4485
Granulocyte-macrophage colony-stimulating factor ( GM-CSF ) induces immediate effects in monocytes by activation of the Janus kinase ( JAK2 ) and STAT transcription factor ( STAT5 ) pathway .
 STAT5, STAT transcription factor, Granulocyte-macrophage colony-stimulating factor, Janus kinase, GM-CSF, JAK2
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:
 STAT5, STAT transcription factor, Granulocyte-macrophage colony-stimulating factor, Janus kinase, GM-CSF, JAK2