Political (Single-Celled) Animals

Time to talk politics. Not Dems vs. Reps or left vs. right, up vs. down, etc. I’m talking the politics of science, specifically medicine. Although the scene is changing, there have been (and still are) strong inclinations to believe Western scientific/medical practices are the end-all-be-all and everything else is foreign bunk. However, studies and reviews are few and far between actually confirming or denying the actual bunk-itude of non-Western/”traditional” medical practices. But again, this is changing; the World Health Organization now has a list of ailments treatable with acupuncture and other various Eastern therapies are becoming more popular in conjunction with Western ones. This brings me to what I really want to talk about: bacteriophage therapy.

Bacteriophage are viruses that target bacteria, hijacking bacterial genetic machinery in order to replicate themselves. Phage may be lytic or lysogenic. Lytic phage will get to work right quick replicating before making the bacteria literally explode with baby viruses. Cute. Lysogenic phage on the other hand are patient. They hide viral DNA or RNA (viruses may have either) in the bacterial genome until the time is right. Then the bacteria explodes. Furthermore, phage are species specific, so one kind of virus will only attack one kind of bacteria. Beginning to see the possibilities? Human bacterial pathogens don’t stand a chance. And unlike antibiotics, phage will evolve alongside their prey, making them virtually immune to the resistances plaguing modern medicine. So why aren’t we all taking bacteriophage instead of antibiotics? Researched off and on since the latter 1800s, phage were even produced commercially to fight bacterial infections. But challenges were made to the efficacy of phage therapy and antibiotics quickly became much more popular so phage were largely forgotten. In the West, anyway, in Eastern Europe and the Soviet Union, bacteriophage therapy use and research persisted, displaying success in combating multi-drug resistant bacteria with phage. It’s like a miracle cure, but politics prevented phage from staging a comeback in the West. Despite the mounting evidence in support of phage therapy, the reports were all in Georgian, or Polish to a lesser extent (the leading institute in this field since the 1920’s is in Georgia, the one in Poland popped up in the 1950’s). Not terribly popular languages outside Eastern Europe even today. When some papers were eventually produced in English, the writer apparently never spoke to the scientists or even had a basic knowledge of medicine because it claimed (among other things) that the phage were useful against allergies, besides mixing up which phage were to be used on which infections. The Western scientists were not impressed. Even if the English papers were accurate, the most research came from “damn, dirty Commies” so it never really had a chance. UNTIL NOW.

Image

Damn, dirty Commie phage, curing all our shit.

OK, not really “NOW” now, but “now” twenty-some years ago. In the ‘80s phage research experienced a revival in Great Britain at the hands of William Smith. Since then papers have been piling up in support of phage therapy and its superiority over antibiotics. However, more rigorous studies need to be conducted to further understand its efficacy, so it will be a while before you can use a virus on your E. coli infection. Still, when the headlines of multi-drug resistant bacteria loom, remember that for every superbug there’s a superflyswatter.

It just needs to go through clinical trials.

 

Source

Sulakvelidze, Alexander, Zephira Alavidze and J. Glenn Morris, Jr. 2001. “Bacteriophage Therapy”. Antimicrobial Agents Chemotherapy. 45(3): 649-659.

Photo credit Dennehy Lab, Queens College: http://dennehylab.bio.qc.cuny.edu/

Eau de My Thesis

I swore to myself I would save any posts relating to my senior thesis for emergencies. The poster is sitting literally six inches from my hand as I type, and since I wouldn’t have to study much to post anything on it, it feels like a cop out. However, considering I have done two posts involving blood flow, I thought I’d throw in a little animal behavior.

If you’re ever bitten by a snake and tell the doctor that you were bitten by a “large brown snake”, you are toast. It’s not snake-ist to say they all look alike; the snakes agree. Limit a randy male to visual cues on his chosen lady during mating season and you will reduce the poor guy to tears (assuming snakes cried). Research involving (I kid you not) headless and tailless lady snakes shows that males rely primarily on pheromone cues to orient themselves during copulation. However, without scent cues, he probably wouldn’t have chosen said lady in the first place, so randy male snakes everywhere may rejoice.

As you may understand now, pheromones are pretty important to snakes. Which brings me to the very lovely Psammophis. Their family, the psammophiine snakes, is actually known for scale polishing behaviors involving secretions from the nasal gland. This serves to coat the snake (a female) in a nice, smelly pheromone that will rub off as they move and result in a pheromone trail that mates can follow and competitors can avoid. It’s like that guy at your high school that smothered himself in Axe Body Spray. Everyone avoids him, but the intention is the same; scent trail to LOVE. Or an asthma attack, whatever.

Back to the sweet-smelling Psammies. Besides making a trail o’ love, Psammophis will scale polish as a means of communication. Using their chins and a currently unknown pheromone source, males and females will perform a simple, body length stroke on their mate. This is an automatic action, the snake version of “hey baby”. Females, however, will perform a zig-zag stroke on their chosen male in the presence of other females. This translates roughly to, “Step off, bitch”.

As cool as this sounds, pheromone communication in snakes isn’t very well studied. For some reason folks are more interested in snake venom glands than pheromone glands. So if you’re looking for a thesis topic and snakes make you squeal, then pheromones could be your deal.

Source:

Chippaux, J. P. and K. Jackson (in prep). Snakes of West and Central Africa. Johns Hopkins University Press, Baltimore.

de Haan, C. C. and A. Cluchier. 2006. Chemical marking behaviour in the psammophiine snakes Malpolon monspessulanus and Psammophis phillipsi. Herpetologica Bonnensis II. 211-212

Shine, R., D. O’Connor, and R. T. Mason. 2000. The problem with courting a cylindrical object: how does an amorous male snake determine which end is which? Journal of Animal Behavior 137: 727-739.