1
|
Song Q, Zhu M, Shi Y, Smay J, Mao Y. Surface Tailoring of 3D Scaffolds to Promote Osteogenic Differentiation. ACS APPLIED BIO MATERIALS 2023; 6:891-898. [PMID: 36749952 DOI: 10.1021/acsabm.2c01036] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Customized bone scaffolds with osteogenic activities are desired for the regenerative repair of large-scale or irregularly shaped bone defects. This study developed a facile method to create osteogenic surfaces on three-dimensional (3D) printed scaffolds through coating-induced mineralization. The coating was synthesized using chemical vapor deposition of a polyelectrolyte containing oppositely charged groups. The opposite charges on the 3D scaffold played a crucial role in promoting the formation of nanoapatites without agglomeration, resulting in the retention of micro- and nanoscale pore openings needed for preosteoblasts to proliferate, differentiate, and migrate. The nanoapatite scaffold exhibited significant enhancement in osteoinductivity with a 107% increase in alkaline phosphatase expression and a 163% increase in osteocalcin activity compared to the pristine scaffold. The nanoapatite scaffold provided cues for preosteoblasts to grow along aligned features and migrate collectively. The findings of this study demonstrate the synergistic effect of oppositely charged polyelectrolytes and mineralized nanoapatites on promoting osteogenic activities on scaffold surfaces.
Collapse
Affiliation(s)
- Qing Song
- Department of Biosystems Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Mengfan Zhu
- Department of Biosystems Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Yang Shi
- Department of Materials Science and Engineering, Oklahoma State University, Tulsa, Oklahoma 74106, United States
| | - James Smay
- Department of Materials Science and Engineering, Oklahoma State University, Tulsa, Oklahoma 74106, United States
| | - Yu Mao
- Department of Biosystems Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| |
Collapse
|
2
|
Moghanian A, Cecen B, Nafisi N, Miri Z, Rosenzweig DH, Miri AK. Review of Current Literature for Vascularized Biomaterials in Dental Repair. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
3
|
Injectable pH-responsive adhesive hydrogels for bone tissue engineering inspired by the underwater attachment strategy of marine mussels. BIOMATERIALS ADVANCES 2022; 133:112606. [PMID: 35525750 PMCID: PMC9933951 DOI: 10.1016/j.msec.2021.112606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/19/2021] [Accepted: 12/07/2021] [Indexed: 11/21/2022]
Abstract
A major challenge in tissue engineering is the development of alternatives to traditional bone autografts and allografts that can regenerate critical-sized bone defects. Here we present the design of injectable pH-responsive double-crosslinked adhesive hydrogels inspired by the molecular mechanism and environmental post-processing of marine mussel adhesive. Nine adhesive hydrogel formulations were developed through the conjugation of crosslinkable catechol functional groups (DOPA) and the synthetic oligomer oligo[poly(ethylene glycol) fumarate] (OPF), varying the DOPA content (w/w%) and molecular weight (MW) of the OPF backbone to produce formulations with a range of swelling ratios, porosities, and crosslink densities. DOPA incorporation altered the surface chemistry, mechanical properties, and surface topography of hydrogels, resulting in an increase in material stiffness, slower degradation, and enhanced pre-osteoblast cell attachment and proliferation. When injected within simulated bone defects, DOPA-mediated interfacial adhesive interactions also prevented the displacement of scaffolds, an effect that was maintained even after swelling within physiological conditions. Taken together, OPF-DOPA hydrogels represent a promising new material to enhanced tissue integration and the prevention of the post-implantation migration of scaffolds that can occur due to biomechanical loading in vivo.
Collapse
|
4
|
Dikici S, Aldemir Dikici B, MacNeil S, Claeyssens F. Decellularised extracellular matrix decorated PCL PolyHIPE scaffolds for enhanced cellular activity, integration and angiogenesis. Biomater Sci 2021; 9:7297-7310. [PMID: 34617526 PMCID: PMC8547328 DOI: 10.1039/d1bm01262b] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Wound healing involves a complex series of events where cell–cell and cell-extracellular matrix (ECM) interactions play a key role. Wounding can be simple, such as the loss of the epithelial integrity, or deeper and more complex, reaching to subcutaneous tissues, including blood vessels, muscles and nerves. Rapid neovascularisation of the wounded area is crucial for wound healing as it has a key role in supplying oxygen and nutrients during the highly demanding proliferative phase and transmigration of inflammatory cells to the wound area. One approach to circumvent delayed neovascularisation is the exogenous use of pro-angiogenic factors, which is expensive, highly dose-dependent, and the delivery of them requires a very well-controlled system to avoid leaky, highly permeable and haemorrhagic blood vessel formation. In this study, we decorated polycaprolactone (PCL)-based polymerised high internal phase emulsion (PolyHIPE) scaffolds with fibroblast-derived ECM to assess fibroblast, endothelial cell and keratinocyte activity in vitro and angiogenesis in ex ovo chick chorioallantoic membrane (CAM) assays. Our results showed that the inclusion of ECM in the scaffolds increased the metabolic activity of three types of cells that play a key role in wound healing and stimulated angiogenesis in ex ovo CAM assays over 7 days. Herein, we demonstrated that fibroblast-ECM functionalised PCL PolyHIPE scaffolds appear to have great potential to be used as an active wound dressing to promote angiogenesis and wound healing. Decellularisation of in vitro generated extracellular matrix (ECM) provides an effective way to stimulate angiogenesis and wound healing.![]()
Collapse
Affiliation(s)
- Serkan Dikici
- Department of Bioengineering, Izmir Institute of Technology, Izmir, 35430, Turkey. .,Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield, S3 7HQ, UK.
| | - Betül Aldemir Dikici
- Department of Bioengineering, Izmir Institute of Technology, Izmir, 35430, Turkey. .,Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield, S3 7HQ, UK.
| | - Sheila MacNeil
- Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield, S3 7HQ, UK.
| | - Frederik Claeyssens
- Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield, S3 7HQ, UK.
| |
Collapse
|
5
|
Bullock G, Atkinson J, Gentile P, Hatton P, Miller C. Osteogenic Peptides and Attachment Methods Determine Tissue Regeneration in Modified Bone Graft Substitutes. J Funct Biomater 2021; 12:22. [PMID: 33807267 PMCID: PMC8103284 DOI: 10.3390/jfb12020022] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/18/2021] [Accepted: 03/24/2021] [Indexed: 01/01/2023] Open
Abstract
The inclusion of biofunctional molecules with synthetic bone graft substitutes has the potential to enhance tissue regeneration during treatment of traumatic bone injuries. The clinical use of growth factors has though been associated with complications, some serious. The use of smaller, active peptides has the potential to overcome these problems and provide a cost-effective, safe route for the manufacture of enhanced bone graft substitutes. This review considers the design of peptide-enhanced bone graft substitutes, and how peptide selection and attachment method determine clinical efficacy. It was determined that covalent attachment may reduce the known risks associated with growth factor-loaded bone graft substitutes, providing a predictable tissue response and greater clinical efficacy. Peptide choice was found to be critical, but even within recognised families of biologically active peptides, the configurations that appeared to most closely mimic the biological molecules involved in natural bone healing processes were most potent. It was concluded that rational, evidence-based design of peptide-enhanced bone graft substitutes offers a pathway to clinical maturity in this highly promising field.
Collapse
Affiliation(s)
- George Bullock
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; (G.B.); (J.A.); (C.M.)
| | - Joss Atkinson
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; (G.B.); (J.A.); (C.M.)
| | - Piergiorgio Gentile
- School of Engineering, Newcastle University, Stephenson Building, Newcastle upon Tyne NE1 7RU, UK;
| | - Paul Hatton
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; (G.B.); (J.A.); (C.M.)
| | - Cheryl Miller
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; (G.B.); (J.A.); (C.M.)
| |
Collapse
|
6
|
Carvalho MS, Cabral JMS, da Silva CL, Vashishth D. Bone Matrix Non-Collagenous Proteins in Tissue Engineering: Creating New Bone by Mimicking the Extracellular Matrix. Polymers (Basel) 2021; 13:polym13071095. [PMID: 33808184 PMCID: PMC8036283 DOI: 10.3390/polym13071095] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 02/06/2023] Open
Abstract
Engineering biomaterials that mimic the extracellular matrix (ECM) of bone is of significant importance since most of the outstanding properties of the bone are due to matrix constitution. Bone ECM is composed of a mineral part comprising hydroxyapatite and of an organic part of primarily collagen with the rest consisting on non-collagenous proteins. Collagen has already been described as critical for bone tissue regeneration; however, little is known about the potential effect of non-collagenous proteins on osteogenic differentiation, even though these proteins were identified some decades ago. Aiming to engineer new bone tissue, peptide-incorporated biomimetic materials have been developed, presenting improved biomaterial performance. These promising results led to ongoing research focused on incorporating non-collagenous proteins from bone matrix to enhance the properties of the scaffolds namely in what concerns cell migration, proliferation, and differentiation, with the ultimate goal of designing novel strategies that mimic the native bone ECM for bone tissue engineering applications. Overall, this review will provide an overview of the several non-collagenous proteins present in bone ECM, their functionality and their recent applications in the bone tissue (including dental) engineering field.
