PNAS:去除癌细胞表面唾液酸或成抗癌新疗法

2016-08-26 Carolyn R. Bertozzi PNAS

非特

非特异性癌症免疫疗法通过激活人体先天免疫系统来摧毁癌细胞,但在治疗中的效果因人而异。美国斯坦福大学研究人员最新发现,通过去除乳腺癌细胞表面的某些糖,可以提高现有非特异性癌症免疫疗法的有效性。这一发现为癌症治疗提供了新途径。

领导这项研究的斯坦福大学化学教授卡罗琳·贝尔托西认为,这是一种全新维度的癌症免疫疗法,可能也是首个涉及癌细胞表面多糖包被的疗法。

多糖包被又称细胞被,是由碳水化合物形成的覆盖在细胞质膜表面的保护层,其主要成分是糖。科学家此前已知,如果癌细胞表面存在某些糖,免疫疗法不大可能取得好效果。一些研究多糖包被的实验室发现,癌细胞表面一种名为唾液酸的单糖是表明先天免疫系统对可疑肿瘤“视而不见”的信号。

贝尔托西领导的研究小组通过实验证明,去除癌细胞表面唾液酸,可以增加先天免疫系统辨认和攻击癌细胞的可能性。

研究人员选取表面表达不同数量人表皮生长因子受体-2(HER2)蛋白的乳腺癌细胞进行研究。大多数乳腺癌细胞会表达一定数量的HER2蛋白,HER2过度表达的患者通常可接受靶向药物赫赛汀的治疗。

赫赛汀是一种抗体,可与HER2结合,激活自然杀伤细胞、巨噬细胞等免疫细胞杀死肿瘤。但是赫赛汀也可能疗效不佳,尤其是在HER2蛋白表达不够、癌细胞表面存在唾液酸的情况下。

研究人员使赫赛汀抗体携带一种被称为“化学割草机”的化学工具,一旦赫赛汀与癌细胞表面HER2蛋白结合时,“化学割草机”就会去除邻近的唾液酸。他们发现,这会导致赫赛汀激活免疫细胞杀死癌细胞的可能性大为提高,尤其是在癌细胞表面HER2蛋白表达较少而糖表达较高的情况下。

贝尔托西说,上述研究只是以乳腺癌为例,但去除唾液酸的化学工具也可以用于多种细胞和不同糖类。

这项成果发表在新一期美国《国家科学院学报》上。   

原始出处

Han Xiaoa,b,1, Elliot C. Woodsa,b,1, Petar Vukojicica,b, and Carolyn R. Bertozzia,b,2.Author Affiliations.Precision glycocalyx editing as a strategy for cancer immunotherapy.PNAS.2016     

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    2016-08-28 drwjr
  3. 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topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eocJY6moGTnYzC8V8lUl3k679Uxh0PVMjIamhoDYuSYr6D4KDKlbpuNuCKFlJaiaVrmFIrbseIWqUA/132, createdBy=ad571630249, createdName=马里奥8433, createdTime=Mon Aug 29 09:57:00 CST 2016, time=2016-08-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1252128, encodeId=07b712521285d, content=<a href='/topic/show?id=3efee1519b2' target=_blank style='color:#2F92EE;'>#癌细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71519, encryptionId=3efee1519b2, topicName=癌细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4cea26, createdName=yxch36, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554473, encodeId=5d6a15544e311, content=<a href='/topic/show?id=74e458559f5' target=_blank style='color:#2F92EE;'>#新疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58559, encryptionId=74e458559f5, topicName=新疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d03114536414, createdName=kcb074, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105439, encodeId=23e810543968, content=这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Aug 27 10:33:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105077, encodeId=6ec61050e7b0, content=学习起来, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151005/IMG5612955936CFA7964.jpg, createdBy=18621654109, createdName=Guoxj3234, createdTime=Fri Aug 26 21:27:00 CST 2016, time=2016-08-26, status=1, ipAttribution=)]
    2016-08-30 李东泽

