Western blot analysis was done as described previously [8 (link)]. The membrane was incubated with specific antibodies: mouse monoclonal antibodies against MMP9, p-p65, p65, p-IκB, STAT3, p-STAT3, histone H1 and β-actin (1:500 dilution, Santa Cruz Biotechnology Inc. Santa Cruz, CA, USA), Goat rabbit polyclonal MMP3 (1:500 dilution, Santa Cruz Biotechnology Inc. Santa Cruz, CA, USA), rabbit polyclonal for p50, p-IKKα, IKKα, p-IKKβ, IKKβ, p-IκB and IκB (1:500 dilution, Santa Cruz Biotechnology Inc.) and iNOS and COX-2 (1:1000 dilution, Cayman Chemical, Ann Arbor, Mich, USA). The relative density of the protein bands was scanned by densitometry using MyImage (SLB, Seoul, Korea) and quantified by Labworks 4.0 software (UVP, Inc., Upland, CA, USA).
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