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Effects of interferon (IFN)‐γ on matrix metalloproteinase (MMP) expression. Hela and K562 cell lines were stimulated with 1000 u/mL IFNγ for the indicated times. (a) mRNA expression of MMP9, membrane‐type matrix metalloproteinase (MT‐MMP), and tissue inhibitor of matrix metalloproteinase (TIMP) was measured by real‐time polymerase chain reaction. (b) MMP protein expression in Hela and K562 cell lines was detected by western blotting.
