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Wei F, Hughes M, Omer M, Ngo C, Pugazhendhi AS, Kolanthai E, Aceto M, Ghattas Y, Razavi M, Kean TJ, Seal S, Coathup M. A Multifunctional Therapeutic Strategy Using P7C3 as A Countermeasure Against Bone Loss and Fragility in An Ovariectomized Rat Model of Postmenopausal Osteoporosis. Adv Sci (Weinh) 2024:e2308698. [PMID: 38477537 DOI: 10.1002/advs.202308698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Indexed: 03/14/2024]
Abstract
By 2060, an estimated one in four Americans will be elderly. Consequently, the prevalence of osteoporosis and fragility fractures will also increase. Presently, no available intervention definitively prevents or manages osteoporosis. This study explores whether Pool 7 Compound 3 (P7C3) reduces progressive bone loss and fragility following the onset of ovariectomy (OVX)-induced osteoporosis. Results confirm OVX-induced weakened, osteoporotic bone together with a significant gain in adipogenic body weight. Treatment with P7C3 significantly reduced osteoclastic activity, bone marrow adiposity, whole-body weight gain, and preserved bone area, architecture, and mechanical strength. Analyses reveal significantly upregulated platelet derived growth factor-BB and leukemia inhibitory factor, with downregulation of interleukin-1 R6, and receptor activator of nuclear factor kappa-B (RANK). Together, proteomic data suggest the targeting of several key regulators of inflammation, bone, and adipose turnover, via transforming growth factor-beta/SMAD, and Wingless-related integration site/be-catenin signaling pathways. To the best of the knowledge, this is first evidence of an intervention that drives against bone loss via RANK. Metatranscriptomic analyses of the gut microbiota show P7C3 increased Porphyromonadaceae bacterium, Candidatus Melainabacteria, and Ruminococcaceae bacterium abundance, potentially contributing to the favorable inflammatory, and adipo-osteogenic metabolic regulation observed. The results reveal an undiscovered, and multifunctional therapeutic strategy to prevent the pathological progression of OVX-induced bone loss.
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Affiliation(s)
- Fei Wei
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
| | - Megan Hughes
- School of Biosciences, Cardiff University, Wales, CF10 3AT, UK
| | - Mahmoud Omer
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
| | - Christopher Ngo
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | | | - Elayaraja Kolanthai
- Advanced Materials Processing and Analysis Centre, Nanoscience Technology Center (NSTC), University of Central Florida, Orlando, FL, 32826, USA
| | - Matthew Aceto
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Yasmine Ghattas
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Mehdi Razavi
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Thomas J Kean
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Sudipta Seal
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
- Advanced Materials Processing and Analysis Centre, Nanoscience Technology Center (NSTC), University of Central Florida, Orlando, FL, 32826, USA
| | - Melanie Coathup
- Biionix Cluster, University of Central Florida, Orlando, FL, 82816, USA
- College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
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Stolarov P, de Vries J, Stapleton S, Morris L, Martyniak K, Kean TJ. Suitability of Gelatin Methacrylate and Hydroxyapatite Hydrogels for 3D-Bioprinted Bone Tissue. Materials (Basel) 2024; 17:1218. [PMID: 38473692 DOI: 10.3390/ma17051218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/13/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024]
Abstract
