过度表达P-选择素会通过炎症受体介导的增殖和分化损害造血干细胞恒常性
Wei He1, Huandi Qiu2, Yunyu Feng1
1State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.
Cell death & disease
|October 21, 2025
概括
皮选择素 (SELP) 通过促进炎症和基因组不稳定性,驱动血造干细胞 (HSC) 的衰老和衰竭. 向P-选择素可能会恢复HSC功能,并对抗白血病干细胞.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 衰老研究研究 衰老研究
- 分子生物学分子生物学
背景情况:
- 造血干细胞 (HSC) 维持终身血液和免疫系统的恒常性.
- 衰老和炎症显著影响HSC功能和造血能力.
研究的目的:
- 研究P-选择素 (SELP) 在老化和炎症性压力期间调节HSC功能中的作用.
- 阐明SELP影响HSCs的分子机制,并探索治疗潜力.
主要方法:
- 在老年和炎症的高血压细胞中分析SELP表达.
- 生成特定组织的SELP过度表达模型.
- 单细胞转录组学. 单细胞转录组学.
- 涉及蛋白质与蛋白质相互作用 (P-selectin和IFNγR1) 的机制研究.
主要成果:
- 在老年和炎症性HSC中SELP上调导致过度增殖,分化和自我更新的丧失.
- 慢性SELP升高会破坏HSC极性,增加氧化应激,并诱导基因组不稳定性,导致HSC枯竭.
- 通过直接与IFNγR1.1相互作用,SELP激活IFN-γ和PI3K-AKT-mTOR信号通路.
- 过度表达SELP会抑制白血病干细胞 (LSC) 的活性.
结论:
- P-选择素是一个关键的调节器,将慢性炎症和衰老与造血细胞衰退联系起来.
- 向P-selectin为与年龄相关的造血功能障碍和血液恶性瘤提供了双重治疗策略.
更多相关视频
相关概念视频
Selectins
4.1K
Cell adhesion is an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain,...
4.1K
Regulation of Hematopoietic Stem Cells
3.9K
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...
3.9K
Multipotency of Hematopoietic Stem Cells
3.8K
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...
3.8K
Role of Hematopoietic Growth Factors
3.1K
Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Thrombopoietin (TPO), mainly released by the liver,...
3.1K
Intracellular Signaling Affects Focal Adhesions
3.5K
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
3.5K
Lineage Commitment
4.1K
Commitment is the process whereby stem cells:
4.1K


