1
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Rao KM, Kim E, Kim HJ, Uthappa UT, Han SS. Hyaluronic acid-quercetin pendant drug conjugate for wound healing applications. Int J Biol Macromol 2023; 240:124336. [PMID: 37030466 DOI: 10.1016/j.ijbiomac.2023.124336] [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: 12/16/2022] [Revised: 03/11/2023] [Accepted: 04/02/2023] [Indexed: 04/10/2023]
Abstract
In this study, a simple approach was used for the synthesis of a water-soluble hyaluronic acid-quercetin (HA-Q) pendant drug conjugate to evaluate its potential wound-healing properties. The HA-Q conjugation was confirmed by Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible spectrophotometry (UV-Vis), and nuclear magnetic resonance (NMR) spectroscopy techniques. To produce the HA-Q, quercetin was conjugated on the HA backbone to the extent of 44.7 %. The HA-Q conjugate was soluble in water and a solution with a concentration of 20 mg/ml was prepared. The conjugate exhibited good biocompatibility and supported the growth and cell migration of skin fibroblast cells. HA-Q presented improved radical scavenging capacity compared to quercetin (Q) alone. The overall results confirmed the potential role of HA-Q in wound healing applications.
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Affiliation(s)
- Kummara Madhusudana Rao
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Research Institute of cell culture, Yeungnam University, Gyeongsan 38541, Republic of Korea.
| | - Eunbi Kim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Hyeon Jin Kim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Uluvangada Thammaiah Uthappa
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Sung Soo Han
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Research Institute of cell culture, Yeungnam University, Gyeongsan 38541, Republic of Korea.
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2
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Abstract
The low regenerative potential of the human body hinders proper regeneration of dysfunctional or lost tissues and organs due to trauma, congenital defects, and diseases. Tissue or organ transplantation has hence been a major conventional option for replacing the diseased or dysfunctional body parts of the patients. In fact, a great number of patients on waiting lists would benefit tremendously if tissue and organs could be replaced with biomimetic spare parts on demand. Herein, regenerative medicine and advanced biomaterials strive to reach this distant goal. Tissue engineering aims to create new biological tissue or organ substitutes, and promote regeneration of damaged or diseased tissue and organs. This approach has been jointly evolving with the major advances in biomaterials, stem cells, and additive manufacturing technologies. In particular, three-dimensional (3D) bioprinting utilizes 3D printing to fabricate viable tissue-like structures (perhaps organs in the future) using bioinks composed of special hydrogels, cells, growth factors, and other bioactive contents. A third generation of multifunctional biomaterials could also show opportunities for building biomimetic scaffolds, upon which to regenerate stem cells in vivo. Besides, decellularization technology based on isolation of extracellular matrix of tissue and organs from their inhabiting cells is presented as an alternative to synthetic biomaterials. Today, the gained knowledge of functional microtissue engineering and biointerfaces, along with the remarkable advances in pluripotent stem cell technology, seems to be instrumental for the development of more realistic microphysiological 3D in vitro tissue models, which can be utilized for personalized disease modeling and drug development. This chapter will discuss the recent advances in the field of regenerative medicine and biomaterials, alongside challenges, limitations, and potentials of the current technologies.
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Affiliation(s)
- Şükran Şeker
- Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara, Turkey
| | - Ayşe Eser Elçin
- Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara, Turkey
| | - Yaşar Murat Elçin
- Ankara University Faculty of Science, Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara, Turkey.
- Biovalda Health Technologies, Inc., Ankara, Turkey.
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3
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Mechanotransduction of mesenchymal stem cells (MSCs) during cardiomyocytes differentiation. Heliyon 2022; 8:e11624. [DOI: 10.1016/j.heliyon.2022.e11624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 09/15/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
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4
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Decellularized tendon-based heparinized nanocomposite scaffolds for prospective regenerative applications: Chemical, physical, thermal, mechanical and in vitro biological evaluations. J Mech Behav Biomed Mater 2022; 134:105387. [DOI: 10.1016/j.jmbbm.2022.105387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/12/2022] [Accepted: 07/17/2022] [Indexed: 11/19/2022]
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5
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Functions of Mesenchymal Stem Cells in Cardiac Repair. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1312:39-50. [PMID: 33330961 DOI: 10.1007/5584_2020_598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Myocardial infarction (MI) and heart failure (HF) are significant contributors of mortality worldwide. Mesenchymal stem cells (MSCs) hold a great potential for cardiac regenerative medicine-based therapies. Their therapeutic potential has been widely investigated in various in-vitro and in-vivo preclinical models. Besides, they have been tested in clinical trials of MI and HF with various outcomes. Differentiation to lineages of cardiac cells, neovascularization, anti-fibrotic, anti-inflammatory, anti-apoptotic and immune modulatory effects are the main drivers of MSC functions during cardiac repair. However, the main mechanisms regulating these functions and cross-talk between cells are not fully known yet. Increasing line of evidence also suggests that secretomes of MSCs and/or their extracellular vesicles play significant roles in a paracrine manner while mediating these functions. This chapter aims to summarize and highlight cardiac repair functions of MSCs during cardiac repair.
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6
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Spatially-directed angiogenesis using ultrasound-controlled release of basic fibroblast growth factor from acoustically-responsive scaffolds. Acta Biomater 2021; 129:73-83. [PMID: 33964480 DOI: 10.1016/j.actbio.2021.04.048] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/06/2021] [Accepted: 04/26/2021] [Indexed: 02/06/2023]
Abstract
Vascularization is a critical step following implantation of an engineered tissue construct in order to maintain its viability. The ability to spatially pattern or direct vascularization could be therapeutically beneficial for anastomosis and vessel in-growth. However, acellular and cell-based strategies to stimulate vascularization typically do not afford this control. We have developed an ultrasound-based method of spatially- controlling regenerative processes using acellular, composite hydrogels termed acoustically-responsive scaffolds (ARSs). An ARS consists of a fibrin matrix doped with a phase-shift double emulsion (PSDE). A therapeutic payload, which is initially contained within the PSDE, is released by an ultrasound-mediated process called acoustic droplet vaporization (ADV). During ADV, the perfluorocarbon (PFC) phase within the PSDE is vaporized into a gas bubble. In this study, we generated ex situ four different spatial patterns of ADV within ARSs containing basic fibroblast growth factor (bFGF), which were subcutaneously implanted in mice. The PFC species within the PSDE significantly affected the morphology of the ARS, based on the stability of the gas bubble generated by ADV, which impacted host cell migration. Irrespective of PFC, significantly greater cell proliferation (i.e., up to 2.9-fold) and angiogenesis (i.e., up to 3.7-fold) were observed adjacent to +ADV regions of the ARSs compared to -ADV regions. The morphology of the PSDE, macrophage infiltration, and perfusion in the implant region were also quantified. These results demonstrate that spatially-defined patterns of ADV within an ARS can elicit spatially-defined patterns of angiogenesis. Overall, these finding can be applied to improve strategies for spatially-controlling vascularization. STATEMENT OF SIGNIFICANCE: Vascularization is a critical step following implantation of an engineered tissue. The ability to spatially pattern or direct vascularization could be therapeutically beneficial for inosculation and vessel in-growth. However, acellular and cell-based strategies to stimulate vascularization typically do not afford this control. We have developed an ultrasound-based method of spatially-controlling angiogenesis using acellular, composite hydrogels termed acoustically-responsive scaffolds (ARSs). An ARS consists of a fibrin matrix doped with a phase-shift double emulsion (PSDE). An ultrasound-mediated process called acoustic droplet vaporization (ADV) was used to release basic fibroblast growth factor (bFGF), which was initially contained within the PSDE. We demonstrate that spatially-defined patterns of ADV within an ARS can elicit spatially-defined patterns of angiogenesis in vivo. Overall, these finding can improve strategies for spatially-controlling vascularization.
