Chinese Journal of Clinical Anatomy ›› 2023, Vol. 41 ›› Issue (2): 162-171.doi: 10.13418/j.issn.1001-165x.2023.2.08

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Action mechanism of pinoresinol diglucoside on improving osteoporosis in mice based on Nrf2 pathway

Huang Xingxiang1, Zhong Chao2*, Ye Hua2, Xu Chunyi3, Liu Yunfei4, Jiang Lu4   

  1. 1. Clinical Medicine, School of Medicine, University of Electronic Science and Technology of China, Chengdu 611731, China;  2. Department of TCM Orthopedics,the Affiliated Hospital of University of Electronic Science and Technology of China (Sichuan Provincial People's Hospital), Chengdu 610072, China; 3. Department of Orthopedics,the Affiliated Hospital of University of Electronic Science and Technology of China (Sichuan Provincial People's Hospital), Chengdu 610072, China;  4. Department of Anesthesiology, the Affiliated Hospital of University of Electronic Science and Technology of China (Sichuan Provincial People's Hospital), Chengdu 610072, China 
  • Received:2021-11-27 Online:2023-03-25 Published:2023-04-11

Abstract: Objective    To analyze the action mechanism of pinoresinol diglucoside (PD) on improving osteoporosis.   Methods    The trabecular bone volume/total volume (BV/TV), average trabecular thickness (Tb.Th), average number of trabeculae (Tb.N) and average trabecular spacing (Tb.Sp) were analyzed by micro-CT. The damage of bone tissues was detected by HE staining. Number of bone cells/bone circumference (N.Ob/B.Pm), vacuole rate and osteoclast surface/bone surface (Ocs/BS) were analyzed by TRAP staining. The relative activities of alkaline phosphatase (ALP) and tartrate-resistant acid phosphatase (TRAP), levels of superoxide dismutase (SOD), malondialdehyde (MDA) and glutathione (GSH) were detected by ELISA. The expressions of Nuclear factor erythroid-2-related factor 2 (Nrf2) and HO-1 were detected by Western Blotting.     Results    Compared with sham operation group, bone loss was increased in model group, BV/TV, Tb.Th, Tb.N, N.Ob/B.Pm, relative activity of ALP, SOD, GSH, Nrf2 and HO-1 expression levels were significantly decreased, Tb.Sp, vacuole rate, Ocs/BS, relative activity of TRAP and MDA level were significantly increased (P<0.05). The changes in E2 group and PD group were completely opposite to those in model group (P<0.05). There was no significant difference in the above indexes between PD group and E2 group (P>0.05).    Conclusions   PD can improve osteoporosis in mice by activating Nrf2 signaling pathway. 

Key words: Pinoresinol diglucoside; ,  Osteoporosis; ,  Nuclear factor erythroid-2-related factor 2, Osteoblast; ,  , Osteoclast; ,  , Oxidative stress

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