6301
Thus, exposure to IL-6 may inhibit expression of the class A MSR in differentiated macrophages at transcriptional levels.
 cell type: macrophages; protein: MSR; protein: class A MSR; protein: IL-6
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: macrophages, MSR, class A MSR, IL-6 
Answer:
 cell type: macrophages; protein: MSR; protein: class A MSR; protein: IL-6