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7
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Kim J, Lee KM, Han SH, Ko EA, Yoon DS, Park IK, Shin HC, Park KH, Lee JW. Development of stabilized dual growth factor-loaded hyaluronate collagen dressing matrix. J Tissue Eng 2021; 12:2041731421999750. [PMID: 33796249 PMCID: PMC7970265 DOI: 10.1177/2041731421999750] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 02/13/2021] [Indexed: 12/26/2022] Open
Abstract
Patients with diabetes experience impaired growth factor production such as
epidermal growth factor (EGF) and basic fibroblast growth factor (bFGF), and
they are reportedly involved in wound healing processes. Here, we report dual
growth factor-loaded hyaluronate collagen dressing (Dual-HCD) matrix, using
different ratios of the concentration of stabilized growth
factors—stabilized-EGF (S-EGF) and stabilized-bFGF (S-bFGF). At first, the
optimal concentration ratio of S-EGF to S-bFGF in the Dual-HCD matrix is
determined to be 1:2 in type I diabetic mice. This Dual-HCD matrix does not
cause cytotoxicity and can be used in vivo. The wound-healing effect of this
matrix is confirmed in type II diabetic mice. Dual HCD enhances angiogenesis
which promotes wound healing and thus, it shows a significantly greater
synergistic effect than the HCD matrix loaded with a single growth factor.
Overall, we conclude that the Dual-HCD matrix represents an effective
therapeutic agent for impaired diabetic wound healing.
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Affiliation(s)
- Jihyun Kim
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea.,Brain Korea 21 PLUS Project for Medical Sciences, Yonsei University College of Medicine, Seoul, South Korea
| | - Kyoung-Mi Lee
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Seung Hwan Han
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, South Korea
| | - Eun Ae Ko
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Dong Suk Yoon
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Ik Kyu Park
- R&D Center, Genewel Co., Ltd., Sungnam, South Korea
| | - Hang-Cheol Shin
- School of Systems Biomedical Science, Soongsil University, Seoul, South Korea
| | - Kwang Hwan Park
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Jin Woo Lee
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea.,Brain Korea 21 PLUS Project for Medical Sciences, Yonsei University College of Medicine, Seoul, South Korea.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, South Korea
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8
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Vurat MT, Ergun C, Elçin AE, Elçin YM. 3D Bioprinting of Tissue Models with Customized Bioinks. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1249:67-84. [PMID: 32602091 DOI: 10.1007/978-981-15-3258-0_5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The ordered assembly of multicellular structures mimicking native tissues has lately come into prominence for various applications of biomedicine. In this respect, three-dimensional bioprinting (3DP) of cells and other biologics through additive manufacturing techniques has brought the possibility to develop functional in vitro tissue models and perhaps creating de novo transplantable tissues or organs in time. Bioinks, which can be defined as the printable analogues of the extracellular matrix, represent the foremost component of 3DP. In this chapter, we attempt to elaborate the major classes of bioinks which are prevalently being evaluated for the 3DP of a wide range of tissue models.
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Affiliation(s)
- Murat Taner Vurat
- Biovalda Health Technologies, Inc., Ankara, Turkey
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey
| | - Can Ergun
- Biovalda Health Technologies, Inc., Ankara, Turkey
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey
| | - Ayşe Eser Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Yaşar Murat Elçin
- Biovalda Health Technologies, Inc., Ankara, Turkey.
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey.
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9
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Şeker Ş, Elçin AE, Elçin YM. Autologous protein-based scaffold composed of platelet lysate and aminated hyaluronic acid. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:127. [PMID: 31768643 DOI: 10.1007/s10856-019-6334-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
This study describes a protein-based scaffold using platelet rich plasma (PRP), aminated hyaluronic acid (HA-NH2) and Genipin for potential use in regenerative applications as an autologous tissue engineering scaffold. Human PRP was subjected to three freeze-thaw cycles for obtaining platelet lysates (PL). HA-NH2 was synthesized from hyaluronic acid. PL/HA-NH2 scaffolds were fabricated using different concentrations of genipin (0.05, 0.1 and 0.2%) and HA-NH2 (10, 20 and 30 mg/mL). Mechanical, physical, and chemical properties of the scaffolds were comprehensively investigated. The compressive test findings revealed that crosslinking with 0.1 and 0.2% genipin improved the mechanical properties of the scaffolds. SEM evaluations showed that the scaffolds exhibited an interconnected and macroporous structure. Besides, porosimetry analysis indicated a wide distribution of the scaffold pore-size. Rheological findings demonstrated that the G' values were higher than the G″ values, indicating that PL/HA-NH2 scaffolds had typical viscoelastic properties. In vitro biocompatibility studies showed that the scaffolds were both cytocompatible and hemocompatible. Alamar Blue test indicated that human adipose mesenchymal stem cells (hASCs) were able to attach, spread and proliferate on the scaffolds for 21 days-duration. Our findings clearly indicate that PL/HA-NH2 can be a promising autologous candidate scaffold for tissue engineering applications.
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Affiliation(s)
- Şükran Şeker
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Ayşe Eser Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Yaşar Murat Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey.
- Biovalda Health Technologies, Inc., Ankara, Turkey.
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10
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Zhu Y, Lu X, Dong X, Yuan J, Fabiilli ML, Wang X. LED-Based Photoacoustic Imaging for Monitoring Angiogenesis in Fibrin Scaffolds. Tissue Eng Part C Methods 2019; 25:523-531. [PMID: 31418322 DOI: 10.1089/ten.tec.2019.0151] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
IMPACT STATEMENT Noninvasive imaging techniques provide insight into physiology that is complementary to tissue morphology obtained by invasive histology. Optical imaging techniques, such as laser speckle contrast analysis, are used in vivo to longitudinally evaluate vascularization. Despite their high spatial resolution, these techniques have a limited imaging depth. In this study, we demonstrate how a dual LED-based photoacoustic (PA) and ultrasound system can delineate changes in perfusion at depth within scaffolds containing basic fibroblast growth factor. Perfusion changes detected by PA corroborated with vessel density. PA imaging could be a noninvasive and sensitive method for evaluating vascularization at depth in larger constructs.
