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Tian Z, Zhao Z, Rausch MA, Behm C, Shokoohi-Tabrizi HA, Andrukhov O, Rausch-Fan X. In Vitro Investigation of Gelatin/Polycaprolactone Nanofibers in Modulating Human Gingival Mesenchymal Stromal Cells. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7508. [PMID: 38138649 PMCID: PMC10744501 DOI: 10.3390/ma16247508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/30/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023]
Abstract
The aesthetic constancy and functional stability of periodontium largely depend on the presence of healthy mucogingival tissue. Soft tissue management is crucial to the success of periodontal surgery. Recently, synthetic substitute materials have been proposed to be used for soft tissue augmentation, but the tissue compatibility of these materials needs to be further investigated. This study aims to assess the in vitro responses of human gingival mesenchymal stromal cells (hG-MSCs) cultured on a Gelatin/Polycaprolactone prototype (GPP) and volume-stable collagen matrix (VSCM). hG-MSCs were cultured onto the GPP, VSCM, or plastic for 3, 7, and 14 days. The proliferation and/or viability were measured by cell counting kit-8 assay and resazurin-based toxicity assay. Cell morphology and adhesion were evaluated by microscopy. The gene expression of collagen type I, alpha1 (COL1A1), α-smooth muscle actin (α-SMA), fibroblast growth factor (FGF-2), vascular endothelial growth factor A (VEGF-A), transforming growth factor beta-1 (TGF-β1), focal adhesion kinase (FAK), integrin beta-1 (ITG-β1), and interleukin 8 (IL-8) was investigated by RT-qPCR. The levels of VEGF-A, TGF-β1, and IL-8 proteins in conditioned media were tested by ELISA. GPP improved both cell proliferation and viability compared to VSCM. The cells grown on GPP exhibited a distinct morphology and attachment performance. COL1A1, α-SMA, VEGF-A, FGF-2, and FAK were positively modulated in hG-MSCs on GPP at different investigation times. GPP increased the gene expression of TGF-β1 but had no effect on protein production. The level of ITG-β1 had no significant changes in cells seeded on GPP at 7 days. At 3 days, notable differences in VEGF-A, TGF-β1, and α-SMA expression levels were observed between cells seeded on GPP and those on VSCM. Meanwhile, GPP showed higher COL1A1 expression compared to VSCM after 14 days, whereas VSCM demonstrated a more significant upregulation in the production of IL-8. Taken together, our data suggest that GPP electrospun nanofibers have great potential as substitutes for soft tissue regeneration in successful periodontal surgery.
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Affiliation(s)
- Zhiwei Tian
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria; (Z.T.); (Z.Z.); (M.A.R.); (C.B.)
| | - Zhongqi Zhao
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria; (Z.T.); (Z.Z.); (M.A.R.); (C.B.)
| | - Marco Aoqi Rausch
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria; (Z.T.); (Z.Z.); (M.A.R.); (C.B.)
- Clinical Division of Orthodontics, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria
| | - Christian Behm
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria; (Z.T.); (Z.Z.); (M.A.R.); (C.B.)
| | - Hassan Ali Shokoohi-Tabrizi
- Core Facility Applied Physics, Laser and CAD/CAM Technology, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria;
| | - Oleh Andrukhov
- Competence Center for Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria; (Z.T.); (Z.Z.); (M.A.R.); (C.B.)
| | - Xiaohui Rausch-Fan
- Center for Clinical Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria;
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, 1090 Wien, Austria
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Zhao T, Li X, Li H, Deng H, Li J, Yang Z, He S, Jiang S, Sui X, Guo Q, Liu S. Advancing drug delivery to articular cartilage: From single to multiple strategies. Acta Pharm Sin B 2023; 13:4127-4148. [PMID: 37799383 PMCID: PMC10547919 DOI: 10.1016/j.apsb.2022.11.021] [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: 08/02/2022] [Revised: 10/09/2022] [Accepted: 10/28/2022] [Indexed: 11/27/2022] Open
Abstract
Articular cartilage (AC) injuries often lead to cartilage degeneration and may ultimately result in osteoarthritis (OA) due to the limited self-repair ability. To date, numerous intra-articular delivery systems carrying various therapeutic agents have been developed to improve therapeutic localization and retention, optimize controlled drug release profiles and target different pathological processes. Due to the complex and multifactorial characteristics of cartilage injury pathology and heterogeneity of the cartilage structure deposited within a dense matrix, delivery systems loaded with a single therapeutic agent are hindered from reaching multiple targets in a spatiotemporal matched manner and thus fail to mimic the natural processes of biosynthesis, compromising the goal of full cartilage regeneration. Emerging evidence highlights the importance of sequential delivery strategies targeting multiple pathological processes. In this review, we first summarize the current status and progress achieved in single-drug delivery strategies for the treatment of AC diseases. Subsequently, we focus mainly on advances in multiple drug delivery applications, including sequential release formulations targeting various pathological processes, synergistic targeting of the same pathological process, the spatial distribution in multiple tissues, and heterogeneous regeneration. We hope that this review will inspire the rational design of intra-articular drug delivery systems (DDSs) in the future.
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Affiliation(s)
- Tianyuan Zhao
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Xu Li
- Musculoskeletal Research Laboratory, Department of Orthopedics & Traumatology, The Chinese University of Hong Kong, 999077, Hong Kong, China
| | - Hao Li
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Haoyuan Deng
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Jianwei Li
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Zhen Yang
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing 100044, China
| | - Songlin He
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Shuangpeng Jiang
- Department of Joint Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
| | - Xiang Sui
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
| | - Quanyi Guo
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Shuyun Liu
- Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
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3
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Shi M, McHugh KJ. Strategies for overcoming protein and peptide instability in biodegradable drug delivery systems. Adv Drug Deliv Rev 2023; 199:114904. [PMID: 37263542 PMCID: PMC10526705 DOI: 10.1016/j.addr.2023.114904] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/18/2023] [Accepted: 05/24/2023] [Indexed: 06/03/2023]
Abstract
The global pharmaceutical market has recently shifted its focus from small molecule drugs to peptide, protein, and nucleic acid drugs, which now comprise a majority of the top-selling pharmaceutical products on the market. Although these biologics often offer improved drug specificity, new mechanisms of action, and/or enhanced efficacy, they also present new challenges, including an increased potential for degradation and a need for frequent administration via more invasive administration routes, which can limit patient access, patient adherence, and ultimately the clinical impact of these drugs. Controlled-release systems have the potential to mitigate these challenges by offering superior control over in vivo drug levels, localizing these drugs to tissues of interest (e.g., tumors), and reducing administration frequency. Unfortunately, adapting controlled-release devices to release biologics has proven difficult due to the poor stability of biologics. In this review, we summarize the current state of controlled-release peptides and proteins, discuss existing techniques used to stabilize these drugs through encapsulation, storage, and in vivo release, and provide perspective on the most promising opportunities for the clinical translation of controlled-release peptides and proteins.
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Affiliation(s)
- Miusi Shi
- Department of Bioengineering, Rice University, Houston, TX 77030, USA; The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, PR China
| | - Kevin J McHugh
- Department of Bioengineering, Rice University, Houston, TX 77030, USA; Department of Chemistry, Rice University, Houston, TX 77030, USA.
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Moreno-Castellanos N, Cuartas-Gómez E, Vargas-Ceballos O. Functionalized Collagen/Poly(ethylene glycol) Diacrylate Interpenetrating Network Hydrogel Enhances Beta Pancreatic Cell Sustenance. Gels 2023; 9:496. [PMID: 37367166 DOI: 10.3390/gels9060496] [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: 05/30/2023] [Revised: 06/08/2023] [Accepted: 06/11/2023] [Indexed: 06/28/2023] Open
Abstract
Three-dimensional matrices are a new strategy used to tackle type I diabetes, a chronic metabolic disease characterized by the destruction of beta pancreatic cells. Type I collagen is an abundant extracellular matrix (ECM), a component that has been used to support cell growth. However, pure collagen possesses some difficulties, including a low stiffness and strength and a high susceptibility to cell-mediated contraction. Therefore, we developed a collagen hydrogel with a poly (ethylene glycol) diacrylate (PEGDA) interpenetrating network (IPN), functionalized with vascular endothelial growth factor (VEGF) to mimic the pancreatic environment for the sustenance of beta pancreatic cells. We analyzed the physicochemical characteristics of the hydrogels and found that they were successfully synthesized. The mechanical behavior of the hydrogels improved with the addition of VEGF, and the swelling degree and the degradation were stable over time. In addition, it was found that 5 ng/mL VEGF-functionalized collagen/PEGDA IPN hydrogels sustained and enhanced the viability, proliferation, respiratory capacity, and functionality of beta pancreatic cells. Hence, this is a potential candidate for future preclinical evaluation, which may be favorable for diabetes treatment.
