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    • 1. 发明申请
    • Inhibition of mRNA Interferase-Induced Apoptosis in BAK-Deficient and BAK- and Bax-Deficient Mammalian Cells
    • 抑制BAK缺陷型和BAK-和Bax-缺陷型哺乳动物细胞中mRNA干扰素诱导的细胞凋亡
    • US20090047742A1
    • 2009-02-19
    • US12064070
    • 2006-08-22
    • Tsutomu ShimazuKurt DegenhardtEileen WhiteMasayori Inouye
    • Tsutomu ShimazuKurt DegenhardtEileen WhiteMasayori Inouye
    • C12N15/87C12N5/06
    • A61K48/0066A61K48/00C07K14/4747C12N9/22C12N2800/40
    • Ribonucleases, antibiotics, bacterial toxins and viruses inhibit protein synthesis, which results in apoptosis in mammalian cells. How the BCL-2 family of proteins regulates apoptosis in response to shutoff of protein synthesis is not known. According to the present invention, an Escherichia coli toxin MazF inhibited protein synthesis by cleavage of cellular mRNA, and induced apoptosis in mammalian cells. MazF-induced apoptosis required proapoptotic BAK and its upstream regulator, the proapoptotic BH3-only protein NBK/BIK, but not BIM, PUMA or NOXA. Furthermore, NBK/BIK- or BAK-deficient cells were resistant to cell death induced by pharmacologic inhibition of translation and by virus-mediated shutoff of protein synthesis. Thus, the BH3-only protein NBK/BIK is the apical regulator of a BAK-dependent apoptotic pathway in response to shutoff of protein synthesis. Although NBK/BIK is dispensable for development, it is the BH3-only protein targeted for inactivation by viruses, suggesting that it plays a role in pathogen/toxin response through apoptosis activation.
    • 核糖核酸酶,抗生素,细菌毒素和病毒抑制蛋白质合成,导致哺乳动物细胞凋亡。 BCL-2家族蛋白质如何调节蛋白质合成关闭反应的凋亡是未知的。 根据本发明,大肠杆菌毒素MazF通过切割细胞mRNA抑制蛋白质合成,并诱导哺乳动物细胞的细胞凋亡。 MazF诱导的细胞凋亡需要促凋亡BAK及其上游调节因子,即促凋亡BH3蛋白NBK / BIK,而不是BIM,PUMA或NOXA。 此外,NBK / BIK-或BAK缺陷细胞对由翻译的药理学抑制和蛋白质合成的病毒介导的切断引起的细胞死亡具有抗性。 因此,仅BH3蛋白NBK / BIK是响应于蛋白质合成关闭的BAK依赖性凋亡途径的顶端调节剂。 虽然NBK / BIK是不可开发的,但是仅针对通过病毒灭活的BH3蛋白,这表明它通过凋亡激活在病原体/毒素反应中起作用。
    • 6. 发明授权
    • Cells having oncogene-suppressed p53-mediated apoptosis and methods of
use to identify anti-oncogenic compounds
    • 具有致癌基因抑制p53介导的凋亡的细胞和用于鉴定抗致癌化合物的方法
    • US5604113A
    • 1997-02-18
    • US224209
    • 1994-04-07
    • Eileen WhiteShuin-Kwei ChiouHuey-Jen L. Lin
    • Eileen WhiteShuin-Kwei ChiouHuey-Jen L. Lin
    • G01N33/50C12Q1/02C12N5/06
    • G01N33/5011
    • The present invention is a method for determining if a compound potentially modulates the ability of a putative oncogene to suppress p53-mediated effects, comprising (A) adding an amount of said compound to genetically engineered cells that express (i) a gene product that induces p53 mediated apoptosis; (ii) a gene product for a p53 gene, wherein either the gene or the gene product are externally controllable; and (iii) a putative oncogene that inhibits the effect of the gene product that induces p53 mediated apoptosis, and (B) examining said cells to determine whether apoptosis has occurred. In particular, the invention provides a method wherein said gene product that induces p53 mediated apoptosis is adenovirus gene E1A, wherein said externally controllable p53 gene product is a temperature-sensitive mutant of p53, and wherein the putative oncogene is selected from the group bcl-2, ras, or the adenovirus E1B(19K) gene. In addition, the invention provides genetically engineered cell lines that can be used to carry out the methods described.
    • 本发明是一种用于确定化合物是否潜在地调节推定的癌基因抑制p53介导的作用的能力的方法,其包括(A)向转基因工程细胞中加入一定量的所述化合物,所述细胞表达(i)诱导的基因产物 p53介导凋亡; (ii)p53基因的基因产物,其中所述基因或基因产物可外部控制; 和(iii)抑制诱导p53介导的凋亡的基因产物的作用的推定的癌基因,和(B)检查所述细胞以确定是否发生细胞凋亡。 特别地,本发明提供了一种方法,其中所述诱导p53介导的细胞凋亡的基因产物是腺病毒基因E1A,其中所述外部可控的p53基因产物是p53的温度敏感突变体,其中推定的致癌基因选自bcl- 2,ras或腺病毒E1B(19K)基因。 此外,本发明提供可用于实施所述方法的基因工程细胞系。