BACKGROUND Complex bone defects are challenging to treat. Autografting is the gold standard for regenerating bone defects; however, its limitations include donor-site morbidity and increased surgical complexity. Advancements in 3D bioprinting (3DBP) offer a promising alternative for viable bone grafts. In this experiment, gels composed of varying levels of gelatin methacrylate (GelMA) and hydroxyapatite (HA) and gelatin concentrations are explored. The objective was to increase the hydroxyapatite content and find the upper limit before the printability was compromised and determine its effect on the mechanical properties and cell viability. METHODS Design of Experiments (DoE) was used to design 13 hydrogel bioinks of various GelMA/HA concentrations. These bioinks were assessed in terms of their pipettability and equilibrium modulus. An optimal bioink was designed using the DoE data to produce the greatest stiffness while still being pipettable. Three bioinks, one with the DoE-designed maximal stiffness, one with the experimentally defined maximal stiffness, and a literature-based control, were then printed using a 3D bioprinter and assessed for print fidelity. The resulting hydrogels were combined with human bone-marrow-derived mesenchymal stromal cells (hMSCs) and evaluated for cell viability. RESULTS The DoE ANOVA analysis indicated that the augmented three-level factorial design model used was a good fit (p < 0.0001). Using the model, DoE correctly predicted that a composite hydrogel consisting of 12.3% GelMA, 15.7% HA, and 2% gelatin would produce the maximum equilibrium modulus while still being pipettable. The hydrogel with the most optimal print fidelity was 10% GelMA, 2% HA, and 5% gelatin. There were no significant differences in the cell viability within the hydrogels from day 2 to day 7 (p > 0.05). There was, however, a significantly lower cell viability in the gel composed of 12.3% GelMA, 15.7% HA, and 2% gelatin compared to the other gels with a lower HA concentration (p < 0.05), showing that a higher HA content or print pressure may be cytotoxic within hydrogels. CONCLUSIONS Extrusion-based 3DBP offers significant advantages for bone-tissue implants due to its high customizability. This study demonstrates that it is possible to create printable bone-like grafts from GelMA and HA with an increased HA content, favorable mechanical properties (145 kPa), and a greater than 80% cell viability.
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Affiliation(s)
- Paul Stolarov
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Jonathan de Vries
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Sean Stapleton
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Lauren Morris
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Kari Martyniak
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Thomas J Kean
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
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Martyniak K, Kennedy S, Karimzadeh M, Cruz MA, Jeon O, Alsberg E, Kean TJ. Optimizing Bioink Composition for Human Chondrocyte Expression of Lubricin. Bioengineering (Basel) 2023; 10:997. [PMID: 37760099 PMCID: PMC10526043 DOI: 10.3390/bioengineering10090997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 09/29/2023] Open
Abstract
The surface zone of articular cartilage is the first area impacted by cartilage defects, commonly resulting in osteoarthritis. Chondrocytes in the surface zone of articular cartilage synthesize and secrete lubricin, a proteoglycan that functions as a lubricant protecting the deeper layers from shear stress. Notably, 3D bioprinting is a tissue engineering technique that uses cells encapsulated in biomaterials to fabricate 3D constructs. Gelatin methacrylate (GelMA) is a frequently used biomaterial for 3D bioprinting cartilage. Oxidized methacrylated alginate (OMA) is a chemically modified alginate designed for its tunable degradation rate and mechanical properties. To determine an optimal combination of GelMA and OMA for lubricin expression, we used our novel high-throughput human articular chondrocyte reporter system. Primary human chondrocytes were transduced with PRG4 (lubricin) promoter-driven Gaussia luciferase, allowing for temporal assessment of lubricin expression. A lubricin expression-driven Design of Experiment screen and subsequent validation identified 14% GelMA/2% OMA for further study. Therefore, DoE optimized 14% GelMA/2% OMA, 14% GelMA control, and 16% GelMA (total solid content control) were 3D bioprinted. The combination of lubricin protein expression and shape retention over the 22 days in culture, successfully determined the 14% GelMA/2%OMA to be the optimal formulation for lubricin secretion. This strategy allows for rapid analysis of the role(s) of biomaterial composition, stiffness or other cell manipulations on lubricin expression by chondrocytes, which may improve therapeutic strategies for cartilage regeneration.