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Affiliation(s)
- Yunhao Zhu
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan.,Department of Electronic Science and Engineering, Nanjing University, Nanjing, China
| | - Xiaofang Lu
- Department of Radiology, University of Michigan, Ann Arbor, Michigan
| | - Xiaoxiao Dong
- Department of Radiology, University of Michigan, Ann Arbor, Michigan.,Department of Ultrasound, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Jie Yuan
- Department of Electronic Science and Engineering, Nanjing University, Nanjing, China
| | - Mario L Fabiilli
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan.,Department of Radiology, University of Michigan, Ann Arbor, Michigan.,Department of Applied Physics Program, University of Michigan, Ann Arbor, Michigan
| | - Xueding Wang
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan.,Department of Radiology, University of Michigan, Ann Arbor, Michigan
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11
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Durkut S. Thermoresponsive poly (N-vinylcaprolactam)-g-galactosylated chitosan hydrogel: synthesis, characterization, and controlled release properties. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1525546] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Serap Durkut
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey
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12
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Liang M, Chen Z, Wang F, Liu L, Wei R, Zhang M. Preparation of self‐regulating/anti‐adhesive hydrogels and their ability to promote healing in burn wounds. J Biomed Mater Res B Appl Biomater 2018; 107:1471-1482. [DOI: 10.1002/jbm.b.34239] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 07/20/2018] [Accepted: 08/23/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Min Liang
- School of Pharmacy and Biological EngineeringChongqing University of Technology Chongqing 400054 China
| | - Zhongmin Chen
- School of Pharmacy and Biological EngineeringChongqing University of Technology Chongqing 400054 China
| | - Fuping Wang
- School of Pharmacy and Biological EngineeringChongqing University of Technology Chongqing 400054 China
| | - Lan Liu
- School of Pharmacy and Biological EngineeringChongqing University of Technology Chongqing 400054 China
| | - Runan Wei
- School of Pharmacy and Biological EngineeringChongqing University of Technology Chongqing 400054 China
| | - Mei Zhang
- School of Pharmacy and Biological EngineeringChongqing University of Technology Chongqing 400054 China
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13
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Koç Demir A, Elçin AE, Elçin YM. Osteogenic differentiation of encapsulated rat mesenchymal stem cells inside a rotating microgravity bioreactor: in vitro and in vivo evaluation. Cytotechnology 2018; 70:1375-1388. [PMID: 29943233 PMCID: PMC6214859 DOI: 10.1007/s10616-018-0230-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 05/23/2018] [Indexed: 01/24/2023] Open
Abstract
The objective of this study is to evaluate the in vitro and in vivo osteogenic potential of rat bone marrow mesenchymal stem cells (BM-MSCs) using chitosan/hydroxyapatite (C/HAp) microbeads as encapsulation matrix under osteoinductive medium and dynamic culture conditions. The degradation characteristics of C/HAp microbeads were evaluated under in vitro and in vivo conditions for 180 days. BM-MSCs were encapsulated in C/HAp microbeads with > 85% viability, and were cultured in a slow turning lateral vessel-type rotating bioreactor simulating microgravity conditions for 28 days, under the effect of osteogenic inducers. MTT assay showed that the metabolic activity of encapsulated cells was preserved > 80% after a week. In vitro experiments confirmed that the encapsulated BM-MSCs differentiated into osteoblastic cells, formed bone-like tissue under osteogenic microgravity bioreactor conditions. Preliminary in vivo study indicated C/HAp microbeads containing BM-MSCs were able to repair the surgically-created small bone defects in the rat femur. BM-MSCs-C/HAp composite microbeads may have potential for modular bone regeneration.
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Affiliation(s)
- Aysel Koç Demir
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Faculty of Science and Stem Cell Institute, Ankara University, Degol Caddesi, Tandogan, 06100, Ankara, Turkey
| | - Ayşe Eser Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Faculty of Science and Stem Cell Institute, Ankara University, Degol Caddesi, Tandogan, 06100, Ankara, Turkey
| | - Yaşar Murat Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Faculty of Science and Stem Cell Institute, Ankara University, Degol Caddesi, Tandogan, 06100, Ankara, Turkey.
- Biovalda Health Technologies, Inc., Ankara, Turkey.
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14
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Fakoya AOJ, Otohinoyi DA, Yusuf J. Current Trends in Biomaterial Utilization for Cardiopulmonary System Regeneration. Stem Cells Int 2018; 2018:3123961. [PMID: 29853910 PMCID: PMC5949153 DOI: 10.1155/2018/3123961] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/15/2017] [Accepted: 03/01/2018] [Indexed: 12/28/2022] Open
Abstract
The cardiopulmonary system is made up of the heart and the lungs, with the core function of one complementing the other. The unimpeded and optimal cycling of blood between these two systems is pivotal to the overall function of the entire human body. Although the function of the cardiopulmonary system appears uncomplicated, the tissues that make up this system are undoubtedly complex. Hence, damage to this system is undesirable as its capacity to self-regenerate is quite limited. The surge in the incidence and prevalence of cardiopulmonary diseases has reached a critical state for a top-notch response as it currently tops the mortality table. Several therapies currently being utilized can only sustain chronically ailing patients for a short period while they are awaiting a possible transplant, which is also not devoid of complications. Regenerative therapeutic techniques now appear to be a potential approach to solve this conundrum posed by these poorly self-regenerating tissues. Stem cell therapy alone appears not to be sufficient to provide the desired tissue regeneration and hence the drive for biomaterials that can support its transplantation and translation, providing not only physical support to seeded cells but also chemical and physiological cues to the cells to facilitate tissue regeneration. The cardiac and pulmonary systems, although literarily seen as just being functionally and spatially cooperative, as shown by their diverse and dissimilar adult cellular and tissue composition has been proven to share some common embryological codevelopment. However, necessitating their consideration for separate review is the immense adult architectural difference in these systems. This review also looks at details on new biological and synthetic biomaterials, tissue engineering, nanotechnology, and organ decellularization for cardiopulmonary regenerative therapies.
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Affiliation(s)
| | | | - Joshua Yusuf
- All Saints University School of Medicine, Roseau, Dominica
- All Saints University School of Medicine, Kingstown, Saint Vincent and the Grenadines
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15
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Effects of structurally stabilized EGF and bFGF on wound healing in type I and type II diabetic mice. Acta Biomater 2018; 66:325-334. [PMID: 29203426 DOI: 10.1016/j.actbio.2017.11.045] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/23/2017] [Accepted: 11/27/2017] [Indexed: 12/13/2022]
Abstract
Diabetes mellitus comprises a multiple metabolic disorder that affects millions of people worldwide and consequentially poses challenges for clinical treatment. Among the various complications, diabetic ulcer constitutes the most prevalent associated disorder and leads to delayed wound healing. To enhance wound healing capacity, we developed structurally stabilized epidermal growth factor (ST-EGF) and basic fibroblast growth factor (ST-bFGF) to overcome limitations of commercially available EGF (CA-EGF) and bFGF (CA-bFGF), such as short half-life and loss of activity after loading onto a matrix. Neither ST-EGF nor ST-bFGF was toxic, and both were more stable at higher temperatures than CA-EGF and CA-bFGF. We loaded ST-EGF and ST-bFGF onto a hyaluronate-collagen dressing (HCD) matrix, a biocompatible carrier, and tested the effectiveness of this system in promoting wound healing in a mouse model of diabetes. Wounds treated with HCD matrix loaded with 0.3 μg/cm2 ST-EGF or 1 μg/cm2 ST-bFGF showed a more rapid rate of tissue repair as compared to the control in type I and II diabetes models. Our results indicate that an HDC matrix loaded with 0.3 μg/cm2 ST-EGF or 1 μg/cm2 ST-bFGF can promote wound healing in diabetic ulcers and are suitable for use in wound dressings owing to their stability for long periods at room temperature. STATEMENT OF SIGNIFICANCE Various types of dressing materials loaded with growth factors, such as VEGF, EGF, and bFGF, are widely used to effect wound repair. However, such growth factor-loaded materials have several limitations for use as therapeutic agents in healing-impaired diabetic wounds. To overcome these limitations, we have developed new materials containing structurally stabilized EGF (ST-EGF) and bFGF (ST-bFGF). To confirm the wound healing capacity of newly developed materials (ST-EGF and ST-bFGF-loaded hyaluronate-collagen dressing [HCD] matrix), we applied these matrices in type I and type II diabetic wounds. Notably, these matrices were able to accelerate wound healing including re-epithelialization, neovascularization, and collagen deposition. Consequentially, these ST-EGF and ST-bFGF-loaded HCD matrix may be used as future therapeutic agents in patients with diabetic foot ulcers.
