Evi1控制着Kdm6b介导的组素去甲基化,以调节血造原生细胞中Laptm4b驱动的mTOR通路
Qiong Wu1,2, Chunjie Yu2, Fang Yu2
1Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China.
The Journal of clinical investigation
|December 16, 2024
概括
在小鼠中,异型病毒整合部位1 (EVI1) 过度表达会通过扩大髓状原始体和通过KDM6B/H3K27me3/LAPTM4B通路抑制淋巴发育,导致MDS/MPN类疾病.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 异形病毒整合部位1 (EVI1/MECOM) 在髓状瘤中经常被上调.
- 了解EVI1在血液形成中的作用及其对髓状细胞癌的贡献至关重要.
研究的目的:
- 建立一个小鼠模型来研究EVI1驱动的骨髓瘤恶性瘤.
- 阐明EVI1对这些疾病的贡献的分子机制.
主要方法:
- 在造血干细胞/原始细胞 (HSPC) 中生成一种可诱导的Evi1-转基因小鼠模型.
- 分析了血液形成,基因表达和Evi1结合部位.
- 研究了KDM6B,H3K27me3,LAPTM4B和mTOR信号传递的作用.
主要成果:
- 在小鼠中诱导Evi1导致贫血,血小板缩,淋巴缩和MDS/MPN类疾病.
- Evi1上调了Kdm6b,该基因去甲基化了H3K27me3,激活了Laptm4b等基因.
- 在EVI1 / KDM6B / H3K27me3 / LAPTM4B途径和LAPTM4B驱动的mTOR过活化在EVI1hi白血病细胞中至关重要.
结论:
- 这项研究建立了针对EVI1hi髓状瘤的相关小鼠模型.
- 证明了EVI1介导的KDM6B/H3K27me3/LAPTM4B信号轴在疾病维持中的重要性.
- 突出了LAPTM4B驱动的mTOR途径在EVI1hi白血病细胞生长中的作用.
相关概念视频
PI3K/mTOR/AKT Signaling Pathway
3.4K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.4K
mTOR Signaling and Cancer Progression
3.7K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.7K
Histone Modification
13.0K
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
13.0K
Spreading of Chromatin Modifications
8.2K
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
Writers
The writer...
8.2K
Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
Regulation of Hematopoietic Stem Cells
3.1K
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
3.1K


