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Related Concept Videos

Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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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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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
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Stem Cell Therapy for Tissue Regeneration01:21

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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.
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Related Experiment Video

Updated: Dec 8, 2025

Analyzing the Effects of Stromal Cells on the Recruitment of Leukocytes from Flow
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Modulating endothelial adhesion and migration impacts stem cell therapies efficacy.

Richard Schäfer1, Matthias Schwab2, Georg Siegel3

  • 1Institute for Transfusion Medicine and Immunohematology, German Red Cross Blood Donor Service Baden-Württemberg-Hessen gGmbH, Goethe-University Hospital, Frankfurt am Main, Germany; Institute of Clinical and Experimental Transfusion Medicine, University Hospital Tübingen, Tübingen, Germany.

Ebiomedicine
|September 17, 2020
PubMed
Summary
This summary is machine-generated.

Modifying Mesenchymal Stem Cells (MSC) with polyethylenimine (PEI) enhances their homing to injured brain tissue and improves therapeutic efficacy in stroke models. This stem cell therapy approach shows promise for neurological conditions.

Keywords:
AdhesionGliomaHomingMigrationStem cellsStroke

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Area of Science:

  • Regenerative Medicine
  • Stem Cell Biology
  • Nanomedicine

Background:

  • Understanding stem cell therapy mechanisms is crucial for clinical application.
  • Stem cell interactions with host vasculature and their impact on efficacy require elucidation.

Purpose of the Study:

  • To investigate if adhesion and chemokine receptors on stem cells can be functionally modulated.
  • To determine if such modulation affects stem cell interactions with host endothelium for therapeutic benefit.

Main Methods:

  • Human bone marrow-derived Mesenchymal Stem Cells (MSC) were treated with polyethylenimine (PEI).
  • Effects on MSC adhesion and chemokine receptors were analyzed in vitro.
  • Homing and therapeutic efficacy of PEI-modified MSC were evaluated in rodent models of CNS pathologies.

Main Results:

  • PEI treatment enhanced CCR4 expression and blocked adhesion receptors on MSC, reducing in vitro adhesion.
  • PEI-MSC showed increased homing to the brain in a rat brain injury model, with reduced lung adhesion.
  • PEI-MSC demonstrated enhanced tumor-directed migration and superior therapeutic efficacy in stroke and glioblastoma models.

Conclusions:

  • Modulating stem cell adhesion and migration properties is key to enhancing therapeutic efficacy.
  • Targeted vascular interactions and local microenvironment influence stem cell therapy outcomes.