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Interleukin-17A Promotes Human Disc Degeneration by Inhibiting Autophagy Through the Activation of the Phosphatidylinositol 3-Kinase/Akt/Bcl2 Signaling Pathway.

Abstract：

BACKGROUND:Previous studies have suggested that interleukin (IL)-17A is a key factor that contributes to intervertebral disc degeneration (IDD), whereas autophagy has been shown to be a protective mechanism in IDD. However, the relationship between IL-17A and autophagy in IDD remains to be fully elucidated. This study sought to evaluate the association between IL-17 and autophagy and the potential mechanism through which IL-17A affects autophagy in IDD. METHODS:Intervertebral disc specimens were collected from 10 patients with lumbar disc herniation. Human degenerated nucleus pulposus (NP) cells were cultured in the presence or absence of IL-17A treatment. Western blot and monodansylcadaverine staining were used to measure autophagy levels in human degenerated NP cells. Subsequently, phosphatidylinositol 3-kinase (PI3K)/Akt/Bcl-2 pathway inhibitors were used to reveal the potential mechanism. RESULTS:IL-17A treatment inhibited the autophagic activity in human NP cells in a time- and dose-dependent manner. Moreover, monodansylcadaverine staining showed that cells treated with IL-17A had significantly fewer changes in their autophagic vacuoles compared with control-treated cells. After IL-17A treatment, expression levels of PI3K, p-Akt, and Bcl-2 in NP cells were significantly increased. Further assays with PI3K/Akt/Bcl-2 inhibitors revealed that IL-17A suppressed autophagy in NP cells by activating the PI3K/Akt/Bcl-2 signaling pathway. CONCLUSIONS:These data suggest that IL-17A promotes IDD by inhibiting autophagy through activation of the PI3K/Akt/Bcl-2 signaling pathway and may offer new insights for targeted therapy of this disease.

journal_name

World Neurosurg

journal_title

World neurosurgery

authors

He WS,Zou MX,Yan YG,Yao NZ,Chen WK,Li Z,Wang WJ,Ouyang ZH

doi

10.1016/j.wneu.2020.07.117

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

e215-e223

eissn

1878-8750

issn

1878-8769

pii

S1878-8750(20)31638-7

journal_volume

143

pub_type

杂志文章

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