3975
In addition , nuclear factor - kappa B and inducible nitric oxide synthase levels significantly decreased after PD treatment , as did the levels of hepatocyte apoptosis .
 Chemical: nitric oxide
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: nitric oxide