Cbl participates in shikonin-induced apoptosis by negatively regulating phosphoinositide 3-kinase/protein kinase B signaling

  • Authors:
    • Dan Qu
    • Xiao‑Man Xu
    • Meng Zhang
    • Ting‑Shu Jiang
    • Yi Zhang
    • Sheng‑Qi Li
  • View Affiliations

  • Published online on: March 18, 2015     https://doi.org/10.3892/mmr.2015.3510
  • Pages: 1305-1313
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Abstract

Shikonin, a naturally occurring naphthoquinone, exhibits anti-tumorigenic activity. However, its precise mechanisms of action have remained elusive. In the present study, the involvement in the action of shikonin of the ubiquitin ligases Cbl‑b and c‑Cbl, which are negative regulators of phosphoinositide 3‑kinase (PI3K) activation, was investigated. Shikonin was observed to reduce cell viability and induce apoptosis and G2/M phase arrest in lung cancer cells. In addition, shikonin increased the protein levels of B‑cell lymphoma 2 (Bcl‑2)‑associated X and p53 and reduced those of Bcl‑2. Additionally, shikonin inhibited PI3k/Akt activity and upregulated Cbl protein expression. In addition, a specific inhibitor of PI3K, LY294002, was observed to have a synergistic effect on the proliferation inhibition and apoptotic induction of A549 cells with shikonin. In conclusion, the results of the present study suggested that Cbl proteins promote shikonin‑induced apoptosis by negatively regulating PI3K/Akt signaling in lung cancer cells.
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July-2015
Volume 12 Issue 1

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Qu D, Xu XM, Zhang M, Jiang TS, Zhang Y and Li SQ: Cbl participates in shikonin-induced apoptosis by negatively regulating phosphoinositide 3-kinase/protein kinase B signaling. Mol Med Rep 12: 1305-1313, 2015
APA
Qu, D., Xu, X., Zhang, M., Jiang, T., Zhang, Y., & Li, S. (2015). Cbl participates in shikonin-induced apoptosis by negatively regulating phosphoinositide 3-kinase/protein kinase B signaling. Molecular Medicine Reports, 12, 1305-1313. https://doi.org/10.3892/mmr.2015.3510
MLA
Qu, D., Xu, X., Zhang, M., Jiang, T., Zhang, Y., Li, S."Cbl participates in shikonin-induced apoptosis by negatively regulating phosphoinositide 3-kinase/protein kinase B signaling". Molecular Medicine Reports 12.1 (2015): 1305-1313.
Chicago
Qu, D., Xu, X., Zhang, M., Jiang, T., Zhang, Y., Li, S."Cbl participates in shikonin-induced apoptosis by negatively regulating phosphoinositide 3-kinase/protein kinase B signaling". Molecular Medicine Reports 12, no. 1 (2015): 1305-1313. https://doi.org/10.3892/mmr.2015.3510