Bayblab

An Inconvenient Sponsor?

2010-01-08T11:29:00.004-05:00

GlaxoSmithKline is going to finance a documentary about obesity. A good documentary on obesity is probably overdue and has the potential to be very interesting to me. An article in the New York Times has some more details about the movie and the controversy around Glaxo as a financial backer and the potential for this documentary to be disguised infomercial for Alli, Glaxos over the counter weight loss drug. You may know alli from it's famous side-effects. Excreting dietary fat can get ugly.
The comparisons to An Inconvenient Truth from the NYT article are interesting since obese people serve an important role as a carbon sink.

Darwinian Evolution of Prions

2010-01-02T23:22:00.003-05:00

Here is an original article describing the phenomenon of prion evolution in Science magazine. It would seem that this is the first example of evolution that is distinct from genetics. I haven't read the article in detail but cjdblogger has a decent summary.

Cancer Carnival #29

2010-01-01T19:47:00.000-05:00

Happy New Year, and welcome to the first Cancer Research Blog Carnival of 2010. It will be a light one - the holiday season kept us all busy - but there's still some good stuff to be had. We also have some new hosts lined up in the new year starting next month at Health and Life.

In fact, we'll kick things off with a post from that blog, comparing Tamoxifen to Arimidex as adjuvant therapy for cancer.

There has been a lot of debate about how to prevent cancer from coming back in post-menopausal women after initial treatment. We discussed in our comparison of Tamoxifen with aromatase inhibitors the debate in general, and now will analyze Tamoxifen vs Anastrozole, brand name Arimidex, directly.

The author, David, does a nice job of summarizing various studies comparing the two drugs. The blog itself features a large amount of cancer blogging, much of it from a pharmacological point of view and looks to be a nice resource for health information in general, and drug uses and side effects specifically.

Next up GeriPal responds to news stories that morphine and other opiates may promote cancer growth and spread with some research blogging

This is an interesting line of research and one that gave the makers of Relistor a shot in the arm (as one website put it – “a possible new indication for Progenix's Relistor could revive its fortunes”.) I find the pathophysiology behind this incredibly interesting from an academic standpoint, however it is neither something that would warrant such dramatic headlines nor spur thoughts that it is anything but research in its infancy.

As usual, the headlines don't tell the full story, but GeriPal has it, so click through to find out the real deal.

Something we don't often think about while focussing on human disease is cancer in animals. PetPip reminds us that pets get cancer too, and how to cope.

Speaking of animals with cancer, one favourite from past carnivals has been the transmissible tumours among tasmanian devils. A recent paper in Science has determined the origins of these tumours, as Carl Zimmer describes in the New York Times

When the tumor disease was discovered, many scientists assumed that it was caused by a rapidly spreading virus. Viruses cause 15 percent of all cancers in humans and are also widespread in animals.

But subsequent studies failed to turn up a virus. Instead, Anne-Maree Pearse and Kate Swift, of the Department of Primary Industries, Water and Environment in Tasmania, discovered something strange about the tumor cells. The chromosomes looked less like those in the animal’s normal cells and more like those in the tumors growing in other Tasmanian devils.

The full story is pretty fascinating, and worth the read. Razib Khan at Gene Expression adds a bit more, commenting on the dire predictions for the devil's demise and pointing out that some animals are, in fact, immune.

That's it for this month's Cancer Research Blog Carnival. For older editions, visit the Carnival Homepage. Don't forget, the CRBC has subscription options; you can follow by email or RSS feed. An aggregated feed of credible, rotating health and medicine blog carnivals is also available.

