Cell:胰腺癌的潜在治疗靶标Lin28b被发现

2016-05-15 MedSci MedSci原创

-在一项新的研究中,来自美国麻省总医院(MGH)等机构的研究人员鉴定出一种最为常见的被称作胰腺导管腺癌(pancreatic ductal adenocarcinoma, PDAC)的胰腺癌类型的首个潜在的分子治疗靶标。除了发现在大约30%的PDAC病例中肿瘤抑制蛋白SIRT6失活之外,研究人员还鉴定出SIRT6抑制PDAC发展的精确分子机制,这一机制不同于它抑制结直肠癌的方式。相关研究结果于

Figure thumbnail fx1

-在一项新的研究中,来自美国麻省总医院(MGH)等机构的研究人员鉴定出一种最为常见的被称作胰腺导管腺癌(pancreatic ductal adenocarcinoma, PDAC)的胰腺癌类型的首个潜在的分子治疗靶标。除了发现在大约30%的PDAC病例中肿瘤抑制蛋白SIRT6失活之外,研究人员还鉴定出SIRT6抑制PDAC发展的精确分子机制,这一机制不同于它抑制结直肠癌的方式。相关研究结果于2016年5月12日在线发表在Cell期刊上,论文标题为“SIRT6 Suppresses Pancreatic Cancer through Control of Lin28b”。

论文通信作者、MGH癌症中心科学家Raul Mostoslavsky博士说,“随着癌症基因组学取得的进展,表观遗传因子---控制其他基因是否和何时表达的那些基因-发生的变化很明显代表着癌症内最为频繁发生的变化中的一些。然而,在此之前,人们很少描述过这些因子,而且已被鉴定出的那些因子也未与特异性的下游靶标相关联。在分析的PDAC病人样品中,30%以上的样品表现出我们鉴定出的分子特征,而且这些病人也经证实具有很差的预后。”

已知SIRT6控制细胞加工葡萄糖的方式,而且Mostoslavsky团队在2012年的一项研究中已发现它抑制结直肠癌的能力涉及控制一种被称作醣酵解的过程。尽管那项研究也发现SIRT6在PDAC肿瘤细胞中下降表达,但是当前的这项新研究表明SIRT6缺乏通过一种不同的机制促进PDAC发展。针对细胞系和模式动物的实验揭示出PDAC中的低水平SIRT6与Lin28b增加表达相关联,其中Lin28b是一种在胎儿发育期间正常表达的癌蛋白。

Lin28b表达经证实是SIRT6缺乏的PDAC肿瘤细胞生长和存活所必不可少的,而且它的作用机制阻止被称作let-7的肿瘤抑制mRNA家族阻断三种基因HMGA2、IGF2BP1和IGF2BP3的表达,其中之前已知这三种基因与胰腺癌增加的侵袭性和转移相关联。所有的这些特征---下降表达的SIRT6、增加表达的Lin28b和下降表达的let-7---在更早死亡的病人PDAC肿瘤样品中发现到。

在未来,研究人员希望开发Lin28b抑制剂可能让这一部分PDAC病人受益,因为当前这些病人只有非常少的治疗选择。

原始出处:

Sita Kugel, Carlos Sebastián, Julien Fitamant, Kenneth N. Ross, Supriya K. Saha, Esha Jain, Adrianne Gladden, Kshitij S. Arora, Yasutaka Kato, Miguel N. Rivera, Sridhar Ramaswamy, Ruslan I. Sadreyev, Alon Goren, Vikram Deshpande, Nabeel Bardeesy, Raul Mostoslavsky. SIRT6 Suppresses Pancreatic Cancer through Control of Lin28b. doi:10.1016/j.cell.2016.04.033

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    2016-10-19 lg.zhao
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    2016-07-19 维他命
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    2016-09-30 1e10c84am36(暂无匿称)

    拜读,好文

    0

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  6. [GetPortalCommentsPageByObjectIdResponse(id=2050120, encodeId=4b59205012011, content=<a href='/topic/show?id=a5af10893c9' target=_blank style='color:#2F92EE;'>#LIN28#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10893, encryptionId=a5af10893c9, topicName=LIN28)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c737344, createdName=lg.zhao, createdTime=Wed Oct 19 01:20:00 CST 2016, time=2016-10-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1869366, encodeId=24b6186936614, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Tue Jan 10 19:20:00 CST 2017, time=2017-01-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1959623, encodeId=16e9195962389, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, 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=Tue Jul 19 03:20:00 CST 2016, time=2016-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=138184, encodeId=218d13818456, content=拜读,好文, 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/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Fri Sep 30 15:26:04 CST 2016, time=2016-09-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1909428, encodeId=3a5219094287c, content=<a href='/topic/show?id=be1864e205a' target=_blank style='color:#2F92EE;'>#治疗靶标#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64720, encryptionId=be1864e205a, topicName=治疗靶标)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a885259, createdName=yourmama, createdTime=Fri Feb 03 09:20:00 CST 2017, time=2017-02-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1352743, encodeId=65a31352e43b7, content=<a href='/topic/show?id=827d9996311' target=_blank style='color:#2F92EE;'>#靶标#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=99963, encryptionId=827d9996311, topicName=靶标)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Tue May 17 05:20:00 CST 2016, time=2016-05-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=85974, encodeId=5a5c859e43f, content=很前沿的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=113, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4bfa83595, createdName=jetleo, createdTime=Mon May 16 12:07:00 CST 2016, time=2016-05-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=85913, encodeId=382185913a3, content=发现不断, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c4a5105539, createdName=lovetcm, createdTime=Sun May 15 20:12:00 CST 2016, time=2016-05-15, status=1, ipAttribution=)]
    2016-05-17 zhaojie88
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    2016-05-16 jetleo

    很前沿的进展

    0

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    2016-05-15 lovetcm

    发现不断

    0

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