1559
The mechanism of down-regulation of ICAM-I or LFA-I in 4 ATL cell lines was next examined.
 ( cell line: 4 ATL cell lines, None) , ( protein: LFA-I, None) , ( protein: ICAM-I, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: 4 ATL cell lines, None) , ( protein: LFA-I, None) , ( protein: ICAM-I, None) 