Tianjin Medical Journal ›› 2023, Vol. 51 ›› Issue (7): 718-723.doi: 10.11958/20221441

• Cell and Molecular Biology • Previous Articles     Next Articles

Protective mechanism of catalpol on IL-1β-induced chondrocyte injury

MA Ling(), ZHONG Liguo, CUI Yuru, LIU Bin   

  1. The First People's Hospital of Jingzhou/The First Affiliated Hospital of Yangtze University, Jingzhou 434000, China
  • Received:2022-09-07 Revised:2022-12-23 Published:2023-07-15 Online:2023-07-18

Abstract:

Objective To investigate the effect of catalpol on interleukin-1β (IL-1β)-induced chondrocyte injury and its possible mechanism. Methods Human knee joint chondrocytes were isolated, cultured and divided into the control (Con) group, the IL-1β group (treated with 10 μg/L IL-1β for 48 h), the IL-1β+catalpol-low group, the IL-1β+catalpol -medium group, the IL-1β+catalpol -high group (treated with 10, 20 and 50 ng/L catalpol and then treated with 10 μg/L IL-1β for 24 h), the IL-1β+miR-NC group (transfected with miR-NC, treated with 10 μg/L IL-1β for 24 h), the IL-1β+miR-140-5p group (transfected with miR-140-5p mimics, treated with 10 μg/L IL-1β for 24 h), the IL-1β+catalpol+anti-miR-NC group (after transfection with anti-miR-NC, treated with 50 ng/L catalpol and 10 μg/L IL-1β for 24 h) and the IL-1β+catalpol+anti-miR-140-5p group (transfected with anti-miR-140-5p, treated with 50 ng/L catalpol and 10 μg/L IL-1β for 24 h). Cell viability was detected by cell count Kit 8 (CCK-8 method). Levels of interleukin-6 (IL-6), tumor necrosis factor α (TNF-α) and interferon γ (IFN-γ) were detected by enzyme-linked immunosorbent assay (ELISA). The apoptosis rate was detected by flow cytometry. The expression of miR-140-5p was detected by real-time quantitative fluorescence PCR (qPCR). Expression levels of cleaved aspartate specific cysteine proteinase (Cleaved-caspase) 3 and Cleaved-caspase 9 were detected by Western blot assay. Results Compared with the IL-1β group, levels of IL-6, TNF-α, IFN-γ, cell apoptosis rate, Cleaved-caspase 3 and Cleaved-caspase 9 protein expression levels were decreased in the IL-1β+catalpol-low group, the IL-1β+catalpol-medium group and the IL-1β+catalpol-high group, but cell viability and miR-140-5p expression were increased (P<0.05). Compared with the IL-1β+miR-NC group, levels of IL-6, TNF-α, IFN-γ, cell apoptosis rate, Cleaved-caspase 3 and Cleaved-caspase 9 protein expression levels were decreased in the IL-1β+miR-140-5p group (P<0.05), and cell viability and miR-140-5p were increased (P<0.05). Compared with the IL-1β+catalpol +anti-miR-NC group, levels of IL-6, TNF-α, IFN-γ, cell apoptosis rate, Cleaved-caspase 3 and Cleaved-caspase 9 protein expression levels were increased in the IL-1β+ catalpol+anti-miR-140-5p group (P<0.05), and cell viability was decreased (P<0.05). Conclusion Catalpol may reduce IL-1β-induced chondrocyte injury by up-regulating the expression of miR-140-5p, inhibiting the release of cellular inflammatory factors and apoptosis.

Key words: knee joint, cartilage, articular, catalpol, apoptosis, miR-140-5p, inflammatory factor

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