Chinese Journal of Tissue Engineering Research ›› 2023, Vol. 27 ›› Issue (14): 2158-2163.doi: 10.12307/2023.120

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Protective effect of astragaloside IV against inflammatory injury in chondrocytes

Liao Jianzhao1, Yang Nan1, Zhou Yi1, Xu Hang1, Xia Tian1, Song Shilei1, Zeng Qi1, Chen Yueping2   

  1. 1Graduate School, Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; 2Department of Traumatology and Hand Surgery, Ruikang Hospital, Guangxi University of Chinese Medicine, Nanning 530011, Guangxi Zhuang Autonomous Region, China
  • Received:2022-03-07 Accepted:2022-05-06 Online:2023-05-18 Published:2022-09-30
  • Contact: Chen Yueping, Chief physician, Doctoral supervisor, Department of Traumatology and Hand Surgery, Ruikang Hospital, Guangxi University of Chinese Medicine, Nanning 530011, Guangxi Zhuang Autonomous Region, China
  • About author:Liao Jianzhao, Master candidate, Graduate School, Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81960803 (to CYP); First-class Discipline Construction Open Topic of Guangxi University of Chinese Medicine, No. 2019XK026 (to CYP); Guangxi Postgraduate Education Innovation Program, Nos. YCSW2021219 (to LJZ) and YCSY2020080 (to ZY); Guangxi Zhuang Autonomous Region Clinical Key Specialty (Trauma Surgery) Construction Project, No. 2021 (to CYP); Guangxi Zhuang Autonomous Region Key Health Care Discipline (Emergency Medicine), No. [2021]8 (to CYP)

Abstract: BACKGROUND: Cartilage lesions are the key to the occurrence and development of osteoarthritis. Exploring the function of chondrocytes and developing drugs for chondrocyte protection and pro-secretion of type II collagen are important means to clinically cure osteoarthritis. 
OBJECTIVE: To explore the protective effect of astragaloside IV (AS-IV) on interleukin-1β-induced inflammation of chondrocytes and to explore whether the Hippo-YAP pathway is involved in this effect and its potential mechanism.  
METHODS: Chondrocytes from the tibia and femur of Sprague-Dawley rats were isolated and cultured. Chondrocytes in the logarithmic growth phase were divided into five groups: blank group in which the cells were routinely cultured, model group in which the cells were treated with interleukin-1β to induce inflammatory injury in chondrocytes, astragaloside IV group in which the cells were treated with interleukin-1β + astragaloside IV, NC-siRNA group in which the cells were transfected with NC-siRNA + interleukin-1β + astragaloside IV, YAP1-siRNA group in which the cells were transfected with YAP1-siRNA+interleukin-1β+astragaloside IV. Relevant measurements were performed after 48 hours of culture.
RESULTS AND CONCLUSION: The cell viability was significantly lower in the model group than the blank group (P < 0.05), significantly higher in the astragaloside IV, NC-siRNA, and YAP1-siRNA groups than the model group (P < 0.05), and significantly higher in the YAP1-siRNA group than the NC-siRNA group (P < 0.05). The apoptotic rate was significantly higher in the model group than the blank group (P < 0.05), significantly lower in the astragaloside IV, NC-siRNA, and YAP1-siRNA transfection groups than the model group (P < 0.05), and significantly lower in the YAP1-siRNA group than the NC-siRNA group (P < 0.05). RT-qRCR results showed that compared with the blank group, the mRNA expressions of metalloproteinase 1 and tissue inhibitor of metalloproteinase 1 were significantly higher in the model group (P < 0.05), while the mRNA expressions of YAP1 and TEAD1 were significantly lower in the model group (P < 0.05). The mRNA expression of YAP1 in the astragaloside IV group was significantly higher than that in the model group (P < 0.05). Compared with the NC-siRNA group, the mRNA expressions of metalloproteinase 1 and tissue inhibitor of metalloproteinase 1 were significantly higher in the YAP1-siRNA group (P < 0.05), while the mRNA expressions of YAP1 and TEAD1 were significantly lower in the YAP1-siRNA group (P < 0.05). Western blot results revealed that compared with the blank group, the protein expressions of metalloproteinase 1, tissue inhibitor of metalloproteinase 1, and YAP1 were significantly higher in the model group (P < 0.05), while the protein expressions of type II collagen, TEAD1, and p-YAP1 were significantly lower in the model group (P < 0.05). Compared with the NC-siRNA group, the protein expressions of metalloproteinase 1 and tissue inhibitor of metalloproteinase 1 were significantly higher in the YAP1-siRNA group (P < 0.05), while the protein expressions of type II collagen, TEAD1, and p-YAP1 were significantly lower in the YAP1-siRNA group (P < 0.05). To conclude, astragaloside IV has a protective effect on interleukin-1β-induced inflammation of chondrocytes, which may be related to the Hippo-YAP pathway.

Key words: osteoarthritis, chondrocyte, astragaloside IV, Hippo-YAP, interleukin-1β, type II collagen

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