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- W2019429336 abstract "While acute exposures to ozone (O 3) can alter airway responsiveness, effects from long-term exposures at low concentrations are less clear. This study assessed whether such exposures could induce nonspecific hyperresponsiveness in nonatopic (nonsensitized) guinea pigs and/or could exacerbate the pre-existing hyperresponsive state in atopic (sensitized) animals, and whether gender was a factor modulating any effect of O 3. Responsiveness was measured during and following exposures to 0.1 and 0.3 ppm O 3 for 4 h/day, 4 days/wk for 24 wk in male and female nonsensitized animals, those sensitized to allergen (ovalbumin) prior to initiation of O 3 exposures, and those sensitized concurrently with exposures. Ozone did not produce hyperresponsiveness in nonsensitized animals, but did exacerbate hyperresponsiveness to both specific and nonspecific bronchoprovocation challenges in sensitized animals, an effect that persisted through at least 4 wk after exposures ended. Gender was not a factor modulating response to O 3. Induced effects on responsiveness were not associated with numbers of eosinophils in the lungs nor with any chronic pulmonary inflammatory response, but were correlated with antigen-specific antibodies in blood. This study supports a role for chronic O 3 exposure in the exacerbation of airways dysfunction in a certain segment of the general population, namely, those demonstrating atopy." @default.
- W2019429336 created "2016-06-24" @default.
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- W2019429336 date "2002-01-01" @default.
- W2019429336 modified "2023-09-25" @default.
- W2019429336 title "OZONE DIFFERENTIALLY MODULATES AIRWAY RESPONSIVENESS IN ATOPIC VERSUS NONATOPIC GUINEA PIGS" @default.
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- W2019429336 doi "https://doi.org/10.1080/089583701753678562" @default.
- W2019429336 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2978653" @default.
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