Effects of LB, an inhibitor of EGFR export from the nucleus, on spontaneous and TGF-α-induced chemokine production by NHEK. IL-8 (A), MCP-1 (B), and IP-10 (C) expression upon action of LB or its combination with 50 μM PPs or its combination with TGF-α (10 ng/ml) or its combination with TGF-α and PPs. *p<0.05 versus untreated control, §p<0.05 versus LB alone, †p<0.05 versus TGF-α alone, and ‡p<0.01 versus LB+TGF-α.