Abstract
Intervertebral disc degeneration (IDD) is a natural problem linked to the inflammation. Higenamine exerts multiple pharmacological properties in inflammation-related disorders. Our study aimed to explore the function of higenamine on interleukin (IL)-1β-caused apoptosis of human nucleus pulposus cells (HNPCs). Cell apoptosis was investigated by TUNEL and flow cytometry. Apoptosis-related biomarkers were determined by qRT-PCR or Western blotting. The protein in the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling was measured by Western blotting. We found that higenamine showed little effect on cell apoptosis, but mitigated IL-1β-caused apoptosis in a dose-dependent pattern. Higenamine attenuated IL-1β-induced decrease of Bcl-2 and increase of Bax and cleaved caspase-3. Higenamine did not affect the reactive oxygen species (ROS) level and the PI3K/Akt signaling, but attenuated IL-1β-induced ROS production and inhibition of the PI3K/Akt signaling. IL-1β repressed the activation of the PI3K/Akt pathway, but ROS inhibition using N-acetylcysteine (NAC) rescued this pathway. The PI3K/Akt signaling suppression using LY294002 reversed the inhibitive effect of higenamine on IL-1β-caused apoptosis, and this effect was weakened by ROS inhibition. In conclusion, higenamine attenuates IL-1β-caused apoptosis of HNPCs via ROS-mediated PI3K/Akt pathway.
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XZ performed the experiments and drafted the paper. SL and ZC performed the experiments. LY, FL, and YL collected and analyzed the data. LH and XB designed the study.
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Zhu, X., Liu, S., Cao, Z. et al. Higenamine mitigates interleukin-1β-induced human nucleus pulposus cell apoptosis by ROS-mediated PI3K/Akt signaling. Mol Cell Biochem 476, 3889–3897 (2021). https://doi.org/10.1007/s11010-021-04197-z
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DOI: https://doi.org/10.1007/s11010-021-04197-z