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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...
3.6K
Hematopoiesis01:21

Hematopoiesis

7.8K
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...
7.8K
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

3.6K
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...
3.6K
Stem Cell Niche01:26

Stem Cell Niche

5.8K
The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
5.8K
Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

2.7K
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,...
2.7K
Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

4.4K
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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Video Experimental Relacionado

Updated: Nov 24, 2025

Combining Intravital Fluorescent Microscopy IVFM with Genetic Models to Study Engraftment Dynamics of Hematopoietic Cells to Bone Marrow Niches
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Combining Intravital Fluorescent Microscopy IVFM with Genetic Models to Study Engraftment Dynamics of Hematopoietic Cells to Bone Marrow Niches

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Los nervios nociceptivos regulan la movilización de las células madre hematopoyéticas

Xin Gao1,2, Dachuan Zhang1,2, Chunliang Xu1,2

  • 1Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, New York, NY, USA.

Nature
|December 28, 2020
PubMed
Resumen

Los nervios nociceptivos, no solo los simpáticos, son cruciales para la movilización de las células madre hematopoyéticas (HSC). Estos nervios liberan el péptido relacionado con el gen de la calcitonina (CGRP), promoviendo directamente que las HSC salgan de la médula ósea.

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Área de la Ciencia:

  • Hematología
  • La neurociencia
  • Biología de las células madre

Sus antecedentes:

  • Las células madre hematopoyéticas (HSC) residen en nichos especializados de la médula ósea.
  • Los nervios simpáticos influyen en los nichos HSC, pero el papel de las neuronas nociceptivas es desconocido.

Objetivo del estudio:

  • Investigar el papel de las neuronas nociceptivas en la movilización y el mantenimiento de HSC dentro del nicho de la médula ósea.

Principales métodos:

  • Investigó la movilización de HSC en respuesta a la actividad nerviosa nociceptiva.
  • Analizaron los mecanismos moleculares de la salida de HSC impulsados por factores derivados de los nociceptores.
  • Se examinaron los efectos directos del CGRP en las HSC.

Principales resultados:

  • Los nervios nociceptivos son esenciales para la movilización forzada de HSC, colaborando con los nervios simpáticos.
  • Los nociceptores impulsan la movilización de HSC inducida por G-CSF a través de la secreción de CGRP.
  • CGRP actúa directamente sobre las HSC a través de RAMP1 y CALCRL, promoviendo la salida a través de la vía Gαs/adeniliciclase/cAMP.
  • La ingestión de capsaicina mejoró la movilización de HSC en ratones.

Conclusiones:

  • Las neuronas nociceptivas juegan un papel crítico en la movilización de HSC.
  • Dirigirse al sistema nervioso nociceptivo puede mejorar el rendimiento de HSC para aplicaciones terapéuticas.