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Zhang Y, Li A, Zhang Y, Hong S, Xue Y, Song X, Li J, Huang S, Zhang X. Bacteria-Targeting Nanosilver-Based Antibacterial Drugs for Efficient Treatment of Drug-Resistant Bacterial-Infected Keratitis. Macromol Rapid Commun 2023; 44:e2300379. [PMID: 37673414 DOI: 10.1002/marc.202300379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/01/2023] [Indexed: 09/08/2023]
Abstract
Keratitis caused by drug-resistant bacteria is a severe condition that can lead to corneal perforation and even blindness, making effective treatment a top priority amid growing antibiotic resistance. Eye drops for anti-inflammatory treatment necessitate frequent administration of high doses throughout every day due to bacterial resistance resulting from antibiotic overuse and the low bioavailability of drugs. To overcome these issues, an antibacterial nanocomposite is prepared via conjugating random copolymers of galactose and 3-(acrylamide)phenylboronic acid to the surface of silver nanoparticles. The customized nanocomposites trigger specific binding to bacteria, resulting in excellent retention of the drug on the ocular surface, resulting in rapid and powerful killing of bacteria and inhibition of bacterial proliferation. Due to its superior drug delivery capabilities to the ocular surface, the functionalized nanocomplex markedly amplifies the anti-inflammatory efficacy, even at low doses. This effect is achieved by impeding immune cell infiltration and diminishing the synthesis of inflammatory mediators and cytokines, thereby suggesting enhanced healing properties for corneal inflammation. This study demonstrates a promising nanocomposite which is an effective and safe antibacterial strategy for bacterial keratitis with favorable prognostic and clinical conversion potential.
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Affiliation(s)
- Yufei Zhang
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Anran Li
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Ye Zhang
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Shihao Hong
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yun Xue
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xianhui Song
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Jie Li
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Siyuan Huang
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xinge Zhang
- Nankai University Eye Institute, Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
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2
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Kong X, Jia Y, Wang H, Li R, Li C, Cheng S, Chen T, Mai Y, Nie Y, Deng Y, Xie Z, Liu Y. Effective Treatment of Haemophilus influenzae-Induced Bacterial Conjunctivitis by a Bioadhesive Nanoparticle Reticulate Structure. ACS APPLIED MATERIALS & INTERFACES 2023; 15:22892-22902. [PMID: 37154428 DOI: 10.1021/acsami.3c01308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Ocular formulations should provide an effective antibiotic concentration at the site of infection to treat bacterial eye infections. However, tears and frequent blinking accelerate the drug clearance rate and limit drug residence time on the ocular surface. This study describes a biological adhesion reticulate structure (BNP/CA-PEG) consisting of antibiotic-loaded bioadhesion nanoparticles (BNP/CA), with an average 500-600 nm diameter, and eight-arm NH2-PEG-NH2 for local and extended ocular drug delivery. This retention-prolonging effect is a function of the Schiff base reaction between groups on the surface of BNP and amidogen on PEG. BNP/CA-PEG showed significantly higher adhesion properties and better treatment efficacy in an ocular rat model with conjunctivitis in comparison to non-adhesive nanoparticles, BNP, or free antibiotics. Both in vivo safety experiment and in vitro cytotoxicity test verified the biocompatibility and biosafety of the biological adhesion reticulate structure, indicating a promising translational prospect for further clinical use.
