6449
The results showed that tigecycline significantly attenuated the expression and the release of nuclear factor - kappa beta ( NF - kappa B ) , tumor necrosis factor - alpha ( TNF - alpha ) and interleukin - 1beta ( IL - 1 beta ) , as well as nitric oxide ( NO ) levels in LPS - induced PC12 cells .
 Chemical: tigecycline; Chemical: nitric oxide; Chemical: NO
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: tigecycline; Chemical: nitric oxide; Chemical: NO