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Liu H, Yang Y, Deng L, Shen Z, Huang Q, Shah NG, Chen W, Zhang Y, Wang X, Yu L, Chen Z. Antibacterial and antioxidative hydrogel dressings based on tannic acid-gelatin/oxidized sodium alginate loaded with zinc oxide nanoparticles for promoting wound healing. Int J Biol Macromol 2024; 279:135177. [PMID: 39214222 DOI: 10.1016/j.ijbiomac.2024.135177] [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: 04/15/2024] [Revised: 08/19/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024]
Abstract
Wound infection resulting in delayed wound healing and wound deterioration remains a clinical challenge. Recently, multifunctional hydrogel dressing was a promising strategy which has attracted wide attention in preventing wound infection and promoting wound healing. In this study, a hybrid hydrogel made of gelatin (GL), tannic acid (TA), oxidized sodium alginate (OSA), and zinc oxide nanoparticles (ZnO NPs) was prepared mainly by double network cross-linking approach, named tannic acid-gelatin/oxidized sodium alginate/zinc oxide (TA-GL/OSA/ZnO). The composite hydrogels exhibited improved mechanical properties, which provided by TA modified the structure of GL network, Schiff base reaction between GL and OSA, and the strengthening effect of ZnO NPs. Meanwhile, the composite hydrogel showed high antibacterial activity against Staphylococcus aureus (S. aureus) (97.8 % ± 0.9 %) and Escherichia coli (E. coli) (96.6 % ± 1.2 %), attributed to the synergistic effect of TA and ZnO NPs. Furthermore, benefiting from the good antioxidative properties of TA, the sustain-released Zn2+ with the good capability to kill bacteria, and promoting the regeneration of skin epithelial tissues in BALB/c mice constantly, the multifunctional hydrogel had a significant therapeutic effect on wound healing and broad application prospects.
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Affiliation(s)
- Huaqi Liu
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Yuanyuan Yang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Linglong Deng
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Zhida Shen
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Qiaoyu Huang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Nimra Ghafar Shah
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Wenjing Chen
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Yuhong Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Xianxun Wang
- Department of Orthopedics, Hubei No. 3 People's Hospital of Jianghan University, Wuhan 430033, China.
| | - Li Yu
- Department of Trauma and Microsurgery Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan 430071, China.
| | - Zhaoxia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
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Soleymani H, Ghorbani M, Sedghi M, Allahverdi A, Naderi-Manesh H. Microfluidics single-cell encapsulation reveals that poly-l-lysine-mediated stem cell adhesion to alginate microgels is crucial for cell-cell crosstalk and its self-renewal. Int J Biol Macromol 2024; 274:133418. [PMID: 38936577 DOI: 10.1016/j.ijbiomac.2024.133418] [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: 11/12/2023] [Revised: 04/08/2024] [Accepted: 06/23/2024] [Indexed: 06/29/2024]
Abstract
Microfluidic cell encapsulation has provided a platform for studying the behavior of individual cells and has become a turning point in single-cell analysis during the last decade. The engineered microenvironment, along with protecting the immune response, has led to increasingly presenting the results of practical and pre-clinical studies with the goals of disease treatment, tissue engineering, intelligent control of stem cell differentiation, and regenerative medicine. However, the significance of cell-substrate interaction versus cell-cell communications in the microgel is still unclear. In this study, monodisperse alginate microgels were generated using a flow-focusing microfluidic device to determine how the cell microenvironment can control human bone marrow-derived mesenchymal stem cells (hBMSCs) viability, proliferation, and biomechanical features in single-cell droplets versus multi-cell droplets. Collected results show insufficient cell proliferation (234 % and 329 %) in both single- and multi-cell alginate microgels. Alginate hydrogels supplemented with poly-l-lysine (PLL) showed a better proliferation rate (514 % and 780 %) in a comparison of free alginate hydrogels. Cell stiffness data illustrate that hBMSCs cultured in alginate hydrogels have higher membrane flexibility and migration potency (Young's modulus equal to 1.06 kPa), whereas PLL introduces more binding sites for cell attachment and causes lower flexibility and migration potency (Young's modulus equal to 1.83 kPa). Considering that cell adhesion is the most important parameter in tissue engineering, in which cells do not run away from a 3D substrate, PLL enhances cell stiffness and guarantees cell attachments. In conclusion, cell attachment to PLL-mediated alginate hydrogels is crucial for cell viability and proliferation. It suggests that cell-cell signaling is good enough for stem cell viability, but cell-PLL attachment alongside cell-cell signaling is crucial for stem cell proliferation and self-renewal.
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Affiliation(s)
- Hossein Soleymani
- Biophysics Department, Faculty of Biological Sciences, Tarbiat Modares University, 14115-154 Tehran, Iran.
| | - Mohammad Ghorbani
- Faculty of Natural Sciences, University of Tabriz, 51666-16471 Tabriz, Iran
| | - Mosslim Sedghi
- Biophysics Department, Faculty of Biological Sciences, Tarbiat Modares University, 14115-154 Tehran, Iran
| | - Abdollah Allahverdi
- Biophysics Department, Faculty of Biological Sciences, Tarbiat Modares University, 14115-154 Tehran, Iran.
| | - Hossein Naderi-Manesh
- Biophysics Department, Faculty of Biological Sciences, Tarbiat Modares University, 14115-154 Tehran, Iran; Department of Nanobiotechnology, Faculty of Biological Science, Tarbiat Modares University, 14115-154 Tehran, Iran.
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Wang Y, Shi Y, Liu J, Yang W, Tang H, Li H. Developing hyaluronic acid-proline-ferric ion cross-linked film for efficient wound healing application. Int J Pharm 2023:123140. [PMID: 37354928 DOI: 10.1016/j.ijpharm.2023.123140] [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: 02/03/2023] [Revised: 05/27/2023] [Accepted: 06/10/2023] [Indexed: 06/26/2023]
Abstract
A novel cross-linked film dressing that can accelerate wound healing and guard against bacterial infection was presented in this work. The hyaluronic acid-proline-ferric ion (HA-Pro-Fe3+) film was successfully prepared by physically cross-linking method, which the carboxyl groups of the HA and Pro molecules should be in coordination with Fe3+. The HA-Pro-Fe3+ cross-linked film showed three-dimensional porous structure, appropriate water vapor permeability and swelling property, favorable cytocompatibility and hemocompatibility, antibacterial and antioxidative capability. The results of rat skin wound healing confirmed that HA-Pro-Fe3+ film could accelerate epithelial regeneration and collagen deposition, promote angiogenesis and significantly improve skin wound healing. Elisa analysis indicated that HA-Pro-Fe3+ material could down-regulate the expression of IL-6 and TNF-α, and up-regulate the level of TGF-β1 and VEGF. Given its biocompatibility, antibacterial ability, promotion of cell proliferation and angiogenesis, the wide application of HA-Pro-Fe3+ cross-linked film in wound repair would be anticipated.
