5472
The signal transduction events involved in gp120 -mediated enhancement of ICAM-1 appear to involve activation of both protein kinase C and tyrosine kinase , because inhibitors of protein kinase C and tyrosine kinase abrogate gp120 -mediated ICAM-1 expression in both astrocytes and microglia .
 gp120, protein kinase C, astrocytes, ICAM-1, microglia, tyrosine kinase, ICAM-1, protein kinase C, gp120, tyrosine kinase
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:
 gp120, protein kinase C, astrocytes, ICAM-1, microglia, tyrosine kinase, ICAM-1, protein kinase C, gp120, tyrosine kinase