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Epidermal growth factor receptor transcriptionally up - regulates vascular endothelial growth factor expression in human glioblastoma cells via a pathway involving phosphatidylinositol 3 ' - kinase and distinct from that induced by hypoxia .
 Epidermal growth factor receptor, vascular endothelial growth factor, phosphatidylinositol 3 ' - kinase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Epidermal growth factor receptor, vascular endothelial growth factor, phosphatidylinositol 3 ' - kinase