6295
Many environmental factors, in particular, proinflammatory cytokines and growth factors , can exert regulatory effects on MSR expression , whereas intracellular accumulation of cholesterol itself does not influence MSR levels to any considerable extent.
 ( protein: MSR, None) , ( protein: proinflammatory cytokines, None) , ( protein: growth factors, None) , ( protein: MSR, 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:
 ( protein: MSR, None) , ( protein: proinflammatory cytokines, None) , ( protein: growth factors, None) , ( protein: MSR, None) 