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Xu G, Ren Z, Xu J, Lu H, Liu X, Qu Y, Li W, Zhao M, Huang W, Li YQ. Organic-Inorganic Heterointerface-Expediting Electron Transfer Realizes Efficient Plasmonic Catalytic Sterilization via a Carbon-Dot Nanozyme. ACS APPLIED MATERIALS & INTERFACES 2024; 16:21689-21698. [PMID: 38629436 DOI: 10.1021/acsami.4c03105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Plasmonic nanozymes bring enticing prospects for catalytic sterilization by leveraging plasmon-engendered hot electrons. However, the interface between plasmons and nanozymes as the mandatory path of hot electrons receives little attention, and the mechanisms of plasmonic nanozymes still remain to be elucidated. Herein, a plasmonic carbon-dot nanozyme (FeCG) is developed by electrostatically assembling catalytic iron-doped carbon dots (Fe-CDs) with plasmonic gold nanorods. The energy harvesting and hot-electron migration are remarkably expedited by a spontaneous organic-inorganic heterointerface holding a Fermi level-induced interfacial electric field. The accumulated hot electrons are then fully utilized by conductive Fe-CDs to boost enzymatic catalysis toward overproduced reactive oxygen species. By synergizing with localized heating from hot-electron decay, FeCG achieves rapid and potent disinfection with an antibacterial efficiency of 99.6% on Escherichia coli within 5 min and is also effective (94.2%) against Staphylococcus aureus. Our work presents crucial insights into the organic-inorganic heterointerface in advanced plasmonic biocidal nanozymes.
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Affiliation(s)
- Guopeng Xu
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Zhiyuan Ren
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Jiachen Xu
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Hongwang Lu
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Xiangdong Liu
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Yuanyuan Qu
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Weifeng Li
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Mingwen Zhao
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Weimin Huang
- Orthopedic Department, 960 Hospital of People's Liberation Army, Jinan 250031, China
| | - Yong-Qiang Li
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
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Sha XL, Lv GT, Chen QH, Cui X, Wang L, Cui X. A peptide selectively recognizes Gram-negative bacteria and forms a bacterial extracellular trap (BET) through interfacial self-assembly. J Mater Chem B 2024; 12:3676-3685. [PMID: 38530749 DOI: 10.1039/d3tb02559d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
An innate immune system intricately leverages unique mechanisms to inhibit colonization of external invasive Bacteria, for example human defensin-6, through responsive encapsulation of bacteria. Infection and accompanying antibiotic resistance stemming from Gram-negative bacteria aggregation represent an emerging public health crisis, which calls for research into novel anti-bacterial therapeutics. Herein, inspired by naturally found host-defense peptides, we design a defensin-like peptide ligand, bacteria extracellular trap (BET) peptide, with modular design composed of targeting, assembly, and hydrophobic motifs with an aggregation-induced emission feature. The ligand specifically recognizes Gram-negative bacteria via targeting cell wall conserved lipopolysaccharides (LPS) and transforms from nanoparticles to nanofibrous networks in situ to trap bacteria and induce aggregation. Importantly, treatment of the BET peptide was found to have an antibacterial effect on the Pseudomonas aeruginosa strain, which is comparable to neomycin. Animal studies further demonstrate its ability to trigger aggregation of bacteria in vivo. This biomimetic self-assembling BET peptide provides a novel approach to fight against pathogenic Gram-negative bacteria.
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Affiliation(s)
- Xiao-Ling Sha
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P.R. China.
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, P.R. China
| | - Gan-Tian Lv
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P.R. China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Qing-Hua Chen
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P.R. China.
- Sino-Danish College, Sino-Danish Center for Education and Research, University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Xin Cui
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P.R. China.
- Department of Orthopedics, The 4th Medical Center of Chinese PLA General Hospital, Beijing, 100091, P.R. China.
- Department of Graduate, Hebei North University, No. 11 Diamond South Road, High-tech Zone, Zhangjiakou, Hebei Province, 075000, P.R. China
| | - Lei Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P.R. China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Xu Cui
- Department of Orthopedics, The 4th Medical Center of Chinese PLA General Hospital, Beijing, 100091, P.R. China.
- Department of Graduate, Hebei North University, No. 11 Diamond South Road, High-tech Zone, Zhangjiakou, Hebei Province, 075000, P.R. China
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Wu M, Kong X, Li H, Ji Y, He S, Shi Y, Hu H. Cyclic peptide conjugated photosensitizer for targeted phototheranostics of gram-negative bacterial infection. Bioorg Chem 2024; 145:107203. [PMID: 38377817 DOI: 10.1016/j.bioorg.2024.107203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 01/04/2024] [Accepted: 02/06/2024] [Indexed: 02/22/2024]
Abstract
Antimicrobial photodynamic therapy (PDT) is a promising alternative to antibiotics for eradicating pathogenic bacterial infections. It holds advantage of not inducing antimicrobial resistance but is limited for the treatment of gram-negative bacterial infection due to the lack of photosensitizer (PS) capable of targeted permeating the outer membrane (OM) of gram-negative bacteria. To facilitate the targeted permeability of PS, cyclic polymyxin b nonapeptide that can specifically bind to the lipopolysaccharide on OM, is conjugated to an FDA approved PS chlorin e6 via variable linkers. Based on structure to activity study, C6pCe6 with aminohexanoic linker and P2pCe6 with amino-3, 6-dioxaoctanoic linker are identified to preferentially image gram-negative bacteria. These two conjugates also exhibit improved aqueous dispersity and enhanced ROS generation, consequently enabled their selective bactericidal activities against gram-negative bacteria upon 660 nm light irradiation. The effective photobactericidal ability of P2pCe6 is further validated on P. aeruginosa infected G. mellonella. Moreover, it is demonstrated to effectively treat the P. aeruginosa infection and accelerate the healing process at the wound site of mouse. Owing to the light irradiation triggered targeted imaging and enhanced bactericidal capacities, P2pCe6 hold great potential to serve as a potent PS for mediating the phototheranostics of gram-negative bacterial infection.
