Functional effects of TGF-ß1 on mesenchymal stem cell mobilization in cockroach allergen-induced asthma.
J Immunol
; 192(10): 4560-4570, 2014 May 15.
Article
em En
| MEDLINE
| ID: mdl-24711618
ABSTRACT
Mesenchymal stem cells (MSCs) have been suggested to participate in immune regulation and airway repair/remodeling. TGF-ß1 is critical in the recruitment of stem/progenitor cells for tissue repair, remodeling, and cell differentiation. In this study, we sought to investigate the role of TGF-ß1 in MSC migration in allergic asthma. We examined nestin expression (a marker for MSCs) and TGF-ß1 signaling activation in airways in cockroach allergen extract (CRE)-induced mouse models. Compared with control mice, there were increased nestin(+) cells in airways and higher levels of active TGF-ß1 in serum and p-Smad2/3 expression in lungs of CRE-treated mice. Increased activation of TGF-ß1 signaling was also found in CRE-treated MSCs. We then assessed MSC migration induced by conditioned medium from CRE-challenged human epithelium in air/liquid interface culture in Transwell assays. MSC migration was stimulated by epithelial-conditioned medium, but was significantly inhibited by either TGF-ß1-neutralizing Ab or TßR1 inhibitor. Intriguingly, increased migration of MSCs from blood and bone marrow to the airway was also observed after systemic injection of GFP(+) MSCs and from bone marrow of Nes-GFP mice following CRE challenge. Furthermore, TGF-ß1-neutralizing Ab inhibited the CRE-induced MSC recruitment, but promoted airway inflammation. Finally, we investigated the role of MSCs in modulating CRE-induced T cell response and found that MSCs significantly inhibited CRE-induced inflammatory cytokine secretion (IL-4, IL-13, IL-17, and IFN-γ) by CD4(+) T cells. These results suggest that TGF-ß1 may be a key promigratory factor in recruiting MSCs to the airways in mouse models of asthma.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Asma
/
Alérgenos
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Movimento Celular
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Baratas
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Fator de Crescimento Transformador beta1
Tipo de estudo:
Prognostic_studies
Limite:
Animals
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Female
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Humans
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Male
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article