    很好,不错,以后会多学习

    0

  5. 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target=_blank style='color:#2F92EE;'>#新疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58559, encryptionId=74e458559f5, topicName=新疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d03114536414, createdName=kcb074, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105439, encodeId=23e810543968, content=这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Aug 27 10:33:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105077, encodeId=6ec61050e7b0, content=学习起来, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151005/IMG5612955936CFA7964.jpg, createdBy=18621654109, createdName=Guoxj3234, createdTime=Fri Aug 26 21:27:00 CST 2016, time=2016-08-26, status=1, ipAttribution=)]
    2016-08-29 靠近你

    好文章,继续学习,谢谢分享

    0

  6. 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target=_blank style='color:#2F92EE;'>#新疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58559, encryptionId=74e458559f5, topicName=新疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d03114536414, createdName=kcb074, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105439, encodeId=23e810543968, content=这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Aug 27 10:33:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105077, encodeId=6ec61050e7b0, content=学习起来, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151005/IMG5612955936CFA7964.jpg, createdBy=18621654109, createdName=Guoxj3234, createdTime=Fri Aug 26 21:27:00 CST 2016, time=2016-08-26, status=1, ipAttribution=)]
    2016-08-29 马里奥8433

    新的思路 令人激动 感谢小编

    0

  7. 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topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eocJY6moGTnYzC8V8lUl3k679Uxh0PVMjIamhoDYuSYr6D4KDKlbpuNuCKFlJaiaVrmFIrbseIWqUA/132, createdBy=ad571630249, createdName=马里奥8433, createdTime=Mon Aug 29 09:57:00 CST 2016, time=2016-08-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1252128, encodeId=07b712521285d, content=<a href='/topic/show?id=3efee1519b2' target=_blank style='color:#2F92EE;'>#癌细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71519, encryptionId=3efee1519b2, topicName=癌细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4cea26, createdName=yxch36, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554473, encodeId=5d6a15544e311, content=<a href='/topic/show?id=74e458559f5' target=_blank style='color:#2F92EE;'>#新疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58559, encryptionId=74e458559f5, topicName=新疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d03114536414, createdName=kcb074, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105439, encodeId=23e810543968, content=这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Aug 27 10:33:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105077, encodeId=6ec61050e7b0, content=学习起来, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151005/IMG5612955936CFA7964.jpg, createdBy=18621654109, createdName=Guoxj3234, createdTime=Fri Aug 26 21:27:00 CST 2016, time=2016-08-26, status=1, ipAttribution=)]
    2016-08-28 yxch36
  8. 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topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eocJY6moGTnYzC8V8lUl3k679Uxh0PVMjIamhoDYuSYr6D4KDKlbpuNuCKFlJaiaVrmFIrbseIWqUA/132, createdBy=ad571630249, createdName=马里奥8433, createdTime=Mon Aug 29 09:57:00 CST 2016, time=2016-08-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1252128, encodeId=07b712521285d, content=<a href='/topic/show?id=3efee1519b2' target=_blank style='color:#2F92EE;'>#癌细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71519, encryptionId=3efee1519b2, topicName=癌细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4cea26, createdName=yxch36, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1554473, encodeId=5d6a15544e311, content=<a href='/topic/show?id=74e458559f5' target=_blank style='color:#2F92EE;'>#新疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58559, encryptionId=74e458559f5, topicName=新疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d03114536414, createdName=kcb074, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105439, encodeId=23e810543968, content=这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Aug 27 10:33:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), 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    2016-08-28 kcb074
  9. 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target=_blank style='color:#2F92EE;'>#新疗法#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58559, encryptionId=74e458559f5, topicName=新疗法)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d03114536414, createdName=kcb074, createdTime=Sun Aug 28 02:09:00 CST 2016, time=2016-08-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105439, encodeId=23e810543968, content=这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160601/IMG574E13FEE55F33222.jpg, createdBy=929c1478678, createdName=zibozhouping, createdTime=Sat Aug 27 10:33:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105077, encodeId=6ec61050e7b0, content=学习起来, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20151005/IMG5612955936CFA7964.jpg, createdBy=18621654109, createdName=Guoxj3234, createdTime=Fri Aug 26 21:27:00 CST 2016, time=2016-08-26, status=1, ipAttribution=)]
    2016-08-27 zibozhouping

    这篇资讯写的真好,带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。

    0

  10. 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