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Affiliation(s)
- Minghao Wu
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China; School of Medicine, Shanghai University, Shanghai 200444, China
| | - Xiangxiang Kong
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China; School of Medicine, Shanghai University, Shanghai 200444, China
| | - Huang Li
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China; School of Medicine, Shanghai University, Shanghai 200444, China
| | - Yajing Ji
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China; School of Medicine, Shanghai University, Shanghai 200444, China
| | - Shipeng He
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China
| | - Yejiao Shi
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China.
| | - Honggang Hu
- School of Medicine, Shanghai University, Shanghai 200444, China.
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Zhu J, Li X, Zhou Y, Ge C, Li X, Hou M, Wei Y, Chen Y, Leong KW, Yin L. Inhaled immunoantimicrobials for the treatment of chronic obstructive pulmonary disease. SCIENCE ADVANCES 2024; 10:eabd7904. [PMID: 38324682 PMCID: PMC10849584 DOI: 10.1126/sciadv.abd7904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 01/05/2024] [Indexed: 02/09/2024]
Abstract
Effective therapeutic modalities and drug administration strategies for the treatment of chronic obstructive pulmonary disease (COPD) exacerbations are lacking. Here, mucus and biofilm dual-penetrating immunoantimicrobials (IMAMs) are developed for bridging antibacterial therapy and pro-resolving immunotherapy of COPD. IMAMs are constructed from ceftazidime (CAZ)-encapsulated hollow mesoporous silica nanoparticles (HMSNs) gated with a charge/conformation-transformable polypeptide. The polypeptide adopts a negatively charged, random-coiled conformation, masking the pores of HMSNs to prevent antibiotic leakage and allowing the nebulized IMAMs to efficiently penetrate the bronchial mucus and biofilm. Inside the acidic biofilm, the polypeptide transforms into a cationic and rigid α helix, enhancing biofilm retention and unmasking the pores to release CAZ. Meanwhile, the polypeptide is conditionally activated to disrupt bacterial membranes and scavenge bacterial DNA, functioning as an adjuvant of CAZ to eradicate lung-colonizing bacteria and inhibiting Toll-like receptor 9 activation to foster inflammation resolution. This immunoantibacterial strategy may shift the current paradigm of COPD management.
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Affiliation(s)
- Junliang Zhu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Xiaohui Li
- Department of Thoracic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215002, China
| | - Yang Zhou
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Chenglong Ge
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Xudong Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Mengying Hou
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yuansong Wei
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yongbing Chen
- Department of Thoracic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215002, China
| | - Kam W. Leong
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Lichen Yin
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
- Department of Thoracic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215002, China
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Xu Y, Chen B, Xu L, Zhang G, Cao L, Liu N, Wang W, Qian H, Shao M. Urchin-like Fe 3O 4@Bi 2S 3 Nanospheres Enable the Destruction of Biofilm and Efficiently Antibacterial Activities. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3215-3231. [PMID: 38205800 DOI: 10.1021/acsami.3c17888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Biofilm-associated infections (BAIs) have been considered a major threat to public health, which induce persistent infections and serious complications. The poor penetration of antibacterial agents in biofilm significantly limits the efficiency of combating BAIs. Magnetic urchin-like core-shell nanospheres of Fe3O4@Bi2S3 were developed for physically destructing biofilm and inducing bacterial eradication via reactive oxygen species (ROS) generation and innate immunity regulation. The urchin-like magnetic nanospheres with sharp edges of Fe3O4@Bi2S3 exhibited propeller-like rotation to physically destroy biofilm under a rotating magnetic field (RMF). The mild magnetic hyperthermia improved the generation of ROS and enhanced bacterial eradication. Significantly, the urchin-like nanostructure and generated ROS could stimulate macrophage polarization toward the M1 phenotype, which could eradicate the persistent bacteria with a metabolic inactivity state through phagocytosis, thereby promoting the recovery of implant infection and inhibiting recurrence. Thus, the design of magnetic-driven sharp-shaped nanostructures of Fe3O4@Bi2S3 provided enormous potential in combating biofilm infections.
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Affiliation(s)
- Yaqian Xu
- Department of Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Benjin Chen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, Anhui, P. R. China
- Anhui Engineering Research Center for Medical Micro-Nano Devices, Hefei 230012, Anhui, P. R. China
| | - Lingling Xu
- Anhui Engineering Research Center for Medical Micro-Nano Devices, Hefei 230012, Anhui, P. R. China
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Guoqiang Zhang
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Limian Cao
- Department of Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Nian Liu
- Department of Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Wanni Wang
- Anhui Engineering Research Center for Medical Micro-Nano Devices, Hefei 230012, Anhui, P. R. China
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Haisheng Qian
- Anhui Engineering Research Center for Medical Micro-Nano Devices, Hefei 230012, Anhui, P. R. China
- School of Biomedical Engineering, Anhui Provincial Institute of Translational Medicine, Anhui Medical University, Hefei 230032, Anhui, P. R. China
| | - Min Shao
- Department of Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei 230032, Anhui, P. R. China
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