Abstract:
OBJECTIVES:Cyclosporine A (CsA) is used as an immunosuppressive agent and its prominent side effect is the induction of gingival overgrowth. Type I plasminogen activator inhibitor (PAI-1) has shown to play an important role in CsA-induced gingival overgrowth. However, little is known about whether factors can modulate CsA-induced PAI-1 expression. METHODS:Cytotoxicity, reverse transcriptase-polymerase chain reaction, and enzyme-linked immunosorbent assay were used to investigate the effects of Human gingival fibroblasts (HGFs) exposed to CsA. In addition, Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, interlukin-1alpha, tumor necrosis factor-alpha, mitogen-activated protein kinase kinase (MEK) inhibitor U0126, signal-regulated protein kinase (ERK) inhibitor PD98059 and cell-permeable glutathione precursor N-acetyl-L-cysteine (NAC) were added to test how they modulated the effects of CsA-induced PAI-1 expression. RESULTS:The concentration of CsA higher than 500 ng ml(-1) demonstrated cytotoxicity to HGFs (P < 0.05). Periodontal pathogens as well as proinflammatory cytokines were found to increase the CsA-induced PAI-1 mRNA and protein expression (P < 0.05). Pharmacological agents NAC, U0126, and PD98059 were found to decrease the CsA-induced PAI-1 mRNA and protein expression (P < 0.05). CONCLUSIONS:Cyclosporine A (CsA) may predispose to gingival overgrowth under inflammatory environments. The regulation of PAI-1 expression induced by CsA might be critically related with the intracellular glutathione and the ERK-MAPK pathway.
journal_name
Oral Disjournal_title
Oral diseasesauthors
Ho YC,Lin HJ,Tsai CH,Chang YCdoi
10.1111/j.1601-0825.2009.01653.xsubject
Has Abstractpub_date
2010-05-01 00:00:00pages
396-401issue
4eissn
1354-523Xissn
1601-0825pii
ODI1653journal_volume
16pub_type
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