Science :缺乏维生素A竟可提高先天免疫?

2014-01-24 佚名 米内

营养不良会损害免疫系统,降低其强度与力量,但如今一项新的研究显示,世界上最常见的营养不良问题之一:维生素A的缺乏--可提升某种关键性免疫细胞的水平。 在世界上那些常见的营养不良地区,寄生性蠕虫感染也可能是普遍的。这就需要所谓的在粘膜表面的屏障免疫--这是一种部分由先天淋巴样细胞( ILCs )介导的免疫策略。 ILCs 似乎会对维生素A提供的信号--具体地说是该维生素的一个叫做视黄酸(RA)的代

营养不良会损害免疫系统,降低其强度与力量,但如今一项新的研究显示,世界上最常见的营养不良问题之一:维生素A的缺乏--可提升某种关键性免疫细胞的水平。

在世界上那些常见的营养不良地区,寄生性蠕虫感染也可能是普遍的。这就需要所谓的在粘膜表面的屏障免疫--这是一种部分由先天淋巴样细胞( ILCs )介导的免疫策略。 ILCs 似乎会对维生素A提供的信号--具体地说是该维生素的一个叫做视黄酸(RA)的代谢物--做出反应。

为了更好地理解视黄酸是如何影响某些 ILCs 的生长的,来自美国国家过敏和传染病研究所的研究人员在维生素A缺乏的小鼠(在这些小鼠中,RA信号传导是阙如的)中研究了 ILCs 亚群的行为。

他们发现,在这些小鼠中,ILC的某些亚群(即那些对细菌免疫重要的亚群)大大地减少了,而另外某些亚群,尤其是ILC2s,则出现数目的增长(后来发现,ILC2s因缺乏RA受体而可在没有维生素A存在的情况下增生。它们对保护机体免受寄生性蠕虫感染起着重要的作用)。

研究结果显示机体会如何切换到一种不同的免疫类型,即使当机体缺乏重要的营养资源时也能让宿主活着。维生素A缺乏会使免疫系统倾斜,使得它做好准备以保护机体免受寄生性蠕虫的感染,而后者是维生素A缺乏症流行地区的一个重大问题。

原文出处:

S. P. Spencer, C. Wilhelm, Q. Yang, J. A. Hall, N. Bouladoux, A. Boyd, T. B. Nutman, J. F. Urban Jr.,J. Wang, T. R. Ramalingam, A. Bhandoola, T. A. Wynn, and Y. Belkaid. Adaptation of Innate Lymphoid Cells to a Micronutrient Deficiency Promotes Type 2 BarrierImmunity. Science, 24 January 2014;

评论区 (3)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1374822, encodeId=f5e713e4822d6, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=17a3387, createdName=jichang, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419998, encodeId=489e1419998c6, content=<a href='/topic/show?id=ae62e905291' target=_blank style='color:#2F92EE;'>#维生素A#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79052, encryptionId=ae62e905291, topicName=维生素A)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c60e3553736, createdName=wwzzly, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1585810, encodeId=a6bc1585810fa, content=<a href='/topic/show?id=4ec1285864b' target=_blank style='color:#2F92EE;'>#先天免疫#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28586, encryptionId=4ec1285864b, topicName=先天免疫)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=50ec17296275, createdName=liubm561, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=)]
    2014-01-26 jichang

    #SCIE#

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=1374822, encodeId=f5e713e4822d6, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=17a3387, createdName=jichang, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419998, encodeId=489e1419998c6, content=<a href='/topic/show?id=ae62e905291' target=_blank style='color:#2F92EE;'>#维生素A#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79052, encryptionId=ae62e905291, topicName=维生素A)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c60e3553736, createdName=wwzzly, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1585810, encodeId=a6bc1585810fa, content=<a href='/topic/show?id=4ec1285864b' target=_blank style='color:#2F92EE;'>#先天免疫#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28586, encryptionId=4ec1285864b, topicName=先天免疫)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=50ec17296275, createdName=liubm561, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=)]
    2014-01-26 wwzzly
  3. [GetPortalCommentsPageByObjectIdResponse(id=1374822, encodeId=f5e713e4822d6, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=17a3387, createdName=jichang, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1419998, encodeId=489e1419998c6, content=<a href='/topic/show?id=ae62e905291' target=_blank style='color:#2F92EE;'>#维生素A#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79052, encryptionId=ae62e905291, topicName=维生素A)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c60e3553736, createdName=wwzzly, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1585810, encodeId=a6bc1585810fa, content=<a href='/topic/show?id=4ec1285864b' target=_blank style='color:#2F92EE;'>#先天免疫#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28586, encryptionId=4ec1285864b, topicName=先天免疫)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=50ec17296275, createdName=liubm561, createdTime=Sun Jan 26 02:29:00 CST 2014, time=2014-01-26, status=1, ipAttribution=)]
    2014-01-26 liubm561

相关资讯

Oncogenesis:揭示维生素A降低前列腺癌干细胞侵袭性机制

在一项研究中,来自英国约克大学和赫尔大学的研究人员发现维生素A能够有助于治疗和阻止前列腺癌扩散.相关研究结果于2013年4月15日在线发表在Oncogenesis期刊上,论文标题为"Retinoic acid represses invasion and stem cell phenotype by induction of the metastasis suppressors RARRES1 a