Extremophile-based biohybrid micromotors for biomedical operations in harsh acidic environments

Summary

This experimental study uses acid-loving microalgae as living micromotors for oral delivery in the stomach, an environment that disables many robotic systems. The selected extremophile algae maintained swimming for extended periods under strongly acidic gastric conditions. Their surfaces could be fitted with cargos ranging from small molecules to nanoparticles without losing self-propulsion. After oral administration in mice, the motors successfully delivered model payloads within the gastrointestinal tract. The researchers also changed cargo surface properties and thereby altered where the payload localized along the tract, suggesting that biological motion and material chemistry can be tuned together. The principal finding is that an organism naturally adapted to acidity can supply persistent propulsion where conventional biohybrid platforms may fail, while accepting several classes of attached cargo. This establishes proof of concept for active gastrointestinal transport and spatial control rather than efficacy for a particular disease or medicine. Its significance is a general design principle: selecting a biological motor matched to the target environment can overcome harsh physiological constraints. The abstract does not quantify retention or targeting, compare therapeutic outcomes, address immune or ecological safety, describe eventual clearance, or test a disease-relevant payload.