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Affiliation(s)
- Natalia Moreno-Castellanos
- Centro de Cromatografía y Espectrometría de Masas, CROM-MASS, Universidad Industrial de Santander, Cra 27 calle 9, Bucaramanga 680002, Colombia
| | - Elías Cuartas-Gómez
- CICTA Research Group, Department of Basic Sciences, Medicine School, Health Faculty, Universidad Industrial de Santander, Cra 27 calle 9, Bucaramanga 680002, Colombia
| | - Oscar Vargas-Ceballos
- GIMAT Research Group, Escuela de Ingeniería Metalúrgica y Ciencia de Materiales, Universidad Industrial de Santander, Cra 27 calle 9, Bucaramanga 680002, Colombia
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Elango J. Proliferative and Osteogenic Supportive Effect of VEGF-Loaded Collagen-Chitosan Hydrogel System in Bone Marrow Derived Mesenchymal Stem Cells. Pharmaceutics 2023; 15:pharmaceutics15041297. [PMID: 37111780 PMCID: PMC10143960 DOI: 10.3390/pharmaceutics15041297] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/17/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
The use of hydrogel (HG) in regenerative medicine is an emerging field and thus several approaches have been proposed recently to find an appropriate hydrogel system. In this sense, this study developed a novel HG system using collagen, chitosan, and VEGF composites for culturing mesenchymal stem cells (MSCs), and investigated their ability for osteogenic differentiation and mineral deposition. Our results showed that the HG loaded with 100 ng/mL VEGF (HG-100) significantly supported the proliferation of undifferentiated MSCs, the fibrillary filament structure (HE stain), mineralization (alizarin red S and von Kossa stain), alkaline phosphatase, and the osteogenesis of differentiated MSCs compared to other hydrogels (loaded with 25 and 50 ng/mL VEGF) and control (without hydrogel). HG-100 showed a higher VEGF releasing rate from day 3 to day 7 than other HGs, which substantially supports the proliferative and osteogenic properties of HG-100. However, the HGs did not increase the cell growth in differentiated MSCs on days 14 and 21 due to the confluence state (reach stationary phase) and cell loading ability, regardless of the VEGF content. Similarly, the HGs alone did not stimulate the osteogenesis of MSCs; however, they increased the osteogenic ability of MSCs in presence of osteogenic supplements. Accordingly, a fabricated HG with VEGF could be used as an appropriate system to culture stem cells for bone and dental regeneration.
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Affiliation(s)
- Jeevithan Elango
- Department of Biomaterials Engineering, Faculty of Health Sciences, UCAM-Universidad Católica San Antonio de Murcia, Campus de los Jerónimos 135, Guadalupe, 30107 Murcia, Spain
- Center of Molecular Medicine and Diagnostics (COMManD), Department of Biochemistry, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, India
- Department of Marine Biopharmacology, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
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Wang X, Ma Y, Lu F, Chang Q. The diversified hydrogels for biomedical applications and their imperative roles in tissue regeneration. Biomater Sci 2023; 11:2639-2660. [PMID: 36790251 DOI: 10.1039/d2bm01486f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Repair and regeneration of tissues after injury are complex pathophysiological processes. Microbial infection, malnutrition, and an ischemic and hypoxic microenvironment in the injured area can impede the typical healing cascade. Distinguished by biomimicry of the extracellular matrix, high aqueous content, and diverse functions, hydrogels have revolutionized clinical practices in tissue regeneration owing to their outstanding hydrophilicity, biocompatibility, and biodegradability. Various hydrogels such as smart hydrogels, nanocomposite hydrogels, and acellular matrix hydrogels are widely used for applications ranging from bench-scale to an industrial scale. In this review, some emerging hydrogels in the biomedical field are briefly discussed. The protective roles of hydrogels in wound dressings and their diverse biological effects on multiple tissues such as bone, cartilage, nerve, muscle, and adipose tissue are also discussed. The vehicle functions of hydrogels for chemicals and cell payloads are detailed. Additionally, this review emphasizes the particular characteristics of hydrogel products that promote tissue repair and reconstruction such as anti-infection, inflammation regulation, and angiogenesis.
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Affiliation(s)
- Xinhui Wang
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, 510515, China.
| | - Yuan Ma
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, 510515, China.
| | - Feng Lu
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, 510515, China.
| | - Qiang Chang
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, 510515, China.
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7
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Elango J, Lijnev A, Zamora-Ledezma C, Alexis F, Wu W, Marín JMG, Sanchez de Val JEM. The Relationship of Rheological Properties and the Performance of Silk Fibroin Hydrogels in Tissue Engineering Application. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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8
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Kumeria T, Wang J, Kim B, Park JH, Zuidema JM, Klempner M, Cavacini L, Wang Y, Sailor MJ. Enteric Polymer-Coated Porous Silicon Nanoparticles for Site-Specific Oral Delivery of IgA Antibody. ACS Biomater Sci Eng 2022; 8:4140-4152. [PMID: 36210772 PMCID: PMC10036216 DOI: 10.1021/acsbiomaterials.0c01313] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Porous silicon (pSi) nanoparticles are loaded with Immunoglobulin A-2 (IgA2) antibodies, and the assembly is coated with pH-responsive polymers on the basis of the Eudragit family of enteric polymers (L100, S100, and L30-D55). The temporal release of the protein from the nanocomposite formulations is quantified following an in vitro protocol simulating oral delivery: incubation in simulated gastric fluid (SGF; at pH 1.2) for 2 h, followed by a fasting state simulated intestinal fluid (FasSIF; at pH 6.8) or phosphate buffer solution (PBS; at pH 7.4). The nanocomposite formulations display a negligible release in SGF, while more than 50% of the loaded IgA2 is released in solutions at a pH of 6.8 (FasSIF) or 7.4 (PBS). Between 21 and 44% of the released IgA2 retains its functional activity. A capsule-based system is also evaluated, where the IgA2-loaded particles are packed into a gelatin capsule and the capsule is coated with either EudragitL100 or EudragitS100 polymer for a targeted release in the small intestine or the colon, respectively. The capsule-based formulations outperform polymer-coated nanoparticles in vitro, preserving 45-54% of the activity of the released protein.
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Affiliation(s)
- Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
- School of Materials Science and Engineering, University of New South Wales-Sydney, Sydney, NSW 2052, Australia
| | - Joanna Wang
- Materials Science and Engineering Program, University of California, San Diego, California 92093, United States
| | - Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, California 92093, United States
| | - Ji-Ho Park
- Department of Bio and Brain Engineering, KAIST, Daejeon 34141, Korea
| | - Jonathan M Zuidema
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Mark Klempner
- MassBiologics of the University of Massachusetts Medical School, Boston, Massachusetts 02126, United States
| | - Lisa Cavacini
- MassBiologics of the University of Massachusetts Medical School, Boston, Massachusetts 02126, United States
| | - Yang Wang
- MassBiologics of the University of Massachusetts Medical School, Boston, Massachusetts 02126, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
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Kasai RD, Radhika D, Archana S, Shanavaz H, Koutavarapu R, Lee DY, Shim J. A review on hydrogels classification and recent developments in biomedical applications. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2075872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- R. Deepak Kasai
- Department of Chemistry, Faculty of Engineering and Technology, Jain-Deemed to be University, Ramnagara, India
| | - Devi Radhika
- Department of Chemistry, Faculty of Engineering and Technology, Jain-Deemed to be University, Ramnagara, India
| | - S. Archana
- Department of Chemistry, Faculty of Engineering and Technology, Jain-Deemed to be University, Ramnagara, India
| | - H. Shanavaz
- Department of Chemistry, Faculty of Engineering and Technology, Jain-Deemed to be University, Ramnagara, India
| | - Ravindranadh Koutavarapu
- Department of Robotics Engineering, College of Mechanical and IT Engineering, Yeungnam University, Gyeongsan, South Korea
| | - Dong-Yeon Lee
- Department of Robotics Engineering, College of Mechanical and IT Engineering, Yeungnam University, Gyeongsan, South Korea
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, South Korea
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10
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Kant RJ, Bare CF, Coulombe KL. Tissues with Patterned Vessels or Protein Release Induce Vascular Chemotaxis in an In Vitro Platform. Tissue Eng Part A 2021; 27:1290-1304. [PMID: 33472529 PMCID: PMC8610033 DOI: 10.1089/ten.tea.2020.0269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 01/11/2021] [Indexed: 12/14/2022] Open
Abstract
Engineered tissues designed for translational applications in regenerative medicine require vascular networks to deliver oxygen and nutrients rapidly to the implanted cells. A limiting factor of in vivo translation is the rapid and successful inosculation, or connection, of host and implanted vascular networks and subsequent perfusion of the implant. An approach gaining favor in vascular tissue engineering is to provide instructive cues from the engineered tissue to enhance host vascular penetration and connection with the implant. Here, we use a novel in vitro platform based on the aortic ring assay to evaluate the impact of patterned, endothelialized vessels or growth factor release from engineered constructs on preinosculative vascular cell outgrowth from surrogate host tissue in a controlled, defined environment, and introduce robust tools for evaluating vascular morphogenesis and chemotaxis. We demonstrate the creation of engineered vessels at the arteriole scale, which develop basement membrane, exhibit tight junctions, and actively sprout into the surrounding bulk hydrogel. Vessel-containing constructs are co-cultured adjacent to rodent aortic rings, and the resulting heterocellular outgrowth is quantified. Cells originating from the aortic ring migrate preferentially toward constructs containing engineered vessels with 1.5-fold faster outgrowth kinetics, 2.5-fold increased cellular density, and 1.6-fold greater network formation versus control (no endothelial cells and growth factor-reduced culture medium). Growth factor release from constructs with nonendothelialized channels and in reduced factor medium equivalently stimulates sustained vascular outgrowth distance, cellular density, and network formation, akin to engineered vessels in endothelial growth medium 2 (EGM-2) medium. In conclusion, we show that three-dimensional endothelialized patterned vessels or growth factor release stimulate a robust, host-derived vascular cell chemotactic response at early time points critical for instructive angiogenic cues. Further, we developed robust, unbiased tools to quantify metrics of vascular morphogenesis and preinosculative heterocellular outgrowth from rat aortic rings and demonstrated the utility of our complex, controlled environment, heterocellular in vitro platform. Impact statement Using a novel in vitro platform, we show that engineered constructs with patterned vessels or angiogenic growth factor release, two methods of instructing host revascularization responses, equivalently improve early host-derived vascular outgrowth. Our platform leverages the aortic ring assay in a tissue engineering context to study preinosculative vascular cell chemotaxis from surrogate host vascular cells in response to paracrine cues from co-cultured engineered tissues using robust, open-source quantification tools. Our accessible and flexible platform enables translationally focused studies in revascularization using implantable therapeutics containing prepatterned vessels with greater environmental control than in vivo studies to advance vascular tissue engineering.
