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JCO:TP53胚系突变与儿童急性淋巴细胞白血病的易感性和预后的关系

2018-01-13 佚名 肿瘤资讯

急性淋巴细胞白血病(ALL)是儿童常见的恶性肿瘤,越来越多的证据显示其与遗传易感性相关。TP53是重要的抑癌基因,在多种肿瘤中检测到TP53的突变。近日,《JCO》发表的一项研究在大样本量的儿童ALL患者检测TP53的胚系突变,并探索致病性突变与患者治疗疗效和预后的关系。

急性淋巴细胞白血病(ALL)是儿童常见的恶性肿瘤,越来越多的证据显示其与遗传易感性相关。TP53是重要的抑癌基因,在多种肿瘤中检测到TP53的突变。近日,《JCO》发表的一项研究在大样本量的儿童ALL患者检测TP53的胚系突变,并探索致病性突变与患者治疗疗效和预后的关系。

背景

转录因子p53由TP53基因编译,在调节细胞周期,DNA修复和凋亡上扮演着重要角色。抑癌基因TP53突变与大量成人和儿童肿瘤的发病有相关性。因TP53的胚系突变导致的p53失活,可以导致一类罕见的家族癌症易感综合症,称为李-佛美尼症候群(Li-Fraumeni syndrome, LFS)。这类人群患癌的机会比一般人高很多,约一半的人在30岁之前会患癌,75%的男性在一生中会罹患癌症,而女性100%会患癌。LFS人群常见的恶性肿瘤包括乳腺癌,肉瘤,颅内肿瘤,而白血病相对罕见。然而,近期的研究报道显示,TP53胚系突变与亚二倍体型急性淋巴细胞性白血病的发病相关。

急性淋巴细胞白血病(ALL)是儿童常见的恶性肿瘤,越来越多的证据显示其与遗传易感性相关。例如,与淋巴形成和肿瘤抑癌基因相关的基因多态性,如ARID5B,IKZF1,CEBPE,GATA3,CDKN2A,BMI-PIP4K2A和TP63,与ALL发病相关。此外,研究还报道ETV6,PAX5和SH2B3与家族性ALL相关。在ALL患者中,TP53变异发生率较低,多见于亚二倍体型急性淋巴细胞性白血病,其中50%的变异为胚系突变。上述研究结果提示,这一亚型的ALL可能是LFS的一种表现,但LFS是否与其他ALL的易感性相关呢?目前尚未明确。

目前,儿童ALL的治愈率较高,但仍有20%的患者会复发死亡。即使是那些肿瘤长期缓解的患者,也面临着很多短期和长期毒性,包括罹患治疗相关的第二原发癌。TP53在肿瘤抑制和药物反应上扮演着重要角色,我们假设可以引发p53蛋白功能改变的TP53变异与儿童ALL的易感性有关,同时也会影响治疗的疗效。本研究在大样本量的儿童ALL患者中,通过检测TP53胚系变异,来明确与ALL发病相关的基因变体,并探寻这些基因变体对患者治疗疗效的影响。

方法和结果

为全面了解TP53基因变异特征,研究者对两个临床试验AALL0232和P9900中3801例儿童B-ALL患者进行TP53胚系突变测序。检测到一个常见的变异体,pP72R(rs1042522),碱基变异频率为66.2%,在后续分析中,排除了这一个常见的基因多态性。另外发现了49个TP53外显子区的非沉默突变,发生率都较低(碱基变异频率<0.5%):40个错义突变,1个非错义突变,6个框移突变和2个框内缺失,见下图1A。


图1A. 3801例患者中检测到的TP53外显子区的非沉默突变

为探寻每一个TP53变体的意义,研究者根据数据库中各个突变变体的转录活性进行分类:致病性的变体或意义不明的变体(variant of unknown significance, VUS),并在非ALL人群中检测每个变体的发生率。在40个错义突变中,12个突变变体导致TP53的转录活性完全丧失,这些突变变体被认为是致病性变体,与ALL的发病风险相关;8个突变变体导致TP53的转录活性部分丧失,其中3个变体被认为与蛋白破坏性相关,因此被列入致病性变体。1个无义突变和7个框移突变被划分为致病性突变,因为这些突变导致了p53中DNA结合核心区域的缺失。共22个变体属于致病性突变,这些突变在非ALL人群中非常罕见或未曾检测到,在ExAC数据中的6万多例检测人群中,这些突变的发生率<0.006%。15个致病性的错义突变变体中,14个位于p53基因DNA结合核心区域,如下图1B所示。


