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Mullin JA, Rahmani E, Kiick KL, Sullivan MO. Growth factors and growth factor gene therapies for treating chronic wounds. Bioeng Transl Med 2024; 9:e10642. [PMID: 38818118 PMCID: PMC11135157 DOI: 10.1002/btm2.10642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 06/01/2024] Open
Abstract
Chronic wounds are an unmet clinical need affecting millions of patients globally, and current standards of care fail to consistently promote complete wound closure and prevent recurrence. Disruptions in growth factor signaling, a hallmark of chronic wounds, have led researchers to pursue growth factor therapies as potential supplements to standards of care. Initial studies delivering growth factors in protein form showed promise, with a few formulations reaching clinical trials and one obtaining clinical approval. However, protein-form growth factors are limited by instability and off-target effects. Gene therapy offers an alternative approach to deliver growth factors to the chronic wound environment, but safety concerns surrounding gene therapy as well as efficacy challenges in the gene delivery process have prevented clinical translation. Current growth factor delivery and gene therapy approaches have primarily used single growth factor formulations, but recent efforts have aimed to develop multi-growth factor approaches that are better suited to address growth factor insufficiencies in the chronic wound environment, and these strategies have demonstrated improved efficacy in preclinical studies. This review provides an overview of chronic wound healing, emphasizing the need and potential for growth factor therapies. It includes a summary of current standards of care, recent advances in growth factor, cell-based, and gene therapy approaches, and future perspectives for multi-growth factor therapeutics.
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Affiliation(s)
- James A. Mullin
- Department of Chemical and Biomolecular EngineeringUniversity of DelawareNewarkDelawareUSA
| | - Erfan Rahmani
- Department of Biomedical EngineeringUniversity of DelawareNewarkDelawareUSA
| | - Kristi L. Kiick
- Department of Biomedical EngineeringUniversity of DelawareNewarkDelawareUSA
- Department of Materials Science and EngineeringUniversity of DelawareNewarkDelawareUSA
| | - Millicent O. Sullivan
- Department of Chemical and Biomolecular EngineeringUniversity of DelawareNewarkDelawareUSA
- Department of Biomedical EngineeringUniversity of DelawareNewarkDelawareUSA
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Hwang J, Kiick KL, Sullivan MO. Modified hyaluronic acid-collagen matrices trigger efficient gene transfer and prohealing behavior in fibroblasts for improved wound repair. Acta Biomater 2022; 150:138-153. [PMID: 35907557 DOI: 10.1016/j.actbio.2022.07.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 11/01/2022]
Abstract
Growth factor therapy has demonstrated great promise for chronic wound repair, but controlling growth factor activity and cell phenotype over desired time frames remains a critical challenge. In this study, we developed a gene-activated hyaluronic acid-collagen matrix (GAHCM) comprising DNA/polyethylenimine (PEI) polyplexes retained on hyaluronic acid (HA)-collagen hydrogels using collagen mimetic peptides (CMPs). We hypothesized that manipulating both the number of CMP-collagen tethers and the ECM composition would provide a powerful strategy to control growth factor gene transfer kinetics while regulating cell behavior, resulting in enhanced growth factor activity for wound repair. We observed that polyplexes with 50% CMP-modified PEI (50 CP) showed enhanced retention of polyplexes in HCM hydrogels by 2.7-fold as compared to non-CMP modified polyplexes. Moreover, the incorporation of HA in the hydrogel promoted a significant increase in gene transfection efficiency based upon analysis of Gaussia luciferase (GLuc) reporter gene expression, and gene expression could be attenuated by blocking HA-CD44 signaling. Furthermore, when fibroblasts were exposed to vascular endothelial growth factor-A (VEGF-A)-GAHCM, the 50 CP matrix facilitated sustained VEGF-A production for up to 7 days, with maximal expression at day 5. Application of these VEGF-A-50 CP samples stimulated prolonged pro-healing responses, including the TGF-β1-induced myofibroblast-like phenotypes and enhanced closure of murine splinted wounds. Overall, these findings demonstrate the use of ECM-based materials to stimulate efficient gene transfer and regulate cellular phenotype, resulting in improved control of growth factor activity for wound repair. GAHCM have significant potential to overcome key challenges in growth factor therapy for regenerative medicine. STATEMENT OF SIGNIFICANCE: Despite great promise for growth factor therapies in wound treatment, controlling growth factor activity and providing a microenvironment for cells that maximizes growth factor signaling have continued to limit the success of existing formulations. Our GAHCM strategy, combining CMP gene delivery and hyaluronic acid-collagen matrix, enabled enhanced wound healing efficacy via the combination of controlled and localized growth factor expression and matrix-mediated regulation of cell behavior. Incorporation of CMPs and HA in the same matrix synergistically enhanced VEGF activity as compared with simpler matrices. Accordingly, GAHCM will advance our ability to leverage growth factor signaling for wound healing, resulting in new long-term treatments for recalcitrant wounds.
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Affiliation(s)
- Jeongmin Hwang
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | - Kristi L Kiick
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA; Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
| | - Millicent O Sullivan
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA; Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, USA.
