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- W4375865536 abstract "Particulate matter (PM) is a major component of air pollution from emissions from anthropogenic and natural sources and is a serious problem worldwide due to its adverse effects on human health. Increased particulate air pollution increases respiratory disease-related mortality and morbidity. However, the impact of PM with an aerodynamic diameter of ≤ 2.5 μm (PM2.5) on combined allergic rhinitis and asthma syndrome (CARAS) remains to be elucidated. Accordingly, in the present study, we investigated the effect of PM2.5 in an ovalbumin (OVA)-induced CARAS mouse model with a focus on NF-κB signaling.We established an OVA-induced mouse model of CARAS to determine the effects of exposure to PM2.5. BALB/c mice were randomly divided into four groups: (1) naive, (2) PM2.5, (3) CARAS, and (4) CARAS/PM2.5. Mice were systemically sensitized with OVA and challenged with inhalation of ultrasonically nebulized 5% OVA three times by intranasal instillation of OVA in each nostril for 7 consecutive days. Mice in the PM2.5 and CARAS/PM2.5 groups were then exposed to PM2.5 by intranasal instillation of PM2.5 for several days. We then examined the impacts of PM2.5 exposure on histopathology and NF-κB signaling in our OVA-induced CARAS mouse model.PM2.5 increased infiltration of eosinophils in bronchoalveolar lavage fluid (BALF) samples and inflammatory cells in lung tissue. It also increased production of GATA3, RORγ, IL-4, IL-5, IL-13, and IL-17 in nasal lavage fluid (NALF) and BALF samples in the CARAS mouse model, but secretion of IL-12 and IFN-γ was suppressed. Exposure to PM2.5 increased OVA-specific IgE and IgG1 levels in serum, inflammatory cell infiltration in the airways, and fibrosis in lung tissue. It also activated the NF-κB signaling pathway, increasing Th2/Th17 cytokine levels while decreasing Th1 cytokine expression, thereby inducing an inflammatory response and promoting inflammatory cell infiltration in nasal and lung tissue.Our results demonstrate that PM2.5 can aggravate OVA-induced CARAS." @default.
- W4375865536 created "2023-05-10" @default.
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- W4375865536 date "2023-06-01" @default.
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- W4375865536 title "PM2.5 exposure regulates Th1/Th2/Th17 cytokine production through NF-κB signaling in combined allergic rhinitis and asthma syndrome" @default.
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- W4375865536 doi "https://doi.org/10.1016/j.intimp.2023.110254" @default.
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