A Low-Cost Photobioreactor for Scalable Gas Vesicle Production.

Area of Science:

• Biotechnology
• Biophysics
• Nanotechnology

Background:

• Gas vesicles (GVs) are protein nanostructures that scatter sound, enabling ultrasound imaging of genetically labeled cells.
• Current methods for GV production are costly and limit scalability.
• GVs offer potential as acoustic contrast agents and biosensors.

Purpose of the Study:

• To develop a cost-effective and scalable protocol for producing gas vesicles.
• To compare GVs produced using a novel photobioreactor method with those from traditional shakers.
• To assess the physicochemical properties and ultrasound imaging capabilities of photobioreactor-produced GVs.

Main Methods:

• Utilized an adapted bubble column photobioreactor design for GV production.
• Employed off-the-shelf components for accessibility and broader dissemination.
• Characterized GVs via hydrostatic collapse pressure, hydrodynamic diameter, and ultrasound imaging.

Main Results:

• The photobioreactor method produced GVs at approximately 10% of the cost of state-of-the-art methods.
• GVs produced by both methods exhibited identical physicochemical properties.
• Ultrasound imaging confirmed the functionality of GVs produced by the new protocol.

Conclusions:

• A novel, cost-effective, and scalable photobioreactor protocol for GV production was established.
• This method significantly lowers the barrier for GV accessibility in research laboratories.
• The findings pave the way for wider application of GVs in ultrasound contrast imaging and biosensing.