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Power RN, Cavanagh BL, Dixon JE, Curtin CM, O’Brien FJ. Development of a Gene-Activated Scaffold Incorporating Multifunctional Cell-Penetrating Peptides for pSDF-1α Delivery for Enhanced Angiogenesis in Tissue Engineering Applications. Int J Mol Sci 2022; 23:1460. [PMID: 35163379 PMCID: PMC8835777 DOI: 10.3390/ijms23031460] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/17/2022] [Accepted: 01/21/2022] [Indexed: 12/18/2022] Open
Abstract
Non-viral gene delivery has become a popular approach in tissue engineering, as it permits the transient delivery of a therapeutic gene, in order to stimulate tissue repair. However, the efficacy of non-viral delivery vectors remains an issue. Our lab has created gene-activated scaffolds by incorporating various non-viral delivery vectors, including the glycosaminoglycan-binding enhanced transduction (GET) peptide into collagen-based scaffolds with proven osteogenic potential. A modification to the GET peptide (FLR) by substitution of arginine residues with histidine (FLH) has been designed to enhance plasmid DNA (pDNA) delivery. In this study, we complexed pDNA with combinations of FLR and FLH peptides, termed GET* nanoparticles. We sought to enhance our gene-activated scaffold platform by incorporating GET* nanoparticles into collagen-nanohydroxyapatite scaffolds with proven osteogenic capacity. GET* N/P 8 was shown to be the most effective formulation for delivery to MSCs in 2D. Furthermore, GET* N/P 8 nanoparticles incorporated into collagen-nanohydroxyapatite (coll-nHA) scaffolds at a 1:1 ratio of collagen:nanohydroxyapatite was shown to be the optimal gene-activated scaffold. pDNA encoding stromal-derived factor 1α (pSDF-1α), an angiogenic chemokine which plays a role in BMP mediated differentiation of MSCs, was then delivered to MSCs using our optimised gene-activated scaffold platform, with the aim of significantly increasing angiogenesis as an important precursor to bone repair. The GET* N/P 8 coll-nHA scaffolds successfully delivered pSDF-1α to MSCs, resulting in a significant, sustained increase in SDF-1α protein production and an enhanced angiogenic effect, a key precursor in the early stages of bone repair.
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Affiliation(s)
- Rachael N. Power
- Tissue Engineering Research Group, Royal College of Surgeons in Ireland (RCSI), D02 YN77 Dublin, Ireland; (R.N.P.); (C.M.C.)
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI, D02 YN77 Dublin, Ireland
| | | | - James E. Dixon
- School of Pharmacy, University of Nottingham Biodiscovery Institute, University of Nottingham, Nottingham NG7 2RD, UK;
| | - Caroline M. Curtin
- Tissue Engineering Research Group, Royal College of Surgeons in Ireland (RCSI), D02 YN77 Dublin, Ireland; (R.N.P.); (C.M.C.)
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI, D02 YN77 Dublin, Ireland
| | - Fergal J. O’Brien
- Tissue Engineering Research Group, Royal College of Surgeons in Ireland (RCSI), D02 YN77 Dublin, Ireland; (R.N.P.); (C.M.C.)
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI, D02 YN77 Dublin, Ireland
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Bjelić D, Finšgar M. Bioactive coatings with anti-osteoclast therapeutic agents for bone implants: Enhanced compliance and prolonged implant life. Pharmacol Res 2022; 176:106060. [PMID: 34998972 DOI: 10.1016/j.phrs.2022.106060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/24/2021] [Accepted: 01/03/2022] [Indexed: 12/18/2022]
Abstract
The use of therapeutic agents that inhibit bone resorption is crucial to prolong implant life, delay revision surgery, and reduce the burden on the healthcare system. These therapeutic agents include bisphosphonates, various nucleic acids, statins, proteins, and protein complexes. Their use in systemic treatment has several drawbacks, such as side effects and insufficient efficacy in terms of concentration, which can be eliminated by local treatment. This review focuses on the incorporation of osteoclast inhibitors (antiresorptive agents) into bioactive coatings for bone implants. The ability of bioactive coatings as systems for local delivery of antiresorptive agents to achieve optimal loading of the bioactive coating and its release is described in detail. Various parameters such as the suitable concentrations, release times, and the effects of the antiresorptive agents on nearby cells or bone tissue are discussed. However, further research is needed to support the optimization of the implant, as this will enable subsequent personalized design of the coating in terms of the design and selection of the coating material, the choice of an antiresorptive agent and its amount in the coating. In addition, therapeutic agents that have not yet been incorporated into bioactive coatings but appear promising are also mentioned. From this work, it can be concluded that therapeutic agents contribute to the biocompatibility of the bioactive coating by enhancing its beneficial properties.
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Affiliation(s)
- Dragana Bjelić
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Matjaž Finšgar
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
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Tsekoura EK, Dick T, Pankongadisak P, Graf D, Boluk Y, Uludağ H. Delivery of Bioactive Gene Particles via Gelatin-Collagen-PEG-Based Electrospun Matrices. Pharmaceuticals (Basel) 2021; 14:666. [PMID: 34358092 PMCID: PMC8308744 DOI: 10.3390/ph14070666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/01/2021] [Accepted: 07/07/2021] [Indexed: 12/22/2022] Open
Abstract
The fabrication of fiber mats via electrospinning has been adopted in the last decades to produce high quality scaffolds for tissue engineering. However, an effective combination of electrospinning methods with gene delivery therapies remains a challenge. In this study, we describe how the delivery of gene complexes via electrospun mats that contain different volumes of gelatin (Gel), collagen (Col), and polyethylene glycol (PEG) can affect gene expression by transfected cells. Non-viral complexes were formulated by using lipid modified polyethylenimine (PEI) polymer and plasmid DNAs (pDNA) like the reporter Green Fluorescent Protein (GFP) and the therapeutically relevant Bone Morphogenetic Protein-2 (BMP-2) and electrospuned after being mixed with different volumes of Gel-Col-PEG mats and delivered to human myoblast (C2C12) and mouse osteoblast cells (MC3T3). The entrapment of GFP complexes via different homogeneous electrospun fiber mats revealed that a high fraction of collagen in the mats affected the quality of the fibers and led to reduced transfection efficiency on target cells. On the other hand, the fabrication of double-layered mats that contained collagen without complexes as a first layer and gelatin-collagen-PEG with complexes as a second layer successfully induced GFP expression and ALP activity in C2C12 cells. We conclude that this study has established the advantage of formulating multilayered bioactive collagen-based mats for gene delivery applications.