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Affiliation(s)
- Xiaohan Kong
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Yizhen Jia
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Han Wang
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Rui Li
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Chujie Li
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Shihong Cheng
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Tian Chen
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Yang Mai
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Yichu Nie
- Clinical Research Institute, The First People's Hospital of Foshan, Foshan 528000, China
| | - Yang Deng
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Zhiyong Xie
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China
| | - Yang Liu
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China
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Wang H, Li F, Yong Y, Lv M, Liu C, Xu Q, Du G, Xie J, You Y, Xiao J, Jiang G. A novel full solar light spectrum responsive antimicrobial agent of WS 2 quantum dots for photocatalytic wound healing therapy. J Mater Chem B 2023; 11:914-924. [PMID: 36598013 DOI: 10.1039/d2tb01766k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Photocatalytic antimicrobial therapy (PCAT) is considered to be a potential therapeutic treatment for bacterial-infection diseases. However, the antibacterial efficiency is unsatisfactory due to the limited application scope of photocatalysis. In this work, full-spectrum responsive tungsten disulfide quantum dots (WS2 QDs) are prepared for killing bacteria and enabling wound healing through photocatalytic reactive oxygen species (ROS) generation and glutathione (GSH) depletion. On the one hand, these ultrasmall WS2 QDs exhibit an excellent full spectrum (UV-Vis-NIR)-responsive photocatalytic effect by hindering the recombination of electron-hole pairs, thereby achieving the full use of the energy spectrum. Furthermore, the full-spectrum photocatalytic property of the as-prepared WS2 QDs can be effectively strengthened by redox reaction to deplete GSH for accelerated wound healing. In a word, the as-prepared nanoplatform exhibits the ability to act as an admirable antibacterial reagent with full-spectrum catalytic performance for photocatalytic wound healing therapy. Therefore, this work will not only provide an effective full-spectrum photocatalytic reagent for anti-bacteria therapy and wound healing, but also provide a rational idea for the development of other novel antibacterial agents for applications in the biomedical field.
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Affiliation(s)
- Huan Wang
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China. .,Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Fanghan Li
- The Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chengdu Medical College, Faculty of medicine, Chengdu, 610500, China.
| | - Yuan Yong
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China. .,Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Mingzhu Lv
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China. .,Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Chenghui Liu
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China. .,Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Qiqi Xu
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China. .,Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Guobo Du
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong, 637000, China
| | - Jiani Xie
- College of Pharmacy and Biological Engineering, Chengdu University, Chengdu, 610106, China
| | - Yong You
- Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China. .,Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Jiangwei Xiao
- The Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chengdu Medical College, Faculty of medicine, Chengdu, 610500, China.
| | - Guohui Jiang
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, Institute of neurological diseases, North Sichuan Medical College, Nanchong, 637000, China.
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Zhang Z, Wen J, Zhang J, Guo D, Zhang Q. Vacancy-Modulated of CuS for Highly Antibacterial Efficiency via Photothermal/Photodynamic Synergetic Therapy. Adv Healthc Mater 2023; 12:e2201746. [PMID: 36303519 DOI: 10.1002/adhm.202201746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/08/2022] [Indexed: 02/03/2023]
Abstract
Cu-based nanomaterials have been developed to alleviate the problem of antibiotic resistance due to their superior properties and good biocompatibility. Defects in nanomaterials have a major role in improving photocatalytic performance. Herein, two CuS nanospheres with predominant VCuSCu and VCuSS vacancy (abbreviated as CuS and CuS-T150, respectively) characterized by positron annihilation spectra are synthesized. The combination of experimental and theoretical calculation results demonstrates that CuS-T150 exhibits excellent antibacterial, achieving bactericidal rates of 99.9% against to Escherichia coli (E. coli) under 808 nm laser irradiation. Compared with CuS, the superior antimicrobial activity of CuS-T150 is mainly attributed to its stronger ability to adsorb oxygen molecules, more easily bind with surface of E. coli, and higher photothermal conversion efficiency (PTCE). This work provides a deeper understanding of nanomaterials with vacancy modulated the antibacterial efficiency by synergistic effect of photodynamic and photothermal therapy.
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Affiliation(s)
- Zhihao Zhang
- College of Environment and Resource, Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan, 030006, China.,Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China
| | - Jinghong Wen
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China
| | - Jie Zhang
- College of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Donggang Guo
- College of Environment and Resource, Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan, 030006, China
| | - Quanxi Zhang
- College of Environment and Resource, Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan, 030006, China.,Institute of Environmental Science, Shanxi University, Taiyuan, 030006, China
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All-small-molecule supramolecular hydrogels assembled from guanosine 5'-monophosphate disodium salt and tobramycin for the treatment of bacterial keratitis. Bioact Mater 2022; 16:293-300. [PMID: 35386321 PMCID: PMC8965694 DOI: 10.1016/j.bioactmat.2021.12.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 11/26/2022] Open
Abstract
Bacterial keratitis is the most common corneal infection which may lead to blindness, and seriously threatened the human visual health worldwide. Clinical treatment with antibiotic eye drops formulation usually falls in low bioavailability and poor therapeutic efficiency. Hydrogel has gained much attention as ophthalmic formulation recently due to the prolonged drug retention on ocular surface. In this study, we proposed a type of all-small-molecule supramolecular hydrogel assembled from guanosine-5′-monophosphate disodium salt and tobramycin for the treatment of bacterial keratitis. Guanosine-5′-monophosphate disodium salt assembled into guanosine-quartet nanofibers via hydrogen bonding and π-π stacking, and tobramycin with five primary amine groups further crosslinked the nanofibers bearing multiple phosphate moieties into gel networks via ionic interactions. The supramolecular gel showed shear thinning and thixotropic properties, good biocompatibility, and antibacterial activity. The gel treatment significantly ameliorated P. aeruginosa induced bacterial keratitis, and showed higher therapeutic efficacy compared to tobramycin eye drop. This study provides a facile and efficient antibiotic gel formulation for clinical treatment of bacterial keratitis. A type of all-small-molecule supramolecular hydrogel was assembled from 5′-GMP and tobramycin via ionic interactions. The prepared gel showed good transparency, thixotropic property, biocompatibility, and sustained drug release. The hydrogel showed higher therapeutic efficacy of P. aeruginosa induced bacterial keratitis compared to tobramycin eye drop.
