Western blotting (A) for G and M2-1 proteins, claudin-4, occludin, phospho-NF-κB and NF-κB, RT-PCR (B) for G protein, RIG-I and MDA5 and ELISA (C) for TNFα and RANTES in HNECs pretreated with 0.1–10 μg/ml MG132 before infection with RSV at an MOI of 1.