Cell:北京大学全新Cell!首次在单细胞水平描绘肝癌微环境中的免疫图谱

2017-06-17 佚名 生物探索

2017年6月16日,北京大学生命科学学院BIOPIC中心、北京未来基因诊断高精尖创新中心、北大-清华生命科学联合中心张泽民研究组,首都医科大学附属北京世纪坛医院暨北京大学第九临床医学院肝胆胰外科彭吉润研究组,以及美国AMGEN公司的欧阳文军研究组在Cell杂志发表了题为“Landscape of infiltrating T cells in liver cancer revealed by s

2017年6月16日,北京大学生命科学学院BIOPIC中心、北京未来基因诊断高精尖创新中心、北大-清华生命科学联合中心张泽民研究组,首都医科大学附属北京世纪坛医院暨北京大学第九临床医学院肝胆胰外科彭吉润研究组,以及美国AMGEN公司的欧阳文军研究组在Cell杂志发表了题为“Landscape of infiltrating T cells in liver cancer revealed by single-cell sequencing”的研究论文,首次在单细胞水平上描绘了肝癌微环境中的免疫图谱。

癌症免疫疗法是近年新兴的极具潜力的治疗方法,尤其是免疫检查点抑制剂疗法,如CTLA-4抗体Ipilimumab及PD-1抗体pembrolizumab目前都取得了良好的疗效。虽然这种治疗方法可以达到显着的临床效果,但是在不同病人或者不同癌种之间的效果却很不均一。DNA变异的数目、肿瘤浸润淋巴细胞的水平,以及药物靶点的表达等因素都会影响到各类肿瘤免疫治疗的效果。由于参与肿瘤发生发展的免疫细胞类型多样且异质性很强,只有开展单细胞水平的研究才能真正获得系统详尽的肿瘤免疫图谱,从而助力肿瘤免疫疗法的发展及有效靶点和生物标志物的发现。

中国肝癌发病率居世界之首,且术后存活率较低。之前的研究表明肝癌组织内富含大量肿瘤浸润淋巴细胞,但是相比于免疫疗法在黑色素瘤及肺癌等肿瘤上的成果,目前成功针对肝癌的免疫治疗方法却鲜有报道。通过深刻了解肝癌的肿瘤免疫微环境来探索新的肿瘤免疫疗法及寻找新靶点和有效的生物标志物对肝癌的诊断和治疗具有重大意义。

张泽民研究组与彭吉润研究组及欧阳文军研究组深入合作,在单细胞水平对肝癌肿瘤微环境中T淋巴细胞的转录组及T细胞受体(TCR)序列进行了综合分析,完成了超过5000个T细胞的单细胞测序数据。基于生物信息学分析,通过对T细胞进行亚群分类、发展轨迹分析及比较不同亚群中T细胞克隆的分布,该研究探索了不同亚群之间的关系,鉴定每个亚群特异的基因表达,揭示了肿瘤中的T细胞在功能、分布和发展状态方面和其他部位的T细胞截然不同。肿瘤在免疫系统中出现逃逸的主要原因包括杀伤性CD8 T细胞的功能紊乱及抑制性T细胞的大量存在,针对这两类细胞寻找靶点是免疫疗法的主要方向。

该研究着重探索了肿瘤中这两类细胞的特异表达基因,发现基因Layilin在这两群细胞中均特异性表达,并通过体外实验证明该基因对于CD8 T细胞的杀伤功能有抑制调节作用,可能作为一个免疫疗法的新靶点。同时,基于TCR数据分析,该研究发现肝癌内存在大量肿瘤组织特异的克隆增生的T细胞,但是这些细胞大多处于耗竭状态,从而揭示了肿瘤细胞逃逸免疫监视的原因。此外,该研究还描绘了初始T细胞向耗竭状态的发展轨迹,并在耗竭性CD8 T细胞亚群中发现了一类FOXP3+抑制性T细胞的存在,提出了耗竭T细胞会进一步发展成抑制性T细胞的潜在发展方向。

该项工作是国际上首次大规模针对肿瘤相关T细胞的单细胞组学研究,提供了极有价值的数据资源,为多角度理解肝癌相关的T细胞特征奠定了基础。该项工作的数据积累、科学发现和理论推演有望促进已有的免疫治疗方案在肝癌中的临床应用,并有助于发现有效的针对肝癌治疗免疫治疗靶点,进而加速创立新的肝癌免疫疗法。同时,该项工作也为肿瘤免疫的图谱勾画作出了范式,为今后对其他肿瘤开展类似的研究及各类肿瘤免疫的发展提供了基础。

北京大学生命科学学院BIOPIC中心博士后郑春红,博士研究生张园园、郭心怡,前沿交叉研究院博士研究生郑良涛,北京大学医学部博士研究生郭化虎和美国AMGEN公司博士后Jae-Kwang Yoo为该论文的并列第一作者。北京大学生命科学学院BIOPIC中心、北京未来基因诊断高精尖创新中心、北大-清华生命科学联合中心张泽民,首都医科大学附属北京世纪坛医院暨北京大学第九临床医学院肝胆胰外科彭吉润,以及美国AMGEN公司的欧阳文军为该论文的共同通讯作者。该项研究得到了北京未来基因诊断高精尖创新中心、国家重点研发计划、国家自然科学基金以及北大-清华生命科学联合中心的资助。

原始出处:

chunhong zheng,liangtao zheng,et al.Landscape of Infiltrating T Cells in liver Cancer Revealed by Single-Cell Sequencing.Cell.15 June 2017,Volume 169,issue 7:1342-1356.DOI:http://dx.doi.org/10.1016/j.cell.2017.05.035

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    2017-07-30 维他命
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    2017-06-18 ylzr123

    认真学习,不断进步,把经验分享给同好。点赞了!

