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Wang K, Dai P, Zhang N, Dong Y, Zhao B, Wang J, Zhang X, Tu Q. An injectable hydrogel based on sodium alginate and gelatin treats bacterial keratitis through multimodal antibacterial strategy. Int J Biol Macromol 2024; 275:133595. [PMID: 38960253 DOI: 10.1016/j.ijbiomac.2024.133595] [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: 01/30/2024] [Revised: 06/24/2024] [Accepted: 06/29/2024] [Indexed: 07/05/2024]
Abstract
Bacterial keratitis is among the most prevalent causes of blindness. Currently, the abuse of antibiotics in clinical settings not only lacks bactericidal effects but also readily induces bacterial resistance, making the clinical treatment of bacterial keratitis a significant challenge. In this study, we present an injectable hydrogel (GS-PNH-FF@CuS/MnS) containing self-assembled diphenylalanine dipeptide (FF) and CuS/MnS nanocomposites (CuS/MnS NCs) that destroy bacterial cell walls through a synergistic combination of mild photothermal therapy (PTT), chemodynamic therapy (CDT), ion release chemotherapy, and self-assembled dipeptide contact, thereby eliminating Pseudomonas aeruginosa. Under 808 nm laser irradiation, the bactericidal efficiency of GS-PNH-FF@CuS/MnS hydrogel against P. aeruginosa in vitro reach up to 96.97 %. Furthermore, GS-PNH-FF@CuS/MnS hydrogel is applied topically to kill bacteria, reduce inflammation, and promote wound healing. Hematoxylin-eosin (H&E) staining, Masson staining, immunohistochemistry and immunofluorescence staining are used to evaluate the therapeutic effect on infected rabbit cornea models in vivo. The GS-PNH-FF@CuS/MnS demonstrate good biocompatibility with human corneal epithelial cells and exhibit no obvious eyes side effects. In conclusion, the GS-PNH-FF@CuS/MnS hydrogel in this study provides an effective and safe treatment strategy for bacterial keratitis through a multimodal approach.
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Affiliation(s)
- Keke Wang
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Pengxiu Dai
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Nannan Zhang
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuchuan Dong
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Bin Zhao
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jinyi Wang
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Xinke Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Qin Tu
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Lyu P, Ding Z, Man X. Accelerating the stimuli-responsive bending of a gel using mechanical constraints. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2023; 46:40. [PMID: 37266790 DOI: 10.1140/epje/s10189-023-00303-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/22/2023] [Indexed: 06/03/2023]
Abstract
Gel bends in response to external stimuli, which has important technical applications ranging from artificial muscle to drug delivery. Here, we predict a simple and effective method to accelerate the bending of gel using mechanical constraints. We propose an exact theory of the bending dynamics of gel, which gives analytical solutions for the time evolution of the gel curvature and the relaxation time with which the system approaches to its final equilibrium state. The theory shows that the relaxation time of a slender gel confined between two parallel and rigid plates is smaller than it of a free gel with no constraints, indicating that gel bends faster when swollen in the direction parallel to the two confined plates by adding more mechanical constraints. The advantages of this new method is no need to change the microstructure and components of gel itself as previous methods. This finding brings valuable approach in designing soft robotics and healthcare devices, and is subject to experimental test.
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Affiliation(s)
- Peihan Lyu
- Center of Soft Matter Physics and its Applications, School of Physics, Beihang University, Beijing, 100191, China
| | - Zhaoyu Ding
- Center of Soft Matter Physics and its Applications, School of Physics, Beihang University, Beijing, 100191, China
| | - Xingkun Man
- Center of Soft Matter Physics and its Applications, School of Physics, Beihang University, Beijing, 100191, China.
- Peng Huanwu Collaborative Center for Research and Education, Beihang University, Beijing, 100191, China.
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Sun Q, Yang Z, Qi X. Design and Application of Hybrid Polymer-Protein Systems in Cancer Therapy. Polymers (Basel) 2023; 15:polym15092219. [PMID: 37177365 PMCID: PMC10181109 DOI: 10.3390/polym15092219] [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: 02/28/2023] [Revised: 04/29/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023] Open
Abstract
Polymer-protein systems have excellent characteristics, such as non-toxic, non-irritating, good water solubility and biocompatibility, which makes them very appealing as cancer therapeutics agents. Inspiringly, they can achieve sustained release and targeted delivery of drugs, greatly improving the effect of cancer therapy and reducing side effects. However, many challenges, such as reducing the toxicity of materials, protecting the activities of proteins and controlling the release of proteins, still need to be overcome. In this review, the design of hybrid polymer-protein systems, including the selection of polymers and the bonding forms of polymer-protein systems, is presented. Meanwhile, vital considerations, including reaction conditions and the release of proteins in the design process, are addressed. Then, hybrid polymer-protein systems developed in the past decades for cancer therapy, including targeted therapy, gene therapy, phototherapy, immunotherapy and vaccine therapy, are summarized. Furthermore, challenges for the hybrid polymer-protein systems in cancer therapy are exemplified, and the perspectives of the field are covered.
