Chinese Journal of Tissue Engineering Research ›› 2023, Vol. 27 ›› Issue (35): 5670-5675.doi: 10.12307/2023.854

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Mechanism of Mongolian Medicine Erden-uril on avascular necrosis of the femoral head in rats

Jin Hongguang1, 2, Shi Zhuang1, Wang Huaxin1, Ni Ma2, Fu Yong2   

  1. 1Affiliated Hospital of Inner Mongolia University for Nationalities, Tongliao 028005, Inner Mongolia Autonomous Region, China; 2Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, Jiangxi Province, China
  • Received:2022-10-25 Accepted:2022-12-13 Online:2023-12-18 Published:2023-06-05
  • Contact: Fu Yong, MD, Professor, Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, Jiangxi Province, China
  • About author:Jin Hongguang, Master, Associate chief physician, Affiliated Hospital of Inner Mongolia University for Nationalities, Tongliao 028005, Inner Mongolia Autonomous Region, China; Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, Jiangxi Province, China

Abstract: BACKGROUND: Steroid-induced avascular necrosis of the femoral head is a complication of bilateral osteonecrosis of the femoral head caused by steroid treatment with a high disability rate, but the therapeutic effect is not significant. Erden-uril is a precious Mongolian medicine prescription, mainly used to prevent and treat bone and joint diseases, but its mechanism of improving steroid-induced avascular necrosis of the femoral head is still unclear.
OBJECTIVE: To study the action mechanism of Mongolian Medicine Erden-uril on steroid-induced avascular necrosis of the femoral head in rat.
METHODS: Fifty rats were randomly divided into normal group, model group, low-dose Erden-uril group (0.1 g/kg Erden-uril by gavage), high-dose Erden-uril group (0.4 g/kg Erden-uril by gavage) and alendronate sodium group. Except for the normal group, rats in the other groups were intraperitoneally injected with 10 μg/kg lipopolysaccharide and 20 mg/kg methylprednisolone to establish animal models of steroid-induced avascular necrosis of the femoral head. Administration by gavage in each group was performed once a day for 6 weeks. Subsequently, hematoxylin-eosin staining was used to evaluate the femoral head necrosis model; TUNEL method was used to detect apoptosis in femoral head tissue; ELISA and immunohistochemistry were used to detect the expression levels of pro-apoptotic protein Bax and anti-apoptotic protein Bcl-2 in femoral head tissue; and western blot method was used to detect the protein expression of ATG5, Beclin-1, LC3II, Caspase-3, Bax and Bcl-2 in femoral head tissue.
RESULTS AND CONCLUSION: Compared with the normal group, the number of empty bone lacunae was significantly increased, and adipocytes were enlarged and increased in the model group; the expression of Bax increased significantly and that of ATG5, Beclin-1, LC3II and Bcl-2 decreased significantly in the model group. Compared with the model group, treatment with Mongolian medicine Erdun-uril could significantly reduce the number of empty bone lacunae and the amount of adipocytes, significantly increase the number of bone marrow cells, and significantly decrease the number of apoptotic cells. Compared with the model group, all methods showed significant down-regulation of Bax and Caspase-3 expression and significant up-regulation of ATG5, Beclin-1, LC3II and Bcl-2 expression after treatment with low and high doses of Erdun-uril, except for western blot detection, which showed significant up-regulation of Bax expression after treatment with low-dose Erdun-uril. Moreover, there was no significant difference in protein expression between low- and high-dose Erdun-uril groups. To conclude, Erdun-uril may protect avascular necrosis of the femoral head induced by lipopolysaccharide combined with methylprednisolone in rats by promoting autophagy with anti-apoptotic effects. 

Key words: Mongolian medicine, Erdun-uril, steroid-induced avascular necrosis of the femoral head, apoptosis, autophagy

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