Knockdown of SNHG1 alleviates autophagy and apoptosis by regulating miR-362-3p/Jak2/stat3 pathway in LPS-injured PC12 cells

Neurochemical Research (2021)Cite this article

Abstract

Spinal cord injury (SCI) is a serious neurological disease. Long non-coding RNA (lncRNA) small nucleolar RNA host gene (SNHG1) and microRNA-362-3p (miR-362-3p) were confirmed to be related to neurological disorders. However, it is unclear whether SNHG1 was involved in the development of SCI via regulating miR-362-3p. PC12 cells were treated with lipopolysaccharide (LPS) to imitate the in vitro cell model of SCI. Cell ciability and apoptosis rate were detected by cell counting kit-8 (CCK-8) assay and flow cytometry assay. The levels of SNHG1, miR-362-3p, and Janus kinase-2 (Jak2) were examined by quantitative real-time polymerase chain reaction (qRT-PCR). The dual-luciferase reporter assay, RNA pull-down assay, and RNA immunoprecipitation (RIP) assay were performed to verify the interaction between miR-362-3p and SNHG1 or Jak2. Besides, the levels of apoptosis- and autophagy- related proteins were detected by western blot assay. In present research, LPS suppressed cell viability, and induced apoptosis and autophagy in PC12 cells. SNHG1 knockdown could affect cell viability, and suppress cell apoptosis and autophagy in LPS-treated PC12 cells. Moreover, miR-362-3p was a target of SNHG1, miR-362-3p targeted Jak2 and negatively regulated Jak2/stat3 pathway. Our data also demonstrated that SNHG1 depletion inactivated Jak2/stat3 pathway to affect cell viability and confine apoptosis, autophagy in LPS-treated PC12 cells. Taken together, SNHG1 regulated cell viability, apoptosis and autophagy in LPS-treated PC12 cells by activating Jak2/stat3 pathway via sponging miR-362-3p.

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Acknowledgements

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Funding

This study was supported by grant from the Science Foundation of Xiangya Hospital for Young Scholar (No. 2017Q1) and the Natural Science Foundation of Hunan Province (No. 2019JJ50959).

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Affiliations

  1. Department of Orthopaedic, The Third Xiangya Hospital of Central South University, Changsha, 410008, Hunan, China

    Jiahui Zhou, Zhiyue Li, Qun Zhao & Qiancheng Zhao

  2. Department of Orthopaedic, Xiangya Hospital Central South University, Changsha, 410008, Hunan, China

    Tianding Wu & Yong Cao

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  1. Jiahui Zhou
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  2. Zhiyue Li
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Supplementary material 1 (TIF 43 kb)The effect of SNHG1 knockdown, miR-362-3p inhibitor or Jak2 overexpression on cell viability in PC12 cells. (A-C) Cells were transfected with si-SNHG1, anti-miR-362-3p or Jak2 overexpression plasmids, and cell viability was detected by CCK-8 assay in PC12 cells without treatment of LPS. Student’s t-test was performed for statistical analysis.

Supplementary material 2 (TIF 85 kb)Relative expression levels of VEGFA, FZD5, ADAM19, HOXA5, HMGA2, JAK2, RUNX1, and ROCK2 were detected by qRT-PCR. Student’s t-test was performed for statistical analysis.

Supplementary material 3 (TIF 97 kb)The enrichment of Jak2 in LPS-treated PC12 cells transfected with Bio- NC or Bio-SNHG1 was assessed by RNA pull-down assay. Student’s t-test was performed for statistical analysis.

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Zhou, J., Li, Z., Zhao, Q. et al. Knockdown of SNHG1 alleviates autophagy and apoptosis by regulating miR-362-3p/Jak2/stat3 pathway in LPS-injured PC12 cells. Neurochem Res (2021). https://doi.org/10.1007/s11064-020-03224-7

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Keywords

  • SNHG1
  • miR-362-3p
  • Jak2/stat3 signaling pathway
  • SCI