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Sanz del Olmo N, Molina N, Fan Y, Namata F, Hutchinson DJ, Malkoch M. Antibacterial Hydrogel Adhesives Based on Bifunctional Telechelic Dendritic-Linear-Dendritic Block Copolymers. J Am Chem Soc 2024; 146:17240-17249. [PMID: 38865148 PMCID: PMC11212050 DOI: 10.1021/jacs.4c03673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/13/2024]
Abstract
Antibiotic-resistant pathogens have been declared by the WHO as one of the major public health threats facing humanity. For that reason, there is an urgent need for materials with inherent antibacterial activity able to replace the use of antibiotics, and in this context, hydrogels have emerged as a promising strategy. Herein, we introduce the next generation of cationic hydrogels with antibacterial activity and high versatility that can be cured on demand in less than 20 s using thiol-ene click chemistry (TEC) in aqueous conditions. The approach capitalizes on a two-component system: (i) telechelic polyester-based dendritic-linear-dendritic (DLDs) block copolymers of different generations heterofunctionalized with allyl and ammonium groups, as well as (ii) polyethylene glycol (PEG) cross-linkers functionalized with thiol groups. These hydrogels resulted in highly tunable materials where the antibacterial performance can be adjusted by modifying the cross-linking density. Off-stoichiometric hydrogels showed narrow antibacterial activity directed toward Gram-negative bacteria. The presence of pending allyls opens up many possibilities for functionalization with biologically interesting molecules. As a proof-of-concept, hydrophilic cysteamine hydrochloride as well as N-hexyl-4-mercaptobutanamide, as an example of a thiol with a hydrophobic alkyl chain, generated three-component networks. In the case of cysteamine derivatives, a broader antibacterial activity was noted than the two-component networks, inhibiting the growth of Gram-positive bacteria. Additionally, these systems presented high versatility, with storage modulus values ranging from 270 to 7024 Pa and different stability profiles ranging from 1 to 56 days in swelling experiments. Good biocompatibility toward skin cells as well as strong adhesion to multiple surfaces place these hydrogels as interesting alternatives to conventional antibiotics.
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Affiliation(s)
- Natalia Sanz del Olmo
- Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Noemi Molina
- Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Yanmiao Fan
- Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Faridah Namata
- Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Daniel J. Hutchinson
- Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Michael Malkoch
- Department of Fibre and Polymer
Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
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2
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Muñoz-Sánchez S, Heredero-Bermejo I, de la Mata FJ, García-Gallego S. Bifunctional Carbosilane Dendrimers for the Design of Multipurpose Hydrogels with Antibacterial Action. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:266-274. [PMID: 38222939 PMCID: PMC10783294 DOI: 10.1021/acs.chemmater.3c02027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/29/2023] [Accepted: 11/29/2023] [Indexed: 01/16/2024]
Abstract
The emergence of antibiotic resistance is a serious global health problem. There is an incessant demand for new antimicrobial drugs and materials that can address this global issue from different angles. Dendritic hydrogels have appeared as a promising strategy. A family of bifunctional amphiphilic carbosilane dendrimers was designed and employed as nanosized cross-linking points for the synthesis of high-swelling hydrogels using the highly efficient Thiol-Ene click reaction for their preparation. Both stoichiometric and off-stoichiometric conditions were studied, generating hydrogels with pendant hydroxyl or alkene moieties. These hydrogels were found to be tunable antibacterial materials. They can easily be postmodified with relevant antibiotic moieties through covalent attachment on the hydroxyl or alkene pendant groups, generating ammonium-decorated networks with temperature and pH-responsive properties. Additionally, they can efficiently encapsulate drugs with poor solubility in water, like ciprofloxacin, and perform a sustained release over time, as demonstrated in preliminary assays against Staphylococcus aureus.
