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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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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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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 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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Development of Stem Cell-derived Antigen-specific Regulatory T Cells Against Autoimmunity
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Mesenchymal stromal cells and autoimmunity.

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Mesenchymal stromal cells (MSCs) show promise for autoimmune disease therapy by regulating immune responses. MSC-derived extracellular vesicles (EVs) effectively mimic MSC therapeutic effects, offering a potential cell-free treatment strategy.

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Area of Science:

  • Immunology
  • Regenerative Medicine
  • Cell Biology

Background:

  • Mesenchymal stromal cells (MSCs) possess immunomodulatory properties beneficial for autoimmune diseases.
  • MSCs can differentiate into multiple cell types and reside in various organs.
  • The immunomodulatory function of MSCs can be influenced by their microenvironment, potentially leading to immunostimulatory effects.

Purpose of the Study:

  • To review the therapeutic potential of MSCs for autoimmune diseases.
  • To investigate the mechanisms underlying MSC efficacy and challenges in clinical application.
  • To explore the role of MSC-derived extracellular vesicles (EVs) as a cell-free therapeutic alternative.

Main Methods:

  • Review of pre-clinical animal models for autoimmune diseases (e.g., Crohn's disease, multiple sclerosis, graft-versus-host disease, systemic lupus erythematosus, rheumatoid arthritis).
  • Analysis of clinical trial data on MSC therapy for autoimmune conditions.
  • Investigation into the therapeutic activity of MSC-derived extracellular vesicles (EVs) in pre-clinical models.

Main Results:

  • Pre-clinical studies show encouraging results in some autoimmune models but are heterogeneous in others.
  • Clinical trial outcomes are largely preliminary, with topical MSC administration in Crohn's disease showing efficacy.
  • MSC-derived EVs demonstrate therapeutic potential comparable to MSCs in pre-clinical settings.

Conclusions:

  • MSC therapy holds potential for autoimmune diseases, but further research is needed to optimize cell sources, expansion, and administration.
  • MSC-derived EVs represent a promising cell-free therapeutic strategy that warrants further clinical investigation.
  • Understanding MSC plasticity and mechanisms of action is crucial for successful cell-based therapies.