Collapse
Affiliation(s)
- Marta S. Carvalho
- Center for Biotechnology and Interdisciplinary Studies, Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Department of Bioengineering and iBB—Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (J.M.S.C.); (C.L.d.S.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
- Correspondence: (M.S.C.); (D.V.)
| | - Joaquim M. S. Cabral
- Department of Bioengineering and iBB—Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (J.M.S.C.); (C.L.d.S.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Cláudia L. da Silva
- Department of Bioengineering and iBB—Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (J.M.S.C.); (C.L.d.S.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Deepak Vashishth
- Center for Biotechnology and Interdisciplinary Studies, Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Correspondence: (M.S.C.); (D.V.)
| |
Collapse
|
7
|
Nielsen JJ, Low SA, Ramseier NT, Hadap RV, Young NA, Wang M, Low PS. Analysis of the bone fracture targeting properties of osteotropic ligands. J Control Release 2021; 329:570-584. [PMID: 33031877 DOI: 10.1016/j.jconrel.2020.09.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 09/21/2020] [Accepted: 09/27/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE Although more than 18,000,000 fractures occur each year in the US, methods to promote fracture healing still rely primarily on fracture stabilization, with use of bone anabolic agents to accelerate fracture repair limited to rare occasions when the agent can be applied to the fracture surface. Because management of broken bones could be improved if bone anabolic agents could be continuously applied to a fracture over the entire course of the healing process, we undertook to identify strategies that would allow selective concentration of bone anabolic agents on a fracture surface following systemic administration. Moreover, because hydroxyapatite is uniquely exposed on a broken bone, we searched for molecules that would bind with high affinity and specificity for hydroxyapatite. We envisioned that by conjugating such osteotropic ligands to a bone anabolic agent, we could acquire the ability to continuously stimulate fracture healing. RESULTS Although bisphosphonates and tetracyclines were capable of localizing small amounts of peptidic payloads to fracture surfaces 2-fold over healthy bone, their specificities and capacities for drug delivery were significantly inferior to subsequent other ligands, and were therefore considered no further. In contrast, short oligopeptides of acidic amino acids were found to localize a peptide payload to a bone fracture 91.9 times more than the control untargeted peptide payload. Furthermore acidic oligopeptides were observed to be capable of targeting all classes of peptides, including hydrophobic, neutral, cationic, anionic, short oligopeptides, and long polypeptides. We further found that highly specific bone fracture targeting of multiple peptidic cargoes can be achieved by subcutaneous injection of the construct. CONCLUSIONS Using similar constructs, we anticipate that healing of bone fractures in humans that have relied on immobilization alone can be greately enhanced by continuous stimulation of bone growth using systemic administration of fracture-targeted bone anabolic agents.
Collapse
Affiliation(s)
- Jeffery J Nielsen
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States of America
| | - Stewart A Low
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Neal T Ramseier
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Rahul V Hadap
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Nicholas A Young
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States of America
| | - Mingding Wang
- Department of Chemistry, Purdue University, West Lafayette, IN, United States of America
| | - Philip S Low
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States of America; Department of Chemistry, Purdue University, West Lafayette, IN, United States of America.
| |
Collapse
|
8
|
Mu X, Shi L, Pan S, He L, Niu Y, Wang X. A Customized Self-Assembling Peptide Hydrogel-Wrapped Stem Cell Factor Targeting Pulp Regeneration Rich in Vascular-Like Structures. ACS OMEGA 2020; 5:16568-16574. [PMID: 32685822 PMCID: PMC7364552 DOI: 10.1021/acsomega.0c01266] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 06/15/2020] [Indexed: 05/27/2023]
Abstract
Pulp regeneration is to replace the inflamed/necrotic pulp tissue with regenerated pulp-like tissue to rejuvenate the teeth. Self-assembling peptide hydrogels RADA16-I (Ac-(RADA16-I)4-CONH2) can provide a three-dimensional environment for cells. The stem cell factor (SCF) plays a crucial role in homing stem cells. Combining these advantages, our study investigated the effects of SCF-RADA16-I on adhesion, proliferation, and migration of human dental pulp stem cells (DPSCs) and the angiogenesis of human umbilical vein endothelial cells (HUVECs). The β-sheet and grid structure were observed by circular dichroism (CD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Cytoskeleton staining, living cell staining, cell viability, cell migration, angiogenesis, and western blot assays were performed, and the results indicated that all the SCF groups were superior to the corresponding non-SCF groups in cell adhesion, proliferation, migration, and angiogenesis. RADA16-I provided a three-dimensional environment for DPSCs. Besides, the SCF promoted HUVECs to form more vascular-like structures and release more vascular endothelial growth factor A. In summary, the SCF-loaded RADA16-I scaffold improved adhesion, proliferation, and migration of DPSCs and the formation of more vascular-like structures of HUVECs. SCF-RADA16-I holds promise for guided pulp regeneration, and it can potentially be applied widely in tissue engineering and translational medicine in the future.
Collapse
Affiliation(s)
- Xiaodan Mu
- The
First Affiliated Hospital, Harbin Medical
University, 23 Post Street, Nangang District, Harbin, Heilongjiang 150001, China
- School
of Stomatology, Harbin Medical University, 143 Yiman Street, Nangang District, Harbin, Heilongjiang 150001, China
| | - Lei Shi
- The
First Affiliated Hospital, Harbin Medical
University, 23 Post Street, Nangang District, Harbin, Heilongjiang 150001, China
- School
of Stomatology, Harbin Medical University, 143 Yiman Street, Nangang District, Harbin, Heilongjiang 150001, China
| | - Shuang Pan
- The
First Affiliated Hospital, Harbin Medical
University, 23 Post Street, Nangang District, Harbin, Heilongjiang 150001, China
- School
of Stomatology, Harbin Medical University, 143 Yiman Street, Nangang District, Harbin, Heilongjiang 150001, China
| | - Lina He
- The
First Affiliated Hospital, Harbin Medical
University, 23 Post Street, Nangang District, Harbin, Heilongjiang 150001, China
- School
of Stomatology, Harbin Medical University, 143 Yiman Street, Nangang District, Harbin, Heilongjiang 150001, China
| | - Yumei Niu
- The
First Affiliated Hospital, Harbin Medical
University, 23 Post Street, Nangang District, Harbin, Heilongjiang 150001, China
- School
of Stomatology, Harbin Medical University, 143 Yiman Street, Nangang District, Harbin, Heilongjiang 150001, China
| | - Xiumei Wang
- Department
of Materials Science and Engineering, State Key Laboratory of New
Ceramics and Fine Processing, Tsinghua University, 30 Shuangqing Road, Haidian District, Beijing 100084, China
| |
Collapse
|
9
|
Geng Z, Yu Y, Li Z, Ma L, Zhu S, Liang Y, Cui Z, Wang J, Yang X, Liu C. miR-21 promotes osseointegration and mineralization through enhancing both osteogenic and osteoclastic expression. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110785. [DOI: 10.1016/j.msec.2020.110785] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 01/02/2020] [Accepted: 02/26/2020] [Indexed: 01/08/2023]
|
10
|
Gaihre B, Liu X, Lee Miller A, Yaszemski M, Lu L. Poly(Caprolactone Fumarate) and Oligo[Poly(Ethylene Glycol) Fumarate]: Two Decades of Exploration in Biomedical Applications. POLYM REV 2020. [DOI: 10.1080/15583724.2020.1758718] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bipin Gaihre
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - A. Lee Miller
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Michael Yaszemski
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| |
Collapse
|
11
|
Aldemir Dikici B, Reilly GC, Claeyssens F. Boosting the Osteogenic and Angiogenic Performance of Multiscale Porous Polycaprolactone Scaffolds by In Vitro Generated Extracellular Matrix Decoration. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12510-12524. [PMID: 32100541 PMCID: PMC7146758 DOI: 10.1021/acsami.9b23100] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 02/26/2020] [Indexed: 05/05/2023]
Abstract
Tissue engineering (TE)-based bone grafts are favorable alternatives to autografts and allografts. Both biochemical properties and the architectural features of TE scaffolds are crucial in their design process. Synthetic polymers are attractive biomaterials to be used in the manufacturing of TE scaffolds, due to various advantages, such as being relatively inexpensive, enabling precise reproducibility, possessing tunable mechanical/chemical properties, and ease of processing. However, such scaffolds need modifications to improve their limited interaction with biological tissues. Structurally, multiscale porosity is advantageous over single-scale porosity; therefore, in this study, we have considered two key points in the design of a bone repair material; (i) manufacture of multiscale porous scaffolds made of photocurable polycaprolactone (PCL) by a combination of emulsion templating and three-dimensional (3D) printing and (ii) decoration of these scaffolds with the in vitro generated bone-like extracellular matrix (ECM) to create biohybrid scaffolds that have improved biological performance compared to PCL-only scaffolds. Multiscale porous scaffolds were fabricated, bone cells were cultured on them, and then they were decellularized. The biological performance of these constructs was tested in vitro and in vivo. Mesenchymal progenitors were seeded on PCL-only and biohybrid scaffolds. Cells not only showed improved attachment on biohybrid scaffolds but also exhibited a significantly higher rate of cell growth and osteogenic activity. The chick chorioallantoic membrane (CAM) assay was used to explore the angiogenic potential of the biohybrid scaffolds. The CAM assay indicated that the presence of the in vitro generated ECM on polymeric scaffolds resulted in higher angiogenic potential and a high degree of tissue infiltration. This study demonstrated that multiscale porous biohybrid scaffolds present a promising approach to improve bioactivity, encourage precursors to differentiate into mature bones, and to induce angiogenesis.
Collapse
Affiliation(s)
- Betül Aldemir Dikici
- Department
of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, United Kingdom
- Department
of Materials Science and Engineering, INSIGNEO Institute for In Silico
Medicine, University of Sheffield, The Pam Liversidge Building, Sheffield S1 3JD, United Kingdom
| | - Gwendolen C. Reilly
- Department
of Materials Science and Engineering, INSIGNEO Institute for In Silico
Medicine, University of Sheffield, The Pam Liversidge Building, Sheffield S1 3JD, United Kingdom
| | - Frederik Claeyssens
- Department
of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, United Kingdom
- Department
of Materials Science and Engineering, INSIGNEO Institute for In Silico
Medicine, University of Sheffield, The Pam Liversidge Building, Sheffield S1 3JD, United Kingdom
| |
Collapse
|
12
|
Jurczak P, Witkowska J, Rodziewicz-Motowidło S, Lach S. Proteins, peptides and peptidomimetics as active agents in implant surface functionalization. Adv Colloid Interface Sci 2020; 276:102083. [PMID: 31887572 DOI: 10.1016/j.cis.2019.102083] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/09/2019] [Accepted: 12/09/2019] [Indexed: 12/14/2022]
Abstract
The recent impact of implants on improving the human life quality has been enormous. During the past two decades we witnessed major advancements in both material and structural development of implants. They were driven mainly by the increasing patients' demand and the need to address the major issues that come along with the initially underestimated complexity of the bone-implant interface. While both, the materials and design of implants reached a certain, balanced state, recent years brought a shift in focus towards the bone-implant interface as the weakest link in the increasing implant long-term usability. As a result, several approaches were developed. They aimed at influencing and enhancing the implant osseointegration and its proper behavior when under load and stress. With this review, we would like to discuss the recent advancements in the field of implant surface modifications, emphasizing the importance of chemical methods, focusing on proteins, peptides and peptidomimetics as promising agents for titanium surface coatings.
