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The Microbiome Regulates Pulmonary Responses to Ozone in Mice.
Am J Respir Cell Mol Biol 2018; 59(3):346-354AJ

Abstract

Previous reports demonstrate that the microbiome impacts allergic airway responses, including airway hyperresponsiveness, a characteristic feature of asthma. Here we examined the role of the microbiome in pulmonary responses to a nonallergic asthma trigger, ozone. We depleted the microbiota of conventional mice with either a single antibiotic (ampicillin, metronidazole, neomycin, or vancomycin) or a cocktail of all four antibiotics given via the drinking water. Mice were then exposed to room air or ozone. In air-exposed mice, airway responsiveness did not differ between antibiotic- and control water-treated mice. Ozone caused airway hyperresponsiveness, the magnitude of which was decreased in antibiotic cocktail-treated mice versus water-treated mice. Except for neomycin, single antibiotics had effects similar to those observed with the cocktail. Compared with conventional mice, germ-free mice also had attenuated airway responsiveness after ozone. 16S ribosomal RNA gene sequencing of fecal DNA to characterize the gut microbiome indicated that bacterial genera that were decreased in mice with reduced ozone-induced airway hyperresponsiveness after antibiotic treatment were short-chain fatty acid producers. Serum analysis indicated reduced concentrations of the short-chain fatty acid propionate in cocktail-treated mice but not in neomycin-treated mice. Dietary enrichment with pectin, which increased serum short-chain fatty acids, also augmented ozone-induced airway hyperresponsiveness. Furthermore, propionate supplementation of the drinking water augmented ozone-induced airway hyperresponsiveness in conventional mice. Our data indicate that the microbiome contributes to ozone-induced airway hyperresponsiveness, likely via its ability to produce short-chain fatty acids.

Authors+Show Affiliations

1 Department of Environmental Health and.2 Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts.1 Department of Environmental Health and.1 Department of Environmental Health and.1 Department of Environmental Health and.1 Department of Environmental Health and.1 Department of Environmental Health and.2 Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts.1 Department of Environmental Health and.

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

29529379

Citation

Cho, Youngji, et al. "The Microbiome Regulates Pulmonary Responses to Ozone in Mice." American Journal of Respiratory Cell and Molecular Biology, vol. 59, no. 3, 2018, pp. 346-354.
Cho Y, Abu-Ali G, Tashiro H, et al. The Microbiome Regulates Pulmonary Responses to Ozone in Mice. Am J Respir Cell Mol Biol. 2018;59(3):346-354.
Cho, Y., Abu-Ali, G., Tashiro, H., Kasahara, D. I., Brown, T. A., Brand, J. D., ... Shore, S. A. (2018). The Microbiome Regulates Pulmonary Responses to Ozone in Mice. American Journal of Respiratory Cell and Molecular Biology, 59(3), pp. 346-354. doi:10.1165/rcmb.2017-0404OC.
Cho Y, et al. The Microbiome Regulates Pulmonary Responses to Ozone in Mice. Am J Respir Cell Mol Biol. 2018;59(3):346-354. PubMed PMID: 29529379.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Microbiome Regulates Pulmonary Responses to Ozone in Mice. AU - Cho,Youngji, AU - Abu-Ali,Galeb, AU - Tashiro,Hiroki, AU - Kasahara,David I, AU - Brown,Traci A, AU - Brand,Jeffrey D, AU - Mathews,Joel A, AU - Huttenhower,Curtis, AU - Shore,Stephanie A, PY - 2018/3/13/pubmed PY - 2019/4/17/medline PY - 2018/3/13/entrez KW - 16S rRNA gene sequencing KW - airway responsiveness KW - antibiotics KW - germ-free mice KW - neutrophil SP - 346 EP - 354 JF - American journal of respiratory cell and molecular biology JO - Am. J. Respir. Cell Mol. Biol. VL - 59 IS - 3 N2 - Previous reports demonstrate that the microbiome impacts allergic airway responses, including airway hyperresponsiveness, a characteristic feature of asthma. Here we examined the role of the microbiome in pulmonary responses to a nonallergic asthma trigger, ozone. We depleted the microbiota of conventional mice with either a single antibiotic (ampicillin, metronidazole, neomycin, or vancomycin) or a cocktail of all four antibiotics given via the drinking water. Mice were then exposed to room air or ozone. In air-exposed mice, airway responsiveness did not differ between antibiotic- and control water-treated mice. Ozone caused airway hyperresponsiveness, the magnitude of which was decreased in antibiotic cocktail-treated mice versus water-treated mice. Except for neomycin, single antibiotics had effects similar to those observed with the cocktail. Compared with conventional mice, germ-free mice also had attenuated airway responsiveness after ozone. 16S ribosomal RNA gene sequencing of fecal DNA to characterize the gut microbiome indicated that bacterial genera that were decreased in mice with reduced ozone-induced airway hyperresponsiveness after antibiotic treatment were short-chain fatty acid producers. Serum analysis indicated reduced concentrations of the short-chain fatty acid propionate in cocktail-treated mice but not in neomycin-treated mice. Dietary enrichment with pectin, which increased serum short-chain fatty acids, also augmented ozone-induced airway hyperresponsiveness. Furthermore, propionate supplementation of the drinking water augmented ozone-induced airway hyperresponsiveness in conventional mice. Our data indicate that the microbiome contributes to ozone-induced airway hyperresponsiveness, likely via its ability to produce short-chain fatty acids. SN - 1535-4989 UR - https://www.unboundmedicine.com/medline/citation/29529379/The_Microbiome_Regulates_Pulmonary_Responses_to_Ozone_in_Mice_ L2 - http://www.atsjournals.org/doi/full/10.1165/rcmb.2017-0404OC?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -