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2007 ; 13
(4-5
): 217-26
Nephropedia Template TP
gab.com Text
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English Wikipedia
Identification of IL-10 and TGF-beta transcripts involved in the inhibition of
T-lymphocyte proliferation during cell contact with human mesenchymal stem cells
#MMPMID17605296
Nasef A
; Chapel A
; Mazurier C
; Bouchet S
; Lopez M
; Mathieu N
; Sensebé L
; Zhang Y
; Gorin NC
; Thierry D
; Fouillard L
Gene Expr
2007[]; 13
(4-5
): 217-26
PMID17605296
show ga
Mesenchymal stem cells (MSC) inhibit the response of allogeneic T lymphocytes in
culture. Because the mechanisms of this effect may differ according to the
existence of cell contact, we investigated the differences in gene expression of
inhibitory molecules during MSC-T lymphocyte coculture when cell contact does and
does not occur. Human MSC and T lymphocytes were cultured together in standard
and transwell cultures. MSC gene expression was analyzed by semiquantitative
real-time RT-PCR. MSC elicited a high dose-dependent inhibition of T lymphocytes
in cultures with cell contact, but inhibition occurred even without cell contact.
In both cases, we observed significant upregulation of IDO, LIF, and HLA-G, along
with downregulation of HGF and SDF1. In cultures with cell contact, IL-10 and
TGF-beta transcripts were expressed in a significantly higher level than in
cultures without this contact. Furthermore, in the latter, the increased
inhibition of T-cell proliferation was positively correlated with IDO gene
expression and negatively correlated with SDF1 gene expression. MSC appear to
induce T-cell tolerance by two distinct mechanisms. The first of these, which
does not require cell contact, induces expression of the tolerogenic genes IDO,
LIF, and HLA-G. The second mechanism, which is contact dependent, modulates IL-10
and TGF-beta gene expression. These two mechanisms probably play separate roles
in MSC-induced tolerance in allogeneic hematopoietic stem cell transplantation.