Journal of Jilin University(Medicine Edition) ›› 2021, Vol. 47 ›› Issue (3): 595-607.doi: 10.13481/j.1671-587X.20210308

• Research in basic medicine • Previous Articles     Next Articles

Effect of isorhynchophylline on apoptosis and release of inflammatory factors in human bronchial epithelial cells induced by TNF-α via up-regulating miR-192-5p and its mechanism

Congling HOU(),Xiaofan LU,Xiaoting LEI,Bin LI,Runyang ZHAO   

  1. Department of Pulmonary Diseases,Henan Provincial Hospital of Traditional Chinese Medicine,Zhengzhou 450002,China
  • Received:2020-10-19 Online:2021-05-28 Published:2021-05-28
  • Contact: Congling HOU E-mail:xbhhyper@sina.com

Abstract: Objective

To observe the effect of isorhynchophylline (IRN) on TNF-α-induced the apoptosis and the release of inflammatory factors in the human bronchial epithelial (16HBE) cells, and to explore its possible mechanism.

Methods

After treated with different concentrations[0(control group),2.5, 5.0, 10.0, 20.0, 30.0 and 40.0 μmol·L-1] of IRN for 24 h, the 16HBE cells were cultured with 20 mg·L-1 TNF-α for 18 h. The 16HBE cells were divided into control group, TNF-α group (20 mg·L-1), IRN group (20 μmol·L-1), TNF-α+IRN group (20 mg·L-1 TNF-α and 20 μmol·L-1 IRN), TNF-α+IRN+miR-192-5p inhibitor group (20 mg·L-1 TNF-α, 20 μmol·L-1 IRN and 50 nmol·L-1 miR-192- 5p inhibitor) and TNF-α+IRN+pcDNA3.1 CXCR5 group [20 mg·L-1 TNF-α, 20 μmol·L-1 IRN and 2 μmol·L-1 pcDNA3.1-C-X-C chomokine receptor type 5(CXCR5)]. CCK-8 method was used to detect the viabilities of 16HBE cells in various groups; Real-time fluorescence quantitative PCR(RT-qPCR) method was used to detect the expression levels of miR-192-5p and CXCR5 mRNA in the 16HBE cells in various groups;Western blotting method was used to detect the expression levels of interleukins-1β (IL-1β)and monocyte chemoattactant protein-1 (MCP-1),B cell lymphoma-2(Bcl-2), Cleaved-Caspase 3, CXCR5, and phosphorylated p38(p-P38), c-Jun N-terminal kinase (JNK), c-Jun, and nuclear factor-κB (NF-κB) p65 proteins in the 16HBE cells in various groups; ELISA method was used to detect the levels of IL-1β and MCP-1 in supernatant of the 16HBE cells in various groups. TargetScan7.1 website was used to predict the target genes and the targeted binding association between miR-192-5p and CXCR5 was verified by dual-luciferase reporter gene assay.

Results

Compared with control group, the viability of the 16HBE cells in TNF-α group was significantly decreased (P<0.05);compared with control group, the viabilities of 16HBE cells in 5.0,10.0,20.0, and 30.0 μmol·L-1 IRN groups were increased (P<0.05). Compared with control group, the expression levels of miR-192-5p and Bcl-2 proteins in the 16HBE cells in TNF-α group were significantly decreased (P<0.05), the expression levels of IL-1β, MCP-1,Cleaved-Caspase-3, p-p38, p-JNK, p-c-Jun and p-NF-κB p65 proteins, the apoptotic rate and the levels of IL-1β and MCP-1 in supernatant of the 16HBE cells were significantly increased (P<0.05); compared with TNF-α group, the expression levels of miR-192-5p and Bcl-2 protein in the 16HBE cells in TNF-α+IRN group were significantly increased (P<0.05), the the expression levels of IL-1β, MCP-1,Cleaved-Caspase-3, p-p38, p-JNK, p-c-Jun and p-NF-κB p65 proteins, the apoptotic rate and the levels of IL-1β and MCP-1 in supernatant of the 16HBE cells were significantly decreased (P<0.05); compared with TNF-α+IRN+NC inhibitor group, the expression levels of miR-192-5p and Bcl-2 protein in the 16HBE cells in TNF-α+IRN+ miR-192-5p inhibitor group were significantly decreased (P<0.05),the expression levels of IL-1β, MCP-1,Cleaved-Caspase-3, p-p38, p-JNK, p-c-Jun and p-NF-κB p65 proteins,and the apoptotic rate and the levels of IL-1β and MCP-1 in supernatant of the 16HBE cells were significantly increased (P<0.05). Compared with NC mimic and NC inhibitor groups, the expression levels of CXCR5 mRNA and protein in the 16HBE cells in miR-192-5p mimic group were significantly decreased (P<0.05), and the expression levels of CXCR5 mRNA and protein in the 16HBE cells in miR-192-5p inhibitor group were significantly increased (P<0.05). Compared with control group, the expression level of CXCR5 protein in the 16HBE cells in TNF-α group was significantly increased (P<0.05), the cell viability was decreased (P<0.05), and the apoptotic rate and the levels of IL-1β and MCP-1 in supernatant of the 16HBE cells were increased (P<0.05);compared with TNF-α group, the expression level of CXCR5 protein in the 16HBE cells in TNF-α+IRN group was significantly decreased (P<0.05),the cell viability was increased (P<0.05),and the apoptotic rate and the levels of IL-1β and MCP-1 were significantly decreased (P<0.05); compared with TNF-α+IRN+ pcDNA3.1 group, the expression level of CXCR5 protein in the 16HBE cells in TNF-α+IRN+ pcDNA3.1 CXCR5 group was significantly increased (P<0.05),the cell viability was decreased (P<0.05),and the apoptotic rate and the levels of IL-1β and MCP-1 in supernatant of the 16HBE cells were increased (P<0.05).

Conclusion

IRN can reduce the TNF-α-induced apoptosis and release of inflammatory factors in the human bronchial epithelial cells, and its mechanism may be related to the miR-192-5p/MAPKs/NF-κB signal pathway.

Key words: isorhynchophylline, chronic obstructive pulmonary disease, human bronchial epithelial cells, miR-192-5p, C-X-C chemokine receptor type 5

CLC Number: 

  • Q71