Get that Pfizer out of my CIHR

2009-12-23T12:57:00.004-05:00

I was surprised to have been so much out of the loop when I learned on the CBC radio show "The Current" that one of the Pfizer VPs had been appointed to the governing council of CIHR (our main health funding agency). Now I love to hate on Pfizer as much as the next guy, especially since one of my good friends works there, and I'm not a huge fan of off-label uses of drugs. But this really made me raise an eyebrow. The thinking behind the decision to appoint Dr Prigent was to bring "much needed" commercialization expertise to CIHR and to help "align the interests of CIHR with those of the pharmaceutical industry". This is not my interpretation of the facts but a direct quote from Dr. Prigent. Now I was under the impression that the mandate of CIHR was to improve the health of Canadians by promoting scientific discovery, not to commercialize products or post better quarterly results. I fully understand that discoveries need to be turned into products in order to reach patients, but I'm not sure that this is the imperative of CIHR. Now most people sitting on the governing council have a conflict of interest, because they stand to gain from getting more funding to their home institution, but I'm afraid this is the beginning of a shift towards more corporate regency over funding focus. Even our neighbours to the south don't allow that. I'd love to hear arguments for increased focus on commercialization in the comments, but If like me you think there is too much potential for conflicts of interest you can sign this petition...

Mosquito laser death

2009-12-22T22:26:00.003-05:00

Quick bayblab link to an article about geniuses who utilized the awesome power of lasers to combat the most annoying insect. (I don't know how I missed this, it's old news.).
Could you imagine if these things become consumer grade!?! I hope it comes with a smoke machine to enhance the lasertastic spectacle of burning mosquitoes.

Death from the Skies!

2009-12-21T12:22:00.000-05:00

We're all going to die. Not in 2012. Not any time soon for most of us. But eventually something catastrophic will happen and life, indeed the Earth, as we know it cease to exist. Luckily, since nobody reading this will likely be around to witness it, we have bad astronomer Phil Plait to explain how it will all go down.

Plait walks us through several doomsday scenarios from extinction-causing impacts to being cooked by cosmic rays to encounters with alien life. In each case, the reader is given the basics to understand the disaster being explored, a detailed explanation of how it might happen, how the human race might prepare for or prevent the particular destruction (if at all) and odds of it happening.

This is first and foremost a science book, and Plait delves into the physics and astronomy with vigor. What exactly is happening at the centre of a star? How is a black hole formed, and what would happen if we fell into one? While some of it might be daunting, it's all written in an easy-to-read and engaging style, that at times feels more like reading good science fiction than science fact. Each scenario is prefaced with a vignette of how it might look if you were caught in the middle of it, and even the cover evokes warm memories of old sci-fi B-movies.

Death from the Skies! may be one of the best science books I've read. Educational and entertaining, it's a must read if you have any interest in astronomy and astrophysics - and possibly even if you don't.

The universe is a harsh and violent place, and sooner or later it will get us. Phil Plait teaches how it will happen, and somehow makes you wish you'll still be around to witness it.

Death from the Skies! by Philip Plait

It's beginning to look a lot like Christmas...

2009-12-17T11:44:00.003-05:00

... but only if you look very, very closely.

Scientists in the UK have made a tiny snowman, one-fifth the width of a human hair.

The micro man is more Tin Man than Frosty though, built with two tiny tin beads, a platinum nose and ion beam etched features.

See here for the story.

[h/t: a loyal FoB]

The Geeks' Guide to World Domination

2009-12-16T15:14:00.004-05:00

While not actually giving tips for world domination, The Geeks' Guide... by Garth Sundem is an interesting book for the trivially minded. Within its pages, it contains 314(.1516?) short entries about pop-culture, science, brain teasers and other geekery ranging from useful Klingon phrases to how to balance a chemical equation. It's essentially a bathroom book - something you can grab and open up to find an interest fact or list.

The downside (there's always a downside) is that over the course of reading it I caught at least 3 factual errors. Granted, one I wouldn't have noticed if it hadn't come up in a recent round of pub trivia, but another was an obviously imbalanced chemical equation and the third was something any self-respecting geek should know.
And mistakes are pretty much a fatal flaw for what is essentially a trivia book.

Now saying one wrong thing (or three) doesn't make everything in the book wrong. However trivia, whether in a book or contest form, attracts people (myself included) who get caught up in the details and pride themselves on getting them right. I've been to more than a few trivia contests that have featured heated debates, either amongst teammates or with the quizmaster, over minutia. (The irony being that that trivia is, well, trivial and not worth heated argument) The attitude is summed up in a quote notably missing from The Geeks' Guide's quotable Futurama: "[Y]ou are technically correct – the best kind of correct!"

