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Related Experiment Videos

Human mesenchymal stem cells modulate B-cell functions.

Anna Corcione1, Federica Benvenuto, Elisa Ferretti

  • 1Laboratory of Oncology, G. Gaslini Institute, Largo G. Gaslini 5, 16148 Genova, Italy. annacorcione@ospedale-gaslini.ge.it

Blood
|September 6, 2005
PubMed
Summary
This summary is machine-generated.

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Human mesenchymal stem cells (hMSCs) inhibit B-cell proliferation and differentiation, offering potential for treating autoimmune diseases involving B cells. These effects are mediated by soluble factors and impact B-cell homing.

Area of Science:

  • Immunology
  • Cell Biology
  • Regenerative Medicine

Background:

  • Human mesenchymal stem cells (hMSCs) are known to modulate T-cell and dendritic-cell functions.
  • hMSCs are a potential cell therapy for autoimmune diseases.
  • The impact of hMSCs on B cells remains largely uncharacterized.

Purpose of the Study:

  • To investigate the effects of hMSCs on human B-cell function.
  • To elucidate the mechanisms by which hMSCs influence B cells.
  • To assess the potential of hMSCs in treating B-cell-mediated autoimmune disorders.

Main Methods:

  • Co-culture of bone marrow-derived hMSCs with peripheral blood B cells from healthy donors.
  • Stimulation of B cells with B-cell tropic agents.
  • Analysis of B-cell proliferation, cell cycle, apoptosis, differentiation, and surface marker expression.

Related Experiment Videos

  • Assessment of B-cell cytokine production and chemotaxis via transwell assays.

    • Main Results:

    • hMSCs significantly inhibited B-cell proliferation by arresting the cell cycle at the G0/G1 phase, without inducing apoptosis.
    • hMSCs suppressed B-cell differentiation, impairing the production of IgM, IgG, and IgA.
    • hMSCs reduced the expression of CXCR4, CXCR5, and CCR7 on B cells, affecting their chemotactic responses to CXCL12 and CXCL13.
    • hMSCs did not affect B-cell costimulatory molecule expression or cytokine production.

    Conclusions:

    • hMSCs exert potent inhibitory effects on B-cell proliferation and differentiation.
    • Soluble factors secreted by hMSCs are major mediators of B-cell suppression.
    • hMSCs modulate B-cell homing properties by down-regulating chemokine receptor expression.
    • These findings support the therapeutic potential of hMSCs for immune-mediated disorders where B cells play a significant role.