Immunological effect of PM2.5 on cytokine production in female Wistar rats |
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Authors: | Huang Ning-Hua Wang Qin Xu Dong-Qun |
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Affiliation: | School of Public Health, Beijing University, Beijing 100083, China. |
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Abstract: | OBJECTIVE: To investigate the immunological effect of PM2.5 on cytokine production in female Wistar rats. METHODS: Female Wistar rats were given 0.3 mg, 0.75 mg, 2 mg, 5 mg of PM2.5 per 0.5 mL saline, respectively. Saline was used as the negative control. TNF-alpha and IL-6 levels in the branchoalveolar lavage were measured by ELISA, and mRNA expression levels in lung tissue were detected by RT-PCR. Alveolar macrophages were collected for testing phogacytic function. RESULTS: Exposure to PM2.5 stimulated TNF-alpha production in a dose-dependent manner (P < 0.05), However, no statistically significant difference was found. No time-dependent change in TNF-a and IL-6 production was found. TNF-alpha and IL-6 mRNA expressions were induced by PM2.5-exposure. The phagocytic rate (PR) was significantly decreased by PM2.5 treatment. CONCLUSION: PM2.5 exposure increases inflammation response of the lung in a dose-dependent manner. Moreover, tissue injury induced by PM2.5 may be related to altered production of cytokines. PMz2.5 may impair the phagocytic activity of alveolar macrophages. |
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Keywords: | PM2 5 Inflammation Cytokine Phagocytic function |
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