Expression and role of Toll-like receptors on human umbilical cord mesenchymal stromal cells.

Abstract:

BACKGROUND AIMS:Toll-like receptors (TLRs) play an important role in innate and adaptive immunity by recognizing pathogen-associated molecular patterns (PAMPs). METHODS:In the present study, we investigated the expression and role of TLRs on human umbilical cord mesenchymal stromal cells (UC-MSCs). The proliferation, differentiation and immunoregulatory activity of UC-MSCs primed with or without TLR ligands were determined. RESULTS:At the RNA level, the expression of TLR2, 4, 6 and 9 was relatively higher than that of other TLRs. However, TLR3 and TLR4 expression were relatively higher at the protein level. UC-MSCs expressed functional TLRs by nuclear factor-κB activation and cytokine expression assay. Poly-inosinic acid:cytidylic acid [Poly(I:C)] stimulation inhibited the proliferation of UC-MSCs, but the ligand of other TLRs had no significant effect. Poly(I:C) stimulation enhanced the adipogenic differentiation capability of UC-MSCs, but lipopolysaccharide inhibited the adipogenic differentiation. Poly(I:C) and CpG-oligonucleotide promoted the immunosuppressive potentiality of UC-MSCs, accompanied with the phosphorylation of interferon regulatory factor 3 (IRF3) and increased expression of indoleamine 2,3-dioxygenase and interferon β, whereas activation of other TLR ligands (synthetic analog fibroblast-stimulating lipopeptide-1 and lipopolysaccharide) failed to affect the immunoregulatory activity of UC-MSCs. CONCLUSIONS:Taken together, our data demonstrated that TLR activation influenced the function of UC-MSCs, which might have important implications in future efforts to explore the clinical potentials of UC-MSCs.

journal_name

Cytotherapy

journal_title

Cytotherapy

authors

Chen D,Ma F,Xu S,Yang S,Chen F,Rong L,Chi Y,Zhao Q,Lu S,Han Z,Pang A,Han Z

doi

10.1016/j.jcyt.2012.12.001

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

423-33

issue

4

eissn

1465-3249

issn

1477-2566

pii

S1465-3249(12)00084-9

journal_volume

15

pub_type

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