ArticleCells2022
eIF4A/PDCD4 Pathway, a Factor for Doxorubicin Chemoresistance in a Triple-Negative Breast Cancer Cell Model.
Article in Cells, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 18 citations in OpenAlex.
- Nrf2 Is Associated with Metastasis-Related Processes in a Chemoresistant Breast Cancer Model: Insights from siRNA Modulation.International journal of molecular sciences · 2026Article
- The translation factor eIF4E is a key mediator of doxorubicin resistance: insights from a triple-negative breast cancer model.Scientific reports · 2026Article
- Role of microRNA-761 in modulating laryngeal cancer cell proliferation, metastasis, and apoptosis: regulation of PDCD4 as a key mechanism.Molecular biology reports · 2025Article
- Lapatinib-Resistant HER2+ Breast Cancer Cells Are Associated with Dysregulation of MAPK and p70S6K/PDCD4 Pathways and Calcium Management, Influence of Cryptotanshinone.International journal of molecular sciences · 2025Article
- Genistein as a Chemo-modulatory Agent: Exploring its Potential in Chemosensitization and Combinatorial Therapeutic Strategies for Cancer Treatment.Current topics in medicinal chemistry · 2025Review
- The Impact of Pdcd4, a Translation Inhibitor, on Drug Resistance.Pharmaceuticals (Basel, Switzerland) · 2024Review
- Auraptene Boosts the Efficacy of the Tamoxifen Metabolites Endoxifen and 4-OH-Tamoxifen in a Chemoresistant ER+ Breast Cancer Model.Pharmaceutics · 2024Article
- Tamoxifen metabolites treatment promotes ERα+ transition to triple negative phenotype in vitro, effects of LDL in chemoresistance.Bioscience reports · 2024Article
- Endoplasmic reticulum stress-a key guardian in cancer.Cell death discovery · 2024Review
- Low-Density Lipoproteins Increase Proliferation, Invasion, and Chemoresistance via an Exosome Autocrine Mechanism in MDA-MB-231 Chemoresistant Cells.Biomedicines · 2024Article
- Protein translation: biological processes and therapeutic strategies for human diseases.Signal transduction and targeted therapy · 2024Review
- A human pan-cancer system analysis of heat shock protein family A member 5.American journal of cancer research · 2023Article
Corrections and comments
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Authors and funding
12 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Cells employ several adaptive mechanisms under conditions of accelerated cell division, such as the unfolded protein response (UPR). The UPR is composed of a tripartite signaling system that involves ATF6, PERK, and IRE1, which maintain protein homeostasis (proteostasis). However, deregulation of protein translation initiation could be associated with breast cancer (BC) chemoresistance. Specifically, eukaryotic initiation factor-4A (eIF4A) is involved in the unfolding of the secondary structures of several mRNAs at the 5' untranslated region (5'-UTR), as well as in the regulation of targets involved in chemoresistance. Importantly, the tumor suppressor gene PDCD4 could modulate this process. This regulation might be disrupted in chemoresistant triple negative-BC (TNBC) cells. Therefore, we characterized the effect of doxorubicin (Dox), a commonly used anthracycline medication, on human breast carcinoma MDA-MB-231 cells. Here, we generated and characterized models of Dox chemoresistance, and chemoresistant cells exhibited lower Dox internalization levels followed by alteration of the IRE1 and PERK arms of the UPR and triggering of the antioxidant Nrf2 axis. Critically, chemoresistant cells exhibited PDCD4 downregulation, which coincided with a reduction in eIF4A interaction, suggesting a sophisticated regulation of protein translation. Likewise, Dox-induced chemoresistance was associated with alterations in cellular migration and invasion, which are key cancer hallmarks, coupled with changes in focal adhesion kinase (FAK) activation and secretion of matrix metalloproteinase-9 (MMP-9). Moreover, eIF4A knockdown via siRNA and its overexpression in chemoresistant cells suggested that eIF4A regulates FAK. Pro-atherogenic low-density lipoproteins (LDL) promoted cellular invasion in parental and chemoresistant cells in an MMP-9-dependent manner. Moreover, Dox only inhibited parental cell invasion. Significantly, chemoresistance was modulated by cryptotanshinone (Cry), a natural terpene purified from the roots of
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