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Abstract
The successful transplantation of stem cells has the potential to transform regenerative medicine approaches and open promising avenues to repair, replace, and regenerate diseased, damaged, or aged tissues. However, pre-/post-transplantation issues of poor cell survival, retention, cell fate regulation, and insufficient integration with host tissues constitute significant challenges. The success of stem cell transplantation depends upon the coordinated sequence of stem cell renewal, specific lineage differentiation, assembly, and maintenance of long-term function. Advances in biomaterials can improve pre-/post-transplantation outcomes by integrating biophysiochemical cues and emulating tissue microenvironments. This review highlights leading biomaterials-based approaches for enhancing stem cell transplantation.
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Affiliation(s)
- Bhushan N Kharbikar
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Priya Mohindra
- UC Berkeley-UCSF Graduate Program in Bioengineering, San Francisco, CA 94158, USA
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA; UC Berkeley-UCSF Graduate Program in Bioengineering, San Francisco, CA 94158, USA; Department of Bioengineering, University of California, Berkeley, Berkeley, CA 94720, USA; School of Engineering, Brown University, Providence, RI, 02912, USA.
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2
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Wang G, Xin H, Tian G, Sheng K, Zhang N, Sun S. Core decompression combined with implantation of β-tricalcium phosphate modified by a BMSC affinity cyclic peptide for the treatment of early osteonecrosis of the femoral head. Am J Transl Res 2021; 13:967-978. [PMID: 33841633 PMCID: PMC8014422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 01/23/2021] [Indexed: 06/12/2023]
Abstract
Early intervention of osteonecrosis of the femoral head (ONFH) is very important. At present, the therapeutic effect on early ONFH is not completely satisfactory. D7 peptide has special affinity towards bone marrow mesenchymal stem cell (BMSC). Taking advantage of the adsorption/freeze-drying strategy, we constructed D7 cyclic peptide-modified β-tricalcium phosphate (β-TCP) scaffolds. The functional β-TCP scaffolds can enhance adhesion, spreading and proliferation of BMSCs compared with unmodified β-TCP scaffolds, which was comfired in cytological experiments. In rabbit model of early ONFH, functional β-TCP scaffolds were stuffed into the cavities after core decompression (CD). Radiographic and histological examination confirmed that CD followed by filling of functional β-TCP scaffolds can obviously improve the therapeutic effect of early ONFH. Our study provides a new option for curing early ONFH.
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Affiliation(s)
- Guozong Wang
- Department of Joint Surgery, People’s Hospital of RizhaoRizhao 276800, Shandong, China
| | - Hua Xin
- Department of Neurology, People’s Hospital of RizhaoRizhao 276800, Shandong, China
| | - Guanghao Tian
- Department of Internal Medicine, Lixia People’s HospitalJinan 250014, Shandong, China
| | - Kuisheng Sheng
- Department of Orthopedics, Rizhao City Traditional Chinese Medicine HospitalRizhao 276800, Shandong, China
| | - Nianping Zhang
- The Teaching and Research Section of Surgery, The First Clinical College of Shandong University of Traditional Chinese MedicineJinan 250355, Shandong, China
| | - Shui Sun
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong UniversityJinan 250021, Shandong, China
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3
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Nakano A, Hirata I, Pham BV, Shakya A, Tanimoto K, Kato K. Evaluation of a peptide motif designed for protein tethering to polymer surfaces. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 32:76-92. [PMID: 32867596 DOI: 10.1080/09205063.2020.1816870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In search for peptide motifs that allow us to efficiently tether fusion proteins onto polymer surfaces, we designed a KLKLKLKLKL (KL5) decapeptide in which basic and hydrophobic amino acids were alternately linked. By means of genetic engineering technology together with a bacterial expression system, the KL5 fusions of epidermal growth factor (EGF), basic fibroblast growth factor, and stromal cell-derived factor-1α were prepared together with their control counterparts without KL5. The adsorption experiments were performed for these fusion proteins on the surface of polystyrene, hydrophilized polystyrene, and polycaprolactone by surface plasmon resonance analysis. To understand the results of the binding assays, the structure of the fusion proteins was predicted by ab initio computer simulation and analyzed empirically by circular dichroism spectroscopy. The result of structural analyses suggested that the KL5 peptide is exposed to the outside and has a negligible effect on the structure of the protein partners. However, it was found that the efficiency of KL5 as a peptide motif greatly depends on protein partners. Our results showed that KL5 exerts most effectively its function as a peptide motif when fused to acidic proteins such as EGF. Indeed, the number of living human mesenchymal stem cells determined after 7-day culture was larger on the polystyrene and polycaprolactone surfaces with EGF tethered through the KL5 peptide than control surfaces. According to the results obtained in this study, we conclude that KL5 is useful as a peptide motif for tethering a specific class of protein partners.