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Affiliation(s)
- Rajeev J. Kant
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Colette F. Bare
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Kareen L.K. Coulombe
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, USA
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11
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Nazeer MA, Karaoglu IC, Ozer O, Albayrak C, Kizilel S. Neovascularization of engineered tissues for clinical translation: Where we are, where we should be? APL Bioeng 2021; 5:021503. [PMID: 33834155 PMCID: PMC8024034 DOI: 10.1063/5.0044027] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/10/2021] [Indexed: 12/11/2022] Open
Abstract
One of the key challenges in engineering three-dimensional tissue constructs is the development of a mature microvascular network capable of supplying sufficient oxygen and nutrients to the tissue. Recent angiogenic therapeutic strategies have focused on vascularization of the constructed tissue, and its integration in vitro; these strategies typically combine regenerative cells, growth factors (GFs) with custom-designed biomaterials. However, the field needs to progress in the clinical translation of tissue engineering strategies. The article first presents a detailed description of the steps in neovascularization and the roles of extracellular matrix elements such as GFs in angiogenesis. It then delves into decellularization, cell, and GF-based strategies employed thus far for therapeutic angiogenesis, with a particularly detailed examination of different methods by which GFs are delivered in biomaterial scaffolds. Finally, interdisciplinary approaches involving advancement in biomaterials science and current state of technological development in fabrication techniques are critically evaluated, and a list of remaining challenges is presented that need to be solved for successful translation to the clinics.
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Affiliation(s)
| | | | - Onur Ozer
- Biomedical Sciences and Engineering, Koç University, Istanbul 34450, Turkey
| | - Cem Albayrak
- Authors to whom correspondence should be addressed: and
| | - Seda Kizilel
- Authors to whom correspondence should be addressed: and
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12
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Yang J, Zhang Y, Qin M, Cheng W, Wang W, Cao Y. Understanding and Regulating Cell-Matrix Interactions Using Hydrogels of Designable Mechanical Properties. J Biomed Nanotechnol 2021; 17:149-168. [PMID: 33785089 DOI: 10.1166/jbn.2021.3026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Similar to natural tissues, hydrogels contain abundant water, so they are considered as promising biomaterials for studying the influence of the mechanical properties of extracellular matrices (ECM) on various cell functions. In recent years, the growing research on cellular mechanical response has revealed that many cell functions, including cell spreading, migration, tumorigenesis and differentiation, are related to the mechanical properties of ECM. Therefore, how cells sense and respond to the extracellular mechanical environment has gained considerable attention. In these studies, hydrogels are widely used as the in vitro model system. Hydrogels of tunable stiffness, viscoelasticity, degradability, plasticity, and dynamical properties have been engineered to reveal how cells respond to specific mechanical features. In this review, we summarize recent process in this research direction and specifically focus on the influence of the mechanical properties of the ECM on cell functions, how cells sense and respond to the extracellular mechanical environment, and approaches to adjusting the stiffness of hydrogels.
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Affiliation(s)
- Jiapeng Yang
- Key Laboratory of Intelligent Optical Sensing and Integration, National Laboratory of Solid State Microstructure, and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Yu Zhang
- Key Laboratory of Intelligent Optical Sensing and Integration, National Laboratory of Solid State Microstructure, and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Meng Qin
- Key Laboratory of Intelligent Optical Sensing and Integration, National Laboratory of Solid State Microstructure, and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Wei Cheng
- Department of Oral Implantology Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Wei Wang
- Key Laboratory of Intelligent Optical Sensing and Integration, National Laboratory of Solid State Microstructure, and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Yi Cao
- Key Laboratory of Intelligent Optical Sensing and Integration, National Laboratory of Solid State Microstructure, and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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13
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Ng HW, Zhang Y, Naffa R, Prabakar S. Monitoring the Degradation of Collagen Hydrogels by Collagenase Clostridium histolyticum. Gels 2020; 6:E46. [PMID: 33260949 PMCID: PMC7709630 DOI: 10.3390/gels6040046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/19/2020] [Accepted: 11/24/2020] [Indexed: 01/03/2023] Open
Abstract
Collagen-based hydrogels are investigated extensively in tissue engineering for their tunable physiochemical properties, biocompatibility and biodegradability. However, the effect of the integrity of the collagen triple helical structure on biodegradability is yet to be studied. In this study, we monitored the degradation of intact collagen (C-coll) and hydrolyzed collagen (D-coll) hydrogels in collagenase Clostridium histolyticum to understand their degradation process. Our results show that when peptides are present on the surface of the fibrils of D-coll hydrogels, cleavage of amide bonds occur at a much higher rate. The fibrillar structure of D-coll hydrogel results in a more pronounced breakdown of the gel network and dissolution of collagen peptides. The results from this work will improve the understanding of enzymatic degradation and the resulting bioabsorption of collagen materials used in drug delivery systems and scaffolds.
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Affiliation(s)
| | | | | | - Sujay Prabakar
- Leather and Shoe Research Association of New Zealand, P.O. Box 8094, Palmerston North 4472, New Zealand; (H.W.N.); (Y.Z.); (R.N.)
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14
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Beyond Growth Factors: Macrophage-Centric Strategies for Angiogenesis. CURRENT PATHOBIOLOGY REPORTS 2020. [DOI: 10.1007/s40139-020-00215-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
AbstractFunctional angiogenesis is a critical therapeutic goal in many pathological conditions. Logically, the use of pro-angiogenic growth factors has been the mainstay approach despite obvious limitations and modest success. Recently, macrophages have been identified as key regulators of the host response to implanted materials. Particularly, our understanding of dynamically plastic macrophage phenotypes, their interactions with biomaterials, and varied roles in different stages of angiogenic processes is evolving rapidly. In this review, we discuss changing perspectives on therapeutic angiogenesis, in relation to implantable materials and macrophage-centric strategies therein. Harnessing the different mechanisms through which the macrophage-driven host response is involved in angiogenesis has great potential for improving clinical outcome.
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15
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16
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Mizuno Y, Taguchi T. A hydrophobic gelatin fiber sheet promotes secretion of endogenous vascular endothelial growth factor and stimulates angiogenesis. RSC Adv 2020; 10:24800-24807. [PMID: 35517459 PMCID: PMC9055140 DOI: 10.1039/d0ra03593a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/20/2020] [Indexed: 01/24/2023] Open
Abstract
In tissue engineering and regenerative medicine, the formation of vascular beds is an effective method to supply oxygen and nutrients to implanted cells or tissues to improve their survival and promote normal cellular functions. Various types of angiogenic materials have been developed by incorporating growth factors, such as vascular endothelial growth factor, in biocompatible materials. However, these exogenous growth factors suffer from instability and inactivation under physiological conditions. In this study, we designed a novel angiogenic electrospun fiber sheet (C16-FS) composed of Alaska pollock-derived gelatin (ApGltn) modified with hexadecyl (C16) groups to induce localized and sustained angiogenesis without growth factors. C16-FS was thermally crosslinked to enhance its stability. We demonstrated that C16-FS swells in phosphate-buffered saline for over 24 h and resists degradation. Laser doppler perfusion imaging showed that C16-FS induced increased blood perfusion when implanted subcutaneously in rats compared with unmodified ApGltn-fiber sheets (Org-FS) and the sham control. Furthermore, angiogenesis was sustained for up to 7 days following implantation. Immunohistochemical studies revealed elevated nuclear factor-κB and CD31 levels around the C16-FS implantation site compared with the Org-FS implantation site and the control incision site. These results demonstrate that C16-FS is a promising angiogenic material to promote the formation of vascular beds for cell and tissue transplantation without the need for growth factors. In vivo long-term growth factor-free angiogenesis by LPS-mimicking C16-modified gelatin based electrospun fiber sheet.![]()
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Affiliation(s)
- Yosuke Mizuno
- Graduate School of Science and Technology
- University of Tsukuba
- Tsukuba
- Japan
- Polymers and Biomaterials Field
| | - Tetsushi Taguchi
- Graduate School of Science and Technology
- University of Tsukuba
- Tsukuba
- Japan
- Polymers and Biomaterials Field
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17
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Amirsadeghi A, Jafari A, Eggermont LJ, Hashemi SS, Bencherif SA, Khorram M. Vascularization strategies for skin tissue engineering. Biomater Sci 2020; 8:4073-4094. [DOI: 10.1039/d0bm00266f] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Lack of proper vascularization after skin trauma causes delayed wound healing. This has sparked the development of various tissue engineering strategies to improve vascularization.
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Affiliation(s)
- Armin Amirsadeghi
- Department of Chemical Engineering
- School of Chemical and Petroleum Engineering
- Shiraz University
- Shiraz 71348-51154
- Iran
| | - Arman Jafari
- Department of Chemical Engineering
- School of Chemical and Petroleum Engineering
- Shiraz University
- Shiraz 71348-51154
- Iran
| | | | - Seyedeh-Sara Hashemi
- Burn & Wound Healing Research Center
- Shiraz University of Medical Science
- Shiraz 71345-1978
- Iran
| | - Sidi A. Bencherif
- Department of Chemical Engineering
- Northeastern University
- Boston
- USA
- Department of Bioengineering
| | - Mohammad Khorram
- Department of Chemical Engineering
- School of Chemical and Petroleum Engineering
- Shiraz University
- Shiraz 71348-51154
- Iran
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18
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Mizuno Y, Taguchi T. Growth factor-free, angiogenic hydrogel based on hydrophobically modified Alaska pollock gelatin. J Tissue Eng Regen Med 2019; 13:2291-2299. [PMID: 31503405 DOI: 10.1002/term.2957] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/11/2019] [Accepted: 09/02/2019] [Indexed: 12/11/2022]
Abstract
Angiogenesis is important for supplying oxygen and nutrients to implanted cells and organs and thereby promoting their survival. However, exogenously administered growth factors such as vascular endothelial growth factor (VEGF) have a short half-life and are unstable under physiological conditions. In the present study, we developed an angiogenesis-inducing hydrogel by modifying Alaska pollock-derived gelatin with a dodecyl group (C12-ApGltn), and demonstrated that it is biodegradable and highly fluid at room temperature (25°C). C12-ApGltn dissolved in phosphate-buffered saline at 20 w/v% formed a self-assembling hydrogel with thixotropic properties that stimulated VEGF secretion by macrophage-like RAW264 cells. Moreover, C12-ApGltn stimulated nuclear factor-κB and VEGF expression when subcutaneously injected into mice and increased the cluster of differentiation 31-positive area compared with injection of unmodified ApGltn and phosphate-buffered saline control in the absence of any growth factors. Hematoxylin and eosin staining confirmed vascular capillaries around the C12-ApGltn injection site. These results demonstrate that C12-ApGltn hydrogel is a promising angiogenic material for clinical applications that can stimulate endogenous VEGF expression without requiring additional growth factors.
