Self-Iron-Enriched Bacterial Membrane Nanovesicles for Cascade and Multi-Modal Antitumor Therapy

Area of Science:

• Oncology
• Nanotechnology
• Microbiology

Background:

• Cancer treatment faces challenges in drug delivery and efficacy.
• Bacterial membranes offer potential as biocompatible nanocarriers.
• Chemodynamic therapy utilizes Fenton reactions for tumor destruction.

Purpose of the Study:

• To develop a novel multimodal cancer therapy using Pseudomonas aeruginosa bacterial membranes as nanocarriers.
• To investigate the synergistic effects of iron enrichment, immune stimulation, and drug delivery for enhanced antitumor activity.
• To evaluate the targeting and therapeutic efficacy of the bacterial membrane-based system in vitro and in vivo.

Main Methods:

• Utilizing Pseudomonas aeruginosa bacterial membranes as nanocarriers.
• Incorporating iron self-enrichment properties for Fenton reactions.
• Encapsulating the anticancer drug β-Lapachone to generate hydrogen peroxide.
• Employing the aptamer AS1411 for enhanced tumor targeting.
• Conducting in vitro and in vivo experiments to assess antitumor effects.

Main Results:

• Demonstrated a synergistic effect of three therapeutic modalities: iron-mediated Fenton reactions, inherent immune effects, and β-Lapachone drug delivery.
• Achieved enhanced hydrogen peroxide generation within tumor cells, amplifying the Fenton reaction.
• AS1411 aptamer facilitated improved tumor targeting and drug delivery.
• The multimodal strategy showed significant antitumor effects both in vitro and in vivo.

Conclusions:

• Pseudomonas aeruginosa bacterial membrane nanocarriers represent a promising platform for multimodal cancer therapy.
• The combination of iron enrichment, drug delivery, and targeting enhances therapeutic efficacy.
• This approach offers a new paradigm for bacterial membrane-based nanocarriers in cancer treatment.