造血干细胞分裂是由不同的RUNX1结合伙伴控制的
bioRxiv : the preprint server for biology
|June 19, 2024
概括
发现一种新药物Ro5-3335通过向RUNX1转录复合体,增加了造血干细胞 (HSC) 分裂并增强了克隆多样性. 这一发现为通过增加干细胞数量来治疗血液疾病提供了潜在的新策略.
科学领域:
- 血液学 血液学 血液学
- 干细胞生物学 干细胞生物学
- 分子生物学分子生物学
背景情况:
- 造血干细胞 (HSC) 的自我更新和分化维持了终身的血液生产.
- 包括RUNX1在内的转录因子网络调节HSC命运和克隆多样性.
- RUNX1突变可以减少造血干细胞的克隆多样性.
研究的目的:
- 为了识别RUNX1和HSC扩张的调节器.
- 为了阐明RUNX1抑制剂Ro5-3335.5的机制.
- 调查干细胞克隆多样性的药理增强的潜力.
主要方法:
- 在斑马鱼中进行化学查,以确定HSC扩张调节器.
- 在斑马鱼中进行移植测定,以评估嵌合性.
- 使用人类CD34+细胞分析Ro5-3335对RUNX1转录复合体的影响的研究.
主要成果:
- 罗5-3335在斑马鱼中增加了HSC划分,导致移植后增加了嵌合体.
- 罗5-3335通过结合ELF1,独立于CBFý来重塑RUNX1转录复合体.
- 这种相互作用促进细胞周期基因的表达,增强HSC自我更新,防止分化.
结论:
- 罗5-3335在药理上增加了体内干细胞克隆的数量,证明了增强克隆多样性的新机制.
- RUNX1结合伙伴,特别是ELF转录因子,在引导细胞分裂和确定细胞命运方面发挥着关键作用.
- 这项研究为开发治疗方法开辟了道路,以增强各种血液疾病的克隆多样性.
更多相关视频
09:32Clonal Analysis of Embryonic Hematopoietic Stem Cell Precursors Using Single Cell Index Sorting Combined with Endothelial Cell Niche Co-culture
Published on: May 8, 2018
8.6K
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
7.5K
相关概念视频
Lineage Commitment
3.0K
Commitment is the process whereby stem cells:
3.0K
Regulation of Hematopoietic Stem Cells
3.2K
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...
3.2K
Multipotency of Hematopoietic Stem Cells
3.1K
The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
3.1K
Hematopoiesis
5.2K
The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
5.2K
Regulation of Angiogenesis and Blood Supply
2.5K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.5K
General Transcription Factors
5.2K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
5.2K
