生物膜
纳米机器人学
磁性纳米粒子
材料科学
纳米技术
机械敏感通道
趋磁细菌
磁场
细菌
微生物学
生物物理学
化学
纳米颗粒
生物
物理
离子通道
遗传学
生物化学
受体
量子力学
作者
Slavko Kralj,Charlotte Da Silva,Sebastjan Nemec,Maja Caf,Isabelle Fourquaux,Marie‐Pierre Rols,Muriel Golzio,Alenka Mertelj,Jelena Kolosnjaj‐Tabi
标识
DOI:10.1002/adhm.202403736
摘要
Abstract Bacterial resistance is gaining ground and novel, unconventional strategies are required to improve antibiotic treatments. As a synthetic analog of planktonic bacilli, the natural bacterial swimmers that can penetrate bacterial biofilms, ultra‐short propelling magnetic nanochains are presented as bioinspired magnetic nanorobots, enhancing the antibiotic treatment in biofilm‐forming Staphylococcus epidermidis . Propelling nanochains, activated by a low intensity (<20 mT) and low frequency (<10 Hz) rotating magnetic field (RMF), prompt the otherwise resistant biofilm‐forming bacteria to become sensitive to methicillin, resulting in the killing of 99.99% of bacteria. While magnetic force‐driven spherical magnetic nanoparticles were previously reported as unidirectional biofilm channel diggers, propelling nanochains emerge as second‐generation magnetic nanorobots, which, due to their magnetic core, shape anisotropy, and negative zeta potential, combine magnetic responsiveness, torque‐driven movement, and attractive electrostatic interactions to attach to bacterial aggregates and multi‐directionally protrude throughout the biofilm, indulging mechanical forces. These synergistic effects, in combination with an antibiotic drug, destroy the bacterial extracellular matrix and eradicate the formed biofilm, as confirmed with several complementary techniques.
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