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排序方式: 共有83条查询结果,搜索用时 15 毫秒
1.
Zhang Z Lee JC Lin L Olivas V Au V LaFramboise T Abdel-Rahman M Wang X Levine AD Rho JK Choi YJ Choi CM Kim SW Jang SJ Park YS Kim WS Lee DH Lee JS Miller VA Arcila M Ladanyi M Moonsamy P Sawyers C Boggon TJ Ma PC Costa C Taron M Rosell R Halmos B Bivona TG 《Nature genetics》2012,44(8):852-860
Human non-small cell lung cancers (NSCLCs) with activating mutations in EGFR frequently respond to treatment with EGFR-targeted tyrosine kinase inhibitors (TKIs), such as erlotinib, but responses are not durable, as tumors acquire resistance. Secondary mutations in EGFR (such as T790M) or upregulation of the MET kinase are found in over 50% of resistant tumors. Here, we report increased activation of AXL and evidence for epithelial-to-mesenchymal transition (EMT) in multiple in vitro and in vivo EGFR-mutant lung cancer models with acquired resistance to erlotinib in the absence of the EGFR p.Thr790Met alteration or MET activation. Genetic or pharmacological inhibition of AXL restored sensitivity to erlotinib in these tumor models. Increased expression of AXL and, in some cases, of its ligand GAS6 was found in EGFR-mutant lung cancers obtained from individuals with acquired resistance to TKIs. These data identify AXL as a promising therapeutic target whose inhibition could prevent or overcome acquired resistance to EGFR TKIs in individuals with EGFR-mutant lung cancer. 相似文献
2.
Birds of a Feather Protest Together: Theorizing Self-Organizing Political Protests with Flock Theory 总被引:1,自引:0,他引:1
The current research theorizes decentralized and self-organized political protests via flock theory (Rosen 2002), a theory of emergent self-organization in communicative human interaction. Flock theory draws from a theoretical basis
of emergence and self-organizing systems, and is presented as a theory of decentralized communication structures. Focusing
on the optimization of decentralized networks and roadmap based coordination of organizationally homopholous foci; the current
theory poses a model of human interaction that captures the potentially egalitarian effects of cooperative evolution and collective
action. Case studies of two separate decentralized political protests against Korean government and FARC are offered as evidences
of such phenomena. 相似文献
3.
- 《南京林业大学学报(自然科学版)》2010,34(5):168-168
松萎蔫病是一种非常复杂的病害。据报道,松材线虫(Bursaphelenchus xylophilus)及其携带的细菌诱导了该病,但是对于细菌的的作用尚存争议。笔者筛选出杀细菌剂进行了温室和林间防治松萎蔫病的实验。利用每株3年生赤松(Pinus densiflora)注射3 mg的恶喹酸,松萎蔫病防效达到71 %。利用恶喹酸或阿维菌素及两者混合物对大约20年生赤松的试验表明,3种处理均显示了很高的防效。以上结果证明伴生细菌是诱导松萎蔫病的必要因素,对松萎蔫病可利用杀细菌剂或杀细菌剂与杀线剂混合物进行防控。 相似文献
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介绍了一个现代的综合银行业务处理系统的设计思想和实现技术.该系统采用目前国内外银行系统业务处理先进思想,以IBMAS/400计算机为主机,以WINDOWSNT网络为前台工作站,利用目前国内较为流行的计算机软件技术开发完成.整个系统在综合帐务处理、综合客户信息管理和综合柜员制模式下,完成对公、对私、国际业务、金融卡、同业往来、内部核算等银行业务的集中处理;提供柜台业务、电话银行、网点客户终端、企业/家庭银行、ATM存取款、POS等服务手段;实现了辖内资金实时清算、异地私人储蓄通存通兑、异地对公资金实时到帐的电子联行 相似文献
6.
Tool wear, chatter vibration, chip breaking and built-up edge are main phenomena to be monitored in modern manufacturing processes, which are considered as important factors to the quality of products.They are closely related to the cutting parameters, which are to be selected in manufacturing process.However, it is very difficult to measure directly the cutting quality based on on-line monitoring.In this study, the relationship between the cutting parameters and cutting quality is analyzed.A Radical Basis Function (RBF) neural network based on-line quality recognition scheme is also presented, which monitors the level of surface roughness.The experimental results reveal that the RBF neural network has a high prediction success rate. 相似文献
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本文讨论了ZnO、TiO_2、Cr_2O_3、CuO、SiO_2和Ni_2O_3等金属氧化物作为NiTPP的载体对分解NO活性的影响.除比表面因素的影响以外,发现了NiTPP吸附在n型半导体类型的载体(ZnO、TiO_2、Cr_2O_3)上,其催化分解NO的活性比吸附在其它类型的载体上的催化活性高.实验是在GD-05型高压釜中进行的,反应温度250℃,反应压力为2×10~5Pa. 相似文献
9.
为使OPTO 22控制系统实现控制器热备份,需要解决主控制器与备份控制器之间的连接组织、数据交换、故障识别和自动切换等一系列问题.根据实践提出解决方案,对OPTO22控制系统的热备过程应注意的几个问题提出了解决方法并进行了分析. 相似文献
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