A possible cure for allergies?
- Date:
- September 8, 2015
- Source:
- Swiss Institute of Allergy and Asthma Research (SIAF)
- Summary:
- Researchers discovered a mechanism that stops the body reacting with an excessive immune reaction. This could be the basis for a new treatment for allergies, they say.
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Most people with allergies have to take medication throughout their life: Their body "thinks" that proteins from the environment are so "strange" that they elicit an immune reaction. Until present, it was not possible to develop an efficient therapy so that the body "learns" to stop in an overreacting way.
Scientists from the Swiss Institute of Allergy and Asthma Research (SIAF) in Davos, from the University of Tokyo, the RIKEN Research Institute in Yokohoma, and from Stanford University recently discovered a mechanism that could be the basis for a new way to handle allergies.
Mast cells play a key role in the disease process in allergies: As a reaction towards an allergen -- for example pollen or dust mites -- they release big amounts of substances that initiate an inflammatory process. Study leader Hideaki Morita and his team discovered that mast cells are not only "bad guys," but also have a "good side": They release the substance interleukin-2 that induces the production of certain immune cells called T-regulatory (Treg) cells. Treg cells can suppress the allergic inflammatory process in the airways induced by interleukin-10.
It is already known for some time that Treg cells can subdue an excessive immune response and the resulting inflammation. For example, injections with Treg cells prevented autoimmune diseases in mice. However, for Treg cell treatments one needs a large amount of these cells, which is not easy to realise. In the blood, there are just a few of them, and in vitro they are difficult to produce. Using mast cells, Treg cells could be easily produced in the laboratory in large quantities. "The mechanism that we discovered, could be the basis for a new way to handle allergies," says Hideaki Morita.
Story Source:
Materials provided by Swiss Institute of Allergy and Asthma Research (SIAF). Note: Content may be edited for style and length.
Journal Reference:
- Hideaki Morita, Ken Arae, Hirotoshi Unno, Kousuke Miyauchi, Sumika Toyama, Aya Nambu, Keisuke Oboki, Tatsukuni Ohno, Kenichiro Motomura, Akira Matsuda, Sachiko Yamaguchi, Seiko Narushima, Naoki Kajiwara, Motoyasu Iikura, Hajime Suto, Andrew N.J. McKenzie, Takao Takahashi, Hajime Karasuyama, Ko Okumura, Miyuki Azuma, Kazuyo Moro, Cezmi A. Akdis, Stephen J. Galli, Shigeo Koyasu, Masato Kubo, Katsuko Sudo, Hirohisa Saito, Kenji Matsumoto, Susumu Nakae. An Interleukin-33-Mast Cell-Interleukin-2 Axis Suppresses Papain-Induced Allergic Inflammation by Promoting Regulatory T Cell Numbers. Immunity, 2015; 43 (1): 175 DOI: 10.1016/j.immuni.2015.06.021
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