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Affiliation(s)
- Kari Martyniak
- Biionix Cluster, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Sean Kennedy
- Biionix Cluster, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Makan Karimzadeh
- Biionix Cluster, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Maria A. Cruz
- Biionix Cluster, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
| | - Oju Jeon
- Department of Biomedical Engineering, University of Illinois Chicago, Chicago, IL 60607, USA; (O.J.); (E.A.)
| | - Eben Alsberg
- Department of Biomedical Engineering, University of Illinois Chicago, Chicago, IL 60607, USA; (O.J.); (E.A.)
| | - Thomas J. Kean
- Biionix Cluster, College of Medicine, University of Central Florida, Orlando, FL 32827, USA
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Cruz MA, Gonzalez Y, Vélez Toro JA, Karimzadeh M, Rubbo A, Morris L, Medam R, Splawn T, Archer M, Fernandes RJ, Dennis JE, Kean TJ. Micronutrient optimization for tissue engineered articular cartilage production of type II collagen. Front Bioeng Biotechnol 2023; 11:1179332. [PMID: 37346792 PMCID: PMC10280293 DOI: 10.3389/fbioe.2023.1179332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/23/2023] [Indexed: 06/23/2023] Open
Abstract
Tissue Engineering of cartilage has been hampered by the inability of engineered tissue to express native levels of type II collagen in vitro. Inadequate levels of type II collagen are, in part, due to a failure to recapitulate the physiological environment in culture. In this study, we engineered primary rabbit chondrocytes to express a secreted reporter, Gaussia Luciferase, driven by the type II collagen promoter, and applied a Design of Experiments approach to assess chondrogenic differentiation in micronutrient-supplemented medium. Using a Response Surface Model, 240 combinations of micronutrients absent in standard chondrogenic differentiation medium, were screened and assessed for type II collagen promoter-driven Gaussia luciferase expression. While the target of this study was to establish a combination of all micronutrients, alpha-linolenic acid, copper, cobalt, chromium, manganese, molybdenum, vitamins A, E, D and B7 were all found to have a significant effect on type II collagen promoter activity. Five conditions containing all micronutrients predicted to produce the greatest luciferase expression were selected for further study. Validation of these conditions in 3D aggregates identified an optimal condition for type II collagen promoter activity. Engineered cartilage grown in this condition, showed a 170% increase in type II collagen expression (Day 22 Luminescence) and in Young's tensile modulus compared to engineered cartilage in basal media alone.Collagen cross-linking analysis confirmed formation of type II-type II collagen and type II-type IX collagen cross-linked heteropolymeric fibrils, characteristic of mature native cartilage. Combining a Design of Experiments approach and secreted reporter cells in 3D aggregate culture enabled a high-throughput platform that can be used to identify more optimal physiological culture parameters for chondrogenesis.
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Affiliation(s)
- Maria A. Cruz
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Yamilet Gonzalez
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Javier A. Vélez Toro
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Makan Karimzadeh
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Anthony Rubbo
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Lauren Morris
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Ramapaada Medam
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
| | - Taylor Splawn
- Baylor College of Medicine, Houston, TX, United States
| | - Marilyn Archer
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, United States
| | - Russell J. Fernandes
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, United States
| | | | - Thomas J. Kean
- Biionix Cluster, Internal Medicine, University of Central Florida College of Medicine, Orlando, FL, United States
- Baylor College of Medicine, Houston, TX, United States
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Aboutalebianaraki N, Zeblisky P, Sarker MD, Jeyaranjan A, Sakthivel TS, Fu Y, Lucchi J, Baudelet M, Seal S, Kean TJ, Razavi M. An osteogenic magnesium alloy with improved corrosion resistance, antibacterial, and mechanical properties for orthopedic applications. J Biomed Mater Res A 2023; 111:556-574. [PMID: 36494895 DOI: 10.1002/jbm.a.37476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 07/08/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022]
Abstract
The aim of this study was to develop a novel biodegradable magnesium (Mg) alloy for bone implant applications. We used scandium (Sc; 2 wt %) and strontium (Sr; 2 wt %) as alloying elements due to their high biocompatibility, antibacterial efficacy, osteogenesis, and protective effects against corrosion. In the present work, we also examined the effect of a heat treatment process on the properties of the Mg-Sc-Sr alloy. Alloys were manufactured using a metal casting process followed by heat treatment. The microstructure, corrosion, mechanical properties, antibacterial activity, and osteogenic activity of the alloy were assessed in vitro. The results showed that the incorporation of Sc and Sr elements controlled the corrosion, reduced the hydrogen generation, and enhanced mechanical properties. Furthermore, alloying with Sc and Sr demonstrated a significantly enhanced antibacterial activity and decreased biofilm formation compared to control Mg. Also, culturing Mg-Sc-Sr alloy with human bone marrow-derived mesenchymal stromal cells showed a high degree of biocompatibility (>90% live cells) and a significant increase in osteoblastic differentiation in vitro shown by Alizarin red staining and alkaline phosphatase activity. Based on these results, the Mg-Sc-Sr alloy heat-treated at 400°C displayed optimal mechanical properties, corrosion rate, antibacterial efficacy, and osteoinductivity. These characteristics make the Mg-Sc-Sr alloy a promising candidate for biodegradable orthopedic implants in the fixation of bone fractures such as bone plate-screws or intramedullary nails.
