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Liu G, Ye S, Li Y, Yang J, Wang S, Liu Y, Yang S, Tian Y, Yin M, Cheng B. Copper ions-photo dual-crosslinked alginate hydrogel for angiogenesis and osteogenesis. J Biomed Mater Res A 2024. [PMID: 39228141 DOI: 10.1002/jbm.a.37790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 08/08/2024] [Accepted: 08/19/2024] [Indexed: 09/05/2024]
Abstract
Early healing of bone defects is still a clinical challenge. Many bone-filling materials have been studied, among which photocrosslinked alginate has received significant attention due to its good biocompatibility and morphological plasticity. Although it has been confirmed that photocrosslinked alginate can be used as an extracellular matrix for 3D cell culture, it lacks osteogenesis-related biological functions. This study constructed a copper ions-photo dual-crosslinked alginate hydrogel scaffold by controlling the copper ion concentration. The scaffolds were shaped by photocrosslinking and then endowed with biological functions by copper ions crosslinking. According to in vitro research, the dual-crosslinked hydrogel increased the compressive strength and favored copper dose-dependent osteoblast differentiation and cell surface adherence of rat bone marrow mesenchymal stem cells and the expression of type I collagen (Col1), runt-related transcription factor 2 (Runx2), osteocalcin (OCN), vascular endothelial growth factor (VEGF). In addition, hydrogel scaffolds were implanted into rat skull defects, and more angiogenesis and osteogenesis could be observed in in vivo studies. The above results show that the copper-photo-crosslinked hydrogel scaffold has excellent osseointegration properties and can potentially promote angiogenesis and early healing of bone defects, providing a reference solution for bone tissue engineering materials.
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Affiliation(s)
- Guochen Liu
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
- Department of Stomatology, Ezhou Central Hospital, Ezhou, Hubei, China
| | - Shanshan Ye
- Department of Stomatology, Ezhou Central Hospital, Ezhou, Hubei, China
| | - Yue Li
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Jing Yang
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Simin Wang
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yuan Liu
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Sisi Yang
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yinping Tian
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Miao Yin
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Bo Cheng
- Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
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2
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Lu Y, Lou X, Jiang J, Wang J, Peng X, Yao H, Wu J. Antioxidative, Anti-Inflammatory, Antibacterial, Photo-Cross-Linkable Hydrogel of Gallic Acid-Chitosan Methacrylate: Synthesis, In Vitro, and In Vivo Assessments. Biomacromolecules 2024; 25:4358-4373. [PMID: 38924782 DOI: 10.1021/acs.biomac.4c00410] [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: 06/28/2024]
Abstract
Chitosan (CS)-based photo-cross-linkable hydrogels have gained increasing attention in biomedical applications. In this study, we grafted CS with gallic acid (GA) by carbodiimide chemistry to prepare the GA-CS conjugate, which was subsequently modified with methacrylic anhydride (MA) modification to obtain the methacrylated GA-CS conjugate (GA-CS-MA). Our results demonstrated that the GA-CS-MA hydrogel not only exhibited improved physicochemical properties but also showed antibacterial, antioxidative, and anti-inflammatory capacity. It showed moderate antibacterial activity and especially showed a more powerful inhibitory effect against Gram-positive bacteria. It modulated macrophage polarization, downregulated pro-inflammatory gene expression, upregulated anti-inflammatory gene expression, and significantly reduced reactive oxygen species (ROS) and nitric oxide (NO) production under lipopolysaccharide (LPS) stimulation. Subcutaneously implanted GA-CS-MA hydrogels induced significantly lower inflammatory responses, as evidenced by less inflammatory cell infiltration, thinner fibrous capsule, and predominately promoted M2 polarization. This study provides a feasible strategy to prepare CS-based photo-cross-linkable hydrogels with improved physicochemical properties for biomedical applications.
