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Effects of NM on lung cancer cell lines A-549 MMP-2 and -9 expression. Gelatinase zymograms of normal A-549 cell MMP-2 secretion (A) and PMA-treated A-549 cell MMP-2 and -9 secretion (B). Lane 1, markers; lane 2, control; lanes 3–7, NM 50, 100, 250, 500 and 1,000 μg/ml. Densitometric analyses of normal A-549 cell MMP-2 secretion (C) and PMA-treated A-549 MMP-2 and -9 secretion (D).
