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Ai S, Gao Q, Cheng G, Zhong P, Cheng P, Ren Y, Wang H, Zhu X, Guan S, Qu X. Construction of an Injectable Composite Double-Network Hydrogel as a Liquid Embolic Agent. Biomacromolecules 2024; 25:2052-2064. [PMID: 38426456 DOI: 10.1021/acs.biomac.3c01437] [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: 03/02/2024]
Abstract
Conventional embolists disreputably tend to recanalization arising from the low filling ratio due to their rigidity or instability. As a result, intelligent hydrogels with a tunable modulus may meaningfully improve the therapeutic efficacy. Herein, an injectable composite double-network (CDN) hydrogel with high shear responsibility was prepared as a liquid embolic agent by cross-linking poly(vinyl alcohol) (PVA) and carboxymethyl chitosan (CMC) via dynamic covalent bonding of borate ester and benzoic-imine. A two-dimensional nanosheet, i.e., layered double hydroxide (LDH), was incorporated into the network through physical interactions which led to serious reduction of yield stress for the injection of the hydrogel and the capacity for loading therapeutic agents like indocyanine green (ICG) and doxorubicin (DOX) for the functions of photothermal therapy (PTT) and chemotherapy. The CDN hydrogel could thus be transported through a thin catheter and further in situ strengthened under physiological conditions, like in blood, by secondarily cross-linking with phosphate ions for longer degradation duration and better mechanical property. These characteristics met the requirements of arterial interventional embolization, which was demonstrated by renal embolism operation on rabbits, and meanwhile favored the inhibition of subcutaneous tumor growth on an animal model. Therefore, this work makes a breakthrough in the case of largely reducing the embolism risks, thus affording a novel generation for interventional embolization.
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Affiliation(s)
- Shili Ai
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Qinzong Gao
- Key Laboratory of Carcinogenesis and Translational Research, Peking University Cancer Hospital and Institute, Beijing 100142, China
| | - Gele Cheng
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408, China
- Duke Kunshan University, Suzhou, Jiangsu 215316, China
| | - Pengfei Zhong
- Hebei North University, Zhangjiakou, Hebei 075000, China
| | - Peiyu Cheng
- Department of Oncology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing 100010, China
| | - Yingying Ren
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Hao Wang
- Department of Oncology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing 100010, China
| | - Xu Zhu
- Key Laboratory of Carcinogenesis and Translational Research, Peking University Cancer Hospital and Institute, Beijing 100142, China
| | - Shanyue Guan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaozhong Qu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408, China
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Chen J, Chen D, Chen J, Shen T, Jin T, Zeng B, Li L, Yang C, Mu Z, Deng H, Cai X. An all-in-one CO gas therapy-based hydrogel dressing with sustained insulin release, anti-oxidative stress, antibacterial, and anti-inflammatory capabilities for infected diabetic wounds. Acta Biomater 2022; 146:49-65. [PMID: 35500813 DOI: 10.1016/j.actbio.2022.04.043] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/24/2022] [Accepted: 04/26/2022] [Indexed: 12/16/2022]
Abstract
To effectively treat diabetic wounds, the development of versatile medical dressings that can long-term regulate blood glucose and highly effective anti-oxidative stress, antibacterial and anti-inflammatory are critical. Here, an all-in-one CO gas-therapy-based versatile hydrogel dressing (ICOQF) was developed via the dynamic Schiff base reaction between the amino groups on quaternized chitosan (QCS) and the aldehyde groups on benzaldehyde-terminated F108 (F108-CHO) micelles. CORM-401 (an oxidant-sensitive CO-releasing molecules) was encapsulated in the hydrophobic core of F108-CHO micelles and insulin was loaded in the three-dimensional network structure of ICOQF. The dynamic Schiff base bonds not only endowed ICOQF with good tissue adhesion, injectability and self-healing, but also gave it sustained and controllable insulin release ability. In addition, ICOQF could quickly generate CO in inflamed wound tissue by consuming reactive oxygen species. The generated CO could effectively anti-oxidative stress by activating the expression of heme oxygenase; antibacterial by inducing the rupture of bacterial cell membranes and mitochondrial dysfunction and inhibiting the synthesis of adenosine triphosphate; and anti-inflammatory by inhibiting the proliferation of activated macrophages and promoting the polarization of the M1 phenotype to the M2 phenotype. Due to these outstanding properties, ICOQF significantly promoted the healing of STZ-induced MRSA-infected diabetic wounds accompanied by good biocompatibility. This study clearly shows that ICOQF is a versatile hydrogel dressing with great application potential for the management of diabetic wounds. STATEMENT OF SIGNIFICANCE: The development of some versatile hydrogel dressings that can not only provide a prolonged and controlled insulin release property but also utilize a non-antibiotic treatment modality for highly effective antibacterial, anti-inflammatory, and anti-oxidative stress effects is vital for the successful treatment of diabetic wounds. Herein, we developed an all-in-one CO gas-therapy-based versatile hydrogel dressing (ICOQF) with sustained and controllable insulin release abilities. Moreover, ICOQF could not only quickly release CO in the inflamed wound tissue by consumption of reactive oxygen species but also utilize the generated CO to highly effectively anti-oxidative stress, antibacterial, and anti-inflammatory. ICOQF therapy substantially promoted the healing of STZ-induced MRSA-infected diabetic wounds. Overall, this work provides a multifunctional hydrogel dressing for the management of diabetic wounds.