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16
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Lee SJ, Lee JB, Park YW, Lee DY. 3D Bioprinting for Artificial Pancreas Organ. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1064:355-374. [PMID: 30471043 DOI: 10.1007/978-981-13-0445-3_21] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Type 1 diabetes mellitus (T1DM) results from an autoimmune destruction of insulin-producing beta cells in the islet of the endocrine pancreas. Although islet transplantation has been regarded as an ideal strategy for T1D, transplanted islets are rejected from host immune system. To immunologically protect them, islet encapsulation technology with biocompatible materials is emerged as an immuno-barrier. However, this technology has been limited for clinical trial such as hypoxia in the central core of islet bead, impurity of islet bead and retrievability from the body. Recently, 3D bioprinting has been emerged as an alternative approach to make the artificial pancreas. It can be used to position live cells in a desired location with real scale of human organ. Furthermore, constructing a vascularization of the artificial pancreas is actualized with 3D bioprinting. Therefore, it is possible to create real pancreas-mimic artificial organ for clinical application. In conclusion, 3D bioprinting can become a new leader in the development of the artificial pancreas to overcome the existed islet.
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Affiliation(s)
- Seon Jae Lee
- Department of Bioengineering, College of Engineering, BK21 PLUS Future Biopharmaceutical Human Resource Training and Research Team, Hanyang University, Seoul, South Korea
| | - Jae Bin Lee
- Department of Bioengineering, College of Engineering, BK21 PLUS Future Biopharmaceutical Human Resource Training and Research Team, Hanyang University, Seoul, South Korea
| | - Young-Woo Park
- Department of Bioengineering, College of Engineering, BK21 PLUS Future Biopharmaceutical Human Resource Training and Research Team, Hanyang University, Seoul, South Korea
| | - Dong Yun Lee
- Department of Bioengineering, College of Engineering, BK21 PLUS Future Biopharmaceutical Human Resource Training and Research Team, Hanyang University, Seoul, South Korea. .,Institute of Nano Science & Technology (INST), Hanyang University, Seoul, South Korea.
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Tsui JH, Janebodin K, Ieronimakis N, Yama DMP, Yang HS, Chavanachat R, Hays AL, Lee H, Reyes M, Kim DH. Harnessing Sphingosine-1-Phosphate Signaling and Nanotopographical Cues To Regulate Skeletal Muscle Maturation and Vascularization. ACS NANO 2017; 11:11954-11968. [PMID: 29156133 PMCID: PMC6133580 DOI: 10.1021/acsnano.7b00186] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Despite possessing substantial regenerative capacity, skeletal muscle can suffer from loss of function due to catastrophic traumatic injury or degenerative disease. In such cases, engineered tissue grafts hold the potential to restore function and improve patient quality of life. Requirements for successful integration of engineered tissue grafts with the host musculature include cell alignment that mimics host tissue architecture and directional functionality, as well as vascularization to ensure tissue survival. Here, we have developed biomimetic nanopatterned poly(lactic-co-glycolic acid) substrates conjugated with sphingosine-1-phosphate (S1P), a potent angiogenic and myogenic factor, to enhance myoblast and endothelial maturation. Primary muscle cells cultured on these functionalized S1P nanopatterned substrates developed a highly aligned and elongated morphology and exhibited higher expression levels of myosin heavy chain, in addition to genes characteristic of mature skeletal muscle. We also found that S1P enhanced angiogenic potential in these cultures, as evidenced by elevated expression of endothelial-related genes. Computational analyses of live-cell videos showed a significantly improved functionality of tissues cultured on S1P-functionalized nanopatterns as indicated by greater myotube contraction displacements and velocities. In summary, our study demonstrates that biomimetic nanotopography and S1P can be combined to synergistically regulate the maturation and vascularization of engineered skeletal muscles.
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Affiliation(s)
- Jonathan H. Tsui
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Kajohnkiart Janebodin
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
- Department of Pathology, University of Washington, Seattle, Washington, USA
- Department of Anatomy, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Nicholas Ieronimakis
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
- Department of Pathology, University of Washington, Seattle, Washington, USA
- Department of Clinical Investigation, Madigan Army Medical Center, Tacoma, Washington, USA
| | - David M. P. Yama
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Hee Seok Yang
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, South Korea
| | | | - Aislinn L. Hays
- Department of Pathology, University of Washington, Seattle, Washington, USA
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Haeshin Lee
- Department of Chemistry and the Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Morayma Reyes
- Department of Pathology, University of Washington, Seattle, Washington, USA
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Deok-Ho Kim
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington, USA
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington, USA
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Ocular biocompatibility of gelatin microcarriers functionalized with oxidized hyaluronic acid. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 72:150-159. [DOI: 10.1016/j.msec.2016.11.067] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 10/26/2016] [Accepted: 11/17/2016] [Indexed: 11/21/2022]
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Durkut S, Elçin YM. Synthesis and characterization of thermosensitive poly(N-vinylcaprolactam)-g-collagen. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 45:1665-1674. [DOI: 10.1080/21691401.2016.1276925] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Serap Durkut
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Yaşar Murat Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
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20
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Wu J, Ye J, Zhu J, Xiao Z, He C, Shi H, Wang Y, Lin C, Zhang H, Zhao Y, Fu X, Chen H, Li X, Li L, Zheng J, Xiao J. Heparin-Based Coacervate of FGF2 Improves Dermal Regeneration by Asserting a Synergistic Role with Cell Proliferation and Endogenous Facilitated VEGF for Cutaneous Wound Healing. Biomacromolecules 2016; 17:2168-77. [PMID: 27196997 DOI: 10.1021/acs.biomac.6b00398] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Effective wound healing requires complicated, coordinated interactions and responses at protein, cellular, and tissue levels involving growth factor expression, cell proliferation, wound closure, granulation tissue formation, and vascularization. In this study, we develop a heparin-based coacervate consisting of poly(ethylene argininylaspartate digylceride) (PEAD) as a storage matrix, heparin as a bridge, and fibroblast growth factor-2 (FGF2) as a cargo (namely heparin-FGF2@PEAD) for wound healing. First, in vitro characterization demonstrates the loading efficiency and control release of FGF2 from the heparin-FGF2@PEAD coacervate. The following in vivo studies examine the wound healing efficiency of the heparin-FGF2@PEAD coacervate upon delivering FGF2 to full-thickness excisional skin wounds in vivo, in comparison with the other three control groups with saline, heparin@PEAD as vehicle, and free FGF2. Collective in vivo data show that controlled release of FGF2 to the wounds by the coacervate significantly accelerates the wound healing by promoting cell proliferation, stimulating the secretion of vascular endothelial growth factor (VEGF) for re-epithelization, collagen deposition, and granulation tissue formation, and enhancing the expression of platelet endothelial cell adhesion molecule (CD31) and alpha-smooth muscle actin (α-SMA) for blood vessel maturation. In parallel, no obvious wound healing effect is found for the control, vehicle, and free FGF2 groups, indicating the important role of the coavervate in the wound healing process. This work designs a suitable delivery system that can protect and release FGF2 in a sustained and controlled manner, which provides a promising therapeutic potential for topical treatment of wounds.