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Affiliation(s)
- Eleni K. Tsekoura
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; (E.K.T.); (T.D.)
| | - Teo Dick
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; (E.K.T.); (T.D.)
| | | | - Daniel Graf
- Department of Dentistry, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2R7, Canada;
| | - Yaman Boluk
- Department of Civil & Environmental Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;
| | - Hasan Uludağ
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada; (E.K.T.); (T.D.)
- Faculty of Pharmacy & Pharmaceutical Sciences, University of Alberta, Edmonton, AB T6G 2H7, Canada
- Department of Biomedical Engineering, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB T6G 2V2, Canada
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González-Vázquez A, Raftery RM, Günbay S, Chen G, Murray DJ, O'Brien FJ. Accelerating bone healing in vivo by harnessing the age-altered activation of c-Jun N-terminal kinase 3. Biomaterials 2020; 268:120540. [PMID: 33307368 DOI: 10.1016/j.biomaterials.2020.120540] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 11/10/2020] [Accepted: 11/13/2020] [Indexed: 02/07/2023]
Abstract
We have recently demonstrated that c-Jun N-terminal kinase 3 (JNK3) is a key modulator of the enhanced osteogenic potential of stem cells derived from children when compared to those derived from adults. In this study, we formulated a JNK3-activator nanoparticle (JNK3*) that recapitulates the immense osteogenic potential of juvenile cells in adult stem cells by facilitating JNK3 activation. Moreover, we aimed to functionalize a collagen-based scaffold by incorporating the JNK3* in order to develop an advanced platform capable of accelerating bone healing by recruitment of host stem cells. Our data, in vitro and in vivo, demonstrated that the immense osteogenic potential of juvenile cells could be recapitulated in adult stem cells by facilitating JNK3 activation. Moreover, our results revealed that the JNK3* functionalized 3D scaffold induced the fastest bone healing and greatest blood vessel infiltration when implanted in critical-size rat calvarial defects in vivo. JNK3*scaffold fastest bone healing in vivo was associated with its capacity to recruit host stem cells to the site of injury and promote angiogenic-osteogenic coupling (e.g. Vegfa, Tie1, Runx2, Alp and Igf2 upregulation). In summary, this study has demonstrated the potential of harnessing knowledge of age-altered stem cell mechanobiology in order to develop a materials-based functionalization approach for the repair of large tissue defects.
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Affiliation(s)
- Arlyng González-Vázquez
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), Dublin 2 D02 YN77, Ireland; Advanced Materials Bio-Engineering Research Centre (AMBER), RCSI and TCD, Dublin 2 D02 PN40, Ireland
| | - Rosanne M Raftery
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), Dublin 2 D02 YN77, Ireland; Advanced Materials Bio-Engineering Research Centre (AMBER), RCSI and TCD, Dublin 2 D02 PN40, Ireland
| | - Suzan Günbay
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), Dublin 2 D02 YN77, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin (TCD), Dublin 2 D02 PN40, Ireland
| | - Gang Chen
- Department of Physiology and Medical Physics, RCSI, Dublin 2 D02 YN77, Ireland
| | - Dylan J Murray
- National Paediatric Craniofacial Centre, Children's Health Ireland at Temple Street, Temple Street, Rotunda, Dublin 1 D01 XD99, Ireland
| | - Fergal J O'Brien
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin (TCD), Dublin 2 D02 PN40, Ireland; Advanced Materials Bio-Engineering Research Centre (AMBER), RCSI and TCD, Dublin 2 D02 PN40, Ireland; Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, RCSI University of Medicine and Health Sciences, Dublin 2 D02 YN77, Ireland.
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Xu F, Ren H, Zheng M, Shao X, Dai T, Wu Y, Tian L, Liu Y, Liu B, Gunster J, Liu Y, Liu Y. Development of biodegradable bioactive glass ceramics by DLP printed containing EPCs/BMSCs for bone tissue engineering of rabbit mandible defects. J Mech Behav Biomed Mater 2019; 103:103532. [PMID: 31756563 DOI: 10.1016/j.jmbbm.2019.103532] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/11/2019] [Accepted: 11/12/2019] [Indexed: 01/12/2023]
Abstract
Bioactive glass ceramics have excellent biocompatibility and osteoconductivity; and can form direct chemical bonds with human bones; thus, these ceramic are considered as "Smart" materials. In this study, we develop a new type of bioactive glass ceramic (AP40mod) as a scaffold containing Endothelial progenitor cells (EPCs) and Mesenchymal stem cells (BMSCs) to repair critical-sized bone defects in rabbit mandibles. For in vitro experiments: AP40mod was prepared by Dgital light processing (DLP) system and the optimal ratio of EPCs/BMSCs was screened by analyzing cell proliferation and ALP activity, as well as the influence of genes related to osteogenesis and angiogenesis by direct inoculation into scaffolds. The scaffold showed suitable mechanical properties, with a Bending strength 52.7 MPa and a good biological activity. Additionally, when EPCs/BMSCs ratio were combined at a ratio of 2:1 with AP40mod, the ALP activity, osteogenesis and angiogenesis were significantly increased. For in vivo experiments: application of AP40mod/EPCs/BMSCs (after 7 days of in vitro spin culture) to repair and reconstruct critical-sized mandible defect in rabbit showed that all scaffolds were successfully accurately implanted into the defect area. As revealed by macroscopically and CT at the end of 9 months, defects in the AP40mod/EPCs/BMSCs group were nearly completely covered by normal bone and the degradation rate was 29.9% compared to 20.1% in the AP40mod group by the 3D reconstruction. As revealed by HE and Masson staining analyses, newly formed blood vessels, bone marrow and collagen maturity were significantly increased in the AP40mod/EPCs/BMSCs group compared to those in the AP40mod group. We directly inoculated cells on the novel material to screen for the best inoculation ratio. It is concluded that the AP40mod combination of EPCs/BMSCs is a promising approach for repairing and reconstructing large load bearing bone defect.