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Tang Z, Fan X, Chen Y, Gu P. Ocular Nanomedicine. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2003699. [PMID: 35150092 PMCID: PMC9130902 DOI: 10.1002/advs.202003699] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/31/2021] [Indexed: 05/07/2023]
Abstract
Intrinsic shortcomings associated with conventional therapeutic strategies often compromise treatment efficacy in clinical ophthalmology, prompting the rapid development of versatile alternatives for satisfactory diagnostics and therapeutics. Given advances in material science, nanochemistry, and nanobiotechnology, a broad spectrum of functional nanosystems has been explored to satisfy the extensive requirements of ophthalmologic applications. In the present review, the recent progress in nanosystems, both conventional and emerging nanomaterials in ophthalmology from state-of-the-art studies, are comprehensively examined and the role of their fundamental physicochemical properties in bioavailability, tissue penetration, biodistribution, and elimination after interacting with the ophthalmologic microenvironment emphasized. Furthermore, along with the development of surface engineering of nanomaterials, emerging theranostic methodologies are promoted as potential alternatives for multipurpose ocular applications, such as emerging biomimetic ophthalmology (e.g., smart electrochemical eye), thus provoking a holistic review of "ocular nanomedicine." By affording insight into challenges encountered by ocular nanomedicine and further highlighting the direction of future studies, this review provides an incentive for enriching ocular nanomedicine-based fundamental research and future clinical translation.
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Affiliation(s)
- Zhimin Tang
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghai200011P. R. China
| | - Xianqun Fan
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghai200011P. R. China
| | - Yu Chen
- Materdicine LabSchool of Life SciencesShanghai UniversityShanghai200444P. R. China
| | - Ping Gu
- Department of OphthalmologyShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of Orbital Diseases and Ocular OncologyShanghai200011P. R. China
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Xu W, Qing X, Liu S, Chen Z, Zhang Y. Manganese oxide nanomaterials for bacterial infection detection and therapy. J Mater Chem B 2022; 10:1343-1358. [PMID: 35129557 DOI: 10.1039/d1tb02646a] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bacterial infection has received substantial attention and poses a serious threat to human health. Although antibiotics can effectively fight against bacterial infection, the occurrence of antibiotic resistance has become increasingly serious in recent years, which tremendously hinders its clinical application. Consequently, it is urgent to explore novel strategies to achieve efficacious treatment of bacterial diagnosis and detection. Manganese dioxide (MnO2) nanomaterial has been extensively reported in tumor therapy. Nevertheless, there are few antibacterial reviews of MnO2. Herein, we will discuss the applications of MnO2 in the detection and treatment of bacterial infection, including photodynamic therapy, immunotherapy, improvement of hypoxia, dual-modal combination therapy, reactive oxygen species scavenging, magnetic resonance imaging, optical application of acoustic imaging, and so forth. This review is expected to provide meaningful guidance on further research of MnO2 nanomaterial for antibacterial applications.
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Affiliation(s)
- Wenjing Xu
- Medical School, Southeast University, Nanjing 210009, China.
| | - Xin Qing
- Medical School, Southeast University, Nanjing 210009, China.
| | - Shengli Liu
- Hepatopancreatobiliary Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 210009, China.
| | - Zhencheng Chen
- School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China.
| | - Yewei Zhang
- Medical School, Southeast University, Nanjing 210009, China. .,Hepatopancreatobiliary Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 210009, China.
