Immunity:口腔细菌保护肿瘤细胞免受免疫攻击

2015-02-17 佚名 生物谷

结肠癌患者拥有异常多的口腔常见细菌,但这些细菌在肿瘤发展中的潜在作用尚未明确。由Cell Press在Immunity杂志上发表的一项最新研究表明,口腔致病菌——具核梭杆菌能保护多种肿瘤细胞免于被免疫细胞杀死。这一发现可能为癌症患者的治疗开辟新的途径。 某些细菌先前已被证明对抗癌症,所以本文发现令人惊讶。自然杀伤细胞(NK cells)能保卫身体对抗各种健康威胁,包括病毒和寄生虫。这些细胞还

结肠癌患者拥有异常多的口腔常见细菌,但这些细菌在肿瘤发展中的潜在作用尚未明确。由Cell Press在Immunity杂志上发表的一项最新研究表明,口腔致病菌——具核梭杆菌能保护多种肿瘤细胞免于被免疫细胞杀死。这一发现可能为癌症患者的治疗开辟新的途径。

某些细菌先前已被证明对抗癌症,所以本文发现令人惊讶。自然杀伤细胞(NK cells)能保卫身体对抗各种健康威胁,包括病毒和寄生虫。这些细胞还可以杀死肿瘤,但肿瘤细胞已经进化到可以回避这个免疫应答。在1890年代初,一个叫威廉·科莱医生曾表示,某些细菌可以增强抗肿瘤免疫的,他甚至用细菌提取物成功治疗癌症患者。但是细菌和肿瘤之间的关系是复杂的,而且直到目前,不知道是否有其他类型的细菌是在常见的癌症中产生相反的效果:保护显影肿瘤从免疫细胞攻击。

为了解决这个问题,Mandelboim研究人员联手希伯来大学哈达萨学院共同研究自然杀伤细胞的抗肿瘤活性是否受到核梭杆菌的影响,核梭杆菌是一种口腔致病菌,与牙周疾病相关而且也被发现存在于人结肠肿瘤。

 

他们发现,这种细菌可保护各种人类的肿瘤细胞的破坏。这种免疫逃避取决于细菌蛋白—Fap2与TIGIT的免疫细胞受体的结合。“如果去除肿瘤中核梭杆菌或使用抗体抑制TIGIT,我们可以让免疫细胞更有效地杀死结肠肿瘤细胞。”希伯来大学哈达萨医学院的Chamutal博士说道。

研究者现在打算测试是否核梭杆菌也存在其他类型的肿瘤。他们还计划研究Fap2-TIGIT相互作用的更多的细节并开发方法阻止这些相互作用。Mandelboim教授说道:“由于具核梭杆菌特异性靶向肿瘤,可能会在将来设计一个Fap2缺失的具核梭杆菌,以指导杀肿瘤治疗剂更好的靶向肿瘤。”

原始出处

Gur C1, Ibrahim Y2, Isaacson B3, Yamin R3, Abed J2, Gamliel M3, Enk J3, Bar-On Y3, Stanietsky-Kaynan N3, Coppenhagen-Glazer S2, Shussman N4, Almogy G4, Cuapio A5, Hofer E5, Mevorach D6, Tabib A6, Ortenberg R7, Markel G7, Miklić K8, Jonjic S8, Brennan CA9, Garrett WS10, Bachrach G11, Mandelboim O12.Binding of the Fap2 Protein of Fusobacterium nucleatum to Human Inhibitory Receptor TIGIT Protects Tumors from Immune Cell Attack.Immunity. 2015 Feb 6.

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  2. [GetPortalCommentsPageByObjectIdResponse(id=2030291, encodeId=f19e203029160, content=<a href='/topic/show?id=25079e7287' target=_blank style='color:#2F92EE;'>#Immunity#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9772, encryptionId=25079e7287, topicName=Immunity)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/C4Qhy5XHSe503Qbjzc1UtDR83BCv66o6P2XRedX9ohsNGa3uEVicFFk2qkuX5zBSmpicepFySBrwoYknhqMdKmtw/132, createdBy=1aca2500179, createdName=12498d2fm51(暂无昵称), createdTime=Mon Mar 30 06:11:00 CST 2015, time=2015-03-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16651, encodeId=9a6116651d1, content=非常好的文章,学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f2fb1607679, createdName=orthoW, createdTime=Sat Feb 21 10:44:00 CST 2015, time=2015-02-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16572, encodeId=53ed165e2d8, content=很不错学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f2fb1607679, createdName=orthoW, createdTime=Fri Feb 20 09:14:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16559, encodeId=b1e916559bc, content=?学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=171, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f2fb1607679, createdName=orthoW, createdTime=Thu Feb 19 23:30:00 CST 2015, time=2015-02-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312906, encodeId=b94d131290699, content=<a href='/topic/show?id=4ce783062c7' target=_blank style='color:#2F92EE;'>#肿瘤细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83062, encryptionId=4ce783062c7, topicName=肿瘤细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c859411, createdName=hmwwww, createdTime=Thu Feb 19 00:11:00 CST 2015, time=2015-02-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1392813, encodeId=57c3139281384, content=<a href='/topic/show?id=73d53833178' target=_blank style='color:#2F92EE;'>#口腔细菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=38331, encryptionId=73d53833178, topicName=口腔细菌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5cb32500112, createdName=1508842480_96220437, createdTime=Thu Feb 19 00:11:00 CST 2015, time=2015-02-19, status=1, ipAttribution=)]
    2015-02-21 orthoW

    非常好的文章,学习

    0

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    2015-02-20 orthoW

    很不错学习了

    0

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    2015-02-19 orthoW

    ?学习了

    0

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