Nanoparticle-modified microrobots for in vivo antibiotic delivery to treat acute bacterial pneumonia.

Nanoparticle-modified microrobots for in vivo antibiotic delivery to treat acute bacterial pneumonia.
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DOI:
10.1038/s41563-022-01360-9
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发表时间:
2022-11
期刊:
影响因子:
41.2
通讯作者:
--
中科院分区:
材料科学1区
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Bioinspired microrobots capable of actively moving in biological fluids have attracted considerable attention for biomedical applications because of their unique dynamic features that are otherwise difficult to achieve by their static counterparts. Here, we use click chemistry to attach antibiotic-loaded neutrophil membrane-coated polymeric nanoparticles to natural microalgae, thus creating hybrid microrobots for the active delivery of antibiotics in the lungs in vivo. The microrobots show fast speed (> 110 μm s−1) in simulated lung fluid and uniform distribution into deep lung tissues, low clearance by alveolar macrophages, and superb tissue retention time (> 2 d) after intratracheal administration to test animals. In a mouse model of acute Pseudomonas aeruginosa pneumonia, the microrobots effectively reduce bacterial burden and substantially lessen animal mortality, with negligible toxicity. Overall, these findings highlight the attractive functions of the algae-nanoparticle hybrid microrobots for active in vivo delivery of therapeutics to the lungs in intensive care unit settings. Biohybrid microrobots consisting of nanoparticle-modified microalgae are constructedfor active drug delivery in the lungs. In an acute bacterial pneumonia model, the microrobotseffectively reduce bacterial burden and lessen animal mortality.
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