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Affiliation(s)
- Ayana Nakano
- Department of Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Department of Orthodontics and Craniofacial Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Isao Hirata
- Department of Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Binh Vinh Pham
- Department of Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Faculty of Odonto-Stomatology, Ho Chi Minh City University of Medicine and Pharmacy, Ho Chi Minh, Vietnam
| | - Ajay Shakya
- Department of Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Department of Community Dentistry, Chitwan Medical College & Hospital, Tribhuvan University, Bharatpur, Nepal
| | - Kotaro Tanimoto
- Department of Orthodontics and Craniofacial Developmental Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Koichi Kato
- Department of Biomaterials, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Nanomedicine Research Division, Research Institute for Nanodevice and Bio Systems, Hiroshima University, Higashi-Hiroshima, Japan
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4
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Enriquez-Ochoa D, Robles-Ovalle P, Mayolo-Deloisa K, Brunck MEG. Immobilization of Growth Factors for Cell Therapy Manufacturing. Front Bioeng Biotechnol 2020; 8:620. [PMID: 32637403 PMCID: PMC7317031 DOI: 10.3389/fbioe.2020.00620] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/20/2020] [Indexed: 12/21/2022] Open
Abstract
Cell therapy products exhibit great therapeutic potential but come with a deterring price tag partly caused by their costly manufacturing processes. The development of strategies that lead to cost-effective cell production is key to expand the reach of cell therapies. Growth factors are critical culture media components required for the maintenance and differentiation of cells in culture and are widely employed in cell therapy manufacturing. However, they are expensive, and their common use in soluble form is often associated with decreased stability and bioactivity. Immobilization has emerged as a possible strategy to optimize growth factor use in cell culture. To date, several immobilization techniques have been reported for attaching growth factors onto a variety of biomaterials, but these have been focused on tissue engineering. This review briefly summarizes the current landscape of cell therapy manufacturing, before describing the types of chemistry that can be used to immobilize growth factors for cell culture. Emphasis is placed to identify strategies that could reduce growth factor usage and enhance bioactivity. Finally, we describe a case study for stem cell factor.
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Affiliation(s)
| | | | - Karla Mayolo-Deloisa
- Tecnologico de Monterrey, School of Engineering and Science, FEMSA Biotechnology Center, Monterrey, Mexico
| | - Marion E. G. Brunck
- Tecnologico de Monterrey, School of Engineering and Science, FEMSA Biotechnology Center, Monterrey, Mexico
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5
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Chen R, Li L, Feng L, Luo Y, Xu M, Leong KW, Yao R. Biomaterial-assisted scalable cell production for cell therapy. Biomaterials 2019; 230:119627. [PMID: 31767445 DOI: 10.1016/j.biomaterials.2019.119627] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 11/01/2019] [Accepted: 11/11/2019] [Indexed: 12/24/2022]
Abstract
Cell therapy, the treatment of diseases using living cells, offers a promising clinical approach to treating refractory diseases. The global market for cell therapy is growing rapidly, and there is an increasing demand for automated methods that can produce large quantities of high quality therapeutic cells. Biomaterials can be used during cell production to establish a biomimetic microenvironment that promotes cell adhesion and proliferation while maintaining target cell genotype and phenotype. Here we review recent progress and emerging techniques in biomaterial-assisted cell production. The increasing use of auxiliary biomaterials and automated production methods provides an opportunity to improve quality control and increase production efficiency using standardized GMP-compliant procedures.
