8010
When cells were cultured in the presence of progesterone they released a soluble factor that inhibited cellular immunoreactions ( MLR , CRC ) and cellular proliferation as measured by thymidine incorporation by spleen-cell culture .
 ( protein: soluble factor, None) , ( cell line: spleen-cell culture, 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: soluble factor, None) , ( cell line: spleen-cell culture, None) 