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Considering the strong positive regulatory effect of this element and its presence in several T-cell-expressed cytokine genes , it may be crucial to the coordinated expression of these cytokines in T helper cells .
 T-cell-expressed cytokine genes, cytokines, element, T helper 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:
 T-cell-expressed cytokine genes, cytokines, element, T helper cells