9522
The sense cell lines ( U alpha S and its clonal derivative alpha G2S ) showed increased sensitivity to RA , while the antisense cell lines ( U alpha A and its clonal derivative alpha B5A ) showed decreased sensitivity to RA , as demonstrated by growth inhibition and by regulation of an RA -responsive reporter gene .
 ( cell line: U alpha A, None) , ( cell line: U alpha S, None) , ( cell line: B5A, None) , ( cell line: antisense cell lines, None) , ( cell line: G2S, None) , ( cell line: sense cell lines, None) , ( DNA: RA -responsive reporter gene, 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: U alpha A, None) , ( cell line: U alpha S, None) , ( cell line: B5A, None) , ( cell line: antisense cell lines, None) , ( cell line: G2S, None) , ( cell line: sense cell lines, None) , ( DNA: RA -responsive reporter gene, None) 