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Affiliation(s)
- Ruoyu Chen
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Ling Li
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Lu Feng
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yixue Luo
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Mingen Xu
- Key Laboratory of Medical Information and 3D Bioprinting of Zhejiang Province, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Kam W Leong
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA.
| | - Rui Yao
- Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
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6
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Wang G, Li Y, Sun T, Wang C, Qiao L, Wang Y, Dong K, Yuan T, Chen J, Chen G, Sun S. BMSC affinity peptide-functionalized β-tricalcium phosphate scaffolds promoting repair of osteonecrosis of the femoral head. J Orthop Surg Res 2019; 14:204. [PMID: 31272458 PMCID: PMC6610984 DOI: 10.1186/s13018-019-1243-5] [Citation(s) in RCA: 13] [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: 04/28/2019] [Accepted: 06/19/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Osteonecrosis of the femoral head (ONFH) is a disabling disease. Early treatment is crucial to the prognosis of the disease. Core decompression (CD) is one of the most commonly used methods for the treatment of early ONFH. But it could not prevent the collapse of the necrotic femoral head. How to improve the therapeutic effect of early ONFH on the basis of CD has become an area of focused research. METHODS Functional β-tricalcium phosphate (β-TCP) scaffolds modified by DPIYALSWSGMA (DPI) peptide, a bone marrow-derived mesenchymal stem cell (BMSC) affinity peptide, were constructed using an adsorption/freeze-drying strategy. The affinity of DPI peptide towards rabbit BMSCs was investigated using flow cytometry and fluorescence cytochemistry. In vitro cell adhesion assay was performed to study the adherent ability of rabbit BMSCs on functional β-TCP scaffolds. After the rabbit model of early ONFH was established, DPI peptide-modified and pure β-TCP scaffolds were transplanted into the remaining cavity after CD. Meanwhile, rabbits treated with pure CD were used as blank control. Twelve weeks after surgery, histological analysis was performed to show the therapeutic effect of three methods on early ONFH. RESULTS The result of ImageXpress Micro Confocal indicated that fabricated DPI peptide-modified functional β-TCP scaffolds exhibited green fluorescence. In flow cytometry, the average fluorescence intensity for rabbit BMSCs incubated with FITC-DPI was significantly higher than that of FITC-LSP (P = 2.733 × 10-8). In fluorescence cytochemistry, strong fluorescent signals were observed in rabbit BMSCs incubated with FITC-DPI and FITC-RGD, whereas no fluorescent signals in cells incubated with FITC-LSP. In cell adhesion assay, the number of adherent cells to β-TCP-DPI scaffolds was more than that of pure β-TCP scaffolds (P = 0.033). The CD + β-TCP-DPI group expressed the lowest vacant bone lacunae percentage compared to CD group (P = 2.350 × 10-4) and CD + β-TCP group (P = 0.020). The expression content of COL1 in CD + β-TCP-DPI group was much higher than CD group (P = 1.262 × 10-7) and CD + β-TCP group (P = 1.666 × 10-7) according to the integrated optical density (IOD) analyses. CONCLUSION Functional β-TCP scaffolds modified by DPI peptide were successfully synthesized using an adsorption/freeze-drying strategy. DPI peptide has good affinity towards rabbit BMSCs. The adhesion of rabbit BMSCs on DPI peptide-modified β-TCP scaffolds was apparently enhanced. CD followed by implantation of DPI peptide-modified β-TCP scaffolds can apparently improve the treatment of early ONFH compared with pure CD and CD followed by implantation of unmodified β-TCP scaffolds. Our current study provides an improved method for the treatment of early ONFH.