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Affiliation(s)
- Yihua Wang
- College of Pharmaceutical Science & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, China
| | - Yanxia Shi
- College of Pharmaceutical Science & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, China
| | - Jie Liu
- College of Pharmaceutical Science & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, China
| | - Wendhi Yang
- College of Pharmaceutical Science & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, China.
| | - Hongbo Tang
- Department of Pharmacy, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, 100026 PR China.
| | - Haiying Li
- College of Pharmaceutical Science & Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, China.
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Babić Radić MM, Filipović VV, Vuković JS, Vukomanović M, Ilic-Tomic T, Nikodinovic-Runic J, Tomić SL. 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Scaffolds Reinforced with Nano TiO2 as a Promising Curcumin Release Platform. Polymers (Basel) 2023; 15:polym15071643. [PMID: 37050256 PMCID: PMC10097359 DOI: 10.3390/polym15071643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/16/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023] Open
Abstract
The idea of this study was to create a new scaffolding system based on 2-hydroxyethyl methacrylate, gelatin, and alginate that contains titanium(IV) oxide nanoparticles as a platform for the controlled release of the bioactive agent curcumin. The innovative strategy to develop hybrid scaffolds was the modified porogenation method. The effect of the scaffold composition on the chemical, morphology, porosity, mechanical, hydrophilicity, swelling, degradation, biocompatibility, loading, and release features of hybrid scaffolds was evaluated. A porous structure with interconnected pores in the range of 52.33–65.76%, favorable swelling capacity, fully hydrophilic surfaces, degradability to 45% for 6 months, curcumin loading efficiency above 96%, and favorable controlled release profiles were obtained. By applying four kinetic models of release, valuable parameters were obtained for the curcumin/PHEMA/gelatin/alginate/TiO2 release platform. Cytotoxicity test results depend on the composition of the scaffolds and showed satisfactory cell growth with visible cell accumulation on the hybrid surfaces. The constructed hybrid scaffolds have suitable high-performance properties, suggesting potential for further in vivo and clinical studies.
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Material Properties and Cell Compatibility of Photo-Crosslinked Sericin Urethane Methacryloyl Hydrogel. Gels 2022; 8:gels8090543. [PMID: 36135255 PMCID: PMC9498915 DOI: 10.3390/gels8090543] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
There is a need to develop novel cytocompatible hydrogels for cell encapsulation and delivery in regenerative medicine. The objective of this work was to synthesize isocyanato ethyl methacryloyl-functionalized sericin and determine its material properties as a natural hydrogel for the encapsulation and delivery of human mesenchymal stem cells (MSCs) in regenerative medicine. Sericin extracted from silk cocoons was reacted with 2-isocyanatoethyl methacrylate (IEM) or methacrylic anhydride (MA) to produce sericin urethane methacryloyl (SerAte-UM) or sericin methacryloyl (SerAte-M, control) biopolymers, respectively. The hydrogels produced by photo-crosslinking of the biopolymers in an aqueous solution were characterized with respect to gelation kinetics, microstructure, compressive modulus, water content, degradation, permeability, and viability of encapsulated cells. The secondary structure of citric acid-extracted sericin was not affected by functionalization with IEM or MA. SerAte-UM hydrogel was slightly more hydrophilic than SerAte-M. The gelation time of SerAte-UM hydrogel decreased with an increasing degree of modification. The photo-polymerized SerAte-UM hydrogel had a highly porous, fibrous, honeycomb microstructure with an average pore size in the 40−50 µm range. The compressive modulus, swelling ratio, and permeability of SerAte-UM hydrogel depended on the degree of modification of sericin, and the mass loss after 21 days of incubation in aqueous solution was <25%. Both SerAte-UM and SerAte-M hydrogels supported viability and growth in encapsulated MSCs. The SerAte-UM hydrogel, with its higher hydrophilicity compared to SerAte-M, is promising as a matrix for encapsulation and delivery of stem cells in tissue engineering.
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Sun J, Yin Z, Wang X, Su J. Exosome-Laden Hydrogels: A Novel Cell-free Strategy for In-situ Bone Tissue Regeneration. Front Bioeng Biotechnol 2022; 10:866208. [PMID: 35433664 PMCID: PMC9011111 DOI: 10.3389/fbioe.2022.866208] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/07/2022] [Indexed: 12/15/2022] Open
Abstract
In-situ bone tissue regeneration, which harnesses cell external microenvironment and their regenerative potential to induce cell functions and bone reconstruction through some special properties of biomaterials, has been deeply developed. In which, hydrogel was widely applied due to its 3D network structure with high water absorption and mimicking native extracellular matrix (ECM). Additionally, exosomes can participate in a variety of physiological processes such as cell differentiation, angiogenesis and tissue repair. Therefore, a novel cell-free tissue engineering (TE) using exosome-laden hydrogels has been explored and developed for bone regeneration in recent years. However, related reviews in this field are limited. Therefore, we elaborated on the shortcomings of traditional bone tissue engineering, the challenges of exosome delivery and emphasized the advantages of exosome-laden hydrogels for in-situ bone tissue regeneration. The encapsulation strategies of hydrogel and exosomes are listed, and the research progress and prospects of bioactive hydrogel composite system for continuous delivery of exosomes for in-situ bone repair are also discussed in this review.
