The Effects of Air Pollution on The Salivary Iga Levels in Children

Mehrbani, Solmaz Pourzare; Babaloo, Zohreh; Eslami, Hosein; Abdollahian, Tahmoores; tabatabai, Vahid motameni

doi:10.13005/bpj/987

Cited by 1 publication

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“…A previous study of ambient particulate matter exposure on Sprague–Dawley rats increased secretory IgA levels but decreased IgG ( Li et al, 2017 ). A decrease in salivary IgA has been observed in children living in polluted regions ( Mehrbani et al, 2016 ). These discrepancies observed between different studies can be explained by several reasons, including different study models, variations in the components of exposed particulates and gaseous emissions, as well as the duration and intensity of exposures.…”

Section: Discussionmentioning

confidence: 99%

Traffic generated emissions alter the lung microbiota by promoting the expansion of Proteobacteria in C57Bl/6 mice placed on a high-fat diet

Daniel

Pusadkar

McDonald

et al. 2021

Ecotoxicology and Environmental Safety

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Air pollution has been documented to contribute to severe respiratory diseases like asthma and chronic obstructive pulmonary disorder (COPD). Although these diseases demonstrate a shift in the lung microbiota towards Proteobacteria, the effects of traffic generated emissions on lung microbiota profiles have not been well-characterized. Thus, we investigated the hypothesis that exposure to traffic-generated emissions can alter lung microbiota and immune defenses. Since a large population of the Western world consumes a diet rich in fats, we sought to investigate the synergistic effects of mixed vehicle emissions and high-fat diet consumption. We exposed 3-month-old male C57Bl/6 mice placed either on regular chow (LF) or a high-fat (HF: 45% kcal fat) diet to mixed emissions (ME: 30 μg PM/m 3 gasoline engine emissions + 70 μg PM/m 3 diesel engine emissions) or filtered air (FA) for 6 h/d, 7 d/wk for 30 days. Levels of pulmonary immunoglobulins IgA, IgG, and IgM were analyzed by ELISA, and lung microbial profiling was done using qPCR and Illumina 16 S sequencing. We observed a significant decrease in lung IgA in the ME-exposed animals, compared to the FA-exposed animals, both fed a HF diet. Our results also revealed a significant decrease in lung IgG in the ME-exposed animals both on the LF diet and HF diet, in comparison to the FA-exposed animals. We also observed an expansion of Enterobacteriaceae belonging to the Proteobacteria phylum in the ME-exposed groups on the HF diet. Collectively, we show that the combined effects of ME and HF diet result in decreased immune surveillance and lung bacterial dysbiosis, which is of significance in lung diseases.

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Section: Discussionmentioning

confidence: 99%