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In a concentration-dependent manner , NO inhibited interleukin (IL)-1 alpha-stimulated VCAM-1 expression by 35-55% as determined by cell surface enzyme immunoassays and flow cytometry .
 ( protein: interleukin (IL)-1, None) , ( protein: VCAM-1, 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:
 ( protein: interleukin (IL)-1, None) , ( protein: VCAM-1, None) 