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Affiliation(s)
- Jinru Sun
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Zhifeng Yin
- Department of Orthopedics, Shanghai Zhongye Hospital, Shanghai, China
| | - Xiuhui Wang
- Institute of Translational Medicine, Shanghai University, Shanghai, China
- *Correspondence: Xiuhui Wang, ; Jiacan Su,
| | - Jiacan Su
- Institute of Translational Medicine, Shanghai University, Shanghai, China
- Department of Orthopaedics Trauma, Changhai Hospital, Second Military Medical University, Shanghai, China
- *Correspondence: Xiuhui Wang, ; Jiacan Su,
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Radulescu DM, Neacsu IA, Grumezescu AM, Andronescu E. New Insights of Scaffolds Based on Hydrogels in Tissue Engineering. Polymers (Basel) 2022; 14:799. [PMID: 35215710 PMCID: PMC8875010 DOI: 10.3390/polym14040799] [Citation(s) in RCA: 60] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 02/04/2023] Open
Abstract
In recent years, biomaterials development and characterization for new applications in regenerative medicine or controlled release represent one of the biggest challenges. Tissue engineering is one of the most intensively studied domain where hydrogels are considered optimum applications in the biomedical field. The delicate nature of hydrogels and their low mechanical strength limit their exploitation in tissue engineering. Hence, developing new, stronger, and more stable hydrogels with increased biocompatibility, is essential. However, both natural and synthetic polymers possess many limitations. Hydrogels based on natural polymers offer particularly high biocompatibility and biodegradability, low immunogenicity, excellent cytocompatibility, variable, and controllable solubility. At the same time, they have poor mechanical properties, high production costs, and low reproducibility. Synthetic polymers come to their aid through superior mechanical strength, high reproducibility, reduced costs, and the ability to regulate their composition to improve processes such as hydrolysis or biodegradation over variable periods. The development of hydrogels based on mixtures of synthetic and natural polymers can lead to the optimization of their properties to obtain ideal scaffolds. Also, incorporating different nanoparticles can improve the hydrogel's stability and obtain several biological effects. In this regard, essential oils and drug molecules facilitate the desired biological effect or even produce a synergistic effect. This study's main purpose is to establish the main properties needed to develop sustainable polymeric scaffolds. These scaffolds can be applied in tissue engineering to improve the tissue regeneration process without producing other side effects to the environment.
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Affiliation(s)
- Denisa-Maria Radulescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 011061 Bucharest, Romania; (D.-M.R.); (A.-M.G.); (E.A.)
| | - Ionela Andreea Neacsu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 011061 Bucharest, Romania; (D.-M.R.); (A.-M.G.); (E.A.)
- Academy of Romanian Scientists, 54 Independentei, 050094 Bucharest, Romania
- National Research Center for Micro and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Alexandru-Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 011061 Bucharest, Romania; (D.-M.R.); (A.-M.G.); (E.A.)
- Academy of Romanian Scientists, 54 Independentei, 050094 Bucharest, Romania
- Research Institute of the University of Bucharest (ICUB), University of Bucharest, 050657 Bucharest, Romania
| | - Ecaterina Andronescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 011061 Bucharest, Romania; (D.-M.R.); (A.-M.G.); (E.A.)
- Academy of Romanian Scientists, 54 Independentei, 050094 Bucharest, Romania
- National Research Center for Micro and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
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Wang S, Li J, Ma Z, Sun L, Hou L, Huang Y, Zhang Y, Guo B, Yang F. A Sequential Therapeutic Hydrogel With Injectability and Antibacterial Activity for Deep Burn Wounds' Cleaning and Healing. Front Bioeng Biotechnol 2021; 9:794769. [PMID: 34926433 PMCID: PMC8675388 DOI: 10.3389/fbioe.2021.794769] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/11/2021] [Indexed: 11/13/2022] Open
Abstract
As a severe clinical challenge, escharotomy and infection are always the core concerns of deep burn injuries. However, a usual dressing without multifunctionality leads to intractable treatment on deep burn wounds. Herein, we fabricated a sequential therapeutic hydrogel to solve this problem. Cross-linked by modified polyvinyl alcohol (PVA-SH/ε-PL) and benzaldehyde-terminated F127 triblock copolymers (PF127-CHO), the hydrogel demonstrated excellent mechanical properties, injectability, tissue adhesiveness, antibacterial activity, biocompatibility, and satisfactory wound cleaning through both in vitro and in vivo assays. Additionally, based on the conception of “sequential therapy,” we proposed for the first time to load bromelain and EGF into the same hydrogel in stages for wound cleaning and healing. This work provides a strategy to fabricate a promising wound dressing for the treatment of deep burn wounds with injectability and improved patients’ compliance as it simplified the process of treatment due to its “three in one” characteristic (antibacterial activity, wound cleaning, and healing effects); therefore, it has great potential in wound dressing development and clinical application.
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Affiliation(s)
- Sizhen Wang
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Jie Li
- Department of Dermatology, 967 Hospital of the Joint Logistics Support Force of PLA, Dalian, China
| | - Zhiqiang Ma
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Linhong Sun
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Lei Hou
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Ying Huang
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Yunchang Zhang
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Beibei Guo
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Feng Yang
- Department of Inorganic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
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Enhanced topical corticosteroids delivery to the eye: A trade-off in strategy choice. J Control Release 2021; 339:91-113. [PMID: 34560157 DOI: 10.1016/j.jconrel.2021.09.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/16/2021] [Accepted: 09/18/2021] [Indexed: 12/19/2022]
Abstract
Topical corticosteroids are the primary treatment of ocular inflammation caused by surgery, injury, or other conditions. Drug pre-corneal residence time, drug water solubility, and drug corneal permeability coefficient are the major factors that determine the ocular drug bioavailability after topical administration. Although growing research successfully enhanced local delivery of corticosteroids utilizing various strategies, rational and dynamic approaches to strategy selection are still lacking. Within this review, an overview of the various strategies as well as their performance in retention, solubility, and permeability coefficient of corticosteroids are provided. On this basis, the tradeoff of strategy selection is discussed, which may shed light on the rational choice and application of ophthalmic delivery enhancement strategies.
