15371
Collectively , these data suggest that 2 . 5 - 5 . 0 mu M Pb increased MHC - II surface expression by inhibiting metabolic activity , inducing autophagy , and increasing MHC - II trafficking in a macrophage cell line .
 Chemical: Pb
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: Pb