5471
Our results indicate that gp120 enhances ICAM-1 gene expression in primary rat astrocytes , primary human astrocytes , a human astroglioma cell line CRT , and primary rat microglia .
 ( cell line: human astroglioma cell line CRT, None) , ( cell type: astrocytes, None) , ( cell type: primary rat microglia, None) , ( protein: gp120, None) , ( cell type: primary rat astrocytes, None) , ( cell type: astrocytes, None) , ( cell type: microglia, None) , ( cell type: primary human astrocytes, None) , ( protein: ICAM-1, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: human astroglioma cell line CRT, None) , ( cell type: astrocytes, None) , ( cell type: primary rat microglia, None) , ( protein: gp120, None) , ( cell type: primary rat astrocytes, None) , ( cell type: astrocytes, None) , ( cell type: microglia, None) , ( cell type: primary human astrocytes, None) , ( protein: ICAM-1, None) 