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Onder OC, Utroša P, Caserman S, Podobnik M, Žagar E, Pahovnik D. Preparation of Synthetic Polypeptide–PolyHIPE Hydrogels with Stimuli-Responsive Behavior. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01490] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ozgun Can Onder
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Petra Utroša
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Simon Caserman
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Marjetka Podobnik
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Ema Žagar
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - David Pahovnik
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
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Yao Y, Zhang A, Yuan C, Chen X, Liu Y. Recent trends on burn wound care: hydrogel dressings and scaffolds. Biomater Sci 2021; 9:4523-4540. [PMID: 34047308 DOI: 10.1039/d1bm00411e] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Acute and chronic wounds can cause severe physical trauma to patients and also result in an immense socio-economic burden. Thus, wound management has attracted increasing attention in recent years. However, burn wound management is still a major challenge in wound management. Autografts are often considered the gold-standard for burn care, but their application is limited by many factors. Hence, ideal burn dressings and skin substitute dressings are desirable. With the development of biomaterials and progress of tissue engineering technology, some innovative dressings and tissue engineering scaffolds, such as nanofibers, films, foams and hydrogels, have been widely used in the field of biomedicine, especially in wound management. Among them, hydrogels have attracted tremendous attention with their unique advantages. In this review, we discuss the challenges in burn wound management, several crucial design considerations with respect to hydrogels for burn wound healing, and available polymers for hydrogels in burn wound care. In addition, the potential application and plausible prospect of hydrogels are also highlighted.
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Affiliation(s)
- Yingxia Yao
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Andi Zhang
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Congshan Yuan
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Xiguang Chen
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China. and Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266000, P.R. China
| | - Ya Liu
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
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Qu S, Yi J, Chen Z, Zhou J. A Potential Filling Material for Wound Healing and Shaping: Acellular Dermal Matrix Combined with Autologous Dermis. Aesthetic Plast Surg 2021; 45:740-748. [PMID: 31624892 DOI: 10.1007/s00266-019-01516-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 10/02/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND The currently used subcutaneous fillers are not effective enough. The use of autologous tissues or cells will reduce immune rejection and increase the stability of the fillers, while increasing the absorbability of filling materials. To establish a durable and safe filling material, we herein combined acellular dermal matrix (ADM) with autologous dermal cells and tested the performance of this matrix in wound healing and shaping. METHODS To prepare the ADM, stratified skin was obtained from the back of two New Zealand rabbits and decellularized to obtain ADM. The ADM was ultrasonically mixed with as-prepared autologous dermis in vitro. The mixture was injected as a subcutaneous filler into the back area of 20 New Zealand rabbits. In this procedure, different concentration ratios of the mixture were injected, and the volume change of the filler was measured and categorized into five groups. At 4 months and 8 months after filling, samples were obtained for quantitative evaluation of the thickness and vessel density, as well as qualitative evaluation of colonization. RESULTS Examination of the ADM conformed that the matrix had no cells. ADM and the prepared autologous dermis were evenly mixed, and the filler was gradually absorbed. The comprehensive evaluation of ADM and autologous dermis mixture showed that group C had the best filling effect with the least infiltration of inflammatory cells and the highest vascular density compared to A, B, D and E groups in the study. CONCLUSION When combined at the ratio of 50%:50%, the autologous dermis combined and acellular dermal matrix showed better performance compared to the other four different ratios in this study. This implies that this combination is potentially safer, effective and stable as a filling material compared to ADM or dermal matrix alone. NO LEVEL ASSIGNED This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Abstract
Hydrogels are polymeric networks highly swollen with water. Because of their versatility and properties mimicking biological tissues, they are very interesting for biomedical applications. In this aim, the control of porosity is of crucial importance since it governs the transport properties and influences the fate of cells cultured onto or into the hydrogels. Among the techniques allowing for the elaboration of hydrogels, photopolymerization or photo-cross-linking are probably the most powerful and versatile synthetic routes. This Review aims at giving an overview of the literature dealing with photopolymerized hydrogels for which the generation or characterization of porosity is studied. First, the materials (polymers and photoinitiating systems) used for synthesizing hydrogels are presented. The different ways for generating porosity in the photopolymerized hydrogels are explained, and the characterization techniques allowing adequate study of the porosity are presented. Finally, some applications in the field of controlled release and tissue engineering are reviewed.
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Affiliation(s)
- Erwan Nicol
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS Le Mans Université, Avenue Olivier Messiaen, 72085 Cedex 9 Le Mans, France
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14
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Hydrogel Properties and Their Impact on Regenerative Medicine and Tissue Engineering. Molecules 2020; 25:molecules25245795. [PMID: 33302592 PMCID: PMC7764781 DOI: 10.3390/molecules25245795] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/21/2022] Open
Abstract
Hydrogels (HGs), as three-dimensional structures, are widely used in modern medicine, including regenerative medicine. The use of HGs in wound treatment and tissue engineering is a rapidly developing sector of medicine. The unique properties of HGs allow researchers to easily modify them to maximize their potential. Herein, we describe the physicochemical properties of HGs, which determine their subsequent applications in regenerative medicine and tissue engineering. Examples of chemical modifications of HGs and their applications are described based on the latest scientific reports.
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15
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Li F, Levinson C, Truong VX, Laurent-Applegate LA, Maniura-Weber K, Thissen H, Forsythe JS, Zenobi-Wong M, Frith JE. Microencapsulation improves chondrogenesis in vitro and cartilaginous matrix stability in vivo compared to bulk encapsulation. Biomater Sci 2020; 8:1711-1725. [PMID: 31994552 DOI: 10.1039/c9bm01524h] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The encapsulation of cells into microgels is attractive for applications in tissue regeneration. While cells are protected against shear stress during injection, the assembly of microgels after injection into a tissue defect also forms a macroporous scaffold that allows effective nutrient transport throughout the construct. However, in most of current strategies that form microgel-based macroporous scaffold or higher-order structures, cells are seeded during or post the assembly process and not microencapsulated in situ. The objective of this study is to investigate the chondrogenic phenotype of microencapsulated fetal chondrocytes in a biocompatible, assembled microgel system vs. bulk gels and to test the stability of the constructs in vivo. Here, we demonstrate that cell microencapsulation leads to increased expression of cartilage-specific genes in a TGF-β1-dependent manner. This correlates, as shown by histological staining, with the ability of microencapsulated cells to deposit cartilaginous matrix after migrating to the surface of the microgels, while keeping a macroscopic granular morphology. Implantation of precultured scaffolds in a subcutaneous mouse model results in vessel infiltration in bulk gels but not in assembled microgels, suggesting a higher stability of the matrix produced by the cells in the assembled microgel constructs. The cells are able to remodel the microgels as demonstrated by the gradual disappearance of the granular structure in vivo. The biocompatible microencapsulation and microgel assembly system presented in this article therefore hold great promise as an injectable system for cartilage repair.
