1
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Zhai X, Tao X, Wu Y, Jin K, Tan H, Zhou T, Chen Y. Injectable and Self-Adaptive Gel Scaffold Based on Heparin Microspheres for Adipogenesis of Human Adipose-Derived Stem Cells. Biomacromolecules 2023; 24:4663-4671. [PMID: 37722066 DOI: 10.1021/acs.biomac.3c00348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
An injectable and self-adaptive heparin microsphere-based cell scaffold was developed to achieve adipose regeneration. Simultaneously, the cell scaffold exhibited a dynamic architecture, self-regulated glucose levels, sustained insulin delivery, and steady viscoelastic properties for adipogenesis. The dynamic cell scaffold is cross-linked by the boronate-diol interaction among heparin-based microspheres, which have boronate and maltose groups. Because of the boronate-maltose ester bonds, the gelatinous complex would be partially dismantled and readily display glucose-sensitive performance by free glucose via competitive displacement. The dynamic cross-linking heparin microsphere scaffold can deliver the lipogenic drug insulin to enhance lipid filling, which has an impact on fat tissue enhancement. A 4-week in vitro cell culture demonstrated that the dynamic heparin microsphere-based cell scaffold, through loading with insulin, showed significantly higher efficiency in promoting ASC differentiation compared with traditional 3D culture methods. In vivo histological results further demonstrated that there was a significant increase in adipose in the proposed cell scaffold, which proved to be statistically significant compared with traditional biomaterials. Notable stain expression of the FABP4 and PPAR-γ genes was also observed in the dynamic cell scaffold containing insulin, which was more similar to natural fat.
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Affiliation(s)
- Xinyue Zhai
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xinwei Tao
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yuqian Wu
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Kesun Jin
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Huaping Tan
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Tianle Zhou
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yong Chen
- Department of Orthopaedics, Jinling Hospital, Nanjing 210002, China
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2
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Tsuji W, Valentin JE, Marra KG, Donnenberg AD, Donnenberg VS, Rubin JP. An Animal Model of Local Breast Cancer Recurrence in the Setting of Autologous Fat Grafting for Breast Reconstruction. Stem Cells Transl Med 2019; 7:125-134. [PMID: 29283514 PMCID: PMC5746146 DOI: 10.1002/sctm.17-0062] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 08/23/2017] [Indexed: 12/17/2022] Open
Abstract
Autologous fat grafting after breast cancer surgery is commonly performed, but concerns about oncologic risk remain. To model the interaction between fat grafting and breast cancer cells, two approaches were employed. In the first approach, graded numbers of viable MDA‐MB‐231 or BT‐474 cells were admixed directly into human fat grafts and injected subcutaneously into immune‐deficient mice to determine if the healing graft is a supportive environment for the tumor. In the second approach, graded doses of MDA‐MB‐231 cells were suspended in Matrigel and injected into the mammary fat pads of mice. Two weeks after the tumor cells engrafted, 100 μL of human adipose tissue was grafted into the same site. Histologically, MDA‐MB‐231 cells seeded within fat grafts were observed and stained positive for human‐specific pan‐cytokeratin and Ki67. The BT‐474 cells failed to survive when seeded within fat grafts at any dose. In the second approach, MDA‐MB‐231 cells had a strong trend toward lower Ki67 staining at all doses. Regression analysis on all groups with fat grafts and MDA‐MB‐231 revealed fat tissue was associated with lower cancer cell Ki67 staining. Healing fat grafts do not support the epithelial BT‐474 cell growth, and support the mesenchymal MDA‐MB‐231 cell growth only at doses ten times greater than in Matrigel controls. Moreover, fat grafts in association with MDA‐MB‐231 cancer cells already present in the wound resulted in decreased tumor proliferation and increased fibrosis. These findings suggest that clinical fat grafting does not induce breast cancer cell growth, and may even have a suppressive effect. stemcellstranslationalmedicine2018;7:125–134
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Affiliation(s)
- Wakako Tsuji
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Breast Surgery, Shiga General Hospital, Moriyama, Shiga, Japan
| | - Jolene E Valentin
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Kacey G Marra
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Albert D Donnenberg
- Department of Medicine, University of Pittsburgh Cancer Center, Pittsburgh, Pennsylvania, USA
| | - Vera S Donnenberg
- Department of Cardiothoracic Surgery, University of Pittsburgh Cancer Center, Pittsburgh, Pennsylvania, USA
| | - J Peter Rubin
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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3
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Mahoney CM, Imbarlina C, Yates CC, Marra KG. Current Therapeutic Strategies for Adipose Tissue Defects/Repair Using Engineered Biomaterials and Biomolecule Formulations. Front Pharmacol 2018; 9:507. [PMID: 29867506 PMCID: PMC5966552 DOI: 10.3389/fphar.2018.00507] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 04/27/2018] [Indexed: 01/01/2023] Open
Abstract
Tissue engineered scaffolds for adipose restoration/repair has significantly evolved in recent years. Patients requiring soft tissue reconstruction, caused by defects or pathology, require biomaterials that will restore void volume with new functional tissue. The gold standard of autologous fat grafting (AFG) is not a reliable option. This review focuses on the latest therapeutic strategies for the treatment of adipose tissue defects using biomolecule formulations and delivery, and specifically engineered biomaterials. Additionally, the clinical need for reliable off-the-shelf therapies, animal models, and challenges facing current technologies are discussed.