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Affiliation(s)
- Fangfang Xu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China
| | - Hui Ren
- State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Mengjie Zheng
- Department of Oral and Maxillofacial Surgery,General Hospital of Northern Theater Command, Shen'yang, 110016, PR China
| | - Xiaoxi Shao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China
| | - Taiqiang Dai
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China
| | - Yanlong Wu
- State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Lei Tian
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China
| | - Yu Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China
| | - Bin Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases, Laboratory Animal Center, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China
| | - Jens Gunster
- Division of Ceramic Processing and Biomaterials, BAM Federal Institute for Materials and Research and Testing, Unter Den Eichen 44-46, 12203, Berlin, Germany
| | - Yaxiong Liu
- State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - Yanpu Liu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, PR China.
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8
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Grier WK, Sun Han Chang RA, Ramsey MD, Harley BA. The influence of cyclic tensile strain on multi-compartment collagen-GAG scaffolds for tendon-bone junction repair. Connect Tissue Res 2019; 60:530-543. [PMID: 31007094 PMCID: PMC6706312 DOI: 10.1080/03008207.2019.1601183] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Background: Orthopedic injuries often occur at the interface between soft tissues and bone. The tendon-bone junction (TBJ) is a classic example of such an interface. Current clinical strategies for TBJ injuries prioritize mechanical reattachment over regeneration of the native interface, resulting in poor outcomes. The need to promote regenerative healing of spatially-graded tissues inspires our effort to develop new tissue engineering technologies that replicate features of the spatially-graded extracellular matrix and strain profiles across the native TBJ. Materials and Methods: We recently described a biphasic collagen-glycosaminoglycan (CG) scaffold containing distinct compartment with divergent mineral content and structural alignment (isotropic vs. anisotropic) linked by a continuous interface zone to mimic structural and compositional features of the native TBJ. Results: Here, we report application of cyclic tensile strain (CTS) to the scaffold via a bioreactor leads to non-uniform strain profiles across the spatially-graded scaffold. Further, combinations of CTS and matrix structural features promote rapid, spatially-distinct differentiation profiles of human bone marrow-derived mesenchymal stem cells (MSCs) down multiple osteotendinous lineages. CTS preferentially upregulates MSC activity and tenogenic differentiation in the anisotropic region of the scaffold. This work demonstrates a tissue engineering approach that couples instructive biomaterials with cyclic tensile stimuli to promote regenerative healing of orthopedic interfaces.
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Affiliation(s)
- William K. Grier
- Dept. Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Raul A. Sun Han Chang
- Dept. Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Matthew D. Ramsey
- Dept. Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Brendan A.C. Harley
- Dept. Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
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9
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Paidikondala M, Kadekar S, Varghese OP. Innovative Strategy for 3D Transfection of Primary Human Stem Cells with BMP-2 Expressing Plasmid DNA: A Clinically Translatable Strategy for Ex Vivo Gene Therapy. Int J Mol Sci 2018; 20:ijms20010056. [PMID: 30583610 PMCID: PMC6337215 DOI: 10.3390/ijms20010056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/10/2018] [Accepted: 12/20/2018] [Indexed: 12/26/2022] Open
Abstract
Ex vivo gene therapy offers enormous potential for cell-based therapies, however, cumbersome in vitro cell culture conditions have limited its use in clinical practice. We have optimized an innovative strategy for the transient transfection of bone morphogenetic protein-2 (BMP-2) expressing plasmids in suspended human stem cells within 5-min that enables efficient loading of the transfected cells into a 3D hydrogel system. Such a short incubation time for lipid-based DNA nanoparticles (lipoplexes) reduces cytotoxicity and at the same time reduces the processing time for cells to be transplanted. The encapsulated human mesenchymal stromal/stem cells (hMSCs) transfected with BMP-2 plasmid demonstrated high expression of an osteogenic transcription factor, namely RUNX2, but not the chondrogenic factor (SOX9), within the first three days. This activation was also reflected in the 7-day and 21-day experiment, which clearly indicated the induction of osteogenesis but not chondrogenesis. We believe our transient transfection method demonstrated in primary MSCs can be adapted for other therapeutic genes for different cell-based therapeutic applications.
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Affiliation(s)
- Maruthibabu Paidikondala
- Translational Chemical Biology Laboratory, Polymer Chemistry Division, Department of Chemistry⁻Ångström Laboratory, Uppsala University, 751 21 Uppsala, Sweden.
| | - Sandeep Kadekar
- Translational Chemical Biology Laboratory, Polymer Chemistry Division, Department of Chemistry⁻Ångström Laboratory, Uppsala University, 751 21 Uppsala, Sweden.
| | - Oommen P Varghese
- Translational Chemical Biology Laboratory, Polymer Chemistry Division, Department of Chemistry⁻Ångström Laboratory, Uppsala University, 751 21 Uppsala, Sweden.
