3300
Additionally , HER effectively inhibited the phosphorylation of Akt and the phosphatidylinositol - 3 kinase ( PI3K ) inhibitor LY294002 increased the inhibition effect of HER on Akt phosphorylation .
 HER, phosphatidylinositol, LY294002, HER
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 HER, phosphatidylinositol, LY294002, HER