7627
PROBLEM: The mechanisms of the immunosuppressive and immunosuppression-inducing capacities of Jeg-3 human choriocarcinoma cell line supernatants ( HCSs ) are not yet completely understood.
 ( cell line: Jeg-3 human choriocarcinoma cell line, 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: Jeg-3 human choriocarcinoma cell line, None) 