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Affiliation(s)
- Qi Sun
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing 100069, China
- Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing 100069, China
| | - Zhenzhen Yang
- Drug Clinical Trial Center, Peking University Third Hospital, Peking University, Beijing 100191, China
- Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing 100191, China
| | - Xianrong Qi
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
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4
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Recent Advances in Smart Hydrogels Prepared by Ionizing Radiation Technology for Biomedical Applications. Polymers (Basel) 2022; 14:polym14204377. [PMID: 36297955 PMCID: PMC9608571 DOI: 10.3390/polym14204377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/27/2022] [Accepted: 10/12/2022] [Indexed: 11/23/2022] Open
Abstract
Materials with excellent biocompatibility and targeting can be widely used in the biomedical field. Hydrogels are an excellent biomedical material, which are similar to living tissue and cannot affect the metabolic process of living organisms. Moreover, the three-dimensional network structure of hydrogel is conducive to the storage and slow release of drugs. Compared to the traditional hydrogel preparation technologies, ionizing radiation technology has high efficiency, is green, and has environmental protection. This technology can easily adjust mechanical properties, swelling, and so on. This review provides a classification of hydrogels and different preparation methods and highlights the advantages of ionizing radiation technology in smart hydrogels used for biomedical applications.
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Fabrication, optimization and characterization of preformed-particle-gel containing nanogel particles for conformance control in oil reservoirs. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03843-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kuruwita Mudiyanselage T, Weerasinghe N, Karunaratna M, Withanage N. Highly porous double network hydrogel having fast responding time and high mechanical strength via emulsion template polymerization. J Appl Polym Sci 2022. [DOI: 10.1002/app.53048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Nimesha Weerasinghe
- Department of Polymer Science, Faculty of Applied Sciences University of Sri Jayewardenepura Nugegoda Sri Lanka
| | - Madara Karunaratna
- Department of Polymer Science, Faculty of Applied Sciences University of Sri Jayewardenepura Nugegoda Sri Lanka
| | - Niroshan Withanage
- Department of Statistics, Faculty of Applied Sciences University of Sri Jayewardenepura Nugegoda Sri Lanka
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Xiao Q, Cui Y, Meng Y, Guo F, Ruan X, He G, Jiang X. PNIPAm hydrogel composite membrane for high-throughput adsorption of biological macromolecules. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Naseri E, Ahmadi A. A review on wound dressings: Antimicrobial agents, biomaterials, fabrication techniques, and stimuli-responsive drug release. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111293] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Shen H, Lin Q, Tang H, Tian Y, Zhang X. Fabrication of Temperature- and Alcohol-Responsive Photonic Crystal Hydrogel and Its Application for Sustained Drug Release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3785-3794. [PMID: 35298167 DOI: 10.1021/acs.langmuir.1c03378] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Herein, crack-free photonic crystal templates with enhanced color contrast were first demonstrated by the coassembly of polystyrene (PS) microspheres and graphene oxide (GO). Then, photonic crystal hydrogels (PCHs) with quick responses to temperature and alcohol solution concentration changes were fabricated by photopolymerization of monomers in the gaps of the self-assembled colloidal crystal templates. The structural color of the PCHs changed from yellow to blue within 120 s as the temperature rose from 25 to 40 °C, whereas upon a decrease in temperature from 40 to 25 °C, the structural color changed from blue to yellow. The structural color of the PCHs also shows an obvious response with the concentration of alcohol solution ranging from 40 to 100 wt %. The quick responses of the PCHs' structural color to changes in temperature and alcohol solution concentration are attributed to the temperature sensitivity of poly(N-isopropylacrylamide) and preferential adsorption and swelling of the alcohol solution for the polymer chains. Furthermore, moxifloxacin (Mox) was loaded into PCHs by hydrogel swelling and exhibited sustained released by increasing the temperature. The sustained release process was facilely monitored by observing the corresponding color changes in real time. The rapid and visible response offers the fabricated PCHs great potential application prospects in the semiquantitative analysis of alcohol concentration and intelligent drug delivery.
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Affiliation(s)
- Huifang Shen
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Qian Lin
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Huachun Tang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Yuqin Tian
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Xinya Zhang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
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Stamou A, Iatrou H, Tsitsilianis C. NIPAm-Based Modification of Poly(L-lysine): A pH-Dependent LCST-Type Thermo-Responsive Biodegradable Polymer. Polymers (Basel) 2022; 14:polym14040802. [PMID: 35215715 PMCID: PMC8962975 DOI: 10.3390/polym14040802] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 11/16/2022] Open
Abstract
Polylysine is a biocompatible, biodegradable, water soluble polypeptide. Thanks to the pendant primary amines it bears, it is susceptible to modification reactions. In this work Poly(L-lysine) (PLL) was partially modified via the effortless free-catalysed aza-Michael addition reaction at room temperature by grafting N-isopropylacrylamide (NIPAm) moieties onto the amines. The resulting PLL-g-NIPAm exhibited LCST-type thermosensitivity. The LCST can be tuned by the NIPAm content incorporated in the macromolecules. Importantly, depending on the NIPAm content, LCST is highly dependent on pH and ionic strength due to ionization capability of the remaining free lysine residues. PLL-g-NIPAm constitutes a novel biodegradable LCST polymer that could be used as “smart” block in block copolymers and/or terpolymers, of any macromolecular architecture, to design pH/Temperature-responsive self-assemblies (nanocarriers and/or networks) for potential bio-applications.
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Affiliation(s)
- Aggeliki Stamou
- Department of Chemical Engineering, University of Patras, 26500 Patras, Greece;
| | - Hermis Iatrou
- Department of Chemistry, University of Athens, Panepistimiopolis, Zografou, 15771 Athens, Greece;
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