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Polyphenol‑based interventions in breast cancer: Signaling pathways, molecular mechanisms and translational
Jingjing Zeng1, Jinyan Hu2, Zhiyuan Ma2
1Department of General Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563000, P.R. China.
Abstract:
Breast cancer (BC) comprises multiple molecular subtypes with distinct epidemiological, biological and therapeutic features. Although advances in diagnosis and systemic therapy have improved patient outcomes, therapeutic resistance, treatment‑related toxicity and disease recurrence remain major clinical challenges. Growing evidence suggests that plant‑derived polyphenols may influence BC progression through multiple biological mechanisms. These compounds can inhibit tumor‑cell proliferation, migration, angiogenesis, inflammation, epithelial‑mesenchymal transition and metastasis, while promoting apoptosis, autophagy, cell‑cycle arrest and tumor‑suppressive responses. Mechanistically, polyphenols may regulate several interconnected signaling pathways involved in BC development and progression, including PI3K/AKT/mTOR, p53, NF‑κB, STAT3, Wnt/β‑catenin and MAPK signaling. In addition to their direct effects on tumor cells, polyphenols may interact with the gut microbiome, which in turn influences polyphenol metabolism, estrogen homeostasis, immune regulation, inflammation and bioavailability. Probiotics, prebiotics and microbiota‑derived metabolites may further influence this polyphenol‑gut microbiome‑BC axis. Polyphenols have also been explored as adjuvant or supportive agents in combination with chemotherapy, endocrine therapy and radiotherapy, as well as in novel delivery systems designed to improve their bioavailability and therapeutic efficacy. However, most current evidence remains preclinical. Well‑designed clinical trials are therefore needed to define the optimal formulations, doses, safety profiles, pharmacokinetics and therapeutic relevance of polyphenol‑based interventions in BC.
Insights
Plant-derived polyphenols show promise in combating breast cancer (BC) by inhibiting tumor growth and metastasis. Further clinical trials are needed to confirm their efficacy and optimal use in BC treatment.
Area of Science:
- Oncology
- Pharmacology
- Nutritional Science
Background:
- Breast cancer (BC) presents diverse molecular subtypes, posing challenges like therapeutic resistance and recurrence despite treatment advances.
- Plant-derived polyphenols are increasingly recognized for their potential anti-cancer properties.
- The interplay between polyphenols, the gut microbiome, and BC progression is a significant area of research.
Purpose of the Study:
- To review the multifaceted biological mechanisms by which plant-derived polyphenols influence breast cancer (BC) progression.
- To explore the role of the gut microbiome in mediating polyphenol effects on BC.
- To discuss the potential of polyphenols as adjuvant therapies and the need for clinical validation.
Main Methods:
- Literature review of preclinical and clinical studies on polyphenol effects in breast cancer.
- Analysis of molecular pathways targeted by polyphenols, including PI3K/AKT/mTOR, p53, NF-κB, STAT3, Wnt/β-catenin, and MAPK.
- Examination of the polyphenol-gut microbiome axis and its influence on BC.
Main Results:
- Polyphenols demonstrate inhibitory effects on tumor cell proliferation, migration, angiogenesis, inflammation, epithelial-mesenchymal transition, and metastasis.
- These compounds promote apoptosis, autophagy, cell-cycle arrest, and tumor-suppressive responses.
- Polyphenols interact with the gut microbiome, affecting metabolism, estrogen homeostasis, immune regulation, and bioavailability, influencing the polyphenol-gut microbiome-BC axis.
Conclusions:
- Plant-derived polyphenols exhibit significant potential in modulating multiple biological mechanisms relevant to breast cancer (BC) progression.
- The gut microbiome plays a crucial role in the efficacy of polyphenol-based interventions for BC.
- While promising, current evidence is largely preclinical, necessitating well-designed clinical trials to establish optimal formulations, doses, and therapeutic relevance for BC management.
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