Is genetically modified soybeans allergic to humans?
Huang Kunlun: The newly introduced protein in genetically modified soybeans does not increase the risk of sensitization, and genetic manipulation has not caused the increase in the type and content of allergens in soybean itself.
Common allergens are generally high levels of biological proteins, accounting for 1% - 80% of total protein. The CP4 EPSPS protein accounted for only 0.08% of the total protein in the transgenic soybean. The gene's donor soil Agrobacterium is not an allergen, and the protein can be rapidly digested in simulated gastric fluids. In addition, from 1995 to 2007, the serum of allergic children and adults in Europe, the United States, Japan, and South Korea, especially the serum of soybean allergy patients, was used to perform specific binding experiments with the CP4 EPSPS protein, indicating that the protein does not work with any Allergic serum binding. Experiments with rats also confirmed that the protein did not elicit an allergic reaction in animals, either by injection or by gavage.
Bloomwald: There is no basis for the claim that GM foods cause allergies in humans.
Can the long-term safety of genetically modified humans be guaranteed?
Yang Xiaoguang: The long-term health effects of genetically modified foods are one of the important issues in the evaluation of genetic safety. Before GM foods are brought to market, they must undergo strict food safety evaluation. This evaluation system is more rigorous and even harsh than traditional foods. This includes the evaluation of the long-term health effects of the human body. In the test process, an overconstant test was used, which is much more than the conventional food dose. The reason why the supernormal test is used is that the long-term effect is taken into consideration, and the scientific research model is equivalent to the long-term effect test. The current chemical foods and medicines are mostly verified using this system. For example, a 90-day feeding experiment in rats corresponds to 1â„8 of the rat's life cycle. The rat 2-year feeding test is a chronic toxicity test that observes its entire life cycle.
Bennett (Professor, University of California, Davis): People have concerns about the safety of genetically modified crops mainly because they do not understand it. They believe that genetically modified plants belong to unnatural breeding methods and have potential safety hazards. In fact, transgenes are only the selective introduction of genes. It is a developmental stage in the long history of human breeding.
Bloomwald: According to the information released by the US Department of Agriculture, the proportion of GM soybeans and genetically modified corn grown in the United States is above 90%. Since the commercial production of genetically modified soybeans in 1996, hundreds of millions of Americans have directly or indirectly consumed genetically modified soybeans for 16 years. To date, no confirmed genetically modified food safety accident has occurred.
Does the glyphosate-resistant crop cause weeds to spread?
Wu Kongming (an academician of the Chinese Academy of Engineering and the vice president of the Chinese Academy of Agricultural Sciences): As early as before the application of glyphosate-tolerant crops, there were reports of resistance to weeds. It has been found that most of the resistant weeds cannot hybridize with existing glyphosate-tolerant crops. Therefore, there is no evidence that the production of resistant weeds is directly related to the cultivation of glyphosate resistant crops. As with other organisms, long-term, large-scale exposure of weeds to certain herbicides does cause resistance to the herbicides, which is a common biological phenomenon. (Liu Chengjun is reprinted from Xinjiang Xingnong.com)
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