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Affiliation(s)
- Jiang Wu
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Jingjing Ye
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Jingjing Zhu
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Zecong Xiao
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Chaochao He
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Hongxue Shi
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Yadong Wang
- Department of Bioengineering and the McGowan Institute for Regenerative Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania 15219, United States
| | - Cai Lin
- The First Affiliate Hospital Wenzhou Medical University , Wenzhou, 325035, China
| | - Hongyu Zhang
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Yingzheng Zhao
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Xiaobing Fu
- Wound Healing and Cell Biology Laboratory Institute of Basic Medical Science, Chinese PLA General Hospital , Beijing 1008553, China
| | - Hong Chen
- Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States
| | - Xiaokun Li
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Lin Li
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
| | - Jie Zheng
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China.,Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States
| | - Jian Xiao
- School of Pharmaceutical Sciences Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University , Wenzhou, Zhejiang 325035, China
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Parvizi M, Bolhuis-Versteeg LA, Poot AA, Harmsen MC. Efficient generation of smooth muscle cells from adipose-derived stromal cells by 3D mechanical stimulation can substitute the use of growth factors in vascular tissue engineering. Biotechnol J 2016; 11:932-44. [DOI: 10.1002/biot.201500519] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 12/24/2015] [Accepted: 03/09/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Mojtaba Parvizi
- University of Groningen; University Medical Center Groningen, Department of Pathology and Medical Biology; Groningen the Netherlands
| | | | - André A. Poot
- Biomaterials Science and Technology; University of Twente; Enschede the Netherlands
| | - Martin C. Harmsen
- University of Groningen; University Medical Center Groningen, Department of Pathology and Medical Biology; Groningen the Netherlands
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Choi SM, Ryu HA, Lee KM, Kim HJ, Park IK, Cho WJ, Shin HC, Choi WJ, Lee JW. Development of Stabilized Growth Factor-Loaded Hyaluronate- Collagen Dressing (HCD) matrix for impaired wound healing. Biomater Res 2016; 20:9. [PMID: 27042331 PMCID: PMC4818407 DOI: 10.1186/s40824-016-0056-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 03/24/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Diabetes mellitus is a disease lack of insulin, which has severely delayed and impaired wound healing capacity. In the previous studies, various types of scaffolds and growth factors were used in impaired wound healing. However, there were several limitations to use them such as short half-life of growth factors in vivo and inadequate experimental conditions of wound-dressing material. Thus, our study aimed to determine the biocompatibility and stability of the matrix containing structurally stabilized epidermal growth factor (S-EGF) and basic fibroblast growth factor (S-bFGF). RESULTS AND DISCUSSION We stabilized EGF and bFGF that are structurally more stable than existing EGF and bFGF. We developed biocompatible matrix using S-EGF, S-bFGF, and hyaluronate- collagen dressing (HCD) matrix. The developed matrix, S-EGF and S-bFGF loaded on HCD matrix, had no cytotoxicity, in vitro. Also, these matrixes had longer releasing period that result in enhancement of half-life. Finally, when these matrixes were applied on the wound of diabetic mice, there were no inflammatory responses, in vivo. Thus, our results demonstrate that these matrixes are biologically safe and biocompatible as wound-dressing material. CONCLUSIONS Our stabilized EGF and bFGF was more stable than existing EGF and bFGF and the HCD matrix had the capacity to efficiently deliver growth factors. Thus, the S-EGF and S-bFGF loaded on HCD matrix had improved stability. Therefore, these matrixes may be suitable for impaired wound healing, resulting in application of clinical treatment.
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Affiliation(s)
- Seong Mi Choi
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, South Korea ; Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Hyun Aae Ryu
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Kyoung-Mi Lee
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | | | - Ik Kyu Park
- R&D center, Genewel co., Ltd, Sungnam, Korea
| | - Wan Jin Cho
- R&D center, Genewel co., Ltd, Sungnam, Korea
| | - Hang-Cheol Shin
- School of Systems Biomedical Science, Soongsil University, Seoul, 156-743 Korea
| | - Woo Jin Choi
- Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Jin Woo Lee
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, South Korea ; Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul, South Korea
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23
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Parmaksiz M, Dogan A, Odabas S, Elçin AE, Elçin YM. Clinical applications of decellularized extracellular matrices for tissue engineering and regenerative medicine. Biomed Mater 2016; 11:022003. [DOI: 10.1088/1748-6041/11/2/022003] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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24
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Mesenchymal stem cell-laden anti-inflammatory hydrogel enhances diabetic wound healing. Sci Rep 2015; 5:18104. [PMID: 26643550 PMCID: PMC4672289 DOI: 10.1038/srep18104] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 11/11/2015] [Indexed: 12/17/2022] Open
Abstract
The purpose of this study was to permit bone marrow mesenchymal stem cells (BMSCs) to reach their full potential in the treatment of chronic wounds. A biocompatible multifunctional crosslinker based temperature sensitive hydrogel was developed to deliver BMSCs, which improve the chronic inflammation microenvironments of wounds. A detailed in vitro investigation found that the hydrogel is suitable for BMSC encapsulation and can promote BMSC secretion of TGF-β1 and bFGF. In vivo, full-thickness skin defects were made on the backs of db/db mice to mimic diabetic ulcers. It was revealed that the hydrogel can inhibit pro-inflammatory M1 macrophage expression. After hydrogel association with BMSCs treated the wound, significantly greater wound contraction was observed in the hydrogel + BMSCs group. Histology and immunohistochemistry results confirmed that this treatment contributed to the rapid healing of diabetic skin wounds by promoting granulation tissue formation, angiogenesis, extracellular matrix secretion, wound contraction, and re-epithelialization. These results show that a hydrogel laden with BMSCs may be a promising therapeutic strategy for the management of diabetic ulcers.
