Stem Cell Reviews and Reports

, Volume 14, Issue 2, pp 286–293 | Cite as

Involvement of TLR3-Dependent PGES Expression in Immunosuppression by Human Bone Marrow Mesenchymal Stem Cells

  • Dae Seong Kim
  • Whi Hyeong Lee
  • Myoung Woo Lee
  • Hyun Jin Park
  • In Keun Jang
  • Ji Won Lee
  • Ki Woong Sung
  • Hong Hoe Koo
  • Keon Hee Yoo
Article
  • 152 Downloads

Abstract

Human mesenchymal stem cells (MSCs) are known for their prostaglandin E2 (PGE2)-mediated immunosuppressive function but the precise molecular mechanisms underlying PGE2 biosynthesis during inflammation have not been completely elucidated. In this study, we have investigated the involvement of PGE2 pathway members in PGE2 production by bone marrow (BM)-MSCs in response to inflammatory stimuli, and their role in immunosuppression mediated by BM-MSCs. We found that IFN-γ and TNF-α increased cyclooxygenase (COX)-2 expression but not that of prostaglandin E synthase (PGES), or PGE2 production. On the other hand, the toll like receptor 3 (TLR3) stimulant poly(I:C) increased expression of both COX-2 and PGES, resulting in a significant increase in PGE2 levels. This effect was reversed upon COX-2 inhibition with indomethacin or PGES downregulation by siRNA. Reduced PGE2 levels decreased MSC’s capacity to inhibit hPBMC proliferation. In addition, administration of MSCs with inhibited PGES expression into mice with graft-versus-host disease (GVHD) did not reduce mortality. In summary, the present study reveals that upregulation of PGES via TLR3 is critical for BM-MSCs-mediated immunosuppression by PGE2 secretion via the COX-2/PGE2 pathway. These results provide a basis for understanding the molecular mechanisms underlying the PGE2-mediated immunosuppressive properties of MSCs.

Keywords

Mesenchymal stem cell Cyclooxygenase 2 Prostaglandin E synthase Prostaglandin E2 Immunosuppression 

Notes

Acknowledgements

This research was supported by a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI) funded by the Ministry of Health & Welfare, Republic of Korea [Grant number: HI14C3484 and HI15C2963].

Compliance with Ethical Standards

Disclosure statement

The authors report no potential conflicts of interest.

Research involving Human Participants and Animals

The Institutional Review Board (2012-11-003) of the Samsung Medical Center approved this study and all human samples were obtained with informed consent. NOD/SCID mice purchased from the Jackson Laboratories were used in this study, which was approved by the Institutional Animal Care and Use Committee of Samsung Medical Center, certified by AAALAC international (2001).

Supplementary material

12015_2017_9793_MOESM1_ESM.docx (188 kb)
Supplementary material 1 (DOCX 188 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Pediatrics, Samsung Medical CenterSungkyunkwan University School of MedicineSeoulSouth Korea
  2. 2.Stem Cell & Regenerative Medicine InstituteSamsung Medical CenterSeoulSouth Korea
  3. 3.Regeneration Medicine Research Institute, Stemlab Inc. TechnoComplexKorea UniversitySeoulSouth Korea
  4. 4.Biomedical Research InstituteLIFELIVER Co., LTD.YonginSouth Korea
  5. 5.Department of Health Sciences and Technology, SAIHSTSungkyunkwan UniversitySeoulSouth Korea
  6. 6.Department of Medical Device Management and Research, SAIHSTSungkyunkwan UniversitySeoulSouth Korea

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