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Im H, Heo E, Song DH, Park J, Park H, Kang K, Chang JB. Fabrication of heterogeneous chemical patterns on stretchable hydrogels using single-photon lithography. SOFT MATTER 2022; 18:4402-4413. [PMID: 35635476 DOI: 10.1039/d2sm00253a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Curved hydrogel surfaces bearing chemical patterns are highly desirable in various applications, including artificial blood vessels, wearable electronics, and soft robotics. However, previous studies on the fabrication of chemical patterns on hydrogels employed two-photon lithography, which is still not widely accessible to most laboratories. This work demonstrates a new patterning technique for fabricating curved hydrogels with chemical patterns on their surfaces without two-photon microscopy. In this work, we show that exposing hydrogels in fluorophore solutions to single photons via confocal microscopy enables the patterning of fluorophores on hydrogels. By applying this technique to highly stretchable hydrogels, we demonstrate three applications: (1) improving pattern resolution by fabricating patterns on stretched hydrogels and then returning the hydrogels to their initial, unstretched length; (2) modifying the local stretchability of hydrogels at a microscale resolution; and (3) fabricating perfusable microchannels with chemical patterns by winding chemically patterned hydrogels around a template, embedding the hydrogels in a second hydrogel, and then removing the template. The patterning method demonstrated in this work may facilitate a better mimicking of the physicochemical properties of organs in tissue engineering and may be used to make hydrogel robots with specific chemical functionalities.
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Affiliation(s)
- Haeseong Im
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Eunseok Heo
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Dae-Hyeon Song
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Jeongwon Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Hyeonbin Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
- Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Kibum Kang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Jae-Byum Chang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
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Liu B, Zhao Y, Zhu T, Gao S, Ye K, Zhou F, Qiu D, Wang X, Tian Y, Qu X. Biphasic Double-Network Hydrogel With Compartmentalized Loading of Bioactive Glass for Osteochondral Defect Repair. Front Bioeng Biotechnol 2020; 8:752. [PMID: 32714919 PMCID: PMC7346869 DOI: 10.3389/fbioe.2020.00752] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 06/12/2020] [Indexed: 12/04/2022] Open
Abstract
Periarticular injury usually causes the defects of superficial cartilage and the underlying subchondral bone. Although some efficacious outcomes have been achieved by the existing therapeutic methods both in clinics and research, like symptomatic treatment, microfracture surgery, and tissue engineering technology, they still present specific disadvantages and complications. To improve this situation, we designed a biphasic (bi-) scaffold aiming to repair the structure of cartilage and subchondral bone synchronously. The scaffold consisted of a superior double-network (DN) hydrogel layer and a lower bioactive glass (BG) reinforced hydrogel layer, and the DN hydrogel included glycol chitosan (GC) and dibenzaldhyde functionalized poly(ethylene oxide) network, and sodium alginate (Alg) and calcium chloride (CaCl2) network. To investigate its effectiveness, we applied this biphasic scaffold to repair osteochondral full-thickness defects in rabbit models. We set up six observation groups in total, including Untreated group, Microfracture group, BG only group, DN gel group, bi-DN gel group, and bi-DN/TGF-β gel group. With a follow-up period of 24 weeks, we evaluated the treatment effects by gross observation, micro-CT scan and histological staining. Besides, we further fulfilled the quantitative analysis of the data from ICRS score, O’Driscoll score and micro-CT parameters. The results revealed that neat GC/Alg DN hydrogel scaffold was only conductive to promoting cartilage regeneration and neat BG scaffold merely showed the excellent ability to reconstruct subchondral bone. While the biphasic scaffold performed better in repairing osteochondral defect synchronously, exhibiting more well-integrated cartilage-like tissue with positive staining of toluidine blue and col II immunohistochemistry, and more dense trabecular bone connecting closely with the surrounding host bone. Therefore, this method possessed the clinical application potential in treating articular injury, osteochondral degeneration, osteochondral necrosis, and sclerosis.
