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Current Molecular Medicine


ISSN (Print): 1566-5240
ISSN (Online): 1875-5666

Research Article

Caffeic Acid Phenethyl Ester Inhibits Ubiquitination and Degradation of p53 and Blocks Cervical Cancer Cell Growth

Author(s): Wei Li, Cong Yang, Zhongxiu Shi, Qingqing Long, Zhiying Cheng, Shan He, Jiahui Dong, Tao Liu and Chengcheng Wang*

Volume 23, Issue 9, 2023

Published on: 11 October, 2022

Page: [960 - 970] Pages: 11

DOI: 10.2174/1566524023666220829154716

Price: $65


Background: In high-risk human papillomavirus (HR-HPV)-positive cervical cancer, E6-associated protein (E6AP), an E3 ubiquitin ligase, mediates the ubiquitination and proteasomal degradation of the tumor suppressor p53. Here, we addressed the question of whether caffeic acid phenethyl ester (CAPE), a natural product mainly derived from propolis, can disrupt the interaction between E6AP and p53, inhibit ubiquitination degradation of p53 and exhibit anti-cervical cancer activity.

Methods: The ability of CAPE to inhibit growth and to induce apoptosis was shown in HR-HPV-positive cervical cancer cell lines by performing CCK-8, colony formation and TUNEL assays. Apoptosis-related proteins were tested by western blotting. Coimmunoprecipitation, ubiquitination assay and protein stability assay were carried out to determine whether CAPE can disrupt the E6AP-p53 interaction and inhibit ubiquitination degradation of p53.

Results: Our results showed that CAPE inhibits the growth of HR-HPV-positive cervical cancer cells and induces the activation of apoptosis-related pathways. Importantly, CAPE inhibits E6AP expression and disrupts the interaction between E6AP and p53. It inhibits the ubiquitination of p53 and promotes its stabilization.

Conclusion: In summary, CAPE has a therapeutic effect on HPV-positive malignant cells, so further studies are needed to assess its clinical application.

Keywords: CAPE, cervical, cancer, HPV, E6AP, p53.

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