7902
Cell culture studies demonstrated that PKAA is capable of delivering anti - TNF ( tumor necrosis factor ) - alpha siRNA to lipopolysaccharide ( LPS ) - stimulated macrophages and significantly inhibits the expression of TNF - alpha .
 Chemical: PKAA
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: PKAA