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Affiliation(s)
- Nadia Aboutalebianaraki
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida, USA.,Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
| | - Peter Zeblisky
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida, USA
| | - M D Sarker
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida, USA
| | - Aadithya Jeyaranjan
- Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA.,Advanced Materials Processing and Analysis Center, Nanoscience Technology Center, University of Central Florida, Orlando, Florida, USA
| | - Tamil S Sakthivel
- Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA.,Advanced Materials Processing and Analysis Center, Nanoscience Technology Center, University of Central Florida, Orlando, Florida, USA
| | - Yifei Fu
- Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA.,Advanced Materials Processing and Analysis Center, Nanoscience Technology Center, University of Central Florida, Orlando, Florida, USA
| | - John Lucchi
- Department of Chemistry, University of Central Florida, Orlando, Florida, USA.,National Center for Forensic Science, University of Central Florida, Orlando, Florida, USA
| | - Matthieu Baudelet
- Department of Chemistry, University of Central Florida, Orlando, Florida, USA.,National Center for Forensic Science, University of Central Florida, Orlando, Florida, USA.,CREOL - The College of Optics and Photonics, University of Central Florida, Orlando, Florida, USA
| | - Sudipta Seal
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida, USA.,Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA.,Advanced Materials Processing and Analysis Center, Nanoscience Technology Center, University of Central Florida, Orlando, Florida, USA
| | - Thomas J Kean
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida, USA
| | - Mehdi Razavi
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida, USA.,Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
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6
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Pan RL, Martyniak K, Karimzadeh M, Gelikman DG, DeVries J, Sutter K, Coathup M, Razavi M, Sawh-Martinez R, Kean TJ. Systematic review on the application of 3D-bioprinting technology in orthoregeneration: current achievements and open challenges. J Exp Orthop 2022; 9:95. [PMID: 36121526 PMCID: PMC9485345 DOI: 10.1186/s40634-022-00518-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/08/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Joint degeneration and large or complex bone defects are a significant source of morbidity and diminished quality of life worldwide. There is an unmet need for a functional implant with near-native biomechanical properties. The potential for their generation using 3D bioprinting (3DBP)-based tissue engineering methods was assessed. We systematically reviewed the current state of 3DBP in orthoregeneration. METHODS This review was performed using PubMed and Web of Science. Primary research articles reporting 3DBP of cartilage, bone, vasculature, and their osteochondral and vascular bone composites were considered. Full text English articles were analyzed. RESULTS Over 1300 studies were retrieved, after removing duplicates, 1046 studies remained. After inclusion and exclusion criteria were applied, 114 articles were analyzed fully. Bioink material types and combinations were tallied. Cell types and testing methods were also analyzed. Nearly all papers determined the effect of 3DBP on cell survival. Bioink material physical characterization using gelation and rheology, and construct biomechanics were performed. In vitro testing methods assessed biochemistry, markers of extracellular matrix production and/or cell differentiation into respective lineages. In vivo proof-of-concept studies included full-thickness bone and joint defects as well as subcutaneous implantation in rodents followed by histological and µCT analyses to demonstrate implant growth and integration into surrounding native tissues. CONCLUSIONS Despite its relative infancy, 3DBP is making an impact in joint and bone engineering. Several groups have demonstrated preclinical efficacy of mechanically robust constructs which integrate into articular joint defects in small animals. However, notable obstacles remain. Notably, researchers encountered pitfalls in scaling up constructs and establishing implant function and viability in long term animal models. Further, to translate from the laboratory to the clinic, standardized quality control metrics such as construct stiffness and graft integration metrics should be established with investigator consensus. While there is much work to be done, 3DBP implants have great potential to treat degenerative joint diseases and provide benefit to patients globally.
