...
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Mutant Ikzf1 Kras~(G12D), and Notch1 cooperate in T lineage leukemogenesis and modulate responses to targeted agents
【24h】

Mutant Ikzf1 Kras~(G12D), and Notch1 cooperate in T lineage leukemogenesis and modulate responses to targeted agents

机译:突变的Ikzf1 Kras〜(G12D)和Notch1在T谱系白血病发生中合作并调节对靶向药物的反应

获取原文
获取原文并翻译 | 示例
           

摘要

Mice that accurately model the genetic diversity found in human cancer are valuable tools for interrogating disease mechanisms and investigating novel therapeutic strategies. We performed insertional mutagenesis with the MOL4070LTR retrovirus in Mx1-Cre, Kras~(G12D) mice and generated a large cohort of T lineage acute lymphoblastic leukemias (T-ALLs). Molecular analysis infers that retroviral integration within Ikzf1 is an early event in leukemogenesis that precedes Kras~(G12D) expression and later acquisition of somatic Notch 1 mutations. Importantly, biochemical analysis uncovered unexpected heterogeneity, which suggests that Ras signaling networks are remodeled during multistep tumorigenesis. We tested tumor-derived cell lines to identify biomarkers of therapeutic response to targeted inhibitors. Whereas all T-ALLs tested were sensitive to a dual-specificity phosphoinosityl 3-kinase/mammalian target of rapamycin inhibitor, biochemical evidence of Notchi activation correlated with sensitivity to y-secretase inhibition. In addition, Kras~(G12D) T-ALLs were more responsive to a MAP/ERK kinase inhibitor in vitro and in vivo. Together, these studies identify a genetic pathway involving Ikzfl, Kras~(G12D), and Notch1 in T lineage leukemogenesis, reveal unexpected diversity in Ras-regulated signaling networks, and define biomarkers of drug responses that may inform treatment strategies.
机译:准确地模拟人类癌症中发现的遗传多样性的小鼠是用于研究疾病机理和研究新颖治疗策略的有价值的工具。我们在Mx1-Cre,Kras〜(G12D)小鼠中用MOL4070LTR逆转录病毒进行了插入诱变,并产生了大量T系急性淋巴细胞白血病(T-ALLs)。分子分析推断,Ikzf1内的逆转录病毒整合是白血病发生中的一个早期事件,发生在Kras〜(G12D)表达之前,随后是体细胞Notch 1突变的获得。重要的是,生化分析发现了意料之外的异质性,这表明Ras信号网络在多步肿瘤发生过程中被重塑。我们测试了肿瘤来源的细胞系,以鉴定对靶向抑制剂的治疗反应的生物标志物。尽管测试的所有T-ALL对雷帕霉素抑制剂的双重特异性磷酸肌醇3激酶/哺乳动物靶标均敏感,但Notchi活化的生化证据与对y分泌酶抑制的敏感性相关。此外,在体外和体内,Kras〜(G12D)T-ALLs对MAP / ERK激酶抑制剂的反应更强。总之,这些研究确定了在T谱系白血病发生过程中涉及Ikzfl,Kras〜(G12D)和Notch1的遗传途径,揭示了Ras调控信号网络中意想不到的多样性,并定义了可作为治疗策略参考的药物反应生物标志物。

著录项

  • 来源
  • 作者单位

    Departments of Pediatrics, University of California, San Francisco, CA 94143;

    rnDepartments of Medicine, University of California, San Francisco, CA 94143;

    rnDepartments of Pediatrics, University of California, San Francisco, CA 94143;

    rnDepartments of Pediatrics, University of California, San Francisco, CA 94143;

    rnDepartment of Molecular Virology, Immunology, and Medical Genetics, Ohio State University, Columbus, OH 43210;

    rnDepartments of Pediatrics, University of California, San Francisco, CA 94143;

    rnDepartments of Pediatrics, University of California, San Francisco, CA 94143;

    rnDepartments of Laboratory Medicine, University of California, San Francisco, CA 94143;

    rnDepartments of Pharmaceutical Chemistry, University of California, San Francisco, CA 94143;

    rnLaboratory of Cellular Oncology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892;

    rnDepartments of Pediatrics, University of California, San Francisco, CA 94143;

    rnDepartments of Pediatrics, University of California, San Francisco, CA 94143;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    K-ras; retroviral insertional mutagenesis; T cell leukemia; targeted therapeutics; Ikaros;

    机译:K-ras;逆转录病毒插入诱变;T细胞白血病;靶向治疗;伊卡罗斯;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号