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Grier WK, Tiffany AS, Ramsey MD, Harley BA. Incorporating β-cyclodextrin into collagen scaffolds to sequester growth factors and modulate mesenchymal stem cell activity. Acta Biomater 2018; 76:116-125. [PMID: 29944975 DOI: 10.1016/j.actbio.2018.06.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 06/21/2018] [Accepted: 06/22/2018] [Indexed: 12/31/2022]
Abstract
The development of biomaterials for a range of tissue engineering applications increasingly requires control over the bioavailability of biomolecular cues such as growth factors in order to promote desired cell responses. While efforts have predominantly concentrated on covalently-bound or freely-diffusible incorporation of biomolecules in porous, three-dimensional biomaterials, opportunities exist to exploit transient interactions to concentrate growth factor activity over desired time frames. Here, we report the incorporation of β-cyclodextrin into a model collagen-GAG scaffold as a means to exploit the passive sequestration and release of growth factors via guest-host interactions to control mesenchymal stem cell differentiation. Collagen-GAG scaffolds that incorporate β-cyclodextrin show improved sequestration as well as extended retention and release of TGF-β1. We further show extended retention and release of TGF-β1 and BMP-2 from β-cyclodextrin modified scaffolds was sufficient to influence the metabolic activity and proliferation of mesenchymal stem cells as well as differential activation of Smad 2/3 and Smad 1/5/8 pathways associated with differential osteo-chondral differentiation. Further, gene expression analysis showed TGF-β1 release from β-cyclodextrin CG scaffolds promoted early chondrogenic-specific differentiation. Ultimately, this work establishes a novel method for the incorporation and display of growth factors within CG scaffolds via supramolecular interactions. Such a design framework offers opportunities to selectively alter the bioavailability of multiple biomolecules within a three-dimensional collagen-GAG scaffold to enhance cell activity for a range of musculoskeletal regenerative medicine applications. STATEMENT OF SIGNIFICANCE We describe the incorporation of β-cyclodextrin into a model CG-scaffold under development for musculoskeletal tissue engineering applications. We show β-cyclodextrin modified scaffolds promote the sequestration of soluble TGF-β1 and BMP-2 via guest-host interactions, leading to extended retention and release. Further, β-cyclodextrin modified CG scaffolds promote TGF-β1 or BMP-2 specific Smad signaling pathway activation associated with divergent osseous versus chondrogenic differentiation pathways in mesenchymal stem cells.
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11
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Pro-angiogenic impact of SDF-1α gene-activated collagen-based scaffolds in stem cell driven angiogenesis. Int J Pharm 2018; 544:372-379. [PMID: 29555441 DOI: 10.1016/j.ijpharm.2018.03.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 02/19/2018] [Accepted: 03/15/2018] [Indexed: 12/22/2022]
Abstract
Ensuring an adequate angiogenic response during wound healing is a prevailing clinical challenge in biomaterials science. To address this, we aimed to develop a pro-angiogenic gene-activated scaffold (GAS) that could activate MSCs to produce paracrine factors and influence angiogenesis and wound repair. A non-viral polyethyleneimine (PEI) nanoparticles carrying a gene encoding for stromal derived factor-1 alpha (SDF-1α) was combined with a collagen-chondroitin sulfate scaffold to produce the GAS. The ability of this platform to enhance the angiogenic potential of mesenchymal stem cells (MSCs) was then assessed. We found that the MSCs on GAS exhibited early over-expression of SDF-1α mRNA with the activation of angiogenic markers VEGF and CXCR4. Exposing endothelial cells to conditioned media collected from GAS supported MSCs promoted a 20% increase in viability and 33% increase in tubule formation (p < 0.05). Furthermore, the conditioned media promoted a 50% increase in endothelial cell migration and wound closure (p < 0.005). Gene expression analysis of the endothelial cells revealed that the functional response was associated with up-regulation of angiogenic genes; VEGF, CXCR4, eNOS and SDF-1α. Overall, this study shows collagen-based scaffolds combined with SDF-1α gene therapy can provide enhanced pro-angiogenic response, suggesting a promising approach to overcome poor vasculature during wound healing.
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David G, Clima L, Calin M, Constantinescu CA, Balan-Porcarasu M, Uritu CM, Simionescu BC. Squalene/polyethylenimine based non-viral vectors: synthesis and use in systems for sustained gene release. Polym Chem 2018. [DOI: 10.1039/c7py01720k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New squalene/BPEI conjugates, acting as efficient gene carriers, were included in the 3D matrix, yielding tunable DNA release and long-term bioavailability.
