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Related Concept Videos

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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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...
1.3K
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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Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby stem cells:
3.0K
Overview of Hematopoiesis01:20

Overview of Hematopoiesis

3.7K
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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Related Experiment Video

Updated: May 25, 2025

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
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Helper ILCs in the human hematopoietic system.

Xiaoyu Su1, Zhaoqun Deng2, Yu Lan3

  • 1Laboratory Center, Affiliated People's Hospital of Jiangsu University, Zhenjiang 212013, China.

Trends in Immunology
|February 26, 2025
PubMed
Summary

Helper innate lymphoid cells (ILCs) show tumor-killing abilities and play complex roles in the hematopoietic system. Understanding their origin and interactions is key for developing new cancer immunotherapies.

Keywords:
HSC-independent lymphopoiesishelper ILCshematological malignancieshematopoiesisinnate immunityinnate lymphoid cells

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Area of Science:

  • Immunology
  • Hematology
  • Cancer Biology

Background:

  • Helper innate lymphoid cells (ILCs), including ILC1, ILC2, and ILC3, are crucial for rapid immune responses.
  • ILCs exhibit direct tumor-killing capacities, similar to natural killer (NK) cells.
  • While typically tissue-resident, ILCs are increasingly recognized for their roles in the hematopoietic system.

Purpose of the Study:

  • To review the ontogeny and roles of ILCs within the human and murine hematopoietic systems.
  • To summarize recent findings on ILC embryonic hematopoietic origin.
  • To explore the interactions between ILCs and leukemic cells, and their dual roles in carcinogenesis.

Main Methods:

  • Review of existing literature on innate lymphoid cells.
  • Analysis of ILC ontogeny and hematopoietic origins.
  • Examination of ILC interactions with leukemic and immune cells.

Main Results:

  • ILCs possess direct tumor-killing capabilities.
  • ILCs have significant roles in both physiological and pathological contexts within the hematopoietic system.
  • ILCs can exert dual effects in carcinogenesis, potentially promoting or inhibiting cancer development.

Conclusions:

  • ILCs are emerging as critical players in the hematopoietic system with direct anti-tumor functions.
  • Further research into ILCs' origins and interactions with cancer cells can guide the development of novel immunotherapies for hematological malignancies.