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Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway

  • Authors:
    • Tao Pan
    • Fang Zhang
    • Fakai Li
    • Xingchun Gao
    • Zhikui Li
    • Xia Li
    • Xinling Ren
  • View Affiliations / Copyright

    Affiliations: Department of Respiratory Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China, Shaanxi Key Laboratory of Brain Disorders and Institute of Basic Medical Sciences and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China, The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
    Copyright: © Pan et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1049-1063
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    Published online on: July 9, 2020
       https://doi.org/10.3892/or.2020.7683
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Abstract

Increasing evidence indicates that the inflammatory tumor microenvironment can lead to cancer cell metastasis. Shikonin, which is extracted from the Chinese herb Zicao (the dried root of Lithospermum erythrorhizon), possesses various pharmacological effects, but its effect on tumor metastasis in the inflammatory microenvironment remains unknown. In the present study, we aimed to investigate the potential effect of shikonin on tumor metastasis in an inflammatory microenvironment as well as the underlying molecular mechanisms. It was found that, in the inflammatory microenvironment simulated by THP‑1 cell conditioned medium (THP‑1‑CM) in vitro, shikonin significantly inhibited the epithelial‑mesenchymal transition (EMT), migration and invasion of human lung adenocarcinoma cell lines A549 and H1299. In addition, we found that interleukin‑6 (IL‑6), which is expressed in THP‑1‑CM, promoted the EMT of lung adenocarcinoma cells, and shikonin markedly inhibited IL‑6‑induced EMT and cell motility. Moreover, shikonin inhibited IL‑6‑induced phosphorylation of signal transducer and activator of transcription 3 (STAT3), prevented phosphorylated STAT3 (p‑STAT3) translocation into the nucleus, and suppressed p‑STAT3 transactivation activity. Additionally, it was found that shikonin inhibited lung metastasis, EMT and expression of p‑STAT3 of A549 cells in vivo. Furthermore, IL‑6 levels in human lung adenocarcinoma tissues were significantly associated with tumor‑node‑metastasis stage and lymph node metastasis, and its expression was correlated with tumor‑associated macrophage (TAM) infiltration. Together, these results suggest that shikonin suppresses the migration and invasion of human lung adenocarcinoma cells in an inflammatory microenvironment involving the IL‑6/STAT3 signaling pathway.
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Copy and paste a formatted citation
Spandidos Publications style
Pan T, Zhang F, Li F, Gao X, Li Z, Li X and Ren X: Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway. Oncol Rep 44: 1049-1063, 2020.
APA
Pan, T., Zhang, F., Li, F., Gao, X., Li, Z., Li, X., & Ren, X. (2020). Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway. Oncology Reports, 44, 1049-1063. https://doi.org/10.3892/or.2020.7683
MLA
Pan, T., Zhang, F., Li, F., Gao, X., Li, Z., Li, X., Ren, X."Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway". Oncology Reports 44.3 (2020): 1049-1063.
Chicago
Pan, T., Zhang, F., Li, F., Gao, X., Li, Z., Li, X., Ren, X."Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway". Oncology Reports 44, no. 3 (2020): 1049-1063. https://doi.org/10.3892/or.2020.7683
Copy and paste a formatted citation
x
Spandidos Publications style
Pan T, Zhang F, Li F, Gao X, Li Z, Li X and Ren X: Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway. Oncol Rep 44: 1049-1063, 2020.
APA
Pan, T., Zhang, F., Li, F., Gao, X., Li, Z., Li, X., & Ren, X. (2020). Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway. Oncology Reports, 44, 1049-1063. https://doi.org/10.3892/or.2020.7683
MLA
Pan, T., Zhang, F., Li, F., Gao, X., Li, Z., Li, X., Ren, X."Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway". Oncology Reports 44.3 (2020): 1049-1063.
Chicago
Pan, T., Zhang, F., Li, F., Gao, X., Li, Z., Li, X., Ren, X."Shikonin blocks human lung adenocarcinoma cell migration and invasion in the inflammatory microenvironment via the IL‑6/STAT3 signaling pathway". Oncology Reports 44, no. 3 (2020): 1049-1063. https://doi.org/10.3892/or.2020.7683
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