盘点:近期肾细胞癌研究进展盘点

2018-05-20 AlexYang MedSci原创

肾细胞癌(简称肾癌)是泌尿系统中恶性程度较高的肿瘤,也是最常见的肿瘤之一,又称肾腺癌,占肾恶性肿瘤的80%~90%。据调查,肾细胞癌在我国泌尿生殖系统肿瘤中占第二位,仅次于膀胱肿瘤,占成人恶性肿瘤的2%~3% 、小儿恶性肿瘤的20%左右。男女发病率有明显差异,据统计,男女之比为2:1。肾细胞癌的发病率随年龄增大而升高,有资料显示,肾细胞癌的高发年龄在40~55岁。此外,肾细胞癌发病率有明显的国

肾细胞癌(简称肾癌)是泌尿系统中恶性程度较高的肿瘤,也是最常见的肿瘤之一,又称肾腺癌,占肾恶性肿瘤的80%~90%。据调查,肾细胞癌在我国泌尿生殖系统肿瘤中占第二位,仅次于膀胱肿瘤,占成人恶性肿瘤的2%~3% 、小儿恶性肿瘤的20%左右。男女发病率有明显差异,据统计,男女之比为2:1。肾细胞癌的发病率随年龄增大而升高,有资料显示,肾细胞癌的高发年龄在40~55岁。此外,肾细胞癌发病率有明显的国际差异,欧美国家明显高于亚洲国家,日本、印度等国的发病率较低。城市发病率高于农村。梅斯医学小编整理了近期前列腺癌的研究进展,与大家一起分享学习!


原发透明细胞肾细胞癌(ccRCC)的基因组背景已经有详细的阐释。然而,关于群体基因组变异(GA)背景在ccRCC转移中的情况所知甚少,或者说与原发性肿瘤在总体上的基因组背景差异情况。研究人员认为,转移性肿瘤的基因组背景也许具有生物学、临床和治疗应用。

研究主要运用了二代测序技术。群体1(n=578)包括了348个原发性肿瘤案例和229个转移性肿瘤案例。总的来讲,转移性肿瘤中最为常见的变异为VHL (66.8%)、PBRM1 (41.87%)、和SETD2 (24.7%)。TP53变异在转移性肿瘤中要比原发性肿瘤频率更高(14.85% vs 8.9%; p=0.031)。其他基因在转移性肿瘤群体和原发性肿瘤群体中的变异没有显著的差异。另外,变异压力在转移性肿瘤和原发性肿瘤之间和转移位点之间没有显著的不同。群体2(n=257)包括了177个原发性肿瘤案例和80个转移性肿瘤案例。同样,在变异频率和变异压力上,两组之间没有显著差异。

最后,研究人员指出,他们的数据支持了ccRCC原发性肿瘤和转移性肿瘤包含了常见基因变异的均匀分布理论。


在阶段3 METEOR试验中(NCT01865747)的抗血管生成治疗之后,与依维莫司药物相比,卡博替尼在晚期肾细胞癌(RCC)患者中能够显著提高无进展自由生存、总生存和客观反映率。在320例记录死亡的第二个中间分析中,研究人员观察到了在总生存方面的显著提升。

最近,有研究人员将患有晚期RCC的658名且至少接受1种VEGFR 酪氨酸激酶抑制剂治疗的患者随机分成2个小组,即卡博替尼组(60mg每天)和依维莫司组(10mg每天)。生存跟踪调查持续到预先指定在最终分析中的408名患者全部死亡。

研究发现,在430名患者死亡中,198名在卡博替尼组,232名在依维莫司组。卡博替尼组和依维莫司组的平均总生存分别为21.4个月和17.1个月(HR 0.70, 95% CI 0.58-0.85 ; P= 0.0002)。另外,卡博替尼和依维莫司的安全性分析与之前的报道一致。最后,研究人员指出,在治疗过的患有晚期RCC患者中,与依维莫司相比,卡博替尼能够显著的提高总生存,并且该结果在长期的跟踪调查结果中具有一致性。


癌症基因表达的逆转能够预测治疗方法的潜力,并且可以为已经存在的药物发现新的应用方法(药物重新定位)。基因表达逆转潜力在几乎所有的研究中都进行了估算,方法是通过预先将所有肿瘤样本聚集到单一组标签中或者有限的几个分子亚型组标签中。

最近,有研究人员调查了是否基于个性化的肿瘤样本基因表达特征的药物重新定位能够优于肿瘤组和亚型组标签药物的使用。研究人员利用来自于530名透明细胞肾细胞癌(ccRCC)患者的534的肿瘤样本和72个匹配的正常样本估算肿瘤特性。研究人员从CMAP何LINCS数据库中提取了不少于20000的药物标签。研究表明,个体肿瘤样本的阴性富集与在药物标签中差异化表达的基因数量(Spearman's rho=0.15)要比肿瘤组标签(Rho=0.08)和4种肿瘤亚型标签(Rho 0.036-0.11)的相关性更好。另外,针对ccRCC的靶标药物,比如雷帕霉素和西罗莫司脂化物,在预先聚集的肿瘤标签中不能被鉴定到,而在使用个性化样本分析中能够被鉴定。