Collapse
|
13
|
Rasi Ghaemi S, Delalat B, Cavallaro A, Mierczynska‐Vasilev A, Vasilev K, Voelcker NH. Differentiation of Rat Mesenchymal Stem Cells toward Osteogenic Lineage on Extracellular Matrix Protein Gradients. Adv Healthc Mater 2019; 8:e1900595. [PMID: 31328896 DOI: 10.1002/adhm.201900595] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/08/2019] [Indexed: 12/15/2022]
Abstract
This report addresses the issue of optimizing extracellular matrix protein density required to support osteogenic lineage differentiation of mesenchymal stem cells (MSCs) by culturing MSCs on surface-bound density gradients of immobilized collagen type I (COL1) and osteopontin (OPN). A chemical surface gradient is prepared by tailoring the surface chemical composition from high hydroxyl groups to aldehyde groups using a diffusion-controlled plasma polymerization technique. Osteogenesis on the gradient surface is determined by immunofluorescence staining against Runx2 as an early marker and by staining of calcium phosphate deposits as a late stage differentiation marker. The Runx2 intensity and calcified area increase with increasing COL1 density up to a critical value corresponding to 124.2 ng cm-2 , above which cell attachment and differentiation do not rise further, while this critical value for OPN is 19.0 ng cm-2 . This gradient approach may facilitate the screening of an optimal biomolecule surface density on tissue-engineered scaffolds, implants, or tissue culture ware to obtain the desired cell response, and may generate opportunities for more cost-effective regenerative medicine.
Collapse
Affiliation(s)
- Soraya Rasi Ghaemi
- Future Industries InstituteUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
| | - Bahman Delalat
- Future Industries InstituteUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
- ManufacturingCommonwealth Scientific and Industrial Research Organization (CSIRO) Clayton Melbourne 3168 Victoria Australia
- Drug DeliveryDisposition and DynamicsMonash Institute of Pharmaceutical SciencesMonash University Parkville Melbourne 3052 Victoria Australia
- Department of Mechanical and Aerospace EngineeringMonash University Clayton Melbourne 3168 Victoria Australia
| | - Alex Cavallaro
- Future Industries InstituteUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
| | - Agnieszka Mierczynska‐Vasilev
- Future Industries InstituteUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
- School of EngineeringUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
- The Australian Wine Research InstituteWaite Precinct Hartley Grove cnr Paratoo Road, Urrbrae Adelaide 5064 South Australia Australia
| | - Krasimir Vasilev
- Future Industries InstituteUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
- School of EngineeringUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
| | - Nicolas H. Voelcker
- Future Industries InstituteUniversity of South Australia Mawson Lakes Adelaide 5095 South Australia Australia
- ManufacturingCommonwealth Scientific and Industrial Research Organization (CSIRO) Clayton Melbourne 3168 Victoria Australia
- Drug DeliveryDisposition and DynamicsMonash Institute of Pharmaceutical SciencesMonash University Parkville Melbourne 3052 Victoria Australia
- Victorian Node of the Australian National Fabrication FacilityMelbourne Center for Nanofabrication Clayton Melbourne 3168 Victoria Australia
| |
Collapse
|
14
|
Liao J, Wu S, Li K, Fan Y, Dunne N, Li X. Peptide‐modified bone repair materials: Factors influencing osteogenic activity. J Biomed Mater Res A 2019; 107:1491-1512. [DOI: 10.1002/jbm.a.36663] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/29/2019] [Accepted: 02/14/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Jie Liao
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
| | - Shuai Wu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
| | - Kun Li
- State Key Laboratory of Powder MetallurgyCentral South University Changsha 410083 China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
- Beijing Advanced Innovation Center for Biomedical EngineeringBeihang University Beijing 100083 China
| | - Nicholas Dunne
- Centre for Medical Engineering ResearchSchool of Mechanical and Manufacturing Engineering, Dublin City University Stokes Building, Collins Avenue, Dublin 9 Ireland
| | - Xiaoming Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
- Beijing Advanced Innovation Center for Biomedical EngineeringBeihang University Beijing 100083 China
| |
Collapse
|
15
|
Hosseini S, Naderi-Manesh H, Vali H, Baghaban Eslaminejad M, Azam Sayahpour F, Sheibani S, Faghihi S. Contribution of osteocalcin-mimetic peptide enhances osteogenic activity and extracellular matrix mineralization of human osteoblast-like cells. Colloids Surf B Biointerfaces 2019; 173:662-671. [DOI: 10.1016/j.colsurfb.2018.10.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/22/2018] [Accepted: 10/14/2018] [Indexed: 12/20/2022]
|
16
|
Bicho D, Ajami S, Liu C, Reis RL, Oliveira JM. Peptide-biofunctionalization of biomaterials for osteochondral tissue regeneration in early stage osteoarthritis: challenges and opportunities. J Mater Chem B 2019; 7:1027-1044. [DOI: 10.1039/c8tb03173h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Osteoarthritis is a degenerative joint disease characterized by the progressive deterioration of articular cartilage, synovial inflammation and changes in periarticular and subchondral bone, being a leading cause of disability.
Collapse
Affiliation(s)
- D. Bicho
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra
- Guimarães
- Portugal
- ICVS/3B's – PT Government Associate Laboratory
- Braga/Guimarães
| | - S. Ajami
- Institute of Orthopaedics and Musculo-Skeletal Sci, University College London, Royal National Orthopaedic Hospital
- Stanmore
- UK
| | - C. Liu
- Institute of Orthopaedics and Musculo-Skeletal Sci, University College London, Royal National Orthopaedic Hospital
- Stanmore
- UK
| | - R. L. Reis
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra
- Guimarães
- Portugal
- ICVS/3B's – PT Government Associate Laboratory
- Braga/Guimarães
| | - J. M. Oliveira
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra
- Guimarães
- Portugal
- ICVS/3B's – PT Government Associate Laboratory
- Braga/Guimarães
| |
Collapse
|
17
|
Fra-2 Expression in Osteoblasts Regulates Systemic Inflammation and Lung Injury through Osteopontin. Mol Cell Biol 2018; 38:MCB.00022-18. [PMID: 30181393 DOI: 10.1128/mcb.00022-18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/20/2018] [Indexed: 02/05/2023] Open
Abstract
Inflammatory responses require mobilization of innate immune cells from the bone marrow. The functionality of this process depends on the state of the bone marrow microenvironment. We therefore hypothesized that molecular changes in osteoblasts, which are essential stromal cells of the bone marrow microenvironment, influence the inflammatory response. Here, we show that osteoblast-specific expression of the AP-1 transcription factor Fra-2 (Fra-2Ob-tet) induced a systemic inflammatory state with infiltration of neutrophils and proinflammatory macrophages into the spleen and liver as well as increased levels of proinflammatory cytokines, such as interleukin-1β (IL-1β), IL-6, and granulocyte-macrophage colony-stimulating factor (GM-CSF). By in vivo inhibition of osteopontin (OPN) in Fra-2Ob-tet mice, we demonstrated that this process was dependent on OPN expression, which mediates alterations of the bone marrow niche. OPN expression was transcriptionally enhanced by Fra-2 and stimulated mesenchymal stem cell (MSC) expansion. Furthermore, in a murine lung injury model, Fra-2Ob-tet mice showed increased inflammatory responses and more severe disease features via an enhanced and sustained inflammatory response to lipopolysaccharide (LPS). Our findings demonstrate for the first time that molecular changes in osteoblasts influence the susceptibility to inflammation by altering evasion of innate immune cells from the bone marrow space.
Collapse
|
18
|
Carvalho MS, Poundarik AA, Cabral JMS, da Silva CL, Vashishth D. Biomimetic matrices for rapidly forming mineralized bone tissue based on stem cell-mediated osteogenesis. Sci Rep 2018; 8:14388. [PMID: 30258220 PMCID: PMC6158243 DOI: 10.1038/s41598-018-32794-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 09/12/2018] [Indexed: 01/14/2023] Open
Abstract
Bone regeneration, following fracture, relies on autologous and allogenic bone grafts. However, majority of fracture population consists of older individuals with poor quality bone associated with loss and/or modification of matrix proteins critical for bone formation and mineralization. Allografts suffer from same limitations and carry the risk of delayed healing, infection, immune rejection and eventual fracture. In this work, we apply a synergistic biomimetic strategy to develop matrices that rapidly form bone tissue - a critical aspect of fracture healing of weight bearing bones. Collagen matrices, enhanced with two selected key matrix proteins, osteocalcin (OC) and/or osteopontin (OPN), increased the rate and quantity of synthesized bone matrix by increasing mesenchymal stem/stromal cell (MSC) proliferation, accelerating osteogenic differentiation, enhancing angiogenesis and showing a sustained bone formation response from MSC obtained from a variety of human tissue sources (marrow, fat and umbilical cord). In vivo assessment of OC/OPN mineralized scaffolds in a critical sized-defect rabbit long-bone model did not reveal any foreign body reaction while bone tissue was being formed. We demonstrate a new biomimetic strategy to rapidly form mineralized bone tissue and secure a sustained bone formation response by MSC from multiple sources, thus facilitating faster patient recovery and treatment of non-union fractures in aging and diseased population. Acellular biomimetic matrices elicit bone regeneration response from MSC, obtained from multiple tissue sources, and can be used in variety of scaffolds and made widely available.
