科学美国人60秒 SSS 2014-01-08

（单词翻译）

 It’s important to trust your gut¹ because the stomach and the food put into it can influence the entire body. For example a new study finds that mice that eat lots of fiber² have stronger resistance against asthmatic attacks. For two weeks, let mice eat one of three diets, low fiber or regular chaw or food supplementary⁴ with rich fiber packed in.  Then the mice were exposed to allergy⁵ inducing dust mites⁶. And the low fiber rats suffer from increased air information while the high fiber group experience less asthmatic response. Seems that fiber supports gut bacteria that produce anti-inflammatory molecules⁷ called short-chained vadi-asats. These molecules then enter the blood streams where they can influence the immune system.  And an overreacted immune system can play a role in allergy and asthma³ but the bile acids can calm down the immune reaction. The work is published in Natural Medicine. Directly injecting the mice with the short-chain bile acid had a similar anti-inflammatory effect. But mice probably prefer fiber to a series of shots.  And it still helps them breathe easy.