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Affiliation(s)
- Geta David
- Department of Natural and Synthetic Polymers
- “Gh. Asachi” Technical University of Iasi
- Iasi 700050
- Romania
| | - Lilia Clima
- “Petru Poni” Institute of Macromolecular Chemistry of Romanian Academy
- Iasi 700487
- Romania
| | - Manuela Calin
- Institute of Cellular Biology and Pathology “Nicolae Simionescu” of Romanian Academy
- Bucharest 050568
- Romania
| | | | | | - Cristina Mariana Uritu
- “Petru Poni” Institute of Macromolecular Chemistry of Romanian Academy
- Iasi 700487
- Romania
- Advanced Research and Development Center in Experimental Medicine
- “Gr. T. Popa” University of Medicine and Pharmacy
| | - Bogdan C. Simionescu
- Department of Natural and Synthetic Polymers
- “Gh. Asachi” Technical University of Iasi
- Iasi 700050
- Romania
- “Petru Poni” Institute of Macromolecular Chemistry of Romanian Academy
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Walsh DP, Heise A, O’Brien FJ, Cryan SA. An efficient, non-viral dendritic vector for gene delivery in tissue engineering. Gene Ther 2017; 24:681-691. [DOI: 10.1038/gt.2017.58] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 05/25/2017] [Accepted: 06/16/2017] [Indexed: 12/19/2022]
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Grier W, Moy A, Harley B. Cyclic tensile strain enhances human mesenchymal stem cell Smad 2/3 activation and tenogenic differentiation in anisotropic collagen-glycosaminoglycan scaffolds. Eur Cell Mater 2017; 33:227-239. [PMID: 28319248 PMCID: PMC5453510 DOI: 10.22203/ecm.v033a14] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Stem cell research arose from the need to explore new therapeutic possibilities for intractable and lethal diseases. Although musculoskeletal disorders are basically nonlethal, their high prevalence and relative ease of performing clinical trials have facilitated the clinical application of stem cells in this field. However, few reliable clinical studies have been published, despite the plethora of in vitro and preclinical studies in stem cell research for regenerative medicine in the musculoskeletal system. Stem cell therapy can be applied locally for bone, cartilage and tendon regeneration. Candidate disease modalities in bone regeneration include large bone defects, nonunion of fractures, and osteonecrosis. Focal osteochondral defect and osteoarthritis are current targets for cartilage regeneration. For tendon regeneration, bone-tendon junction problems such as rotator cuff tears are hot topics in clinical research. To date, the literature supporting stem cell-based therapies comprises mostly case reports or case series. Therefore, high-quality evidence, including from randomised clinical trials, is necessary to define the role of cell-based therapies in the treatment of musculoskeletal disorders. It is imperative that clinicians who adopt stem cell treatment into their practices possess a good understanding of the natural course of the disease. It is also highly recommended that treating physicians do not thrust aside the concomitant use of established measures until stem cell therapy is evidently proved worthy in terms of efficacy and cost. The purpose of this review is to summarise on the current status of stem cell application in the orthopaedic field along with the author's view of future prospects.
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Affiliation(s)
- W.K. Grier
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - A.S. Moy
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - B.A.C. Harley
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA,Address for correspondence: B.A.C. Harley, Department of Chemical and Biomolecular Engineering, Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 110 Roger Adams Laboratory, 600 S. Mathews Ave, Urbana, IL 61801, USA, Telephone number: +1 2172447112, Fax number: +1 2173335052,
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Badieyan ZS, Berezhanskyy T, Utzinger M, Aneja MK, Emrich D, Erben R, Schüler C, Altpeter P, Ferizi M, Hasenpusch G, Rudolph C, Plank C. Transcript-activated collagen matrix as sustained mRNA delivery system for bone regeneration. J Control Release 2016; 239:137-48. [PMID: 27586186 DOI: 10.1016/j.jconrel.2016.08.037] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 08/16/2016] [Accepted: 08/27/2016] [Indexed: 12/18/2022]
Abstract
Transcript therapies using chemically modified messenger RNAs (cmRNAs) are emerging as safe and promising alternatives for gene and recombinant protein therapies. However, their applications have been limited due to transient translation and relatively low stability of cmRNAs compared to DNA. Here we show that vacuum-dried cmRNA-loaded collagen sponges, termed transcript activated matrices (TAMs), can serve as depots for sustained delivery of cmRNA. TAMs provide steady state protein production for up to six days, and substantial residual expression until 11days post transfection. Another advantage of this technology was nearly 100% transfection efficiency as well as low toxicity in vitro. TAMs were stable for at least 6months at room temperature. Human BMP-2-encoding TAMs induced osteogenic differentiation of MC3T3-E1 cells in vitro and bone regeneration in a non-critical rat femoral bone defect model in vivo. In summary, TAMs are a promising tool for bone regeneration and potentially also for other applications in regenerative medicine and tissue engineering.
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Affiliation(s)
- Zohreh Sadat Badieyan
- Institute of Molecular Immunology - Experimental Oncology, Technische Universität München, Munich, Germany
| | - Taras Berezhanskyy
- Institute of Molecular Immunology - Experimental Oncology, Technische Universität München, Munich, Germany; Ethris GmbH, Planegg, Germany
| | - Maximilian Utzinger
- Ethris GmbH, Planegg, Germany; Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-Universität München, Munich, Germany
| | | | | | - Reinhold Erben
- Department of Physiology, Pathophysiology and Experimental Endocrinology, Veterinärmedizinische Universität Wien, Vienna, Austria
| | - Christiane Schüler
- Department of Physiology, Pathophysiology and Experimental Endocrinology, Veterinärmedizinische Universität Wien, Vienna, Austria
| | - Philipp Altpeter
- Center for Nanoscience and Department of Physics, Ludwig-Maximilians-Universität München, Munich, Germany
| | | | | | | | - Christian Plank
- Institute of Molecular Immunology - Experimental Oncology, Technische Universität München, Munich, Germany; Ethris GmbH, Planegg, Germany.
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Raftery RM, Walsh DP, Castaño IM, Heise A, Duffy GP, Cryan SA, O'Brien FJ. Delivering Nucleic-Acid Based Nanomedicines on Biomaterial Scaffolds for Orthopedic Tissue Repair: Challenges, Progress and Future Perspectives. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5447-5469. [PMID: 26840618 DOI: 10.1002/adma.201505088] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 11/27/2015] [Indexed: 06/05/2023]
Abstract
As well as acting to fill defects and allow for cell infiltration and proliferation in regenerative medicine, biomaterial scaffolds can also act as carriers for therapeutics, further enhancing their efficacy. Drug and protein delivery on scaffolds have shown potential, however, supraphysiological quantities of therapeutic are often released at the defect site, causing off-target side effects and cytotoxicity. Gene therapy involves the introduction of foreign genes into a cell in order to exert an effect; either replacing a missing gene or modulating expression of a protein. State of the art gene therapy also encompasses manipulation of the transcriptome by harnessing RNA interference (RNAi) therapy. The delivery of nucleic acid nanomedicines on biomaterial scaffolds - gene-activated scaffolds -has shown potential for use in a variety of tissue engineering applications, but as of yet, have not reached clinical use. The current state of the art in terms of biomaterial scaffolds and delivery vector materials for gene therapy is reviewed, and the limitations of current procedures discussed. Future directions in the clinical translation of gene-activated scaffolds are also considered, with a particular focus on bone and cartilage tissue regeneration.
