Abstract
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Cathepsin B, D, and L Regulation in Cyclosporin A-mediated Gingival Hyperplasia of a Patient with Sarcoidosis
by Osamu Murai, Koji Naruishi, Satoshi Ogihara, Nagisa Suwa, Satomi Kanazawa, Takashi Yaegashi, Yasunori Takeda, Kazushi Kunimatsu
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Background: Cyclosporin A (CsA) is an immunosuppressant with side effects including gingival hyperplasia. Sarcoidosis is a systemic disease characterized by granulomas. Here, we report on a rare case of sarcoidosis with gingival hyperplasia to clarify whether clinical observation corresponds to in vitro results.
Methods: Gingival fibroblasts (HGFs) were isolated from healthy gingiva and cultured with CsA. Total RNA was collected and expression of mRNAs examined using semi-quantitative RT-PCR analysis. Cathepsin B, D, and L expression in overgrown gingiva of the patient was examined by immunohistochemistry.
Results: Cathepsin D, L, and vascular endothelial growth factor (VEGF)165 mRNA were markedly suppressed in CsA-treated HGFs, whereas cathepsin B, matrix metalloproteinase-1 (MMP-1) and tissue inhibitor of metalloproteinase-1 (TIMP-1) mRNA were not reduced. Next, the decrease of cathepsin B and L expression in enlarged gingiva was observed, whereas an increase of cathepsin D expression was observed. Clinically, the enlarged gingival lesions were fully resolved by performing oral infection control.
Conclusions: Cathepsins regulation might be an important factor in the development of CsA-mediated gingival hyperplasia.
DOI: Clin. Lab. 2011;57:535-541
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