Fan Mingyu,Bian Feng,Zhou Shaohuai,et al.Effect of andrographolide on TBHP-induced apoptosis of intervertebral disc nucleus pulposus cells and its mechanism[J].Journal of Chongqing Medical University,2023,48(7):777-783.
Fan Mingyu,Bian Feng,Zhou Shaohuai,et al.Effect of andrographolide on TBHP-induced apoptosis of intervertebral disc nucleus pulposus cells and its mechanism[J].Journal of Chongqing Medical University,2023,48(7):777-783. DOI: 10.13406/j.cnki.cyxb.003282.
Effect of andrographolide on TBHP-induced apoptosis of intervertebral disc nucleus pulposus cells and its mechanism
To investigate the effect and mechanism of andrographolide(ANDRO) on intervertebral disc nucleus pulposus cell(NPC) apoptosis induced by tert-butyl hydroperoxide(TBHP).
Methods
2
The cell model of NPCs induced by TBHP was established. NPCs were divided into five groups: control group,model group(100 μmol/L TBHP),low-dose ANDRO group(100 μmol/L TBHP+9 μmol/L ANDRO),middle-dose ANDRO group(100 μmol/L TBHP+18 μmol/L ANDRO),and high-dose ANDRO group(100 μmol/L TBHP+36 μmol/L ANDRO). Cell apoptosis and reactive oxygen species(ROS) levels were determined by flow cytometry. The levels of oxidative stress related indicators,such as superoxide dismutase(SOD),glutathione peroxidase(GSH-PX),and catalase(CAT),were determined by an enzyme-linked immunosorbent assay kit. Mitochondrial membrane potential was measured by a JC-1 probe. Western blot was used to determine the expression levels of dynamin-related protein 1(Drp1),phosphorylated Drp1(p-Drp1),and mitofusin 2(Mfn2).
Results
2
Compared with the control group,the model group had significantly increased apoptosis rate of NPCs,ROS level,and proportion of cells with decreased mitochondrial membrane potential(all
=0.000),and significantly down-regulated protein expression of Mfn2(
P
=0.000). Compared with the model group,the high-dose ANDRO group had significantly decreased apoptosis rate of NPCs[(41.37±0.84)% vs.(26.36±1.33)%],ROS level[(42.62±0.71)% vs.(22.50±0.37)%],and proportion of cells with decreased mitochondrial membrane potential[(43.85±0.71)% vs.(24.96±1.04)%](all
=0.001,0.000),and significantly up-regulated protein expression of Mfn2(0.39±0.01 vs. 0.64±0.02)(all
P
=0.000).
Conclusion
2
ANDRO can inhibit TBHP-induced NPC apoptosis,and the mechanism may be related to the regulation of mitochondrial function and the relief of oxidative stress.
关键词
Keywords
references
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