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NaAsO ( 2 ) increased the mRNA levels of the light and medium subunits of neurofilament and decreased the mRNA levels of tau and tubulin in a dose - dependent manner ; no significant effect was found in the mRNA levels of the heavy subunit of neurofilament , microtubule - associated protein 2 , or actin .
 Chemical: NaAsO ( 2 )
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: NaAsO ( 2 )