最后,研究人员指出,可以通过考虑个人的肿瘤样本基因表达分析来对药物重新定位进行个性化定制。


TGF-β能够调控各种类型癌症细胞的肿瘤形成和迁移能力。然而,在透明细胞肾细胞癌中(ccRCC),TGF-β信号组分的丢失是怎样影响这些能力的机制仍旧不清楚。

最近,有研究人员调查了TGFBR3(TGF-β类型III受体,即β蛋白聚糖)在ccRCC中的作用和角色。数据分析表明,TGFBR3在ccRCC组织中表达减少,这与在病人中不良的预后相关。利用免疫低下小鼠的原位接种试验表明,TGFBR3在ccRCC细胞中的低表达增强了初级肿瘤的形成和肺转移。在TGFBR3存在的情况下,TGF-β2减少了乙醛脱氢酶(ALDH)阳性ccRCC细胞群体,并且肾癌症起始细胞富集。另外,TGFBR3功能的丧失在细胞培养基中也可增强细胞迁移能力以及以独立于TGF-β的方式诱导几种间叶细胞标记的表达。TGFBR3下调时同样观察到了FAK-PI3K信号促使的片状伪足形成的增加,并且在ccRCC细胞中有助于不依赖TGF-β的细胞迁移。

总之,研究人员指出,他们的研究阐释了TGFBR3功能的丧失赋予了ccRCC细胞多种代谢能力,具体是通过依赖和不依赖TGF-β通路来实现的。


肾细胞膜入侵(RCI)和淋巴血管入侵(LVI)是肾细胞癌(RCC)显著的潜在预后因子。最近,有研究人员基于大规模多个群体,评估了RCI和LVI在局部透明细胞肾细胞癌中的独立的预后影响。

研究包括了6849名经历了因RCC而经历根治性或者部分肾切除术的病人。研究人员通过构建统计学模型并且组合Cox比例风险回归和倾向评分匹配对RCI或LVI与复发的相关性进行了分析。为了分析RCI,研究共募集了2733名病人,其中包括了603名患有RCI的病人。为了分析LVI,研究共募集了3586名病人,其中包括了121名患有LVI的病人。研究发现,在患有RCI病人中,复发人数为75名(12.4%);而在不患有RCI的病人中,复发人数为134名(6.3%)。在所有的统计学模型中,RCI与复发风险的增加显著相关。另外,复发在LVI病人中复发人数为29(24%),在不患有LVI病人中为207(6.0%)。另外,LVI与复发风险的增加显著的相关性仅在非调整过的单变量模型中存在,在多变量调整后的分析或者倾向评分匹配模型中不具有显著性。总之,这些发现表明了RCI可以作为局部透明细胞RCC复发的显著性风险因素。与RCI相反,LVI不能作为一个独立的预后变量。

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    2018-05-29 131****1460

    学习了受益匪浅

    0

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  4. [GetPortalCommentsPageByObjectIdResponse(id=1978682, encodeId=3d7419e8682a4, content=<a href='/topic/show?id=3b90e79787f' target=_blank style='color:#2F92EE;'>#细胞癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77978, encryptionId=3b90e79787f, topicName=细胞癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e457184, createdName=qingting, createdTime=Sat Nov 17 01:29:00 CST 2018, time=2018-11-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=319732, encodeId=40a2319e3204, content=学习了受益匪浅, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDicHg2ldsSNmib46PmdzpO7CQEmPjuULp1v45zPWwMYhrnXgvl3OtmUCZSQfgITWn96X9moL94nUGA/0, createdBy=28072041016, createdName=131****1460, createdTime=Tue May 29 19:50:49 CST 2018, time=2018-05-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1381006, encodeId=17fa1381006b8, content=<a href='/topic/show?id=9281e34519b' target=_blank style='color:#2F92EE;'>#研究进展#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73451, encryptionId=9281e34519b, topicName=研究进展)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f13d475, createdName=mashirong, createdTime=Tue May 22 10:29:00 CST 2018, time=2018-05-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=317265, encodeId=6f4731e2653b, content=学习了受益匪浅, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDicHg2ldsSNmib46PmdzpO7CQEmPjuULp1v45zPWwMYhrnXgvl3OtmUCZSQfgITWn96X9moL94nUGA/0, createdBy=28072041016, createdName=131****1460, createdTime=Mon May 21 19:48:13 CST 2018, time=2018-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=317001, encodeId=808231e0017e, content=谢谢分享学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM4o2XVpJ6449yqDsjibydI5HnJ8MibGxNn4HZiaZib0bdfibbwoz3KQrIyN9AGxq36ZlZRNicYlPfOOWMtwgsajY6mGNFiaPclFdowjD0/0, createdBy=97bd1338592, createdName=清风拂面, createdTime=Sun May 20 21:38:07 CST 2018, time=2018-05-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=316982, encodeId=8fdc31698296, content=学习了.谢谢作者分享!, 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/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Sun May 20 19:42:40 CST 2018, time=2018-05-20, status=1, ipAttribution=)]
    2018-05-21 131****1460

    学习了受益匪浅

    0

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    2018-05-20 清风拂面

    谢谢分享学习

    0

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    2018-05-20 虈亣靌

    学习了.谢谢作者分享!

    0

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