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25
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Evaluation of a biomimetic poly(ε-caprolactone)/β-tricalcium phosphate multispiral scaffold for bone tissue engineering:In vitroandin vivostudies. Biointerphases 2014; 9:029011. [DOI: 10.1116/1.4870781] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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26
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Sun X, Cheng L, Zhao J, Jin R, Sun B, Shi Y, Zhang L, Zhang Y, Cui W. bFGF-grafted electrospun fibrous scaffolds via poly(dopamine) for skin wound healing. J Mater Chem B 2014; 2:3636-3645. [PMID: 32263800 DOI: 10.1039/c3tb21814g] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Electrospun fibrous membranes coated with basic fibroblast growth factor (bFGF) are effective medical devices to promote wound healing. However, the current strategies of adding bFGF generally cause degradation of electrospun materials or damage to the bioactivity of the biomolecules. Here, we have developed a simple strategy for surface bFGF-functionalization of electrospun fibers in an aqueous solution, which maintained original fiber properties and growth factor bioactivity. Polydopamine (PDA) forming the mussel foot protein was chosen as an adhesive polymeric bridge-layer between substrate poly(lactide-co-glycolide) (PLGA) fibers and bFGF. The bFGF-grafted PDA was analyzed using scanning electron microscopy, water contact angle measurements, and X-ray photoelectron spectroscopy. Improved hydrophilicity together with a stable fibrous structure and biodegradable fibrous matrix suggested that the PLGA/PDA-bFGF electrospun fibrous scaffolds have great potential for promoting wound healing. In vitro experiments showed that the bFGF-grafted PLGA electrospun fibrous scaffolds have highly enhanced adhesion, viability, and proliferation of human dermal fibroblasts. In vivo results showed that such scaffolds shortened wound healing time, accelerated epithelialization and promoted skin remodeling. Therefore, this PDA modification method can be a useful tool to graft biomolecules onto polymeric electrospun fibrous scaffolds which are potential scaffold candidates for repairing skin tissue.
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Affiliation(s)
- Xiaoming Sun
- Department of Plastic and Reconstructive Surgery, Ninth People's Hospital affiliated to Medical School of Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai 200011, People's Republic of China.
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27
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Walthers CM, Nazemi AK, Patel SL, Wu BM, Dunn JCY. The effect of scaffold macroporosity on angiogenesis and cell survival in tissue-engineered smooth muscle. Biomaterials 2014; 35:5129-37. [PMID: 24695092 DOI: 10.1016/j.biomaterials.2014.03.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 03/12/2014] [Indexed: 11/19/2022]
Abstract
Angiogenesis and survival of cells within thick scaffolds is a major concern in tissue engineering. The purpose of this study is to increase the survival of intestinal smooth muscle cells (SMCs) in implanted tissue-engineered constructs. We incorporated 250-μm pores in multi-layered, electrospun scaffolds with a macroporosity ranging from 15% to 25% to facilitate angiogenesis. The survival of green fluorescent protein (GFP)-expressing SMCs was evaluated after 2 weeks of implantation. Whereas host cellular infiltration was similar in scaffolds with different macroporosities, blood vessel development increased with increasing macroporosity. Scaffolds with 25% macropores had the most GFP-expressing SMCs, which correlated with the highest degree of angiogenesis over 1 mm away from the outermost layer. The 25% macroporous group exceeded a critical threshold of macropore connectivity, accelerating angiogenesis and improving implanted cell survival in a tissue-engineered smooth muscle construct.
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Affiliation(s)
| | - Alireza K Nazemi
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Shilpy L Patel
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Benjamin M Wu
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Department of Advanced Prosthodontics, Biomaterials, and Hospital Dentistry, University of California, Los Angeles, CA, USA
| | - James C Y Dunn
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Department of Surgery, University of California, Los Angeles, CA, USA.
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28
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Easton CD, Bullock AJ, Gigliobianco G, McArthur SL, MacNeil S. Application of layer-by-layer coatings to tissue scaffolds – development of an angiogenic biomaterial. J Mater Chem B 2014; 2:5558-5568. [DOI: 10.1039/c4tb00448e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Development of flexible coating strategies to promote angiogenesis is critical to effectively treat chronic, non-healing wounds.
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Affiliation(s)
- C. D. Easton
- CSIRO Manufacturing Flagship
- Clayton VIC 3168, Australia
| | - A. J. Bullock
- Department of Engineering Materials
- University of Sheffield
- Kroto Research Institute
- Broad Lane, UK
| | - G. Gigliobianco
- Department of Engineering Materials
- University of Sheffield
- Kroto Research Institute
- Broad Lane, UK
| | - S. L. McArthur
- Biotactical Engineering Group
- IRIS
- Faculty of Engineering and Industrial Sciences
- Swinburne University of Technology
- Hawthorn, Australia
| | - S. MacNeil
- Department of Engineering Materials
- University of Sheffield
- Kroto Research Institute
- Broad Lane, UK
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29
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Hirai K, Tabata Y, Hasegawa S, Sakai Y. Enhanced intestinal anastomotic healing with gelatin hydrogel incorporating basic fibroblast growth factor. J Tissue Eng Regen Med 2013; 10:E433-E442. [PMID: 24130076 DOI: 10.1002/term.1835] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 05/14/2013] [Accepted: 09/02/2013] [Indexed: 11/09/2022]
Abstract
Anastomotic leakage is a common complication of intestinal surgery. In an attempt to resolve this issue, a promising approach is enhancement of anastomotic wound healing. A method for controlled release of basic fibroblast growth factor (bFGF) using a gelatin hydrogel was developed with the objective of investigating the effects of this technology on intestinal anastomotic healing. The small intestine of Wistar rats was cut, end-to-end anastomosis was performed and rats were divided into three groups: bFGF group (anastomosis wrapped with a hydrogel sheet incorporating bFGF), PBS group (wrapped with a sheet incorporating phosphate-buffered saline solution) and NT group (no additional treatment). Degradation profiles of gelatin hydrogels in vivo and histological examinations were performed using gelatin hydrogels with various water contents and bFGF concentrations to define the optimal bFGF dose and hydrogel biodegradability. The anastomotic wound healing process was evaluated by histological examinations, adhesion-related score and bursting pressure. The optimal water content of the hydrogel and bFGF dose was determined as 96% and 30 µg per sheet, respectively. Application of bFGF significantly enhanced neovascularization, fibroblast infiltration and collagen production around the anastomotic site when compared with the other groups. Bursting pressure was significantly increased in the bFGF group. No significant difference was observed in the adhesion-related score among the groups and no anastomotic obstruction and leakage were observed. Therefore controlled release of bFGF enhanced healing of an intestinal anastomosis during the early postoperative period and is a promising method to suppress anastomotic leakage. Copyright © 2013 John Wiley & Sons, Ltd.
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Affiliation(s)
- Kenjiro Hirai
- Division of Gastrointestinal Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Japan.,Department of Biomaterials, Field of Tissue Engineering, Institute for Frontier Medical Sciences, Kyoto University, Japan
| | - Yasuhiko Tabata
- Department of Biomaterials, Field of Tissue Engineering, Institute for Frontier Medical Sciences, Kyoto University, Japan.
| | - Suguru Hasegawa
- Division of Gastrointestinal Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Japan
| | - Yoshiharu Sakai
- Division of Gastrointestinal Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Japan
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Fabiilli ML, Wilson CG, Padilla F, Martín-Saavedra FM, Fowlkes JB, Franceschi RT. Acoustic droplet-hydrogel composites for spatial and temporal control of growth factor delivery and scaffold stiffness. Acta Biomater 2013; 9:7399-409. [PMID: 23535233 DOI: 10.1016/j.actbio.2013.03.027] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 01/29/2013] [Accepted: 03/13/2013] [Indexed: 10/27/2022]
Abstract
Wound healing is regulated by temporally and spatially restricted patterns of growth factor signaling, but there are few delivery vehicles capable of the "on-demand" release necessary for recapitulating these patterns. Recently we described a perfluorocarbon double emulsion that selectively releases a protein payload upon exposure to ultrasound through a process known as acoustic droplet vaporization (ADV). In this study, we describe a delivery system composed of fibrin hydrogels doped with growth factor-loaded double emulsion for applications in tissue regeneration. Release of immunoreactive basic fibroblast growth factor (bFGF) from the composites increased up to 5-fold following ADV and delayed release was achieved by delaying exposure to ultrasound. Releasates of ultrasound-treated materials significantly increased the proliferation of endothelial cells compared to sham controls, indicating that the released bFGF was bioactive. ADV also triggered changes in the ultrastructure and mechanical properties of the fibrin as bubble formation and consolidation of the fibrin in ultrasound-treated composites were accompanied by up to a 22-fold increase in shear stiffness. ADV did not reduce the viability of cells suspended in composite scaffolds. These results demonstrate that an acoustic droplet-hydrogel composite could have broad utility in promoting wound healing through on-demand control of growth factor release and/or scaffold architecture.
