Given the task definition and input, reply with output. In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.

Environmental factor(s), such as viral infection, has been implicated as one of the triggering events leading to neuroinflammation in multiple sclerosis. This study underlines the importance of doublestranded RNA (dsRNA), the active component of a viral infection, in inducing the expression of inducible nitric oxide synthase (iNOS) in human astroglia. DsRNA in the form of synthetic polyinosinic-polycytidylic acid (poly IC) induced expression of iNOS and iNOS promoter-driven luciferase activity through activation of nuclear factor (NF)-B and CCAAT/enhancer-binding protein (C/EBP). In addition, we show that inhibitors of protein kinase R attenuated iNOS by suppressing the activation of NF-B but not C/EBP. In contrast, knock down of p38 mitogenactivated protein kinase (MAPK) attenuated iNOS by suppressing the activation of C/EBP but not NF-B. This study delineates a novel role of dsRNA in inducing the expression of iNOS through dsRNA-activated protein kinase (PKR)-mediated activation of NF-B and p38-mediated activation of C/EBP in human astroglia that may participate in virus-induced neurological abnormalities.
Role of protein kinase R in double-stranded RNA-induced expression of nitric oxide synthase in human astroglia