Showing posts with label genetic engineering. Show all posts
Showing posts with label genetic engineering. Show all posts

January 5, 2012

Update Re- Genetically-Modified Foods

As explained in a 2009 post and by others before me, "insect-resistent" GM plants have in fact been engineered to produce food that's literally full of poison.

Lately I'm hearing stories on public radio (the only traditional-media news product I regularly consume) about "good" GM – how spider genes have enabled silkworms to create stronger silk, and how sunflower seeds have been engineered to produce more cooking oil.

I hope this surfacing of the GM discussion results from an independent, journalistic initiative on the part of public radio – that seems possible, since I believe I also heard mention that the use of environmentally-hazardous pesticides or other chemicals has actually increased with the use of GM crops. Alternatively, the coverage may arise from a p.r. initiative on the part of the GM industry.

Regardless, I welcome the discussion, since I think genetic engineering is here to stay and does in fact offer the potential to help us build a better world quicker than natural selection might otherwise do.

But for purposes of the discussion, it would seem useful to distinguish between GMOs that deploy different kinds of strategies – e.g., for starters, to distinguish between poisonous and non-poisonous GMOs (since creating organisms that produce intrinsically poisonous food would seem more obviously likely to give rise to undesirable consequences).

To do that, we need new, clear terms – and we should expect that any terms the industry might propose will not be clear.

So let's propose some ourselves. Here's an initial attempt:

"Poisonous GMO": a GMO engineered to cause death or illness in any living organism, or to impair or inhibit the reproductivity or functioning of otherwise healthy, normal or typical living organisms.

"Non-Poisonous GMO": a GMO which is not a Poisonous GMO, as defined above.
Alternative or additional suggestions welcome.

February 26, 2011

Brainbows

Four years ago, Harvard scientists devised a way to make mouse neurons glow in a breathtaking array of colors, a technique dubbed “Brainbow.” This allowed scientists to trace neurons’ long arms, known as the dendrites and axons, through the brain with incredible ease, revealing a map of neuron connections.

Using a clever trick of genetic engineering, in which genes for three or more different fluorescent proteins were combined like paints to generate different hues, researchers created a system to make each neuron glow one of 100 different colors.

. . . . This is the first time that scientists have converted the technique to work in fruit flies, and because these organisms have a very sophisticated set of existing genetic tools, researchers can exert even greater control over when and where the fluorescent proteins are expressed . . . . Researchers have traditionally had to stain just one or two neurons in each sample, painstakingly compiling data from many brains to build a map.
More at technology review.

June 10, 2009

Genetically Modified Foods

This is not my usual issue, but I feel compelled to share this article by Jeffrey M. Smith at Seeds of Deception. I hadn't realized that, when they say GM'd foods are "resistant" to insects, what they really mean is that the plants have been engineered to produce food that's literally chock full o' poison. Salient points (out of order per the original article):

"GM corn and cotton are engineered to produce their own built-in pesticide in every cell. When bugs bite the plant, the poison splits open their stomach and kills them. Biotech companies claim that the pesticide, called Bt—produced from soil bacteria Bacillus thuringiensis—has a history of safe use, since organic farmers and others use Bt bacteria spray for natural insect control. Genetic engineers insert Bt genes into corn and cotton, so the plants do the killing.

"The Bt-toxin produced in GM plants, however, is thousands of times more concentrated than natural Bt spray, is designed to be more toxic,[10] has properties of an allergen, and unlike the spray, cannot be washed off the plant.

* * * * *
["Not a single human clinical trial on GMOs has been published", but] "[w]hen GM soy was fed to female rats, most of their babies died within three weeks—compared to a 10% death rate among the control group fed natural soy.[3] The GM-fed babies were also smaller, and later had problems getting pregnant.[4] When male rats were fed GM soy, their testicles actually changed color—from the normal pink to dark blue.[5] Mice fed GM soy had altered young sperm.[6] Even the embryos of GM fed parent mice had significant changes in their DNA.[7]"

* * * * *
"Scientists at the Food and Drug Administration (FDA) had warned about all these problems even in the early 1990s. . . . [T]he scientific consensus at the agency was that GM foods were inherently dangerous, and might create hard-to-detect allergies, poisons, gene transfer to gut bacteria, new diseases, and nutritional problems. They urged their superiors to require rigorous long-term tests.[27] But the White House had ordered the agency to promote biotechnology and the FDA responded by recruiting Michael Taylor, Monsanto’s former attorney, to head up the formation of GMO policy. . . . Mr. Taylor later became Monsanto’s vice president.

* * * * *
"There is a pocket Non-GMO Shopping Guide, . . . which is available as a download . . . ."
(Please see the original article at the link above for the footnotes and much more.)