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Affiliation(s)
- Fanyi Li
- Department of Materials Science and Engineering, Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia. and CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia
| | - Clara Levinson
- Tissue Engineering + Biofabrication, Department of Health Sciences and Technology, ETH Zürich, Switzerland.
| | - Vinh X Truong
- Department of Materials Science and Engineering, Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia.
| | | | - Katharina Maniura-Weber
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, St. Gallen, Switzerland
| | - Helmut Thissen
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia
| | - John S Forsythe
- Department of Materials Science and Engineering, Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia.
| | - Marcy Zenobi-Wong
- Tissue Engineering + Biofabrication, Department of Health Sciences and Technology, ETH Zürich, Switzerland.
| | - Jessica E Frith
- Department of Materials Science and Engineering, Monash Institute of Medical Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia.
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16
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Santisteban-Espejo A, Campos F, Chato-Astrain J, Durand-Herrera D, García-García O, Campos A, Martin-Piedra MA, Moral-Munoz JA. Identification of Cognitive and Social Framework of Tissue Engineering by Science Mapping Analysis. Tissue Eng Part C Methods 2019; 25:37-48. [PMID: 30526420 DOI: 10.1089/ten.tec.2018.0213] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
IMPACT STATEMENT This study evaluates the cognitive structure and social behavior of tissue engineering (TE) based on a science mapping analysis. Understanding the terms and topics that play a key role in the development of TE can help administrative authorities to better plan funding. Moreover, a better knowledge of collaborative networks in TE and the identification of potential new opportunities for collaboration may enhance synergies in scientific activities to implement future approaches to therapy.
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Affiliation(s)
| | - Fernando Campos
- 2 Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain.,3 Research Institute ibs.GRANADA, Granada, Spain
| | - Jesus Chato-Astrain
- 2 Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain
| | - Daniel Durand-Herrera
- 2 Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain
| | - Oscar García-García
- 2 Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain
| | - Antonio Campos
- 2 Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain.,3 Research Institute ibs.GRANADA, Granada, Spain
| | - Miguel Angel Martin-Piedra
- 2 Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain.,3 Research Institute ibs.GRANADA, Granada, Spain
| | - Jose Antonio Moral-Munoz
- 4 Department of Nursing and Physiotherapy, University of Cadiz, Cadiz, Spain.,5 Institute of Research and Innovation in Biomedical Sciences of the Province of Cadiz (INiBICA), University of Cadiz, Cadiz, Spain
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17
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Piantanida E, Alonci G, Bertucci A, De Cola L. Design of Nanocomposite Injectable Hydrogels for Minimally Invasive Surgery. Acc Chem Res 2019; 52:2101-2112. [PMID: 31291090 DOI: 10.1021/acs.accounts.9b00114] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Biocompatible hydrogels are materials that hold great promise in medicine and biology since the porous structure, the ability to entrap a large amount of water, and the tunability of their mechanical and tissue adhesive properties make them suitable for several applications, including wound healing, drug and cell delivery, cancer treatment, bioelectronics, and tissue regeneration. Among the possible developed systems, injectable hydrogels, owing to their properties, are optimal candidates for in vivo minimally invasive procedures. To be injectable, a hydrogel must be liquid before and during the injection, but it must quickly jellify after injection to form a soft, self-standing, solid material. The possibility to work with a liquid precursor encoding the functions that will be available after gelation allows the development of biocompatible materials that can be employed in surgery and, in particular, in noninvasive procedures. The underlying idea is to reach the target tissue by using just a needle, or by exploiting the natural body orifices, reducing surgery procedure time, induced pain, and risk of infections. Hydrogels with different properties can be obtained by changing the type of cross-linking, the cross-linking density or the molecular weight of the polymer, or by introducing pending functional groups. The introduction of a nanofiller in the hydrogel network allows for expanding the suite of the structural and functional properties and for better mimicking native tissues. In this Account, we discuss how to provide a hydrogel network with designed properties by playing with both the polymeric chains and the fillers. We present selected examples from the literature that show how to introduce stiffness, stretchability, adhesiveness, self-healing, anisotropy, antimicrobial activity, biodegradability, and conductivity in injectable hydrogels. We further describe how the chemical composition, the mechanical properties, and the microarchitecture of the hydrogel influence cell adhesion, proliferation, and differentiation. Examples of injectable hydrogels for innovative minimally invasive procedures are then discussed in detail; in particular, we showcase the use of hydrogels for tumor resection and as vascular chemoembolization agents. We further discuss how one can improve the rheological properties of injectable hydrogels to exploit them in osteochondral tissue engineering. The effect of the introduction of a conductive filler is then presented in relation to the development of electroactive scaffolds for cardiac-tissue engineering and neural and nerve repair. We believe that the rational design of biocompatible, injectable hybrid hydrogels with tunable properties will likely play a crucial role in reducing the invasiveness and improving the outcome of several clinical and surgical setups.