So if you're one of those people who will be bothered finding one or two errors in a bathroom reader (or not finding them, but knowing they're there) it's probably best to skip this one. But if you can overlook some minor mistakes to find out how to load a pair of dice, learn tongue twisters in foreign languages or discover a quick trick for dividing by 7 then it might be worth checking out - at least for those moments when you're on the can.

The Geeks' Guide to World Domination by Garth Sundem

Some of the entries, and some not in the book, can be read at the author's blog.

Help Contribute to a Scent-free Workplace

2009-12-14T17:30:00.002-05:00

I was lamenting the nightmare that is Christmas shopping when I was sent a link to a great potential gift: Flat-D or flatulence deodorizer. It's as though it was designed specifically for my family! The Flat-D is piece of cloth worn inside your undergarment containing activated charcoal. From the website:

Activated charcoal cloth was originally developed by the British Chemical Defense Establishment as a highly efficient filter medium for protection against nerve gas and other highly toxic vapors that might be used in chemical warfare.

Protection against toxic vapors? Sounds like the perfect solution to flatus odor. But does it work? The gasses responsible for malodorous farts are mainly - but not exclusively - sulfur compounds, which should readily adsorb to the activated charcoal, but it's been shown that ingesting charcoal is ineffective (and probably doesn't taste great either). Charcoal textiles, on the other hand, can reduce the escape of sulfur compounds significantly - full briefs capturing virtually all of it, and pads like the Flat-D up to 77% effective (charcoal seat cushions don't help at all). The best part is the Flat-D, like other charcoal textiles, is washable and reusable.

If roasted chestnuts, egg nog and other holiday cheer threaten to turn your holiday festivities into the eleven pipers piping, this may be for you.

"Remember you can hide the sound of a fart by making a louder noise, but you cannot hide the odor of flatulence."

In an Octopus's Garden, In the Shade

2009-12-14T13:01:00.004-05:00

Octopuses (apparently not octopi) are smart and have been shown to be able to complete problem solving tasks. Recently they have even been shown to potentially use tools - with one species carrying coconut shells to use as a makeshift shelter should the need arise. Check out this cool video of the behaviour:

Speaking of food...

2009-12-08T23:27:00.002-05:00

Check out these awesome science-themed cookies, including some recipes and instructions.

These cookies look great, and now you can finally eat that delicious looking agar.

[h/t: Pharyngula]

In Defense of Food

2009-12-08T13:02:00.003-05:00

I've enjoyed the writing of Michael Pollan in the past, mainly his column in the New York Times Magazine. He writes eloquently and interestingly about food. In Defense of Food is my first experience with his book-length writing.

The book itself is summarized succinctly on the cover: "Eat food. Not too much. Mostly plants." It sounds like reasonable advice, and inside he makes the case for the pithy slogan. He argues that much of what we eat is not food and attacks the Western Diet and the nutritionism movement that focuses on individual compounds and not on whole foods. He describes what he calls "The American paradox": despite a preoccupation with health and nutrition, the US increasingly unhealthy, and proposes some dietary changes to address that fact, elaborating on the cover's mantra. (There's no reason to think this doesn't apply to Canadians as well)

Unfortunately, this book got under my skin right from the start. From the beginning, there is an anti-science tone, even putting the word in scare quotes, "advising you to reject the advice of science and industry" and arguing that current limitations of scientific understanding mean it's not enough to go by when deciding what to eat. Well, if not science then what? "Tradition and common sense" is the answer. That sounds good, and may even be a reasonable starting point but outside scientific rationalism, tradition and common sense can lead down the path to pseudoscience. And we see this fairly often with unproven traditional medicines that "have been used for thousands of years!"