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Affiliation(s)
- Guozong Wang
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jingwuweiqi Road, Jinan, 250021, Shandong, China.,College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Yi Li
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jingwuweiqi Road, Jinan, 250021, Shandong, China
| | - Tiantong Sun
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Congcong Wang
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Li Qiao
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Yi Wang
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Kangkang Dong
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Tao Yuan
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Jiazheng Chen
- College of Clinical Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Guanqiao Chen
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271016, Shandong, China
| | - Shui Sun
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jingwuweiqi Road, Jinan, 250021, Shandong, China.
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7
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Wang G, Man Z, Xin H, Li Y, Wu C, Sun S. Enhanced adhesion and proliferation of bone marrow mesenchymal stem cells on β‑tricalcium phosphate modified by an affinity peptide. Mol Med Rep 2018; 19:375-381. [PMID: 30431109 PMCID: PMC6297790 DOI: 10.3892/mmr.2018.9655] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 10/09/2018] [Indexed: 11/09/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are often used in orthopedic tissue engineering, and bone marrow-derived mesenchymal stem cells (BMSCs) are currently considered the gold standard. One of the most important issues in MSC-based tissue engineering therapy is the low number of MSCs in pathological tissues. Achieving efficient recruitment of MSCs to defective or damaged tissues in vivo has been a difficult hurdle. The aim of the present study was to construct a biomaterial that can effectively recruit BMSCs to facilitate the repair of pathological tissues. So functional β-tricalcium phosphate (β-TCP) was synthesized using the BMSC affinity peptide DPIYALSWSGMA (DPI) adsorbed onto β-TCP through an adsorption/freeze-drying strategy. C57BL/6 mouse-derived BMSCs were seeded onto the DPI peptide-modified β-TCP (β-TCP-DPI); in vitro experiments demonstrated that β-TCP-DPI enhanced BMSC adhesion and proliferation compared with unmodified β-TCP. Results from the present study indicated that functional β-TCP may be used as an ideal scaffold in tissue engineering and in regenerative medicine.
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Affiliation(s)
- Guozong Wang
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Zhentao Man
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Hua Xin
- Department of Neurology, People's Hospital of Rizhao, Rizhao, Shandong 222000, P.R. China
| | - Yi Li
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Changshun Wu
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Shui Sun
- Department of Joint Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
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8
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Winton AJ, Baptiste JL, Allen MA. A versatile expression vector for the growth and amplification of unmodified phage display polypeptides. Protein Expr Purif 2018; 149:31-36. [DOI: 10.1016/j.pep.2018.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/12/2018] [Accepted: 04/13/2018] [Indexed: 11/29/2022]
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9
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Fernandes-Cunha GM, Lee HJ, Kumar A, Kreymerman A, Heilshorn S, Myung D. Immobilization of Growth Factors to Collagen Surfaces Using Pulsed Visible Light. Biomacromolecules 2017; 18:3185-3196. [PMID: 28799757 DOI: 10.1021/acs.biomac.7b00838] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
In the treatment of traumatic injuries, burns, and ulcers of the eye, inadequate epithelial tissue healing remains a major challenge. Wound healing is a complex process involving the temporal and spatial interplay between cells and their extracellular milieu. It can be impaired by a variety of causes including infection, poor circulation, loss of critical cells, and/or proteins, and a deficiency in normal neural signaling (e.g., neurotrophic ulcers). Ocular anatomy is particularly vulnerable to lasting morbidity from delayed healing, whether it be scarring or perforation of the cornea, destruction of the conjunctival mucous membrane, or cicatricial changes to the eyelids and surrounding skin. Therefore, there is a major clinical need for new modalities for controlling and accelerating wound healing, particularly in the eye. Collagen matrices have long been explored as scaffolds to support cell growth as both two-dimensional coatings and substrates, as well as three-dimensional matrices. Meanwhile, the immobilization of growth factors to various substrates has also been extensively studied as a way to promote enhanced cellular adhesion and proliferation. Herein we present a new strategy for photochemically immobilizing growth factors to collagen using riboflavin as a photosensitizer and exposure to visible light (∼458 nm). Epidermal growth factor (EGF) was successfully bound to collagen-coated surfaces as well as directly to endogenous collagen from porcine corneas. The initial concentration of riboflavin and EGF as well as the blue light exposure time were keys to the successful binding of growth factors to these surfaces. The photocrosslinking reaction increased EGF residence time on collagen surfaces over 7 days. EGF activity was maintained after the photocrosslinking reaction with a short duration of pulsed blue light exposure. Bound EGF accelerated in vitro corneal epithelial cell proliferation and migration and maintained normal cell phenotype. Additionally, the treated surfaces were cytocompatible, and the photocrosslinking reaction was proven to be safe, preserving nearly 100% cell viability. These results suggest that this general approach is safe and versatile may be used for targeting and immobilizing bioactive factors onto collagen matrices in a variety of applications, including in the presence of live, seeded cells or in vivo onto endogenous extracellular matrix collagen.