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Affiliation(s)
- Rosanne M Raftery
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
- Drug Delivery and Advanced Materials Research Team, School of Pharmacy, Royal College of Surgeons in Ireland, 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - David P Walsh
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
- Drug Delivery and Advanced Materials Research Team, School of Pharmacy, Royal College of Surgeons in Ireland, 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Irene Mencía Castaño
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
| | - Andreas Heise
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
| | - Garry P Duffy
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
| | - Sally-Ann Cryan
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Drug Delivery and Advanced Materials Research Team, School of Pharmacy, Royal College of Surgeons in Ireland, 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Fergal J O'Brien
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
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Urello MA, Kiick KL, Sullivan MO. Integration of growth factor gene delivery with collagen-triggered wound repair cascades using collagen-mimetic peptides. Bioeng Transl Med 2016; 1:207-219. [PMID: 27981245 PMCID: PMC5125401 DOI: 10.1002/btm2.10037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 12/11/2022] Open
Abstract
Growth factors (GFs) play vital roles in wound repair. Many GF therapies have reached clinical trials, but success has been hindered by safety concerns and a lack of efficacy. Previously, we presented an approach to produce protein factors in wound beds through localized gene delivery mediated by biomimetic peptides. Modification of polyethylenimine (PEI) DNA polyplexes with collagen-mimetic peptides (CMPs) enabled tailoring of polyplex release/retention and improved gene transfer activity in a cell-responsive manner. In this work, CMP-mediated delivery from collagen was shown to improve expression of platelet-derived growth factor-BB (PDGF-BB) and promote a diverse range of cellular processes associated with wound healing, including proliferation, extracellular matrix production, and chemotaxis. Collagens were pre-exposed to physiologically-simulating conditions (complete media, 37°C) for days to weeks prior to cell seeding to simulate the environment within typical wound dressings. In cell proliferation studies, significant increases in cell counts were demonstrated in collagen gels containing CMP-modified polyplex versus unmodified polyplex, and these effects became most pronounced following prolonged preincubation periods of greater than a week. Collagen containing CMP-modified polyplexes also induced a twofold increase in gel contraction as well as enhanced directionality and migratory activity in response to cell-secreted PDGF-BB gradients. While these PDGF-BB-triggered behaviors were observed in collagens containing unmodified polyplexes, the responses withstood much longer preincubation periods in CMP-modified polyplex samples (10 days vs. <5 days). Furthermore, enhanced closure rates in an in vitro wound model suggested that CMP-based PDGF-BB delivery may have utility in actual wound repair and other regenerative medicine applications.
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Affiliation(s)
- Morgan A. Urello
- Dept. of Chemical and Biomolecular EngineeringUniversity of DelawareNewarkDE19716
| | - Kristi L. Kiick
- Dept. of Material Science and EngineeringUniversity of DelawareNewarkDE19716
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Levingstone TJ, Ramesh A, Brady RT, Brama PA, Kearney C, Gleeson JP, O'Brien FJ. Cell-free multi-layered collagen-based scaffolds demonstrate layer specific regeneration of functional osteochondral tissue in caprine joints. Biomaterials 2016; 87:69-81. [DOI: 10.1016/j.biomaterials.2016.02.006] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 01/31/2016] [Accepted: 02/04/2016] [Indexed: 12/24/2022]
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Ong SM, Biswas SK, Wong SC. MicroRNA-mediated immune modulation as a therapeutic strategy in host-implant integration. Adv Drug Deliv Rev 2015; 88:92-107. [PMID: 26024977 DOI: 10.1016/j.addr.2015.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 05/05/2015] [Accepted: 05/21/2015] [Indexed: 12/29/2022]
Abstract
The concept of implanting an artificial device into the human body was once the preserve of science fiction, yet this approach is now often used to replace lost or damaged biological structures in human patients. However, assimilation of medical devices into host tissues is a complex process, and successful implant integration into patients is far from certain. The body's immediate response to a foreign object is immune-mediated reaction, hence there has been extensive research into biomaterials that can reduce or even ablate anti-implant immune responses. There have also been attempts to embed or coat anti-inflammatory drugs and pro-regulatory molecules onto medical devices with the aim of preventing implant rejection by the host. In this review, we summarize the key immune mediators of medical implant reaction, and we evaluate the potential of microRNAs to regulate these processes to promote wound healing, and prolong host-implant integration.
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Affiliation(s)
- Siew-Min Ong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos Building, Level 4, Biopolis, Singapore 138648, Singapore
| | - Subhra K Biswas
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos Building, Level 4, Biopolis, Singapore 138648, Singapore
| | - Siew-Cheng Wong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos Building, Level 4, Biopolis, Singapore 138648, Singapore.