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Abstract
INTRODUCTION Therapeutic angiogenesis is a strategy of inducing new collateral vessels and stimulating new capillaries that enhance tissue oxygen exchange in ischemic cardiovascular disorders, including acute myocardial infarction, chronic cardiac ischemia, peripheral artery disease and stroke. AREAS COVERED Over the last 10 years, promising results of early clinical trials have generated great expectation on the potential of therapeutic angiogenesis. However, even if large randomized placebo-controlled and double-blinded Phase II clinical trials have confirmed the feasibility, safety and potential effectiveness of therapeutic angiogenesis, they provided very limited evidence of its efficacy in terms of clinical benefit. EXPERT OPINION Results of the latest trials on therapeutic angiogenesis have not provided satisfactory results. Much is still unknown about the optimal delivery of angiogenic factors. Trials using alternative growth factors, dose regimens and methods of delivery are needed to enhance the treatment benefit of therapeutic angiogenesis.
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Affiliation(s)
- Domenico Ribatti
- University of Bari Medical School, National Cancer Institute, Giovanni Paolo II, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, Piazza G. Cesare, 11, Policlinico, 70124 Bari, Italy.
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Hao Z, Wu H, Hao L, Zhao Y, Ding Z, Yang F, Qu B. Preparation, characterization, and release behavior of ceftiofur-loaded gelatin-based microspheres. J Appl Polym Sci 2013. [DOI: 10.1002/app.39305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhihui Hao
- Laboratory of Biological Pharmaceutical; College of Chemical and Pharmaceutical Sciences, Qingdao Agricultural University; Qingdao; 266061; China
| | - Haoting Wu
- China Institute of Veterinary Drugs Control; Beijing; 100193; China
| | - Lihua Hao
- China Institute of Veterinary Drugs Control; Beijing; 100193; China
| | - Yongda Zhao
- Qingdao KDN Animal Drugs Technology Development Research Center; Qingdao; 266061; China
| | - Zhaopeng Ding
- Laboratory of Biological Pharmaceutical; College of Chemical and Pharmaceutical Sciences, Qingdao Agricultural University; Qingdao; 266061; China
| | - Fenfang Yang
- Laboratory of Biological Pharmaceutical; College of Chemical and Pharmaceutical Sciences, Qingdao Agricultural University; Qingdao; 266061; China
| | - Baohan Qu
- Laboratory of Biological Pharmaceutical; College of Chemical and Pharmaceutical Sciences, Qingdao Agricultural University; Qingdao; 266061; China
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Bai Y, Yin G, Huang Z, Liao X, Chen X, Yao Y, Pu X. Localized delivery of growth factors for angiogenesis and bone formation in tissue engineering. Int Immunopharmacol 2013; 16:214-23. [PMID: 23587487 DOI: 10.1016/j.intimp.2013.04.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 04/01/2013] [Accepted: 04/01/2013] [Indexed: 01/14/2023]
Abstract
Angiogenesis is a key component of bone formation. Delivery of growth factors for both angiogenesis and osteogenesis is about to gain important potential as a future therapeutic tool. This review focuses on these growth factors that have dual functions in angiogenesis and osteogenesis, and their localized application. A major hurdle in the clinical development of growth factor therapy so far is how to assure safe and efficacious therapeutic use of such factors and avoid unwanted side effects and toxicity. It is now firmly established from the available information that the type, dose, combinations and delivery kinetics of growth factors all play a decisive role for the success of growth factor therapy. All of these parameters have to be adapted and optimized for each animal model or clinical case. In this review we discuss some important parameters associated with growth factor therapy and present an overview of selected preclinical studies, followed by a conceptual description of both established and proposed delivery strategies meeting therapeutic needs.
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Affiliation(s)
- Yan Bai
- College of Materials Science and Engineering, Sichuan University, Chengdu 610064, PR China
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Liu F, Yu S, Wang Z, Sun X. Biomimetic construction of large engineered bone using hemoperfusion and cyto-capture in traumatic bone defect. Biores Open Access 2013; 1:247-51. [PMID: 23516672 PMCID: PMC3559229 DOI: 10.1089/biores.2012.0247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Due to lack of blood vessel systems, only a few tissues, such as skin, cartilage, and cornea, have been successfully constructed in vivo. Anticoagulative scaffolds have been used in drug-eluting stent systems both in animal studies and clinical therapies, as in the medicinal leech therapy used to salvage venous-congested microvascular free flaps improved perfusion inspired us to tackle this hurdle in bone tissue engineering. We hypothesize that a combination of bone marrow as the blood supply and a heparin/chitosan-coated acellular bone matrix that acts like hirudin, together with a vacuum-assisted closure therapy system, would provide blood perfusion to the scaffold. Using these methods, a biomimetically engineered bone construct would facilitate clinical translation in bone tissue engineering and offer new therapeutic strategies for reconstructing large bone defects if the hypothesis proves to be practical.
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Affiliation(s)
- Fei Liu
- Department of Orthopedics, 89th Hospital of People's Liberation Army , Weifang, China
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Jung Y, Dziennis S, Zhi Z, Reif R, Zheng Y, Wang RK. Tracking dynamic microvascular changes during healing after complete biopsy punch on the mouse pinna using optical microangiography. PLoS One 2013; 8:e57976. [PMID: 23469122 PMCID: PMC3585416 DOI: 10.1371/journal.pone.0057976] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 01/29/2013] [Indexed: 12/29/2022] Open
Abstract
Optical microangiography (OMAG) and Doppler optical microangiography (DOMAG) are two non-invasive techniques capable of determining the tissue microstructural content, microvasculature angiography, and blood flow velocity and direction. These techniques were used to visualize the acute and chronic microvascular and tissue responses upon an injury in vivo. A tissue wound was induced using a 0.5 mm biopsy punch on a mouse pinna. The changes in the microangiography, blood flow velocity and direction were quantified for the acute (<30 min) wound response and the changes in the tissue structure and microangiography were determined for the chronic wound response (30 min–60 days). The initial wound triggered recruitment of peripheral capillaries, as well as redirection of main arterial and venous blood flow within 3 min. The complex vascular networks and new vessel formation were quantified during the chronic response using fractal dimension. The highest rate of wound closure occurred between days 8 and 22. The vessel tortuosity increased during this time suggesting angiogenesis. Taken together, these data signify that OMAG has the capability to track acute and chronic changes in blood flow, microangiography and structure during wound healing. The use of OMAG has great potential to improve our understanding of vascular and tissue responses to injury in order to develop more effective therapeutics.
