Piezo1 Channel Mediates Mechanically Programmable Drug Delivery to Potentiate Intravesical Chemotherapy

Area of Science:

• Oncology
• Biophysics
• Biomedical Engineering

Background:

• Intravesical chemotherapy for bladder cancer has limited efficacy and significant toxicity.
• Existing physical-assisted methods (e.g., hyperthermia, electromotive drug administration) are complex and costly.
• There is a need for simpler, more effective bladder cancer treatment strategies.

Purpose of the Study:

• To develop and evaluate a novel mechano-chemotherapy strategy using programmable mechanical pressure.
• To investigate the role of the Piezo1 ion channel in enhancing chemotherapy delivery and efficacy.
• To assess the antitumor efficacy and toxicity profile of mechano-chemotherapy in preclinical models.

Main Methods:

• Controlled mechanical pressure was applied to bladder cancer cells and orthotopic models.
• Activation of the Piezo1 ion channel and subsequent calcium signaling were analyzed.
• Intracellular accumulation of chemotherapeutics (Doxorubicin, Mitomycin-C) was measured.
• Antitumor efficacy and mucosal toxicity were evaluated in vivo.

Main Results:

• Mechanical pressure activated Piezo1 channels, increasing mechanosensitivity and membrane permeability.
• This enhanced intracellular accumulation of Doxorubicin and Mitomycin-C, leading to increased tumor cell apoptosis.
• Mechano-chemotherapy significantly improved antitumor efficacy in orthotopic models.
• The strategy mitigated dose-limiting mucosal toxicity compared to conventional chemotherapy.

Conclusions:

• Piezo1-mediated mechano-chemotherapy is a simple and effective strategy for bladder cancer treatment.
• Programmable mechanical pressure can be translated into a safe and potent tool for optimizing chemotherapy.
• This approach offers a promising new avenue for improving bladder cancer therapy outcomes.