Abstract
In previous report, we have shown that trichloroethylene (TCE) increases histamine release and inflammatory cytokine production from antigen-stimulated mast cells. In this study, we examined the enhancing effect of a small amount of TCE ingestion from drinking water on antigen-stimulated allergic responses. After exposure of Wistar rats to TCE ingestion for 2 or 4 weeks, we performed a passive cutaneous anaphylaxis (PCA) reaction. TCE ingestion for 2 and 4 weeks enhanced PCA reaction in a dose-dependent manner. On histological examination, TCE ingestion for 2 weeks exacerbated inflammation characterized by infiltration of lymphocytes and accumulation of mast cells around the vessel in the skin. After TCE ingestion for 4 weeks, the mesenteric lymph nodes (MLNs) showed increase of the size and wet weight, and germinal centers changed distinctly. The interleukin-4 (IL-4) mRNA levels on spleen, MLNs and leukocytes were increased. Moreover, serum total IgE levels of TCE ingestion increased in a time-dependent manner. Our results suggest that TCE ingestion induces pro-inflammatory responses and causes Th1/Th2-type helper T-cell imbalance. And more, a small amount of TCE ingestion may lead to the initiation and acceleration of type I ...Continue Reading
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Jul 6, 2014·Occupational and Environmental Medicine·Emma BajeuxFabienne Pelé
Apr 3, 2012·The Journal of Toxicological Sciences·Ryo KobayashiHisamitsu Nagase
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