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Updated: Dec 19, 2025
Author Spotlight: Exploring the Role of Ion Channels in Cancer: Characterization and Potential Treatment Approaches
Published on: June 16, 2023
Focus on Triple-Negative Breast Cancer: Potassium Channel Expression and Clinical Correlates
1Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy.
Abstract:
Despite improvements in early diagnosis and treatment, breast cancer is still a major health problem worldwide. Among breast cancer subtypes, the most challenging and harder to treat is represented by triple-negative molecular subtype. Due to its intrinsic features this subtype cannot be treated neither with hormonal therapy (since it does not express estrogen or progesterone receptors) nor with epidermal growth factor receptor 2 (HER2) inhibitors (as it does not express high levels of this protein). For these reasons, the standard of care for these patients is represented by a combination of surgery, radiation therapy and chemotherapy. In this scenario, searching for novel biomarkers that might help both in diagnosis and therapy is mandatory. In the last years, it was shown that different families of potassium channels are overexpressed in primary breast cancers. The altered ion channel expression may be useful for diagnostic and therapeutic purposes due to some peculiar characteristics of this class of molecules. Ion channels are defined as pore-forming transmembrane proteins regulating passive ion fluxes in the cells. Ion channels represent good potential markers since, being localized at the plasma membrane level, their detection and block with specific drugs and antibodies might be fast and tunable. This review focuses on triple-negative breast cancers and recapitulates the current knowledge about potassium channels' clinical relevance and their potential use in the clinical setting, for triple-negative breast cancer diagnosis and therapy.
Insights
Triple-negative breast cancer (TNBC) lacks targeted therapies. This review explores potassium channels as potential biomarkers for TNBC diagnosis and treatment, offering new therapeutic avenues.
Area of Science:
- Oncology
- Molecular Biology
- Biophysics
Background:
- Triple-negative breast cancer (TNBC) is a challenging subtype lacking targeted therapies, relying on surgery, radiation, and chemotherapy.
- Current treatment limitations for TNBC necessitate the search for novel diagnostic and therapeutic biomarkers.
- Potassium channels, transmembrane proteins regulating ion flux, are increasingly recognized for their altered expression in primary breast cancers.
Purpose of the Study:
- To review the clinical relevance of potassium channels in triple-negative breast cancers.
- To explore the potential of potassium channels as diagnostic and therapeutic targets for TNBC.
- To highlight the unique characteristics of ion channels as potential biomarkers.
Main Methods:
- Literature review focusing on studies investigating potassium channels in breast cancer.
- Analysis of current knowledge on the role of potassium channels in TNBC.
- Discussion of the diagnostic and therapeutic potential of targeting ion channels.
Main Results:
- Potassium channels are overexpressed in primary breast cancers, including TNBC.
- Ion channels' plasma membrane localization facilitates detection and targeted drug/antibody intervention.
- Altered ion channel expression presents unique characteristics valuable for clinical applications.
Conclusions:
- Potassium channels show significant potential as biomarkers for triple-negative breast cancer diagnosis.
- Targeting potassium channels could offer novel therapeutic strategies for TNBC.
- Further research into ion channel function and expression is crucial for clinical translation.
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