In fairness, he's mostly speaking about science in a narrower sense and uses some science to back his arguments, but the opening tone feels otherwise. The real science he's attacking is reductionist nutritionism, the kind of thinking that gives us 'trans-fats are bad', 'eat more omega-3s', etc., distilling food down into more basic elements. It's not hard to be frustrated by reports of what's good or bad for you changing seemingly daily, and he makes a reasonable case for rethinking that approach. Unfortunately, this poses another problem for Pollan. He attempts to debunk nutritional science but at the same time depends on it to support his own arguments about what kind of food we should be eating. The inconsistency is obvious, and Pollan himself is aware of it. He does attempt to address this problem, but never really succeeds at doing it satisfactorily (at least for me).

This isn't the only logical flaw in his thesis. He appeals to tradition, but what gets traditions started? How did our ancestors know what works and what doesn't? How do we figure it out to start new traditions? Trial and error is one way, and historically possibly the main way, these things have been worked out. For example, one complaint is that our bodies aren't used to the new Western diet and its manufactured foods, we get sicker because of it (eg. increased rates of obesity and diabetes) and we should move back to eating "real" food. This may well be true, but as he also notes, the same thing happened when cow (and other animal) milk was introduced to the human diet. Now, milk seems as natural and wholesome a food as any other, but would Pollan have argued against milk as a food if he were around back then? "We've adapted!" seems like a probable defense, but how do you adapt or learn or improve without trying new things?

While this all seems quite negative, the book was interesting and easy-to-read, even if some of the support for the thesis had holes. Despite some flawed argumentation, In Defense of Food does offer some food for thought regarding our philosophy towards food - what it is and how to think about it - even if you walk away not agreeing.

In Defense of Food by Michael Pollan

Really bad trips

2009-12-05T11:46:00.001-05:00

There some pretty obvious consequences of recreational drug use, including physically debilitating consequences. Typical consequences are usually thought to be the result of chronic use, addiction and/or overdose. (Check out "Faces of Meth.") There are, however, less typical examples of the consequences of drug use.

The first example that I found quite interesting is hallucinogen persisting perception disorder (HPPD), which sounds like it could be extremely inconvenient. After as little as a single dose of LSD, psilocybin or related hallucinogenic drugs, symptoms of visual aberrations persist. Hallucinating for the rest of your life takes the fun out hallucinations. Sufferers of HPPD also can distinguish what is a hallucination and what is real ie. they have pseudohallucinations, which sounds even less fun.

The second example involves a illicit synthetic opiate drug called (1-methyl-4-phenylpiperidin-4-yl) propanoate (MPPP).
From an article in TIME magazine:
When George Carillo arrived at the Santa Clara Valley Medical Center in San Jose one steamy July day in 1982, he seemed more a mannequin than a man. The 42-year-old heroin addict was bent over and twisted, drooling and unable to speak; almost every muscle was immobilized. No one knew what to make of his condition, so a call went out for Dr. J. William Langston, the hospital's chief neurologist. Langston took one look and was amazed. Carillo's symptoms suggested that he had been suffering for at least a decade from Parkinson's disease, a nervous system disorder that causes tremors and a gradual loss of mobility. But that hardly seemed plausible: Parkinson's rarely strikes anyone under the age of 50.

Using stiffened fingers to scrawl answers to doctors' questions, Carillo managed to provide a few clues. The symptoms had come on suddenly after he and his girlfriend, Juanita Lopez, 3l, had tried a new synthetic heroin. Though the drug had caused an odd burning sensation when injected and hallucinations, they continued to use it for three days; two days later both had frozen into living statues.

During the manufacture of MPPP the related MPTP can be accidentally produced. MPTP in the body is converted to a neurotoxin which is selectively causes neuronal death in dopaminergic cells. This selective toxicity causes the hallmark Parkinson's symptoms. This drug has been now used extensively to study Parkinson's and create animals models of this terrible disease. It also hints that an environmental toxin may contribute strongly to early onset Parkinson's. The possible causes of Parkinson's is extremely interesting and warrants a separate post.

There is a book available, "Case of the Frozen Addicts" and a NOVA documentary of the same name about MPTP victims. There are at least 3o0 people in California who have used this drug. I can't find a download or streaming of the NOVA episode unfortunately.
Of course, medically prescribed drugs can have some extremely bad permanent effects, but hopefully in that case there is a professional who knows the drugs and what to look out for. Also recreational drugs are done on a self dosing schedule and, especially in the case of addition and/or dependence, one might loose perspective on symptoms of damage and subsequently an appropriate dose.

