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Sci Trans Med:一种真菌通过调节宿主嘌呤代谢加剧小鼠肠炎。

2017-03-09 zhangchengli MedSci原创

炎症性肠病(IBD)是一种自身免疫性疾病,包括溃疡性结肠炎和克罗恩病,其特征在于胃肠道的慢性炎症,临床上常表现为严重的腹泻、疼痛、疲劳和体重减轻。过去几十年,医生已经开始利用特异性的抗酿酒酵母细胞壁抗体来区分克罗恩病和溃疡性结肠炎,但是酵母对IBD的作用仍然还不清楚。

炎症性肠病(IBD)是一种自身免疫性疾病,包括溃疡性结肠炎和克罗恩病,其特征在于胃肠道的慢性炎症,临床上常表现为严重的腹泻、疼痛、疲劳和体重减轻。过去几十年,医生已经开始利用特异性的抗酿酒酵母细胞壁抗体来区分克罗恩病和溃疡性结肠炎,但是酵母对IBD的作用仍然还不清楚。

在过去10年中,关于微生物组对人类健康的影响的研究如“雨后春笋”涌现,但是绝大多数都集中在细菌。近期,来自美国犹他大学的科学家通过小鼠研究证实了酵母在加重IBD的症状中的作用。他们的工作表明,一种已经在市场上存在的仿制药—别嘌呤醇可以提供一些缓解作用。该项研究的结果发表在3月8号这一期的 Science Translational Medicine杂志上。

研究结果表明,在小鼠结肠炎模型中,酿酒酵母加剧了肠道疾病并增加了肠屏障的通透性。对接种酿酒酵母或另一种真菌—深红酵母的无菌小鼠的结肠组织进行转录组分析显示,酿酒酵母定植影响肠屏障和宿主代谢。无菌小鼠的粪便代谢组学筛选表明,酿酒酵母定植增强了宿主的嘌呤代谢,导致尿酸产生增加。单独抗尿酸治疗导致疾病恶化,并增加肠道通透性。一种用于减少尿酸的临床药物—别嘌醇,改善了小鼠中酿酒酵母诱导的结肠炎。此外,研究者还发现人类血清中尿酸和抗酵母抗体浓度呈现正相关。因此,肠道中的酵母可能能够增强炎症性肠病的病程中不利代谢产物的产生。未来仍然需要进行临床试验,验证酵母在人中是否会加重IBD。

原始出处:

Tyson R. Chiaro, Ray Soto, W. Zac Stephens, et al. A member of the gut mycobiota modulates host purine metabolism exacerbating colitis in mice. Science Translational Medicine, 2017. DOI: 10.1126/scitranslmed.aaf9044


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    2017-12-11 bsmagic9140
  2. [GetPortalCommentsPageByObjectIdResponse(id=1656749, encodeId=b2591656e491d, content=<a href='/topic/show?id=3ca31e71903' target=_blank style='color:#2F92EE;'>#TRA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17719, encryptionId=3ca31e71903, topicName=TRA)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=757b24868428, createdName=bsmagic9140, createdTime=Mon Dec 11 04:40:00 CST 2017, time=2017-12-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=181864, encodeId=b2ee18186415, content=万万没想到,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=124, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=28761705280, createdName=cuiyejia, createdTime=Wed Mar 22 08:13:27 CST 2017, time=2017-03-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=179356, encodeId=f0bf1e9356a5, content=好东西,谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=28761705280, createdName=cuiyejia, createdTime=Sun Mar 12 13:57:38 CST 2017, time=2017-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1353703, encodeId=b2981353e03ac, content=<a href='/topic/show?id=dddce266537' target=_blank style='color:#2F92EE;'>#真菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72665, encryptionId=dddce266537, topicName=真菌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Sat Mar 11 00:40:00 CST 2017, time=2017-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1404663, encodeId=5a641404663aa, content=<a href='/topic/show?id=1a4f4649925' target=_blank style='color:#2F92EE;'>#宿主#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46499, encryptionId=1a4f4649925, topicName=宿主)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/08904ED76550A0090DB220A7FB81D755/100, createdBy=78512492586, createdName=wincls, createdTime=Sat Mar 11 00:40:00 CST 2017, time=2017-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1607284, encodeId=a50e160e28402, content=<a href='/topic/show?id=eb6b1145939' target=_blank style='color:#2F92EE;'>#Med#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11459, encryptionId=eb6b1145939, topicName=Med)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=552a19396740, createdName=ms3994565386320060, createdTime=Sat Mar 11 00:40:00 CST 2017, time=2017-03-11, status=1, ipAttribution=)]
    2017-03-22 cuiyejia

    万万没想到,学习了。

    0

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    2017-03-12 cuiyejia

    好东西,谢分享

    0

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    2017-03-11 zhaojie88
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    2017-03-11 wincls
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