‘Disease-Proof Mosquito’ Could Spread Like Wildfire – ScienceNOW

“The scientists used a so-called homing-endonuclease gene (HEG), a selfish gene found in fungi, plants, and bacteria that has the ability to create a second copy of itself in individuals that have only one. This ensures that all offspring have the gene as well, and it’s one of the fastest ways genes can spread in nature, says insect geneticist Jason Rasgon of the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland, who was not involved in the new study.”

Why does the idea of releasing a genetically modified animal into the wild as a way to control a wild-type population make me uneasy. Uh, GM release? Uh, controlling organism by introducing one that isn’t native?

Shiver. How many generations will it take before we are comfortable with that?

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Education: The PhD factory : Nature News

“Scientists who attain a PhD are rightly proud — they have gained entry to an academic elite. But it is not as elite as it once was. The number of science doctorates earned each year grew by nearly 40% between 1998 and 2008, to some 34,000, in countries that are members of the Organisation for Economic Co-operation and Development (OECD). The growth shows no sign of slowing: most countries are building up their higher-education systems because they see educated workers as a key to economic growth (see ‘The rise of doctorates’). But in much of the world, science PhD graduates may never get a chance to take full advantage of their qualifications.”

Great article.

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Needham losing photo icon – Boston.com

“When’s the last time you brought a roll of film to the store for processing? If you can’t remember, you’ll begin to understand why Scorby’s Camera will soon close its doors after more than a half-century in Needham Center. “

A photo-story about a camera shop that is closing down due to pressures of digital photography and big box stores that process digital images. Part of me thinks this is like the newspapers folding. Yes, it’s a sign of the change to a digital world, but also, I hope, the industry settling to a new level – new biz models need to be figured out and the craft will remain in the background, much like farriers, horse tack shops, lino-typists, and other craftsfolk of bygone ages. I believe that new tech does not kill old tech, just forces them into new niches.

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Gut bacteria in Japanese people borrowed sushi-digesting genes from ocean bacteria | Discover Magazine

“Nori is, by far, the most likely source of bacteria with porphyran-digesting genes. It’s the only food that humans eat that contains any porphyrans and until recently, Japanese chefs didn’t cook nori before eating it. Any bacteria that lingered on the green fronds weren’t killed before they could mingle with gut bacteria like B.plebius. Ruth Ley, who works on microbiomes, says, “People have been saying that gut microbes can pick up genes from environmental microbes but it’s never been demonstrated as beautifully as in this paper.””

Japanese gut bacteria picking up genes from marine bacteria that live on seaweed. This blew my mind, but I am not surprised. We do know that there can be rapid gene changes in humans (ADH, lactase), why shouldn’t there be rapid changes in our fellow microbiomes? Very interesting implications with respect to therapy and diets.

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Divided by language, united by gut bacteria – people have three common gut types | Discover Magazine

“Enterotypes aren’t quite as well-defined as, say, blood groups, but they could have similar uses as medical markers. The microbiome helps us to digest our food and it affects our susceptibility to diseases; the enterotypes could reflect these roles. Each enterotype was dominated by a specific genus of bacteria, and varied in the proportions of the other members. They produce energy in subtly different ways, they’re particularly efficient at breaking down different nutrients, and they specialise at creating different vitamins.”

This article reports on findings that there are “enterotypes”. While I have been seeing slightly different findings from others, this just goes to show that we keep finding out new things about our bacteria.

One other thing: at the end of this article is a very interesting slide show with snippets of other interesting findings related to our microbiome. Do flip through it.

[via @changeist]

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Language May Have Helped Early Humans Spread Out of Africa – ScienceNOW

“The story of humanity’s prehistoric expansion across the planet is recorded in our genes. And, apparently, the story of the spread of language is hidden in the sounds of our words. That’s the finding of a new study, which concludes that both people and languages spread out from an African homeland by a similar process—and that language may have been the cultural innovation that fueled our ancestors’ momentous migrations.”

Interesting technique and interesting findings.

Bookmarked in Delicious.

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ScienceShot: Green Eggs and Salamanders – ScienceNOW

“This is the first case of an algae living symbiotically within a vertebrate, the team reports online today in the Proceedings of National Academy of Sciences. How the photosynthesizing algae gets there, and how it survives inside the tissues and cells of this predominantly nocturnal amphibian is still baffling to scientists.”

This is one cool report. Folks seem to have this idea of the inviolate cell, but then we see examples like this – not only do the algae and salamander hang out together, but in the end, the algae becomes part of the salamander. Does this salamander (or the algae) have a regulatory mechanism to foster this mutualism? Or is this random and the algae and animal just tolerate it? I’m placing my bet on a mechanism, though not sure if it’s the algae or the salamander controlling this.

Bookmarked in Delicious.

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Book: The Windup Girl, by Paolo Bacigalupi

This is one great book. It’s set a few hundred years in the future, long after the oil-fueled “Exapansion” (that would be the time we are living the end of, right up to “Peak oil”), and after the “Contraction” (the collapse of society as cheap energy runs out).

The world of the Windup Girl is a post-synthetic biology world where synthetic organisms have gone wild and decimated natural populations, and “generippers” have created special humans, cheshire cats, killer weevils, and scourge upon scourge of killer diseases.

All the action of the book takes place in a Bangkok surrounded by levees to keep out the high water (caused by global warming, of course). The forces at play are calorie companies (ag companies trying to sell GM food); the Environmental Ministry (tasked to protect Thailand from external GM products, many which have gone haywire and ruined other countries); the Trade Ministry (salivating over the money GM products could bring, mostly through favors from the calorie companies); and the underworld of thieves, desperate immigrants, and the Mob.

The built world is so believable and interesting. You get into character, understanding how seeing a diesel vehicle is an exorbitant use of joules, or fat folks show off the calories they have access to, or how ice is a luxury (costs energy to produce). Also, guns and machines run off of springs, flywheels, and brute force (calories converted to kinetic energy).

The intricacy and world-building reminds me of Neal Stephenson (and not Gibson, to whom everyone seems to compare Bacigalupi – though I haven’t read Gibson in ages). And it was really exciting to see such a strong story wrapped around biology in a semi-post-electronic age. One thing that stood out, at least for the practical microbiologist in me, was there was nothing about microbes. The animals that were functional, were larger organisms and a bit exotic (such as mating glow-worms).

In any case, I highly recommend this book to someone who likes well-written SF with well-thought out world-building and a strong twist of bioscience. All the rest of you should read it just to blow your minds.

Here’s a nice concluding quote from a review in the Guardian:

The Windup Girl embodies what SF does best of all: it remakes reality in compelling, absorbing and thought-provoking ways, and it lives on vividly in the mind.”

Image from Wikipedia (warning, spoilers!)