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Dexamethasone , a glucocorticoid that is widely used as an immunomodulatory and anti-inflammatory agent , inhibits granzyme B mRNA transcript in phytohemagglutinin -activated peripheral blood mononuclear cells .
 phytohemagglutinin, granzyme B mRNA transcript, phytohemagglutinin -activated peripheral blood mononuclear 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:
 phytohemagglutinin, granzyme B mRNA transcript, phytohemagglutinin -activated peripheral blood mononuclear cells