Antibiotic-induced gut microbiota dysbiosis aggravates Mycoplasma pneumoniae infection
10.3760/cma.j.issn.0254-5101.2020.01.012
- VernacularTitle: 抗生素诱导的肠道菌群失调加重小鼠肺炎支原体感染
- Author:
Wuwei ZENG
1
;
Lan YU
1
;
Weiyan DING
1
;
Lijun HUANG
2
;
Liesong CHEN
1
;
Xiaoxing YOU
1
;
Cuiming ZHU
1
Author Information
1. Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Institute of Pathogenic Biology, University of South China, Hengyang 421001, China
2. Hunan Provincial Graduate Training Innovation Base, South China University-Nanyue Biopharming Corporation, Ltd., Hengyang 421001, China
- Publication Type:Journal Article
- Keywords:
Gut microbiota dysbiosis;
Mycoplasma pneumoniae;
Antibiotics;
Inflammation
- From:
Chinese Journal of Microbiology and Immunology
2020;40(1):68-73
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the influences of antibiotic-induced gut microbiota dysbiosis on Mycoplasma pneumoniae (Mp) airway infection.
Methods:C57BL/6J mice were treated with vancomycin and gentamicin for 21 d by oral delivery and then intranasally infected with Mp. Quantitative real-time PCR (qPCR) was performed to detect five major phyla of gut microbiota in mouse fecal specimens before and after antibiotic treatment and the loads of Mp in lung tissues on 3 d and 7 d after infection. Pathological changes in lung tissues were evaluated with HE staining. IFN-γ and IL-4 secreted by spleen CD4+ T cells and CD8+ T cells were analyzed by flow cytometry. Mp-specific IgM and IgG in mouse serum samples were measured by indirect enzyme-linked immunosorbent assay (ELISA).
Results:Vancomycin and gentamicin treatment significantly reduced the number of Bacteroidetes in mouse feces, but increased the amount of Firmicutes. Meanwhile, the numbers of δ, γ-Proteobacteria, Actinomycetes and Tenericutes also changed. These antibiotic-induced gut microbiota alterations in mice with Mp infection increased the loads of Mp in lung tissues and the pathological scores of lung tissue inflammation on 3 d and 7 d after infection, and reduced the number of IFN-γ-secreting spleen CD4+ T lymphocytes on 7 d.
Conclusions:Antibiotic-induced gut microbiota dysbiosis aggravated Mp airway infection.
