8789
Therefore, the high radiosensitivity of squamous cell carcinomas in our samples could be explained by an overexpression of c-fos in the tumor-infiltrating lymphocytes induced by small doses of radiation therapy , and these activated lymphocytes exerted a cytotoxic effect against the cancer cells .
 ( protein: c-fos, None) , ( cell type: tumor-infiltrating lymphocytes, None) , ( cell type: cancer cells, None) , ( cell type: activated lymphocytes, 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: c-fos, None) , ( cell type: tumor-infiltrating lymphocytes, None) , ( cell type: cancer cells, None) , ( cell type: activated lymphocytes, None) 