Autonomous bacterial nanoswimmers target cancer

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Microbiology

Background:

• Targeted drug delivery systems are crucial for effective cancer treatment.
• Current methods face challenges in reaching tumor sites and minimizing side effects.
• Autonomous, self-propelled systems offer a promising advancement in precision medicine.

Purpose of the Study:

• To develop an injectable, autonomous drug delivery system for targeted cancer therapy.
• To utilize viable bacteria as carriers for chemotherapeutic agents.
• To engineer a system that releases its payload upon reaching and invading cancer cells.

Main Methods:

• Development of a bacterial drug delivery platform loaded with doxorubicin-containing nanoparticles.
• Investigation of bacterial motility and cancer cell invasion.
• Assessment of drug release mechanisms and therapeutic efficacy within cancer cells.
• Evaluation of the dual therapeutic and self-destructive action of the system.

Main Results:

• The developed bacterial nanoswimmers autonomously navigated towards cancer cells.
• Bacteria demonstrated increased velocity in nutrient-rich tumor microenvironments.
• Doxorubicin was successfully released inside cancer cells, leading to bacterial destruction and cancer cell death.
• The system showed dual action, treating cancer while eliminating the bacterial carrier.

Conclusions:

• Viable bacteria loaded with nanoparticles represent a viable platform for autonomous targeted drug delivery.
• This approach enables precise delivery of chemotherapeutics directly to cancer cells.
• The self-destructive nature of the carrier enhances safety and supports the feasibility of nanoswimmers in drug delivery.