The aggravation of allergic airway inflammation with dibutyl phthalate involved in Nrf2-mediated activation of the mast cells

Dibutyl phthalate (DBP)-an organic pollutant-is ubiquitous in the environment. DBP as an immune adjuvant is related to the development of multiple allergic diseases. However, the current research involving DBP-induced pulmonary toxicity remains poorly understood. Therefore, this research aimed to ex...

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Veröffentlicht in:The Science of the total environment 2021-10, Vol.789, p.148029-148029, Article 148029
Hauptverfasser: Wang, Xiaoqiao, Lv, Zhanjun, Han, Bing, Li, Siyu, Yang, Qingyue, Wu, Pengfei, Li, Jiayi, Han, Biqi, Deng, Ning, Zhang, Zhigang
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container_title The Science of the total environment
container_volume 789
creator Wang, Xiaoqiao
Lv, Zhanjun
Han, Bing
Li, Siyu
Yang, Qingyue
Wu, Pengfei
Li, Jiayi
Han, Biqi
Deng, Ning
Zhang, Zhigang
description Dibutyl phthalate (DBP)-an organic pollutant-is ubiquitous in the environment. DBP as an immune adjuvant is related to the development of multiple allergic diseases. However, the current research involving DBP-induced pulmonary toxicity remains poorly understood. Therefore, this research aimed to explore the adverse effect and potential mechanism of DBP exposure on the lungs in rats. In our study, ovalbumin was used to build a rat model of allergic airway inflammation to study any harmful effect of DBP exposure on lung tissues. Rats were treated by intragastric administration of DBP (500 mg kg−1 or 750 mg kg−1) and/or subcutaneous injection of SFN (4 mg kg−1). The results of histopathological analysis, cell count, and myeloperoxidase showed that DBP promoted the inflammatory damage of lungs. In the lung tissues, the detection of terminal deoxynucleotidyl transferase dUNT nick end labeling and oxidative stress indices showed that DBP significantly increased the level of apoptosis and oxidative stress. Western blot analysis indicated that DBP raised the expression level of thymic stromal lymphopoietin and reduced the nuclear expression level of nuclear factor-erythroid-2-related factor 2 (Nrf2), which was further verified by quantitative real-time PCR. Meanwhile, DBP treatment markedly up-regulated the inflammatory cytokines such as IL-4 and IL-13, and rat mast cell protease-2, a marker secreted by mast cells (MCs). Conversely, sulforaphane, a Nrf2 inducer, ameliorated the pulmonary damage induced by DBP in the above. Altogether, our data provides a new insight into the impacts of the activation of MCs on the DBP-induced pulmonary toxicity as well as the safety evaluation of DBP. [Display omitted] •Dibutyl phthalate (DBP) exposure aggravates allergic airway inflammation in rats.•DBP inhibits Nrf2 signaling pathway and promotes oxidative stress in the lungs.•DBP activates the MCs and promotes secretion of the inflammatory factors.•DBP activates MCs involved in the high levels of oxidative stress.•DBP aggravates allergic airway inflammation via activation of the MCs.
doi_str_mv 10.1016/j.scitotenv.2021.148029
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DBP as an immune adjuvant is related to the development of multiple allergic diseases. However, the current research involving DBP-induced pulmonary toxicity remains poorly understood. Therefore, this research aimed to explore the adverse effect and potential mechanism of DBP exposure on the lungs in rats. In our study, ovalbumin was used to build a rat model of allergic airway inflammation to study any harmful effect of DBP exposure on lung tissues. Rats were treated by intragastric administration of DBP (500 mg kg−1 or 750 mg kg−1) and/or subcutaneous injection of SFN (4 mg kg−1). The results of histopathological analysis, cell count, and myeloperoxidase showed that DBP promoted the inflammatory damage of lungs. In the lung tissues, the detection of terminal deoxynucleotidyl transferase dUNT nick end labeling and oxidative stress indices showed that DBP significantly increased the level of apoptosis and oxidative stress. Western blot analysis indicated that DBP raised the expression level of thymic stromal lymphopoietin and reduced the nuclear expression level of nuclear factor-erythroid-2-related factor 2 (Nrf2), which was further verified by quantitative real-time PCR. Meanwhile, DBP treatment markedly up-regulated the inflammatory cytokines such as IL-4 and IL-13, and rat mast cell protease-2, a marker secreted by mast cells (MCs). Conversely, sulforaphane, a Nrf2 inducer, ameliorated the pulmonary damage induced by DBP in the above. Altogether, our data provides a new insight into the impacts of the activation of MCs on the DBP-induced pulmonary toxicity as well as the safety evaluation of DBP. 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Western blot analysis indicated that DBP raised the expression level of thymic stromal lymphopoietin and reduced the nuclear expression level of nuclear factor-erythroid-2-related factor 2 (Nrf2), which was further verified by quantitative real-time PCR. Meanwhile, DBP treatment markedly up-regulated the inflammatory cytokines such as IL-4 and IL-13, and rat mast cell protease-2, a marker secreted by mast cells (MCs). Conversely, sulforaphane, a Nrf2 inducer, ameliorated the pulmonary damage induced by DBP in the above. Altogether, our data provides a new insight into the impacts of the activation of MCs on the DBP-induced pulmonary toxicity as well as the safety evaluation of DBP. 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Western blot analysis indicated that DBP raised the expression level of thymic stromal lymphopoietin and reduced the nuclear expression level of nuclear factor-erythroid-2-related factor 2 (Nrf2), which was further verified by quantitative real-time PCR. Meanwhile, DBP treatment markedly up-regulated the inflammatory cytokines such as IL-4 and IL-13, and rat mast cell protease-2, a marker secreted by mast cells (MCs). Conversely, sulforaphane, a Nrf2 inducer, ameliorated the pulmonary damage induced by DBP in the above. Altogether, our data provides a new insight into the impacts of the activation of MCs on the DBP-induced pulmonary toxicity as well as the safety evaluation of DBP. [Display omitted] •Dibutyl phthalate (DBP) exposure aggravates allergic airway inflammation in rats.•DBP inhibits Nrf2 signaling pathway and promotes oxidative stress in the lungs.•DBP activates the MCs and promotes secretion of the inflammatory factors.•DBP activates MCs involved in the high levels of oxidative stress.•DBP aggravates allergic airway inflammation via activation of the MCs.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.scitotenv.2021.148029</doi><tpages>1</tpages></addata></record>
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subjects Allergic airway inflammation
Dibutyl phthalate
Mast cells
Nrf2
Oxidative stress
Sulforaphane
title The aggravation of allergic airway inflammation with dibutyl phthalate involved in Nrf2-mediated activation of the mast cells
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