Open Access

Quercetin reduces cyclin D1 activity and induces G1 phase arrest in HepG2 cells

  • Authors:
    • Jin Zhou
    • Lu Li
    • Li Fang
    • Hua Xie
    • Wenxiu Yao
    • Xiang Zhou
    • Zhujuan Xiong
    • Li Wang
    • Zhixi Li
    • Feng Luo
  • View Affiliations

  • Published online on: May 27, 2016     https://doi.org/10.3892/ol.2016.4639
  • Pages: 516-522
  • Copyright: © Zhou et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Quercetin is able to inhibit proliferation of malignant tumor cells; however, the exact mechanism involved in this biological process remains unclear. The current study utilized a quantitative proteomic analysis to explore the antitumor mechanisms of quercetin. The leucine of HepG2 cells treated with quercetin was labeled as d3 by stable isotope labeling by amino acids in cell culture (SILAC). The isotope peaks of control HepG2 cells were compared with the d3‑labeled HepG2 cells by mass spectrometry (MS) to identify significantly altered proteins. Reverse transcription‑polymerase chain reaction (RT‑PCR) and western blot analyses were subsequently employed to verify the results of the MS analysis. A flow cytometry assay was designed to observe the influence of various quercetin treatment concentrations on the cell cycle distribution of HepG2 cells. The results indicated that quercetin is able to substantially inhibit proliferation of HepG2 cells and induce an obvious morphological alteration of cells. According to the MS results, the 70 credibly‑changed proteins that were identified may play important roles in multiple cellular processes, including protein synthesis, signaling, cytoskeletal processes and metabolism. Among these functional proteins, the expression of cyclin D1 (CCND1) was found to be significantly decreased. RT‑PCR and western blot analyses verified the SILAC‑MS results of decreased CCND1 expression. In summary, flow cytometry revealed that quercetin is able to induce G1 phase arrest in HepG2 cells. Based on the aforementioned observations, it is suggested that quercetin exerts antitumor activity in HepG2 cells through multiple pathways, including interfering with CCND1 gene expression to disrupt the cell cycle and proliferation of HepG2 cells. In the future, we aim to explore this effect in vivo.
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July-2016
Volume 12 Issue 1

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Zhou J, Li L, Fang L, Xie H, Yao W, Zhou X, Xiong Z, Wang L, Li Z, Luo F, Luo F, et al: Quercetin reduces cyclin D1 activity and induces G1 phase arrest in HepG2 cells. Oncol Lett 12: 516-522, 2016.
APA
Zhou, J., Li, L., Fang, L., Xie, H., Yao, W., Zhou, X. ... Luo, F. (2016). Quercetin reduces cyclin D1 activity and induces G1 phase arrest in HepG2 cells. Oncology Letters, 12, 516-522. https://doi.org/10.3892/ol.2016.4639
MLA
Zhou, J., Li, L., Fang, L., Xie, H., Yao, W., Zhou, X., Xiong, Z., Wang, L., Li, Z., Luo, F."Quercetin reduces cyclin D1 activity and induces G1 phase arrest in HepG2 cells". Oncology Letters 12.1 (2016): 516-522.
Chicago
Zhou, J., Li, L., Fang, L., Xie, H., Yao, W., Zhou, X., Xiong, Z., Wang, L., Li, Z., Luo, F."Quercetin reduces cyclin D1 activity and induces G1 phase arrest in HepG2 cells". Oncology Letters 12, no. 1 (2016): 516-522. https://doi.org/10.3892/ol.2016.4639