图1B. 15个致病性的错义突变变体的位置

TP53胚系突变ALL患者的特征:携带了致病性TP53突变变体的患者诊断为ALL时的年龄更大,致病性TP53突变变体、TP53 VUS突变变体和野生型TP53患者发病时的中位年龄分别为15.5岁、6.6岁和7.3岁(P<0.001),且有更低的白细胞计数。

TP53胚系突变ALL患者的治疗疗效:在AALL0232研究中,TP53致病性胚系突变的ALL患者相比于其他患者,EFS和OS显着更短(EFS HR=2.8;95%CI:1.6-5.2;P=0.0007;OS HR=3.1;95%CI:1.5-6.7;P=0.003),如下图2A。在多因素分析中,结果一致。单独分析亚二倍体ALL患者,TP53致病性突变没有预后意义;然而,在非亚二倍体ALL患者,TP53致病性突变仍然与更差的预后相关(EFS:HR=5.4;95%CI:2.2-13.0;P=0.0002;OS:HR=6.1,95%CI:2.3-16.6;P=0.0004,如下图2B)。值得一提的是,TP53的致病性突变还会增加第二原发癌的发病风险,5年累积的发生率为25.1%,而TP53 VUS突变和野生型患者,5年累积发病率为0.7%,如下图2C所示。在COG P9900研究中,4例患者检测到TP53致病性突变,其中3例患者分别表现为ALL复发,出现第二原发肿瘤和死亡。相比于其他患者,致病性突变患者的EFS和OS显着更差(EFS:HR=7.1;OS HR=14.2)。


图2. AALL0232研究中TP53致病性突变与更差的预后和第二原发癌相关

汇总分析两个研究中所有携带TP53致病突变变体的患者,结果显示,在调整了治疗方案后,致病突变仍然与更差的预后相关。在26例携带TP53致病突变变体的患者中,14例出现了终点事件,5例患者为ALL复发(占总体事件的36%),

5例患者为第二原发癌(占总体事件的36%),这一终点事件模式与TP53野生型或VUS的患者显着不同,其中ALL复发占终点事件的75%,第二原发癌作为终点事件的仅占4%,如图3A所示。在达到终点事件的亚二倍体型ALL患者中,TP53致病突变携带者出现第二原发癌的比例显着高于其他患者,分别为50% vs 5%,P=0.01,见图3B,这就提示第二原发癌的出现与TP53致病性突变相关,并不是因为ALL患者的分型。


图3. TP53不同突变状态患者出现不同恶性终点事件的比例

结论

致病性TP53胚系突变导致P53失活,与儿童ALL的发病相关,携带这类突变的ALL患者治疗效果较差,且易发第二原发癌。
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GetPortalCommentsPageByObjectIdResponse(id=280211, encodeId=5864280211b5, content=学习了.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=107, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Sat Jan 20 03:33:30 CST 2018, time=2018-01-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=279088, encodeId=2d082e908886, content=学习了.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Tue Jan 16 13:52:50 CST 2018, time=2018-01-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1302133, encodeId=c41d13021338c, content=<a href='/topic/show?id=82a6659902c' target=_blank style='color:#2F92EE;'>#淋巴细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65990, encryptionId=82a6659902c, topicName=淋巴细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372391, encodeId=ddd113e239163, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1458438, encodeId=963e1458438bd, content=<a href='/topic/show?id=50a81e6869e' target=_blank style='color:#2F92EE;'>#TP53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17686, encryptionId=50a81e6869e, topicName=TP53)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2d276073420, createdName=zblhy, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460543, encodeId=9509146054321, content=<a href='/topic/show?id=36a7596628a' target=_blank style='color:#2F92EE;'>#易感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59662, encryptionId=36a7596628a, topicName=易感性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-06-11 lidong40
  4. [GetPortalCommentsPageByObjectIdResponse(id=306692, encodeId=0ddd306692a2, content=学习了.谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08b72330853, createdName=1226d293m05暂无昵称, createdTime=Tue Apr 17 15:24:32 CST 2018, time=2018-04-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1997872, encodeId=747d199e872ac, content=<a href='/topic/show?id=75ff66001cd' target=_blank style='color:#2F92EE;'>#淋巴细胞白血病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=66001, encryptionId=75ff66001cd, topicName=淋巴细胞白血病)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1be8234, createdName=sunyl07, createdTime=Fri Oct 05 19:42:00 CST 2018, time=2018-10-05, status=1, ipAttribution=), 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style='color:#2F92EE;'>#淋巴细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65990, encryptionId=82a6659902c, topicName=淋巴细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372391, encodeId=ddd113e239163, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1458438, encodeId=963e1458438bd, content=<a href='/topic/show?id=50a81e6869e' target=_blank style='color:#2F92EE;'>#TP53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17686, encryptionId=50a81e6869e, topicName=TP53)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2d276073420, createdName=zblhy, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460543, encodeId=9509146054321, content=<a href='/topic/show?id=36a7596628a' target=_blank style='color:#2F92EE;'>#易感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59662, encryptionId=36a7596628a, topicName=易感性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-01-27 1209e435m98(暂无昵称)

