首页> 外文期刊>Molecular and Cellular Biology >Selection against PUMA Gene Expression in Myc-Driven B-Cell Lymphomagenesis
【24h】

Selection against PUMA Gene Expression in Myc-Driven B-Cell Lymphomagenesis

机译:Myc驱动的B细胞淋巴瘤形成中针对PUMA基因表达的选择。

获取原文
           

摘要

The p53 tumor suppressor pathway limits oncogenesis by inducing cell cycle arrest or apoptosis. A key p53 target gene is PUMA, which encodes a BH3-only proapoptotic protein. Here we demonstrate that Puma deletion in the Eμ-Myc mouse model of Burkitt lymphoma accelerates lymphomagenesis and that ~75% of Eμ-Myc lymphomas naturally select against Puma protein expression. Furthermore, approximately 40% of primary human Burkitt lymphomas fail to express detectable levels of PUMA and in some tumors this is associated with DNA methylation. Burkitt lymphoma cell lines phenocopy the primary tumors with respect to DNA methylation and diminished PUMA expression, which can be reactivated following inhibition of DNA methyltransferases. These findings establish that PUMA is silenced in human malignancies, and they suggest PUMA as a target for the development of novel chemotherapeutics.
机译:p53肿瘤抑制途径通过诱导细胞周期停滞或凋亡来限制肿瘤发生。 p53的关键靶基因是 PUMA ,它编码仅BH3的促凋亡蛋白。在这里,我们证明了Burkitt淋巴瘤的Eμ- Myc 小鼠模型中的 Puma 缺失会加速淋巴瘤的形成,而Eμ- Myc 淋巴瘤自然地约有75%选择针对Puma蛋白的表达。此外,大约40%的原发性人类伯基特淋巴瘤未能表达可检测水平的 PUMA ,在某些肿瘤中,这与DNA甲基化有关。 Burkitt淋巴瘤细胞系对DNA甲基化和 PUMA 表达减少进行原发性肿瘤表型化,可在抑制DNA甲基转移酶后将其重新激活。这些发现证明 PUMA 在人类恶性肿瘤中是沉默的,并建议 PUMA 作为新型化学疗法发展的目标。

著录项

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