口腔医学研究 ›› 2019, Vol. 35 ›› Issue (7): 661-665.DOI: 10.13701/j.cnki.kqyxyj.2019.07.011

• 口腔黏膜学研究 • 上一篇    下一篇

二甲双胍对大鼠口腔黏膜溃疡的疗效之组织学评价

梁兆佳, 贺嘉忻#, 陈紫韵, 熊小琴, 霍昌宝, 林池灏, 刘晓明, 张君伟, 余挺*   

  1. 广州医科大学附属口腔医院·广州口腔疾病研究所·口腔医学重点实验室 广东 广州 510140
  • 收稿日期:2018-11-05 出版日期:2019-07-25 发布日期:2019-07-24
  • 通讯作者: 余挺,E-mail:dent_yu@163.com
  • 作者简介:梁兆佳(1999~ ),男,广东南海人,学士,从事口腔黏膜病相关研究。贺嘉忻(1996~ ),男,广东台山人,学士,从事牙周病相关研究
  • 基金资助:
    广州医科大学大学生实验室开放项目(C195015024) 大学生科技创新项目(2017A069、2018C051) 国家级大学生创新创业训练计划(201810570016) 国家自然科学基金(81700985)

Therapeutic Potentials of Metformin in Management of Oral Mucosal Ulcer in Rats: a Histological Study

LIANG Zhaojia, HE Jiaxin#, CHEN Ziyun, XIONG Xiaoqin, HUO Changbao, LIN Chihao, LIU Xiaoming, ZHANG Junwei, YU Ting*   

  1. Key Laboratory of Oral Medicine,Guangzhou Institute of Oral Disease,Stomatology Hospital of Guangzhou Medical University,Guangzhou 510140, China.
  • Received:2018-11-05 Online:2019-07-25 Published:2019-07-24

摘要: 目的:探索二甲双胍(MET)对口腔黏膜溃疡(OMU)的疗效。方法:创伤法在SD大鼠(n=24)两侧颊黏膜建立OMU模型。24 h后(d1),左侧(MET侧)溃疡基底每天注射20 μmol/L MET溶液,右侧(对照侧)注射生理盐水,记录溃疡面积。d2、d4、d7分别处死8只,行溃疡组织切片染色,分析新生上皮厚度和比例、结缔组织炎细胞数和胶原纤维含量。结果:d1时,同侧溃疡面积均匀,两侧面积等大(P=0.935)。d2~d7,溃疡面积不断缩小(P<0.05),胶原纤维含量和新生上皮厚度不断上升;炎细胞数于d2~d4上升,d4~d7下降(P<0.05)。d2~d5,MET侧溃疡面积小于对照侧16%~37%(P<0.05),d6~d7则不显著。d1~d7,MET侧炎细胞数小于对照侧(P<0.05)。d2~d4,MET侧胶原纤维含量和新生上皮厚度高于对照侧(P<0.05),此优势在d4~d7不再显著。结论:MET对早期OMU有明显改善作用,可能与抑制炎症,促进组织修复有关

关键词: 二甲双胍, 口腔溃疡, 组织学, 上皮, 愈合

Abstract: Objective: To explore the effects of metformin (MET) on oral mucosal ulcer (OMU). Methods: OMU models were established with trauma at bilateral buccal mucosa in SD rats (n=24). After 24 hours (d1), 20 μmol/L MET solution was injected into the ulcer base of left side (MET side) one time per day, with normal saline injected into the right side as the control. The rats were sacrificed at d2, d4, and d7, 8 rats for each time point. Ulcer size was recorded every day. Thickness and proportion of new epithelium, inflammatory cell number in connective tissue, and collagen fiber content were analyzed. Results: At d1, ulcer size showed good consistency within the same sides and between the bilateral sides (P=0.935). From d2 to d7, ulcer size was reduced (P<0.05) and collagen fiber content and thickness of new epithelium were increased persistently. Inflammatory cell number was increased from d2 to d4 and then decreased from d4 to d7 (P<0.05). Ulcer size was 16% to 37% smaller at MET side from d2 to d5 than that of control side (P<0.05), which was comparable bilaterally from d6 to d7. Inflammatory cell number was down regulated from d1 to d7 at MET side relative to that of control side (P<0.05). Collagen fiber content and thickness of new epithelium was upregulated at MET side from d2 to d4 compared with those at control side (P<0.05), which showed no difference bilaterally from d4 to d7. Conclusion: MET shows significant improving effect on OMU at early stages, which might relate to the inflammatory inhibition and reparative promotion

Key words: metformin, oral ulcer, histology , epithelium healing