" was to indulge in sheer heresy.

At the same university as Dawson (Columbia) and at the exact same time, famed German-scholars-in-exile Adorno and Horkheimer were busy dismantling 500 years of Modernity, brick by brick, and patiently reassembling them as Postmodernity.

Perhaps posthumously, their fellow university colleague Henry Dawson can lay claim to being among Postmodernity's first scientific converts.....