Dissecting the Roles of PDCD4 in Breast Cancer

Qian Cai, Hsin Sheng Yang, Yi Chen Li, Jiang Zhu

Research output: Contribution to journalReview articlepeer-review

13 Scopus citations


The human programmed cell death 4 (PDCD4) gene was mapped at chromosome 10q24 and encodes the PDCD4 protein comprised of 469 amino acids. PDCD4 inhibits protein translation PDCD4 inhibits protein translation to suppress tumor progression, and its expression is frequently decreased in breast cancer. PDCD4 blocks translation initiation complex by binding eIF4A via MA-3 domains or by directly binding 5’ mRNA internal ribosome entry sites with an RNA binding domain to suppress breast cancer progression and proliferation. Numerous regulators and biological processes including non-coding RNAs, proteasomes, estrogen, natural compounds and inflammation control PDCD4 expression in breast cancer. Loss of PDCD4 expression is also responsible for drug resistance in breast cancer. HER2 activation downregulates PDCD4 expression by activating MAPK, AKT, and miR-21 in aromatase inhibitor-resistant breast cancer cells. Moreover, modulating the microRNA/PDCD4 axis maybe an effective strategy for overcoming chemoresistance in breast cancer. Down-regulation of PDCD4 is significantly associated with short overall survival of patients, which suggests that PDCD4 may be an independent prognostic marker for breast cancer.

Original languageEnglish
Article number855807
JournalFrontiers in Oncology
StatePublished - Jun 20 2022

Bibliographical note

Publisher Copyright:
Copyright © 2022 Cai, Yang, Li and Zhu.


  • PDCD4
  • breast cancer
  • drug resistance
  • translational control
  • tumor suppressor

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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