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Assessment of the Immunomodulatory Properties of Human Mesenchymal Stem Cells (MSCs)
06:20

Assessment of the Immunomodulatory Properties of Human Mesenchymal Stem Cells (MSCs)

Published on: December 24, 2015

The negative co-signaling molecule b7-h4 is expressed by human bone marrow-derived mesenchymal stem cells and

Qun Xue1, Xi-Ying Luan, Yan-Zheng Gu

  • 1Clinical Immunology Key Lab of Jiangsu Province, First Affiliated Hospital of Suzhou University, People's Republic of China.

Stem Cells and Development
|October 1, 2009
PubMed

Insights

Human bone marrow-derived mesenchymal stem cells (hBMSCs) suppress T-cell activation via B7-H4. This molecule inhibits T-cell proliferation and offers therapeutic potential for immune-related diseases.

Area of Science:

  • Immunology
  • Cell Biology
  • Stem Cell Research

Background:

  • Human bone marrow-derived mesenchymal stem cells (hBMSCs) exhibit immunosuppressive properties.
  • The exact mechanisms underlying hBMSC-mediated T-cell suppression remain incompletely elucidated.

Purpose of the Study:

  • To investigate the role of the B7-H4 molecule in the immunosuppressive functions of hBMSCs.
  • To elucidate the molecular pathways through which B7-H4 influences T-cell activation and proliferation.

Main Methods:

  • Assessment of B7-H4 expression on hBMSCs using reverse transcription, immunofluorescence staining, and flow cytometry.
  • Evaluation of T-cell activation, proliferation, cell cycle, and NF-kappaB translocation in co-cultures with hBMSCs.
  • Analysis of cytokine secretion (e.g., TGF-beta1) and the impact of B7-H4 blocking antibodies.

Main Results:

  • B7-H4 is abundantly expressed on hBMSCs.
  • B7-H4 on hBMSCs inhibits T-cell activation and proliferation by inducing cell cycle arrest and blocking NF-kappaB nuclear translocation.
  • Blocking B7-H4 reduced TGF-beta1 secretion and attenuated the immunosuppressive effects of hBMSCs on T-cells.

Conclusions:

  • B7-H4 plays a significant role in the immunosuppressive capacity of hBMSCs towards T-cells.
  • These findings support the therapeutic potential of hBMSCs in transplantation, graft-versus-host disease, and autoimmune disorders.

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