Amplifying Engineered Bacterial Outer Membrane Vesicle Production Using Functional Peptidoglycan Inhibitors.

Area of Science:

• Biotechnology
• Chemical Biology
• Microbiology

Background:

• Outer membrane vesicles (OMVs) show promise for biomedical use but face limitations in production yield and therapeutic efficacy.
• Enhancing OMV generation is crucial for their broader application in medicine and biotechnology.

Purpose of the Study:

• To develop a chemical method for significantly boosting endogenous outer membrane vesicle (OMV) generation.
• To create customizable OMVs with enhanced therapeutic potential, particularly for photodynamic cancer therapy.

Main Methods:

• Designed chemical boosters by conjugating 4-(naphthalen-2-yl)-4-oxobutanoic acid (NA) with various compounds.
• Employed a one-step coculture process to enhance OMV production using these boosters.
• Investigated the mechanism of OMV release, focusing on peptidoglycan synthesis inhibition.

Main Results:

• Achieved up to a 65-fold increase in OMV generation through the booster-assisted coculture method.
• Demonstrated that functionalized OMVs possess significant photodynamic treatment potential in vitro and in vivo.
• Validated the booster strategy across five different bacterial strains, confirming its versatility.

Conclusions:

• The developed chemical boosters provide a simple, effective, and universal strategy to enhance OMV biomanufacturing.
• This approach offers new insights for developing improved biomanufacturing platforms for applications in cancer therapy.
• The method enables customizable production of natural or functionalized OMVs for diverse biomedical applications.