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Affiliation(s)
- Yosuke Mizuno
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
| | - Tetsushi Taguchi
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan.,Biomaterials Field, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
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19
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Chowdhury SR, Mh Busra MF, Lokanathan Y, Ng MH, Law JX, Cletus UC, Binti Haji Idrus R. Collagen Type I: A Versatile Biomaterial. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1077:389-414. [PMID: 30357700 DOI: 10.1007/978-981-13-0947-2_21] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Collagen type I is the most abundant matrix protein in the human body and is highly demanded in tissue engineering, regenerative medicine, and pharmaceutical applications. To meet the uprising demand in biomedical applications, collagen type I has been isolated from mammalians (bovine, porcine, goat and rat) and non-mammalians (fish, amphibian, and sea plant) source using various extraction techniques. Recent advancement enables fabrication of collagen scaffolds in multiple forms such as film, sponge, and hydrogel, with or without other biomaterials. The scaffolds are extensively used to develop tissue substitutes in regenerating or repairing diseased or damaged tissues. The 3D scaffolds are also used to develop in vitro model and as a vehicle for delivering drugs or active compounds.
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Affiliation(s)
- Shiplu Roy Chowdhury
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Mohd Fauzi Mh Busra
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Yogeswaran Lokanathan
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Min Hwei Ng
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Jia Xian Law
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Ude Chinedu Cletus
- Bioartificial Organ and Regenerative Medicine Unit, National Defence University of Malaysia, Kuala Lumpur, Malaysia
| | - Ruszymah Binti Haji Idrus
- Department of Physiology, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
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20
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Abstract
The ability to generate new microvessels in desired numbers and at desired locations has been a long-sought goal in vascular medicine, engineering, and biology. Historically, the need to revascularize ischemic tissues nonsurgically (so-called therapeutic vascularization) served as the main driving force for the development of new methods of vascular growth. More recently, vascularization of engineered tissues and the generation of vascularized microphysiological systems have provided additional targets for these methods, and have required adaptation of therapeutic vascularization to biomaterial scaffolds and to microscale devices. Three complementary strategies have been investigated to engineer microvasculature: angiogenesis (the sprouting of existing vessels), vasculogenesis (the coalescence of adult or progenitor cells into vessels), and microfluidics (the vascularization of scaffolds that possess the open geometry of microvascular networks). Over the past several decades, vascularization techniques have grown tremendously in sophistication, from the crude implantation of arteries into myocardial tunnels by Vineberg in the 1940s, to the current use of micropatterning techniques to control the exact shape and placement of vessels within a scaffold. This review provides a broad historical view of methods to engineer the microvasculature, and offers a common framework for organizing and analyzing the numerous studies in this area of tissue engineering and regenerative medicine. © 2019 American Physiological Society. Compr Physiol 9:1155-1212, 2019.
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Affiliation(s)
- Joe Tien
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
- Division of Materials Science and Engineering, Boston University, Brookline, Massachusetts, USA
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21
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Shibata M, Takagi G, Kudo M, Kurita J, Kawamoto Y, Miyagi Y, Kanazashi M, Sakatani T, Naito Z, Tabata Y, Miyamoto M, Nitta T. Enhanced Sternal Healing Through Platelet-Rich Plasma and Biodegradable Gelatin Hydrogel. Tissue Eng Part A 2018; 24:1406-1412. [DOI: 10.1089/ten.tea.2017.0505] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Masafumi Shibata
- Department of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan
| | - Gen Takagi
- Department of Cardiovascular Medicine, Nippon Medical School, Tokyo, Japan
| | - Mitsuhiro Kudo
- Department of Integrated Diagnostic Pathology, Nippon Medical School, Tokyo, Japan
| | - Jiro Kurita
- Department of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan
| | - Yoko Kawamoto
- Department of Integrated Diagnostic Pathology, Nippon Medical School, Tokyo, Japan
| | - Yasuo Miyagi
- Department of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan
| | - Mikimoto Kanazashi
- Kanagawa Dental University, Graduate School of Dentistry, Department of Oral Functional & Restoration, Division of Periodontology, Kanagawa, Japan
| | - Takashi Sakatani
- Department of Diagnostic Pathology, Nippon Medical School Hospital, Tokyo, Japan
| | - Zenya Naito
- Department of Integrated Diagnostic Pathology, Nippon Medical School, Tokyo, Japan
| | - Yasuhiko Tabata
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Masaaki Miyamoto
- Department of Cardiovascular Medicine, Nippon Medical School, Tokyo, Japan
| | - Takashi Nitta
- Department of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan
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22
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Lee J, Lee SH, Lee BK, Park SH, Cho YS, Park Y. Fabrication of Microchannels and Evaluation of Guided Vascularization in Biomimetic Hydrogels. Tissue Eng Regen Med 2018; 15:403-413. [PMID: 30603564 PMCID: PMC6171653 DOI: 10.1007/s13770-018-0130-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/09/2018] [Accepted: 05/29/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The fabrication of microchannels in hydrogel can facilitate the perfusion of nutrients and oxygen, which leads to guidance cues for vasculogenesis. Microchannel patterning in biomimetic hydrogels is a challenging issue for tissue regeneration because of the inherent low formability of hydrogels in a complex configuration. We fabricated microchannels using wire network molding and immobilized the angiogenic factors in the hydrogel and evaluated the vasculogenesis in vitro and in vivo. METHODS Microchannels were fabricated in a hyaluronic acid-based biomimetic hydrogel by using "wire network molding" technology. Substance P was immobilized in acrylated hyaluronic acid for angiogenic cues using Michael type addition reaction. In vitro and in vivo angiogenic activities of hydrogel with microchannels were evaluated. RESULTS In vitro cell culture experiment shows that cell viability in two experimental biomimetic hydrogels (with microchannels and microchannels + SP) was higher than that of a biomimetic hydrogel without microchannels (bulk group). Evaluation on differentiation of human mesenchymal stem cells (hMSCs) in biomimetic hydrogels with fabricated microchannels shows that the differentiation of hMSC into endothelial cells was significantly increased compared with that of the bulk group. In vivo angiogenesis analysis shows that thin blood vessels of approximately 25-30 μm in diameter were observed in the microchannel group and microchannel + SP group, whereas not seen in the bulk group. CONCLUSION The strategy of fabricating microchannels in a biomimetic hydrogel and simultaneously providing a chemical cue for angiogenesis is a promising formula for large-scale tissue regeneration.
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Affiliation(s)
- Jaeyeon Lee
- Department of Biomedical Engineering, College of Medicine, Korea University, 73 Inchon-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea
| | - Se-Hwan Lee
- Department of Mechanical Design Engineering, College of Engineering, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk, 54538 Republic of Korea
| | - Bu-Kyu Lee
- Department of Biomedical Engineering, Asan Medical Center, College of Medicine, Ulsan University, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505 Republic of Korea
- Department of Oral and Maxillofacial Surgery, Asan Medical Center, College of Medicine, Ulsan University, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505 Republic of Korea
| | - Sang-Hyug Park
- Department of Biomedical Engineering, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513 Republic of Korea
| | - Young-Sam Cho
- Department of Mechanical Design Engineering, College of Engineering, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk, 54538 Republic of Korea
| | - Yongdoo Park
- Department of Biomedical Engineering, College of Medicine, Korea University, 73 Inchon-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea
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23
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Cheng B, Yan Y, Qi J, Deng L, Shao ZW, Zhang KQ, Li B, Sun Z, Li X. Cooperative Assembly of a Peptide Gelator and Silk Fibroin Afford an Injectable Hydrogel for Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12474-12484. [PMID: 29584396 DOI: 10.1021/acsami.8b01725] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Silk fibroin (SF) from Bombyx mori has received increasing interest in biomedical fields, because of its slow biodegradability, good biocompatibility, and low immunogenicity. Although SF-based hydrogels have been studied intensively as a potential matrix for tissue engineering, weak gelation performance and low mechanical strength are major limitations that hamper their widespread applicability. Therefore, searching for new strategies to improve the SF gelation property is highly desirable in tissue engineering research. Herein, we report a facile approach to induce rapid gelation of SF by a small peptide gelator (e.g., NapFF). Following the simple mixing of SF and NapFF in water, a stable hydrogel of SF was obtained in a short time period at physiological pH, and the minimum gelation concentration of SF can reach as low as 0.1%. In this process of gelation, NapFF not only can behave itself as a gelator for supramolecular self-assembly, but also can trigger the conformational transition of the SF molecule from random coil to β-sheet structure via hydrophobic and hydrogen-bonding interactions. More importantly, for the generation of a scaffold with favorable cell-surface interactions, a new peptide gelator (NapFFRGD) with Arg-Gly-Asp (RGD) domain was applied to functionalize SF hydrogel with improved bioactivity for cell adhesion and growth. Following encapsulating the vascular endothelial growth factor (VEGF), the SF gel was subcutaneously injected in mice, and served as an effective matrix to trigger the generation of new blood capillaries in vivo.