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Affiliation(s)
- Bingchuan Liu
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Yanran Zhao
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Tengjiao Zhu
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Shan Gao
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Kaifeng Ye
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Fang Zhou
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Dong Qiu
- Beijing National Laboratory for Molecular Science, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xing Wang
- Beijing National Laboratory for Molecular Science, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yun Tian
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Xiaozhong Qu
- Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China
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Zhao Y, Cui Z, Liu B, Xiang J, Qiu D, Tian Y, Qu X, Yang Z. An Injectable Strong Hydrogel for Bone Reconstruction. Adv Healthc Mater 2019; 8:e1900709. [PMID: 31353829 DOI: 10.1002/adhm.201900709] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/02/2019] [Indexed: 12/22/2022]
Abstract
For treating bone defects in periarticular fractures, there is a lack of biomaterial with injectable characteristics, tough structure, and osteogenic capacity for providing a whole-structure support and osteogenesis in the defect area. An injectable hydrogel is an ideal implant, however is weak as load-bearing scaffolds. Herein, a new strategy, i.e., an in situ formation of "active" composite double network (DN), is raised for the preparation of an injectable strong hydrogel particularly against compression. As a demonstration, 4-carboxyphenylboronic acid grafted poly(vinyl alcohol) (PVA) is crosslinked using calcium ions to provide a tough frame while bioactive glass (BG) microspheres are associated by poly(ethylene glycol) to obtain an interpenetrated inorganic network for reinforcement. The injected PVA/BG DN hydrogel gains compressive strength, modulus, and fracture energy of 34 MPa, 0.8 MPa, and 40 kJ m-2 , respectively. Then, the properties can be "autostrengthened" to 57 MPa, 2 MPa, and 65 kJ m-2 by mineralization in 14 days. In vivo experiments prove that the injected DN hydrogel is more efficient to treat femoral supracondylar bone defects than the implanted bulk DN gel. The work suggests a facile way to obtain a strong hydrogel with injectability, cytocompatibility, and tailorable functionality.
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Affiliation(s)
- Yanran Zhao
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Opto‐Electronic TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Zhiyong Cui
- Peking University Third Hospital Beijing 100191 China
| | - Bingchuan Liu
- Peking University Third Hospital Beijing 100191 China
| | - Junfeng Xiang
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Opto‐Electronic TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
| | - Dong Qiu
- State Key Laboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
| | - Yun Tian
- Peking University Third Hospital Beijing 100191 China
| | - Xiaozhong Qu
- Center of Materials Science and Optoelectronics EngineeringCollege of Materials Science and Opto‐Electronic TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Zhenzhong Yang
- Department of Chemical EngineeringTsinghua University Beijing 100084 China
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Jia Z, Zhu F, Li X, Liang Q, Zhuo Z, Huang J, Duan L, Xiong J, Wang D. Repair of osteochondral defects using injectable chitosan-based hydrogel encapsulated synovial fluid-derived mesenchymal stem cells in a rabbit model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:541-551. [DOI: 10.1016/j.msec.2019.01.115] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 01/09/2019] [Accepted: 01/25/2019] [Indexed: 12/24/2022]
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Zhao Y, Li M, Liu B, Xiang J, Cui Z, Qu X, Qiu D, Tian Y, Yang Z. Ultra-tough injectable cytocompatible hydrogel for 3D cell culture and cartilage repair. J Mater Chem B 2018; 6:1351-1358. [PMID: 32254420 DOI: 10.1039/c7tb03177g] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this work, we developed a very facile strategy, i.e. dual dynamic crosslinking, to prepare a high performance injectable hydrogel. Poly(vinyl alcohol) (PVA) was crosslinked by 4-carboxyphenylboronic acid (CPBA) through the generation of borate bonding and ionic interaction to bridge the polymer chains in the presence of calcium ions. The dynamic gathering of CPBA could induce a self-reinforcing effect inside the hydrogel matrix, leading to high tensile and compressive moduli of the hydrogel over 1.0 MPa including the highest compressive modulus up to 5.6 MPa. Meanwhile, the mechanical properties of the hydrogel can be broadly and accurately tuned. And owing to the flexible PVA network, the hydrogel is ultra-tough, showing maximum tensile strain, tensile and compressive fracture energies up to 1600%, 600 kJ m-2 and 25 kJ m-2, respectively. Besides, the dynamic bonding overcomes the barriers to forming an injected strong hydrogel, e.g. to obtain a modulus and a fracture energy exceeding 1.0 MPa and 40 kJ m-2, by using a commercial dual-syringe kit under physiological conditions. Such a mild gelation procedure benefits the administration, 3D encapsulation and proliferation of cells of the hydrogels. The application of the PVA hydrogel was demonstrated by effective cartilage repair.
