15675
Studies using TLR knock - out mice have shown that nerve injury - induced microglial Nox2 up - regulation is abrogated in TLR2 but not in TLR3 or - 4 knock - out mice .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None