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Affiliation(s)
- Etienne Piantanida
- Institut de Science et d’Ingénierie Supramoléculaires, CNRS, UMR 7006, Université de Strasbourg, 8 rue Gaspard Monge, 67000 Strasbourg, France
| | - Giuseppe Alonci
- Institut de Science et d’Ingénierie Supramoléculaires, CNRS, UMR 7006, Université de Strasbourg, 8 rue Gaspard Monge, 67000 Strasbourg, France
| | - Alessandro Bertucci
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, Rome 00133, Italy
| | - Luisa De Cola
- Institut de Science et d’Ingénierie Supramoléculaires, CNRS, UMR 7006, Université de Strasbourg, 8 rue Gaspard Monge, 67000 Strasbourg, France
- Institute of Nanotecnology and Karlsruhe Nano and Micro Facility, Karlsruhe Institute of Technology (KIT), Herman-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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18
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Wang Z, An G, Zhu Y, Liu X, Chen Y, Wu H, Wang Y, Shi X, Mao C. 3D-printable self-healing and mechanically reinforced hydrogels with host-guest non-covalent interactions integrated into covalently linked networks. MATERIALS HORIZONS 2019; 6:733-742. [PMID: 31572613 PMCID: PMC6768557 DOI: 10.1039/c8mh01208c] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Natural polymer hydrogels are one of the best biomaterials for soft tissue repair because of their excellent biocompatibility, biodegradability and low immune rejection. However, they lack mechanical strength matching that of natural tissue and desired functionality (e.g. self-healing and 3D-printability). To solve this problem, we developed a host-guest supramolecule (HGSM) with three arms covalently crosslinked with a natural polymer to construct a novel hydrogel with non-covalent bonds integrated in a covalently crosslinked network. The unique structure enabled the hydrogel to bear improved mechanical properties and show both self-healing and 3D printing capabilities. The three-armed HGSM was first prepared via the efficient non-covalent host-guest inclusion interactions between isocyanatoethyl acrylate-modified β-cyclodextrin (β-CD-AOI2) and acryloylated tetra-ethylene glycol-modified adamantane (A-TEG-Ad). Subsequently, a host-guest supramolecular hydrogel (HGGelMA) was obtained through copolymerization between the arms of HGSM and gelatin methacryloyl (GelMA) to form a covalently crosslinked network. The HGGelMA was robust, fatigue resistant, reproducible and rapidly self-healing. In HGGelMA, the covalent crosslinking maintained its overall shape whereas the weak reversible non-covalent host-guest interactions reinforced its mechanical properties and enabled it to rapidly self-heal upon fracturing. The reversible non-covalent interactions could be re-established upon breaking, so as to heal the hydrogel and dissipate energy to prevent catastrophic fracture propagation. Furthermore, the precursors of the HGGelMA were sufficiently viscous and could be rapidly photocrosslinked to produce a robust scaffold with an exquisite internal structure through 3D printing. The 3D-printed HGGelMA hydrogel scaffold was biocompatible, promoted cell adhesion and proliferation, and supported tissue in-growth. Our strategy of integrating non-covalently linked HGSM in a covalently linked hydrogel network represents a new approach to the development of natural polymers into biocompatible hydrogels with improved strength as well as desired self-healing and 3D-printability.
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Affiliation(s)
- Zhifang Wang
- National Engineering Research Centre for Tissue Restoration and Reconstruction and School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Geng An
- Department of Reproductive Medicine Center, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P. R. China
| | - Ye Zhu
- Department of Chemistry & Biochemistry, Stephenson Life Sciences Research Center, Institute for Biomedical Engineering, Science and Technology, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019-5300, United States
| | - Xuemin Liu
- National Engineering Research Centre for Tissue Restoration and Reconstruction and School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Yunhua Chen
- National Engineering Research Centre for Tissue Restoration and Reconstruction and School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Hongkai Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China
| | - Yingjun Wang
- National Engineering Research Centre for Tissue Restoration and Reconstruction and School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Xuetao Shi
- National Engineering Research Centre for Tissue Restoration and Reconstruction and School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Chuanbin Mao
- Department of Chemistry & Biochemistry, Stephenson Life Sciences Research Center, Institute for Biomedical Engineering, Science and Technology, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019-5300, United States
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19
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Huang J, Ren Y, Wu X, Li Z, Ren J. Gut bioengineering promotes gut repair and pharmaceutical research: a review. J Tissue Eng 2019; 10:2041731419839846. [PMID: 31037215 PMCID: PMC6475831 DOI: 10.1177/2041731419839846] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 03/05/2019] [Indexed: 12/11/2022] Open
Abstract
The gastrointestinal (GI) tract has a diverse set of physiological functions, including peristalsis, immune defense, and nutrient absorptions. These functions are mediated by various intestinal cells such as epithelial cells, interstitial cells, smooth muscle cells, and neurocytes. The loss or dysfunction of specific cells directly results in GI disease, while supplementation of normal cells promotes gut healing. Gut bioengineering has been developing for this purpose to reconstruct the damaged tissues. Moreover, GI tract provides an accessible route for drug delivery, but the collateral damages induced by side effects cannot be ignored. Bioengineered intestinal tissues provide three-dimensional platforms that mimic the in vivo environment to study drug functions. Given the importance of gut bioengineering in current research, in this review, we summarize the advances in the technologies of gut bioengineering and their applications. We were able to identify several ground-breaking discoveries in our review, while more work is needed to promote the clinical translation of gut bioengineering.
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Affiliation(s)
- Jinjian Huang
- School of Medicine, Southeast University, Nanjing, China.,Laboratory for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, Nanjing, China
| | - Yanhan Ren
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Xiuwen Wu
- Laboratory for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, Nanjing, China
| | - Zongan Li
- School of NARI Electrical and Automation Engineering, Nanjing Normal University, Nanjing, China
| | - Jianan Ren
- School of Medicine, Southeast University, Nanjing, China.,Laboratory for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, Nanjing, China
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20
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Homayun B, Lin X, Choi HJ. Challenges and Recent Progress in Oral Drug Delivery Systems for Biopharmaceuticals. Pharmaceutics 2019; 11:E129. [PMID: 30893852 PMCID: PMC6471246 DOI: 10.3390/pharmaceutics11030129] [Citation(s) in RCA: 391] [Impact Index Per Article: 78.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/09/2019] [Accepted: 03/14/2019] [Indexed: 01/08/2023] Open
Abstract
Routes of drug administration and the corresponding physicochemical characteristics of a given route play significant roles in therapeutic efficacy and short term/long term biological effects. Each delivery method has favorable aspects and limitations, each requiring a specific delivery vehicles design. Among various routes, oral delivery has been recognized as the most attractive method, mainly due to its potential for solid formulations with long shelf life, sustained delivery, ease of administration and intensified immune response. At the same time, a few challenges exist in oral delivery, which have been the main research focus in the field in the past few years. The present work concisely reviews different administration routes as well as the advantages and disadvantages of each method, highlighting why oral delivery is currently the most promising approach. Subsequently, the present work discusses the main obstacles for oral systems and explains the most recent solutions proposed to deal with each issue.