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Affiliation(s)
- Rachel L Pan
- College of Medicine, University of Central Florida, Orlando, FL, USA
| | - Kari Martyniak
- Biionix Cluster, College of Medicine, University of Central Florida, 6900 Lake Nona Blvd, Orlando, FL, 32827, USA
| | - Makan Karimzadeh
- Biionix Cluster, College of Medicine, University of Central Florida, 6900 Lake Nona Blvd, Orlando, FL, 32827, USA
| | - David G Gelikman
- College of Medicine, University of Central Florida, Orlando, FL, USA
| | - Jonathan DeVries
- College of Medicine, University of Central Florida, Orlando, FL, USA
| | - Kelly Sutter
- College of Medicine, University of Central Florida, Orlando, FL, USA
| | - Melanie Coathup
- Biionix Cluster, College of Medicine, University of Central Florida, 6900 Lake Nona Blvd, Orlando, FL, 32827, USA
| | - Mehdi Razavi
- Biionix Cluster, College of Medicine, University of Central Florida, 6900 Lake Nona Blvd, Orlando, FL, 32827, USA
| | - Rajendra Sawh-Martinez
- College of Medicine, University of Central Florida, Orlando, FL, USA.,Plastic and Reconstructive Surgery, AdventHealth, Orlando, FL, USA
| | - Thomas J Kean
- Biionix Cluster, College of Medicine, University of Central Florida, 6900 Lake Nona Blvd, Orlando, FL, 32827, USA.
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Truong RD, Bernier MA, Dennis JE, Kean TJ. Synoviocyte-Derived Extracellular Matrix and bFGF Speed Human Chondrocyte Proliferation While Maintaining Differentiation Potential. Front Bioeng Biotechnol 2022; 10:825005. [PMID: 35685088 PMCID: PMC9171110 DOI: 10.3389/fbioe.2022.825005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 04/15/2022] [Indexed: 11/25/2022] Open
Abstract
Improving the ability of human chondrocytes to proliferate, while maintaining their differentiation potential, has presented a great challenge in cartilage tissue engineering. In this study, human chondrocytes were cultured under four unique growth conditions at physiologic oxygen tension: tissue culture plastic (TCP) only, synoviocyte matrix (SCM)–coated flasks only, SCM-coated flasks with bFGF media supplement, and TCP with bFGF media supplement. The results indicated that, compared to standard TCP, all test conditions showed significantly increased cell expansion rates and an increase in both glycosaminoglycan (GAG) and collagen content during redifferentiation culture. Specifically, the combined SCM + bFGF growth condition showed an additive effect, with an increase of approximately 36% more cells per passage (5–7 days) when compared to the SCM alone. In conclusion, the results of this study demonstrate that bFGF and SCM can be used as supplements to enhance the growth of human chondrocytes both as individual enhancers and as a combined additive.
