1927
Since HUVECs released superoxide anions in response to TNF, and H2O2 induces VCAM-1 , PDTC may act as a radical scavenger .
 ( protein: VCAM-1, None) , ( cell line: HUVECs, 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: VCAM-1, None) , ( cell line: HUVECs, None) 