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Affiliation(s)
- Bahman Homayun
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
| | - Xueting Lin
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
| | - Hyo-Jick Choi
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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21
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Abstract
Adipose-derived stem cells (ADSC) have come to be viewed as a ubiquitous solution for aesthetic and reconstructive problems involving loss of tissue volume and age or radiation-induced loss of tissue pliability and vascularity. As the theoretical potential of "stem cell therapy" has captured the public imagination, so the commercial potential of novel therapies is being exploited beyond scientifically sound, hypothesis-driven paradigms and in the absence of evidence establishing clinical efficacy and safety. Moreover, with variations in methods of isolation, manipulation, and reintroduction described, it is unclear how the practitioner with an interest in ADSC can harness the clinical potential in reproducible and scientifically measurable ways. This Continuing Medical Education (CME) article presents a summary of our understanding of what ADSC are, their utility within the field of aesthetic surgery, and the current and future directions for adipose stem cell research.
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Affiliation(s)
- Graeme Ewan Glass
- Attending Plastic and Craniofacial Surgeon, Department of Surgery, Sidra Medicine, Doha, Qatar; and Weill Cornell Medical College, Ar-Rayyan, Qatar
| | - Patrizia Ferretti
- Professor of Regenerative Biology, UCL Great Ormond Street Institute of Child Health, University College London, London, UK
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22
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Hua J, Ng PF, Fei B. High-strength hydrogels: Microstructure design, characterization and applications. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24725] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jiachuan Hua
- Institute of Textiles and Clothing; Hong Kong Polytechnic University; Kowloon Hong Kong
| | - Pui Fai Ng
- Institute of Textiles and Clothing; Hong Kong Polytechnic University; Kowloon Hong Kong
| | - Bin Fei
- Institute of Textiles and Clothing; Hong Kong Polytechnic University; Kowloon Hong Kong
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23
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Khang MK, Zhou J, Huang Y, Hakamivala A, Tang L. Preparation of a novel injectable in situ-gelling nanoparticle with applications in controlled protein release and cancer cell entrapment. RSC Adv 2018; 8:34625-34633. [PMID: 35548629 PMCID: PMC9087364 DOI: 10.1039/c8ra06589f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 12/11/2018] [Accepted: 10/02/2018] [Indexed: 11/21/2022] Open
Abstract
Temperature sensitive injectable hydrogels have been used as drug/protein carriers for a variety of pharmaceutical applications. Oligo(ethylene glycol) methacrylate (OEGMA) monomers with varying ethylene oxide chain lengths have been used for the synthesis of in situ forming hydrogel. In this study, a new series of thermally induced gelling hydrogel nanoparticles (PMOA hydrogel nanoparticles) was developed by copolymerization with di(ethylene glycol) methyl ether methacrylate (MEO2MA), poly(ethylene glycol) methyl ether methacrylate (300 g mol-1, OEGMA300), and acrylic acid (AAc). The effects of acrylic acid content on the physical, chemical, and biological properties of the nanoparticle-based hydrogels were investigated. Due to its high electrostatic properties, addition of AAc increases LCST as well as gelation temperature. Further, using Cy5-labelled bovine serum albumin and erythropoietin (Epo) as model drugs, studies have shown that the thermogelling hydrogels have the ability to tune the release rate of these proteins in vitro. Finally, the ability of Epo releasing hydrogels to recruit prostate cancer cells was assessed in vivo. Overall, our results support that this new series of thermally induced gelling systems can be used as protein control releasing vehicles and cancer cell traps.
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Affiliation(s)
- Min Kyung Khang
- Chemistry and Biochemistry Department, University of Texas at Arlington Arlington Texas USA
- Bioengineering Department, University of Texas at Arlington P. O. Box 19138 Arlington Texas 76019-0138 USA
| | - Jun Zhou
- Bioengineering Department, University of Texas at Arlington P. O. Box 19138 Arlington Texas 76019-0138 USA
| | - Yihui Huang
- Bioengineering Department, University of Texas at Arlington P. O. Box 19138 Arlington Texas 76019-0138 USA
| | - Amirhossein Hakamivala
- Bioengineering Department, University of Texas at Arlington P. O. Box 19138 Arlington Texas 76019-0138 USA
| | - Liping Tang
- Bioengineering Department, University of Texas at Arlington P. O. Box 19138 Arlington Texas 76019-0138 USA
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University Kaohsiung 807 Taiwan
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24
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Kaklamani G, Kazaryan D, Bowen J, Iacovella F, Anastasiadis SH, Deligeorgis G. On the electrical conductivity of alginate hydrogels. Regen Biomater 2018; 5:293-301. [PMID: 30338127 PMCID: PMC6184632 DOI: 10.1093/rb/rby019] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 06/25/2018] [Accepted: 07/13/2018] [Indexed: 02/06/2023] Open
Abstract
Hydrogels have been extensively used in the field of biomedical applications, offering customizable natural, synthetic or hybrid materials, particularly relevant in the field of tissue engineering. In the bioelectronics discipline, hydrogels are promising mainly as sensing platforms with or without encapsulated cells, showing great potential in healthcare and medicine. However, to date there is little data in the literature which characterizes the electrical properties of tissue engineering materials which are relevant to bioelectronics. In this work, we present electrical characterization of alginate hydrogels, a natural polysaccharide, using a four-probe method similar to electrical impedance spectroscopy. The acquired conductance data show distinct frequency-dependent features that change as a function of alginate and crosslinker concentration reflecting ion kinetics inside the measured sample. Furthermore, the presence of NIH 3T3 fibroblasts encapsulated in the hydrogels matrix was found to alter the artificial tissue's electrical properties. The method used provides valuable insight to the frequency-dependent electrical response of the resulting systems. It is hoped that the outcome of this research will be of use in the development of cell/electronic interfaces, possibly toward diagnostic biosensors and therapeutic bioelectronics.
