7155
However, we could not prove that Th2 type cytokines had a protective effect on hepatocytes .
 ( cell type: hepatocytes, None) , ( protein: cytokines, None) , ( protein: Th2 type cytokines, 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 type: hepatocytes, None) , ( protein: cytokines, None) , ( protein: Th2 type cytokines, None) 