Journal of Jilin University(Medicine Edition) ›› 2024, Vol. 50 ›› Issue (6): 1547-1556.doi: 10.13481/j.1671-587X.20240608

• Research in basic medicine • Previous Articles    

Therapeutic effect of resveratrol on osteoarthritis of temporomandibular joint and its mechanism

Gao SUN1,2,Jing HE1,Qi ZHAO1,Jianhong SHI1,Zhiling LIAO1,Yuanye TIAN1,Guomin WU1()   

  1. 1.Department of Oral and Maxillofacial Surgery Ⅰand Oral Plastic Surgery,Stomatology Hospital,Jilin University,Changchun 130021,China
    2.Jilin Provincal Key Laboratory of Tooth Development and Bone Remodeling and Regeneration,Stomatology Hospital,Jilin University,Changchun 130021,China
  • Received:2023-11-14 Online:2024-11-28 Published:2024-12-10
  • Contact: Guomin WU E-mail:guominwu2006@sina.com

Abstract:

Objective To discuss the therapeutic effect of resveratrol on the temporomandibular joint osteoarthritis (TMJOA), and to clarify the related mechanism. Methods Forty-five SD rats were randomly divided into control group, model group, and resveratrol group, and there were 15 rats in each group. The rats in model group and resveratrol group were intra-articularly injected with 50 μL of 20 g·L-1 monosodium iodoacetate (MIA) to set TMJOA rat models, while the rats in control group were injected with an equal volume of normal saline. Three weeks after modeling, the rats in resveratrol group received an injection of 80 μL resveratrol solution, once a week for three weeks, while the rats in control and model groups were injected with an equal volume of normal saline. Micro-computed tomography (Micro-CT) system was used to detect the condyle structure and the bone volume fraction (BV/TV), trabecular thickness (Tb.Th), trabecular spacing (Tb.Sp), and trabecular number (Tb.N) of the rats in various groups were calculated; HE staining and toluidine blue staining were used to observe the pathomorphology of temporomandibular joint (TMJ) tissue of the rats in various groups; immunohistochemistry was used to detect the expression levels of SRY-related HMG box (SOX)-9, matrix metalloproteinase (MMP)-13, silent information regulator (Sirt)1, phosphatidylinositol 3-kinase (PI3K), phosphorylated protein kinase B (p-Akt), and phosphorylated mammalian target of rapamycin (p-mTOR) in TMJ tissue of the rats in various groups; real-time quantitative PCR (RT-qPCR) method was used to detect the expression levels of SOX-9, MMP-13, Sirt1, PI3K, mTOR, and Akt mRNA in TMJ tissue of the rats in various groups. Results Three weeks after modeling, condylar bone was destructed, the surface was roughness, and continuity interruption were observed, indicating TMJOA model of the rats was established successfully. The Micro-CT system results showed that the condylar surface of the rats in control group was smooth and regularly shaped, with continuous bone texture; the rats in model group had significant condylar destruction, disrupted continuity, surface roughness, and varying degrees of bone defects; the rats in resveratrol group showed alleviated condylar lesions and improved appearance. Compared with control group, the BV/TV and Tb.Th of the rats in model group were significantly decreased (P<0.05), and Tb.Sp was significantly increased (P<0.05); compared with model group, the BV/TV and Tb.Th of the rats in resveratrol group were significantly increased (P<0.05), and the Tb.Sp was significantly decreased (P<0.05). The HE staining results showed clear layers and orderly chondrocyte arrangement in condyle of the rats in control group; the rats in model group showed rough uneven surface, obvious defects, and typical TMJOA features; the rats in resveratrol group showed slightly rough surface with generally clear layers and orderly arranged cells. The toluidine blue staining results showed distinct blue-purple staining of chondrocytes in hypertrophic layer of the rats in control group; pale staining or even loss of staining in some areas of the rats in model group; and distinct and relatively uniform staining in hypertrophic layer of the rats in resveratrol group. The immunohistochemistry results showed that compared with control group, the expression levels of MMP-13, PI3K, p-Akt, and p-mTOR proteins in TMJ tissue of the rats in model group were significantly increased (P<0.05), while the expression levels of SOX-9 and Sirt1 proteins in TMJ tissue of the rats were significantly decreased (P<0.05); compared with model group, the expression levels of SOX-9 and Sirt1 proteins in TMJ tissue of the rats in resveratrol group were significantly increased (P<0.05), whereas the expression levels of MMP-13, PI3K, p-Akt, and p-mTOR proteins were significantly decreased (P<0.05).The RT-qPCR results showed that compared with control group, the expression levels of MMP-13, PI3K, Akt, and mTOR mRNA in TMJ tissue of the rats in model group were significantly increased (P<0.05), while the expression levels of SOX-9 and Sirt1 mRNA were significantly decreased (P<0.05); compared with model group, the expression levels of SOX-9 and Sirt1 mRNA in TMJ tissue of the rats in resveratrol group were significantly increased (P<0.05), whereas the expression levels of MMP-13, PI3K, Akt, and mTOR mRNA were significantly decreased (P<0.05). Conclusion Resveratrol has therapeutic effect on TMJOA, and its mechanism may be related to the activation of Sirt1 and inhibition of the PI3K-Akt-mTOR signaling pathway.

Key words: Resveratrol, Temporomandibular joint osteoarthritis, Silence information regulation 1, Phosphoinositide 3-kinase, Protein kinase B, Mammalian target of rapamycin

CLC Number: 

  • R684.3