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Affiliation(s)
- Silvia Muñoz-Sánchez
- University
of Alcala, Department of Organic and Inorganic
Chemistry and Research Institute in Chemistry “Andrés
M. Del Río” (IQAR), 28805 Madrid, Spain
| | | | - Francisco Javier de la Mata
- University
of Alcala, Department of Organic and Inorganic
Chemistry and Research Institute in Chemistry “Andrés
M. Del Río” (IQAR), 28805 Madrid, Spain
- Networking
Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Institute
Ramón y Cajal for Health Research (IRYCIS), 28034 Madrid, Spain
| | - Sandra García-Gallego
- University
of Alcala, Department of Organic and Inorganic
Chemistry and Research Institute in Chemistry “Andrés
M. Del Río” (IQAR), 28805 Madrid, Spain
- Networking
Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Institute
Ramón y Cajal for Health Research (IRYCIS), 28034 Madrid, Spain
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3
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Gholivand K, Mohammadpour M, Derakhshankhah H, Samadian H, Aghaz F, Eshaghi Malekshah R, Rahmatabadi S. Composites based on alginate containing formylphosphazene-crosslinked chitosan and its Cu(II) complex as an antibiotic-free antibacterial hydrogel dressing with enhanced cytocompatibility. Int J Biol Macromol 2023; 253:127297. [PMID: 37813210 DOI: 10.1016/j.ijbiomac.2023.127297] [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: 05/18/2023] [Revised: 09/27/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023]
Abstract
Hydrogels based on chitosan or alginate biopolymers are believed to be desirable for covering skin lesions. In this research, we explored the potential of a new composite hydrogels series of sodium alginate (Alg) filled with cross-linked chitosan to use as hydrogel wound dressings. Cross-linked chitosan (CSPN) was synthesized by Schiff-base reaction with aldehydated cyclophosphazene, and its Cu(II) complex was manufactured and identified. Then, their powder suspension and Alg were transformed into hydrogel via ion-crosslinking with Ca2+. The hydrogel constituents were investigated by using FTIR, XRD, rheological techniques, and thermal analysis including TGA (DTG) and DSC. Moreover, structure optimization calculations were performed with the Material Studio 2017 program based on DFT-D per Dmol3 module. Examination of Alg's interactions with CSPN and CSPN-Cu using this module demonstrated that Alg molecules can be well adsorbed to the particle's surface. By changing the dosage of CSPN and CSPN-Cu, the number and size of pores, swelling rate, degradation behavior, protein absorption rate, cytotoxicity and blood compatibility were changed significantly. Subsequently, we employed erythromycin as a model drug to assess the entrapment efficiency, loading capacity, and drug release rate. FITC staining was selected to verify the hydrogels' intracellular uptake. Assuring the cytocompatibility of Alg-based hydrogels was approved by assessing the survival rate of fibroblast cells using MTT assay. However, the presence of Cu(II) in the developed hydrogels caused a significant antibacterial effect, which was comparable to the antibiotic-containing hydrogels. Our findings predict these porous, biodegradable, and mechanically stable hydrogels potentially have a promising future in the wound healing as antibiotic-free antibacterial dressings.
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Affiliation(s)
- Khodayar Gholivand
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Mahnaz Mohammadpour
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hossein Derakhshankhah
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hadi Samadian
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Faranak Aghaz
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | | | - Soheil Rahmatabadi
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Biscari G, Fan Y, Namata F, Fiorica C, Malkoch M, Palumbo FS, Pitarresi G. Antibacterial Broad-Spectrum Dendritic/Gellan Gum Hybrid Hydrogels with Rapid Shape-Forming and Self-Healing for Wound Healing Application. Macromol Biosci 2023; 23:e2300224. [PMID: 37590124 DOI: 10.1002/mabi.202300224] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/31/2023] [Indexed: 08/19/2023]
Abstract
Treating wound infections is a difficult task ever since pathogenic bacteria started to develop resistance to common antibiotics. The present study develops hybrid hydrogels based on the formation of a polyelectrolyte complex between the anionic charges of dopamine-functionalized Gellan Gum (GG-DA) and the cationic moieties of the TMP-G2-alanine dendrimer. The hydrogels thus obtained can be doubly crosslinked with CaCl2 , obtaining solid hydrogels. Or, by oxidizing dopamine to GG-DA, possibly causing further interactions such as Schiff Base and Michael addition to take place, hydrogels called injectables can be obtained. The latter have shear-thinning and self-healing properties (efficiency up to 100%). Human dermal fibroblasts (HDF), human epidermal keratinocytes (HaCaT), and mouse monocyte cells (RAW 264.7), after incubation with hydrogels, in most cases show cell viability up to 100%. Hydrogels exhibit adhesive behavior on various substrates, including porcine skin. At the same time, the dendrimer serves to crosslink the hydrogels and endows them with excellent broad-spectrum microbial eradication activity within four hours, evaluated using Staphylococcus aureus 2569 and Escherichia coli 178. Using the same GG-DA/TMP-G2-alanine ratios hybrid hydrogels with tunable properties and potential for wound dressing applications can be produced.
