武汉病毒所利用多肽抑制剂成功阻断乙脑和寨卡病毒感染

2017-03-03 佚名 武汉病毒研究所

乙脑病毒(Japanese encephalitis virus,JEV)和寨卡病毒(zika virus,ZIKV)属于黄病毒科黄病毒属,是通过蚊虫进行传播的虫媒病毒。JEV 引起的乙型脑炎致死致残率高,我国是乙脑的高发区,发病人数曾一度占世界总数的 80%。目前 JEV 疫苗的使用在一定程度上减少了乙脑的发病率,但是对于已发病的患者,仍然没有针对 JEV 的特效药或治疗手段。而 ZIKV 自

乙脑病毒(Japanese encephalitis virus,JEV)和寨卡病毒(zika virus,ZIKV)属于黄病毒科黄病毒属,是通过蚊虫进行传播的虫媒病毒。JEV 引起的乙型脑炎致死致残率高,我国是乙脑的高发区,发病人数曾一度占世界总数的 80%。目前 JEV 疫苗的使用在一定程度上减少了乙脑的发病率,但是对于已发病的患者,仍然没有针对 JEV 的特效药或治疗手段。而 ZIKV 自 2015 年 5 月起,从巴西开始暴发并迅速向热带和温带地区蔓延。除了依靠蚊媒传播外,ZIKV 还可以在人与人之间通过性传播或者母婴垂直传播,导致新生儿小头畸形。2016 年 2 月,世界卫生组织(WHO)宣布 ZIKV 疫情为“国际卫生紧急事件”,虽然在同年 11 月份 WHO 宣布解除警戒,但强调国际社会仍需做好与 ZIKV 打“持久战”的准备。因此,寻找治疗 JEV 和 ZIKV 感染的特效药物是目前刻不容缓的任务。

黄病毒包膜蛋白 E 蛋白在介导病毒进入细胞过程中发挥重要作用。E 蛋白分为三个结构域 domain I,II,III,在 domain III 和跨膜域之间有一段由两个α螺旋组成的茎区。在病毒囊膜与细胞膜融合的过程中,茎区发生回折,以类似“拉拉链”的方式填补于 E 蛋白 domain II 间隙,牵引病毒囊膜与细胞膜靠近,驱动膜融合的发生。

基于黄病毒包膜 E 蛋白茎区在膜融合中的重要作用,中国科学院武汉病毒研究所病毒生物化学学科组研究人员设计了一系列源自 JEV 和 ZIKV 茎区的多肽,考察其抗病毒功效。结果发现源自茎区第二个螺旋的多肽的抗病毒作用优于第一个螺旋;在 JEV 试验中,包含茎区末端 7 个氨基酸的多肽的抗 JEV 效果与不包含这 7 个氨基酸的多肽效果相当;而 ZIKV 试验发现末端 7 个氨基酸至关重要,缺失这 7 个氨基酸的多肽不能抑制 ZIKV 感染。在所有测试的多肽中,源自 JEV 的多肽 P5 抗病毒能力最佳,对 JEV 和 ZIKV 的有效抑制剂量达到纳摩尔级别,半数抑制浓度(IC50)分别是 3.93 nM 和 70 nM。动物实验证实 P5 能降低 JEV 的致死率,减轻脑部病理变化和炎症反应。利用干扰素受体缺失小鼠(AG6)建立 ZIKV 感染模型,证实 P5 能显着降低 ZIKV 感染后小鼠脑和睾丸中的病毒滴度,减轻 ZIKV 引起的病理性改变。

该研究证实多肽 P5 在体内和体外均能有效抑制 JEV 和 ZIKV 感染,有效浓度达到纳摩尔级别。基于其明确的作用靶点、高效的病毒抑制率以及多肽抑制剂良好的生物相容性,该实验提供了一个新型高效的临床治疗 JEV 和 ZIKV 感染的先导药物。

该研究成果发表于《抗病毒研究》(Antiviral Research)。第一作者为硕士生陈黎曼,通讯作者为副研究员王薇。该研究得到了国家自然科学基金项目的资助(31670165,31000089)。

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    2017-06-03 jklm09
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    2017-03-06 stupidox