Collapse
Affiliation(s)
- Marta S Carvalho
- Center for Biotechnology and Interdisciplinary Studies, Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA.,Department of Bioengineering and iBB - Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Atharva A Poundarik
- Center for Biotechnology and Interdisciplinary Studies, Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - Joaquim M S Cabral
- Department of Bioengineering and iBB - Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.,The Discoveries Centre for Regenerative and Precision Medicine, Lisbon Campus, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Cláudia L da Silva
- Department of Bioengineering and iBB - Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.,The Discoveries Centre for Regenerative and Precision Medicine, Lisbon Campus, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Deepak Vashishth
- Center for Biotechnology and Interdisciplinary Studies, Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA.
| |
Collapse
|
19
|
Zhou J, Yang X, Liu W, Wang C, Shen Y, Zhang F, Zhu H, Sun H, Chen J, Lam J, Mikos AG, Wang C. Injectable OPF/graphene oxide hydrogels provide mechanical support and enhance cell electrical signaling after implantation into myocardial infarct. Theranostics 2018; 8:3317-3330. [PMID: 29930732 PMCID: PMC6010993 DOI: 10.7150/thno.25504] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 04/16/2018] [Indexed: 12/22/2022] Open
Abstract
After myocardial infarction (MI), the scar tissue contributes to ventricular dysfunction by electrically uncoupling viable cardiomyocytes in the infarct region. Injection of a conductive hydrogel could not only provide mechanical support to the infarcted region, but also synchronize contraction and restore ventricular function by electrically connecting isolated cardiomyocytes to intact tissue. Methods: We created a conductive hydrogel by introducing graphene oxide (GO) nanoparticles into oligo(poly(ethylene glycol) fumarate) (OPF) hydrogels. The hydrogels were characterized by AFM and electrochemistry workstation. A rat model of myocardial infarction was used to investigate the ability of OPF/GO to improve cardiac electrical propagation in the injured heart in vivo. Echocardiography (ECHO) was used to evaluate heart function 4 weeks after MI. Ca2+ imaging was used to visualize beating cardiomyocytes (CMs). Immunofluorescence staining was used to visualize the expression of cardiac-specific markers. Results: OPF/GO hydrogels had semiconductive properties that were lacking in pure OPF. In addition, the incorporation of GO into OPF hydrogels could improve cell attachment in vitro. Injection of OPF/GO 4 weeks after myocardial infarction in rats enhanced the Ca2+ signal conduction of cardiomyocytes in the infarcted region in comparison with PBS or OPF alone. Moreover, the injection of OPF/GO hydrogel into the infarct region enhanced the generation of cytoskeletal structure and intercalated disc assembly. Echocardiography analysis showed improvement in load-dependent ejection fraction/fractional shortening of heart function 4 weeks after injection. Conclusions: We prepared a conductive hydrogel (OPF/GO) that provide mechanical support and biological conduction in vitro and in vivo. We found that injected OPF/GO hydrogels can provide mechanical support and electric connection between healthy myocardium and the cardiomyocytes in the scar via activating the canonical Wnt signal pathway, thus upregulating the generation of Cx43 and gap junction associated proteins. Injection of OPF/GO hydrogel maintained better heart function after myocardial infarction than the injection of a nonconductive polymer.
Collapse
|
20
|
Independent control of matrix adhesiveness and stiffness within a 3D self-assembling peptide hydrogel. Acta Biomater 2018; 70:110-119. [PMID: 29410241 DOI: 10.1016/j.actbio.2018.01.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 01/15/2018] [Accepted: 01/24/2018] [Indexed: 12/30/2022]
Abstract
A cell's insoluble microenvironment has increasingly been shown to exert influence on its function. In particular, matrix stiffness and adhesiveness strongly impact behaviors such as cell spreading and differentiation, but materials that allow for independent control of these parameters within a fibrous, stromal-like microenvironment are very limited. In the current work, we devise a self-assembling peptide (SAP) system that facilitates user-friendly control of matrix stiffness and RGD (Arg-Gly-Asp) concentration within a hydrogel possessing a microarchitecture similar to stromal extracellular matrix. In this system, the RGD-modified SAP sequence KFE-RGD and the scrambled sequence KFE-RDG can be directly swapped for one another to change RGD concentration at a given matrix stiffness and total peptide concentration. Stiffness is controlled by altering total peptide concentration, and the unmodified base peptide KFE-8 can be included to further increase this stiffness range due to its higher modulus. With this tunable system, we demonstrate that human mesenchymal stem cell morphology and differentiation are influenced by both gel stiffness and the presence of functional cell binding sites in 3D culture. Specifically, cells 24 hours after encapsulation were only able to spread out in stiffer matrices containing KFE-RGD. Upon addition of soluble adipogenic factors, soft gels facilitated the greatest adipogenesis as determined by the presence of lipid vacuoles and PPARγ-2 expression, while increasing KFE-RGD concentration at a given stiffness had a negative effect on adipogenesis. This three-component hydrogel system thus allows for systematic investigation of matrix stiffness and RGD concentration on cell behavior within a fibrous, three-dimensional matrix. STATEMENT OF SIGNIFICANCE Physical cues from a cell's surrounding environment-such as the density of cell binding sites and the stiffness of the surrounding material-are increasingly being recognized as key regulators of cell function. Currently, most synthetic biomaterials used to independently tune these parameters lack the fibrous structure characteristic of stromal extracellular matrix, which can be important to cells naturally residing within stromal tissues. In this manuscript, we describe a 3D hydrogel encapsulation system that provides user-friendly control over matrix stiffness and binding site concentration within the context of a stromal-like microarchitecture. Binding site concentration and gel stiffness both influenced cell spreading and differentiation, highlighting the utility of this system to study the independent effects of these material properties on cell function.
Collapse
|
21
|
Feng L, Li Y, Zeng W, Xia B, Zhou D, Zhou J. Enhancing effects of basic fibroblast growth factor and fibronectin on osteoblast adhesion to bone scaffolds for bone tissue engineering through extracellular matrix-integrin pathway. Exp Ther Med 2017; 14:6087-6092. [PMID: 29285162 DOI: 10.3892/etm.2017.5320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 03/10/2017] [Indexed: 10/18/2022] Open
Abstract
The present study aimed to investigate the effects of basic fibroblast growth factor (bFGF) and fibronectin (FN) on adhesion of osteoblasts seeded into bio-derived bone scaffolds. Rat calvarial osteoblasts were separated and their osteogenic phenotypes were determined by staining for alkaline phosphatase as well as alizarin red staining. The bio-derived bone scaffolds were prepared from the metaphysis of porcine femur and their physicochemical properties were assessed by scanning electron microscopy (SEM) and X-ray diffraction analysis. An MTT assay was used to detect the effects of bFGF and FN on osteoblast adhesion or proliferation on cell/scaffold constructs through blocking the extracellular matrix FN-integrin pathway by the Gly-Arg-Gly-Asp-Ser (GRGDS) peptide. Western blot analysis was used to measure the β1 integrin levels. Based on the adhesion of osteoblasts stimulated by various concentrations of bFGF (0.1, 1, 10 and 100 ng/ml) on bio-derived bone scaffolds modified by various concentrations of FN (0.1, 1, 10 and 100 µg/ml), the cell/scaffold constructs were divided into four groups: i) Control, non-stimulated and non-modified group; ii) 10 µg/ml FN-modified group; iii) 100 ng/ml bFGF-stimulated group; iv) 10 µg/ml FN + 100 ng/ml bFGF group. Cell proliferation curves acquired by MTT assay and micrographs obtained by SEM showed that the combination of bFGF and FN significantly improved cell adhesion, particularly in the 10 µg/ml FN + 100 ng/ml bFGF group vs. the other groups, and the effect on cell adhesion was inhibited by 1 mmol/l GRGDS peptide through the FN-integrin pathway. Western blot results showed that the combination of bFGF and FN significantly enhanced β1 integrin expression levels. These results suggested that osteoblasts stimulated by 100 ng/ml bFGF and bio-derived bone materials modified by 10 µg/ml FN should be combined to be applied in the bone tissue engineering.
Collapse
Affiliation(s)
- Li Feng
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Yehong Li
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Wenchao Zeng
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Bo Xia
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Dongsheng Zhou
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250014, P.R. China
| | - Jing Zhou
- Department of Obstetrics and Gynecology, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| |
Collapse
|
22
|
Cho IS, Ooya T. An injectable and self-healing hydrogel for spatiotemporal protein release via fragmentation after passing through needles. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 29:145-159. [DOI: 10.1080/09205063.2017.1405573] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ik Sung Cho
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan
| | - Tooru Ooya
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan
| |
Collapse
|
23
|
Song Y, Zhang C, Wang P, Wang L, Bao C, Weir MD, Reynolds MA, Ren K, Zhao L, Xu HHK. Engineering bone regeneration with novel cell-laden hydrogel microfiber-injectable calcium phosphate scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:895-905. [PMID: 28415545 DOI: 10.1016/j.msec.2017.02.158] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 02/26/2017] [Accepted: 02/27/2017] [Indexed: 02/05/2023]
Abstract
Cell-based tissue engineering is promising to create living functional tissues for bone regeneration. The implanted cells should be evenly distributed in the scaffold, be fast-released to the defect and maintain high viability in order to actively participate in the regenerative process. Herein, we report an injectable calcium phosphate cement (CPC) scaffold containing cell-encapsulating hydrogel microfibers with desirable degradability that could deliver cells in a timely manner and maintain cell viability. Microfibers were synthesized using partially-oxidized alginate with various concentrations (0-0.8%) of fibrinogen to optimize the degradation rate of the alginate-fibrin microfibers (Alg-Fb MF). A fibrin concentration of 0.4% in Alg-Fb MF resulted in the greatest enhancement of cell migration, release and proliferation. Interestingly, a significant amount of cell-cell contact along the long-axis of the microfibers was established in Alg-0.4%Fb MF as early as day 2. The injectable tissue engineered construct for bone reconstruct was fabricated by mixing the fast-degradable Alg-0.4%Fb MF with CPC paste at 1:1 volume ratio. In vitro study showed that cells re-collected from the construct maintained good viability and osteogenic potentials. In vivo study demonstrated that the hBMSC-encapsulated CPC-MF tissue engineered construct displayed a robust capacity for bone regeneration. At 12weeks after implantation, osseous bridge in the rat mandibular defect was observed in CPC-MF-hBMSCs group with a new bone area fraction of (42.1±7.8) % in the defects, which was >3-fold that of the control group. The novel tissue-engineered construct presents an excellent prospect for a wide range of dental, craniofacial and orthopedic applications.