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Affiliation(s)
- Yifan Lu
- Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, Department of Biomedical Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Xiangxin Lou
- Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, Department of Biomedical Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Jia Jiang
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, P. R. China
| | - Jiaxing Wang
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, P. R. China
| | - Xiaochun Peng
- Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, P. R. China
| | - Haochen Yao
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, First Hospital of Jilin University, Changchun 130021, P. R. China
| | - Jinglei Wu
- Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, Department of Biomedical Engineering, Donghua University, Shanghai 201620, P. R. China
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Rana MM, De la Hoz Siegler H. Evolution of Hybrid Hydrogels: Next-Generation Biomaterials for Drug Delivery and Tissue Engineering. Gels 2024; 10:216. [PMID: 38667635 PMCID: PMC11049329 DOI: 10.3390/gels10040216] [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: 02/28/2024] [Revised: 03/14/2024] [Accepted: 03/19/2024] [Indexed: 04/28/2024] Open
Abstract
Hydrogels, being hydrophilic polymer networks capable of absorbing and retaining aqueous fluids, hold significant promise in biomedical applications owing to their high water content, permeability, and structural similarity to the extracellular matrix. Recent chemical advancements have bolstered their versatility, facilitating the integration of the molecules guiding cellular activities and enabling their controlled activation under time constraints. However, conventional synthetic hydrogels suffer from inherent weaknesses such as heterogeneity and network imperfections, which adversely affect their mechanical properties, diffusion rates, and biological activity. In response to these challenges, hybrid hydrogels have emerged, aiming to enhance their strength, drug release efficiency, and therapeutic effectiveness. These hybrid hydrogels, featuring improved formulations, are tailored for controlled drug release and tissue regeneration across both soft and hard tissues. The scientific community has increasingly recognized the versatile characteristics of hybrid hydrogels, particularly in the biomedical sector. This comprehensive review delves into recent advancements in hybrid hydrogel systems, covering the diverse types, modification strategies, and the integration of nano/microstructures. The discussion includes innovative fabrication techniques such as click reactions, 3D printing, and photopatterning alongside the elucidation of the release mechanisms of bioactive molecules. By addressing challenges, the review underscores diverse biomedical applications and envisages a promising future for hybrid hydrogels across various domains in the biomedical field.
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Affiliation(s)
- Md Mohosin Rana
- Department of Pathology and Laboratory Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z7, Canada;
- Centre for Blood Research, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Hector De la Hoz Siegler
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
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Sundaran S, Kok LC, Chang HY. Fabrication and in vitroevaluation of photo cross-linkable silk fibroin-epsilon-poly-L-lysine hydrogel for wound repair. Biomed Mater 2023; 18:055021. [PMID: 37567188 DOI: 10.1088/1748-605x/acef86] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/10/2023] [Indexed: 08/13/2023]
Abstract
An optimal wound-healing hydrogel requires effective antibacterial properties and a favorable cell adhesion and proliferation environment. AlthoughBombyx morisilk fibroin (SF) possesses inherent wound-healing properties, it lacks these essential qualities. This study aimed to fabricate a novel photo-polymerizable hydrogel by utilizing SF's wound-healing efficiency and the epsilon-poly-L-lysine (EPL) antimicrobial activity. The SF was modified with three different concentrations of glycidyl methacrylate (GMA) to obtain SF-GMA(L), SF-GMA(M), and SF-GMA(H). A methacrylated EPL (EPL-GMA) was also produced. Then, SF-GMA was mixed with EPL-GMA to produce photo-crosslinkable SF-GMA-EPL hydrogels. The SF-GMA(L)-EPL, SF-GMA(M)-EPL, and SF-GMA(H)-EPL hydrogels, fabricated with 20% EPL-GMA, demonstrated maximum antimicrobial activity and mammalian cell adhesion ability. The hydroxyl radical (•OH) scavenging efficiency of the hydrogels was tested and shown to be between 69% and 74%. These hydrogels also exhibited 60% efficiency in removing bacterial lipopolysaccharides. The water absorption ability of the hydrogels was consistent with the size of their internal pores. The hydrogels exhibited a slow degradation fashion, and their degradation products appeared cytocompatible. Finally, the elastomeric properties of the hydrogels were determined, and a storage modulus (G') of 300-600 Pa was demonstrated. In conclusion, the hydrogels created in this study possess excellent biological and physical properties to support wound healing.