    这个很有价值

    0

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  5. [GetPortalCommentsPageByObjectIdResponse(id=1851390, encodeId=860c18513906f, content=<a href='/topic/show?id=f0a254918f0' target=_blank style='color:#2F92EE;'>#抑制剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54918, encryptionId=f0a254918f0, topicName=抑制剂)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=44a360, createdName=jklm09, createdTime=Sat Jun 03 16:46:00 CST 2017, time=2017-06-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1710056, encodeId=a6311e1005665, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Tue Sep 19 08:46:00 CST 2017, time=2017-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=178655, encodeId=00931e865521, content=这个很有价值, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=48ce1618316, createdName=stupidox, createdTime=Mon Mar 06 07:19:57 CST 2017, time=2017-03-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1360061, encodeId=f9641360061f8, content=<a href='/topic/show?id=6783466083f' target=_blank style='color:#2F92EE;'>#寨卡病毒#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46608, encryptionId=6783466083f, topicName=寨卡病毒)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1512904, encodeId=593c15129043a, content=<a href='/topic/show?id=f0364660360' target=_blank style='color:#2F92EE;'>#寨卡#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46603, encryptionId=f0364660360, topicName=寨卡)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d79610514526, createdName=12498710m14暂无昵称, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1530037, encodeId=5e1a153003e82, content=<a href='/topic/show?id=fd6f4340017' target=_blank style='color:#2F92EE;'>#多肽#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43400, encryptionId=fd6f4340017, topicName=多肽)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cdb812012363, createdName=fusion, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1620407, encodeId=8035162040e2a, content=<a href='/topic/show?id=919f6333047' target=_blank style='color:#2F92EE;'>#武汉病毒所#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=63330, encryptionId=919f6333047, topicName=武汉病毒所)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5f9b20112907, createdName=gj0738, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1851390, encodeId=860c18513906f, content=<a href='/topic/show?id=f0a254918f0' target=_blank style='color:#2F92EE;'>#抑制剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54918, encryptionId=f0a254918f0, topicName=抑制剂)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=44a360, createdName=jklm09, createdTime=Sat Jun 03 16:46:00 CST 2017, time=2017-06-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1710056, encodeId=a6311e1005665, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Tue Sep 19 08:46:00 CST 2017, time=2017-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=178655, encodeId=00931e865521, content=这个很有价值, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=48ce1618316, createdName=stupidox, createdTime=Mon Mar 06 07:19:57 CST 2017, time=2017-03-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1360061, encodeId=f9641360061f8, content=<a href='/topic/show?id=6783466083f' target=_blank style='color:#2F92EE;'>#寨卡病毒#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46608, encryptionId=6783466083f, topicName=寨卡病毒)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1512904, encodeId=593c15129043a, content=<a href='/topic/show?id=f0364660360' target=_blank style='color:#2F92EE;'>#寨卡#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46603, encryptionId=f0364660360, topicName=寨卡)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d79610514526, createdName=12498710m14暂无昵称, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1530037, encodeId=5e1a153003e82, content=<a href='/topic/show?id=fd6f4340017' target=_blank style='color:#2F92EE;'>#多肽#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43400, encryptionId=fd6f4340017, topicName=多肽)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cdb812012363, createdName=fusion, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1620407, encodeId=8035162040e2a, content=<a href='/topic/show?id=919f6333047' target=_blank style='color:#2F92EE;'>#武汉病毒所#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=63330, encryptionId=919f6333047, topicName=武汉病毒所)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5f9b20112907, createdName=gj0738, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=)]
    2017-03-05 fusion
  7. [GetPortalCommentsPageByObjectIdResponse(id=1851390, encodeId=860c18513906f, content=<a href='/topic/show?id=f0a254918f0' target=_blank style='color:#2F92EE;'>#抑制剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54918, encryptionId=f0a254918f0, topicName=抑制剂)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=44a360, createdName=jklm09, createdTime=Sat Jun 03 16:46:00 CST 2017, time=2017-06-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1710056, encodeId=a6311e1005665, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Tue Sep 19 08:46:00 CST 2017, time=2017-09-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=178655, encodeId=00931e865521, content=这个很有价值, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=48ce1618316, createdName=stupidox, createdTime=Mon Mar 06 07:19:57 CST 2017, time=2017-03-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1360061, encodeId=f9641360061f8, content=<a href='/topic/show?id=6783466083f' target=_blank style='color:#2F92EE;'>#寨卡病毒#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46608, encryptionId=6783466083f, topicName=寨卡病毒)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1512904, encodeId=593c15129043a, content=<a href='/topic/show?id=f0364660360' target=_blank style='color:#2F92EE;'>#寨卡#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46603, encryptionId=f0364660360, topicName=寨卡)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d79610514526, createdName=12498710m14暂无昵称, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1530037, encodeId=5e1a153003e82, content=<a href='/topic/show?id=fd6f4340017' target=_blank style='color:#2F92EE;'>#多肽#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43400, encryptionId=fd6f4340017, topicName=多肽)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cdb812012363, createdName=fusion, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1620407, encodeId=8035162040e2a, content=<a href='/topic/show?id=919f6333047' target=_blank style='color:#2F92EE;'>#武汉病毒所#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=63330, encryptionId=919f6333047, topicName=武汉病毒所)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5f9b20112907, createdName=gj0738, createdTime=Sun Mar 05 06:46:00 CST 2017, time=2017-03-05, status=1, ipAttribution=)]