13857
In addition, PPARgamma mRNA expression in U937 cells increased during phorbol 12-myristate 13 acetate -induced differentiation .
 PPARgamma, PPARgamma mRNA, U937 cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 PPARgamma, PPARgamma mRNA, U937 cells