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Pediatr Transplant. 2013 Nov;17(7):676-82. doi: 10.1111/petr.12133. Epub 2013 Aug 6.

Protection against hyperoxia-induced lung fibrosis by KGF-induced MSCs mobilization in neonatal rats.

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  • 1Department of Intensive Care Unit, Children's Hospital of Chongqing Medical University, Chongqing, China; Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Center for Child Development and Disorders, Chongqing Medical University, Chongqing, China.

Abstract

MSCs have been shown to improve functional and pathological outcome in lung fibrosis. However, low in vivo cell engraftment of the transplanted cells limits their overall effectiveness. KGF (also known as FGF-7) is a critical mediator of pulmonary epithelial repair through stimulation of epithelial cell proliferation. However, the role of KGF in MSCs and its therapeutic effects have not been identified. In this study, we investigated the effect of KGF on MSCs and its preventive role in hyperoxia-induced fibrosis in neonatal rats. Neonatal rats exposed to normoxia or hyperoxia were randomly assigned to receive intraperitoneal injections of normal saline (PL), MSCs, or KGF pretreated MSCs on the fourth day of exposure. Our results showed that as compared to PL, while MSCs attenuated lung fibrosis, KGF pretreated MSCs exhibited enhanced preventive effect against lung fibrosis. This effect was partly attributed to enhanced mobilization of MSCs to the fibrotic lungs. In addition, the SHH signaling pathway, which is associated with the differentiation of stem cells was activated by KGF. Our data suggest that MSCs, especially KGF preconditioned MSCs, can attenuate lung fibrosis and KGF may regulate the MSCs behavior by activating SHH pathway.

© 2013 John Wiley & Sons A/S.

KEYWORDS:

KGF; MSC; SHH; hyperoxia; lung fibrosis

PMID:
23919829
[PubMed - indexed for MEDLINE]
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