Cancer Carnival #28

2009-12-04T16:23:00.002-05:00

Welcome to the Cancer Research Blog Carnival #28, and the final edition of 2009. We have a full slate of editions open for hosting in the new year, so send us an email at bayblab@gmail or leave a note in the comments.

First up LabRat has some nice research blogging on the motility of cancer cells.

In order to break away from the neoplasm and spread the disease cancer cells must gain motility. Studying how cancer cells move can be difficult in vivo because the conventional method of immuno-histology (which involves taking slices out of a tumour during development then fixing and staining them) prevent movement all together. Newer work has been done using Intravital imaging [...], where a fluorescently-labelled tumour is generated in an animal and then observed while the animal is anaesthetised.

Lab Rat discusses some of the findings, and the difference between single cell and group motility.

Next our friend Alexey at Hematopoiesis has a review of a couple of papers that discuss the stem-like qualities of T-cells. How does this relate to cancer? He explains:

Because adult stem cells, cancer stem cells and self-renewing T-cells share common features (chemoresistance, quiescence…) chasing for efficient killing of the cancer we can also kill memory T-cells and shut down long-lasting immunity after therapy. Bad news.

Bad news indeed. But it is followed up by good news, so head there to read it.

Cancer screening - always an interesting topic as detection techniques get more sensitive - was discussed over at Scienceblogs recently, spurred on by new recommendations for breast cancer screening. Orac at Respectful Insolence kicked things off:

No, I wasn't surprised that recommendations to scale back mammographic screening were released. I saw it coming, based on a series of studies, some of which I've discussed right here on this very blog. What surprised me is how much of a departure from current mammography guidelines the USPSTF recommendations were and, even more so, that they were released this year.

It is a lengthy post, and worth the read for the details of the changes and the reaction of an oncologist. The recommendations call for a reduction in mammography (and self-examination) based in part on potential harms such as overdiagnosis and unnecessary biopsy. Greg Laden has a different point of view

It seems to me that the solution being recommended is this: Let's have less information at hand so that we don't fuck up our use of that information. If we don't have information that we can misuse, then we can't misuse it.

Finally, Mike the Mad Biologist discusses what happens when woo-ism meets cancer prevention wherein he discusses clinical trials of drugs which halve the risk of breast cancer. Yet they aren't embraced with enthusiasm.

I could understand if you tried the medication, and you felt lousy. Somehow, I don't think "a spiritual element" is going to halve the probability of breast cancer. (Before anyone thinks I'm picking on women, men seem just as idiotic regarding prostate cancer prevention--which has a much lower survival rate). But people who are frightened will engage in activities that lend the illusion of control (there is little conclusive evidence that diet can significantly lower breast cancer rates in older women*). The terror of knowing that there's is a one-in-five chance of getting cancer, combined with the knowledge that, even with medication, there is still a one-in-ten chance of getting cancer has to be terrifying.

That's it for this month's Cancer Research Blog Carnival. For older editions, visit the Carnival Homepage. Don't forget, the CRBC has subscription options; you can follow by email or RSS feed. An aggregated feed of credible, rotating health and medicine blog carnivals is also available.

Brain, Thinly Sliced

2009-12-03T15:11:00.003-05:00

This is a long day in the lab:

We are slicing the brain of the amnesic patient H.M. into giant histological sections. The whole brain specimen has been successfully frozen to -40C and will be sectioned during one continuous session that we expect will last approximately 30 hours (+ some breaks and some sleep in between). The procedure was designed for the safe collection of all tissue slices of the brain and for the acquisition of blockface images throughout the entire block.

Live video of the brain sectioning can be seen here. The brain in question is that of Henry Molaison who had parts of his brain removed to control epileptic seizures, and ended up not being able to form new memories.

Last Call for Cancer Posts

2009-12-03T09:16:00.001-05:00

The Cancer Research Blog Carnival will be here tomorrow, so this is your last chance to send in any of your cancer writing from the past month. You can use the form here.

