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Nat Cell Biol:奥地利研究发现EGFR致癌新机制

2014-09-11 伊文 生物谷

人类机体表皮生长因子受体(EGFR)蛋白可以控制细胞的生长,在许多癌症中都存在该蛋白的突变体,因此被当作靶向治疗的一个攻击点。近日,奥地利维也纳医科大学综合癌症中心和维也纳总医院一研究小组发现,EGFR蛋白质的危险性并不取决于肿瘤细胞,而取决于其在肿瘤邻近细胞中的活性;在肝脏肿瘤形成期间,EGFR在刺激肝脏中巨噬细胞形成肿瘤中扮演着重要的角色,相关研究成果刊登于国际杂志Nature 

人类机体表皮生长因子受体EGFR)蛋白可以控制细胞的生长,在许多癌症中都存在该蛋白的突变体,因此被当作靶向治疗的一个攻击点。近日,奥地利维也纳医科大学综合癌症中心和维也纳总医院一研究小组发现,EGFR蛋白质的危险性并不取决于肿瘤细胞,而取决于其在肿瘤邻近细胞中的活性;在肝脏肿瘤形成期间,EGFR在刺激肝脏中巨噬细胞形成肿瘤中扮演着重要的角色,相关研究成果刊登于国际杂志Nature Cell Biology上。

EGFR可以作为一种跨膜受体控制细胞的多种生化过程;在人类机体中EGFR存在于多种类型细胞中,而且其在许多种癌症的发生中也扮演着重要的角色,基于此,研究者们常常以EGFR为靶点来设计新型的抗癌疗法。

肝细胞癌是世界范围内发生最为频繁的恶性肿瘤,肝细胞癌在所有的男女性癌症患者中占到了将近6%和3%,截至目前,EGFR的促肿瘤角色和其在肿瘤细胞中的表达直接相关,然而本文研究中,研究者却发现,EGFR在肝脏巨噬细胞形成肝细胞癌的过程中发挥着决定性的作用。

维也纳医科大学癌症研究所所长、综合癌症中心副主任Maria Sibilia教授表示,我们发现EGFR的抑制或许对于巨噬细胞具有肿瘤抑制效应,但并不是针对肿瘤细胞自身;如果EGFR可逆地存在于大量巨噬细胞表面,其或许就会促进肿瘤的发生。

本文研究或许可以帮助解释为何用于癌症疗法的EGFR抑制剂对于治疗患者的效果并不理想,本研究也首次揭示了在非肿瘤细胞中EGFR的促肿瘤发生的机制,这对于利用巨噬细胞来开发治疗癌症的靶向性疗法将会带来革命性的巨变。

原始出处

Lanaya H1, Natarajan A1, Komposch K1, Li L2, Amberg N3, Chen L2, Wculek SK3, Hammer M3, Zenz R3, Peck-Radosavljevic M4, Sieghart W4, Trauner M4, Wang H2, Sibilia M3.EGFR has a tumour-promoting role in liver macrophages during hepatocellular carcinoma formation.Nat Cell Biol. 2014 Aug 31

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    2014-09-28 维他命
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    2014-11-07 liye789132251
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    2015-07-07 sunylz
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  6. [GetPortalCommentsPageByObjectIdResponse(id=1959142, encodeId=5d321959142cc, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, 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 Sep 28 02:09:00 CST 2014, time=2014-09-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1880277, encodeId=f8c718802e729, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Nov 07 12:09:00 CST 2014, time=2014-11-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868897, encodeId=31ad186889e89, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, 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 Sep 30 14:09:00 CST 2014, time=2014-09-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917070, encodeId=3750191e07031, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Tue Jul 07 16:09:00 CST 2015, time=2015-07-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1766894, encodeId=08f51e668943b, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Thu Apr 02 11:09:00 CST 2015, time=2015-04-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1753082, encodeId=07c21e5308240, content=<a href='/topic/show?id=6a57e33772b' target=_blank style='color:#2F92EE;'>#研究发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73377, encryptionId=6a57e33772b, topicName=研究发现)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=7e1736602208, createdName=hanhaisha2020, createdTime=Thu Oct 23 12:09:00 CST 2014, time=2014-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1370807, encodeId=b35213e080730, content=<a href='/topic/show?id=9c39864991e' target=_blank style='color:#2F92EE;'>#致癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86499, encryptionId=9c39864991e, topicName=致癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2c25323, createdName=jambiya, createdTime=Sat Sep 13 00:09:00 CST 2014, time=2014-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1534258, encodeId=0d91153425890, content=<a href='/topic/show?id=22b3e9887e' target=_blank style='color:#2F92EE;'>#GFR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7988, encryptionId=22b3e9887e, topicName=GFR)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0a812532020, createdName=liuyiping, createdTime=Sat Sep 13 00:09:00 CST 2014, time=2014-09-13, status=1, ipAttribution=)]
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    2014-09-13 jambiya
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    2014-09-13 liuyiping

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CSMO 2014:EGFR抑制剂的新进展与新思路

在7月4日的第八届中国肿瘤内科大会上,同济大学附属上海市肺科医院肿瘤科的周彩存教授介绍了非小细胞肺癌表皮生长因子受体(EGFR)抑制剂:新进展与新思路。 肺癌,作为死亡率居世界首位的癌症,而其中大部分为非小细胞肺癌(Non-small cell lung cancer,NSCLC)。在过去的几十年中, 人们为改善晚期非小细胞治疗做出了许多努力并且在特定人群中,靶向治疗起着越来越重要的作用

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由于大部分可切除的非小细胞肺癌(NSCLC)患者确诊后不久即接受手术治疗,肺部肿块的自然病史并未得到充分研究。某些偶然发现的非小细胞肺癌患者通常无症状,且病灶过小而无明显的恶性征象,有时患者拒绝接受外科治疗或不治疗随访。迄今为止,没有研究调查非小细胞肺癌 VDT 和 EGFR 突变之间的关系。鉴于此来自日本的 Ryota Nakamura 博士等人进行了一项回顾性研究。文章发表在近期的 JTO 杂

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JCI:科学家揭示肺癌内在耐药性发生的分子机制

40%的肺癌患者都不会对阻断肿瘤生长的靶向性疗法产生反应,这也是临床医生们长期以来比较疑惑的一个问题,近日,来自乔治敦大学癌症中心等处的研究人员通过研究揭示了肺癌内在性耐药发生的原因,并且为开发新型药物来逆转这种肺癌耐药性提供了一定的思路,相关研究成果刊登于国际杂志the Journal of Clinical Investigation上。【原文下载】 这项研究中,研究者发现生

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