    学习了.谢谢分享

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=306692, encodeId=0ddd306692a2, content=学习了.谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08b72330853, createdName=1226d293m05暂无昵称, createdTime=Tue Apr 17 15:24:32 CST 2018, time=2018-04-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1997872, encodeId=747d199e872ac, content=<a href='/topic/show?id=75ff66001cd' target=_blank style='color:#2F92EE;'>#淋巴细胞白血病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=66001, encryptionId=75ff66001cd, topicName=淋巴细胞白血病)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1be8234, createdName=sunyl07, createdTime=Fri Oct 05 19:42:00 CST 2018, time=2018-10-05, status=1, ipAttribution=), 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style='color:#2F92EE;'>#淋巴细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65990, encryptionId=82a6659902c, topicName=淋巴细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372391, encodeId=ddd113e239163, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1458438, encodeId=963e1458438bd, content=<a href='/topic/show?id=50a81e6869e' target=_blank style='color:#2F92EE;'>#TP53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17686, encryptionId=50a81e6869e, topicName=TP53)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2d276073420, createdName=zblhy, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460543, encodeId=9509146054321, content=<a href='/topic/show?id=36a7596628a' target=_blank style='color:#2F92EE;'>#易感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59662, encryptionId=36a7596628a, topicName=易感性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-01-20 1209e435m98(暂无昵称)

    学习了.谢谢分享

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=306692, encodeId=0ddd306692a2, content=学习了.谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08b72330853, createdName=1226d293m05暂无昵称, createdTime=Tue Apr 17 15:24:32 CST 2018, time=2018-04-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1997872, encodeId=747d199e872ac, content=<a href='/topic/show?id=75ff66001cd' target=_blank style='color:#2F92EE;'>#淋巴细胞白血病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=66001, encryptionId=75ff66001cd, topicName=淋巴细胞白血病)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1be8234, createdName=sunyl07, createdTime=Fri Oct 05 19:42:00 CST 2018, time=2018-10-05, status=1, ipAttribution=), 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style='color:#2F92EE;'>#淋巴细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65990, encryptionId=82a6659902c, topicName=淋巴细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372391, encodeId=ddd113e239163, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1458438, encodeId=963e1458438bd, content=<a href='/topic/show?id=50a81e6869e' target=_blank style='color:#2F92EE;'>#TP53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17686, encryptionId=50a81e6869e, topicName=TP53)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2d276073420, createdName=zblhy, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460543, encodeId=9509146054321, content=<a href='/topic/show?id=36a7596628a' target=_blank style='color:#2F92EE;'>#易感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59662, encryptionId=36a7596628a, topicName=易感性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-01-16 1209e435m98(暂无昵称)

