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. 2011 Jan;36(1):135-9.
doi: 10.2131/jts.36.135.

Chronic Exposure to Arsenite Induces S100A8 and S100A9 Expression in Rat RBL-2H3 Mast Cells

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Chronic Exposure to Arsenite Induces S100A8 and S100A9 Expression in Rat RBL-2H3 Mast Cells

Yuri Shimizu et al. J Toxicol Sci. .
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Abstract

To investigate the effects of chronic exposure to arsenite on the gene expression profiles of mast cells, microarray analysis was performed on rat basophilic leukemia RBL-2H3 cells exposed to arsenite for 28 days. Upregulated genes include calcium-binding S100 proteins such as S100A9, S100A10, S100A6, and S100A13, and granzymes B and C. Among S100 proteins, S100A9 showed the highest expression (8.62-fold of untreated cells) after 4-weeks of exposure to arsenite. As S100A8 and S100A9 comprise a heterodimer called calprotectin, and are implicated in the development of atherosclerosis and cancer, mRNA levels of both S100A8 and S100A9 were analyzed. The results demonstrated that exposure of RBL-2H3 cells to arsenite for a few weeks induces marked increases in mRNA levels of S100A8 and S100A9.

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