Scientific peer review

2009-12-02T10:57:00.000-05:00

Good Head

2009-12-01T12:01:00.008-05:00

Go to the pub, and you'll undoubtedly find people gingerly pouring from a pitcher trying to minimize foam and acheive a headless beer. This despite the fact that many beer glasses, particularly special glasses for premium beers, have a volume marking that allows for half an inch or more of frothy goodness. Which way is better - thick head or no - is a matter of taste, quite literally.

Beer is a delicious glass of chemistry and biology, and the bubbles can be natural or artificial. For the most part, the bubble forming gas is carbon dioxide, which causes bigger bubbles and a 'fizzier' beer. CO₂ can be artificially introduced by dissolving it under pressure, or it can be naturally formed as a byproduct of fermentation by the yeast.
Some beers, like the Guinness family of brews, use nitrogen or a CO₂-nitrogen mix either as a widget in the pacakged product or to draw the liquid from a keg. These bubbles are smaller and result in a denser head, less effervescent beer and the distinctive 'creamy' texture. Even without foam, the gas involved influences a beer's flavour. Dissolved carbon dioxide forms the weak carbonic acid, affecting the acidity of beer and therefore its taste.

Obviously the bubbles at the top of the beer aren't just gas - there's something holding them together. Lasting bubble formation requires a surfactant, a molecule with both hydrophilic and hydrophobic parts, like the lipids in soap. Ironically, even trace amounts of soap residue in your beer glass can kill the head. As the gas bubbles in your beer rise, they pick up a number of molecules. One of the more important molecules is lipid transfer protein-1 (LTP1) (pictured). This protein is present in barley, but is not surface active until denatured by the boiling of the unfermented liquid (or wort). This protein is so important for foam stability - and foam stability is so important for the beer drinking experience - that German scientists (and who knows beer better than the Germans? The Czechs and the Irish, that's who) have engineered yeast expressing LTP1 to improve the foaminess of your draught. Potential brewmasters should also know that the temperature and duration of boiling your wort affects the extent and degree of LTP1 denaturation, and therefore the quality of your head. But LTP1 isn't the only molecule involved in a frothy mug, and not the only one subject to engineering. Japanese researchers have discovered that another barley protein, lipoxygenase-1 (LOX), has the opposite effect, reducing foam and flavour stability. LOX-less barley has been developed and tested for brewing by Sapporo.

So why go to all the trouble to increase the amount and stability of beer head - something many drinkers go out of their way to avoid? For one thing, a foamy pour reduces carbonation. This has two effects: First - and this is important to any drinker and the bartenders they're tipping - it means you can drink more. On average, a pint of beer contains 2.5 pints of carbon dioxide. A still pour keeps the CO₂ dissolved in the beverage, where it ends up in your stomach, contributing to a bloated feeling. Secondly, less dissolved CO₂ means a less acidic flavour. A bubbly pour releases the gas, affecting the taste. Acidity is also associated with a less thirst-quenching beer. Yes, research has been done into what factors determine how refreshing that beer is on a hot summer day. Strangely, while acidity - which can be caused by carbonation - along with foam and flavourfulness, negatively affect thirst-quenching properties, bubble density and carbonation have a positive correlation. Which is why your refreshing summer beer tends to be a fizzy, flavourless drink.

As the bubbles rise in your glass, they pick up more than just LTP1. Alpha-acids from the hops are also accumulated, and create a longer lasting foam. More importantly, these are also flavour compounds. Like wine - or just about anything - flavour is as much a play in the nose as on the palate. And while you won't find many beer drinkers discussing 'bouquet', it's there and it's important. The white cap in your glass concentrates these scents and flavours, enhancing the drinking experience.

Next time one of your friends gives you a foamless beer, ask them to pour it right. Not only is it visually appealing (and a clue that the beer you're drinking isn't flat) but it results in a more drinkable pint that engages your tactile, olfactory and gustatory senses. There's a lot of science in there too.

Who Watches the Watchers?

2009-11-25T13:38:00.002-05:00

Much was made, and rightfully so, about the warrantless wiretap program undertaken as part of President Bush's war on terror. (A program that has been defended by the current Obama administration)

That's pretty bad stuff.

