[转载]Most Offspring Died When Mother Rats Ate Genetically&nb

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Most Offspring Died When Mother Rats AteGenetically Engineered
Soy
http://responsibletechnology.org/gmo-dangers/health-risks/articles-about-risks-by-jeffrey-smith/Most-Offspring-Died-When-Mother-Rats-Ate-Genetically-Engineered-Soy-October-2005
The Russian scientist planned a simpleexperiment to see if eating genetically modified (GM) soy might influenceoffspring. What she got, however, was an astounding result that may threaten amulti-billion dollar industry.
Irina Ermakova, a leading scientist at theInstitute of Higher Nervous Activity and Neurophysiology of the Russian Academyof Sciences (RAS), added GM soy flour (5-7 grams) to the diet of female rats.Other females were fed non-GM soy or no soy at all. The experimental diet begantwo weeks before the rats conceived and continued through pregnancy andnursing.
Ermakova's first surprise came when herpregnant rats started giving birth. Some pups from GM-fed mothers were quite abit smaller. After 2 weeks, 36% of them weighed less than 20 grams compared toabout 6% from the other groups (see photo below).
http://blog.sciencenet.cn/static/ueditor/themes/default/images/spacer.gifOffspring
Photo oftwo rats from
the
Russian study,
showing
stunted growth—
the
larger rat, 19 days old,
is
from the control group;
the
smaller rat, 20 days old,
is
from the "GM soy" group.
But the real shock came when the ratsstarted dying. Within three weeks, 25 of the 45 (55.6%) rats from the GM soygroup died compared to only 3 of 33 (9%) from the non-GM soy group and 3 of 44(6.8%) from the non-soy controls.
Ermakova preserved several major organsfrom the mother rats and offspring, drew up designs for a detailed organanalysis, created plans to repeat and expand the feeding trial, and promptlyran out of research money. The $70,000 needed was not expected to arrive for ayear. Therefore, when she was invited to present her research at a symposiumorganized by the National Association for Genetic Security, Ermakova wrote"PRELIMINARY STUDIES" on the top of her paper. She presented it onOctober 10, 2005 at a session devoted to the risks of GM food.
Her findings are hardly welcome by anindustry already steeped in controversy.
GM Soy's Divisive PastThe soy she was testing was Monsanto'sRoundup Ready variety. Its DNA has bacterial genes added that allow the soyplant to survive applications of Monsanto's "Roundup" brandherbicide. About 85% of the soy gown in the US is Roundup Ready. Since soyderivatives, including oil, flour and lecithin, are found in the majority ofprocessed foods sold in the US,many Americans eat ingredients derived from Roundup Ready soy everyday.
The FDA does not require any safety testson genetically modified
foods. If Monsanto or other biotech companies declaretheir foods
safe, the agency has no further questions. The rationale for
thishands-off position is a sentence in the FDA's 1992 policy that
states,"The agency is not aware of any information showing that
foods derived bythese new methods differ from other foods in any
meaningful or uniformway."[1]
There have been less than 20 published,peer-reviewed animal feeding
safety studies and no human clinical trials—inspite of the fact
that millions of people eat GM soy, corn, cotton, or canoladaily.
There are no adequate tests on "biochemistry, immunology,
tissuepathology, gut function, liver function and kidney
function,"[3]
Other studies on Roundup Ready soy alsoraise serious questions.
Research on the liver, the body's major de-toxifier,showed that
mice fed GM soy developed misshapen nuclei and other
cellularanomalies.[4]
An animal feeding study published by Monsantoshowed no apparent
problems with GM soy,[8]
The gene that is inserted into GM soyproduces a protein with two sections that are identical to known allergens.This might also account for the increased allergy rate. Furthermore, the onlyhuman feeding trial ever conducted confirmed that this inserted gene transfersinto the DNA of bacteria inside the intestines. This means that long after youdecide to stop eating GM soy, your own gut bacteria may still be producing thispotentially allergenic protein inside your digestive tract.
The migration of genes might influenceoffspring. German scientists
found fragments of the DNA fed to pregnant mice inthe brains of
their newborn.[10]
The health of newborns might also beaffected by toxins, allergens, or anti-nutrients in the mother's diet. Thesemay be created in GM crops, due to unpredictable alterations in their DNA. Theprocess of gene insertion can delete one or more of the DNA's own naturalgenes, scramble them, turn them off, or permanently turn them on. It can alsochange the expression levels of hundreds of genes. And growing the transformedcell into a GM plant through a process called tissue culture can createhundreds or thousands of additional mutations throughout the DNA.
Most of these possibilities have not beenproperly evaluated in
Roundup Ready soy. We don't know how many mutations oraltered gene
expressions are found in its DNA. Years after it was
marketed,however, scientists did discover a section of natural soy
DNA that wasscrambled[12]
Those familiar with the body of GM safetystudies are often
astounded by their superficiality. Moreover, severalscientists who
discovered incriminating evidence or even expressed concernsabout
the technology have been fired, threatened, stripped of
responsibilities,or censured.[13]
Ermakova's research, however, will likelychange that. That's because her study is easy to repeat and its results are soextreme. A 55.6% mortality rate is enormous and very worrisome. Repeating thestudy is the only reasonable option.
AmericanI presented Dr. Ermakova's findings, withher permission, at the annual conference of the AmericanAcademy of Environmental Medicine(AAEM) in Tucsonon October 27, 2005. In response, the AAEM board passed a resolution asking theUS National Institutes of Health (NIH) to sponsor an immediate, independentfollow-up of the study. Dr. Jim Willoughby, the Academy's president, said,"Genetically modified soy, corn, canola, and cottonseed oil are beingconsumed daily by a significant proportion of our population. We need rigorous,independent and long-term studies to evaluate if these foods put the populationat risk."
Unfortunately, there is a feature about GMcrops that makes even
follow-up studies a problem. In 2003, a French laboratoryanalyzed
the inserted genes in five GM varieties, including Roundup
Readysoybeans.[14]
Unstable genes make accurate safetytesting impossible. It also may explain some of the many problems reportedabout GM foods. For example, nearly 25 farmers in the US and Canada say thatcertain GM corn varieties caused their pigs to become sterile, have falsepregnancies, or give birth to bags of water. A farmer in Germany claimsthat a certain variety of GM corn killed 12 of his cows and caused others tofall sick. And Filipinos living next to a GM cornfield developed skin,respiratory, and intestinal symptoms and fever, while the corn was pollinating.The mysterious symptoms returned the following year, also during pollination,and blood tests on 39 of the Filipinos showed an immune response to the Bttoxin—created by the GM corn.
These problems may be due to particular GMvarieties, or they may result from a GM crop that has "gone bad" dueto genetic rearrangements. Even GM plants with identical gene sequences,however, might act differently. The amount of Bt toxin in the Philippine cornstudy described above, for example, varied considerably from kernel to kernel,even in the same plant.[16]
With billions of dollars invested in GMfoods, no adverse finding has yet been sufficient to reverse the industry'sgrowth in the US.It may take some dramatic, indisputable, and life-threatening discovery. Thatis why Ermakova's findings are so important. If the study holds up, it maytopple the GM food industry.
I urge the NIH to agree to the AAEM'srequest, and fund an immediate, independent follow-up study. If NIH funding isnot forthcoming, our Institute for Responsible Technology will try to raise themoney. This is not the time to wait. There is too much at stake.
Click here for
Click here for the
Jeffrey M. Smith is working with a team ofinternational scientists
to catalog all known health risks of GM foods. He isthe author
of
from October 2005
© Copyright 2005 by Jeffrey M. Smith
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