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Affiliation(s)
- Baochang Cheng
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Yufei Yan
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital , Shanghai Jiaotong University, School of Medicine , Shanghai 200025 , China
| | - Jingjing Qi
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Lianfu Deng
- Shanghai Key Laboratory for Bone and Joint Diseases, Shanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital , Shanghai Jiaotong University, School of Medicine , Shanghai 200025 , China
| | - Zeng-Wu Shao
- Department of Orthopaedics, Union Hospital, Tongji Medical School , Huazhong University of Science and Technology , Wuhan 430022 , China
| | - Ke-Qin Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering , Soochow University , Suzhou 215123 , China
| | - Bin Li
- Department of Orthopaedics, The First Affiliated Hospital, Orthopaedic Institute , Soochow University , Suzhou 215006 , China
| | - Ziling Sun
- School of Biology and Basic Medical Science , Soochow University , Suzhou 215123 , China
| | - Xinming Li
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
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24
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Biomaterial Scaffolds in Regenerative Therapy of the Central Nervous System. BIOMED RESEARCH INTERNATIONAL 2018; 2018:7848901. [PMID: 29805977 PMCID: PMC5899851 DOI: 10.1155/2018/7848901] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 02/18/2018] [Accepted: 02/21/2018] [Indexed: 02/08/2023]
Abstract
The central nervous system (CNS) is the most important section of the nervous system as it regulates the function of various organs. Injury to the CNS causes impairment of neurological functions in corresponding sites and further leads to long-term patient disability. CNS regeneration is difficult because of its poor response to treatment and, to date, no effective therapies have been found to rectify CNS injuries. Biomaterial scaffolds have been applied with promising results in regeneration medicine. They also show great potential in CNS regeneration for tissue repair and functional recovery. Biomaterial scaffolds are applied in CNS regeneration predominantly as hydrogels and biodegradable scaffolds. They can act as cellular supportive scaffolds to facilitate cell infiltration and proliferation. They can also be combined with cell therapy to repair CNS injury. This review discusses the categories and progression of the biomaterial scaffolds that are applied in CNS regeneration.
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25
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Gaudiello E, Melly L, Cerino G, Boccardo S, Jalili-Firoozinezhad S, Xu L, Eckstein F, Martin I, Kaufmann BA, Banfi A, Marsano A. Scaffold Composition Determines the Angiogenic Outcome of Cell-Based Vascular Endothelial Growth Factor Expression by Modulating Its Microenvironmental Distribution. Adv Healthc Mater 2017; 6. [PMID: 28994225 DOI: 10.1002/adhm.201700600] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 08/25/2017] [Indexed: 01/22/2023]
Abstract
Delivery of genetically modified cells overexpressing Vascular Endothelial Growth Factor (VEGF) is a promising approach to induce therapeutic angiogenesis in ischemic tissues. The effect of the protein is strictly modulated by its interaction with the components of the extracellular matrix. Its therapeutic potential depends on a sustained but controlled release at the microenvironmental level in order to avoid the formation of abnormal blood vessels. In this study, it is hypothesized that the composition of the scaffold plays a key role in modulating the binding, hence the therapeutic effect, of the VEGF released by 3D-cell constructs. It is found that collagen sponges, which poorly bind VEGF, prevent the formation of localized hot spots of excessive concentration, therefore, precluding the development of aberrant angiogenesis despite uncontrolled expression by a genetically engineered population of adipose tissue-derived stromal cells. On the contrary, after seeding on VEGF-binding egg-white scaffolds, the same cell population caused aberrantly enlarged vascular structures after 14 d. Collagen-based engineered tissues also induced a safe and efficient angiogenesis in both the patch itself and the underlying myocardium in rat models. These findings open new perspectives on the control and the delivery of proangiogenic stimuli, and are fundamental for the vascularization of engineered tissues/organs.
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Affiliation(s)
- Emanuele Gaudiello
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Ludovic Melly
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Giulia Cerino
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Stefano Boccardo
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Sasan Jalili-Firoozinezhad
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Lifen Xu
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
| | - Friedrich Eckstein
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Ivan Martin
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Beat A. Kaufmann
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
| | - Andrea Banfi
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
| | - Anna Marsano
- Department of Biomedicine; University of Basel; Hebelstrasse 20 CH-4031 Basel Switzerland
- Department of Surgery; University Hospital Basel; Spitalstrasse 21 CH-4031 Basel Switzerland
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26
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Nguyen LH, Gao M, Lin J, Wu W, Wang J, Chew SY. Three-dimensional aligned nanofibers-hydrogel scaffold for controlled non-viral drug/gene delivery to direct axon regeneration in spinal cord injury treatment. Sci Rep 2017; 7:42212. [PMID: 28169354 PMCID: PMC5294639 DOI: 10.1038/srep42212] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 01/06/2017] [Indexed: 01/07/2023] Open
Abstract
Spinal cord injuries (SCI) often lead to persistent neurological dysfunction due to failure in axon regeneration. Unfortunately, currently established treatments, such as direct drug administration, do not effectively treat SCI due to rapid drug clearance from our bodies. Here, we introduce a three-dimensional aligned nanofibers-hydrogel scaffold as a bio-functionalized platform to provide sustained non-viral delivery of proteins and nucleic acid therapeutics (small non-coding RNAs), along with synergistic contact guidance for nerve injury treatment. A hemi-incision model at cervical level 5 in the rat spinal cord was chosen to evaluate the efficacy of this scaffold design. Specifically, aligned axon regeneration was observed as early as one week post-injury. In addition, no excessive inflammatory response and scar tissue formation was triggered. Taken together, our results demonstrate the potential of our scaffold for neural tissue engineering applications.
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Affiliation(s)
- Lan Huong Nguyen
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Mingyong Gao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
- Department of Spine Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Junquan Lin
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Wutian Wu
- School of Biomedical Sciences, The University of Hong Kong Li Ka Shing Faculty of Medicine, Pokfulam, Hong Kong SAR, China
- Research Center of Reproduction, Development and Growth, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- State Key Laboratory of Brain and Cognitive Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou 510632, PR China
| | - Jun Wang
- The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science & Technology of China, Hefei, Anhui 230027, PR China
| | - Sing Yian Chew
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 308232, Singapore
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27
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Silva JM, Reis RL, Mano JF. Biomimetic Extracellular Environment Based on Natural Origin Polyelectrolyte Multilayers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4308-42. [PMID: 27435905 DOI: 10.1002/smll.201601355] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/15/2016] [Indexed: 05/23/2023]
Abstract
Surface modification of biomaterials is a well-known approach to enable an adequate biointerface between the implant and the surrounding tissue, dictating the initial acceptance or rejection of the implantable device. Since its discovery in early 1990s layer-by-layer (LbL) approaches have become a popular and attractive technique to functionalize the biomaterials surface and also engineering various types of objects such as capsules, hollow tubes, and freestanding membranes in a controllable and versatile manner. Such versatility enables the incorporation of different nanostructured building blocks, including natural biopolymers, which appear as promising biomimetic multilayered systems due to their similarity to human tissues. In this review, the potential of natural origin polymer-based multilayers is highlighted in hopes of a better understanding of the mechanisms behind its use as building blocks of LbL assembly. A deep overview on the recent progresses achieved in the design, fabrication, and applications of natural origin multilayered films is provided. Such films may lead to novel biomimetic approaches for various biomedical applications, such as tissue engineering, regenerative medicine, implantable devices, cell-based biosensors, diagnostic systems, and basic cell biology.
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Affiliation(s)
- Joana M Silva
- 3Bs Research Group-Biomaterials Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
| | - Rui L Reis
- 3Bs Research Group-Biomaterials Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
| | - João F Mano
- 3Bs Research Group-Biomaterials Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
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Lee H, Chung HJ, Park TG. Perspectives On: Local and Sustained Delivery of Angiogenic Growth Factors. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911506073363] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review emphasizes the role of angiogenesis in tissue engineering, introduces various angiogenic growth factors, and highlights current status of delivery systems for angiogenic growth factors using natural and synthetic biomaterials. A short overview of angiogenic growth factors is presented, followed by the introduction of emerging strategies for designing smart delivery carriers.
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Affiliation(s)
- Hyukjin Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
| | - Hyun Jung Chung
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
| | - Tae Gwan Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea,
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Zhang X, Battig MR, Chen N, Gaddes ER, Duncan KL, Wang Y. Chimeric Aptamer-Gelatin Hydrogels as an Extracellular Matrix Mimic for Loading Cells and Growth Factors. Biomacromolecules 2016; 17:778-87. [PMID: 26791559 DOI: 10.1021/acs.biomac.5b01511] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
It is important to synthesize materials to recapitulate critical functions of biological systems for a variety of applications such as tissue engineering and regenerative medicine. The purpose of this study was to synthesize a chimeric hydrogel as a promising extracellular matrix (ECM) mimic using gelatin, a nucleic acid aptamer, and polyethylene glycol. This hydrogel had a macroporous structure that was highly permeable for fast molecular transport. Despite its high permeability, it could strongly sequester and sustainably release growth factors with high bioactivity. Notably, growth factors retained in the hydrogel could maintain ∼ 50% bioactivity during a 14-day release test. It also provided cells with effective binding sites, which led to high efficiency of cell loading into the macroporous hydrogel matrix. When cells and growth factors were coloaded into the chimeric hydrogel, living cells could still be observed by day 14 in a static serum-reduced culture condition. Thus, this chimeric aptamer-gelatin hydrogel constitutes a promising biomolecular ECM mimic for loading cells and growth factors.