Collapse
Affiliation(s)
- Yang Song
- Department of Prosthodontics, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, China; Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Chi Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Ping Wang
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Lin Wang
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; VIP Integrated Department, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130011, China
| | - Chunyun Bao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Michael D Weir
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mark A Reynolds
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Ke Ren
- Department of Neural and Pain Sciences, School of Dentistry, Program in Neuroscience, University of Maryland, Baltimore, MD 21201, USA
| | - Liang Zhao
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Orthopaedic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China.
| | - Hockin H K Xu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| |
Collapse
|
24
|
Song M, Huo H, Cao Z, Han Y, Gao L. Aluminum Trichloride Inhibits the Rat Osteoblasts Mineralization In Vitro. Biol Trace Elem Res 2017; 175:186-193. [PMID: 27260532 DOI: 10.1007/s12011-016-0761-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 05/24/2016] [Indexed: 12/01/2022]
Abstract
Aluminum (Al) is an accumulative toxic metal. Excessive Al accumulation inhibits osteoblasts mineralization and induces osteoporosis. However, the inhibition mechanism of Al on the mineralization is not fully understood. Thus, in this study, the rat osteoblasts were cultured and exposed to 0 mmol L-1 (control group, CG) and 0.52 mmol L-1 aluminum trichloride (AlCl3, treatment group, TG) for 7, 14, and 21 days, respectively. We found that mineralized matrix nodules, the activity of bone alkaline phosphatase, the concentration of extracellular calcium, the mRNA expression of type-I collagen, the mRNA and protein expressions of osteopontin, osteocalcin, and bone sialoprotein were all decreased, while the concentration of extracellular phosphorus was increased in TG compared with CG with time prolonged. Taken together, these results indicated that AlCl3 inhibited osteoblasts mineralization in vitro.
Collapse
Affiliation(s)
- Miao Song
- College of Veterinary Medicine, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, China
| | - Hui Huo
- College of Veterinary Medicine, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, China
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, China
| | - Zheng Cao
- College of Veterinary Medicine, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, China
| | - Yanfei Han
- College of Veterinary Medicine, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, China
| | - Li Gao
- College of Veterinary Medicine, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, China.
| |
Collapse
|
25
|
Visser R, Rico-Llanos GA, Pulkkinen H, Becerra J. Peptides for bone tissue engineering. J Control Release 2016; 244:122-135. [PMID: 27794492 DOI: 10.1016/j.jconrel.2016.10.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/21/2016] [Accepted: 10/23/2016] [Indexed: 01/07/2023]
Abstract
Molecular signals in the form of growth factors are the main modulators of cell behavior. However, the use of growth factors in tissue engineering has several drawbacks, including their costs, difficult production, immunogenicity and short half-life. Furthermore, many of them are pleiotropic and, since a single growth factor can have different active domains, their effect is not always fully controllable. A very interesting alternative that has recently emerged is the use of biomimetic peptides. Sequences derived from the active domains of soluble or extracellular matrix proteins can be used to functionalize the biomaterials used as scaffolds for new tissue growth to either direct the attachment of cells or to be released as soluble ligands. Since these short peptides can be easily designed and cost-effectively synthesized in vitro, their use has opened up a world of new opportunities to obtain cheaper and more effective implants for regenerative medicine strategies. In this extensive review we will go through many of the most important peptides with potential interest for bone tissue engineering, not limiting to those that only mediate cell adhesion or induce the osteogenic differentiation of progenitor cells, but also focusing on those that direct angiogenesis because of its close relation with bone formation.
Collapse
Affiliation(s)
- Rick Visser
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, (CIBER-BBN), Malaga, Spain; Department of Cell Biology, Genetics and Physiology, University of Malaga, IBIMA, Spain; BIONAND, Andalusian Center for Nanomedicine and Biotechnology, Junta de Andalucia, University of Malaga, Spain.
| | - Gustavo A Rico-Llanos
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, (CIBER-BBN), Malaga, Spain; Department of Cell Biology, Genetics and Physiology, University of Malaga, IBIMA, Spain; BIONAND, Andalusian Center for Nanomedicine and Biotechnology, Junta de Andalucia, University of Malaga, Spain
| | - Hertta Pulkkinen
- BIONAND, Andalusian Center for Nanomedicine and Biotechnology, Junta de Andalucia, University of Malaga, Spain; Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Jose Becerra
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, (CIBER-BBN), Malaga, Spain; Department of Cell Biology, Genetics and Physiology, University of Malaga, IBIMA, Spain; BIONAND, Andalusian Center for Nanomedicine and Biotechnology, Junta de Andalucia, University of Malaga, Spain
| |
Collapse
|
26
|
Amso Z, Cornish J, Brimble MA. Short Anabolic Peptides for Bone Growth. Med Res Rev 2016; 36:579-640. [DOI: 10.1002/med.21388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 01/24/2016] [Accepted: 02/15/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Zaid Amso
- School of Chemical Sciences; The University of Auckland, 23 Symonds St; Auckland 1142 New Zealand
| | - Jillian Cornish
- Department of Medicine; The University of Auckland; Auckland 1010 New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences; The University of Auckland, 23 Symonds St; Auckland 1142 New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, School of Biological Sciences; The University of Auckland; Auckland 1142 New Zealand
| |
Collapse
|
27
|
Vo TN, Shah SR, Lu S, Tatara AM, Lee EJ, Roh TT, Tabata Y, Mikos AG. Injectable dual-gelling cell-laden composite hydrogels for bone tissue engineering. Biomaterials 2015; 83:1-11. [PMID: 26773659 DOI: 10.1016/j.biomaterials.2015.12.026] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 12/15/2015] [Accepted: 12/19/2015] [Indexed: 02/07/2023]
Abstract
The present work investigated the osteogenic potential of injectable, dual thermally and chemically gelable composite hydrogels for mesenchymal stem cell (MSC) delivery in vitro and in vivo. Composite hydrogels comprising copolymer macromers of N-isopropylacrylamide were fabricated through the incorporation of gelatin microparticles (GMPs) as enzymatically digestible porogens and sites for cellular attachment. High and low polymer content hydrogels with and without GMP loading were shown to successfully encapsulate viable MSCs and maintain their survival over 28 days in vitro. GMP incorporation was also shown to modulate alkaline phosphatase production, but enhanced hydrogel mineralization along with higher polymer content even in the absence of cells. Moreover, the regenerative capacity of 2 mm thick hydrogels with GMPs only, MSCs only, or GMPs and MSCs was evaluated in vivo in an 8 mm rat critical size cranial defect for 4 and 12 weeks. GMP incorporation led to enhanced bony bridging and mineralization within the defect at each timepoint, and direct bone-implant contact as determined by microcomputed tomography and histological scoring, respectively. Encapsulation of both GMPs and MSCs enabled hydrogel degradation leading to significant tissue infiltration and osteoid formation. The results suggest that these injectable, dual-gelling cell-laden composite hydrogels can facilitate bone ingrowth and integration, warranting further investigation for bone tissue engineering.
Collapse
Affiliation(s)
- T N Vo
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA
| | - S R Shah
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA
| | - S Lu
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA
| | - A M Tatara
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA
| | - E J Lee
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA
| | - T T Roh
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA
| | - Y Tabata
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - A G Mikos
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX, 77251-1892, USA; Department of Chemical and Biomolecular Engineering, Rice University, P.O. Box 1892, MS 362, Houston, TX, 77251-1892, USA.
| |
Collapse
|
28
|
Di Benedetto A, Brunetti G, Posa F, Ballini A, Grassi FR, Colaianni G, Colucci S, Rossi E, Cavalcanti-Adam EA, Lo Muzio L, Grano M, Mori G. Osteogenic differentiation of mesenchymal stem cells from dental bud: Role of integrins and cadherins. Stem Cell Res 2015; 15:618-628. [PMID: 26513557 DOI: 10.1016/j.scr.2015.09.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 07/25/2015] [Accepted: 09/24/2015] [Indexed: 12/30/2022] Open
Abstract
Several studies have reported the beneficial effects of mesenchymal stem cells (MSCs) in tissue repair and regeneration. New sources of stem cells in adult organisms are continuously emerging; dental tissues have been identified as a source of postnatal MSCs. Dental bud is the immature precursor of the tooth, is easy to access and we show in this study that it can yield a high number of cells with ≥95% expression of mesenchymal stemness makers and osteogenic capacity. Thus, these cells can be defined as Dental Bud Stem Cells (DBSCs) representing a promising source for bone regeneration of stomatognathic as well as other systems. Cell interactions with the extracellular matrix (ECM) and neighboring cells are critical for tissue morphogenesis and architecture; such interactions are mediated by integrins and cadherins respectively. We characterized DBSCs for the expression of these adhesion receptors and examined their pattern during osteogenic differentiation. Our data indicate that N-cadherin and cadherin-11 were expressed in undifferentiated DBSCs and their expression underwent changes during the osteogenic process (decreasing and increasing respectively), while expression of E-cadherin and P-cadherin was very low in DBSCs and did not change during the differentiation steps. Such expression pattern reflected the mesenchymal origin of DBSCs and confirmed their osteoblast-like features. On the other hand, osteogenic stimulation induced the upregulation of single subunits, αV, β3, α5, and the formation of integrin receptors α5β1 and αVβ3. DBSCs differentiation toward osteoblastic lineage was enhanced when cells were grown on fibronectin (FN), vitronectin (VTN), and osteopontin (OPN), ECM glycoproteins which contain an integrin-binding sequence, the RGD motif. In addition we established that integrin αVβ3 plays a crucial role during the commitment of MSCs to osteoblast lineage, whereas integrin α5β1 seems to be dispensable. These data suggest that functionalization of biomaterials with such ECM proteins would improve bone reconstruction therapies starting from dental stem cells.