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Affiliation(s)
- Rachel D Truong
- College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Megan A Bernier
- College of Medicine, University of Central Florida, Orlando, FL, United States
| | - James E Dennis
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Thomas J Kean
- College of Medicine, University of Central Florida, Orlando, FL, United States.,Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, United States.,Biionix Cluster, Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, United States
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8
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Dennis JE, Whitney GA, Rai J, Fernandes RJ, Kean TJ. Physioxia Stimulates Extracellular Matrix Deposition and Increases Mechanical Properties of Human Chondrocyte-Derived Tissue-Engineered Cartilage. Front Bioeng Biotechnol 2020; 8:590743. [PMID: 33282851 PMCID: PMC7691651 DOI: 10.3389/fbioe.2020.590743] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 10/14/2020] [Indexed: 12/22/2022] Open
Abstract
Cartilage tissue has been recalcitrant to tissue engineering approaches. In this study, human chondrocytes were formed into self-assembled cartilage sheets, cultured in physiologic (5%) and atmospheric (20%) oxygen conditions and underwent biochemical, histological and biomechanical analysis at 1- and 2-months. The results indicated that sheets formed at physiological oxygen tension were thicker, contained greater amounts of glycosaminoglycans (GAGs) and type II collagen, and had greater compressive and tensile properties than those cultured in atmospheric oxygen. In all cases, cartilage sheets stained throughout for extracellular matrix components. Type II-IX-XI collagen heteropolymer formed in the neo-cartilage and fibrils were stabilized by trivalent pyridinoline cross-links. Collagen cross-links were not significantly affected by oxygen tension but increased with time in culture. Physiological oxygen tension and longer culture periods both served to increase extracellular matrix components. The foremost correlation was found between compressive stiffness and the GAG to collagen ratio.
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Affiliation(s)
| | | | - Jyoti Rai
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, United States
| | - Russell J Fernandes
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, United States
| | - Thomas J Kean
- Benaroya Research Institute, Seattle, WA, United States
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Dennis JE, Splawn T, Kean TJ. High-Throughput, Temporal and Dose Dependent, Effect of Vitamins and Minerals on Chondrogenesis. Front Cell Dev Biol 2020; 8:92. [PMID: 32161755 PMCID: PMC7053227 DOI: 10.3389/fcell.2020.00092] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 02/04/2020] [Indexed: 12/11/2022] Open
Abstract
Tissue engineered hyaline cartilage is plagued by poor mechanical properties largely due to inadequate type II collagen expression. Of note, commonly used defined chondrogenic media lack 14 vitamins and minerals, some of which are implicated in chondrogenesis. Type II collagen promoter-driven Gaussia luciferase was transfected into ATDC5 cells to create a chondrogenic cell with a secreted-reporter. The reporter cells were used in an aggregate-based chondrogenic culture model to develop a high-throughput analytic platform. This high-throughput platform was used to assess the effect of vitamins and minerals, alone and in combination with TGFβ1, on COL2A1 promoter-driven expression. Significant combinatorial effects between vitamins, minerals, and TGFβ1 in terms of COL2A1 promoter-driven expression and metabolism were discovered. An “optimal” continual supplement of copper and vitamin K in the presence of TGFβ1 gave a 2.5-fold increase in COL2A1 promoter-driven expression over TGFβ1 supplemented media alone in ATDC5 cells.
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Affiliation(s)
- James E Dennis
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Taylor Splawn
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Thomas J Kean
- Biionix Cluster, Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, United States
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Mansour JM, Motavalli M, Dennis JE, Kean TJ, Caplan AI, Berilla JA, Welter JF. Rapid Detection of Shear-Induced Damage in Tissue-Engineered Cartilage Using Ultrasound. Tissue Eng Part C Methods 2019; 24:443-456. [PMID: 29999475 DOI: 10.1089/ten.tec.2017.0513] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Previous investigations have shown that tissue-engineered articular cartilage can be damaged under a combination of compression and sliding shear. In these cases, damage was identified in histological sections after a test was completed. This approach is limited, in that it does not identify when damage occurred. This especially limits the utility of an assay for evaluating damage when comparing modifications to a tissue-engineering protocol. In this investigation, the feasibility of using ultrasound (US) to detect damage as it occurs was investigated. US signals were acquired before, during, and after sliding shear, as were stereomicroscope images of the cartilage surface. Histology was used as the standard for showing if a sample was damaged. We showed that US reflections from the surface of the cartilage were attenuated due to roughening following sliding shear. Furthermore, it was shown that by scanning the transducer across a sample, surface roughness and erosion following sliding shear could be identified. Internal delamination could be identified by the appearance of new echoes between those from the front and back of the sample. Thus, it is feasible to detect damage in engineered cartilage using US.
