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These findings suggest that the Egr-1 mRNA activating signals through sIgM and sIgD are protein tyrosine kinase- and PKC- dependent , but protein kinase A -independent .
 Egr-1, Egr-1 mRNA, protein kinase A, sIgD, sIgM
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:
 Egr-1, Egr-1 mRNA, protein kinase A, sIgD, sIgM