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Affiliation(s)
- Xiaolong Zhang
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Mark R Battig
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Niancao Chen
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Erin R Gaddes
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Katelyn L Duncan
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Yong Wang
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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Kapoor S, Kundu SC. Silk protein-based hydrogels: Promising advanced materials for biomedical applications. Acta Biomater 2016; 31:17-32. [PMID: 26602821 DOI: 10.1016/j.actbio.2015.11.034] [Citation(s) in RCA: 264] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 11/08/2015] [Accepted: 11/17/2015] [Indexed: 01/20/2023]
Abstract
Hydrogels are a class of advanced material forms that closely mimic properties of the soft biological tissues. Several polymers have been explored for preparing hydrogels with structural and functional features resembling that of the extracellular matrix. Favourable material properties, biocompatibility and easy processing of silk protein fibers into several forms make it a suitable material for biomedical applications. Hydrogels made from silk proteins have shown a potential in overcoming limitations of hydrogels prepared from conventional polymers. A great deal of effort has been made to control the properties and to integrate novel topographical and functional characteristics in the hydrogel composed from silk proteins. This review provides overview of the advances in silk protein-based hydrogels with a primary emphasis on hydrogels of fibroin. It describes the approaches used to fabricate fibroin hydrogels. Attempts to improve the existing properties or to incorporate new features in the hydrogels by making composites and by improving fibroin properties by genetic engineering approaches are also described. Applications of the fibroin hydrogels in the realms of tissue engineering and controlled release are reviewed and their future potentials are discussed. STATEMENT OF SIGNIFICANCE This review describes the potentiality of silk fibroin hydrogel. Silk Fibroin has been widely recognized as an interesting biomaterial. Due to its properties including high mechanical strength and excellent biocompatibility, it has gained wide attention. Several groups are exploring silk-based materials including films, hydrogels, nanofibers and nanoparticles for different biomedical applications. Although there is a good amount of literature available on general properties and applications of silk based biomaterials, there is an inadequacy of extensive review articles that specifically focus on silk based hydrogels. Silk-based hydrogels have a strong potential to be utilized in biomedical applications. Our work is an effort to highlight the research that has been done in the area of silk-based hydrogels. It aims to provide an overview of the advances that have been made and the future course available. It will provide an overview of the silk-based hydrogels as well as may direct the readers to the specific areas of application.
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Van Hove AH, Antonienko E, Burke K, Brown E, Benoit DS. Temporally tunable, enzymatically responsive delivery of proangiogenic peptides from poly(ethylene glycol) hydrogels. Adv Healthc Mater 2015; 4:2002-11. [PMID: 26149620 PMCID: PMC4696931 DOI: 10.1002/adhm.201500304] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/10/2015] [Indexed: 12/22/2022]
Abstract
Proangiogenic drugs hold great potential to promote reperfusion of ischemic tissues and in tissue engineering applications, but efficacy is limited by poor targeting and short half-lives. Methods to control release duration or provide enzymatically responsive drug delivery have independently improved drug efficacy. However, no material has been developed to temporally control the rate of enzymatically responsive drug release. To address this void, hydrogels are developed to provide sustained, tunable release of Qk, a proangiogenic peptide mimic of vascular endothelial growth factor, via tissue-specific enzymatic activity. After confirmation that sustained delivery of Qk is necessary for proangiogenic effects, a variety of previously identified matrix metalloproteinase (MMP)-degradable linkers are used to tether Qk to hydrogels. Of these, three (IPES↓LRAG, GPQG↓IWGQ, and VPLS↓LYSG) show MMP-responsive peptide release. These linkers provide tunable Qk release kinetics, with rates ranging from 1.64 to 19.9 × 10(-3) h(-1) in vitro and 4.82 to 8.94 × 10(-3) h(-1) in vivo. While Qk is confirmed to be bioactive as released, hydrogels releasing Qk fail to induce significant vascularization in vivo after one week, likely due to the use of nonenzymatically degradable hydrogels. While Qk is the focus of this study, the approach could easily be adapted to control the delivery of a variety of therapeutic molecules.
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Affiliation(s)
- Amy H. Van Hove
- Department of Biomedical Engineering, 207 Robert B. Goergen Hall, University of Rochester, Rochester, NY 14627, USA
| | - Erin Antonienko
- Department of Biomedical Engineering, 207 Robert B. Goergen Hall, University of Rochester, Rochester, NY 14627, USA
| | - Kathleen Burke
- Department of Biomedical Engineering, 207 Robert B. Goergen Hall, University of Rochester, Rochester, NY 14627, USA
| | - Edward Brown
- Department of Biomedical Engineering, 207 Robert B. Goergen Hall, University of Rochester, Rochester, NY 14627, USA
- Department of Neurobiology and Anatomy, University of Rochester, 601 Elmwood Ave, Rochester, NY, 14642, USA
| | - Danielle S.W. Benoit
- Department of Biomedical Engineering, 207 Robert B. Goergen Hall, University of Rochester, Rochester, NY 14627, USA
- Department of Biomedical Genetics, 601 Elmwood Ave, University of Rochester, Rochester, NY 14642, USA
- Department of Chemical Engineering, 206 Gavett Hall, University of Rochester, Rochester, NY 14627 USA
- Center for Musculoskeletal Research, 601 Elmwood Ave, University of Rochester Medical Center, Rochester, NY 14642, USA
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Enzymatically-responsive pro-angiogenic peptide-releasing poly(ethylene glycol) hydrogels promote vascularization in vivo. J Control Release 2015; 217:191-201. [PMID: 26365781 DOI: 10.1016/j.jconrel.2015.09.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 09/01/2015] [Accepted: 09/05/2015] [Indexed: 01/09/2023]
Abstract
Therapeutic angiogenesis holds great potential for a myriad of tissue engineering and regenerative medicine approaches. While a number of peptides have been identified with pro-angiogenic behaviors, therapeutic efficacy is limited by poor tissue localization and persistence. Therefore, poly(ethylene glycol) hydrogels providing sustained, enzymatically-responsive peptide release were exploited for peptide delivery. Two pro-angiogenic peptide drugs, SPARC113 and SPARC118, from the Secreted Protein Acidic and Rich in Cysteine, were incorporated into hydrogels as crosslinking peptides flanked by matrix metalloproteinase (MMP) degradable substrates. In vitro testing confirmed peptide drug bioactivity requires sustained delivery. Furthermore, peptides retain bioactivity with residual MMP substrates present after hydrogel release. Incorporation into hydrogels achieved enzymatically-responsive bulk degradation, with peptide release in close agreement with hydrogel mass loss and released peptides retaining bioactivity. Interestingly, SPARC113 and SPARC118-releasing hydrogels had significantly different degradation time constants in vitro (1.16 and 8.77×10(-2) h(-1), respectively), despite identical MMP degradable substrates. However, upon subcutaneous implantation, both SPARC113 and SPARC118 hydrogels exhibited similar degradation constants of ~1.45×10(-2) h(-1), and resulted in significant ~1.65-fold increases in angiogenesis in vivo compared to controls. Thus, these hydrogels represent a promising pro-angiogenic approach for applications such as tissue engineering and ischemic tissue disorders.
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Clegg LW, Mac Gabhann F. Site-Specific Phosphorylation of VEGFR2 Is Mediated by Receptor Trafficking: Insights from a Computational Model. PLoS Comput Biol 2015; 11:e1004158. [PMID: 26067165 PMCID: PMC4466579 DOI: 10.1371/journal.pcbi.1004158] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 01/25/2015] [Indexed: 02/05/2023] Open
Abstract
Matrix-binding isoforms and non-matrix-binding isoforms of vascular endothelial growth factor (VEGF) are both capable of stimulating vascular remodeling, but the resulting blood vessel networks are structurally and functionally different. Here, we develop and validate a computational model of the binding of soluble and immobilized ligands to VEGF receptor 2 (VEGFR2), the endosomal trafficking of VEGFR2, and site-specific VEGFR2 tyrosine phosphorylation to study differences in induced signaling between these VEGF isoforms. In capturing essential features of VEGFR2 signaling and trafficking, our model suggests that VEGFR2 trafficking parameters are largely consistent across multiple endothelial cell lines. Simulations demonstrate distinct localization of VEGFR2 phosphorylated on Y1175 and Y1214. This is the first model to clearly show that differences in site-specific VEGFR2 activation when stimulated with immobilized VEGF compared to soluble VEGF can be accounted for by altered trafficking of VEGFR2 without an intrinsic difference in receptor activation. The model predicts that Neuropilin-1 can induce differences in the surface-to-internal distribution of VEGFR2. Simulations also show that ligated VEGFR2 and phosphorylated VEGFR2 levels diverge over time following stimulation. Using this model, we identify multiple key levers that alter how VEGF binding to VEGFR2 results in different coordinated patterns of multiple downstream signaling pathways. Specifically, simulations predict that VEGF immobilization, interactions with Neuropilin-1, perturbations of VEGFR2 trafficking, and changes in expression or activity of phosphatases acting on VEGFR2 all affect the magnitude, duration, and relative strength of VEGFR2 phosphorylation on tyrosines 1175 and 1214, and they do so predictably within our single consistent model framework. Vascular endothelial growth factor (VEGF) is an important regulator of blood vessel growth. To date, therapies attempting to harness the VEGF system to promote blood vessel growth (e.g. for wound healing or ischemic disease) have achieved only limited success. To improve VEGF-based therapies, we need to better understand how VEGF promotes development of functional blood vessels. We have developed a computational model of VEGF binding to the receptor VEGFR2, trafficking of VEGFR2 through endosomal compartments in the cell, and activation of VEGFR2 on several tyrosine residues. The pattern of tyrosines activated on VEGFR2 influences cell behavior, promoting cell survival, proliferation, or migration. The combination of these cues influences the diameter of vessels, degree of branching, and leakiness of the resultant vessel network. Our model shows that changes in VEGFR2 trafficking as a result of VEGF immobilization to the extracellular matrix are sufficient to describe observed changes in the pattern of VEGFR2 activation compared to stimulation with purely soluble VEGF. This model can be used to predict how VEGF immobilization, interactions with co-receptors or proteins that deactivate VEGFR2, and changes to VEGFR2 trafficking can be tuned to promote development of functional blood vessel networks for tissue engineering applications.
