Elevated transglutaminase-2 expression mediates fibrosis in areca quid chewing-associated oral submucocal fibrosis via reactive oxygen species generation

被引:16
|
作者
Lee, Shiuan-Shinn [1 ]
Chen, Yi-Juai [2 ]
Tsai, Chung-Hung [3 ]
Huang, Fu-Mei [2 ]
Chang, Yu-Chao [2 ,4 ]
机构
[1] Chung Shan Med Univ, Sch Publ Hlth, Taichung 40201, Taiwan
[2] Chung Shan Med Univ, Sch Dent, 110 Sec 1,Chien Kuo N Rd, Taichung 40201, Taiwan
[3] Chung Shan Med Univ Hosp, Dept Oral Pathol, Taichung 40201, Taiwan
[4] Chung Shan Med Univ Hosp, Dept Dent, Taichung 40201, Taiwan
关键词
Transglutaminase-2; Oral submucocal fibrosis; Arecoline; Antioxidants; UP-REGULATION; TISSUE TRANSGLUTAMINASE; OXIDATIVE STRESS; FIBROBLASTS; ARECOLINE; PATHOGENESIS; ANTIOXIDANT; INHIBITION;
D O I
10.1007/s00784-015-1579-0
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Transglutaminase-2 (TGM-2) protein is involved in the cross-linking of matrix proteins resulting in several fibrotic disorders and can be induced by reactive oxygen species (ROS). Little is known about its role in the development of oral submucocal fibrosis (OSF). Hence, we hypothesize that TGM-2 may have a role in the pathogenesis of areca quid chewing-associated OSF and arecoline, a major areca nut alkaloid, could regulate TGM-2 via ROS generation. Forty OSF specimens from areca quid chewing-associated OSF and ten normal buccal mucosa biopsy samples without areca quid chewing were analyzed by immunohistochemistry. The expression of TGM-2 from fibroblasts cultured from OSF and normal buccal mucosa was evaluated by Western blot. The effect of arecoline on normal buccal mucosa fibroblasts (BMFs) was used to elucidate whether TGM-2 expression could be affected by arecoline by using 2', 7'-dichlorofluorescein diacetate assay and Western blot. In addition, glutathione precursor N-acetyl-l-cysteine (NAC) and epigallocatechin-3 gallate (EGCG) were added to find the possible regulatory mechanisms. TGM-2 expression was significantly higher in OSF specimens than normal specimens (p < 0.05). Fibroblasts derived from OSF were found to exhibit higher TGM-2 expression than BMFs in protein levels (p < 0.05). Arecoline significantly upregulated the intracellular ROS generation in a dose-dependent manner (p < 0.05). TGM-2 protein induced by arecoline was found in BMFs in a dose-dependent manner (p < 0.05). Treatment with NAC and EGCG markedly inhibited TGM-2 expression induced by arecoline (p < 0.05). Our results suggest that TGM-2 expression is significantly upregulated in OSF tissues from areca quid chewers. Arecoline-upregulated TGM-2 expression may be mediated by ROS generation. TGM-2 protein is upregulated in areca quid chewing-associated OSF. Using this in vitro model, antioxidants could inhibit arecoline-upregulated TGM-2 expression. NAC and EGCG may serve as a useful agent in controlling OSF.
引用
收藏
页码:1029 / 1034
页数:6
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