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Northern blot analysis showed that ATL cells overexpressed that L-selectin mRNA and that the level was aberrantly upregulated after PMA stimulation .
 cell line: ATL cells; protein: L-selectin; RNA: L-selectin mRNA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell line: ATL cells; protein: L-selectin; RNA: L-selectin mRNA