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Affiliation(s)
- Yeongri Jung
- Department of Bioengineering, University of Washington, Seattle, Washington, United States of America
| | - Suzan Dziennis
- Department of Bioengineering, University of Washington, Seattle, Washington, United States of America
| | - Zhongwei Zhi
- Department of Bioengineering, University of Washington, Seattle, Washington, United States of America
| | - Roberto Reif
- Department of Bioengineering, University of Washington, Seattle, Washington, United States of America
| | - Ying Zheng
- Department of Bioengineering, University of Washington, Seattle, Washington, United States of America
| | - Ruikang K. Wang
- Department of Bioengineering, University of Washington, Seattle, Washington, United States of America
- * E-mail:
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Baiguera S, Ribatti D. Endothelialization approaches for viable engineered tissues. Angiogenesis 2012; 16:1-14. [PMID: 23010872 DOI: 10.1007/s10456-012-9307-8] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 09/15/2012] [Indexed: 12/21/2022]
Abstract
One of the main limitation in obtaining thick, 3-dimensional viable engineered constructs is the inability to provide a sufficient and functional blood vessel system essential for the in vitro survival and the in vivo integration of the construct. Different strategies have been proposed to simulate the ingrowth of new blood vessels into engineered tissue, such as the use of growth factors, fabrication scaffold technologies, in vivo prevascularization and cell-based strategies, and it has been demonstrated that endothelial cells play a central role in the neovascularization process and in the control of blood vessel function. In particular, different "environmental" settings (origin, presence of supporting cells, biomaterial surface, presence of hemodynamic forces) strongly influence endothelial cell function, angiogenic potential and the in vivo formation of durable vessels. This review provides an overview of the different techniques developed so far for the vascularization of tissue-engineered constructs (with their advantages and pitfalls), focusing the attention on the recent development in the cell-based vascularization strategy and the in vivo applications.
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Affiliation(s)
- Silvia Baiguera
- BIOAIRLab, European Center for Thoracic Surgery, University Hospital Careggi, Florence, Italy.
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Rege A, Thakor NV, Rhie K, Pathak AP. In vivo laser speckle imaging reveals microvascular remodeling and hemodynamic changes during wound healing angiogenesis. Angiogenesis 2011; 15:87-98. [PMID: 22198198 DOI: 10.1007/s10456-011-9245-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 12/13/2011] [Indexed: 01/01/2023]
Abstract
Laser speckle contrast imaging (LSCI) is a high-resolution and high contrast optical imaging technique often used to characterize hemodynamic changes in short-term physiological experiments. In this study, we demonstrate the utility of LSCI for characterizing microvascular remodeling and hemodynamic changes during wound healing angiogenesis in vivo. A 2 mm diameter hole was made in the mouse ear and the periphery of the wound imaged in vivo using LSCI over 12 days. We were able to visualize and quantify the vascular and perfusion changes that accompanied wound healing in the microenvironment proximal to the wound, and validated these changes with histology. We found that consistent with the stages of wound healing, microvessel density increased during the initial inflammatory phase (i.e., day 0-3), stayed elevated through the tissue formation phase (i.e., until day 7) and returned to baseline during the tissue remodeling phase (i.e., by day 12). Concomitant "wide area mapping" of blood flow revealed that tissue perfusion in the wound periphery initially decreased, gradually increased from day 3-7, and subsided as healing completed. Interestingly, some regions exhibited a reestablishment of tissue perfusion approximately 6 days earlier than the ~18 days usually reported for the long term remodeling phase. The results from this study demonstrate that LSCI is an ideal platform for elucidating in vivo changes in microvascular hemodynamics and angiogenesis, and has the potential to offer invaluable insights in a range of disease models involving abnormal hemodynamics, such as diabetes and tumors.
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Affiliation(s)
- Abhishek Rege
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Bian L, Zhai DY, Tous E, Rai R, Mauck RL, Burdick JA. Enhanced MSC chondrogenesis following delivery of TGF-β3 from alginate microspheres within hyaluronic acid hydrogels in vitro and in vivo. Biomaterials 2011; 32:6425-34. [PMID: 21652067 DOI: 10.1016/j.biomaterials.2011.05.033] [Citation(s) in RCA: 267] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2011] [Accepted: 05/10/2011] [Indexed: 12/27/2022]
Abstract
Mesenchymal stem cells (MSCs) are being recognized as a viable cell source for cartilage repair and members of the transforming growth factor-beta (TGF-β) superfamily are a key mediator of MSC chondrogenesis. While TGF-β mediated MSC chondrogenesis is well established in in vitro pellet or hydrogel cultures, clinical translation will require effective delivery of TGF-βs in vivo. Here, we investigated the co-encapsulation of TGF-β3 containing alginate microspheres with human MSCs in hyaluronic acid (HA) hydrogels towards the development of implantable constructs for cartilage repair. TGF-β3 encapsulated in alginate microspheres with nanofilm coatings showed significantly reduced initial burst release compared to uncoated microspheres, with release times extending up to 6 days. HA hydrogel constructs seeded with MSCs and TGF-β3 containing microspheres developed comparable mechanical properties and cartilage matrix content compared to constructs supplemented with TGF-β3 continuously in culture media, whereas constructs with TGF-β3 directly encapsulated in the gels without microspheres had inferior properties. When implanted subcutaneously in nude mice, constructs containing TGF-β3 microspheres resulted in superior cartilage matrix formation when compared to groups without TGF-β3 or with TGF-β3 added directly to the gel. However, calcification was observed in implanted constructs after 8 weeks of subcutaneous implantation. To prevent this, the co-delivery of parathyroid hormone-related protein (PTHrP) with TGF-β3 in alginate microspheres was pursued, resulting in partially reduced calcification. This study demonstrates that the controlled local delivery of TGF-β3 is essential to neocartilage formation by MSCs and that further optimization is needed to avert the differentiation of chondrogenically induced MSCs towards a hypertrophic phenotype.
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Affiliation(s)
- Liming Bian
- Department of Bioengineering, University of Pennsylvania, 240 Skirkanich Hall, 210 South 33rd Street, Philadelphia, PA 19104, United States
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Radhakumary C, Nandkumar AM, Nair PD. Hyaluronic acid-g-poly(HEMA) copolymer with potential implications for lung tissue engineering. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.03.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Novosel EC, Kleinhans C, Kluger PJ. Vascularization is the key challenge in tissue engineering. Adv Drug Deliv Rev 2011; 63:300-11. [PMID: 21396416 DOI: 10.1016/j.addr.2011.03.004] [Citation(s) in RCA: 666] [Impact Index Per Article: 51.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 02/09/2011] [Accepted: 03/02/2011] [Indexed: 12/11/2022]
Abstract
The main limitation in engineering in vitro tissues is the lack of a sufficient blood vessel system - the vascularization. In vivo almost all tissues are supplied by these endothelial cell coated tubular networks. Current strategies to create vascularized tissues are discussed in this review. The first strategy is based on the endothelial cells and their ability to form new vessels known as neoangiogenesis. Herein prevascularization techniques are compared to approaches in which biomolecules, such as growth factors, cytokines, peptides and proteins as well as cells are applied to generate new vessels. The second strategy is focused on scaffold-based techniques. Naturally-derived scaffolds, which contain vessels, are distinguished from synthetically manufactured matrices. Advantages and pitfalls of the approaches to create vascularized tissues in vitro are outlined and feasible future strategies are discussed.
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