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1870013, encodeId=b5c118e00134c, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Thu Jun 29 03:26:00 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960272, encodeId=8e4a19602e2e4, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Sun Jul 30 13:26:00 CST 2017, time=2017-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1776350, encodeId=617a1e763501d, content=<a href='/topic/show?id=7d9d33646c8' target=_blank style='color:#2F92EE;'>#北京大学#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33646, encryptionId=7d9d33646c8, topicName=北京大学)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6cc38925383, createdName=lixiaol, createdTime=Sat Apr 14 21:26:00 CST 2018, time=2018-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212255, encodeId=ae10212255f4, content=认真学习,不断进步,把经验分享给同好。点赞了!, 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/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Sun Jun 18 10:53:03 CST 2017, time=2017-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212168, encodeId=824e212168f6, content=好文章需要好的积淀, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/PiajxSqBRaEJT6l93IMYI4yHbuQ6SeZ7HEkJw5o50qBMUibIGVDNqNvTr8ic1wUfHWIIiardvrMQOQRl3pbocQ7G4Q/0, createdBy=434d1527336, createdName=honghongwuwu, createdTime=Sun Jun 18 07:50:29 CST 2017, time=2017-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212086, encodeId=5449212086ce, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Sun Jun 18 01:21:37 CST 2017, time=2017-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212049, encodeId=7548212049b4, content=优秀!, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5K4PNicOvbHfgIficrsEKztlD5yv1UnCFhnFmFU9yv1RHLflMRibWrppbsiccfMB8tT9HCkAr3zL2zVml/0, createdBy=89da1604922, createdName=䖝二, createdTime=Sat Jun 17 23:12:23 CST 2017, time=2017-06-17, status=1, ipAttribution=)]
    2017-06-18 honghongwuwu

    好文章需要好的积淀

    0

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    2017-06-18 luominglian113

    学习了,谢谢分享

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1870013, encodeId=b5c118e00134c, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Thu Jun 29 03:26:00 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960272, encodeId=8e4a19602e2e4, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Sun Jul 30 13:26:00 CST 2017, time=2017-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1776350, encodeId=617a1e763501d, content=<a href='/topic/show?id=7d9d33646c8' target=_blank style='color:#2F92EE;'>#北京大学#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33646, encryptionId=7d9d33646c8, topicName=北京大学)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6cc38925383, createdName=lixiaol, createdTime=Sat Apr 14 21:26:00 CST 2018, time=2018-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212255, encodeId=ae10212255f4, content=认真学习,不断进步,把经验分享给同好。点赞了!, 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/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Sun Jun 18 10:53:03 CST 2017, time=2017-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212168, encodeId=824e212168f6, content=好文章需要好的积淀, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/PiajxSqBRaEJT6l93IMYI4yHbuQ6SeZ7HEkJw5o50qBMUibIGVDNqNvTr8ic1wUfHWIIiardvrMQOQRl3pbocQ7G4Q/0, createdBy=434d1527336, createdName=honghongwuwu, createdTime=Sun Jun 18 07:50:29 CST 2017, time=2017-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212086, encodeId=5449212086ce, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=550d2008262, createdName=luominglian113, createdTime=Sun Jun 18 01:21:37 CST 2017, time=2017-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=212049, encodeId=7548212049b4, content=优秀!, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5K4PNicOvbHfgIficrsEKztlD5yv1UnCFhnFmFU9yv1RHLflMRibWrppbsiccfMB8tT9HCkAr3zL2zVml/0, createdBy=89da1604922, createdName=䖝二, createdTime=Sat Jun 17 23:12:23 CST 2017, time=2017-06-17, status=1, ipAttribution=)]
    2017-06-17 䖝二

    优秀!

    0

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“我们治疗癌症,不仅应该学习国内外的先进经验,也应该懂得质疑。我们在自然科学方面落后于西方,在很多方面仍然是 洋为中用 。但中华民族不能长期安于 老二 地位。为此,洋为中用,能否超越,如何超越,就成为我们必须思考的问题。”本月2日至3日,中国工程院院士汤钊猷在暨南大学附属复大医院出席第三届两岸四地癌症康复论坛时如此表示。汤钊猷院士表示,对西方医学,既要学习,又要质疑,洋为中用,才可能赶超世界水平。

Clin Gastroenterol H:雌激素替代疗法降低女性肝癌患者的风险和增加生存时间!

在HCC与女性对照者的单中心病例对照研究中,研究人员发现使用雌激素与HCC风险降低以及增加HCC患者整体生存期相关。需要进一步的研究来确定雌激素治疗对妇女和HCC患者的好处,以及对肿瘤雌激素受体表达的影响。

CA-Cancer J Clin:肝癌的死亡率在不断增长!

据美国癌症学会最新统计消息披露,现今在美国,肝癌的死亡率是二十世纪八十年代的两倍,并且增长速度比其他任何一个癌症都快。

BMJ Open:咖啡喝起来,肝癌不易来

根据南安普敦大学的一项研究显示,多喝咖啡可以降低罹患最常见的原发性肝癌的风险。

Oncotarget:重磅!科学家鉴别出肝癌的天然抑制蛋白

日前,一项刊登在国际杂志Oncotarget上的研究报告中,来自奥古斯塔大学的研究人员通过研究发现,一种能够帮助细胞进行有序组织并且完成任务的关键蛋白或许是预防肝癌的一种肿瘤抑制子。这种名为Scrib的蛋白质会根据癌症类型作为肿瘤抑制蛋白和癌基因而出现,在肝癌中该蛋白往往会从细胞的保护外层迁移进入细胞内部发挥作用,一旦进入细胞内部,该