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Affiliation(s)
- Lindsay Wendel Clegg
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America
- * E-mail:
| | - Feilim Mac Gabhann
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America
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Fu A, Gwon K, Kim M, Tae G, Kornfield JA. Visible-Light-Initiated Thiol–Acrylate Photopolymerization of Heparin-Based Hydrogels. Biomacromolecules 2015; 16:497-506. [DOI: 10.1021/bm501543a] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Amy Fu
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
| | - Kihak Gwon
- School
of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea
| | - Mihye Kim
- School
of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea
| | - Giyoong Tae
- School
of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea
| | - Julia A. Kornfield
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
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Choi J, Park H, Kim T, Jeong Y, Oh MH, Hyeon T, Gilad AA, Lee KH. Engineered collagen hydrogels for the sustained release of biomolecules and imaging agents: promoting the growth of human gingival cells. Int J Nanomedicine 2014; 9:5189-201. [PMID: 25429215 PMCID: PMC4243508 DOI: 10.2147/ijn.s71304] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
We present here the in vitro release profiles of either fluorescently labeled biomolecules or computed tomography contrast nanoagents from engineered collagen hydrogels under physiological conditions. The collagen constructs were designed as potential biocompatible inserts into wounded human gingiva. The collagen hydrogels were fabricated under a variety of conditions in order to optimize the release profile of biomolecules and nanoparticles for the desired duration and amount. The collagen constructs containing biomolecules/nanoconstructs were incubated under physiological conditions (ie, 37°C and 5% CO2) for 24 hours, and the release profile was tuned from 20% to 70% of initially loaded materials by varying the gelation conditions of the collagen constructs. The amounts of released biomolecules and nanoparticles were quantified respectively by measuring the intensity of fluorescence and X-ray scattering. The collagen hydrogel we fabricated may serve as an efficient platform for the controlled release of biomolecules and imaging agents in human gingiva to facilitate the regeneration of oral tissues.
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Affiliation(s)
- Jonghoon Choi
- Department of Bionanotechnology, Hanyang University, Seoul Campus, Seoul, Korea ; Department of Bionanoengineering, Hanyang University, ERICA Campus, Ansan, Korea
| | - Hoyoung Park
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Korea
| | - Taeho Kim
- Center for Nanoparticle Research, Institute for Basic Science, Seoul, Korea ; School of Chemical and Biological Engineering, Seoul National University, Seoul, Korea
| | - Yoon Jeong
- Department of Bionanotechnology, Hanyang University, Seoul Campus, Seoul, Korea ; Department of Bionanoengineering, Hanyang University, ERICA Campus, Ansan, Korea
| | - Myoung Hwan Oh
- Center for Nanoparticle Research, Institute for Basic Science, Seoul, Korea ; School of Chemical and Biological Engineering, Seoul National University, Seoul, Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science, Seoul, Korea ; School of Chemical and Biological Engineering, Seoul National University, Seoul, Korea
| | - Assaf A Gilad
- Department of Radiology and Radiological Health, Johns Hopkins University School of Medicine, Baltimore, MD, USA ; Institute for Cell Engineering, Baltimore, MD, USA
| | - Kwan Hyi Lee
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Korea
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Kikkawa YS, Nakagawa T, Ying L, Tabata Y, Tsubouchi H, Ido A, Ito J. Growth factor-eluting cochlear implant electrode: impact on residual auditory function, insertional trauma, and fibrosis. J Transl Med 2014; 12:280. [PMID: 25280483 PMCID: PMC4189752 DOI: 10.1186/s12967-014-0280-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 09/24/2014] [Indexed: 11/10/2022] Open
Abstract
Background A cochlear implant (CI) is an artificial hearing device that can replace a damaged cochlea. The present study examined the use of growth factor-eluting gelatin hydrogel coatings on the electrodes to minimize inner ear trauma during electrode insertion. Insulin-like growth factor 1 (IGF1) and/or hepatocyte growth factor (HGF) were chosen as the agents to be administered. Methods Silicone CI electrode analogs were prepared and coated with gelatin hydrogels. Adsorption/release profile of the hydrogel was measured using 125I-radiolabeled IGF. Hydrogel-coated electrodes were absorbed with IGF1, HGF, IGF1 plus HGF, or saline (control) and implanted into the basal turns of guinea pig cochleae (n = 5). Auditory sensitivity was determined pre-operatively, immediately after, and 3, 7, 14, 21, and 28 days post-operatively by using auditory brainstem response (ABR; 4–16 kHz). In addition, histological analysis was performed and auditory hair cell (HC) survival, spiral ganglion neuron (SGN) densities, and fibrous tissue thickness were measured. Results Compared to non-coated arrays, hydrogel-coated electrodes adsorbed significantly greater amounts of IGF1 and continuously released it for 48 h. Residual hearing measured by ABR thresholds after surgery were elevated by 50–70 dB in all of the electrode-implanted animals, and was maximal immediately after operation. Thresholds were less elevated after hydrogel treatment, and the hearing protection improved when IGF1 or HGF was applied. Histopathologically, hair cell survival, spiral ganglion cell survival, and fibrous tissue thickness were not different between the experimental groups. No serious adverse events were observed during the 4-week observation period. Conclusions Our findings provide the first evidence that hydrogel-coated, growth factor-releasing CI electrodes could attenuate insertional trauma and promote recovery from it, suggesting that this combination might be a new drug delivery strategy not only in cochlear implantation but also in treating clinical conditions characterized by inner ear damage.
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Vasita R, Katti DS. Growth factor-delivery systems for tissue engineering: a materials perspective. Expert Rev Med Devices 2014; 3:29-47. [PMID: 16359251 DOI: 10.1586/17434440.3.1.29] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The transplantation of organs, their surgical reconstruction or implantation of synthetic devices that can perform the function of organs, are the currently available methods for treating loss of tissue/organs in humans. However, the limitations associated with these techniques have led to the development of tissue engineering. One of the primary goals of tissue engineering is to provide growth factor delivery systems that can induce desired cell responses both in vitro and in vivo, in order to cause accelerated tissue regeneration. To make growth factors a more therapeutically viable alternative for the treatment of chronic degenerative diseases, a wide range of natural and synthetic materials have been employed as vehicles for their controlled delivery. The choice of material and design of the carrier device influence the mode of immobilization of growth factors on the scaffolds and their local/systemic administration. From a tissue engineer's perspective, materials could be used for designing scaffolds as well as for delivering single or multiple growth factors. Therefore, this review discusses growth factor delivery systems, with particular reference to carrier-based growth factor delivery systems with a focus on materials.
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Affiliation(s)
- Rajesh Vasita
- Indian Institute of Technology - Kanpur, Department of Biological Sciences and Bioengineering, Kanpur-208016, Uttar-Pradesh, India.
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Engineering strategies to control vascular endothelial growth factor stability and levels in a collagen matrix for angiogenesis: the role of heparin sodium salt and the PLGA-based microsphere approach. Acta Biomater 2013; 9:7389-98. [PMID: 23523534 DOI: 10.1016/j.actbio.2013.03.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 03/12/2013] [Accepted: 03/13/2013] [Indexed: 02/02/2023]
Abstract
New vessel formation is the result of the complex orchestration of various elements, such as cells, signalling molecules and extracellular matrix (ECM). In order to establish the suitable conditions for an effective cell response, the influence of vascular endothelial growth factor (VEGF) complexation with heparin sodium salt (Hp) on its pro-angiogenic activity has been evaluated by an in vitro capillary-like tube formation assay. VEGF with or without Hp was embedded into collagen gels, and the activated matrices were characterized in terms of VEGF activity and release kinetics. Taking into account the crucial role of Hp in VEGF stability and activity, VEGF/Hp complex was then encapsulated into microspheres based on poly(lactide-co-glycolide) (PLGA), and microsphere properties, VEGF/Hp release kinetics and VEGF in vitro activity over time were evaluated. Integrated microsphere/collagen matrices were developed in order to provide a continuous release of active VEGF/Hp inside the matrix but also a VEGF gradient at the boundary, which is an essential condition for endothelial cell attraction and scaffold invasion. The results confirmed a strong influence of Hp on VEGF configuration and, consequently, on its activity, while the encapsulation of VEGF/Hp complex in PLGA-microspheres guaranteed a sustained release of active VEGF for more than 30days. This paper confirms the importance of VEGF stability and signal presentation to cells for an effective proangiogenic activity and highlights how the combination of two stabilizing approaches, namely VEGF/Hp complexation and entrapment within PLGA-based microspheres, may be a very effective strategy to achieve this goal.
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Formiga FR, Tamayo E, Simón-Yarza T, Pelacho B, Prósper F, Blanco-Prieto MJ. Angiogenic therapy for cardiac repair based on protein delivery systems. Heart Fail Rev 2013; 17:449-73. [PMID: 21979836 DOI: 10.1007/s10741-011-9285-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cardiovascular diseases remain the first cause of morbidity and mortality in the developed countries and are a major problem not only in the western nations but also in developing countries. Current standard approaches for treating patients with ischemic heart disease include angioplasty or bypass surgery. However, a large number of patients cannot be treated using these procedures. Novel curative approaches under investigation include gene, cell, and protein therapy. This review focuses on potential growth factors for cardiac repair. The role of these growth factors in the angiogenic process and the therapeutic implications are reviewed. Issues including aspects of growth factor delivery are presented in relation to protein stability, dosage, routes, and safety matters. Finally, different approaches for controlled growth factor delivery are discussed as novel protein delivery platforms for cardiac regeneration.