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Affiliation(s)
- Georgia Kaklamani
- Institute of Electronic Structure & Laser, Foundation for Research & Technology Hellas, P.O. Box 1385, Heraklion, Crete, Greece
| | - Diana Kazaryan
- Institute of Electronic Structure & Laser, Foundation for Research & Technology Hellas, P.O. Box 1385, Heraklion, Crete, Greece
| | - James Bowen
- School of Engineering and Innovation, The Open University, Milton Keynes, UK and
| | - Fabrice Iacovella
- Institute of Electronic Structure & Laser, Foundation for Research & Technology Hellas, P.O. Box 1385, Heraklion, Crete, Greece
| | - Spiros H Anastasiadis
- Institute of Electronic Structure & Laser, Foundation for Research & Technology Hellas, P.O. Box 1385, Heraklion, Crete, Greece
- Department of Chemistry, University of Crete, P.O. Box 2208, Heraklion, Crete, Greece
| | - George Deligeorgis
- Institute of Electronic Structure & Laser, Foundation for Research & Technology Hellas, P.O. Box 1385, Heraklion, Crete, Greece
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25
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Huang J, Li Z, Hu Q, Chen G, Ren Y, Wu X, Ren J. Bioinspired Anti-digestive Hydrogels Selected by a Simulated Gut Microfluidic Chip for Closing Gastrointestinal Fistula. iScience 2018; 8:40-48. [PMID: 30273911 PMCID: PMC6170257 DOI: 10.1016/j.isci.2018.09.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/29/2018] [Accepted: 09/07/2018] [Indexed: 02/07/2023] Open
Abstract
The anti-digestive features given to hydrogels can prolong their action time in gut environment; however, these types of hydrogels have rarely been reported. Inspired by indigestibility of dietary fibers, we introduced an injectable covalent hydrogel through photopolymerization of glycidyl methacrylate-modified xanthan. This newly synthesized hydrogel exhibited a specific concentration-dependent porosity, swelling ratio, and stiffness. The intestinal epithelial cells-6 could grow on the surface of the stiffer hydrogel, and achieved their gut barrier functions. A simulated gut microfluidic chip was manufactured to demonstrate the hydrogel's good performance of anti-digestion compared with the current product, fibrin sealant. Furthermore, calcium ions could induce the swelling-shrinking behavior of the hydrogel, which assisted in removing the hydrogels at the proper time so as to avoid the mismatch of hydrogel degradation and tissue regeneration. Therefore, this hydrogel is expected to be an outstanding gut repair material, especially for closing gastrointestinal fistula.
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Affiliation(s)
- Jinjian Huang
- School of Medicine, Southeast University, Nanjing, China; Lab for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China
| | - Zongan Li
- NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing, China
| | - Qiongyuan Hu
- Lab for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China
| | - Guopu Chen
- Lab for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China
| | - Yanhan Ren
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Xiuwen Wu
- Lab for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China
| | - Jianan Ren
- School of Medicine, Southeast University, Nanjing, China; Lab for Trauma and Surgical Infections, Department of Surgery, Jinling Hospital, 305 East Zhongshan Road, Nanjing 210002, China.
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26
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Kim I, Lee SS, Bae S, Lee H, Hwang NS. Heparin Functionalized Injectable Cryogel with Rapid Shape-Recovery Property for Neovascularization. Biomacromolecules 2018; 19:2257-2269. [PMID: 29689163 DOI: 10.1021/acs.biomac.8b00331] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cryogel based scaffolds have high porosity with interconnected macropores that may provide cell compatible microenvironment. In addition, cryogel based scaffolds can be utilized in minimally invasive surgery due to its sponge-like properties, including rapid shape recovery and injectability. Herein, we developed an injectable cryogel by conjugating heparin to gelatin as a carrier for vascular endothelial growth factor (VEGF) and fibroblasts in hindlimb ischemic disease. Our gelatin/heparin cryogel showed gelatin concentration-dependent mechanical properties, swelling ratios, interconnected porosities, and elasticities. In addition, controlled release of VEGF led to effective angiogenic responses both in vitro and in vivo. Furthermore, its sponge-like properties enabled cryogels to be applied as an injectable carrier system for in vivo cells and growth factor delivery. Our heparin functionalized injectable cryogel facilitated the angiogenic potential by facilitating neovascularization in a hindlimb ischemia model.
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Affiliation(s)
- Inseon Kim
- School of Chemical and Biological Engineering, the Institute of Chemical Processes , Seoul National University , Seoul , 08826 , Republic of Korea
| | - Seunghun S Lee
- Interdisciplinary Program in Bioengineering , Seoul National University , Seoul , 08826 , Republic of Korea
| | - Sunghoon Bae
- School of Chemical and Biological Engineering, the Institute of Chemical Processes , Seoul National University , Seoul , 08826 , Republic of Korea
| | - Hoyon Lee
- School of Chemical and Biological Engineering, the Institute of Chemical Processes , Seoul National University , Seoul , 08826 , Republic of Korea
| | - Nathaniel S Hwang
- School of Chemical and Biological Engineering, the Institute of Chemical Processes , Seoul National University , Seoul , 08826 , Republic of Korea.,Interdisciplinary Program in Bioengineering , Seoul National University , Seoul , 08826 , Republic of Korea.,BioMAX/N-Bio Institute , Seoul National University , Seoul , 08826 , Republic of Korea
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De France KJ, Xu F, Hoare T. Structured Macroporous Hydrogels: Progress, Challenges, and Opportunities. Adv Healthc Mater 2018; 7. [PMID: 29195022 DOI: 10.1002/adhm.201700927] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/15/2017] [Indexed: 12/15/2022]
Abstract
Structured macroporous hydrogels that have controllable porosities on both the nanoscale and the microscale offer both the swelling and interfacial properties of bulk hydrogels as well as the transport properties of "hard" macroporous materials. While a variety of techniques such as solvent casting, freeze drying, gas foaming, and phase separation have been developed to fabricate structured macroporous hydrogels, the typically weak mechanics and isotropic pore structures achieved as well as the required use of solvent/additives in the preparation process all limit the potential applications of these materials, particularly in biomedical contexts. This review highlights recent developments in the field of structured macroporous hydrogels aiming to increase network strength, create anisotropy and directionality within the networks, and utilize solvent-free or additive-free fabrication methods. Such functional materials are well suited for not only biomedical applications like tissue engineering and drug delivery but also selective filtration, environmental sorption, and the physical templating of secondary networks.
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Affiliation(s)
- Kevin J. De France
- Department of Chemical Engineering; McMaster University; 1280 Main Street West Hamilton ON L8S 4L8 Canada
| | - Fei Xu
- Department of Chemical Engineering; McMaster University; 1280 Main Street West Hamilton ON L8S 4L8 Canada
| | - Todd Hoare
- Department of Chemical Engineering; McMaster University; 1280 Main Street West Hamilton ON L8S 4L8 Canada
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