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Affiliation(s)
- Giuseppina Biscari
- KTH Royal Institute of Technology, Teknikringen 56-58, Stockholm, SE-100 44, Sweden
| | - Yanmiao Fan
- University of Palermo, Via Archirafi 32, Palermo, 90123, Italy
| | - Faridah Namata
- University of Palermo, Via Archirafi 32, Palermo, 90123, Italy
| | - Calogero Fiorica
- KTH Royal Institute of Technology, Teknikringen 56-58, Stockholm, SE-100 44, Sweden
| | - Michael Malkoch
- University of Palermo, Via Archirafi 32, Palermo, 90123, Italy
| | | | - Giovanna Pitarresi
- KTH Royal Institute of Technology, Teknikringen 56-58, Stockholm, SE-100 44, Sweden
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Chen J, Wang Z, Sun J, Zhou R, Guo L, Zhang H, Liu D, Rong M, Ostrikov KK. Plasma-Activated Hydrogels for Microbial Disinfection. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207407. [PMID: 36929325 DOI: 10.1002/advs.202207407] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/11/2023] [Indexed: 05/18/2023]
Abstract
A continuous risk from microbial infections poses a major environmental and public health challenge. As an emerging strategy for inhibiting bacterial infections, plasma-activated water (PAW) has proved to be highly effective, environmental-friendly, and non-drug resistant to a broad range of microorganisms. However, the relatively short lifetime of reactive oxygen and nitrogen species (RONS) and the high spreadability of liquid PAW inevitably limit its real-life applications. In this study, plasma-activated hydrogel (PAH) is developed to act as reactive species carrier that allow good storage and controlled slow-release of RONS to achieve long-term antibacterial effects. Three hydrogel materials, including hydroxyethyl cellulose (HEC), carbomer 940 (Carbomer), and acryloyldimethylammonium taurate/VP copolymer (AVC) are selected, and their antibacterial performances under different plasma activation conditions are investigated. It is shown that the composition of the gels plays the key role in determining their biochemical functions after the plasma activation. The antimicrobial performance of AVC is much better than that of PAW and the other two hydrogels, along with the excellent stability to maintain the antimicrobial activity for more than 14 days. The revealed mechanism of the antibacterial ability of the PAH identifies the unique combination of short-lived species (1 O2 , ∙OH, ONOO- and O2 - ) stored in hydrogels. Overall, this study demonstrates the efficacy and reveals the mechanisms of the PAH as an effective and long-term disinfectant capable of delivering and preserving antibacterial chemistries for biomedical applications.
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Affiliation(s)
- Jinkun Chen
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Zifeng Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Jiachen Sun
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Renwu Zhou
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Li Guo
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Hao Zhang
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Dingxin Liu
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Mingzhe Rong
- State Key Laboratory of Electrical Insulation and Power Equipment, Centre for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an City, 710049, People's Republic of China
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics, Centre for Materials Science, and Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
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Namata F, Sanz Del Olmo N, Molina N, Malkoch M. Synthesis and Characterization of Amino-Functional Polyester Dendrimers Based On Bis-MPA with Enhanced Hydrolytic Stability and Inherent Antibacterial Properties. Biomacromolecules 2023; 24:858-867. [PMID: 36689269 PMCID: PMC9930107 DOI: 10.1021/acs.biomac.2c01286] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Polyester dendrimers based on 2,2 bis(hydroxymethyl)propionic acid have been reported to be degradable, non-toxic, and exhibit good antimicrobial activity when decorated with cationic charges. However, these systems exhibit rapid depolymerization, from the outer layer inwards in physiological neutral pHs, which potentially restricts their use in biomedical applications. In this study, we present a new generation of amine functional bis-MPA polyester dendrimers with increased hydrolytic stability as well as antibacterial activity for Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) and Pseudomonas aeruginosa (P. aeruginosa) planktonic bacteria strains. These new derivatives show generally good cytocompatibility for the concentrations they are active toward bacteria, in monocyte/macrophage-like cells (Raw 264.7), and human dermal fibroblasts. Fluoride - promoted esterification chemistry, anhydride chemistry, and click reactions were utilized to produce a library from generations 1-3 and with cationic peripheral groups ranging from 6 to 24 groups, respectively. The dendrimers were successfully purified using conventional purification techniques as well as characterized by matrix-assisted laser desorption ionization time-of-flight mass spectroscopy, nuclear magnetic resonance, and size exclusion chromatography. As proof of synthetic versatility, dendritic-linear-dendritic block copolymer were successfully synthesized to display cysteamine peripheral functionalities as well as the scaffolding ability with biomedically relevant lipoic acid and methoxy polyethylene glycol.
