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Related Concept Videos

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

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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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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

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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.
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Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby stem cells:
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Stem Cell Culture01:17

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Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...
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Haematopoietic stem cells: past, present and future.

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Decades of research identified haematopoietic stem cells (HSCs) from bone marrow. Their pluripotency and self-renewal are key for therapies, with ongoing work on manipulation and safety.

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Area of Science:

  • Hematology
  • Stem Cell Biology
  • Immunology

Background:

  • The discovery of haematopoietic stem cells (HSCs) followed research into bone marrow's protective effects against lethal irradiation.
  • Identifying and characterizing HSCs involved functional assays and advanced isolation techniques.

Purpose of the Study:

  • To explore the characteristics of HSCs, including pluripotency and self-renewal.
  • To understand the basis of human allogeneic stem cell therapy and its challenges.
  • To outline future research directions in HSC regulation and manipulation.

Main Methods:

  • Functional assays were employed to identify and analyze HSC populations.
  • Advanced cell isolation techniques were utilized to enrich HSCs.
  • The study reviews existing knowledge and research trends in the field.

Main Results:

  • Key HSC characteristics, pluripotency and self-renewal, were identified.
  • HSCs can be isolated from peripheral blood, bone marrow, and cord blood.
  • Current research focuses on HSC regulators and manipulation methods for therapy.

Conclusions:

  • HSC pluripotency and self-renewal are crucial for stem cell therapy.
  • Overcoming immunological barriers is essential for successful engraftment and minimizing graft-versus-host disease.
  • Future research aims to enhance the scope, potential, and safety of HSC therapies through manipulation and genome editing.