《LPE-1,以LSD1为靶点抑制人食管鳞状细胞癌的生长及转移》

  • 来源专题:重大新药创制—研发动态
  • 编译者: 杜慧
  • 发布时间:2017-06-09
  • 组蛋白赖氨酸去甲基化酶 1 (LSD1) 在表观遗传修饰中具有重要作用, LSD1 的异常表达可以预测食管癌的肿瘤进展和不良预后。本研究中,我们合成了一系列 LSD1 抑制剂,并证明了它们对人食管鳞状细胞癌有强大的抑制作用。数据表明这些 LSD1 抑制剂选择性地抑制食管癌细胞系 (EC-109) 。其中,化合物LPE-1(LSD1 IC50 = 0.336 ± 0.003 μ M)可显著抑制细胞增殖、 诱导细胞凋亡、 阻断EC109 细胞G2/M 期,并引起相关的蛋白标志物变化。我们还发现化合物 LPE-1 可有效抑制EC 109的迁移和浸润。体内研究表明化合物LPE-1可抑制异种移植模型的肿瘤生长而没有明显的毒性。总之,我们的研究结果表明 LSD1 可能是食管鳞癌潜在的治疗靶点,化合物LPE-1可作为抗鳞癌药物研发的先导化合物以进行进一步研究。

相关报告
  • 《LSD1:作为癌症治疗靶点的临床前研究》

    • 来源专题:生物医药
    • 编译者:杜慧
    • 发布时间:2023-12-07
    • LSD1(lysine-specific demethylase 1)作为组蛋白赖氨酸去甲基化酶,主要去除H3K4和H3K9位点的一甲基化和二甲基化,已成为各种癌症的重要治疗靶点。LSD1 可调控一系列影响癌症发展、恶化、转移和耐药性的生物学过程。最近的研究揭示了 LSD1 生物学的新方面,阐明了它参与免疫原性、抗肿瘤免疫和 DNA 损伤反应的情况。这些新发现有可能被用于设计有效的 LSD1 靶向疗法。 本文讨论了 LSD1 生物学领域的最新进展,重点关注其在调节免疫原性、抗肿瘤免疫和 DNA 损伤应答机制中的作用。对这些机制的新认识为开发治疗癌症的新型 LSD1 靶向疗法提供了可能性。此外,本文还概述了基于 LSD1 抑制剂的癌症联合疗法。对LSD1生物学的探索和LSD1靶向疗法的开发为未来的癌症治疗带来了巨大希望。
  • 《以病毒和细胞为靶点抑制HIV-1复制的RNA干扰技术》

    • 来源专题:艾滋病防治
    • 编译者:李越
    • 发布时间:2005-04-17
    • Human immunodeficiency virus type 1 (HIV-1) gene expression is regulated by both cellular transcription factors and Tat. The ability of Tat to stimulate transcriptional elongation is dependent on its binding to TAR RNA in conjunction with cyclin T1 and CDK9. A variety of other cellular factors that bind to the HIV-1 long terminal repeat, including NF-κB, SP1, LBP, and LEF, are also important in the control of HIV-1 gene expression. Although these factors have been demonstrated to regulate HIV-1 gene expression by both genetic and biochemical analysis, in most cases a direct in vivo demonstration of their role on HIV-1 replication has not been established. Recently, the efficacy of RNA interference in mammalian cells has been shown utilizing small interfering RNAs (siRNAs) to result in the specific degradation of host mRNAs and decreases the levels of their corresponding proteins. In this study, we addressed whether siRNAs directed against either HIV-1 tat or reverse transcriptase or the NF-κB p65 subunit could specifically decrease the levels of these proteins and thus alter HIV-1 replication. Our results demonstrate the specificity of siRNAs for decreasing the expression of these viral and cellular proteins and inhibiting HIV-1 replication. These studies suggest that RNA interference is useful in exploring the biological role of cellular and viral regulatory factors involved in the control of HIV-1 gene expression