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PM-activated FN upregulation is attenuated by the NF-κB inhibitor Bay. HBECs were pretreated with 5 μM Bay for 30 min and then challenged with PM (100 μg/ml) for 48 h. A. FN protein levels were assayed by western blotting. B. The bar graph of relative FN levels. *, P<0.05 compared to CNTL. #, P<0.05 compared to the PM group. PM, particulate matter; FN, fibronectin.