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Affiliation(s)
- Faridah Namata
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Natalia Sanz Del Olmo
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Noemi Molina
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
| | - Michael Malkoch
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-68, 100 44 Stockholm, Sweden
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7
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Zhang Y, Håkansson J, Fan Y, Andrén OCJ, San Jacinto García J, Qin L, Umerska A, Hutchinson DJ, Lüchow M, Mahlapuu M, Malkoch M. Dendritic Nanogels Directed Dual-Encapsulation Topical Delivery System of Antimicrobial Peptides Targeting Skin Infections. Macromol Biosci 2023; 23:e2200433. [PMID: 36639138 DOI: 10.1002/mabi.202200433] [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: 10/15/2022] [Revised: 12/15/2022] [Indexed: 01/15/2023]
Abstract
Antimicrobial peptides (AMPs) are promising antibacterial agents in the fight against multidrug resistant pathogens. However, their application to skin infections is limited by the absence of a realizable topical delivery strategy. Herein, a hybrid hierarchical delivery system for topical delivery of AMPs is accomplished through the incorporation of AMPs into dendritic nanogels (DNGs) and their subsequent embedding into poloxamer gel. The high level of control over the crosslink density and the number of chosen functionalities makes DNGs ideal capsules with tunable loading capacity for DPK-060, a human kininogen-derived AMP. Once embedded into the poloxamer gel, DPK-060 encapsulated in DNGs displays a slower release rate compared to those entrapped directly in the gels. In vitro EpiDerm Skin Irritation Tests show good biocompatibility, while MIC and time-kill curves reveal the potency of the peptide toward Staphylococcus aureus. Anti-infection tests on ex vivo pig skin and in vivo mouse infection models demonstrate that formulations with 0.5% and 1% AMPs significantly inhibit the growth of S. aureus. Similar outcomes are observed for an in vivo mouse surgical site infection model. Importantly, when normalizing the bacteria inhibition to released/free DPK-060 at the wound site, all formulations display superior efficacy compared to DPK-060 in solution.
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Affiliation(s)
- Yuning Zhang
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden.,Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, Institute of Immunology, The First Hospital, Jilin University, Changchun, 130061, P. R. China
| | - Joakim Håkansson
- Biological Function Unit, RISE Research Institutes of Sweden, Methodology, Textile and Medical Devices, Borås, SE-501 15, Sweden.,Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, P.O. Box 440, Gothenburg, SE-40530, Sweden
| | - Yanmiao Fan
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Oliver C J Andrén
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Jorge San Jacinto García
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Liguo Qin
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden.,Institute of Design Science and Basic Components, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Anita Umerska
- Biological Function Unit, RISE Research Institutes of Sweden, Methodology, Textile and Medical Devices, Borås, SE-501 15, Sweden
| | - Daniel J Hutchinson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | - Mads Lüchow
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden
| | | | - Michael Malkoch
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden
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8
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A Self-Forming Hydrogel from a Bactericidal Copolymer: Synthesis, Characterization, Biological Evaluations and Perspective Applications. Int J Mol Sci 2022; 23:ijms232315092. [PMID: 36499417 PMCID: PMC9741259 DOI: 10.3390/ijms232315092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022] Open
Abstract
Objects touched by patients and healthcare workers in hospitals may harbor pathogens, including multi-drug resistant (MDR) staphylococci, enterococci (VRE), Escherichia coli, Acinetobacter, and Pseudomonas species. Medical devices contaminated by these pathogens may also act as a source of severe and difficult-to-treat human infections, thus becoming a critical public health concern requiring urgent resolutions. To this end, we recently reported the bactericidal effects of a cationic copolymer (CP1). Here, aiming at developing a bactericidal formulation possibly to be used either for surfaces disinfection or to treat skin infections, CP1 was formulated as a hydrogel (CP1_1.1-Hgel). Importantly, even if not cross-linked, CP1 formed the gel upon simple dispersion in water, without requiring gelling agents or other additives which could be skin-incompatible or interfere with CP1 bactericidal effects in possible future topical applications. CP1_1.1-Hgel was characterized by attenuated-total-reflectance Fourier transform infrared (ATR-FTIR) and UV-Vis spectroscopy, as well as optic and scanning electron microscopy (OM and SEM) to investigate its chemical structure and morphology. Its stability was assessed by monitoring its inversion properties over time at room temperature, while its mechanical characteristics were assessed by rheological experiments. Dose-dependent cytotoxicity studies performed on human fibroblasts for 24 h with gel samples obtained by diluting CP_1.1-Hgel at properly selected concentrations established that the 3D network formation did not significantly affect the cytotoxic profile of CP1. Also, microbiologic investigations carried out on two-fold serial dilutions of CP1-gel confirmed the minimum inhibitory concentrations (MICs) previously reported for the not formulated CP1.Selectivity indices values up to 12 were estimated by the values of LD50 and MICs determined here on gel samples.