Here's something worse: Wikileaks.org - a group that publishes leaked government and other documents - is currently releasing archives of text messages from 9/11, which can be found here. Many of these private texts predate the actual attacks by several hours, so whoever was collecting them can't even fall back on a 'war on terror' or 'response to the attacks' excuse. Mike Dunford has more:

As the WikiLeaks intercepts page notes, this material is undoubtedly going to be a fantastic resource for anyone who wants a better understanding of how people reacted as events unfolded. However, the mere existence of this archive raises enormous concerns. Where did it come from? Who compiled it, who stored it, and under what authority? Given the scope and magnitude of the archive, it is virtually impossible to believe that any non-governmental group could be responsible.

Big brother, anyone? Of course this kind of warrantless surveillance could never happen in Canada. Never.

Beer is the cure

2009-11-23T23:00:00.002-05:00

If you ever find yourself or someone else poisoned by methanol or ethylene glycol and without access to proper medical attention, beer is there for you. This is not as implausible as perhaps you might think as these poisonings cause dozens of fatalities in the US every year. How would these poisonings come about? Ethylene glycol is sweet tasting and is consumed as a substitute for ethanol and is found in antifreeze, and methanol can often contaminate homebrew alcohol aka moonshine. In either of these situations I bet that proper medical attention is not often close at hand.

After ingestion these molecules cause intoxication but are also converted by alcohol dehydrogenase into formic acid, in the case of methanol, and eventually oxalate, in the case of ethylene glycol. These are the actively toxic compounds. Formic acid poisoning can result in damage to the optic nerve and blindness while oxalate causes more general neurological damage followed by general cardiopulmonary depression and renal damage.

If proper medical attention is available fomepizole can be administered. This drug is a competitive inhibitor of alcohol dehydrogenase.

Another competitive substrate for alcohol dehydrogenase, ethanol, fortuitously can be found in therapeutically relevant concentrations in beer.

According to my calculations, the largest assumption in which I think is that you would absorb 100% of the ethanol in your tasty beverage, for methanol poisoning drink 3 beers in the first hour followed by 1 beer every two hours for as long as three days while for ethylene glycol poisoning drink 5 beers right away and maintain that blood alcohol level. These doses are based on 341mL 5% alcohol beers for an average weight guy. Also note that these doses are purely therapeutic and do not include any additional recreational alcohol consumption.

Treatment of methanol poisoning with ethanol.

Treatment of ethylene glycol poisoning with ethanol.

The Safety Song

2009-11-20T00:01:00.001-05:00

How our lab safety training should have be done:

Maybe singing and puppets would reduce the open-toed footwear in the lab.

From: The Sounds of Science

One Benefit of Global Warming

2009-11-19T10:06:00.000-05:00

Canadian Tourism Federation Welcome Video from Canadian Tourism Federation on Vimeo.

Say it Ain't So, David Suzuki!

2009-11-19T00:49:00.004-05:00

Last week, David Suzuki spoke at a convention for the Ontario Association of Naturopathic Doctors (OAND). Below is a poster for the event.

As mentioned before, naturopathy is an umbrella term that includes several non-science based approaches to medicine, including homeopathy. While I imagine (or hope) that his address at the convention had his usual environmental thrust (I haven't been able to track down a copy online), having a famous and respected scientist and environmentalist speak lends credibility to naturopathy and its pseudoscience. It's a great marketing move by OAND. Not such a great move by Dr. Suzuki. This is not unlike earlier this year when UofT and the SickKids Foundation appeared on a brochure for a conference put on by an anti-vaccine group.

I understand the importance of getting his message out to a wider audience though strangely the poster doesn't include the title of his talk, "The Challenge of the 21st Century: Setting the Bottom Line." Instead Dr. Suzuki is attached to the message, "naturopathic doctors are getting to the root of it," and this will be the take home message for many people. For better or for worse.

