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What Is Food Allergy?

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Our immune system will attack foreign substances that enter the body. Strictly speaking, food can be considered as exogenous substances, but the body is capable of allowing them to absorb nutrients, this is because the internal mechanism of immune system will prevent it producing beneficial antigen reaction. If such tolerance mechanisms go wrong, we will suffer a potentially fatal food allergy. 
In recent years, the incidence of food allergies is constantly increasing, but scientists still do not know how the food immune tolerance is established. Actually, except for the common food, gmp grade peptides might also affect the physical health to a certain degree, as well as caprooyl tetrapeptide-3. Regulatory T cells is an important way to build the body’s immune tolerance. The presence of a special class of Treg cells in the small intestine and large intestine, namely the peripheral Treg cells. Researchers studied some mice with no antigen, and found normal diet could induce intestinal to generate pTreg cells.
They also compared the influence that liquid food (milk) and solid food placed on mice’ pTreg cell development. Studies have shown that only a small amount of pTreg intestinal cells in newborn mice can keep unweaned. When the mice were weaned and took solid food, there were a lot of pTreg cells around the small intestine within a few weeks, but if neonatal mice absorbed special food with no antigen after ablactation, their small intestine would not develop pTreg cells. Thus, most part of the pTreg cells in small intestine is generated by antigen-induced solid foods.
In fact, early intestinal environment is more inclined to tolerance response, which may because breast milk contains induced component in immune tolerance. After the intake of solid food, small intestine will soon generate a large number of pTreg cells. Breast milk and newly generated pTreg cells should cooperate with each other, to help children enjoy rice and other solid food, in order to avoid food allergy. Research shows that if newborn mice grew up in the absence of pTreg cells, they are more likely to have an allergy to food.
Faced with invading pathogens, immune system cells will call on cell army and peacekeepers. When cell army has cleared the invaders, peacekeeping cells will stop further fight. Actually, these cells are a special class of T cells. They have a lower proliferation and are responsible for the end, to avoid autoimmune reactions and immune responses. This research is expected to help people develop new drugs to treat autoimmune diseases and some cancers.
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