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9
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Mutual Jellification of Two Bactericidal Cationic Polymers: Synthesis and Physicochemical Characterization of a New Two-Component Hydrogel. Pharmaceutics 2022; 14:pharmaceutics14112444. [PMID: 36432635 PMCID: PMC9692830 DOI: 10.3390/pharmaceutics14112444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/29/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Here, a new two-component hydrogel (CP1OP2-Hgel) was developed, simply by dispersing in water two cationic bactericidal polymers (CP1 and OP2) effective against several multidrug-resistant (MDR) clinical isolates of the most relevant Gram-positive and Gram-negative species. Interestingly, while OP2 acts only as an antibacterial ingredient when in gel, CP1 works as both an antibacterial and a gelling agent. To verify whether it would be worthwhile to use CP1 and OP2 as bioactive ingredients of a new hydrogel supposed for a future treatment of skin infections, dose-dependent cytotoxicity studies with CP1 and OP2 were performed on human fibroblasts for 24 h, before preparing the formulation. Although a significant cytotoxicity at concentrations > 2 µM was evidenced for both polymers, selectivity indices (SIs) over 12 (CP1) and up to six (OP2) were determined, due to the powerful antibacterial properties of the two polymers, thus supporting the rationale for their formulation as a hydrogel. The chemical structure and morphology of CP1OP2-Hgel were investigated by PCA-assisted attenuated total reflectance (ATR) Fourier-transform infrared (FTIR) analysis and scanning electron microscopy (SEM), while its rheological properties were assessed by determining its dynamic viscosity. The cumulative weight loss and swelling percentage curves, the porosity, and the maximum swelling capability of CP1OP2-Hgel were also determined and reported. Overall, due to the potent bactericidal effects of CP1 and OP2 and their favorable selectivity indices against several MDR pathogens, good rheological properties, high porosity, and strong swelling capability, CP1OP2-Hgel may, in the future, become a new weapon for treating severe nosocomial skin infections or infected chronic wounds. Further investigations in this sense are currently being carried out.
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10
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Kalelkar PP, Riddick M, García AJ. Biomaterial-based delivery of antimicrobial therapies for the treatment of bacterial infections. NATURE REVIEWS. MATERIALS 2022; 7:39-54. [PMID: 35330939 PMCID: PMC8938918 DOI: 10.1038/s41578-021-00362-4] [Citation(s) in RCA: 157] [Impact Index Per Article: 78.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
UNLABELLED The rise in antibiotic-resistant bacteria, including strains that are resistant to last-resort antibiotics, and the limited ability of antibiotics to eradicate biofilms, have necessitated the development of alternative antibacterial therapeutics. Antibacterial biomaterials, such as polycationic polymers, and biomaterial-assisted delivery of non-antibiotic therapeutics, such as bacteriophages, antimicrobial peptides and antimicrobial enzymes, have improved our ability to treat antibiotic-resistant and recurring infections. Biomaterials not only allow targeted delivery of multiple agents, but also sustained release at the infection site, thereby reducing potential systemic adverse effects. In this Review, we discuss biomaterial-based non-antibiotic antibacterial therapies for the treatment of community- and hospital-acquired infectious diseases, with a focus in in vivo results. We highlight the translational potential of different biomaterial-based strategies, and provide a perspective on the challenges associated with their clinical translation. Finally, we discuss the future scope of biomaterial-assisted antibacterial therapies. WEB SUMMARY The development of antibiotic tolerance and resistance has demanded the search for alternative antibacterial therapies. This Review discusses antibacterial biomaterials and biomaterial-assisted delivery of non-antibiotic therapeutics for the treatment of bacterial infectious diseases, with a focus on clinical translation.
