The inhibitory mechanism of a novel cationic glucosamine derivative against MMP-2 and MMP-9 expressions.
A number of recent researches have demonstrated the therapeutic effects of glucosamine (Glc) in a range of human diseases including arthritis. For the first time, we identified that a novel Glc derivative having quaternized amino functionality (QAGlc) suppresses MMP-9 and MMP-2, gelatinases in HT1080, human fibrosarcoma cells at 40microg/ml, following stimulation with PMA. Reporter gene assay results revealed that, the mechanism of suppression involves decreased transcriptional activation of MMP-9 and MMP-2 via transcription factors NF-kappaB and AP-1. However based on western blot results, QAGlc did not attenuate the nuclear translocation of both NF-kappaB and AP-1. Apparently, phorbol myristate acetate (PMA) stimulated expressions of ERK, JNK and p38 were altered in the presence of potent tumour inducer, phorbol myristate acetate QAGlc, suggesting their suppression also contributes to QAGlc-mediated inhibition of MMP-9 and MMP-2. Moreover, the ability of QAGlc to inhibit gelatinases was confirmed by its ability to act against invasiveness of HT1080 cells through extracellular matrix components.
Department of Food Science and Technology, University of Peradeniya, Sri Lanka.
Eresha
E
Mendis
Moon-Moo
MM
Kim
Niranjan
N
Rajapakse
Se-Kwon
SK
Kim
D045744:Cell Line, Tumor; D018093:Gelatinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D017930:Genes, Reporter; D005944:Glucosamine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry*; D006801:Humans; D020935:MAP Kinase Signaling System / Q000187:drug effects; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism*; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D016328:NF-kappa B / Q000037:antagonists & inhibitors / Q000378:metabolism; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D018808:Transcription Factor AP-1 / Q000037:antagonists & inhibitors / Q000378:metabolism; D014158:Transcription, Genetic
D016328:NF-kappa B; D018808:Transcription Factor AP-1; D018093:Gelatinases; D020778:Matrix Metalloproteinase 2; D020780:Matrix Metalloproteinase 9; D005944:Glucosamine; D013755:Tetradecanoylphorbol Acetate