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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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Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
2.6K
iPS Cell Differentiation01:22

iPS Cell Differentiation

2.7K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Somatic to iPS Cell Reprogramming01:29

Somatic to iPS Cell Reprogramming

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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
2.2K
Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

4.0K
Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell...
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相关实验视频

Updated: Jun 27, 2025

Collection of Serum- and Feeder-free Mouse Embryonic Stem Cell-conditioned Medium for a Cell-free Approach
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Collection of Serum- and Feeder-free Mouse Embryonic Stem Cell-conditioned Medium for a Cell-free Approach

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本杰明·巴顿对干细胞的影响:逆转老龄化免疫力时钟

Luciana Conde1, Carolina Lucas1

  • 1Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA.

Science immunology
|May 3, 2024
PubMed
概括

针对骨髓偏偏血造血干细胞 (my-HSCs) 的抗体疗法使老年免疫系统复苏. 这种方法可以增强老年小鼠的免疫反应.

科学领域:

  • 免疫学 免疫学 免疫学
  • 血液学 血液学 血液学
  • 衰老研究研究 衰老研究

背景情况:

  • 免疫系统功能随着年龄的增长而下降,导致免疫反应的有效性降低.
  • 造血干细胞 (HSC) 显示与年龄相关的变化,包括偏向髓状血统 (my-HSCs).
  • 这种髓状偏差与免疫功能障碍和衰老中的炎症有关.

研究的目的:

  • 在老年小鼠中研究削减my-HSCs的治疗潜力.
  • 为了确定是否准my-HSCs可以使免疫系统复苏.
  • 评估my-HSC枯竭对免疫反应有效性的影响.

主要方法:

  • 在老年小鼠中给药一种特定的抗体,以耗尽my-HSCs.
  • 流细胞计和细胞分类来分析HSC群体和免疫细胞子集.
  • 功能性测试用于评估免疫反应,例如T细胞激活和细胞因子生产.

主要成果:

  • 已经成功地消耗了骨髓偏偏血造血干细胞 (my-HSCs).
  • 在老年小鼠中,my-HSCs的耗尽导致了免疫系统的复苏.
  • 在my-HSC向治疗后,观察到免疫反应的改善.

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Collection of Serum- and Feeder-free Mouse Embryonic Stem Cell-conditioned Medium for a Cell-free Approach
09:32

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结论:

  • 准和消耗my-HSCs是免疫系统在衰老中复苏的可行策略.
  • 这种基于抗体的治疗有望增强老年人的免疫功能.
  • 对my-HSC向疗法的进一步研究可能会导致与年龄相关的免疫衰退的新疗法.