6652
Superoxide release stimulated by FMLP was inhibited partially by PD98059 or SB203580 , a specific inhibitor of ERK or p38 pathway , and was almost completely inhibited by the combination of both inhibitors, whereas PMA -induced superoxide release was resistant to these two inhibitors in monocytes .
 monocytes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 monocytes