STM:科学家揭示中药常山抗疟机理

2015-05-21 佚名 新华网

一个国际研究小组20日说,他们破解了传统中药常山的抗疟机理,在此基础上有望开发出安全、有效的新一代抗疟药。这项成果发表在新一期美国《科学转化医学》杂志上。中药常山是虎耳草科植物常山的根,在中国用于治疗疟疾可追溯至2000多年前,但其毒性较大,临床应用受限。负责研究的哈佛大学助理教授拉尔夫·马齐切克告诉新华社记者,常山可能是最古老的抗疟药,基于常山活性成分常山碱开发的一些合成化合物如常山酮的抗疟效果

一个国际研究小组20日说,他们破解了传统中药常山的抗疟机理,在此基础上有望开发出安全、有效的新一代抗疟药。

这项成果发表在新一期美国《科学转化医学》杂志上。中药常山是虎耳草科植物常山的根,在中国用于治疗疟疾可追溯至2000多年前,但其毒性较大,临床应用受限。

负责研究的哈佛大学助理教授拉尔夫·马齐切克告诉新华社记者,常山可能是最古老的抗疟药,基于常山活性成分常山碱开发的一些合成化合物如常山酮的抗疟效果与青蒿素一样好,但人们并不清楚其作用原理,也不了解怎样减轻它的毒副作用,限制了对其进一步利用。

为此,马齐切克领衔的研究小组分析了两种对常山碱有着高度耐药性的疟原虫的基因组序列,结果发现,这两种疟原虫中唯一的共同变异是一个编码脯氨酰tRNA合成酶的基因。进一步研究显示,这个合成酶就是常山碱的药物标靶,是常山碱遏制疟原虫感染的关键所在。

研究人员就此开发出一种名为halofuginol的化合物,并利用它治疗感染疟疾的小鼠。结果显示,该化合物有效减少了疟原虫感染,接受治疗的小鼠没有出现严重副作用。

“这证明,可以研发出耐受性更好的常山碱类似物。”马齐切克还说:“如果一切顺利,我们预计5到10年内将有一种相关药物进入临床应用。”

疟疾是一种由疟原虫引起的急性传染病,多由蚊子叮咬传播。全球每年有超过60万人死于疟疾,其中多数是非洲5岁以下儿童。目前最有效的抗疟药物是,同样在传统中药基础上开发出的青蒿素。但由于东南亚部分地区的疟原虫已发展出对青蒿素的抗药性,有必要尽快开发出新一代抗疟药。

不过,MedSci也注意到在早年国内从中药中筛选有效的抗疟疾药物时,早就注意到常山这种药物,因为它是几千来与青蒿一样,被文献记录具有抗疟疾作用的。然而,在中药筛查中,却得出这样的结果,“遍布全国60多个单位的500多名科研人员开始研发抗疟新药。中药部分的不同研究小组开始尝试多种中药,包括常山、乌头、乌梅、鳖甲、青蒿等成千上万种中药,筛选出的4万多种抗疟疾的化合物和中草药,均未能有令人满意的效果。”。如今,美国学者从常山中觅得真经。传统的中药宝库中可能还存在大量有价值的药物,先前认为“没有效果”也许是研究方法不合理,或提取方式不合理,有必要对中药进行重新研究。

原始出处:

Jonathan D. Herman1,2,3,4,5,*, Lauren R. Pepper6,*, Joseph F. Cortese1, Guillermina Estiu7,8,†, Kevin Galinsky1, Vanessa Zuzarte-Luis9, Emily R. Derbyshire10, Ulf Ribacke2, Amanda K. Lukens1,2, Sofia A. Santos11,12, Vishal Patel10, Clary B. Clish1, William J. Sullivan Jr.13, Huihao Zhou14, Selina E. Bopp2, Paul Schimmel14,15, Susan Lindquist6,16, Jon Clardy1,10, Maria M. Mota9, Tracy L. Keller17, Malcolm Whitman17, Olaf Wiest7,8,18, Dyann F. Wirth1,2,‡ and Ralph Mazitschek1,2,11,‡ .The cytoplasmic prolyl-tRNA synthetase of the malaria parasite is a dual-stage target of febrifugine and its analogs.Sci Transl Med 20 May 2015.DOI: 10.1126/scitranslmed.aaa3575 

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  1. [GetPortalCommentsPageByObjectIdResponse(id=156946, encodeId=fbe715694688, content=真的是值得人兴奋, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83ep3KyYH7kyqVwUwK81ibQRkWMqRMVwerlwD2Ie9byeRp2RL9wKmLgoNwShDTdTNL8RQHfhDsAt0N9A/132, createdBy=99b61684657, createdName=小康子70, createdTime=Sat Nov 19 23:53:36 CST 2016, time=2016-11-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1677959, encodeId=fd4f16e79592b, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Sun Jul 19 23:49:00 CST 2015, time=2015-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=27936, encodeId=83252e936b5, content=有点复杂,, beContent=null, objectType=article, channel=null, level=null, likeNumber=160, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2d031628224, createdName=huangsong808, createdTime=Wed Jun 17 11:56:00 CST 2015, time=2015-06-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25691, encodeId=f3e82569133, content=赞, beContent=null, objectType=article, channel=null, level=null, likeNumber=147, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=14.29.100.**, createdTime=Mon Jun 01 12:01:00 CST 2015, time=2015-06-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25369, encodeId=e8bc2536920, content=研究思路好,改变了什么基因的表达, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160922/IMG57E2BD90626FC5094.jpg, createdBy=be411626712, createdName=kate138, createdTime=Sat May 30 08:51:00 CST 2015, time=2015-05-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24598, encodeId=f89924598de, content=中药牛掰, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Sat May 23 18:37:00 CST 2015, time=2015-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24510, encodeId=5c232451049, content=中药跑到国际上了,可喜可贺?, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9b131625589, createdName=2015520llm, createdTime=Thu May 21 22:51:00 CST 2015, time=2015-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24508, encodeId=993c2450846, content=加油, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=34e11612842, createdName=yuchang151, createdTime=Thu May 21 22:49:00 CST 2015, time=2015-05-21, status=1, ipAttribution=)]
    2016-11-19 小康子70