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Affiliation(s)
- Joseph M Mansour
- 1 Department of Mechanical and Aerospace Engineering, Case Western Reserve University , Cleveland, Ohio.,Department of Case Center for Multimodal Evaluation of Engineered Cartilage, Case Western Reserve University , Cleveland, Ohio
| | - Mostafa Motavalli
- Department of Case Center for Multimodal Evaluation of Engineered Cartilage, Case Western Reserve University , Cleveland, Ohio.,3 Department of Biology, Case Western Reserve University , Cleveland, Ohio
| | - James E Dennis
- 4 Department of Orthopedic Surgery, Baylor College of Medicine , Houston, Texas
| | - Thomas J Kean
- 4 Department of Orthopedic Surgery, Baylor College of Medicine , Houston, Texas
| | - Arnold I Caplan
- Department of Case Center for Multimodal Evaluation of Engineered Cartilage, Case Western Reserve University , Cleveland, Ohio.,3 Department of Biology, Case Western Reserve University , Cleveland, Ohio
| | - Jim A Berilla
- Department of Case Center for Multimodal Evaluation of Engineered Cartilage, Case Western Reserve University , Cleveland, Ohio.,5 Department of Civil Engineering, Case Western Reserve University , Cleveland, Ohio
| | - Jean F Welter
- Department of Case Center for Multimodal Evaluation of Engineered Cartilage, Case Western Reserve University , Cleveland, Ohio.,3 Department of Biology, Case Western Reserve University , Cleveland, Ohio
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11
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Dennis JE, Bernardi KG, Kean TJ, Liou NE, Meyer TK. Cover Image, Volume 12, Issue 3. J Tissue Eng Regen Med 2018. [DOI: 10.1002/term.2662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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MacKay DL, Kean TJ, Bernardi KG, Haeberle HS, Ambrose CG, Lin F, Dennis JE. Reduced bone loss in a murine model of postmenopausal osteoporosis lacking complement component 3. J Orthop Res 2018; 36:118-128. [PMID: 28667799 PMCID: PMC5758433 DOI: 10.1002/jor.23643] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 06/21/2017] [Indexed: 02/04/2023]
Abstract
The growing field of osteoimmunology seeks to unravel the complex interdependence of the skeletal and immune systems. Notably, we and others have demonstrated that complement signaling influences the differentiation of osteoblasts and osteoclasts, the two primary cell types responsible for maintaining bone homeostasis. However, the net effect of complement on bone homeostasis in vivo was unknown. Our published in vitro mechanistic work led us to hypothesize that absence of complement component 3 (C3), a central protein in the complement activation cascade, protects against bone loss in the ovariectomy-based model of postmenopausal osteoporosis. Indeed, we report here that, when compared to their C57BL/6J (WT) counterparts, ovariectomized C3 deficient mice experienced reduced bone loss at multiple sites and increased stiffness at the femoral neck, the latter potentially improving mechanical function. WT and B6;129S4-C3tm1Crr /J (C3-/- ) mice were either ovariectomized or sham-operated at 6 weeks of age and euthanized at 12 weeks. MicroCT on harvested bones revealed that the trabecular bone volume fraction in the metaphyses of both the proximal tibiae and distal femora of ovariectomized C3-/- mice is significantly greater than that of their WT counterparts. Lumbar vertebrae showed significantly greater osteoid content and mineral apposition rates. Mechanical testing demonstrated significantly greater stiffness in the femoral necks of ovariectomized C3-/- mice. These results demonstrate that C3 deficiency reduces bone loss at ovariectomy and may improve mechanical properties. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:118-128, 2018.