Collapse
Affiliation(s)
- Adriana Di Benedetto
- Department of Clinical and Experimental Medicine, Medical School, University of Foggia, Italy.
| | - Giacomina Brunetti
- Section of Human Anatomy and Histology, Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | - Francesca Posa
- Department of Clinical and Experimental Medicine, Medical School, University of Foggia, Italy
| | - Andrea Ballini
- Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | - Felice Roberto Grassi
- Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | - Graziana Colaianni
- Section of Human Anatomy and Histology, Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | - Silvia Colucci
- Section of Human Anatomy and Histology, Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | - Enzo Rossi
- Private Practice, Oral and Maxillofacial Surgery, Poggio a Caiano, Florence, Italy
| | - Elisabetta A Cavalcanti-Adam
- Institute of Physical Chemistry, Department of Biophysical Chemistry
- University of Heidelberg AND Max Planck Institute for Intelligent Systems, Stuttgart, Germany
| | - Lorenzo Lo Muzio
- Department of Clinical and Experimental Medicine, Medical School, University of Foggia, Italy
| | - Maria Grano
- Section of Human Anatomy and Histology, Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | - Giorgio Mori
- Department of Clinical and Experimental Medicine, Medical School, University of Foggia, Italy
| |
Collapse
|
29
|
Watson BM, Vo TN, Tatara AM, Shah SR, Scott DW, Engel PS, Mikos AG. Biodegradable, phosphate-containing, dual-gelling macromers for cellular delivery in bone tissue engineering. Biomaterials 2015; 67:286-96. [PMID: 26232878 DOI: 10.1016/j.biomaterials.2015.07.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 07/07/2015] [Accepted: 07/10/2015] [Indexed: 10/23/2022]
Abstract
Injectable, biodegradable, dual-gelling macromer solutions were used to encapsulate mesenchymal stem cells (MSCs) within stable hydrogels when elevated to physiologic temperature. Pendant phosphate groups were incorporated in the N-isopropyl acrylamide-based macromers to improve biointegration and facilitate hydrogel degradation. The MSCs were shown to survive the encapsulation process, and live cells were detected within the hydrogels for up to 28 days in vitro. Cell-laden hydrogels were shown to undergo significant mineralization in osteogenic medium. Cell-laden and acellular hydrogels were implanted into a critical-size rat cranial defect for 4 and 12 weeks. Both cell-laden and acellular hydrogels were shown to degrade in vivo and help to facilitate bone growth into the defect. Improved bone bridging of the defect was seen with the incorporation of cells, as well as with higher phosphate content of the macromer. Furthermore, direct bone-to-hydrogel contact was observed in the majority of implants, which is not commonly seen in this model. The ability of these macromers to deliver stem cells while forming in situ and subsequently degrade while facilitating bone ingrowth into the defect makes this class of macromers a promising material for craniofacial bone tissue engineering.
Collapse
Affiliation(s)
- Brendan M Watson
- Department of Bioengineering, Rice University, Houston, TX 77030, USA
| | - Tiffany N Vo
- Department of Bioengineering, Rice University, Houston, TX 77030, USA
| | | | - Sarita R Shah
- Department of Bioengineering, Rice University, Houston, TX 77030, USA
| | - David W Scott
- Department of Statistics, Rice University, Houston, TX 77251, USA
| | - Paul S Engel
- Department of Chemistry, Rice University, Houston, TX 77251, USA
| | - Antonios G Mikos
- Department of Bioengineering, Rice University, Houston, TX 77030, USA.
| |
Collapse
|
30
|
Samorezov JE, Morlock CM, Alsberg E. Dual Ionic and Photo-Crosslinked Alginate Hydrogels for Micropatterned Spatial Control of Material Properties and Cell Behavior. Bioconjug Chem 2015; 26:1339-47. [PMID: 25799217 DOI: 10.1021/acs.bioconjchem.5b00117] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Biomaterial properties such as mechanics, degradation rate, and cell adhesivity affect cell behaviors including spreading, proliferation, and differentiation. To engineer complex tissues, it is often desirable to achieve precise spatial control over these properties. Here, methacrylated alginate (MA-ALG) was used to create hydrogels comprising a single base material with regions of different types and levels of crosslinking and subsequently different material properties. Ionic and ultraviolet light crosslinking mechanisms were combined to create dual-crosslinked hydrogels with significantly increased stiffness and decreased swelling compared to calcium-crosslinked or UV-crosslinked hydrogels. MC3T3 cells showed significantly enhanced proliferation on the surface of dual-crosslinked hydrogels compared with calcium-crosslinked hydrogels. Photomasks were then used to create patterned hydrogels with precise spatial control over regions that were only calcium-crosslinked versus dual-crosslinked. This spatial variation in crosslinking mechanism permitted local regulation of the hydrogel physical properties and alignment of cells seeded on their surface. Photomasks were also used to create hydrogels with patterned presentation of cell adhesion ligands, leading to spatial control over cell attachment and proliferation. This biomaterial system can be useful for providing patterned, instructive cues to guide cell behavior for engineering complex tissues.
Collapse
Affiliation(s)
- Julia E Samorezov
- †Department of Biomedical Engineering, ‡Department of Orthopaedic Surgery, and §National Center for Regenerative Medicine, Division of General Medical Sciences, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Colin M Morlock
- †Department of Biomedical Engineering, ‡Department of Orthopaedic Surgery, and §National Center for Regenerative Medicine, Division of General Medical Sciences, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Eben Alsberg
- †Department of Biomedical Engineering, ‡Department of Orthopaedic Surgery, and §National Center for Regenerative Medicine, Division of General Medical Sciences, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| |
Collapse
|
31
|
Driver J, Weber CE, Callaci JJ, Kothari AN, Zapf MA, Roper PM, Borys D, Franzen CA, Gupta GN, Wai PY, Zhang J, Denning MF, Kuo PC, Mi Z. Alcohol inhibits osteopontin-dependent transforming growth factor-β1 expression in human mesenchymal stem cells. J Biol Chem 2015; 290:9959-73. [PMID: 25713073 DOI: 10.1074/jbc.m114.616888] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Indexed: 12/16/2022] Open
Abstract
Alcohol (EtOH) intoxication is a risk factor for increased morbidity and mortality with traumatic injuries, in part through inhibition of bone fracture healing. Animal models have shown that EtOH decreases fracture callus volume, diameter, and biomechanical strength. Transforming growth factor β1 (TGF-β1) and osteopontin (OPN) play important roles in bone remodeling and fracture healing. Mesenchymal stem cells (MSC) reside in bone and are recruited to fracture sites for the healing process. Resident MSC are critical for fracture healing and function as a source of TGF-β1 induced by local OPN, which acts through the transcription factor myeloid zinc finger 1 (MZF1). The molecular mechanisms responsible for the effect of EtOH on fracture healing are still incompletely understood, and this study investigated the role of EtOH in affecting OPN-dependent TGF-β1 expression in MSC. We have demonstrated that EtOH inhibits OPN-induced TGF-β1 protein expression, decreases MZF1-dependent TGF-β1 transcription and MZF1 transcription, and blocks OPN-induced MZF1 phosphorylation. We also found that PKA signaling enhances OPN-induced TGF-β1 expression. Last, we showed that EtOH exposure reduces the TGF-β1 protein levels in mouse fracture callus. We conclude that EtOH acts in a novel mechanism by interfering directly with the OPN-MZF1-TGF-β1 signaling pathway in MSC.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Carrie A Franzen
- Urology, Loyola University Medical Center, Maywood, Illinois 60130
| | - Gopal N Gupta
- Urology, Loyola University Medical Center, Maywood, Illinois 60130
| | | | | | | | | | | |
Collapse
|
32
|
Selvam S, Pithapuram MV, Victor SP, Muthu J. Injectable in situ forming xylitol-PEG-based hydrogels for cell encapsulation and delivery. Colloids Surf B Biointerfaces 2014; 126:35-43. [PMID: 25543981 DOI: 10.1016/j.colsurfb.2014.11.043] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 11/04/2014] [Accepted: 11/26/2014] [Indexed: 11/08/2022]
Abstract
Injectable in situ crosslinking hydrogels offer unique advantages over conventional prefabricated hydrogel methodologies. Herein, we synthesize poly(xylitol-co-maleate-co-PEG) (pXMP) macromers and evaluate their performance as injectable cell carriers for tissue engineering applications. The designed pXMP elastomers were non-toxic and water-soluble with viscosity values permissible for subcutaneous injectable systems. pXMP-based hydrogels prepared via free radical polymerization with acrylic acid as crosslinker possessed high crosslink density and exhibited a broad range of compressive moduli that could match the natural mechanical environment of various native tissues. The hydrogels displayed controlled degradability and exhibited gradual increase in matrix porosity upon degradation. The hydrophobic hydrogel surfaces preferentially adsorbed albumin and promoted cell adhesion and growth in vitro. Actin staining on cells cultured on thin hydrogel films revealed subconfluent cell monolayers composed of strong, adherent cells. Furthermore, fabricated 3D pXMP cell-hydrogel constructs promoted cell survival and proliferation in vitro. Cumulatively, our results demonstrate that injectable xylitol-PEG-based hydrogels possess excellent physical characteristics and exhibit exceptional cytocompatibility in vitro. Consequently, they show great promise as injectable hydrogel systems for in situ tissue repair and regeneration.
