Novel Multifunctional Silver Nanocomposite Serves as a Resistance-Reversal Agent to Synergistically Combat Carbapenem-Resistant Acinetobacter baumannii
- Xisheng Li
Xisheng LiDepartment of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Xisheng Li
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- Rong Gui
Rong GuiDepartment of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Rong Gui
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- Jian Li
Jian LiDepartment of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Jian Li
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- Rong Huang
Rong HuangDepartment of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Rong Huang
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- Yinghui Shang
Yinghui ShangDepartment of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Yinghui Shang
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- Qiangqiang Zhao
Qiangqiang ZhaoDepartment of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Qiangqiang Zhao
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- Haiting Liu
Haiting LiuDepartment of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Haiting Liu
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- Haiye Jiang
Haiye JiangDepartment of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Haiye Jiang
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- Xueling Shang
Xueling ShangDepartment of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Xueling Shang
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- Xin Wu
Xin WuDepartment of Orthopedics, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaMore by Xin Wu
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- Xinmin Nie*
Xinmin NieDepartment of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha 410013, P. R. ChinaHunan Engineering Technology Research Center of Optoelectronic Health Detection, Changsha 410000, Hunan, ChinaMore by Xinmin Nie
Abstract
In the face of the abundant production of various types of carbapenemases, the antibacterial efficiency of imipenem, seen as “the last line of defense”, is weakening. Following, the incidence of carbapenem-resistant Acinetobacter baumannii (CRAB), which can generate antibiotic-resistant biofilms, is increasing. Based on the superior antimicrobial activity of silver nanoparticles against multifarious bacterial strains compared with common antibiotics, we constructed the IPM@AgNPs-PEG-NOTA nanocomposite (silver nanoparticles were coated with SH-PEG-NOTA as well as loaded by imipenem) whose core was a silver nanoparticle to address the current challenge, and IPM@AgNPs-PEG-NOTA was able to function as a novel smart pH-sensitive nanodrug system. Synergistic bactericidal effects of silver nanoparticles and imipenem as well as drug-resistance reversal via protection of the β-ring of carbapenem due to AgNPs-PEG-NOTA were observed; thus, this nanocomposite confers multiple advantages for efficient antibacterial activity. Additionally, IPM@AgNPs-PEG-NOTA not only offers immune regulation and accelerates tissue repair to improve therapeutic efficacy in vivo but also can prevent the interaction of pathogens and hosts. Compared with free imipenem or silver nanoparticles, this platform significantly enhanced antibacterial efficiency while increasing reactive oxygen species (ROS) production and membrane damage, as well as affecting cell wall formation and metabolic pathways. According to the results of crystal violet staining, LIVE/DEAD backlight bacterial viability staining, and real-time quantitative polymerase chain reaction (RT-qPCR), this silver nanocomposite downregulated the levels of ompA expression to prevent formation of biofilms. In summary, this research demonstrated that the IPM@AgNPs-PEG-NOTA nanocomposite is a promising antibacterial agent of security, pH sensitivity, and high efficiency in reversing resistance and synergistically combatting carbapenem-resistant A. baumannii. In the future, various embellishments and selected loads for silver nanoparticles will be the focus of research in the domains of medicine and nanotechnology.
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