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Inflammatory mediator release from TT1 and ATII epithelial cells and AMs following treatment with MWCNTs for 24 hours. Release of IL-6, IL-8 and MCP-1 from MWCNT-exposed (1–50 µg/ml) TT1, ATII cells and AMs. Mediator release is presented as pg/ml; significant differences are indicated where * P < 0.05, ** P < 0.01 and *** P < 0.001.
