13978
These results suggested that TNF - alpha - induced MMP - 9 expression is mediated through a c - Src / EGFR , PDGFR / PI3K / Akt / MAPKs / AP - 1 cascade in H9c2 cells .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None