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Affiliation(s)
- Sneha Sundaran
- Institute of Molecular Medicine, National Tsing Hua University, Hsin Chu, Taiwan
| | - Li-Ching Kok
- Institute of Molecular Medicine, National Tsing Hua University, Hsin Chu, Taiwan
| | - Hwan-You Chang
- Institute of Molecular Medicine, National Tsing Hua University, Hsin Chu, Taiwan
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Tan J, Luo Y, Guo Y, Zhou Y, Liao X, Li D, Lai X, Liu Y. Development of alginate-based hydrogels: Crosslinking strategies and biomedical applications. Int J Biol Macromol 2023; 239:124275. [PMID: 37011751 DOI: 10.1016/j.ijbiomac.2023.124275] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/10/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023]
Abstract
Natural polysaccharide-based hydrogels have drawn much concern in the biomedical fields. Among them, alginate, a natural polyanionic polysaccharide, has become one of the research hotspots, because of its abundant source, biodegradability, biocompatibility, solubility, modification flexibility, and other characteristics or physiological functions. Recently, through adopting various physical or chemical crosslinking strategies, selecting suitable crosslinking or modification reagents, precisely controlling the reaction conditions, or introducing organic or inorganic functional materials, a variety of alginate-based hydrogels with excellent performance have been continuously developed, considerably expanding the breadth and depth of their applications. Here, various crosslinking strategies in the preparation of alginate-based hydrogels are comprehensively introduced. The representative application progress of alginate-based hydrogels in drug carrier, wound dressing and tissue engineering is also summarized. Meanwhile, the application prospects, challenges and development trends of alginate-based hydrogels are discussed. It is expected to provide guidance and reference for the further development of alginate-based hydrogels.
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Li S, Xiaowen Y, Yang Y, Liu L, Sun Y, Liu Y, Yin L, Chen Z. Osteogenic and anti-inflammatory effect of the multifunctional bionic hydrogel scaffold loaded with aspirin and nano-hydroxyapatite. Front Bioeng Biotechnol 2023; 11:1105248. [PMID: 36761294 PMCID: PMC9902883 DOI: 10.3389/fbioe.2023.1105248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 01/13/2023] [Indexed: 01/26/2023] Open
Abstract
Although tissue engineering offered new approaches to repair bone defects, it remains a great challenge to create a bone-friendly microenvironment and rebuild bone tissue rapidly by a scaffold with a bionic structure. In this study, a multifunctional structurally optimized hydrogel scaffold was designed by integrating polyvinyl alcohol (PVA), gelatin (Gel), and sodium alginate (SA) with aspirin (ASA) and nano-hydroxyapatite (nHAP). The fabrication procedure is through a dual-crosslinking process. The chemical constitution, crystal structure, microstructure, porosity, mechanical strength, swelling and degradation property, and drug-release behavior of the hydrogel scaffold were analyzed. Multi-hydrogen bonds, electrostatic interactions, and strong "egg-shell" structure contributed to the multi-network microstructure, bone tissue-matched properties, and desirable drug-release function of the hydrogel scaffold. The excellent performance in improving cell viability, promoting cell osteogenic differentiation, and regulating the inflammatory microenvironment of the prepared hydrogel scaffold was verified using mouse pre-osteoblasts (MC3T3-E1) cells. And the synergistic osteogenic and anti-inflammatory functions of aspirin and nano-hydroxyapatite were also verified. This study provided valuable insights into the design, fabrication, and biological potential of multifunctional bone tissue engineering materials with the premise of constructing a bone-friendly microenvironment.