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Affiliation(s)
- F R Formiga
- Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Navarra, Pamplona, Spain
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40
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Stähli C, Muja N, Nazhat SN. Controlled Copper Ion Release from Phosphate-Based Glasses Improves Human Umbilical Vein Endothelial Cell Survival in a Reduced Nutrient Environment. Tissue Eng Part A 2013; 19:548-57. [DOI: 10.1089/ten.tea.2012.0223] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Christoph Stähli
- Department of Mining and Materials Engineering, McGill University, Montreal, Canada
| | - Naser Muja
- Department of Mining and Materials Engineering, McGill University, Montreal, Canada
| | - Showan N. Nazhat
- Department of Mining and Materials Engineering, McGill University, Montreal, Canada
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Oh HH, Lu H, Kawazoe N, Chen G. Spatially guided angiogenesis by three-dimensional collagen scaffolds micropatterned with vascular endothelial growth factor. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:2185-95. [PMID: 22127352 DOI: 10.1163/092050611x611693] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Successful regeneration of large and highly functionalized tissue and organs depends on the ability to guide blood vessel formation with three-dimensional scaffolds. Angiogenic growth factors have the potential to stimulate blood vessels in scaffolds. However, simply incorporating angiogenic growth factors in a random fashion may lead to uncontrolled blood vessel generation, which ultimately results in poor blood vessel network function and uneven growth of engineered tissue. To control and guide the formation of a blood vessel network in porous scaffolds, we prepared collagen sponges with micropatterned vascular endothelial growth factor (VEGF). VEGF was micropatterned in three-dimensional collagen sponges using micropatterned collagen/VEGF ice lines, which were prepared by a dispersing machine. The VEGF-micropatterned collagen sponges were implanted subcutaneously in nude mice. Following 6 weeks of implantation, the VEGF-micropatterned collagen sponges induced the formation of micropatterned blood vessel networks. More blood vessels were observed in the regions in which VEGF was immobilized than those without VEGF. The micropattern of VEGF determined the micropattern of the regenerated blood vessel network. The spatial immobilization of VEGF in three-dimensional porous scaffolds may be useful to stimulate guided blood vessel formation in a variety of tissue-engineering applications.
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Affiliation(s)
- Hwan Hee Oh
- a Tissue Regeneration Materials Unit, International Center for Materials Nanoarchitectonics, National Institute for Materials Science , 1-1 Namiki , Tsukuba , Ibaraki , 305-0044 , Japan
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Takaoka R, Hikasa Y, Tabata Y. Vascularization Around Poly(tetrafluoroethylene) Mesh with Coating of Gelatin Hydrogel Incorporating Basic Fibroblast Growth Factor. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:1483-94. [DOI: 10.1163/092050609x12457419038465] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Ryohei Takaoka
- a Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan; Department of Veterinary Internal Medicine, Faculty of Agriculture, Tottori University, Minami 4-101, Koyama-cho, Tottori 680-8553, Japan
| | - Yoshiaki Hikasa
- b Department of Veterinary Internal Medicine, Faculty of Agriculture, Tottori University, Minami 4-101, Koyama-cho, Tottori 680-8553, Japan
| | - Yasuhiko Tabata
- c Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
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Affiliation(s)
- Tina Vermonden
- Department of Pharmaceutics, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
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Tengood JE, Maskarinec D, Ridenour R, Little SR. A mathematical model for release of biologics from porous hollow fibers. J Biomed Mater Res A 2012; 100:817-26. [PMID: 22275332 DOI: 10.1002/jbm.a.34013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 11/14/2011] [Indexed: 11/12/2022]
Abstract
The application of porous hollow fibers has recently been extended to the controlled release of biologics such as protein growth factors and lipid angiogenesis promoters. Release of these materials tends to occur more rapidly than would be predicted by conventional diffusion-based models of controlled release. Analysis of other modalities of transport as well as structural analysis of the controlled release system itself was performed to provide insight into the observed controlled release behavior from such systems. Specifically, it was discovered that osmotic-driven processes play a significant role in controlled release of proteins including vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF). It was also found that the fiber pore microstructure and (more importantly) macrostructure influences release behavior. Model-guided design was implemented to adjust the physical properties of the fiber wall, leading to a release system that is better able to sustain the delivery of VEGF. This model may be used to more easily achieve a desired complex release behavior when used in combination with external regulation of the reservoir.
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Affiliation(s)
- Jillian E Tengood
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Kurita J, Miyamoto M, Ishii Y, Aoyama J, Takagi G, Naito Z, Tabata Y, Ochi M, Shimizu K. Enhanced Vascularization by Controlled Release of Platelet-Rich Plasma Impregnated in Biodegradable Gelatin Hydrogel. Ann Thorac Surg 2011; 92:837-44; discussion 844. [DOI: 10.1016/j.athoracsur.2011.04.084] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Revised: 04/16/2011] [Accepted: 04/22/2011] [Indexed: 10/17/2022]
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Dawood AF, Lotfi P, Dash SN, Kona SK, Nguyen KT, Romero-Ortega MI. VEGF Release in Multiluminal Hydrogels Directs Angiogenesis from Adult Vasculature In Vitro. Cardiovasc Eng Technol 2011. [DOI: 10.1007/s13239-011-0048-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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47
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Wang X, Mäkitie AA, Paloheimo KS, Tuomi J, Paloheimo M, Sui S, Zhang Q. Characterization of a PLGA sandwiched cell/fibrin tubular construct and induction of the adipose derived stem cells into smooth muscle cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2010.10.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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He Q, Zhao Y, Chen B, Xiao Z, Zhang J, Chen L, Chen W, Deng F, Dai J. Improved cellularization and angiogenesis using collagen scaffolds chemically conjugated with vascular endothelial growth factor. Acta Biomater 2011; 7:1084-93. [PMID: 20977949 DOI: 10.1016/j.actbio.2010.10.022] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 09/27/2010] [Accepted: 10/20/2010] [Indexed: 10/18/2022]
Abstract
Much research has focused on developing vascular endothelial growth factor (VEGF) delivery systems to enhance angiogenesis in wound repair and in tissue engineering. Collagen can be used as a delivery system because of its biocompatibility, but its fast degradation rate and limited affinity with growth factors are disadvantageous for maintaining a sufficient growth factor concentration at injury sites. To enhance VEGF binding to collagen scaffolds and reduce the collagen degradation rate we found a simple way to modify porous collagen scaffolds by chemical addition of sulfhydryl groups, which then allow both cross-linking of the collagen fibers with each other and the immobilization of more VEGF in the scaffold after treatment with sulfo-SMCC. We demonstrated that cross-linking led to a slower degradation rate of the collagen scaffolds, while cellularization was improved by both cross-linking and the presence of VEGF. On the other hand, angiogenesis was increased only moderately by cross-linking, but significantly more by the presence of immobilized VEGF. We conclude that collagen scaffolds chemically conjugated to VEGF by Traut's reagent and sulfo-SMCC is an effective delivery system in wound repair and tissue engineering.
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Bhise NS, Shmueli RB, Sunshine JC, Tzeng SY, Green JJ. Drug delivery strategies for therapeutic angiogenesis and antiangiogenesis. Expert Opin Drug Deliv 2011; 8:485-504. [PMID: 21338327 DOI: 10.1517/17425247.2011.558082] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Angiogenesis is essential to human biology and of great clinical significance. Excessive or reduced angiogenesis can result in, or exacerbate, several disease states, including tumor formation, exudative age-related macular degeneration (AMD) and ischemia. Innovative drug delivery systems can increase the effectiveness of therapies used to treat angiogenesis-related diseases. AREAS COVERED This paper reviews the basic biology of angiogenesis, including current knowledge about its disruption in diseases, with the focus on cancer and AMD. Anti- and proangiogenic drugs available for clinical use or in development are also discussed, as well as experimental drug delivery systems that can potentially improve these therapies to enhance or reduce angiogenesis in a more controlled manner. EXPERT OPINION Laboratory and clinical results have shown pro- or antiangiogenic drug delivery strategies to be effective in drastically slowing disease progression. Further research in this area will increase the efficacy, specificity and duration of these therapies. Future directions with composite drug delivery systems may make possible targeting of multiple factors for synergistic effects.
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Affiliation(s)
- Nupura S Bhise
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
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50
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Miyagi Y, Chiu LLY, Cimini M, Weisel RD, Radisic M, Li RK. Biodegradable collagen patch with covalently immobilized VEGF for myocardial repair. Biomaterials 2011; 32:1280-90. [PMID: 21035179 DOI: 10.1016/j.biomaterials.2010.10.007] [Citation(s) in RCA: 169] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Accepted: 10/03/2010] [Indexed: 01/07/2023]
Abstract
Vascularization of engineered tissues in vitro and in vivo remains a key problem in translation of engineered tissues to clinical practice. Growth factor signalling can be prolonged by covalent tethering, thus we hypothesized that covalent immobilization of vascular endothelial growth factor (VEGF-165) to a porous collagen scaffold will enable rapid vascularization in vivo. Covalent immobilization may be preferred over controlled release or cell transfection if the effects are desired within the biomaterial rather than the surrounding tissue. Scaffolds were prepared with 14.5 ± 1.4 ng (Low) or 97.2 ± 8.0 ng (High) immobilized VEGF, or left untreated (control), and used to replace a full right ventricular free wall defect in rat hearts. In addition to rapid vascularization, an effective cardiac patch should exhibit neither thinning nor dilatation upon implantation. In vitro, VEGF enhanced the growth of endothelial and bone marrow cells seeded onto scaffolds. In vivo, High VEGF patches had greater blood vessel density (p < 0.01) than control at Day 7 and 28 due to increased cell recruitment and proliferation (p < 0.05 vs. control). At Day 28, VEGF-treated patches were significantly thicker (p < 0.05) than control, and thickness correlated positively with neovascularization (r = 0.67, p = 0.023). Importantly, angiogenesis in VEGF scaffolds contributed to improved cell survival and tissue formation.
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Affiliation(s)
- Yasuo Miyagi
- Department of Surgery and Division of Cardiovascular Surgery, University of Toronto and University Health Network, Toronto, Ontario, Canada
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