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相关概念视频

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,...
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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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Differentiation of Common Myeloid Progenitor Cells01:15

Differentiation of Common Myeloid Progenitor Cells

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Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
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Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

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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...
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Molecular Factors Affecting Cell Division01:27

Molecular Factors Affecting Cell Division

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Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
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Factors Affecting Erythropoiesis01:24

Factors Affecting Erythropoiesis

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The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
EPO then...
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世界结核病增长因素:ASCO指南更新

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概括

血液形成殖民地刺激因子 (CSF) 建议癌症患者在化疗风险高时预防发烧性中性质衰竭. 此外,CSF还有助于干细胞动员,并更新了关于其使用和选择的指导方针.

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科学领域:

  • 在瘤学瘤学.
  • 血液学 血液学 血液学
  • 支持性护理是一种支持性护理.

背景情况:

  • 中性衰竭事件和发烧性中性衰竭是接受化疗的癌症患者的重大风险.
  • 造血殖民地刺激因子 (CSF) 在管理这些风险和干细胞动员中至关重要.

研究的目的:

  • 提供美国临床瘤学会 (ASCO) 关于在成人癌症患者中使用CSF的最新指南.
  • 纳入关于CSF,生物类似药和相关药物的新证据,用于预防中性质衰竭和干细胞调动.

主要方法:

  • 进行了随机对照试验 (RCT),元分析和系统审查的系统审查.
  • 文献搜索涵盖了PubMed和Cochrane图书馆的文章,这些文章于2014年9月1日至2025年8月22日之间发表.
  • 一个ASCO专家小组审查了证据,制定了最新的建议.

主要成果:

  • 该审查包括33项RCT和16项系统性审查.
  • 新的CSF,额外的生物类似药和干细胞调动的CXCR4抑制剂被确定为证据库的补充.
  • 有证据支持使用CSF用于发烧性中性质的特定风险值和干细胞调动.

结论:

  • 预防性CSF推用于化疗,发烧性中性质的风险大约为20%或更高.
  • 如果患者具有高风险特征,可能需要进行首要的CSF预防治疗,以低于20%的风险进行化疗.
  • 单独或与CXCR4抑制剂结合,CSF对干细胞动员是有效的;提供了有关剂量和选择的最新指导.