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Affiliation(s)
- Shaoping Li
- Key Laboratory of Stomatology in Hebei Province, Hospital of Stomatology Hebei Medical University, Shijiazhuang, China
| | - Yundeng Xiaowen
- Key Laboratory of Stomatology in Hebei Province, Hospital of Stomatology Hebei Medical University, Shijiazhuang, China
| | - Yuqing Yang
- Key Laboratory of Stomatology in Hebei Province, Hospital of Stomatology Hebei Medical University, Shijiazhuang, China
| | - Libo Liu
- College of Dentistry, Hebei Medical University, Shijiazhuang, China
| | - Yifan Sun
- College of Dentistry, Hebei Medical University, Shijiazhuang, China
| | - Ying Liu
- College of Dentistry, Hebei Medical University, Shijiazhuang, China
| | - Lulu Yin
- College of Dentistry, Hebei Medical University, Shijiazhuang, China
| | - Zhiyu Chen
- Key Laboratory of Stomatology in Hebei Province, Hospital of Stomatology Hebei Medical University, Shijiazhuang, China,*Correspondence: Zhiyu Chen,
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Pazarçeviren AE, Evis Z, Dikmen T, Altunbaş K, Yaprakçı MV, Keskin D, Tezcaner A. Alginate/gelatin/boron-doped hydroxyapatite-coated Ti implants: in vitro and in vivo evaluation of osseointegration. Biodes Manuf 2023. [DOI: 10.1007/s42242-022-00218-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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8
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Singh YP, Mishra B, Gupta MK, Bhaskar R, Han SS, Mishra NC, Dasgupta S. Gelatin/monetite electrospun scaffolds to regenerate bone tissue: Fabrication, characterization, and in-vitro evaluation. J Mech Behav Biomed Mater 2023; 137:105524. [PMID: 36332397 DOI: 10.1016/j.jmbbm.2022.105524] [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: 08/25/2022] [Revised: 10/09/2022] [Accepted: 10/13/2022] [Indexed: 11/08/2022]
Abstract
This work is dedicated to combining nanotechnology with bone tissue engineering to prepare and characterize electrospun gelatin/monetite nanofibrous scaffold with improved physicochemical, mechanical, and biological properties. Nanofibrous scaffolds possessing fiber diameter in the range of 242-290 nm were prepared after incorporating varying content of monetite nanoparticles up to 7 wt % into the gelatin matrix using the electrospinning technique. Cross-linking of gelatin chains in the scaffold was performed using 0.25 wt% glutaraldehyde as indicated by imine (-CN-) bond formation in the FTIR analysis. With an increase in monetite addition up to 7 wt%, a decrease in swelling ratio and bio-degradability of cross-linked gelatin scaffolds was observed. Gelatin scaffold with 7 wt% monetite content registered the highest values of tensile strength and tensile modulus of 18.8 MPa and 170 MPa, as compared to 0% and 5 wt% monetite containing scaffolds respectively. Cell viability and differentiation were studied after culturing MG-63 cells onto the scaffolds from confocal microscopy of live and dead cells images, MTT assay, and alkaline phosphatase assay for a cell culture period of up to 21 days. It was observed that 7 wt % monetite containing gelatin scaffold exhibited better MG-63 cell adhesion, proliferation, higher biomineralization, and ALP activity compared to 0% and 5 wt% monetite containing electrospun scaffolds studied here.
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Affiliation(s)
- Yogendra Pratap Singh
- Department of Ceramic Engineering, National Institute of Technology Rourkela, Odisha, 769008, India
| | - Balaram Mishra
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, 769008, India
| | - Mukesh Kumar Gupta
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, 769008, India
| | - Rakesh Bhaskar
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea.
| | - Sung Soo Han
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea
| | - Narayan Chandra Mishra
- Department of Polymer & Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Uttar Pradesh, 247001, India
| | - Sudip Dasgupta
- Department of Ceramic Engineering, National Institute of Technology Rourkela, Odisha, 769008, India.
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Wang E, Wen H, Guo P, Luo Y, Wang C, He Z, Pan J, Chen X, Cao B, Wang Y, Huang S, Xue W. Fabrication of methacrylated casein/alginate microspheres crosslinked by UV light coupled with Ca2+ chelation for pH-sensitive drug delivery. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-021-04917-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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The influence of 3‐glycidyloxypropyl trimethoxysilane on the rheological and in‐vitro behavior of injectable composites containing
64S
bioactive glass, chitosan, and gelatin. J Appl Polym Sci 2021. [DOI: 10.1002/app.50963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Anita Lett J, Sagadevan S, Fatimah I, Hoque ME, Lokanathan Y, Léonard E, Alshahateet SF, Schirhagl R, Oh WC. Recent advances in natural polymer-based hydroxyapatite scaffolds: Properties and applications. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110360] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Wu T, Cui C, Fan C, Xu Z, Liu Y, Liu W. Tea eggs-inspired high-strength natural polymer hydrogels. Bioact Mater 2021; 6:2820-2828. [PMID: 33718664 PMCID: PMC7903155 DOI: 10.1016/j.bioactmat.2021.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/04/2021] [Accepted: 02/07/2021] [Indexed: 12/12/2022] Open
