[Experimental study of T lymphocyte reactivity inhibited by allogeneic bone marrow mesenchymal stem cells].

Abstract

OBJECTIVE:

To address the question whether bone marrow mesenchymal stem cells (MSCs) could lower responsiveness of allogeneic T lymphocytes against alloantigens, and explore a feasible strategy for prevention of graft versus host disease (GVHD) occurred in allogeneic bone marrow transplantation.

METHODS:

T cells were co-cultured with (60)Co-irradiated bone marrow MSCs from different individuals. The proliferative activity of T cells and their reactivity to allogeneic cells and ConA were evaluated with (3)H-TdR incorporation assay.

RESULTS:

T cells could not be activated upon primary or even secondary exposure to allogeneic MSCs (compared the CPM value of 27,529 +/- 969 of T cell alone with that of primary and secondary exposures to allogeneic MSCs were 9,126 +/- 654 and 13,260 +/- 874, respectively). When MSCs were induced to express HLA-DR, they still could not elicit T cell activation. The proliferation rate of allogenous T cells exposed to MSCs was dramatically declined when T cells from the same donor's MSCs were used as stimulator (CPM value decreased from 45,876 +/- 5285 before coculture to 9850 +/- 1618 after coculture). Furthermore, the results remained unchanged even ConA was added into the culture system.

CONCLUSIONS:

Heterogenetic MSCs could suppress T cell activation. MSCs pretreatment might be useful in the prevention of GVHD in HLA-mismatched bone marrow transplantation.

• Authors: Jian-lin Chen, Kai Feng, Zi-Kuan Guo, Ren-na U, Chen Xu, Yu-hang Li, Xiao-dan Liu, Ning Mao, Hu Chen
• Journal: Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi (Zhonghua Xue Ye Xue Za Zhi) Vol. 26 Issue 12 Pg. 740-2 (Dec 2005) ISSN: 0253-2727 [Print] China
• PMID: 16620579 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Bone Marrow Cells (immunology)
• Cell Communication (immunology)
• Cell Proliferation
• Cells, Cultured
• Coculture Techniques
• Graft vs Host Disease (immunology, prevention & control)
• Humans
• Lymphocyte Activation
• Mesenchymal Stem Cells (immunology)
• T-Lymphocytes (immunology)