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Related Concept Videos

Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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...
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

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...
Hematopoiesis01:21

Hematopoiesis

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...
Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

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 types that...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...

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Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells
06:41

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Published on: May 19, 2023

Immunoaging induced by hematopoietic stem cell aging.

Jianwei Wang1, Hartmut Geiger, K Lenhard Rudolph

  • 1Institute of Molecular Medicine and Max-Planck-Research, Department on Stem Cell Aging, Ulm University, Germany.

Current Opinion in Immunology
|August 30, 2011
PubMed
Summary
This summary is machine-generated.

Aging impairs hematopoietic stem cell (HSC) function, reducing lymphoid cell production and increasing myeloid disorders. DNA damage accumulation may cause the loss of HSCs vital for lymphopoiesis and immune health.

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Published on: December 8, 2023

Area of Science:

  • Hematology
  • Immunology
  • Aging Research

Background:

  • Hematopoietic stem cells (HSCs) are crucial for generating all blood lineages and self-renewal.
  • HSC function declines with age, leading to impaired lymphopoiesis and increased myelopoiesis.
  • These age-related changes are linked to higher risks of myeloproliferative diseases and immune dysfunction.

Purpose of the Study:

  • To investigate the mechanisms behind age-related decline in HSC function, specifically lymphopoiesis.
  • To explore the role of DNA damage in the loss of HSC subpopulations responsible for lymphoid differentiation.

Main Methods:

  • The study likely involves analyzing HSC populations in aged versus young models.
  • Investigating markers associated with lymphoid differentiation capacity.
  • Assessing DNA damage levels within HSC subpopulations.

Main Results:

  • A specific subpopulation of HSCs with high lymphoid differentiation capacity is lost during aging.
  • This loss correlates with age-related impairments in lymphopoiesis and immune function.
  • Accumulation of DNA damage is hypothesized to be the cause of this HSC subpopulation loss.

Conclusions:

  • Age-related DNA damage may lead to the depletion of HSCs essential for lymphopoiesis.
  • This depletion contributes to impaired immune function and increased susceptibility to myeloid disorders in aging individuals.
  • Targeting DNA damage pathways could potentially restore HSC function and improve immune health in aging.