PNAS:CD8T细胞也有“生物钟”,免疫反应效率大不同

2019-09-28 顾露露 生物探索

人体的免疫系统就是我们“防卫网络”,当发现入侵者时它就会不断发出警报。这些入侵者要么是不同的感染性微生物(病毒、细菌、寄生虫),要么是已经癌变的自身细胞。而其中一种免疫细胞——CD8 T淋巴细胞是对抗感染和癌症的关键细胞,其对异源成分的识别会引发多种免疫反应,从而消除病原体或癌细胞。

人体的免疫系统就是我们“防卫网络”,当发现入侵者时它就会不断发出警报。这些入侵者要么是不同的感染性微生物(病毒、细菌、寄生虫),要么是已经癌变的自身细胞。而其中一种免疫细胞——CD8 T淋巴细胞是对抗感染和癌症的关键细胞,其对异源成分的识别会引发多种免疫反应,从而消除病原体或癌细胞。

我们知道,机体的许多方面都存在24小时(昼夜节律)节律:睡眠-觉醒周期、进食、激素、体温等。这些昼夜节律使生物体能够很好地适应环境的周期性变化(昼夜周期,季节)。昼夜节律是由生物钟产生的,生物钟由“时钟基因”组成,会影响大多数器官和细胞。这当中就包括我们免疫系统的细胞,其功能在白天和黑夜中都会变化。

近日,根据《美国国家科学院院刊》(PNAS)杂志上发表的一项研究,生物钟会影响免疫反应的效力。也就是说,以CD8 T细胞为例,它们的功能因时间差异而大不相同。

这项研究是由加拿大道格拉斯研究中心的Nicolas Cermakian博士和Maisonneuve-Rosemont医院研究中心的Nathalie Labrecque博士领导的研究小组所进行的。

在早期的研究中,该团队已经证明,T细胞对异物的反应或多或少取决于时段,但生物钟在这一现象中的作用仍未可知。研究人员使用小鼠模型观察到,接种疫苗后,CD8 T细胞的反应强度随时间而变化。相反,CD8 T细胞在缺乏时钟基因的小鼠中,这种昼夜节律被消除了,白天对疫苗的反应也减弱了。



这项研究表明,T细胞更容易在一天的特定时间被激活。确定生物钟调节T细胞反应的机制将有助于更好地理解调节T细胞最佳反应的过程。这一知识将帮助改进疫苗接种策略和癌症免疫治疗。

原始出处:

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (4)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1856345, encodeId=d33e1856345e5, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Fri Feb 14 00:30:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2028037, encodeId=5d44202803e43, content=<a href='/topic/show?id=f44243e2da' target=_blank style='color:#2F92EE;'>#CD8T细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4372, encryptionId=f44243e2da, topicName=CD8T细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7dc7399, createdName=apoenzyme, createdTime=Sat Apr 25 00:30:00 CST 2020, time=2020-04-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280199, encodeId=96c812801997d, content=<a href='/topic/show?id=2bbe289846f' target=_blank style='color:#2F92EE;'>#免疫反应#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28984, encryptionId=2bbe289846f, topicName=免疫反应)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=827b160, createdName=cnxcy, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1605399, encodeId=5b13160539990, content=<a href='/topic/show?id=94c9436340' target=_blank style='color:#2F92EE;'>#CD8#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4363, encryptionId=94c9436340, topicName=CD8)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4bac19388006, createdName=ms691033630344116, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=)]
    2020-02-14 drwjr
  2. [GetPortalCommentsPageByObjectIdResponse(id=1856345, encodeId=d33e1856345e5, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Fri Feb 14 00:30:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2028037, encodeId=5d44202803e43, content=<a href='/topic/show?id=f44243e2da' target=_blank style='color:#2F92EE;'>#CD8T细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4372, encryptionId=f44243e2da, topicName=CD8T细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7dc7399, createdName=apoenzyme, createdTime=Sat Apr 25 00:30:00 CST 2020, time=2020-04-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280199, encodeId=96c812801997d, content=<a href='/topic/show?id=2bbe289846f' target=_blank style='color:#2F92EE;'>#免疫反应#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28984, encryptionId=2bbe289846f, topicName=免疫反应)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=827b160, createdName=cnxcy, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1605399, encodeId=5b13160539990, content=<a href='/topic/show?id=94c9436340' target=_blank style='color:#2F92EE;'>#CD8#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4363, encryptionId=94c9436340, topicName=CD8)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4bac19388006, createdName=ms691033630344116, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1856345, encodeId=d33e1856345e5, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Fri Feb 14 00:30:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2028037, encodeId=5d44202803e43, content=<a href='/topic/show?id=f44243e2da' target=_blank style='color:#2F92EE;'>#CD8T细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4372, encryptionId=f44243e2da, topicName=CD8T细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7dc7399, createdName=apoenzyme, createdTime=Sat Apr 25 00:30:00 CST 2020, time=2020-04-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280199, encodeId=96c812801997d, content=<a href='/topic/show?id=2bbe289846f' target=_blank style='color:#2F92EE;'>#免疫反应#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28984, encryptionId=2bbe289846f, topicName=免疫反应)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=827b160, createdName=cnxcy, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1605399, encodeId=5b13160539990, content=<a href='/topic/show?id=94c9436340' target=_blank style='color:#2F92EE;'>#CD8#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4363, encryptionId=94c9436340, topicName=CD8)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4bac19388006, createdName=ms691033630344116, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1856345, encodeId=d33e1856345e5, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Fri Feb 14 00:30:00 CST 2020, time=2020-02-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2028037, encodeId=5d44202803e43, content=<a href='/topic/show?id=f44243e2da' target=_blank style='color:#2F92EE;'>#CD8T细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4372, encryptionId=f44243e2da, topicName=CD8T细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7dc7399, createdName=apoenzyme, createdTime=Sat Apr 25 00:30:00 CST 2020, time=2020-04-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280199, encodeId=96c812801997d, content=<a href='/topic/show?id=2bbe289846f' target=_blank style='color:#2F92EE;'>#免疫反应#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28984, encryptionId=2bbe289846f, topicName=免疫反应)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=827b160, createdName=cnxcy, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1605399, encodeId=5b13160539990, content=<a href='/topic/show?id=94c9436340' target=_blank style='color:#2F92EE;'>#CD8#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4363, encryptionId=94c9436340, topicName=CD8)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4bac19388006, createdName=ms691033630344116, createdTime=Mon Sep 30 12:30:00 CST 2019, time=2019-09-30, status=1, ipAttribution=)]