3752
These results suggest that phosphorylated pRB is constitutively expressed in MM cells and that IL-6 further shifts pRB from its dephosphorylated to its phosphorylated form, thereby promoting MM cell growth via two mechanisms; by decreasing the amount of E2F bound by dephosphorylated pRB due to reduced dephosphorylated pRB , thereby releasing growth arrest; and by upregulating IL-6 secretion by MM cells and related IL-6 -mediated autocrine tumor cell growth .
 protein: pRB; cell line: MM cells; protein: pRB; protein: phosphorylated pRB; protein: IL-6; protein: dephosphorylated pRB; protein: dephosphorylated pRB; protein: IL-6; protein: IL-6; cell line: MM cells; protein: pRB; protein: pRB
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: pRB, MM cells, pRB, phosphorylated pRB, IL-6, dephosphorylated pRB, dephosphorylated pRB, IL-6, IL-6, MM cells, pRB, pRB 
Answer:
 protein: pRB; cell line: MM cells; protein: pRB; protein: phosphorylated pRB; protein: IL-6; protein: dephosphorylated pRB; protein: dephosphorylated pRB; protein: IL-6; protein: IL-6; cell line: MM cells; protein: pRB; protein: pRB