Collapse
Affiliation(s)
- Shivaram Selvam
- Polymer Science Division, BMT Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvanathapuram 695012, Kerala, India.
| | - Madhav V Pithapuram
- Polymer Science Division, BMT Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvanathapuram 695012, Kerala, India
| | - Sunita P Victor
- Polymer Science Division, BMT Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvanathapuram 695012, Kerala, India
| | - Jayabalan Muthu
- Polymer Science Division, BMT Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvanathapuram 695012, Kerala, India
| |
Collapse
|
33
|
Zhao J, Zhao X, Guo B, Ma PX. Multifunctional Interpenetrating Polymer Network Hydrogels Based on Methacrylated Alginate for the Delivery of Small Molecule Drugs and Sustained Release of Protein. Biomacromolecules 2014; 15:3246-52. [DOI: 10.1021/bm5006257] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jun Zhao
- Center
for Biomedical Engineering and Regenerative Medicine, Frontier Institute
of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Xin Zhao
- Center
for Biomedical Engineering and Regenerative Medicine, Frontier Institute
of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Baolin Guo
- Center
for Biomedical Engineering and Regenerative Medicine, Frontier Institute
of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Peter X. Ma
- Center
for Biomedical Engineering and Regenerative Medicine, Frontier Institute
of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| |
Collapse
|
34
|
Araujo A, Cook LM, Lynch CC, Basanta D. An integrated computational model of the bone microenvironment in bone-metastatic prostate cancer. Cancer Res 2014; 74:2391-401. [PMID: 24788098 DOI: 10.1158/0008-5472.can-13-2652] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Bone metastasis will impact most men with advanced prostate cancer. The vicious cycle of bone degradation and formation driven by metastatic prostate cells in bone yields factors that drive cancer growth. Mechanistic insights into this vicious cycle have suggested new therapeutic opportunities, but complex temporal and cellular interactions in the bone microenvironment make drug development challenging. We have integrated biologic and computational approaches to generate a hybrid cellular automata model of normal bone matrix homeostasis and the prostate cancer-bone microenvironment. The model accurately reproduces the basic multicellular unit bone coupling process, such that introduction of a single prostate cancer cell yields a vicious cycle similar in cellular composition and pathophysiology to models of prostate-to-bone metastasis. Notably, the model revealed distinct phases of osteolytic and osteogenic activity, a critical role for mesenchymal stromal cells in osteogenesis, and temporal changes in cellular composition. To evaluate the robustness of the model, we assessed the effect of established bisphosphonate and anti-RANKL therapies on bone metastases. At approximately 100% efficacy, bisphosphonates inhibited cancer progression while, in contrast with clinical observations in humans, anti-RANKL therapy fully eradicated metastases. Reducing anti-RANKL yielded clinically similar results, suggesting that better targeting or dosing could improve patient survival. Our work establishes a computational model that can be tailored for rapid assessment of experimental therapies and delivery of precision medicine to patients with prostate cancer with bone metastases.
Collapse
Affiliation(s)
- Arturo Araujo
- Authors' Affiliations: Departments of Integrated Mathematical Oncology and Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | | | | | | |
Collapse
|
35
|
Tong R, Tang L, Ma L, Tu C, Baumgartner R, Cheng J. Smart chemistry in polymeric nanomedicine. Chem Soc Rev 2014; 43:6982-7012. [DOI: 10.1039/c4cs00133h] [Citation(s) in RCA: 155] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
36
|
Bol'shakov OI, Akala EO. MS-Monitored Conjugation of Poly(ethylene glycol) Monomethacrylate to RGD Peptides. J Appl Polym Sci 2014; 131. [PMID: 24976670 DOI: 10.1002/app.40385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Development of biologically active polymers is an active area of research due to their applications in varied and diverse fields of biomedical research: cell adhesion, tissue proliferation, and drug delivery. Recent advances in chemical modification allow fine-tuning of the properties of biomedical polymers to improve their applications: blood circulation half-life, stimuli-responsive degradation, site-specific targeting, drug loading, etc. In this article, convergent synthesis of polymerizable macromonomers bearing a site-specific ligand (RGD peptide) using a low molecular weight MA-poly(ethylene glycols) (PEGs) is presented. The method affords macromonomers useful as the starting materials to produce biomedical polymers. We found matrix assisted laser desorption/ionization mass spectromerty convenient in monitoring the conjugation process via step-by-step following of PEG modification.
Collapse
Affiliation(s)
- Oleg I Bol'shakov
- Department of Pharmaceutical Sciences/Center for Drug Research and Development (CDRD), College of Pharmacy, Howard University, Washington DC
| | - Emmanuel O Akala
- Department of Pharmaceutical Sciences/Center for Drug Research and Development (CDRD), College of Pharmacy, Howard University, Washington DC
| |
Collapse
|
37
|
Liu X, Liao X, Luo E, Chen W, Bao C, Xu HHK. Mesenchymal stem cells systemically injected into femoral marrow of dogs home to mandibular defects to enhance new bone formation. Tissue Eng Part A 2014; 20:883-92. [PMID: 24125551 DOI: 10.1089/ten.tea.2012.0677] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Musculoskeletal diseases cost the U.S. $849 billion annually. To date, there has been no proof that remote long bone mesenchymal stem cells (BMSC) can home to craniofacial defects for bone regeneration. There has been no report that systemic BMSC injection can increase new bone formation in large animals. The objectives of this study were to use a sex-mismatched canine model for systemic BMSC injection and homing to mandibular defects and to investigate appendicular BMSC migration to craniofacial defects to increase new bone formation. Male beagle dog BMSC were injected into the femoral marrow cavity of female dogs upon which mandibular defects were created. The dogs were sacrificed at 6 weeks. Cells with Y chromosome markers were detected in defects of female dogs with systemic male BMSC injection, indicating the homing of the transplanted BMSC from femoral marrow to the mandibular defect. New bone formation in dogs with systemic BMSC injection was 20-40% higher than control without BMSC injection (p<0.05). Mineralized new bone percentage was increased by 20-40% due to systemic BMSC injection (p<0.05). In conclusion, this study proved that (1) allogeneic BMSC injected into long bone marrow are capable of homing to both appendicular and craniofacial bone in large animals and (2) systemically injected BMSC can significantly increase new bone formation in dog's mandibular defects. These results may help advance the understanding of stem cell homing and present a therapy to enhance bone repair, which may have a wide applicability to the regenerative medicine field.
Collapse
Affiliation(s)
- Xian Liu
- 1 State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu, China
| | | | | | | | | | | |
Collapse
|
38
|
Functionalization of biomaterials with small osteoinductive moieties. Acta Biomater 2013; 9:8773-89. [PMID: 23933486 DOI: 10.1016/j.actbio.2013.08.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/11/2013] [Accepted: 08/02/2013] [Indexed: 12/16/2022]
Abstract
Human mesenchymal stem cells (MSCs) are currently recognized as a powerful cell source for regenerative medicine, notably for their capacity to differentiate into multiple cell types. The combination of MSCs with biomaterials functionalized with instructive cues can be used as a strategy to direct specific lineage commitment, and can thus improve the therapeutic efficacy of these cells. In terms of biomaterial design, one common approach is the functionalization of materials with ligands capable of directly binding to cell receptors and trigger specific differentiation signaling pathways. Other strategies focus on the use of moieties that have an indirect effect, acting, for example, as sequesters of bioactive ligands present in the extracellular milieu that, in turn, will interact with cells. Compared with complex biomolecules, the use of simple compounds, such as chemical moieties and peptides, and other small molecules can be advantageous by leading to less expensive and easily tunable biomaterial formulations. This review describes different strategies that have been used to promote substrate-mediated guidance of osteogenic differentiation of immature osteoblasts, osteoprogenitors and MSCs, through chemically conjugated small moieties, both in two- and three-dimensional set-ups. In each case, the selected moiety, the coupling strategy and the main findings of the study were highlighted. The latest advances and future perspectives in the field are also discussed.
Collapse
|
39
|
Bidan CM, Wang FM, Dunlop JW. A three-dimensional model for tissue deposition on complex surfaces. Comput Methods Biomech Biomed Engin 2013; 16:1056-70. [DOI: 10.1080/10255842.2013.774384] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
40
|
Bone morphogenetic protein-2 release from composite hydrogels of oligo(poly(ethylene glycol) fumarate) and gelatin. Pharm Res 2013; 30:2332-43. [PMID: 23686376 DOI: 10.1007/s11095-013-1077-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 05/08/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE Hydrogel composites of oligo(poly(ethylene glycol) fumarate) (OPF) and gelatin microparticles (GMs) were investigated as carriers of bone morphogenetic protein-2 (BMP-2) for bone tissue engineering applications. METHODS Hydrogel composites with different physical characteristics were prepared by changing the amount and type (acidic vs. basic) of gelatin incorporated in the OPF bulk phase. Composites with differing physical properties (degradation, swelling, and mechanical properties) and differing BMP-2 loading phase were investigated to determine the effect of these factors on BMP-2 release profiles over 28 days. RESULTS Overall, higher gelatin amount increased the degradation and swelling of composites, and acidic GMs further increased the degradation and swelling and reduced the compressive modulus of the composites. The most significant factor affecting the release of BMP-2 from composites was the loading phase of the growth factor: GM loading reduced the burst release, increased BMP-2 release during the later phases of the experiment, and increased the cumulative release in faster degrading samples. CONCLUSIONS The results indicate that the physical properties and the BMP-2 release kinetics of hydrogel composites can be controlled by adjusting multiple parameters at the time of the hydrogel composite fabrication.
