Researcher identifies biological changes behind meat allergyResearcher identifies biological changes behind meat allergy
Triggered by tick bites, sufferers develop symptoms that can prove deadly after eating beef, pork.
August 23, 2019
A University of Virginia (UVA) School of Medicine scientist has identified key immunological changes in people who abruptly develop an allergic reaction to mammalian meat, such as beef. His work also provides an important framework for other scientists to probe this strange, recently discovered allergy caused by tick bites.
The findings by UVA's Dr. Loren Erickson and his team offer important insights into why otherwise healthy people can enjoy meat all their lives until ground beef or a hot dog suddenly become potentially life-threatening. Symptoms of the meat allergy can range from mild hives to nausea and vomiting to severe anaphylaxis, which can result in death.
"We don't know what it is about the tick bite that causes the meat allergy. And, in particular, we haven't really understood the source of immune cells that produce the antibodies that cause the allergic reactions," Erickson explained. "There's no way to prevent or cure this food allergy, so we need to first understand the underlying mechanism that triggers the allergy so we can devise a new therapy."
Understanding meat allergy
People who develop the allergy in response to the bite of the Lone Star tick often have to give up eating mammalian meat, including beef and pork, entirely, UVA said. Even food that does not appear to contain meat can contain meat-based ingredients that trigger the allergy. That means people living with the meat allergy must be hyper-vigilant.
The allergy was first discovered by UVA's Thomas Platts-Mills, a renowned allergist who determined that people were suffering reactions to a sugar called alpha-gal found in mammalian meat. Exactly what is happening inside the body, though, has remained poorly understood. Erickson's work, along with that of others at UVA, is changing that.
Erickson's team in UVA's department of microbiology, immunology and cancer biology has found that people with the meat allergy have a distinctive form of immune cells known as B cells, and they have them in great numbers, the announcement said. These white blood cells produce antibodies that release chemicals that cause the allergic reaction to meat.
In addition, Erickson, a member of UVA's Carter Immunology Center, has developed a mouse model of the meat allergy so that scientists can study the mysterious allergy more effectively.
"This is the first clinically relevant model that I know of, so now we can go and ask a lot of these important questions," he said. "We can actually use this model to identify underlying causes of the meat allergy that may inform human studies. So, it's sort of a back-and-forth of experiments that you can do in animal models that you can't do in humans. But you can identify potential mechanisms that could lead to new therapeutic strategies so that we can go back to human subjects and test some of those hypotheses."
Erickson discussed the new meat allergy model in an article in the Journal of Immunology. The research team consisted of Jessica L. Chandrasekhar, Kelly M. Cox, William M. Loo, Hui Qiao, Kenneth S. Tung and Erickson.
Source: University of Virginia, which is solely responsible for the information provided and is wholly owned by the source. Informa Business Media and all its subsidiaries are not responsible for any of the content contained in this information asset.
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