Electrolytic ablation enables cancer cell targeting through pH modulation

Area of Science:

• Oncology
• Biomedical Engineering
• Tumor Microenvironment

Background:

• Minimally invasive ablation strategies are crucial for locoregional tumor treatment.
• Electrolytic ablation offers precise, non-thermal tumor destruction via direct current delivery.
• The precise mechanism of electrolytic ablation remains incompletely understood, limiting clinical application.

Purpose of the Study:

• To elucidate the mechanism of action for electrolytic ablation.
• To demonstrate how electrolytic ablation induces tumor cell death and necrosis.
• To explore the potential of electrolytic ablation as a curative cancer therapy.

Main Methods:

• Investigated the effects of direct current delivery on tumor microenvironment.
• Analyzed localized pH changes at electrodes during electrolytic ablation.
• Assessed cell death and tumor necrosis in response to modulated pH levels.

Main Results:

• Electrolytic ablation induces rapid cell death by generating acid and base, drastically altering local pH (>10.6 or <4.8).
• Tumor necrosis is directly correlated with extreme pH changes.
• Cell death extent is influenced by local buffering capacity and antioxidant availability.

Conclusions:

• Electrolytic ablation functions by directly altering the tumor microenvironment's pH, distinguishing it from thermal ablation methods.
• This mechanism leads to cellular necrosis and macroscopic tumor death.
• Findings support the further development of electrolytic ablation for treating primary, early-stage tumors.