Ontario Bill 179: New Powers for Magician-Clinicians

2009-11-15T20:27:00.007-05:00

Currently moving through Ontario legislature is Bill 179, "An Act to amend various Acts related to regulated health professions and certain other Acts." This bill received it's second reading back in May, with third reading and ultimately royal assent expected in the coming months. Part of the bill is an amendment to the 2007 Naturopathy Act as follows:

The Naturopathy Act, 2007 is amended to provide for the prescribing, dispensing, compounding and selling of drugs and to deal with transitional disciplinary issues during the transition from regulation under the Drugless Practitioners Act to regulation under the Regulated Health Professions Act, 1991 and the Naturopathy Act, 2007.

Yes, similar to a bill that passed in BC, the amended Bill 179 would grant prescribing power to naturopathic practitioners. What is naturopathic medicine? The Canadian College of Naturopathic Medicine (CCNM), one of two schools in Canada that offer a doctor of naturopathic medicine program has the following definition:

Naturopathic medicine is a distinct system of primary health care that addresses the root causes of illness, and promotes health and healing using natural therapies. It supports your body's own healing ability using an integrated approach to disease diagnosis, treatment and prevention that includes: acupuncture/Asian medicine, botanical medicine, physical medicine (massage, hydrotherapy, etc.), clinical nutrition, homeopathic medicine [and] lifestyle counseling.

So naturopathic doctors (NDs) who could be granted prescribing powers include acupuncturists and homeopaths among other non-evidence based practitioners. Call me skeptical, but allowing, for example, a homeopath - somebody whose idea of sound medicine is prescribing a dilution that likely doesn't contain a single molecule of the "therapeutic" compound (i.e. just water) - to prescribe drugs seems like a bad idea. (Hmm. Will they follow homeopathic protocols for prescribed drugs? "Take this antibiotic, but dilute 10⁶⁰ times first") I'm not alone in being concerned.

Furthermore, granting prescription powers to naturopaths will blur the line between naturopathic doctors and their evidence-based counterparts. Prescribing drugs will give NDs an air of legitimacy, making them look like traditional MDs despite not having the same training. What do you prescribe for blocked chi flow? And with different standards for evidence, approach to disease, and diagnosis and treatment philosophy, how do you properly prescribe a drug that has been discovered, tested and approved in the 'traditional' regime. Nevermind the tension this places on pharmacists, whose jobs include evaluating the safety and appropriateness of a prescription (again, from a standard medicine point of view).

If there's a silver lining to this legislation, it's a faint one. Is the ability to prescribe drugs, a privilege several naturopath organizations lobbied to have included in the revised Bill 179, an admission of defeat by NDs? After all, if their methods and treatments are supposed to be effective or even better than 'harmful' standard care why the need to prescribe their 'toxic' drugs? Surely they can't be more effective than botanicals, acupuncture needles and tap water!

And maybe this will put an end to the Pharma Shill Gambit. The Pharma Shill Gambit, in short, is the dismissal of arguments supporting mainstream medicine because the people making them are no doubt on the payroll of the big, bad pharmaceutical industry (for some fine examples, check out a few of the comments here). Since naturopaths will be prescribing drugs, we won't have to deal with that anymore. After all, they'll be in the pockets of Big Pharma too, right? ... Right?

If you have something to say about these changes to the Naturopathy Act, let your MPP know before it passes.

[h/t: Skeptic North via Greg Laden]

Dick in a dish

2009-11-10T14:14:00.002-05:00

The team lead by Dr. Anthony Atala at the Wake Forest Institute for Regenerative Medicine as been highlighted on the bayblab before for growing a functioning bladder in a dish. Well they outdid themselves this time by growing a functioning rabbit penis in a dish, and grafting it back on males which conceived with it. Think of the possibilities! The paper is not yet available on pubmed but there is an article here about the discovery:

"Dr Atala's team first created a scaffold using the penis of a rabbit, and removed all the living cells from it, leaving only cartilage. They then took a small piece of tissue from the penis of another rabbit and grew the cells in a lab dish. Dr Atala says the work has taken his team 18 years to complete. "We had to find the right growth factors, the right soup to grow the cells in," he said."

Of note to our female readers, he has also been successful in growing clitoral tissues in the past.