Abstract
Natural polymer (NP) hydrogels are an irreplaceable class of biomaterials owing to their identified biosafety; however, the intrinsic poor mechanical strengths severely limit their applications as structural tissue engineering scaffolds. Inspired by the stiffening albumen gel of tea eggs, a traditional Chinese snack, high-strength NP hydrogels are constructed by simply soaking in aqueous solution of tea polyphenols (TP), an active ingredient extracted from tea. The TP-treated representative NP hydrogels exhibit considerably enhanced multifaceted mechanical properties with maximum 19-/30-, 8.4-, 6.1-, 72-fold increases in tensile/compressive strengths, Young's modulus, elongation at break and facture toughness, respectively, compared with pristine hydrogels, primarily due to the hydrogen bonding interactions between TP and NP chains. The TP-treated NP hydrogels can resist different large deformations, which cannot be achieved by their original species at all. In aqueous solution, the TP-treated NP hydrogels can still maintain robust mechanical performances, in spite of somewhat decline in strengths with release of TP, which just favorably affords increased water contents, antibacterial and antioxidant activities. GelMA-TP hydrogel is shown to facilitate wound healing in a full-thickness skin defect model. Importantly, the weak 3D printed GelMA scaffolds are significantly strengthened by TP treatment, broadening the possibility for customizing individualized bioscaffolds. Tea eggs-inspired high-strength natural polymer (NP) hydrogels are prepared. Tea polyphenols strengthen considerably 3D-printed NP hydrogel scaffolds. The NP-TP hydrogels exhibit antibacterial and antioxidant activities.
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Affiliation(s)
- Tengling Wu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Chunyan Cui
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Chuanchuan Fan
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Ziyang Xu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Yang Liu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Wenguang Liu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
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Mishra B, Murthy G, Sahoo B, Uhm SJ, Gupta MK. Combinatorial ethanol treatment increases the overall productivity of recombinant hG-CSF in E. coli: a comparative study. Appl Microbiol Biotechnol 2020; 104:9135-9145. [PMID: 32945902 DOI: 10.1007/s00253-020-10899-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/03/2020] [Accepted: 09/08/2020] [Indexed: 12/22/2022]
Abstract
Human granulocyte colony-stimulating factor (hG-CSF) is a cytokine that regulates the proliferation, maturation, and differentiation of precursor cells to neutrophils. In the present study, we report the feasibility of inducing recombinant hG-CSF expression (rhG-CSF) in a pET vector system by combinatorial induction using low-concentration ethanol, IPTG, and lactose and auto-induction media (AIM). The coding sequence of hG-CSF transcript variant 2 was expressed in pET14 vector, and the effect of combinatorial induction was analyzed on inclusion body (IB) formation, biomass, protein purification, and bioactivity. Results showed that there was an inverse relationship between the temperature and soluble expression of rhG-CSF. Three-step washing with Triton-X, 2 M, and 5 M urea resulted in the maximum recovery of IBs. Combinatorial single-spike induction with IPTG, ethanol, and lactose in a batch culture led to a 3-fold increase in the expression of rhG-CSF. It was also observed that low concentration of ethanol (1-3% v/v) could be used in lieu of IPTG for inducing the rhG-CSF protein expression without adversely affecting biomass production. A 2.4-fold increase in productivity was obtained in LB-AIM media with combinatorial ethanol induction, and the overall yield of 2.8 g/L rhG-CSF was found. The purified rhG-CSF was bioactive and increased the cellular proliferation of umbilical cord blood-derived mesenchymal stem cells (U-MSC) by 29%. In conclusion, our study shows that combined ethanol induction can enhance the expression of rhG-CSF with three-step washing for recovery of the proteins from IBs and a single-step purification of rhG-CSF by affinity chromatography. KEY POINTS: • Low concentration of ethanol (1-3%) could be used in lieu of IPTG for inducing rhG-CSF expression. • Combinatorial single-spike induction with IPTG, ethanol, and lactose improved rhG-CSF expression. • Purified rhG-CSF was bioactive and increased the proliferation of U-MSC.
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Affiliation(s)
- Balaram Mishra
- Gene Manipulation Laboratory, Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India
| | - Giridharan Murthy
- Gene Manipulation Laboratory, Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India
| | - Bijayalaxmi Sahoo
- Gene Manipulation Laboratory, Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India
| | - Sang Jun Uhm
- Department of Animal Science, Sangji University, Wonju, 26339, South Korea
| | - Mukesh Kumar Gupta
- Gene Manipulation Laboratory, Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India.
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