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Asghar S, Khan IU, Salman S, Khalid SH, Ashfaq R, Vandamme TF. Plant-derived nanotherapeutic systems to counter the overgrowing threat of resistant microbes and biofilms. Adv Drug Deliv Rev 2021; 179:114019. [PMID: 34699940 DOI: 10.1016/j.addr.2021.114019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/03/2021] [Accepted: 10/19/2021] [Indexed: 12/17/2022]
Abstract
Since antiquity, the survival of human civilization has always been threatened by the microbial infections. An alarming surge in the resistant microbial strains against the conventional drugs is quite evident in the preceding years. Furthermore, failure of currently available regimens of antibiotics has been highlighted by the emerging threat of biofilms in the community and hospital settings. Biofilms are complex dynamic composites rich in extracellular polysaccharides and DNA, supporting plethora of symbiotic microbial life forms, that can grow on both living and non-living surfaces. These enforced structures are impervious to the drugs and lead to spread of recurrent and non-treatable infections. There is a strong realization among the scientists and healthcare providers to work out alternative strategies to combat the issue of drug resistance and biofilms. Plants are a traditional but rich source of effective antimicrobials with wider spectrum due to presence of multiple constituents in perfect synergy. Other than the biocompatibility and the safety profile, these phytochemicals have been repeatedly proven to overcome the non-responsiveness of resistant microbes and films via multiple pathways such as blocking the efflux pumps, better penetration across the cell membranes or biofilms, and anti-adhesive properties. However, the unfavorable physicochemical attributes and stability issues of these phytochemicals have hampered their commercialization. These issues of the phytochemicals can be solved by designing suitably constructed nanoscaled structures. Nanosized systems can not only improve the physicochemical features of the encapsulated payloads but can also enhance their pharmacokinetic and therapeutic profile. This review encompasses why and how various types of phytochemicals and their nanosized preparations counter the microbial resistance and the biofouling. We believe that phytochemical in tandem with nanotechnological innovations can be employed to defeat the microbial resistance and biofilms. This review will help in better understanding of the challenges associated with developing such platforms and their future prospects.
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Ma L, Li K, Xia J, Chen C, Liu Y, Lang S, Yu L, Liu G. Commercial soft contact lenses engineered with zwitterionic silver nanoparticles for effectively treating microbial keratitis. J Colloid Interface Sci 2021; 610:923-933. [PMID: 34863555 DOI: 10.1016/j.jcis.2021.11.145] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 12/11/2022]
Abstract
The introduction of various drugs onto commercial soft contact lenses (CLs) has emerged as a potentially effective strategy for treating microbial keratitis (MK) because drug-loaded CLs can maintain a controlled drug concentration which leaded to enhanced drug bioavailability and reduced side effects in ocular tissues. In this study, silver nanoparticles modified with zwitterionic poly (carboxybetaine-co-dopamine methacrylamide) copolymer (PCBDA@AgNPs) as novel anti-infective therapeutics were prepared and firmly immobilized onto soft CLs through mussel-inspired surface chemistry. The obtained PCBDA@AgNPs coated CL (PCBDA@AgNPs-CL) remained the excellent transparency of commercial CLs and exhibited strong and broad-spectrum antimicrobial activities. We systematically explored the mechanism and found that the functional CLs can effectively inhibit the growth of microbial biofilms via a synergic "resist-kill-remove" strategy due to the zwitterionic surface and sustained release of silver ions. Significantly, in vitro cell cytotoxicity and in vivo subcutaneous implantation experiments proved the significant biosafety of PCBDA@AgNPs-CL. Furthermore, PCBDA@AgNPs-CL was successfully employed for the in vivo treatment of MK rabbit models, demonstrating excellent abilities to eradicate microbe-induced ocular infections and to prevent the destruction and irreversible structural alterations of corneal tissues. Collectively, PCBDA@AgNPs-CL is therefore a highly promising therapeutic device to significantly boost the efficacy for MK treatment.
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Affiliation(s)
- Li Ma
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China; College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Kaijun Li
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Jiali Xia
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Chaojian Chen
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Yuqi Liu
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Shiying Lang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, China
| | - Ling Yu
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
| | - Gongyan Liu
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China; College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China; National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, China.
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