Pretreatment of placental mesenchymal stem cells to prevent bronchiolitis in mice
10.3969/j.issn.2095-4344.2161
- Author:
Yangyang SHI
1
Author Information
1. Department of Pediatrics, Affiliated Hospital of Binzhou Medical University
- Publication Type:Journal Article
- Keywords:
Bronchiolitis;
Experiment;
Inflammation;
Mice;
Placental mesenchymal stem cells;
Respiratory syncytial virus;
Stem cells
- From:
Chinese Journal of Tissue Engineering Research
2020;25(7):991-995
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: The recurrent attack of infantile bronchiolitis is one of the main causes of hospitalization, and its recurrent attack is closely related to the formation of asthma. In recent years, mesenchymal stem cells have been widely used in disease research. OBJECTIVE: To investigate the preventive effect of human placental mesenchymal stem cells on bronchiolitis in mice induced by respiratory syncytial virus. METHODS: Forty Balb/c mice were randomly divided into mesenchymal stem cell pretreatment group, saline pretreatment group, model group, and normal group, with 10 in each group. The mice in the mesenchymal stem cell pretreatment group were pre-injected with 1 mL human placenta mesenchymal stem cells (containing 1 × 106 cells) in the tail vein. The mice in the saline pretreatment group were injected with the same amount of normal saline in the tail vein. The mice in the model group and the normal group were not treated. After 4 weeks of routine feeding, every week except the normal group, the model of bronchiolitis was established by nose drops, once a day, for 2 consecutive days. At 24 hours after the last nasal drip, cough and asthma, cyanosis around mouth and extremities and pathological changes of lung tissue were observed; interleukin-4 level in peripheral blood and GATA3 protein expression in lung tissue were detected. RESULTS AND CONCLUSION: (1) Compared with the model group, the symptoms and inflammation of lung tissue were significantly reduced in the mesenchymal stem cell pretreatment group. (2) Interleukin-4 level in peripheral blood and GATA3 protein expression in lung tissue were significantly lower in the mesenchymal stem cell pretreatment group than those in the model group (P < 0.01). (3) Interleukin-4 level in peripheral blood and GATA3 protein expression in lung tissue did not significantly change in the saline pretreatment group compared with the model group (P > 0.05). (4) Results suggest that pretreatment of placental mesenchymal stem cells can significantly reduce the content of inflammatory factors interleukin-4 and GATA3 in the peripheral blood of mice with bronchiolitis caused by respiratory syncytial virus infection in the short term, and reduce the degree of inflammation of bronchiolitis.
