1534
Tumor necrosis factor alpha ( TNF alpha ) is particularly important in this process because of its ability to regulate other inflammatory mediators in an autocrine and paracrine fashion .
 TNF alpha, Tumor necrosis factor alpha
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:
 TNF alpha, Tumor necrosis factor alpha