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Affiliation(s)
- Christopher M Mahoney
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States
| | - Cayla Imbarlina
- Department of Biology, Carlow University, Pittsburgh, PA, United States
| | - Cecelia C Yates
- Department of Pathology, University of Pittsburgh, Pittsburgh, PA, United States.,Department of Health Promotion and Development, School of Nursing, University of Pittsburgh, Pittsburgh, PA, United States.,McGowan Institute for Regenerative Medicine, Pittsburgh, PA, United States
| | - Kacey G Marra
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States.,McGowan Institute for Regenerative Medicine, Pittsburgh, PA, United States.,Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, United States
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4
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Brown JE, Tozzi L, Schilling B, Kelmendi-Doko A, Truong AB, Rodriguez MJ, Gil ES, Sucsy R, Valentin JE, Philips BJ, Marra KG, Rubin JP, Kaplan DL. Biodegradable silk catheters for the delivery of therapeutics across anatomical repair sites. J Biomed Mater Res B Appl Biomater 2018; 107:501-510. [PMID: 29697188 DOI: 10.1002/jbm.b.34140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 02/28/2018] [Accepted: 03/14/2018] [Indexed: 12/20/2022]
Abstract
Biodegradable silk catheters for the delivery of therapeutics are designed with a focus on creating porous gradients that can direct the release of molecules away from the implantation site. Though suitable for a range of applications, these catheters are designed for drug delivery to transplanted adipose tissue in patients having undergone a fat grafting procedure. A common complication for fat grafts is the rapid reabsorption of large volume adipose transplants. In order to prolong volume retention, biodegradable catheters can be embedded into transplanted tissue to deliver nutrients, growth factors or therapeutics to improve adipocyte viability, proliferation, and ultimately extend volume retention. Two fabrication methods are developed: a silk gel-spinning technique, which uses a novel flash-freezing step to induce high porosity throughout the bulk of the tube, and a dip-coating process using silk protein solutions doped with a water soluble porogen. Increased porosity aids in the diffusion of drug through the silk tube in a controllable way. Additionally, we interface the porous tubes with ALZET osmotic pumps for implantation into a subcutaneous nude mouse model. The work described herein will discuss the processing parameters as well as the interfacing between pump and cargo therapeutic and the resulting release profiles. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2018. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 501-510, 2019.
