首页> 美国卫生研究院文献>Journal of Virology >Properties of a murine retroviral recombinant of avian acute leukemia virus E26: a murine fibroblast assay for v-ets function.
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Properties of a murine retroviral recombinant of avian acute leukemia virus E26: a murine fibroblast assay for v-ets function.

机译:禽急性白血病病毒E26的鼠逆转录病毒重组体的特性:鼠成纤维细胞检测v-ets功能。

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摘要

A replication-defective murine retroviral construct, termed pME26, was generated by inserting avian gag-myb-ets sequences derived from the cloned avian acute leukemia virus E26 into an Abelson murine leukemia virus-derived retroviral vector. ME26 virus can be rescued efficiently from transfected NIH 3T3 cells by replicating murine leukemia viruses. Either pME26-transfected nonproducers or ME26 virus-infected NIH 3T3 cells expressed a 135-kilodalton fusion protein (p135) which was detectable by immunoprecipitation with antiserum directed against avian leukemia virus p27gag, myb or ets oncogene protein, or murine leukemia virus p15gag and was principally localized in the nucleus. NIH 3T3 cells infected with ME26 exhibited morphological alterations and increased proliferation in reduced serum and formed small colonies in agar suspension. Discrete foci could be readily recognized in cells maintained in a defined medium containing 0.03 to 0.1% calf serum. In newborn NFS/N mice, ME26 induced a significantly higher mortality and incidence of erythroid and myeloid leukemias. Analysis of a series of mutants affecting the expression of various portions of p135 indicated that the v-ets gene acts to mitogenically stimulate the proliferation of NIH 3T3 fibroblasts and reduces or abolishes their serum dependence. These properties provide an assay system to study functions of the ets gene family.
机译:通过将衍生自克隆的禽急性白血病病毒E26的禽gag-myb-ets序列插入Abelson鼠白血病病毒衍生的逆转录病毒载体中,产生了称为pME26的复制缺陷型鼠逆转录病毒构建体。通过复制鼠白血病病毒,可以从转染的NIH 3T3细胞中有效地拯救出ME26病毒。被pME26转染的非生产者或被ME26病毒感染的NIH 3T3细胞表达的135-千达尔顿融合蛋白(p135)可通过针对禽白血病病毒p27gag,myb或ets癌基因蛋白或鼠白血病病毒p15gag的抗血清免疫沉淀进行检测。主要位于细胞核中。感染了ME26的NIH 3T3细胞在减少的血清中表现出形态学改变和增殖增加,并在琼脂悬浮液中形成小菌落。在包含0.03%至0.1%小牛血清的特定培养基中维持的细胞中,容易发现离散的病灶。在新生的NFS / N小鼠中,ME26诱导了较高的死亡率以及红系和髓系白血病的发病率。对影响p135各个部分表达的一系列突变体的分析表明,v-ets基因可促有丝分裂地刺激NIH 3T3成纤维细胞的增殖,并降低或消除其血清依赖性。这些特性提供了一种用于研究ets基因家族功能的测定系统。

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