STAT1 and Miyoshi myopathy: Fig. 2C revealed that the mRNA expression levels of RIG-I in MM cell lines (U266, RPMI-8226, NCI-H929) were notably lower than those in nPCs, especially in U266 cells (p < 0.05). Protein expression levels of p-STAT1/STAT1 and RIG-I in MM cells were also observably lower than those in nPCs, particularly in U266 cells (p < 0.05, Fig. 2D).