相关实验视频

Updated: Sep 12, 2025

Pooled shRNA Library Screening to Identify Factors that Modulate a Drug Resistance Phenotype

Pooled shRNA Library Screening to Identify Factors that Modulate a Drug Resistance Phenotype

Published on: June 17, 2022

通过线粒体功能障碍引起的RMRP诱导的化学抵抗在复发性和耐火性急性髓性白血病中

Yijing Zhao¹, Hanfei Guo^2,3, Yalan Zhou¹

¹Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Peking University People's Hospital, Beijing, China.

Cancer research and treatment

|August 8, 2025

概括

线粒体RNA处理核核糖酶 (RMRP) 的RNA成分在复发性/耐药性急性髓性白血病 (R/R AML) 中过度表达. 沉默RMRP通过恢复线粒体功能来对抗化疗抵抗.

科学领域:

分子生物学分子生物学
癌症生物学癌症生物学
线粒体生物学线粒体生物学

背景情况:

复发性和耐药性急性髓性白血病 (R/RAML) 由于固有的化疗耐药性, presents一个重要的临床挑战.
线粒体功能障碍越来越被认为是AML中化学抵抗的关键因素.
线粒体RNA处理核核糖酶 (RMRP) 的RNA成分在R/RAML病原和化学抵抗中的特定作用仍然在很大程度上未被阐明.

研究的目的:

调查RMRP在R/RAML中的化疗耐药性背景下的作用.
确定RMRP对线粒体功能和AML骨髓微环境内的转移的影响.

主要方法:

利用质谱测量来识别与AML中化学抵抗相关的分子.
通过检查它对AML模型中的线粒体转移的影响来评估RMRP的作用.
采用传输电子显微镜和西部涂抹来分析RMRP敲击AML细胞中的线粒体功能和自性.

主要成果:

发现RMRP在R/RAML中过度表达,其沉默使AML细胞对化疗敏感.
减少RMRP导致线粒体呼吸能力下降,mtDNA复制数和线粒体基因转录.
进一步的分析显示了改变的线粒体标记,减少线粒体甲基化和RMRP-TERT复合体的形成,表明在转录后调节中的作用.

结论:

高RMRP表达与R/RAML中的线粒体功能障碍和化疗耐药性显著相关.
这些发现为化学抵抗机制提供了新的见解.
准RMRP是一个潜在的治疗策略,可以克服R/RAML的耐药性.

关键词:

急性骨髓性白血病 (AML) 是一种急性骨髓性白血病.化学疗法耐药性抗化学疗法耐药性线粒体中的线粒体.线粒体RNA的RNA组成部分处理核糖核酶.

更多相关视频

Flow Cytometric Analysis of Mitochondrial Reactive Oxygen Species in Murine Hematopoietic Stem and Progenitor Cells and MLL-AF9 Driven Leukemia

Flow Cytometric Analysis of Mitochondrial Reactive Oxygen Species in Murine Hematopoietic Stem and Progenitor Cells and MLL-AF9 Driven Leukemia

Published on: September 5, 2019

Intracellular Phosphoflow Cytometry of Acute Myeloid Leukemia Patient-Derived Xenotransplants

Intracellular Phosphoflow Cytometry of Acute Myeloid Leukemia Patient-Derived Xenotransplants

Published on: June 6, 2025

相关概念视频

Electron Transport Chain: Complex I and II

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...

Treatment Resistant Cancers

Treatment Resistant Cancers

Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...