Journal
STEM CELLS INTERNATIONAL
Volume 2022, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2022/8661689
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Funding
- National Natural Science Foundation of China [NSFC 81701900, 81571894]
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This study investigated the attenuating effects of hUC-MSCs on severe burn-induced acute lung injury (ALI), which were mediated by the secretion of TSG-6. The study established and evaluated a rat model, measured cytokine expression using ELISA, and assessed inflammatory cell infiltration and lung injury using immunohistochemistry assay.
Objectives. To investigate whether hUC-MSCs attenuated severe burn-induced ALI and the effects were based on TSG-6 secreted from hUC-MSCs. Method. A rat model was established and evaluated as follows: cytokine expression was measured by ELISA, and both inflammatory cell infiltration and lung injury were assessed by immunohistochemistry assay. Results. In vitro, TSG-6 levels in serum from the burn group were significantly increased compared with those from the sham group. In vivo, TSG-6 levels of lung tissues and serum in the burn+hUC-MSC group were significantly increased compared with those in the burn group. Both in lung tissues and in serum, increased levels of proinflammatory cytokines (TNF-alpha, IL-1 beta, and IL-6) were remarkably decreased, but the anti-inflammatory cytokine IL-10 increased after hUC-MSC administration (p < 0.05). These significant positive effects after hUC-MSC transplantation did not occur in the burn+siTSG-6 group. Conclusion. The intratracheal implantation of hUC-MSCs has been an effective treatment for severe burn-induced ALI via promoting TSG-6 secretion and inhibiting inflammatory reaction in lung tissue.
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