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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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Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

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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
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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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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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Stem Cell Culture01:17

Stem Cell Culture

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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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A Culture Method to Maintain Quiescent Human Hematopoietic Stem Cells
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A Culture Method to Maintain Quiescent Human Hematopoietic Stem Cells

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Avoid shocking your hematopoietic stem cells to keep them young and growing.

Maria-Eleni Lalioti1, Jasmin Rettkowski1, Nina Cabezas-Wallscheid2

  • 1Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany.

Cell Stem Cell
|November 5, 2021
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Summary

Maintaining hematopoietic stem cell (HSC) fitness ex vivo is difficult. Researchers identified heat shock factor 1 (Hsf1) as a key target for preserving HSC health in culture and during aging.

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Area of Science:

  • Stem cell biology
  • Molecular biology
  • Aging research

Background:

  • Expanding hematopoietic stem cells (HSCs) ex vivo is crucial for transplantation but remains a significant challenge.
  • Maintaining HSC fitness and function during culture and aging is critical for therapeutic applications.

Purpose of the Study:

  • To identify novel targets for maintaining HSC fitness and protein homeostasis ex vivo.
  • To investigate the role of heat shock factor 1 (Hsf1) in HSC maintenance.

Main Methods:

  • The study by Kruta et al. (2021) focused on identifying molecular targets involved in HSC maintenance.
  • Investigated the function of heat shock factor 1 (Hsf1) in HSCs under culture and aging conditions.

Main Results:

  • Heat shock factor 1 (Hsf1) was identified as a critical factor for maintaining HSC fitness.
  • Hsf1 plays a role in preserving protein homeostasis within HSCs.
  • The findings are relevant for both in vitro culture conditions and in vivo aging processes.

Conclusions:

  • Targeting Hsf1 presents a promising strategy for improving HSC expansion ex vivo.
  • Maintaining HSC protein homeostasis via Hsf1 is essential for their long-term fitness, particularly during aging.