    学习了.谢谢分享

    0

  7. 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style='color:#2F92EE;'>#淋巴细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65990, encryptionId=82a6659902c, topicName=淋巴细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372391, encodeId=ddd113e239163, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1458438, encodeId=963e1458438bd, content=<a href='/topic/show?id=50a81e6869e' target=_blank style='color:#2F92EE;'>#TP53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17686, encryptionId=50a81e6869e, topicName=TP53)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2d276073420, createdName=zblhy, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460543, encodeId=9509146054321, content=<a href='/topic/show?id=36a7596628a' target=_blank style='color:#2F92EE;'>#易感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59662, encryptionId=36a7596628a, topicName=易感性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
  8. 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style='color:#2F92EE;'>#淋巴细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=65990, encryptionId=82a6659902c, topicName=淋巴细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1372391, encodeId=ddd113e239163, content=<a href='/topic/show?id=9d861362e53' target=_blank style='color:#2F92EE;'>#p53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13627, encryptionId=9d861362e53, topicName=p53)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5d70341, createdName=zhishijing, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1458438, encodeId=963e1458438bd, content=<a href='/topic/show?id=50a81e6869e' target=_blank style='color:#2F92EE;'>#TP53#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17686, encryptionId=50a81e6869e, topicName=TP53)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2d276073420, createdName=zblhy, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460543, encodeId=9509146054321, content=<a href='/topic/show?id=36a7596628a' target=_blank style='color:#2F92EE;'>#易感性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=59662, encryptionId=36a7596628a, topicName=易感性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-01-15 zhishijing
  9. 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createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-01-15 zblhy
  10. 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createdBy=f6af6344165, createdName=FukaiBao, createdTime=Mon Jan 15 12:42:00 CST 2018, time=2018-01-15, status=1, ipAttribution=)]
    2018-01-15 FukaiBao

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来源于间叶组织(包括结缔组织和肌肉)的恶性肿瘤称为“肉瘤”,多发生于皮肤、皮下、骨膜及长骨两端。肉瘤属于恶性肿瘤病变。近期有研究者对骨与软组织肉瘤患者进行了基因组测序,探究其遗传基础。 研究纳入的1162名≥15岁肉瘤患者,分别来自4个队列,组织学证实肉瘤诊断。收集患者详细临床、病理和家系遗传信息等。对血液(n=1114)或唾液(n=48)样本进行外显子测序(调查72个与癌症风险增加有关的基

CLIN CANCER RES:肺癌TP53及KRAS突变预测阻断PD-1免疫治疗反应

临床研究表明在非小细胞肺癌(NSCLC)中靶向PD-1及PD-L1信号通路治疗具有前景,但是能够预测对检查点抑制剂治疗有反应的患者特征尚缺乏研究。CLIN CANCER RES近期发表了一篇文章,研究TP53及KRAS突变预测PD-1免疫治疗反应。

Oncotarget:PARP1表达和TP53状态是区分胶质母细胞瘤亚型可靠标记物

胶质母细胞瘤(GBM)是星形细胞肿瘤中恶性程度最高的胶质瘤。肿瘤位于皮质下,多数生长于幕上大脑半球各处。

Blood:TP53高表达,可用于预测MCL患者预后不良。

目前,预测套细胞淋巴瘤治疗失败和总体存活时间是基于临床因素,包含套细胞淋巴瘤国际预后指数(MIPI)和根据Ki67评估的增殖情况。然而,P53和SOX11的免疫组化也可提高风险分层。Sietse M.Aukema等人在目前最新发表的淋巴瘤样本(365例)中行免疫组化检测SOX11和P53。所有患者都接受了欧洲MCL网络的前瞻性试验。在包含了MIPI和Ki67的多变量分析中,SOX11表达与患者治疗

Cancer Discov:基于小鼠模型鉴定三阴性乳腺癌散发型致癌基因突变及治疗策略

三阴性乳腺癌(TNBC)常出现TP53突变,而其他常见癌基因的点突变出现频率较低,因而其对靶向治疗效果不佳。应用全外显子测序(WES)和RNA测序,本研究鉴定了小鼠TNBC模型在TP53突变(或合并Brca1缺失)情况下的的体细胞遗传学改变谱。约50%的肿瘤出现基因扩增或易位导致的癌蛋白升高(或癌蛋白融合),合并基因的框架移位突变。尽管TNBC体细胞遗传改变的频谱多样化,但是大多数改变都可激活MA

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