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SV - HUC - 1 cells were exposed to sodium arsenite and COX - 2 expression , mitogen - activated protein kinase ( MAPK ) phosphorylation , glutathione ( GSH ) levels , ROS induction and Nrf2 expression were quantified .
 Chemical: sodium arsenite; Chemical: glutathione; Chemical: GSH
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: sodium arsenite; Chemical: glutathione; Chemical: GSH