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相关概念视频

Overview of Hematopoiesis01:20

Overview of Hematopoiesis

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Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
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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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Production of Formed Elements01:34

Production of Formed Elements

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Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
Most HSCs commit to...
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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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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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Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

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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,...
1.4K

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Analyzing the Functions of Mast Cells In Vivo Using 'Mast Cell Knock-in' Mice
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血液形成和乳腺细胞的发展.

Domenico Ribatti1, Antonio d'Amati1

  • 1Department of Translational Biomedicine and Neuroscience, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy.

International journal of molecular sciences
|July 14, 2023
PubMed
概括
此摘要是机器生成的。

造血干细胞 (HSC) 产生所有血液细胞. 这篇综述详细介绍了骨髓中的HSCs如何产生乳腺细胞,追溯其起源从胚胎发育到成年生活.

关键词:
骨髓 骨髓 骨髓 骨髓 骨髓血液形成 血液形成肝脏 肝脏 肝脏 肝脏 肝脏 肝脏巨细胞巨细胞是什么黄体囊中的黄体囊

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Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells
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科学领域:

  • 血液学 血液学 血液学
  • 免疫学 免疫学 免疫学
  • 发育生物学 发展生物学

背景情况:

  • 造血干细胞 (HSC) 对于终身的血细胞生产至关重要.
  • HSCs位于骨髓中,支持血液形成的复杂利基.
  • 乳腺细胞,天生的免疫细胞,具有复杂的发育起源.

研究的目的:

  • 审查瘤细胞的本体发生和来源.
  • 阐明将造血过程与乳腺细胞发育联系起来的机制.
  • 要突出巨细胞从胚胎到成年阶段的多方面的起源.

主要方法:

  • 关于造血干细胞和巨细胞发育研究的文献综述.
  • 分析HSC和免疫细胞前体之间的本体性关系.
  • 综合目前关于巨细胞分化途径的知识.

主要成果:

  • 乳腺细胞起源于胚胎发育早期的黄囊.
  • 胚胎巨细胞种群被最终的HSC衍生的祖先所取代.
  • 成人乳腺细胞在骨髓中通过多个祖先阶段从HSCs发育.

结论:

  • 乳腺细胞的发育是一个复杂的过程,有明显的胚胎和成人阶段.
  • 了解巨细胞的起源是理解先天性免疫细胞发育的关键.
  • 这一综述巩固了关于巨细胞的造血起源的知识.