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Affiliation(s)
- Pranav P. Kalelkar
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Milan Riddick
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Andrés J. García
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- author to whom correspondence should be addressed:
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11
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Li W, Zhao X, Huang T, Ren Y, Gong W, Guo Y, Wang J, Tu Q. Preparation of sodium hyaluronate/dopamine/AgNPs hydrogel based on the natural eutetic solvent as an antibaterial wound dressing. Int J Biol Macromol 2021; 191:60-70. [PMID: 34536470 DOI: 10.1016/j.ijbiomac.2021.09.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/05/2021] [Accepted: 09/10/2021] [Indexed: 12/23/2022]
Abstract
Baesd on previous researches, the natural deep eutectic solvent (DES) has enormous potential to be used in the fabrication of hydrogel wound dressing due to its outstanding properties including cytocompatibility, degradability and solubility. In order to further improve the antibaterial capacity of hydrogel, in the present study sodium hyaluronate (SH) and the natural DES were utilized to develop a novel hydrogel wound dressing by dopamine (DA) coated SH with in situ reduction of silver nanoparticles (DES-DASH@Ag). Furthermore, during the preparation process, we discovered for the first time that the DES can be used to fill the freeze-dried DASH to prepare a hydrogel (DES-DASH), which was promising to utilized in the fabrication of other hydrogels. Besides, the chemical and physical properties as well as wound healing capacity of the DES-DASH@Ag hydrogel were characterized. As a result, the DES-DASH@Ag hydrogel presented good cytocompatibility tested using NIH-3 T3 fibroblast cells, and prominent antibacterial effect against two types of bacteria infecting exposed wound. Furthermore, the hydrogel facilitated regeneration of mouse skin tissue in the wound area. The overall performance of DES-DASH@Ag hydrogel suggested that it could be a promising wound dressing in modern medicine.
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Affiliation(s)
- Wen Li
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xinyao Zhao
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Ting Huang
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yu Ren
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Wanxin Gong
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yuhui Guo
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Jinyi Wang
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Qin Tu
- College of Chemistry & Pharmacy and Life Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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12
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Fan Y, Mohanty S, Zhang Y, Lüchow M, Qin L, Fortuin L, Brauner A, Malkoch M. Dendritic Hydrogels Induce Immune Modulation in Human Keratinocytes and Effectively Eradicate Bacterial Pathogens. J Am Chem Soc 2021; 143:17180-17190. [PMID: 34636555 PMCID: PMC8532153 DOI: 10.1021/jacs.1c07492] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Indexed: 01/09/2023]
Abstract
Infections caused by antibiotic-resistant bacteria are globally a major threat, leading to high mortality rates and increased economic burden. Novel treatment strategies are therefore urgently needed by healthcare providers to protect people. Biomaterials that have inherent antibacterial properties and do not require the use of antibiotics present an attractive and feasible avenue to achieve this goal. Herein, we demonstrate the effect of a new class of cationic hydrogels based on amino-functional hyperbranched dendritic-linear-dendritic copolymers (HBDLDs) exhibiting excellent antimicrobial activity toward a wide range of clinical Gram-positive and Gram-negative bacteria, including drug-resistant strains isolated from wounds. Intriguingly, the hydrogels can induce the expression of the antimicrobial peptides RNase 7 and psoriasin, promoting host-mediated bacterial killing in human keratinocytes (HaCaT). Moreover, treatment with the hydrogels decreased the proinflammatory cytokine IL-1β, reactive nitrogen species (NO), and mitochondrial reactive oxygen species (ROS) in S. aureus-infected HaCaT cells, conjunctively resulting in reduced inflammation.
