MicroRNA-126 regulates macrophage polarization to prevent the resorption of alveolar bone in diabetic periodontitis

• Published in: Archives of oral biology 2023-06, Vol.150, p.105686-105686, Article 105686
• Main Authors: Li, Jiajun, Liu, Yue, Lai, Wen, Song, Liting, Deng, Jiayin, Li, Changyi, Jiang, Shaoyun
• Format: Article
• Language: English
• Subjects: Alveolar Bone Loss - pathology; Alveolar Bone Loss - prevention & control; Animals; Diabetes; Diabetes Mellitus; Glucose; Lipopolysaccharide; Lipopolysaccharides - metabolism; Lipopolysaccharides - pharmacology; Macrophages - metabolism; MEK/ERK kinase 2; Mice; MicroRNA-126; MicroRNAs - metabolism; NF-kappa B - metabolism; Periodontitis; Periodontitis - metabolism; Periodontitis - prevention & control; Porphyromonas gingivalis; Tumor Necrosis Factor-alpha - metabolism
• ISSN: 0003-9969; 1879-1506
• DOI: 10.1016/j.archoralbio.2023.105686

This study aims to investigate the effects of microRNA-126 (miR-126) on the macrophage polarization in vitro and alveolar bone resorption in vivo. The relationship between miR-126 and MEK/ERK kinase 2 (MEKK2) was confirmed by dual-luciferase reporter assay. Real-time quantitative polymerase chain reaction, enzyme-linked immunosorbent assay or Western blot was used to detect the changes of miR-126, inducible nitric oxide synthase (iNOS), arginase-1 (Arg-1), tumor necrosis factor (TNF)-α, interleukin (IL)-10, MEKK2 and MEKK2-related pathways: mitogen-activated protein kinase (MAPK) and nuclear factor kappa-B (NF-κB) in RAW264.7 macrophages challenged with Porphyromonas gingivalis (P. gingivalis) lipopolysaccharide (LPS) and/or high glucose and/or miR-126 mimic. In mice with diabetic periodontitis, the expressions of iNOS and Arg-1 in gingiva, and alveolar bone level were detected after miR-126 mimic injection. MiR-126 could directly bind with MEKK2 3′-untranslated region (UTR). MEKK2, phosphorylation of NF-κB and MAPK signaling proteins, TNF-α and iNOS increased (P