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Affiliation(s)
- Yanran Zhao
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
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8
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Yang C, Han B, Cao C, Yang D, Qu X, Wang X. An injectable double-network hydrogel for the co-culture of vascular endothelial cells and bone marrow mesenchymal stem cells for simultaneously enhancing vascularization and osteogenesis. J Mater Chem B 2018; 6:7811-7821. [DOI: 10.1039/c8tb02244e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Utilization of a GC/Alg DN hydrogel for the co-culture of BM-MSCs with VECs to promote vascularization and osteogenesis simultaneously.
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Affiliation(s)
- Congchong Yang
- Department of Cariology and Endodontology
- National Engineering Laboratory for Digital and Material Technology of Stomatology
- Peking Key Laboratory of Digital Stomatology
- Peking University School and Hospital of Stomatology
- Beijing 100081
| | - Bing Han
- Department of Cariology and Endodontology
- National Engineering Laboratory for Digital and Material Technology of Stomatology
- Peking Key Laboratory of Digital Stomatology
- Peking University School and Hospital of Stomatology
- Beijing 100081
| | - Chunling Cao
- Department of Cariology and Endodontology
- National Engineering Laboratory for Digital and Material Technology of Stomatology
- Peking Key Laboratory of Digital Stomatology
- Peking University School and Hospital of Stomatology
- Beijing 100081
| | - Di Yang
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Xiaozhong Qu
- College of Materials Science and Opto-electronic Technology
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Xiaoyan Wang
- Department of Cariology and Endodontology
- National Engineering Laboratory for Digital and Material Technology of Stomatology
- Peking Key Laboratory of Digital Stomatology
- Peking University School and Hospital of Stomatology
- Beijing 100081
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Yan Y, Li M, Yang D, Wang Q, Liang F, Qu X, Qiu D, Yang Z. Construction of Injectable Double-Network Hydrogels for Cell Delivery. Biomacromolecules 2017; 18:2128-2138. [DOI: 10.1021/acs.biomac.7b00452] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yan Yan
- College
of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengnan Li
- State
Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Di Yang
- College
of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian Wang
- State
Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fuxin Liang
- State
Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaozhong Qu
- College
of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Qiu
- State
Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhenzhong Yang
- State
Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Zhu F, Wang C, Yang S, Wang Q, Liang F, Liu C, Qiu D, Qu X, Hu Z, Yang Z. Injectable tissue adhesive composite hydrogel with fibroblasts for treating skin defects. J Mater Chem B 2017; 5:2416-2424. [PMID: 32264549 DOI: 10.1039/c7tb00384f] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this work, an injectable composite hydrogel was synthesized via a unique way of crosslinking glycol chitosan (GC) with silica nano-particles (SiNP) through non-chemical interactions, and was then applied as a kind of wound dressing. Gelation was achieved through the incorporation of SiNPs with the GC segments in aqueous solution, therefore strictly confining the movement of the solubilized polymer chains. Rheology tests showed that the sol-gel transition and the moduli of the hydrogel were influenced by the composition of the two components, the size of the nano-particles and the conformation of the polymers. Using such a strategy, tissue adhesion properties of GC were well-preserved in the GC/SiNP hydrogel and therefore it gains gluey properties toward biological tissues as demonstrated through the adhesion of two pieces of mouse skin, obtaining a lap-shear stretching force of ca. 90 kPa. This characteristic, together with the injectability, allowed the hydrogel to be administrated directly on the wound site and to fill the wound area. Meanwhile, the hydrogel also works as a carrier of protein and cells. The in situ encapsulation of fibroblasts enabled the promising properties of the GC/SiNP hydrogel to be used for treating full-thickness skin defects in a mouse model, resulting in the favorable growth of hair follicles and microvessels, hence reducing the risk of scar formation.
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Affiliation(s)
- Feiyan Zhu
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
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Wang Y, Yu Z, Mei D, Xue D. Fabrication of Micro-wavy Patterned Surfaces for Enhanced Cell Culturing. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.procir.2017.04.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Qu X, Yang Z. Benzoic-Imine-Based Physiological-pH-Responsive Materials for Biomedical Applications. Chem Asian J 2016; 11:2633-2641. [DOI: 10.1002/asia.201600452] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Xiaozhong Qu
- State Key Laboratory of Polymer Physics and Chemistry; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- College of Materials Science and Opto-Electronic Technology; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Zhenzhong Yang
- State Key Laboratory of Polymer Physics and Chemistry; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
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