这种lncRNA ELDR通过干扰DNA复制和染色质可访问性来抑制AML的瘤性
Kaifee Arman1, Julie Ross1, Eva-Maria Piskor1,2
1Institut de recherches cliniques de Montréal, McGill University, Montréal, QC, Canada.
Blood advances
|September 8, 2025
概括
这项研究揭示了长非编码RNAELDR通过破坏DNA复制和中心转录来阻碍MLL-rAML的白血病进展. 过度表达ELDR可以提高治疗效果,减少白血病的发展,提供新的治疗途径.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 遗传学 遗传学 是一个
背景情况:
- 具有MLL重组 (MLL-r AML) 的急性髓性白血病 (AML) 是具有攻击性的.
- MLL-AF9融合蛋白驱动白血病细胞扩张,并影响分化.
- 对于MLL-rAML,需要新的治疗点.
研究的目的:
- 研究lncRNAELDR在MLL-rAML中的作用.
- 确定ELDR在白血病发生过程中的作用机制.
- 探索ELDR作为潜在的治疗目标.
主要方法:
- 研究了THP-1细胞中ELDR通过生长因子独立1和LSD1的调节.
- 评估了ELDR过度表达对细胞生长和异种移植白血病发展的影响.
- 分析了ELDR与PCNA和MCM5.5的相互作用.
- 检查了ELDR过度表达的AML细胞中的染色质可访问性和中心转录.
主要成果:
- 在MLL-r AML中,ELDR表达是由GFI1和LSD1规范的.
- 强迫ELDR过度表达增强了LSD1i/ATRA治疗疗效,并在体内减少了白血病负担.
- ELDR结合PCNA和MCM5,影响DNA复制分叉的进展.
- 过度表达ELDR减少了在中心体α卫星重复的染色质可访问性和转录.
- ELDR RNA局部化到中间体,干扰DNA复制和转录.
结论:
- 在MLL-rAML中,ELDR通过影响DNA复制和中间体功能,起到关键作用.
- 过度表达ELDR增强了LSD1抑制剂和ATRA的抗白血病作用.
- 对于MLL-r AML来说,ELDR是一个有前途的治疗标.
更多相关视频
09:16Investigation of the Transcriptional Role of a RUNX1 Intronic Silencer by CRISPR/Cas9 Ribonucleoprotein in Acute Myeloid Leukemia Cells
Published on: September 1, 2019
8.0K
10:44In Vitro Selection of Engineered Transcriptional Repressors for Targeted Epigenetic Silencing
Published on: May 5, 2023
1.9K
相关概念视频
lncRNA - Long Non-coding RNAs
9.8K
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
9.8K
Abnormal Proliferation
5.1K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.1K
MicroRNAs
3.8K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
3.8K
MicroRNAs
23.9K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
23.9K
Loss of Tumor Suppressor Gene Functions
5.9K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
5.9K
Cancer-Critical Genes II: Tumor Suppressor Genes
9.4K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
9.4K
