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相关概念视频

Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

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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...
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Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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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...
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Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby stem cells:
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Hematopoiesis01:21

Hematopoiesis

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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...
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相关实验视频

Updated: Jul 2, 2025

Pan-myeloid Differentiation of Human Cord Blood Derived CD34+ Hematopoietic Stem and Progenitor Cells
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CD38促进了造血干细胞休眠的作用.

Liliia Ibneeva1, Sumeet Pal Singh2, Anupam Sinha1

  • 1Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.

PLoS biology
|February 29, 2024
PubMed
概括
此摘要是机器生成的。

科学家们确定CD38是休眠造血干细胞 (HSC) 的标记物. 一条涉及CD38,cADPR,Ca2+,c-Fos和p57Kip2的途径保持了HSC休眠状态,提供了潜在的治疗点.

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Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
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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:

  • 休眠的造血干细胞 (HSC) 对于终身的血液生产至关重要,但维持其静止的机制尚不清楚.
  • 过度的HSC休眠可能会损害对压力的反应,而不足的休眠会导致疲劳.

研究的目的:

  • 确定新型标记物和调节休眠HSC的分子机制.
  • 阐明CD38在维持高细胞休眠中的作用.

主要方法:

  • 用CD38作为表面标记物丰富小鼠休眠的HSC.
  • 研究了循环腺二酸盐核糖 (cADPR) 和 (Ca2+) 释放的作用.
  • 分析了转录因子c-Fos和细胞循环抑制剂p57Kip2.2.的表达.

主要成果:

  • CD38被确定为一种丰富休眠HSC的标记物.
  • CD38/cADPR通路通过从内质网膜 (ER) 释放Ca2+来调节c-Fos表达.
  • c-Fos诱导p57Kip2,驱动HSC休眠;邻近细胞上的CD38活性也促进人类HSC静止.

结论:

  • CD38/cADPR/Ca2+/c-Fos/p57Kip2轴是HSC休眠的一个关键调节器.
  • 准这种途径可能为干细胞移植和血液再生提供新的策略.