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Affiliation(s)
- Yanmiao Fan
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Soumitra Mohanty
- Department
of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-17165 Stockholm, Sweden
- Division
of Clinical Microbiology, Karolinska University
Hospital, Solna, Stockholm SE-17176, Sweden
| | - Yuning Zhang
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Mads Lüchow
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Liguo Qin
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
- Institute
of Design Science and Basic Components, Xían Jiaotong University, 710049 Xían, P. R. China
| | - Lisa Fortuin
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Annelie Brauner
- Department
of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-17165 Stockholm, Sweden
- Division
of Clinical Microbiology, Karolinska University
Hospital, Solna, Stockholm SE-17176, Sweden
| | - Michael Malkoch
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
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13
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Chen M, Grazon C, Sensharma P, Nguyen TT, Feng Y, Chern M, Baer RC, Varongchayakul N, Cook K, Lecommandoux S, Klapperich CM, Galagan JE, Dennis AM, Grinstaff MW. Hydrogel-Embedded Quantum Dot-Transcription Factor Sensors for Quantitative Progesterone Detection. ACS APPLIED MATERIALS & INTERFACES 2020; 12:43513-43521. [PMID: 32893612 DOI: 10.1021/acsami.0c13489] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Immobilization of biosensors in or on a functional material is critical for subsequent device development and translation to wearable technology. Here, we present the development and assessment of an immobilized quantum dot-transcription factor-nucleic acid complex for progesterone detection as a first step toward such device integration. The sensor, composed of a polyhistidine-tagged transcription factor linked to a quantum dot and a fluorophore-modified cognate DNA, is embedded within a hydrogel as an immobilization matrix. The hydrogel is optically transparent, soft, and flexible as well as traps the quantum dot-transcription factor DNA assembly but allows free passage of the analyte, progesterone. Upon progesterone exposure, DNA dissociates from the quantum dot-transcription factor DNA assembly resulting in an attenuated ratiometric fluorescence output via Förster resonance energy transfer. The sensor performs in a dose-dependent manner with a limit of detection of 55 nM. Repeated analyte measurements are similarly successful. Our approach combines a systematically characterized hydrogel as an immobilization matrix and a transcription factor-DNA assembly as a recognition/transduction element, offering a promising framework for future biosensor devices.
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Affiliation(s)
- Mingfu Chen
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Chloé Grazon
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- CNRS, Bordeaux INP, LCPO, UMR 5629, Univ. Bordeaux, F-33600 Pessac, France
| | - Prerana Sensharma
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Thuy T Nguyen
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Yunpeng Feng
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Margaret Chern
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - R C Baer
- Department of Microbiology, Boston University, Boston, Massachusetts 02118, United States
| | - Nitinun Varongchayakul
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Katherine Cook
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | | | - Catherine M Klapperich
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - James E Galagan
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Department of Microbiology, Boston University, Boston, Massachusetts 02118, United States
| | - Allison M Dennis
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Mark W Grinstaff
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
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14
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Guo L, Wang H, Wang Y, Liu F, Feng L. Organic Polymer Nanoparticles with Primary Ammonium Salt as Potent Antibacterial Nanomaterials. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21254-21262. [PMID: 31909588 DOI: 10.1021/acsami.9b19921] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bacterial infections induced by drug-resistant strains have become a global crisis. A membrane-disrupted mechanism is considered as an effective way to kill bacteria with little chance to trigger drug resistance. It is necessary to explore and develop new materials based on the membrane-disrupted mechanism to combat bacterial resistance. Here we report the design of organic nanoparticles based on a polymer (PDCP) as highly effective inhibition and bactericidal reagents. The PDCP is devised to have a hydrophobic skeleton and hydrophilic side chain modified with protonated primary amines, which could self-assemble to form organic nanoparticles (PDCP-NPs). By taking advantage of the large surface to volume ratio of nanoparticles, the synthesized PDCP-NPs have enriched positive charges and multiple membrane-binding sites. Research results display that PDCP-NPs have highly potent antibacterial activity in vitro and vivo, especially for Gram-negative bacteria with low toxicity against mammalian cells. This work design will inspire researchers to develop more membrane-disrupted bactericide and advance the applications of organic nanoparticles in the antibacterial area.
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Affiliation(s)
- Lixia Guo
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P.R. China
| | - Haoping Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P.R. China
| | - Yunxia Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P.R. China
| | - Feng Liu
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P.R. China
| | - Liheng Feng
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P.R. China
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