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Finally, PPARalpha activators significantly reduced adhesion of U937 cells to cultured human ECs .
 cell line: U937 cells; protein: PPARalpha; cell type: cultured human ECs
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: U937 cells, PPARalpha, cultured human ECs 
Answer:
 cell line: U937 cells; protein: PPARalpha; cell type: cultured human ECs