www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

USEUROPEAFRICAASIA 中文雙語Fran?ais
Lifestyle
Home / Lifestyle / Health

Scientists explain why farm children less likely to have asthma

Xinhua | Updated: 2015-09-06 18:31

A European team on Thursday proposed a new explanation for why children growing up on farms are far better protected against asthma and allergies.

The protective effect may be created by a particular anti-inflammatory protein called A20, which the body produces upon contact with farm dust, according to the team, led by researchers from Belgium's Flanders Institute for Biotechnology (VIB) and Ghent University.

The findings, published in the leading journal Science, may represent a major step forward towards the development of an asthma vaccine.

For the study, the researchers first exposed mice to farm dust extract, a bacterial component called endotoxin, every other day for two weeks.

They then presented these mice with allergy-driving house dust mites, which often cause asthma in people, finding that mice that had been regularly exposed to endotoxin did not develop allergic features, while control mice did.

Further research found that endotoxin exposure appears to have protected the mice by squashing the ability of the animals'lung epithelial cells to generate pro-inflammatory molecules, but this protective effect only worked in the presence of the A20 protein.

"When we inactivate the A20 protein in the mucous membrane of the lungs, farm dust is no longer able to reduce an allergic or asthmatic reaction," study author Professor Hamida Hammad of VIB and Ghent University said.

These findings were then tested in patients. The results showed that people suffering from allergies and asthma have a deficiency in the protective protein A20, explaining why they react to allergens so severely.

"Discovering how farm dust provides this type of protection has certainly put us on the right track towards developing an asthma vaccine and new allergy therapies," Hammad said. "However, several years of research are required still before they will be available to patients."

Some experts cautioned that the newly uncovered mechanism does not entirely explain the protective effect of farm life.

For example, it is commonly known that drinking raw cow's milk can provide protection against allergies, but that effect is unlikely to involve the lung epithelium, Gary Huffnagle of the University of Michigan, Ann Arbor, told Science.

Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 国产成人精品曰本亚洲77美色 | 欧美日韩国产综合一区二区三区 | 特级a欧美孕妇做爰片毛片 特级a欧美做爰片毛片 | 欧美一级在线毛片免费观看 | 九九99re在线视频精品免费 | 私人毛片免费高清影视院丶 | 99久久精品国产国产毛片 | 日本精品一区二区三区在线视频 | 一区二区三区精品国产 | 午夜久久久久久久 | 日本又黄又爽又免费 | 久久久久国产精品免费网站 | 日韩在线视精品在亚洲 | 国产成人精品高清不卡在线 | 成人精品亚洲人成在线 | 久热中文字幕在线精品免费 | 午夜黄色毛片 | 欧美叫床戏做爰无遮挡 | 一区二区三区四区五区六区 | 农村寡妇一级毛片免费看视频 | www.一区二区三区.com | 性做久久久久免费观看 | 国产精品久久久久久久久久久威 | 国产精品久久国产精品99 | 欧美一级www毛片 | 一级片视频免费观看 | 一级毛片子 | 国产在线精品香蕉综合网一区 | 成人精品视频在线观看 | 一级一片一_级一片一 | 黄色毛片子 | www.日本高清.com | 一级片成人 | 精品久久久视频 | 中文毛片 | 久草手机在线观看视频 | 日本一级在线播放线观看免 | 久久精品亚洲精品一区 | 精品欧美激情在线看 | 高清精品一区二区三区一区 | 美女张开腿让男人桶爽免费网站 |