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Paramyxovirus infection induced a 5- to 10-fold increase in the steady-state level of TNF-alpha RNA in U9-IIIB cells compared with U937 cells , suggesting that HIV-infected monocytic cells produced higher levels of TNF-alpha than did normal cells after a secondary virus infection .
 protein: TNF-alpha; cell line: U9-IIIB cells; protein: TNF-alpha; cell line: HIV-infected monocytic cells; RNA: TNF-alpha RNA; cell line: U937 cells
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:
 protein: TNF-alpha; cell line: U9-IIIB cells; protein: TNF-alpha; cell line: HIV-infected monocytic cells; RNA: TNF-alpha RNA; cell line: U937 cells