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MSCs relieve lung injury of COPD mice through promoting proliferation of endogenous lung stem cells

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Abstract

Bone marrow mesenchymal stem cells (MSCs) transplantation could repair injury tissue, but no study confirms whether MSCs can promote the proliferation of endogenous lung stem cells to repair alveolar epithelial cells of mice with chronic obstructive pulmonary disease (COPD). This study was designed to investigate the effect of MSCs on the proliferation of endogenous lung stem cells in COPD mice to confirm the repair mechanism of MSCs. The mice were divided into control group, COPD group, and COPD+MSCs group. The following indexes were detected: HE staining of lung tissue, the mean linear intercept (MLI) and alveolar destructive index (DI), the total cell number in bronchoalveolar lavage fluid (BALF), pulmonary function, alveolar wall apoptosis index (AI) and proliferation index (PI), the number of CD45-/CD31-/Sca-1+ cells by flow cytometry (FCM), and the number of bronchoalveolar stem cells (BASCs) in bronchoalveolar duct junction (BADJ) by immunofluorescence. As compared with control group, the number of inflammatory cells in lung tissue was increased, alveolar septa was destroyed and the emphysema-like changes were seen, and the changes of lung function were in line with COPD in COPD group; AI of alveolar wall was significantly increased and PI significantly decreased in COPD group. There was no significant difference in the number of CD45-/CD31-/Sca-1+ cells and BASCs between control group and COPD group. As compared with COPD group, the number of inflammatory cells in BALF was decreased, the number of CD45-/CD31-/Sca-1+ cells and BASCs was increased, AI of alveolar wall was decreased and PI was increased, and emphysema-like changes were relieved in COPD+MSCs group. These findings suggested that MSCs transplantation can relieve lung injury by promoting proliferation of endogenous lung stem cells in the cigarette smoke-induced COPD mice.

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Authors and Affiliations

  1. Department of Respiratory Medicine, Henan Province People’s Hospital, Zhengzhou, 450003, China

    Hong-mei Liu  (刘红梅), Li-jun Ma  (马利军), Ji-zhen Wu  (吴纪珍) & Yu-guang Li  (李玉光)

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  1. Hong-mei Liu  (刘红梅)
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  2. Li-jun Ma  (马利军)
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  3. Ji-zhen Wu  (吴纪珍)
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  4. Yu-guang Li  (李玉光)
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Correspondence to Hong-mei Liu  (刘红梅).

Additional information

This project was supported by a program of Medical Research of Henan Province (No. 102300410247).

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Liu, Hm., Ma, Lj., Wu, Jz. et al. MSCs relieve lung injury of COPD mice through promoting proliferation of endogenous lung stem cells. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 35, 828–833 (2015). https://doi.org/10.1007/s11596-015-1514-2

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  • DOI: https://doi.org/10.1007/s11596-015-1514-2

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