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O'Leary C, Gilbert JL, O'Dea S, O'Brien FJ, Cryan SA. Respiratory Tissue Engineering: Current Status and Opportunities for the Future. TISSUE ENGINEERING PART B-REVIEWS 2015; 21:323-44. [PMID: 25587703 DOI: 10.1089/ten.teb.2014.0525] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Currently, lung disease and major airway trauma constitute a major global healthcare burden with limited treatment options. Airway diseases such as chronic obstructive pulmonary disease and cystic fibrosis have been identified as the fifth highest cause of mortality worldwide and are estimated to rise to fourth place by 2030. Alternate approaches and therapeutic modalities are urgently needed to improve clinical outcomes for chronic lung disease. This can be achieved through tissue engineering of the respiratory tract. Interest is growing in the use of airway tissue-engineered constructs as both a research tool, to further our understanding of airway pathology, validate new drugs, and pave the way for novel drug therapies, and also as regenerative medical devices or as an alternative to transplant tissue. This review provides a concise summary of the field of respiratory tissue engineering to date. An initial overview of airway anatomy and physiology is given, followed by a description of the stem cell populations and signaling processes involved in parenchymal healing and tissue repair. We then focus on the different biomaterials and tissue-engineered systems employed in upper and lower respiratory tract engineering and give a final perspective of the opportunities and challenges facing the field of respiratory tissue engineering.
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Affiliation(s)
- Cian O'Leary
- 1 Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland , Dublin, Ireland .,2 School of Pharmacy, Royal College of Surgeons in Ireland , Dublin, Ireland .,3 Advanced Materials and Bioengineering Research (AMBER) Centre, Royal College of Surgeons in Ireland and Trinity College Dublin , Dublin, Ireland
| | - Jennifer L Gilbert
- 4 Department of Biology, Institute of Immunology, University of Ireland , Maynooth, Ireland
| | - Shirley O'Dea
- 4 Department of Biology, Institute of Immunology, University of Ireland , Maynooth, Ireland
| | - Fergal J O'Brien
- 1 Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland , Dublin, Ireland .,3 Advanced Materials and Bioengineering Research (AMBER) Centre, Royal College of Surgeons in Ireland and Trinity College Dublin , Dublin, Ireland .,5 Trinity Centre of Bioengineering, Trinity College Dublin , Dublin, Ireland
| | - Sally-Ann Cryan
- 1 Tissue Engineering Research Group, Department of Anatomy, Royal College of Surgeons in Ireland , Dublin, Ireland .,2 School of Pharmacy, Royal College of Surgeons in Ireland , Dublin, Ireland .,5 Trinity Centre of Bioengineering, Trinity College Dublin , Dublin, Ireland
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Kaipel M, Schützenberger S, Hofmann AT, Ferguson J, Nau T, Redl H, Feichtinger GA. Evaluation of fibrin-based gene-activated matrices for BMP2/7 plasmid codelivery in a rat nonunion model. INTERNATIONAL ORTHOPAEDICS 2014; 38:2607-13. [PMID: 25192687 DOI: 10.1007/s00264-014-2499-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 08/06/2014] [Indexed: 11/29/2022]
Abstract
PURPOSE Treatment of large-segmental bone defects still is a challenge in clinical routine. Application of gene-activated matrices (GAMs) based on fibrin, bone morphogenic protein (BMP) 2/7 plasmids and nonviral transfection reagents (cationic polymers) could be an innovative treatment strategy to overcome this problem. The aim of this study was to determine the therapeutic efficacy of fibrin GAMs with or without additional transfection reagents for BMP2 and 7 plasmid codelivery in a femur nonunion rat model. METHODS In this experimental study, a critical-sized femoral defect was created in 27 rats. At four weeks after the surgery, animals were separated into four groups and underwent a second operation. Fibrin clots containing BMP2/7 plasmids with and without cationic polymer were implanted into the femoral defect. Fibrin clots containing recombinant human (rh) BMP2 served as positive and clots without supplement as negative controls. RESULTS At eight weeks, animals that received GAMs containing the cationic polymer and BMP2/7 plasmids showed decreased bone volume compared with animals treated with GAMs and BMP2/7 only. Application of BMP2/7 plasmids in fibrin GAMs without cationic polymer led to variable results. Animals that received rhBMP2 protein showed increased bone volume, and osseous unions were achieved in two of six animals. CONCLUSIONS Cationic polymers decrease therapeutic efficiency of fibrin GAM-based BMP2/7 plasmid codelivery in bone regeneration. Nonviral gene transfer of BMP2/7 plasmids needs alternative promoters (e.g. by sonoporation, electroporation) to produce beneficial clinical effects.
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Affiliation(s)
- Martin Kaipel
- Orthopaedic Department, Barmherzige Brüder Hospital, Johannes von Gott-Platz 1/A-7000, Eisenstadt, Austria,
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Salem AK. Recent progress on the development of gene-activated scaffolds encoding PDGF for enhanced bone regeneration. Regen Med 2014; 9:253-4. [PMID: 24935036 DOI: 10.2217/rme.14.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Current trends in bone tissue engineering. BIOMED RESEARCH INTERNATIONAL 2014; 2014:865270. [PMID: 24804256 PMCID: PMC3997160 DOI: 10.1155/2014/865270] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 03/09/2014] [Indexed: 01/20/2023]
Abstract
The development of tissue engineering and regeneration constitutes a new platform for translational medical research. Effective therapies for bone engineering typically employ the coordinated manipulation of cells, biologically active signaling molecules, and biomimetic, biodegradable scaffolds. Bone tissue engineering has become increasingly dependent on the merging of innovations from each of these fields, as they continue to evolve independently. This foreword will highlight some of the most recent advances in bone tissue engineering and regeneration, emphasizing the interconnected fields of stem cell biology, cell signaling biology, and biomaterial research. These include, for example, novel methods for mesenchymal stem cell purification, new methods of Wnt signaling pathway manipulation, and cutting edge computer assisted nanoscale design of bone scaffold materials. In the following
special issue, we sought to incorporate these diverse areas of emphasis in order to reflect current trends in the field.
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