Risk On: The Dramatic Rise Of Genetically Modified Food

Gene editing has long been primarily used for research, treatment, and disease prevention. Currently, this technology is increasingly being applied to modify agricultural products to create more “perfect” species. More and more genetically edited foods are appearing on the market, including high-nutrient tomatoes and zero-trans-fat soybean oil.

Some argue that gene-edited foods are safer than genetically modified (GM) foods (pdf). The U.S. Department of Agriculture (USDA) specified in 2018 that most genetically edited foods do not need to be regulated. However, are these foods, which will increasingly appear on the table, really risk-free?

Gene Modification 2.0: Gene-Edited Foods May Become More Available

In September 2021, the first gene-edited food—Sicilian Rouge tomatoes—made with CRISPR-Cas9 technology were officially on sale.

This gene-edited tomato contains high levels of gamma-aminobutyric acid (GABA), which helps lower blood pressure and aids relaxation.

Japanese researchers remove a gene from the genome of the common tomato. After the gene is removed, the activity of an enzyme in tomatoes increases, promoting the production of GABA. The GABA content in this tomato is four to five times higher than that of a regular tomato.

Warren H. J. Kuo, an emeritus professor of the Department of Agronomy at National Taiwan University, explains that both gene editing and transgenic organisms are genetic modification, also known as genetic engineering.

The earliest technique was genetic modification, that is, transgenic—in which a plant or animal is being inserted a gene from another species, such as a specific bacterial gene. The purpose of artificially modifying plants and animals is to improve their resistance against diseases and droughts, promote growth rates, increase yields, or improve nutrient content. However, the finished product will exhibit the foreign species’ genes.

Kuo says that transgenic modification is “genetic modification 1.0,” while gene editing is “genetic modification 2.0.” Gene editing is directly modifies the genes of the organism itself, so most of them do not exhibit foreign genes. However, the most common gene editing technique, CRISPR-Cas9, introduces foreign genes as the editing tool, and then removes the transplanted foreign genes.

While gene-edited tomatoes were on the market, Japan also approved two types of fish genetically edited with CRISPR—tiger pufferfish and red seabream. These fish are genetically edited to accelerate muscle growth. Among them, the gene-edited tiger pufferfish weighs nearly twice that of the ordinary species.

Back in 2019, the United States had used another earlier gene-editing technique to create soybean oil with zero trans fat and introduced it into the market.

Gene-edited foods which have also been approved for sale worldwide by now include soybeans, corn, mushrooms, canola, and rice.

The number of genetically edited foods on the market is likely to increase. Patent applications relating to CRISPR-edited commercial agricultural products have skyrocketed since the 2014/2015 period.

Gene-Edited Foods May Pose 2 Major Risks

Proponents of genetic modification believe this is a method to perfect agricultural produce and solve problems such as pests, droughts, and nutritional deficiencies. But the technology is still a double-edged sword.

“Genetic engineering indeed has its benefits in the short term, but it may bring long-term pitfalls,” said Joe Wang, molecular biologist. Wang is currently a columnist with The Epoch Times.

Hornless cattle were once the celebrity of the animal kingdom, appearing in news stories one after another.

Many breeds of dairy cattle have horns, but they are dehorned to prevent them from harming humans and other animals, and to save more feeding trough space. To solve the “problem” of horns, the gene editing company Recombinetics successfully produced hornless cattle with gene-editing techniques many years ago.

The company simply added a few letters of DNA to the genome of ordinary cattle and their offspring didn’t grow horns, either.

However, a few years later, an accident happened.

The FDA found that a modified genetic sequence of a bull contained a stretch of bacterial DNA including a gene conferring antibiotic resistance, which has been one of the global health crises in recent years. Scientists aren’t clear whether this gene in gene-edited cattle will pose a greater risk than expected or not, and the FDA has stressed that it’s hazard-free. However, John Heritage, a retired microbiologist from Leeds University, told MIT Technology Review that the antibiotic resistance gene could be absorbed by gut bacteria in cattle and could create unpredictable opportunities for its spread.

In fact, this is one of the currently perceived risks of genetically edited foods.

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