中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (23): 3692-3697.doi: 10.3969/j.issn.2095-4344.1315

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

脂联素干预糖尿病牙周炎模型小鼠牙周组织及血浆中的脂联素水平

杨  娜1,鲍萍萍2,雷  涛2   

  1.  (1天津市津南区咸水沽医院口腔科,天津市  300350;2南开大学附属口腔医院牙体牙髓科,天津市  300041)
  • 收稿日期:2019-02-03 出版日期:2019-08-18 发布日期:2019-08-18
  • 通讯作者: 鲍萍萍,南开大学附属口腔医院牙体牙髓科,天津市 300041
  • 作者简介:杨娜,女,1979年生,山西省绛县人,汉族,2002年山西医科大学毕业,主治医师,主要从事口腔科相关疾病的研究。

Adiponectin levels in plasma and periodontal tissue of mouse models of diabetic periodontitis treated by adiponectin 

Yang Na1, Bao Pingping2, Lei Tao2   

  1.  (1Department of Stomatology, Tianjin Jinnan District Xianshui Hospital, Tianjin 300350, China; 2Department of Endodontics, Hospital of Stomatology Affiliated to Nankai University, Tianjin 300041, China)
  • Received:2019-02-03 Online:2019-08-18 Published:2019-08-18
  • Contact: Bao Pingping, Department of Endodontics, Hospital of Stomatology Affiliated to Nankai University, Tianjin 300041, China
  • About author:Yang Na, Attending physician, Department of Stomatology, Tianjin Jinnan District Xianshui Hospital, Tianjin 300350, China

摘要:

文章快速阅读:

文题释义:

脂联素(Adiponectin/ADPN):是脂肪细胞分泌的一种内源性生物活性多肽或蛋白质,是一种胰岛素增敏激素,能改善小鼠的胰岛素抗性和动脉硬化症;对人体的研究发现,脂联素水平能预示2型糖尿病和冠心病的发展,并在临床试验表现出抗糖尿病、抗动脉粥样和炎症的潜力。
晚期糖基化终末产物(advanced glycationend products,AGEs):是过量的糖和蛋白质结合的产物,在体内有2个来源,一是过量的糖和蛋白质在体内合成晚期糖基化终末产物,二是通过进食将食物中存在的晚期糖基化终末产物摄入体内。晚期糖基化终末产物能够和身体的组织细胞相组合并破坏它们。目前的研究证明:晚期糖基化终末产物会加速人体的衰老和导致很多慢性退化型疾病的发生。
摘要
背景
:低水平表达的脂联素在牙周炎和糖尿病的发生与发展进程之中均发挥着明显的促进作用。
目的:探讨脂联素注射对糖尿病并发牙周炎病理模型小鼠的治疗作用及其机制。
方法:60只8周龄的昆明系小鼠,由北京维通利华动物实验技术有限公司提供。小鼠被平均随机分为3组,其中模型组和脂联素组中所有小鼠均接受一次性的链脲佐菌素腹腔注射从而建立小鼠糖尿病模型,于牙周结扎部位涂抹联合菌液以建立小鼠牙周炎模型。正常对照组和糖尿病牙周炎模型组小鼠每日1次接受1 mL生理盐水腹腔注射,脂联素组小鼠则每日接受1次15 μg/kg的脂联素腹腔注射。治疗持续6周,酶联免疫吸附法(ELISA)检测小鼠血清及牙周组织中脂联素的水平、血糖及血浆胰岛素的水平;观察小鼠的牙周探诊深度以及牙槽骨垂直吸收高度;苏木精-伊红染色检测牙周组织病理变化;TUNEL法检测牙龈上皮细胞凋亡水平变化,RT-PCR和Western blot检测RAGE、活性氧基因和蛋白表达。
结果与结论:①脂联素组小鼠的血清和牙周组织中的脂联素水平较正常对照组和模型组明显升高(P < 0.05);②脂联素组较模型组小鼠血糖水平明显降低(P < 0.05),血清胰岛素水平明显升高(P < 0.05);③脂联素组小鼠的牙周探诊深度和牙槽骨垂直吸收高度较模型组明显减轻,牙龈上皮细胞凋亡率也明显降低;④RAGE、活性氧基因和蛋白表达水平脂联素组较模型组明显减轻(P < 0.05);⑤结果说明,脂联素干预可以提高糖尿病牙周炎病理模型小鼠牙周组织及血浆的脂联素水平,并可以明显改善小鼠的血糖状态;减轻小鼠牙周组织的病理变化及牙周细胞的凋亡,此系通过调节RAGE-ROS信号通路发挥以上调节作用。

关键词: 脂联素, 糖尿病, 牙周炎, RAGE-ROS通路, 牙周组织, 牙周细胞, 凋亡, 组织构建

Abstract:

BACKGROUND: Low level of adiponectin plays a significant role in the occurrence and development of periodontitis and diabetes mellitus.
OBJECTIVE: To investigate the therapeutic effect of adiponectin injection on diabetic periodontitis model mice and its mechanism.
METHODS: Sixty 8-week old Kunming mice (provided by Beijing Weitong Lihua Animal Experimental Technology Co., Ltd.) were randomly divided into three groups: control group, model group and adiponectin group. The mice in the model and adiponectin groups received intraperitoneal injection of streptozotin to establish a mouse model of diabetes mellitus, and then the periodontitis model was established by applying the combined bacterial fluid to the ligation site. The mice in the control and model groups received intraperitoneal injection of 1 mL normal saline once daily, while adiponectin group received intraperitoneal injection of 15 μg/kg adiponectin once daily, for 6 consecutive weeks. The three experimental groups of mice were treated for 6 weeks, after which physiological and biochemical indicators were tested. The levels of adiponectin in serum and periodontal tissue, the blood sugar and plasma insulin levels were then detected by ELISA. The depth of periodontal examination and the vertical absorption of alveolar bone were observed. The pathological changes of periodontal tissue were detected by hematoxylin-eosin staining. The changes of apoptosis level of gingival epithelial cells were detected by TUNEL method. The expression levels of RAGE and reactive oxygen species mRNA and protein were detected by RT-PCR and western blot assay.
RESULTS AND CONCLUSION: (1) The levels of adiponectin in serum and periodontal tissue in the adiponectin group were significantly higher than those in the control and model groups (P < 0.05). (2) The blood sugar level in the adiponectin group was significantly lower than that in the model group (P < 0.05) and the serum insulin level was significantly increased (P < 0.05). (3) The depth of periodontal examination and vertical absorption of alveolar bone were decreased significantly in the adiponectin group compared with the model group, and the apoptotic rate of gingival epithelial cells was decreased significantly. (4) The expression levels of RAGE and reactive oxygen species mRNA and protein in the adiponectin group were significantly lower than those in the model group (P < 0.05). (5) These results suggest that adiponectin can improve the adiponectin level in periodontal tissue and plasma in the diabetic periodontitis model mice and can significantly improve the blood sugar status, and reduce the pathological changes of periodontal tissue and the apoptosis of periodontal cells possibly via regulating RAGE-ROS signaling pathway.

Key words:  adiponectin, diabetes mellitus, periodontitis, RAGE-ROS signaling pathway, periodontal tissue, periodontal cells, apoptosis, tissue construction

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