Collapse
|
41
|
Schwab EH, Halbig M, Glenske K, Wagner AS, Wenisch S, Cavalcanti-Adam EA. Distinct effects of RGD-glycoproteins on Integrin-mediated adhesion and osteogenic differentiation of human mesenchymal stem cells. Int J Med Sci 2013; 10:1846-59. [PMID: 24324361 PMCID: PMC3856375 DOI: 10.7150/ijms.6908] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 10/05/2013] [Indexed: 12/27/2022] Open
Abstract
The detailed interactions of mesenchymal stem cells (MSCs) with their extracellular matrix (ECM) and the resulting effects on MSC differentiation are still largely unknown. Integrins are the main mediators of cell-ECM interaction. In this study, we investigated the adhesion of human MSCs to fibronectin, vitronectin and osteopontin, three ECM glycoproteins which contain an integrin-binding sequence, the RGD motif. We then assayed MSCs for their osteogenic commitment in the presence of the different ECM proteins. As early as 2 hours after seeding, human MSCs displayed increased adhesion when plated on fibronectin, whereas no significant difference was observed when adhering either to vitronectin or osteopontin. Over a 10-day observation period, cell proliferation was increased when cells were cultured on fibronectin and osteopontin, albeit after 5 days in culture. The adhesive role of fibronectin was further confirmed by measurements of cell area, which was significantly increased on this type of substrate. However, integrin-mediated clusters, namely focal adhesions, were larger and more mature in MSCs adhering to vitronectin and osteopontin. Adhesion to fibronectin induced elevated expression of α₅-integrin, which was further upregulated under osteogenic conditions also for vitronectin and osteopontin. In contrast, during osteogenic differentiation the expression level of β₃-integrin was decreased in MSCs adhering to the different ECM proteins. When MSCs were cultured under osteogenic conditions, their commitment to the osteoblast lineage and their ability to form a mineralized matrix in vitro was increased in presence of fibronectin and osteopontin. Taken together these results indicate a distinct role of ECM proteins in regulating cell adhesion, lineage commitment and phenotype of MSCs, which is due to the modulation of the expression of specific integrin subunits during growth or osteogenic differentiation.
Collapse
Affiliation(s)
- Elisabeth H Schwab
- 1. Department of Biophysical Chemistry, Institute for Physical Chemistry, University of Heidelberg, INF 253, 69120 Heidelberg, Germany & Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569 Stuttgart, Germany
| | | | | | | | | | | |
Collapse
|
42
|
Abstract
Mesenchymal stem cells (MSCs) are multipotent adult stem cells which have self-renewal capacity and differentiation potential into several mesenchymal lineages including bones, cartilages, adipose tissues and tendons. MSCs may repair tissue injuries and prevent immune cell activation and proliferation. Immunomodulation and secretion of growth factors by MSCs have led to realizing the true potential of MSC-based cell therapy. The use of MSCs as immunomodulators has been explored in cell/organ transplant, tissue repair, autoimmune diseases, and prevention of graft vs host disease (GVHD). This review focuses on the clinical applications of MSC-based cell therapy, with particular emphasis on islet transplantation for treating type I diabetes.
Collapse
Affiliation(s)
- Vaibhav Mundra
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, Tennessee 38103, United States
| | | | | |
Collapse
|
43
|
Vo TN, Kasper FK, Mikos AG. Strategies for controlled delivery of growth factors and cells for bone regeneration. Adv Drug Deliv Rev 2012; 64:1292-309. [PMID: 22342771 PMCID: PMC3358582 DOI: 10.1016/j.addr.2012.01.016] [Citation(s) in RCA: 420] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 01/23/2012] [Accepted: 01/30/2012] [Indexed: 12/15/2022]
Abstract
The controlled delivery of growth factors and cells within biomaterial carriers can enhance and accelerate functional bone formation. The carrier system can be designed with pre-programmed release kinetics to deliver bioactive molecules in a localized, spatiotemporal manner most similar to the natural wound healing process. The carrier can also act as an extracellular matrix-mimicking substrate for promoting osteoprogenitor cellular infiltration and proliferation for integrative tissue repair. This review discusses the role of various regenerative factors involved in bone healing and their appropriate combinations with different delivery systems for augmenting bone regeneration. The general requirements of protein, cell and gene therapy are described, with elaboration on how the selection of materials, configurations and processing affects growth factor and cell delivery and regenerative efficacy in both in vitro and in vivo applications for bone tissue engineering.
Collapse
Affiliation(s)
- Tiffany N. Vo
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
| | - F. Kurtis Kasper
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
| | - Antonios G. Mikos
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
- Department of Chemical and Biomolecular Engineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
| |
Collapse
|
44
|
Abstract
This protocol describes the synthesis of oligo(poly(ethylene glycol) fumarate) (OPF; 1-35 kDa; a polymer useful for tissue engineering applications) by a one-pot reaction of poly(ethylene glycol) (PEG) and fumaryl chloride. The procedure involves three parts: dichloromethane and PEG are first dried; the reaction step follows, in which fumaryl chloride and triethylamine are added dropwise to a solution of PEG in dichloromethane; and finally, the product solution is filtered to remove by-product salt, and the OPF product is twice crystallized, washed and dried under vacuum. The reaction is affected by the molecular weight of PEG and reactant molar ratio. The OPF product is cross-linked by radical polymerization by either a thermally induced or ultraviolet-induced radical initiator, and the physical properties of the OPF oligomer and resulting cross-linked hydrogel are easily tailored by varying PEG molecular weight. OPF hydrogels are injectable, they polymerize in situ and they undergo biodegradation by hydrolysis of ester bonds. The expected time required to complete this protocol is 6 d.
Collapse
|
45
|
Lamponi S, Leone G, Consumi M, Greco G, Magnani A. In Vitro Biocompatibility of New PVA-Based Hydrogels as Vitreous Body Substitutes. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:555-75. [DOI: 10.1163/092050611x554499] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Stefania Lamponi
- a Department of Pure and Applied Medicinal Chemistry, University of Siena, via Aldo Moro 2, 53110 Siena, Italy
| | - Gemma Leone
- b Department of Pure and Applied Medicinal Chemistry, University of Siena, via Aldo Moro 2, 53110 Siena, Italy
| | - Marco Consumi
- c Department of Pure and Applied Medicinal Chemistry, University of Siena, via Aldo Moro 2, 53110 Siena, Italy
| | - Giuseppe Greco
- d Casa di Cura Rugani, loc. Montarioso, 53100 Siena, Italy
| | - Agnese Magnani
- e Department of Pure and Applied Medicinal Chemistry, University of Siena, via Aldo Moro 2, 53110 Siena, Italy
| |
Collapse
|
46
|
Xu X, Davis KA, Yang P, Gu X, Henderson JH, Mather PT. Shape Memory RGD-Containing Networks: Synthesis, Characterization, and Application in Cell Culture. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.201100060] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
47
|
LIU YANFEI, ZHAO XIAOJUN. PRESENTATION OF BIOACTIVE EPITOPES WITH FREE N-TERMINI ON SELF-ASSEMBLING PEPTIDE NANOFIBERS. NANO 2011. [DOI: 10.1142/s1793292011002391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Branched self-assembling peptides bearing epitopes with free N-termini were designed. A lysine residue was used as branch point to present more than one epitopes in a single peptide. Atomic force microscope, circular dichroism and Fourier transform infrared spectroscopy data indicate that the N-terminus attached epitope sequences do not prevent the formation of the β-sheets and the self-assembling of these peptides into stable nanofibers in aqueous solutions. Rheology experiments show that these peptides could form self-supporting scaffolds once electrostatic repulsions were screened by electrolytes. Fluorescence spectra measurements upon binding of FITC-avidin to surfaces of nanofibers were performed to investigate the effect of charged aspartic acid residues in RGD epitopes at the lysine branching on packing and accessibility of the epitopes. Results show that the electrostatic interaction between hydrophilic side chains at branching and nanofiber surfaces may significantly affect the conformational freedom and accessibility of the epitopes at the periphery of the nanofibers. Cell entrapment experiments reveal that the attached RGD epitopes with free N-termini are biological active.
Collapse
Affiliation(s)
- YANFEI LIU
- Nanomedicine Laboratory, West China Hospital, Sichuan University, Chengdu, 610041, P. R. China
| | - XIAOJUN ZHAO
- Nanomedicine Laboratory, West China Hospital, Sichuan University, Chengdu, 610041, P. R. China
- Center for Biomedical Engineering, Massachusetts Institute of Technology, Cambridge, NE47-379, USA
| |
Collapse
|
48
|
Control of adhesion, focal adhesion assembly, and differentiation of myoblasts by enzymatically crosslinked cell-interactive hydrogels. Macromol Res 2011. [DOI: 10.1007/s13233-011-0909-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
49
|
Kretlow JD, Mikos AG. Founder's award to Antonios G. Mikos, Ph.D., 2011 Society for Biomaterials annual meeting and exposition, Orlando, Florida, April 13-16, 2011: Bones to biomaterials and back again--20 years of taking cues from nature to engineer synthetic polymer scaffolds. J Biomed Mater Res A 2011; 98:323-31. [PMID: 21714068 DOI: 10.1002/jbm.a.33154] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Accepted: 04/28/2011] [Indexed: 12/11/2022]
Abstract
For biomaterials scientists focusing on tissue engineering applications, the gold standard material is healthy, autologous tissue. Ideal material properties and construct design parameters are thus both obvious and often times unachievable; additional considerations such as construct delivery and the underlying pathology necessitating new tissue yield additional design challenges with solutions that are not evident in nature. For the past nearly two decades, our laboratory and collaborators have aimed to develop both new biomaterials and a better understanding of the complex interplay between material and host tissue to facilitate bone and cartilage regeneration. Various approaches have ranged from mimicking native tissue material properties and architecture to developing systems for bioactive molecule delivery as soluble factors or bound directly to the biomaterial substrate. Such technologies have allowed others and us to design synthetic biomaterials incorporating increasing levels of complexity found in native tissues with promising advances made toward translational success. Recent work focuses on translation of these technologies in specific clinical situations through the use of adjunctive biomaterials designed to address existing pathologies or guide host-material integration.
Collapse
Affiliation(s)
- James D Kretlow
- Department of Bioengineering, Rice University, Houston, Texas 77251-1892, USA
| | | |
Collapse
|
50
|
Senta H, Bergeron E, Drevelle O, Park H, Faucheux N. Combination of synthetic peptides derived from bone morphogenetic proteins and biomaterials for medical applications. CAN J CHEM ENG 2011. [DOI: 10.1002/cjce.20453] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|