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Metformin alleviates junctional epithelium senescence via the AMPK/SIRT1/autophagy pathway in periodontitis induced by hyperglycemia.
Ye, Xiaoyuan; Wang, Yumin; Tian, Yanying; Bi, Ruonan; Li, Mingyue; Yang, Chunyan; Zhang, Li; Gao, Yuguang.
Afiliación
  • Ye X; Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256699, Shandong, China.
  • Wang Y; Institute of Stomatology, Binzhou Medical University, Yantai, 264003, Shandong, China.
  • Tian Y; Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256699, Shandong, China.
  • Bi R; Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256699, Shandong, China.
  • Li M; Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256699, Shandong, China.
  • Yang C; Institute of Stomatology, Binzhou Medical University, Yantai, 264003, Shandong, China.
  • Zhang L; Institute of Stomatology, Binzhou Medical University, Yantai, 264003, Shandong, China.
  • Gao Y; Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256699, Shandong, China.
Heliyon ; 10(6): e27478, 2024 Mar 30.
Article en En | MEDLINE | ID: mdl-38496895
ABSTRACT
The junctional epithelium (JE) serves a crucial protective role in the periodontium. High glucose-related aging results in accelerated barrier dysfunction of the gingival epithelium, which may be associated with diabetic periodontitis. Metformin, an oral hypoglycemic therapeutic, has been proposed as a anti-aging agent. This study aimed to clarify the effect of metformin on diabetic periodontitis and explore its mechanism in ameliorating senescence of JE during hyperglycemia. The db/db mice was used as a diabetic model mice and alterations in the periodontium were observed by hematoxylin-eosin staining and immunohistochemistry. An ameloblast-like cell line (ALC) was cultured with high glucose to induce senescence. Cellular senescence and oxidative stress were evaluated by SA-ß-gal staining and Intracellular reactive oxygen species (ROS) levels. Senescence biomarkers, P21 and P53, and autophagy markers, LC3-II/LC3-I, were measured by western blotting and quantitative real-time PCR. To construct a stable SIRT1 (Sirtuin 1) overexpression cell line, we transfected ALCs with lentiviral vectors overexpressing the mouse SIRT1 gene. Cellular senescence was increased in the JE of db/db mice and the periodontium was destroyed, which could be alleviated by metformin. Moreover, oxidative stress and cellular senescence in a high glucose environment were reduced by metformin in in-vitro assays. The autophagy inhibitor 3-MA and SIRT1 inhibitor EX-527 could dampen the effects of metformin. Overexpression of SIRT1 resulted in increased autophagy and decreased oxidative stress and cellular senescence. Meanwhile, AMPK (AMP-activated protein kinase) inhibition reversed the anti-senescence effects of metformin. Overall, these results suggest that metformin alleviates periodontal damage in db/db mice and cellular senescence in ALCs under high glucose conditions via the AMPK/SIRT1/autophagy pathway.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Heliyon Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Heliyon Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido