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JACI:懒人们注意了!屋尘螨危害大可造成肺损伤

2016-05-07 生物谷 生物谷

屋尘螨是室内灰尘中过敏原的主要来源,会引起成人和儿童发生哮喘。来自美国MIT和新加坡国立大学的研究人员发现屋尘螨造成的危害比预想的更大。它们会诱导DNA损伤,如果DNA损伤不能得到充分修复会对肺细胞造成致命伤害。   这些发现表明DNA修复能力可能是导致哮喘病人发生哮喘相关疾病出现风险增加的一个易感因素。   DNA损伤是哮喘发病过程中的一个步骤,能够潜在地加重哮

屋尘螨是室内灰尘中过敏原的主要来源,会引起成人和儿童发生哮喘。来自美国MIT和新加坡国立大学的研究人员发现屋尘螨造成的危害比预想的更大。它们会诱导DNA损伤,如果DNA损伤不能得到充分修复会对肺细胞造成致命伤害。
 
这些发现表明DNA修复能力可能是导致哮喘病人发生哮喘相关疾病出现风险增加的一个易感因素。
 
DNA损伤是哮喘发病过程中的一个步骤,能够潜在地加重哮喘病情。除了激活免疫应答,病人的DNA修复能力也可能影响疾病进展。对DNA修复能力进行筛查或可用作预测严重哮喘疾病发生的一种手段。
 
相关研究结果发表在国际学术期刊Journal of Allergy and Clinical Immunology上。
 
机体对一些过敏原如尘螨、花粉以及宠物毛发产生过度的免疫应答就可能触发哮喘。免疫细胞涌入肺部分泌细胞因子,促进炎症和平滑肌收缩,导致气道变窄引起呼吸困难。全世界有超过三亿人受到哮喘影响。
 
由于尘螨无所不在并且特别容易在温暖潮湿的环境中滋生,因此该研究团队着重对尘螨诱导的过敏反应进行了研究。尘螨会引起过敏症状,比如打喷嚏,流眼泪,还会对一些敏感体质的人造成过敏性哮喘。高达85%的哮喘病人都对尘螨过敏,导致尘螨成为过敏性哮喘的主要触发因素。
 
研究人员将小鼠暴露在有尘螨的环境中,诱导类似哮喘的症状,结果发现了一条促进哮喘发生的新途径。尘螨会引起小鼠产生RONS(reactive oxygen and nitrogen species),造成DNA及其他生物分子的损伤。利用一种叫做NU7441的药物抑制DNA损伤修复,可以发现DNA损伤和细胞死亡加剧。每个人的DNA损伤修复能力都不相同,因此这项研究表明DNA修复能力较差的哮喘病人更易发生哮喘诱导的炎症和组织损伤。
 
虽然尘螨造成DNA损伤的机制尚未明了,但研究人员发现尘螨可以直接诱导培养细胞发生DNA损伤。这表明尘螨不仅可以诱导免疫应答,还可以直接造成肺上皮细胞发生DNA损伤。如果DNA修复受到抑制,这种损伤效应会进一步放大。
 
这项研究提示用抗氧化剂中和RONS治疗哮喘病人是具有可行性的,研究人员目前正在以小鼠为模型对这种可行性进行进一步验证。
  
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    2016-05-09 卡莲

    可怕螨虫

    0

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    2016-05-09 卡莲

    需要勤晒被子

    0

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    2016-05-09 tastas
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    2016-05-09 jaysppr

    需要晒被子了,

    0

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    2016-05-09 ssummer

    除螨方法

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=85081, encodeId=4a03850817f, content=可怕螨虫, beContent=null, objectType=article, channel=null, level=null, likeNumber=138, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e4e21675717, createdName=卡莲, createdTime=Mon May 09 17:13:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=85082, encodeId=4a2d850821e, content=需要勤晒被子, beContent=null, objectType=article, channel=null, level=null, likeNumber=129, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e4e21675717, createdName=卡莲, createdTime=Mon May 09 17:13:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1348569, encodeId=32d21348569c7, content=<a href='/topic/show?id=54c24e71237' target=_blank style='color:#2F92EE;'>#屋尘螨#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=47712, encryptionId=54c24e71237, topicName=屋尘螨)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4dfa37, createdName=huhuaidong387, createdTime=Mon May 09 12:37:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1397008, encodeId=bff6139e0084b, content=<a href='/topic/show?id=8bee565436d' target=_blank style='color:#2F92EE;'>#损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56543, encryptionId=8bee565436d, topicName=损伤)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eoNX3lUOlDKGBUEPNwZx0nibmdcFyeibnX4WMhUSCU2REpGRWtSmnT2CCs0dA5waxvJknYDxwtYnIcQ/132, createdBy=294e2500218, createdName=ms3046638856685384, createdTime=Mon May 09 12:37:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1503298, encodeId=d2331503298b3, content=<a href='/topic/show?id=67a7821250e' target=_blank style='color:#2F92EE;'>#肺损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=82125, encryptionId=67a7821250e, topicName=肺损伤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=05329610584, createdName=tastas, createdTime=Mon May 09 12:37:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=84943, encodeId=bd76849434c, content=需要晒被子了,, beContent=null, objectType=article, channel=null, level=null, likeNumber=123, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/PiajxSqBRaEIsrUxHnicsiaqwzJibCks60HOicbEAgbNzUiciboMJDzsWg16OHTeNHhyYvTg6TDXTlOx7icnhttCYYe2ujYt0yND7dYusOsibl9XnQCE/0, createdBy=7ad21722200, createdName=jaysppr, createdTime=Mon May 09 10:39:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=84908, encodeId=3ccb84908d7, content=除螨方法, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLRP2D8sTDxkrGNjMqwyLUGd9Wbt6L0Yw9goia4ibPGLEx48lF9kvw86FKicbdWemTqujrf6K5WPIic8g/132, createdBy=69a11636814, createdName=ssummer, createdTime=Mon May 09 08:55:00 CST 2016, time=2016-05-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=84784, encodeId=9e6084e8406, content=可怕的螨虫, beContent=null, objectType=article, channel=null, level=null, likeNumber=166, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0d231626576, createdName=jjzouyan, createdTime=Sun May 08 18:00:00 CST 2016, time=2016-05-08, status=1, ipAttribution=)]
    2016-05-08 jjzouyan

    可怕的螨虫

    0

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