Fine particulate matter alters the microecology of the murine respiratory tract
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Abstract
Fine particulate matter is a global challenge to human health. We investigated the effects and potential mechanisms of fine particulate matter on respiratory tract microecology in a lung injury mouse model. BALB/c mice were randomized into exposed and control groups. We found that the levels of soluble tumor necrosis factor receptor I was increased following the PM2.5 exposure. 16S rRNA sequencing of respiratory tract lavage fluid confirmed that the composition of the respiratory tract microecology was altered by the exposure. Lactobacillus was the most abundant of bacterial species present. Collectively, these results establish a link between exposure to fine particulate matter and alterations to the respiratory tract microecology. Elucidation of the underlying mechanisms may lead to treatment strategies in lung injury.
Keywords
PM2.5 Lung injury Microecology Respiratory tract MouseAbbreviations
- PM2.5
fine particulate matter
- rRNA
ribosomal RNA
- H&E
hematoxylin and eosin
- EtOH
ethanol
- PCR
polymerase chain reaction
- RDP classifier
Ribosomal Database Project classifier
- OTU
operational taxonomic unit
- PCA
principal component analysis
- PCoA
principal coordinates analysis
- UPGMA
unweighted pair-group method with arithmetic means
- sTNF-RI
soluble tumor necrosis factor type I
- KEGG
Kyoto Encyclopedia of Genes and Genomes
- TNF
tumor necrosis factor
- kD
kilodalton
Notes
Author contributions statement
BY and CX contributed conception and design of the study; BY carried out all experimental assays. YZ and BL performed the statistical analysis; BY wrote the first draft of the manuscript; BY, YZ, YZ, and BL wrote sections of the manuscript. All authors contributed to manuscript revision and read and approved the submitted version.
Funding information
The work was supported by the research funding from the National Natural Science Foundation of China (grant no. 30872083) and Liaoning Science and Technology Project (grant no. 2017225076).
Compliance with ethical standards
All studies were performed according to protocols reviewed and approved by the Ethics Committee of Animal Care and Experimentation of the National Institute for Environmental Studies, China.
Conflict of interest
The authors declare that they have no competing interests.
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