    真的是值得人兴奋

    0

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    2015-07-19 gdsun
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    2015-06-17 huangsong808

    有点复杂,

    0

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    2015-06-01 14.29.100.**

    0

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    2015-05-30 kate138

    研究思路好,改变了什么基因的表达

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=156946, encodeId=fbe715694688, content=真的是值得人兴奋, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83ep3KyYH7kyqVwUwK81ibQRkWMqRMVwerlwD2Ie9byeRp2RL9wKmLgoNwShDTdTNL8RQHfhDsAt0N9A/132, createdBy=99b61684657, createdName=小康子70, createdTime=Sat Nov 19 23:53:36 CST 2016, time=2016-11-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1677959, encodeId=fd4f16e79592b, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Sun Jul 19 23:49:00 CST 2015, time=2015-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=27936, encodeId=83252e936b5, content=有点复杂,, beContent=null, objectType=article, channel=null, level=null, likeNumber=160, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2d031628224, createdName=huangsong808, createdTime=Wed Jun 17 11:56:00 CST 2015, time=2015-06-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25691, encodeId=f3e82569133, content=赞, beContent=null, objectType=article, channel=null, level=null, likeNumber=147, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=14.29.100.**, createdTime=Mon Jun 01 12:01:00 CST 2015, time=2015-06-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25369, encodeId=e8bc2536920, content=研究思路好,改变了什么基因的表达, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160922/IMG57E2BD90626FC5094.jpg, createdBy=be411626712, createdName=kate138, createdTime=Sat May 30 08:51:00 CST 2015, time=2015-05-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24598, encodeId=f89924598de, content=中药牛掰, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Sat May 23 18:37:00 CST 2015, time=2015-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24510, encodeId=5c232451049, content=中药跑到国际上了,可喜可贺?, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9b131625589, createdName=2015520llm, createdTime=Thu May 21 22:51:00 CST 2015, time=2015-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24508, encodeId=993c2450846, content=加油, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=34e11612842, createdName=yuchang151, createdTime=Thu May 21 22:49:00 CST 2015, time=2015-05-21, status=1, ipAttribution=)]
    2015-05-23 lovejing

    中药牛掰

    0

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    2015-05-21 2015520llm

    中药跑到国际上了,可喜可贺?

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=156946, encodeId=fbe715694688, content=真的是值得人兴奋, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83ep3KyYH7kyqVwUwK81ibQRkWMqRMVwerlwD2Ie9byeRp2RL9wKmLgoNwShDTdTNL8RQHfhDsAt0N9A/132, createdBy=99b61684657, createdName=小康子70, createdTime=Sat Nov 19 23:53:36 CST 2016, time=2016-11-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1677959, encodeId=fd4f16e79592b, content=<a href='/topic/show?id=29a8168130f' target=_blank style='color:#2F92EE;'>#STM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16813, encryptionId=29a8168130f, topicName=STM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d76127619556, createdName=gdsun, createdTime=Sun Jul 19 23:49:00 CST 2015, time=2015-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=27936, encodeId=83252e936b5, content=有点复杂,, beContent=null, objectType=article, channel=null, level=null, likeNumber=160, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2d031628224, createdName=huangsong808, createdTime=Wed Jun 17 11:56:00 CST 2015, time=2015-06-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25691, encodeId=f3e82569133, content=赞, beContent=null, objectType=article, channel=null, level=null, likeNumber=147, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=14.29.100.**, createdTime=Mon Jun 01 12:01:00 CST 2015, time=2015-06-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25369, encodeId=e8bc2536920, content=研究思路好,改变了什么基因的表达, beContent=null, objectType=article, channel=null, level=null, likeNumber=137, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160922/IMG57E2BD90626FC5094.jpg, createdBy=be411626712, createdName=kate138, createdTime=Sat May 30 08:51:00 CST 2015, time=2015-05-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24598, encodeId=f89924598de, content=中药牛掰, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9e0b1603164, createdName=lovejing, createdTime=Sat May 23 18:37:00 CST 2015, time=2015-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24510, encodeId=5c232451049, content=中药跑到国际上了,可喜可贺?, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9b131625589, createdName=2015520llm, createdTime=Thu May 21 22:51:00 CST 2015, time=2015-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=24508, encodeId=993c2450846, content=加油, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=34e11612842, createdName=yuchang151, createdTime=Thu May 21 22:49:00 CST 2015, time=2015-05-21, status=1, ipAttribution=)]
    2015-05-21 yuchang151

    加油

    0

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