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Affiliation(s)
| | - Hyun Jong Lee
- Byers Eye Institute at Stanford University School of Medicine , Palo Alto, California 94303, United States
| | - Alisha Kumar
- Byers Eye Institute at Stanford University School of Medicine , Palo Alto, California 94303, United States
| | - Alexander Kreymerman
- Byers Eye Institute at Stanford University School of Medicine , Palo Alto, California 94303, United States
| | - Sarah Heilshorn
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
| | - David Myung
- Byers Eye Institute at Stanford University School of Medicine , Palo Alto, California 94303, United States.,VA Palo Alto Health Care System , Palo Alto, CA 94304, United States
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10
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Dorsey TB, Grath A, Wang A, Xu C, Hong Y, Dai G. Evaluation of Photochemistry Reaction Kinetics to Pattern Bioactive Proteins on Hydrogels for Biological Applications. Bioact Mater 2017; 3:64-73. [PMID: 29632897 PMCID: PMC5889137 DOI: 10.1016/j.bioactmat.2017.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Bioactive signals play many important roles on cell function and behavior. In most biological studies, soluble biochemical cues such as growth factors or cytokines are added directly into the media to maintain and/or manipulate cell activities in vitro. However, these methods cannot accurately mimic certain in vivo biological signaling motifs, which are often immobilized to extracellular matrix and also display spatial gradients that are critical for tissue morphology. Besides biochemical cues, biophysical properties such as substrate stiffness can influence cell behavior but is not easy to manipulate under conventional cell culturing practices. Recent development in photocrosslinkable hydrogels provides new tools that allow precise control of spatial biochemical and biophysical cues for biological applications, but doing so requires a comprehensive study on various hydrogel photochemistry kinetics to allow thorough photocrosslink reaction while maintain protein bioactivities at the same time. In this paper, we studied several photochemistry reactions and evaluate key photochemical parameters, such as photoinitiators and ultra-violet (UV) exposure times, to understand their unique contributions to undesired protein damage and cell death. Our data illustrates the retention of protein function and minimize of cell health during photoreactions requires careful selection of photoinitiator type and concentration, and UV exposure times. We also developed a robust method based on thiol-norbornene chemistry for independent control of hydrogel stiffness and spatial bioactive patterns. Overall, we highlight a class of bioactive hydrogels to stiffness control and site specific immobilized bioactive proteins/peptides for the study of cellular behavior such as cellular attraction, repulsion and stem cell fate.