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Affiliation(s)
- Joseph E Brown
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Lorenzo Tozzi
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Benjamin Schilling
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - Arta Kelmendi-Doko
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - April B Truong
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Maria J Rodriguez
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Eun Seok Gil
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Robert Sucsy
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Jolene E Valentin
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - Brian J Philips
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - Kacey G Marra
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - J Peter Rubin
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
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Optimization and Standardization of the Immunodeficient Mouse Model for Assessing Fat Grafting Outcomes. Plast Reconstr Surg 2017; 140:1185-1194. [DOI: 10.1097/prs.0000000000003868] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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6
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Mahoney CM, Kelmindi-Doko A, Snowden MJ, Peter Rubin J, Marra KG. Adipose derived delivery vehicle for encapsulated adipogenic factors. Acta Biomater 2017; 58:26-33. [PMID: 28532902 DOI: 10.1016/j.actbio.2017.05.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 05/17/2017] [Accepted: 05/18/2017] [Indexed: 10/19/2022]
Abstract
Hydrogels derived from adipose tissue extracellular matrix (AdECM) have shown potential in the ability to generate new adipose tissue in vivo. To further enhance adipogenesis, a composite adipose derived delivery system (CADDS) containing single- and double-walled dexamethasone encapsulated microspheres (SW and DW Dex MS) has been developed. Previously, our laboratory has published the use of Dex MS as an additive to enhance adipogenesis and angiogenesis in adipose tissue grafts. In the current work, AdECM and CADDS are extensively characterized, in addition to conducting in vitro cell culture analysis. Study results indicate the AdECM used for the CADDS has minimal cellular and lipid content allowing for gelation of its collagen structure under physiological conditions. Adipose-derived stem cell (ASC) culture studies confirmed biocompatibility with the CADDS, and adipogenesis was increased in experimental groups containing the hydrogel scaffold. In vitro studies of AdECM hydrogel containing microspheres demonstrated a controlled release of dexamethasone from SW and DW formulations. The delivery of Dex MS via an injectable hydrogel scaffold combines two biologically responsive components to develop a minimally, invasive, off-the-shelf biomaterial for adipose tissue engineering. STATEMENT OF SIGNIFICANCE Scientists and doctors have yet to develop an off-the-shelf product for patients with soft tissue defects. Recently, the use of adipose derived extracellular matrix (adECM) to generate new adipose tissue in vivo has shown great promise but individually, adECM still has limitations in terms of volume and consistency. The current work introduces a novel composite off-the-shelf construct comprised of an adECM-based hydrogel and dexamethasone encapsulated microspheres (Dex MS). The hydrogel construct serves not only as an injectable protein-rich scaffold but also a delivery system for the Dex MS for non-invasive application to the defect site. The methods and results presented are a progressive step forward in the field of adipose tissue engineering.
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Storck K, Fischer R, Buchberger M, Haller B, Regn S. Delivered adipose-derived stromal cells improve host-derived adipose tissue formation in composite constructs in vivo. Laryngoscope 2017; 127:E428-E436. [PMID: 28599055 DOI: 10.1002/lary.26694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 04/13/2017] [Accepted: 04/21/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVES/HYPOTHESIS Adipose tissue engineering aims to provide functional tissue surrogates for the restoration of soft tissue defects and contour deformities in the face. Many studies involve the delivery of cells; however, the impact and the exact role of the implanted cells is not yet fully elucidated. STUDY DESIGN Animal research. METHODS In this study, we used a mouse model for the development of volume-stable adipose tissue using polyurethane scaffolds combined with a long-term stable fibrin gel and adipose-derived stromal cells to investigate the influence of cell delivery on tissue development. RESULTS After 12 weeks in vivo, the emerging tissue in these constructs was shown to be exclusively of host origin by human-specific vimentin staining. Comparison of unseeded versus seeded scaffolds revealed a significant effect of the delivered cells on adipose tissue development as shown by histological staining and histomorphometric quantification of adipocytes, whereas blood vessel formation was not affected by delivery of adipose-derived stromal cells at this time point. CONCLUSIONS This is evidence for an indirect action of the implanted cells, providing a proadipogenic microenvironment within constructs, which was further boosted by adipogenic precultivation of the seeded constructs. Especially in peripheral areas of the constructs, the number of adipocytes was significantly elevated in seeded scaffolds compared to nonseeded controls, suggesting that the implanted cells likely triggered the invasion and differentiation of host cells. This is supported by the fact that the provision of a fat rich environment (by coverage of the constructs with a fat flap upon implantation) additionally stimulated adipose tissue formation. LEVEL OF EVIDENCE NA. Laryngoscope, 127:E428-E436, 2017.
