Epigallocatechin gallate promotes p53 accumulation and activity via the inhibition of MDM2-mediated p53 ubiquitination in human lung cancer cells

  • Authors:
    • Longyu Jin
    • Cui Li
    • Yan Xu
    • Li Wang
    • Jianxin Liu
    • Dianjun Wang
    • Cao  Hong
    • Zhibing Jiang
    • Yuchao Ma
    • Qian Chen
    • Fenglei Yu
  • View Affiliations

  • Published online on: March 12, 2013     https://doi.org/10.3892/or.2013.2343
  • Pages: 1983-1990
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Epigallocatechin gallate (EGCG), which is derived from green tea, is well known for its chemopreventive activity. Several studies have shown that p53 plays an important role in the activity of EGCG; however, the mechanism by which EGCG regulates p53 requires further investigation. In the present study, we showed that EGCG inhibits anchorage-independent growth of human lung cancer cells by upregulating p53 expression. EGCG treatment can substantially increase p53 stability, promote nuclear localization of p53 and decrease nuclear accumulation of MDM2. We also found that EGCG increases the phosphorylation of p53 at Ser15 and Ser20 and enhances its transcriptional activity. Although EGCG promotes MDM2 expression in a p53-dependent manner, the interaction between MDM2 and p53 was significantly inhibited following EGCG treatment, which resulted in the inhibition of MDM2-mediated p53 ubiquitination. Thus, our results suggest that the stabilization and activation of p53 may partly contribute to the anticancer activity of EGCG.
View Figures
View References

Related Articles

Journal Cover

May 2013
Volume 29 Issue 5

Print ISSN: 1021-335X
Online ISSN:1791-2431

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Jin L, Li C, Xu Y, Wang L, Liu J, Wang D, Hong C, Jiang Z, Ma Y, Chen Q, Chen Q, et al: Epigallocatechin gallate promotes p53 accumulation and activity via the inhibition of MDM2-mediated p53 ubiquitination in human lung cancer cells. Oncol Rep 29: 1983-1990, 2013.
APA
Jin, L., Li, C., Xu, Y., Wang, L., Liu, J., Wang, D. ... Yu, F. (2013). Epigallocatechin gallate promotes p53 accumulation and activity via the inhibition of MDM2-mediated p53 ubiquitination in human lung cancer cells. Oncology Reports, 29, 1983-1990. https://doi.org/10.3892/or.2013.2343
MLA
Jin, L., Li, C., Xu, Y., Wang, L., Liu, J., Wang, D., Hong, C., Jiang, Z., Ma, Y., Chen, Q., Yu, F."Epigallocatechin gallate promotes p53 accumulation and activity via the inhibition of MDM2-mediated p53 ubiquitination in human lung cancer cells". Oncology Reports 29.5 (2013): 1983-1990.
Chicago
Jin, L., Li, C., Xu, Y., Wang, L., Liu, J., Wang, D., Hong, C., Jiang, Z., Ma, Y., Chen, Q., Yu, F."Epigallocatechin gallate promotes p53 accumulation and activity via the inhibition of MDM2-mediated p53 ubiquitination in human lung cancer cells". Oncology Reports 29, no. 5 (2013): 1983-1990. https://doi.org/10.3892/or.2013.2343