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Affiliation(s)
- Taylor B Dorsey
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.,Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180.,Department of Bioengineering, Northeastern University, Boston, MA 02115
| | - Alexander Grath
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.,Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Annling Wang
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Cancan Xu
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019
| | - Yi Hong
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019
| | - Guohao Dai
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.,Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180.,Department of Bioengineering, Northeastern University, Boston, MA 02115
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11
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Nuschke A, Rodrigues M, Rivera J, Yates C, Whaley D, Stolz D, Griffith L, Wells A. Epidermal Growth Factor Tethered to β-Tricalcium Phosphate Bone Scaffolds via a High-Affinity Binding Peptide Enhances Survival of Human Mesenchymal Stem Cells/Multipotent Stromal Cells in an Immune-Competent Parafascial Implantation Assay in Mice. Stem Cells Transl Med 2016; 5:1580-1586. [PMID: 27400798 PMCID: PMC5070502 DOI: 10.5966/sctm.2015-0326] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 04/08/2016] [Indexed: 12/25/2022] Open
Abstract
: Mesenchymal stem cells/multipotent stromal cells (MSCs) are attractive candidates for cell therapies owing to their ability to differentiate into many lineages. However, these cells often fail to survive when implanted into a harsh wound environment, limiting efficacy in vivo. To improve MSC survival, we previously found that tethered epidermal growth factor (tEGF) molecules that restrict epidermal growth factor receptor (EGFR) signaling to the cell surface provide resistance to death signals. To adapt this system to wound healing, we tethered epidermal growth factor (EGF) to tricalcium phosphate (TCP) particle scaffolds, clinically used in bone healing. Human primary MSCs seeded on TCP and mixed into a collagen-based gel were injected in the perifascial space of immunocompetent mice with or without tEGF attached to the surface. We found that tethering EGF to the TCP scaffolds yielded approximately a fourfold increase in MSC survival compared with non-EGF scaffolds at 21 days, as well as significant improvements in survival in the short term at 2 and 7 days after implantation. Overall, our approach to sustaining EGFR signaling reduced MSC death in vivo and may be useful for future cell therapies where MSCs typically die on implantation. SIGNIFICANCE Stem cells are limited as tissue replacements owing to rapid death induced in the hostile wound environment. It has been found that restricting epidermal growth factor (EGF) receptor signaling to the membrane provides a survival advantage. This report elucidates a method to tether EGF to bone induction material to improve the survival of mesenchymal stem cells/multipotent stromal cells in vivo.
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Affiliation(s)
- Austin Nuschke
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Melanie Rodrigues
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jaime Rivera
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Cecelia Yates
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Health Promotion and Development, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- VA Pittsburgh Health System, Pittsburgh, Pennsylvania, USA
| | - Diana Whaley
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Donna Stolz
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Linda Griffith
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Alan Wells
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- VA Pittsburgh Health System, Pittsburgh, Pennsylvania, USA
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12
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Curry AS, Pensa NW, Barlow AM, Bellis SL. Taking cues from the extracellular matrix to design bone-mimetic regenerative scaffolds. Matrix Biol 2016; 52-54:397-412. [PMID: 26940231 DOI: 10.1016/j.matbio.2016.02.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/25/2016] [Accepted: 02/25/2016] [Indexed: 12/30/2022]
Abstract
There is an ongoing need for effective materials that can replace autologous bone grafts in the clinical treatment of bone injuries and deficiencies. In recent years, research efforts have shifted away from a focus on inert biomaterials to favor scaffolds that mimic the biochemistry and structure of the native bone extracellular matrix (ECM). The expectation is that such scaffolds will integrate with host tissue and actively promote osseous healing. To further enhance the osteoinductivity of bone graft substitutes, ECM-mimetic scaffolds are being engineered with a range of growth factors (GFs). The technologies used to generate GF-modified scaffolds are often inspired by natural processes that regulate the association between endogenous ECMs and GFs. The purpose of this review is to summarize research centered on the development of regenerative scaffolds that replicate the fundamental collagen-hydroxyapatite structure of native bone ECM, and the functionalization of these scaffolds with GFs that stimulate critical events in osteogenesis.
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Affiliation(s)
- Andrew S Curry
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States
| | - Nicholas W Pensa
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States
| | - Abby M Barlow
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States
| | - Susan L Bellis
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States; Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States.
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