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Affiliation(s)
- Katharina Storck
- Ear, Nose, and Throat, Head and Neck Surgery Department, Technical University of Munich, Munich, Germany
| | - Reyk Fischer
- Ear, Nose, and Throat, Head and Neck Surgery Department, Technical University of Munich, Munich, Germany
| | - Maria Buchberger
- Ear, Nose, and Throat, Head and Neck Surgery Department, Technical University of Munich, Munich, Germany
| | - Bernhard Haller
- Institute of Medical Statistics and Epidemiology , Technical University of Munich, Munich, Germany
| | - Sybille Regn
- Ear, Nose, and Throat, Head and Neck Surgery Department, Technical University of Munich, Munich, Germany
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8
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Kelmendi-Doko A, Rubin JP, Klett K, Mahoney C, Wang S, Marra KG. Controlled dexamethasone delivery via double-walled microspheres to enhance long-term adipose tissue retention. J Tissue Eng 2017; 8:2041731417735402. [PMID: 29051810 PMCID: PMC5638157 DOI: 10.1177/2041731417735402] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 09/13/2017] [Indexed: 11/26/2022] Open
Abstract
Current materials used for adipose tissue reconstruction have critical shortcomings such as suboptimal volume retention, donor-site morbidity, and poor biocompatibility. The aim of this study was to examine a controlled delivery system of dexamethasone to generate stable adipose tissue when mixed with disaggregated human fat in an athymic mouse model for 6 months. The hypothesis that the continued release of dexamethasone from polymeric microspheres would enhance both adipogenesis and angiogenesis more significantly when compared to the single-walled microsphere model, resulting in long-term adipose volume retention, was tested. Dexamethasone was encapsulated within single-walled poly(lactic-co-glycolic acid) microspheres (Dex SW MS) and compared to dexamethasone encapsulated in a poly(lactic-co-glycolic acid) core surrounded by a shell of poly-l-lactide. The double-walled polymer microsphere system in the second model was developed to create a more sustainable drug delivery process. Dexamethasone-loaded poly(lactic-co-glycolic acid) microspheres (Dex SW MS) and dexamethasone-loaded poly(lactic-co-glycolic acid)/poly-l-lactide double-walled microspheres (Dex DW MS) were prepared using single and double emulsion/solvent techniques. In vitro release kinetics were determined. Two doses of each type of microsphere were examined; 50 and 27 mg of Dex MS and Dex DW MS were mixed with 0.3 mL of human lipoaspirate. Additionally, 50 mg of empty MS and lipoaspirate-only controls were examined. Samples were analyzed grossly and histologically after 6 months in vivo. Mass and volume were measured; dexamethasone microsphere-containing samples demonstrated greater adipose tissue retention compared to the control group. Histological analysis, including hematoxylin and eosin and CD31 staining, indicated increased vascularization (p < 0.05) within the Dex MS-containing samples. Controlled delivery of adipogenic factors, such as dexamethasone via polymer microspheres, significantly affects adipose tissue retention by maintaining healthy tissue formation and vascularization. Dex DW MS provide an improved model to former Dex SW MS, resulting in notably longer release time and, consequently, larger volumes of adipose retained in vivo. The use of microspheres, specifically double-walled, as vehicles for controlled drug delivery of adipogenic factors therefore present a clinically relevant model of adipose retention that has the potential to greatly improve soft tissue repair.
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Affiliation(s)
- Arta Kelmendi-Doko
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - J Peter Rubin
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Katarina Klett
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Christopher Mahoney
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sheri Wang
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kacey G Marra
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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Combellack EJ, Jessop ZM, Naderi N, Griffin M, Dobbs T, Ibrahim A, Evans S, Burnell S, Doak SH, Whitaker IS. Adipose regeneration and implications for breast reconstruction: update and the future. Gland Surg 2016; 5:227-41. [PMID: 27047789 PMCID: PMC4791352 DOI: 10.3978/j.issn.2227-684x.2016.01.01] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/17/2015] [Indexed: 12/20/2022]
Abstract
The evolution of breast reconstruction and management of breast cancer has evolved significantly since the earliest descriptions in the Edwin Smith Papyrus (3,000 BC). The development of surgical and scientific expertise has changed the way that women are managed, and plastic surgeons are now able to offer a wide range of reconstructive options to suit individual needs. Beyond the gold standard autologous flap based reconstructions, regenerative therapies promise the elimination of donor site morbidity whilst providing equivalent aesthetic and functional outcomes. Future research aims to address questions regarding ideal cell source, optimisation of scaffold composition and interaction of de novo adipose tissue in the microenvironment of breast cancer.
