Flow electroporation with pulsed electric fields for purging tumor cells

Area of Science:

• Biotechnology
• Cell Biology
• Cancer Research

Background:

• Electroporation uses pulsed electric fields (PEFs) for transient cell membrane poration and transfection.
• PEFs can selectively eliminate larger cells, including tumor cells, while preserving smaller viable cells.
• This technology is crucial for tumor purging in progenitor-cell transfusions for cancer treatment.

Purpose of the Study:

• To describe a novel flowing chamber apparatus for large-scale tumor purging of clinical progenitor-cell transfusions.
• To overcome challenges in electrical resistance, purging fidelity, and sample volume for effective cell purging.
• To optimize PEF application for efficient and selective cancer cell removal.

Main Methods:

• Design and construction of a flowing chamber pulsed electric field apparatus.
• Optimization of flow conditions for treating large cell volumes (greater than 10^9 cells).
• Application of defined PEF strength to heterogeneous cell mixtures.

Main Results:

• Treatment of over 10^9 cells in 30 minutes under optimized flow conditions.
• Efficient tumor purging of greater than 3 logs achieved for mixtures of tumor and mononuclear cells.
• Preservation and enrichment of viable progenitor cells during the purging process.

Conclusions:

• The flowing chamber PEF apparatus enables efficient, large-scale tumor purging of clinical progenitor-cell transfusions.
• This technique supports high-dose chemotherapy by ensuring purged grafts for autologous stem-cell transplantation.
• PEF technology offers a promising method for improving disease-free survival in hematologic malignancies.