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PNAS:华人科学家开发抗体制备新方法

2017-03-16 生物谷 生物谷

抗体能够通过与细菌和病毒结合直接抑制病原体的活性或者向免疫细胞发送信号来摧毁入侵者。后一种功能使得抗体成为一种对抗癌症和其他疾病的治疗武器。但是并不是所有抗体都是一样的。由于抗体糖分子基团在结构上存在微小但非常重要的差别,两种攻击相同入侵者的抗体可能对免疫细胞的招募能力并不相同。来自马里兰大学和洛克菲勒大学的研究人员曾经开发了一种方法对抗体


抗体能够通过与细菌和病毒结合直接抑制病原体的活性或者向免疫细胞发送信号来摧毁入侵者。后一种功能使得抗体成为一种对抗癌症和其他疾病的治疗武器。

但是并不是所有抗体都是一样的。由于抗体糖分子基团在结构上存在微小但非常重要的差别,两种攻击相同入侵者的抗体可能对免疫细胞的招募能力并不相同。

来自马里兰大学和洛克菲勒大学的研究人员曾经开发了一种方法对抗体的糖分子基团结构进行修饰,为生化学家获得具有相同糖分子基团的抗体开启了大门。

在最近一项新研究中,研究人员将该方法又推进了一步,他们进一步确定了哪些糖分子的组合可以增强或抑制抗体向免疫系统发送信号的能力。相关研究结果发表在国际学术期刊PNAS上。该研究为开发对抗癌症和其他疾病的高效抗体奠定了新的基础。

抗体发送杀伤信号的能力依赖于连接在抗体上的糖分子链的结构。对于天然抗体来说,这些糖分子链存在很多可变性,即使是目前用于疾病治疗的抗体,一个给定剂量的抗体中也包含许多变体,根据糖分子基团的不同进行区分。

虽然之前的方法试图区分开这些不同变体,收集最有效的一部分,但是这些方法都比较耗时且昂贵,并且不是百分百有效。该研究所使用的方法能够保证研究人员通过生化技术获得具有相同糖分子基团的抗体,每一种带糖分子基团的抗体都能进行独立检测观察是否能够增强或抑制免疫应答。

目前市场上多数抗体都是用于治疗癌症或自身免疫疾病。研究人员表示他们的方法可以通过直接对抗体进行修饰对市场上现有的抗体进行改进,而不需要在基因水平上进行操作。

原始出处:

Tiezheng Li, et al.Modulating IgG effector function by Fc glycan engineering.PNAS.doi: 10.1073/pnas.1702173114.

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    2018-01-10 drwjr
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    2017-03-17 半夏微凉

    学习了谢谢分享

    0

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    2017-03-16 1e15b6fem30(暂无匿称)

    很好的学习资料,谢谢了。

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1855971, encodeId=cb6618559e1f6, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Wed Jan 10 08:32:00 CST 2018, time=2018-01-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1903193, encodeId=597e190319322, content=<a href='/topic/show?id=e1b0583884b' target=_blank style='color:#2F92EE;'>#新方法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58388, encryptionId=e1b0583884b, topicName=新方法)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c22f171, createdName=kord1982, createdTime=Tue Jul 11 13:32:00 CST 2017, time=2017-07-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1581936, encodeId=ec8115819362f, content=<a href='/topic/show?id=830c35868ec' target=_blank style='color:#2F92EE;'>#华人#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=35868, encryptionId=830c35868ec, topicName=华人)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3f7716881423, createdName=ms4468361851264128, createdTime=Sat Mar 18 01:32:00 CST 2017, time=2017-03-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=180491, encodeId=deca180491e1, content=学习了谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo5nmIH5IQqCKjJgSCuicPWUWOUcdqt1ROPnEiaOYN4pSHibDv8la3OxNLalvuvUXn8clpJlrpuyTpckgt9OPkeSSdT/0, createdBy=8fd71930726, createdName=半夏微凉, createdTime=Fri Mar 17 06:03:49 CST 2017, time=2017-03-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=180395, encodeId=3711180395b0, content=很好的学习资料,谢谢了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161026/IMG58107C0F82E499574.jpg, createdBy=00e81970035, createdName=1e15b6fem30(暂无匿称), createdTime=Thu Mar 16 19:30:35 CST 2017, time=2017-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=180390, encodeId=5de818039063, content=学习了,非常好的研究,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6b0d1671629, createdName=1de11f7fm56(暂无匿称), createdTime=Thu Mar 16 19:15:25 CST 2017, time=2017-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=180382, encodeId=26b2180382f5, content=谢谢分享,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6Nx0VGA4QMDzOP8oAgnV4h51EjSfehJ9QxyiaSmw8PB56BhY8KXFSxHCibXrzcy4abrzSibXQPxJ9kzrLcJyhhB8a/0, createdBy=1d3b1672603, createdName=明月清辉, createdTime=Thu Mar 16 18:31:16 CST 2017, time=2017-03-16, status=1, ipAttribution=)]
    2017-03-16 1de11f7fm56(暂无匿称)

    学习了,非常好的研究,谢谢分享

    0

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    2017-03-16 明月清辉

    谢谢分享,学习了

    0

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