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10
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Roach BL, Kelmendi-Doko A, Balutis EC, Marra KG, Ateshian GA, Hung CT. Dexamethasone Release from Within Engineered Cartilage as a Chondroprotective Strategy Against Interleukin-1α. Tissue Eng Part A 2016; 22:621-32. [PMID: 26956216 DOI: 10.1089/ten.tea.2016.0018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
While significant progress has been made toward engineering functional cartilage constructs with mechanical properties suitable for in vivo loading, the impact on these grafts of inflammatory cytokines, chemical factors that are elevated with trauma or osteoarthritis, is poorly understood. Previous work has shown dexamethasone to be a critical compound for cultivating cartilage with functional properties, while also providing chondroprotection from proinflammatory cytokines. This study tested the hypothesis that the incorporation of poly(lactic-co-glycolic acid) (PLGA) (75:25) microspheres that release dexamethasone from within chondrocyte-seeded agarose hydrogel constructs would promote development of constructs with functional properties and protect constructs from the deleterious effects of interleukin-1α (IL-1α). After 28 days of growth culture, experimental groups were treated with IL-1α (10 ng/mL) for 7 days. Reaching native equilibrium moduli and proteoglycan levels, dexamethasone-loaded microsphere constructs exhibited tissue properties similar to microsphere-free control constructs cultured in dexamethasone-supplemented culture media and were insensitive to IL-1α exposure. These findings are in stark contrast to constructs containing dexamethasone-free microspheres or no microspheres, cultured without dexamethasone, where IL-1α exposure led to significant tissue degradation. These results support the use of dexamethasone delivery from within engineered cartilage, through biodegradable microspheres, as a strategy to produce mechanically functional tissues that can also combat the deleterious effects of local proinflammatory cytokine exposure.
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Affiliation(s)
- Brendan L Roach
- 1 Department of Biomedical Engineering, Columbia University , New York, New York
| | - Arta Kelmendi-Doko
- 2 Department of Bioengineering, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Elaine C Balutis
- 3 Department of Orthopedics and Sports Medicine, Mount Sinai Health System , New York, New York
| | - Kacey G Marra
- 2 Department of Bioengineering, University of Pittsburgh , Pittsburgh, Pennsylvania.,4 McGowan Institute for Regenerative Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania.,5 Department of Plastic Surgery, University of Pittsburgh , Pittsburgh, Pennsylvania
| | - Gerard A Ateshian
- 1 Department of Biomedical Engineering, Columbia University , New York, New York.,6 Department of Mechanical Engineering, Columbia University , New York, New York
| | - Clark T Hung
- 1 Department of Biomedical Engineering, Columbia University , New York, New York
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11
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Jia Y, Fan M, Chen H, Miao Y, Xing L, Jiang B, Cheng Q, Liu D, Bao W, Qian B, Wang J, Xing X, Tan H, Ling Z, Chen Y. Magnetic hyaluronic acid nanospheres via aqueous Diels-Alder chemistry to deliver dexamethasone for adipose tissue engineering. J Colloid Interface Sci 2015; 458:293-9. [PMID: 26245718 DOI: 10.1016/j.jcis.2015.07.062] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 07/27/2015] [Accepted: 07/28/2015] [Indexed: 12/22/2022]
Abstract
Biopolymer-based nanospheres have great potential in the field of drug delivery and tissue regenerative medicine. In this work, we present a flexible way to conjugate a magnetic hyaluronic acid (HA) nanosphere system that are capable of vectoring delivery of adipogenic factor, e.g. dexamethasone, for adipose tissue engineering. Conjugation of nanospheres was established by aqueous Diels-Alder chemistry between furan and maleimide of HA derivatives. Simultaneously, a furan functionalized dexamethasone peptide, GQPGK, was synthesized and covalently immobilized into the nanospheres. The magnetic HA nanospheres were fabricated by encapsulating super-paramagnetic iron oxide nanoparticles, which exhibited quick magnetic sensitivity. The aqueous Diels-Alder chemistry made nanospheres high binding efficiency of dexamethasone, and the vectoring delivery of dexamethasone could be easily controlled by a external magnetic field. The potential application of the magnetic HA nanospheres on vectoring delivery of adipogenic factor was confirmed by co-culture of human adipose-derived stem cells (ASCs). In vitro cytotoxicity tests demonstrated that incorporation of dexamethasone into magnetic HA nanospheres showed high efficiency to promote ASCs viabilities, in particular under a magnetic field, which suggested a promising future for adipose regeneration applications.
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Affiliation(s)
- Yang Jia
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Ming Fan
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Huinan Chen
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yuting Miao
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Lian Xing
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Bohong Jiang
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Qifan Cheng
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Dongwei Liu
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Weikang Bao
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Bin Qian
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jionglu Wang
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiaodong Xing
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Huaping Tan
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Zhonghua Ling
- Department of Orthopaedics, Jinling Hospital, Nanjing 210002, China
| | - Yong Chen
- Department of Orthopaedics, Jinling Hospital, Nanjing 210002, China
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