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Affiliation(s)
- Danielle L. MacKay
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX
| | - Thomas J. Kean
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX
| | | | | | | | - Feng Lin
- Department of Immunology, Cleveland Clinic Lerner Research Institute, Cleveland, OH
| | - James E. Dennis
- Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX
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13
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Dennis JE, Bernardi KG, Kean TJ, Liou NE, Meyer TK. Tissue engineering of a composite trachea construct using autologous rabbit chondrocytes. J Tissue Eng Regen Med 2017; 12:e1383-e1391. [PMID: 28719734 DOI: 10.1002/term.2523] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 05/26/2017] [Accepted: 07/11/2017] [Indexed: 11/10/2022]
Abstract
The repair of large tracheal segmental defects remains an unsolved problem. The goal of this study is to apply tissue engineering principles for the fabrication of large segmental trachea replacements. Engineered tracheal replacements composed of autologous cells (neotracheas) were tested in a New Zealand White rabbit model. Neotracheas were formed in the rabbit neck by wrapping a silicone tube with consecutive layers of skin epithelium, platysma muscle, and an engineered cartilage sheet and allowing the construct to mature for 8-12 weeks. In total, 28 rabbits were implanted and the neotracheas assessed for tissue morphology. In 11 cases, neotracheas deemed sufficiently strong were used to repair segmental tracheal defects. Initially, the success rate of producing structurally sound neotracheas was impeded by physical disruption of the cartilage sheets during animal handling, but by the end of the study, 15 of 18 neotracheas (83.3%) were structurally sound. Of the 15 structurally sound neotracheas, 11 were used for segmental reconstruction and were left in place for up to 21 days. Histological examination showed the presence of variable amounts of viable epithelium, a vascularized platysma flap, and a layer of safranin O-positive cartilage along with evidence of endochondral ossification. Rabbits that had undergone segmental reconstruction showed good tracheal integration, had a viable epithelium with vascular support, and the cartilage was sufficiently strong to maintain a lumen when palpated. The results demonstrated that viable, trilayered, scaffold-free neotracheas could be constructed from autologous cells and could be integrated into native trachea to repair a segmental defect.
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Affiliation(s)
- James E Dennis
- Department of Orthopedic Surgery.,Matrix Biology Program, Benaroya Research Institute, Seattle, WA, USA
| | | | - Thomas J Kean
- Department of Orthopedic Surgery.,Matrix Biology Program, Benaroya Research Institute, Seattle, WA, USA
| | - Nelson E Liou
- Department of Otolaryngology Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Tanya K Meyer
- Department of Otolaryngology Head and Neck Surgery, University of Washington, Seattle, WA, USA
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14
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Whitney GA, Kean TJ, Fernandes RJ, Waldman S, Tse MY, Pang SC, Mansour JM, Dennis JE. Thyroxine Increases Collagen Type II Expression and Accumulation in Scaffold-Free Tissue-Engineered Articular Cartilage. Tissue Eng Part A 2017; 24:369-381. [PMID: 28548569 DOI: 10.1089/ten.tea.2016.0533] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Low collagen accumulation in the extracellular matrix is a pressing problem in cartilage tissue engineering, leading to a low collagen-to-glycosaminoglycan (GAG) ratio and poor mechanical properties in neocartilage. Soluble factors have been shown to increase collagen content, but may result in a more pronounced increase in GAG content. Thyroid hormones have been reported to stimulate collagen and GAG production, but reported outcomes, including which specific collagen types are affected, are variable throughout the literature. Here we investigated the ability of thyroxine (T4) to preferentially stimulate collagen production, as compared with GAG, in articular chondrocyte-derived scaffold-free engineered cartilage. Dose response curves for T4 in pellet cultures showed that 25 ng/mL T4 increased the total collagen content without increasing the GAG content, resulting in a statistically significant increase in the collagen-to-GAG ratio, a fold change of 2.3 ± 1.2, p < 0.05. In contrast, another growth factor, TGFβ1, increased the GAG content in excess of threefold more than the increase in collagen. In large scaffold-free neocartilage, T4 also increased the total collagen/DNA at 1 month and at 2 months (fold increases of 2.1 ± 0.8, p < 0.01 and 2.1 ± 0.4, p < 0.001, respectively). Increases in GAG content were not statistically significant. The effect on collagen was largely specific to collagen type II, which showed a 2.8 ± 1.6-fold increase of COL2A1 mRNA expression (p < 0.01). Western blots confirmed a statistically significant increase in type II collagen protein at 1 month (fold increase of 2.2 ± 1.8); at 2 months, the fold increase of 3.7 ± 3.3 approached significance (p = 0.059). Collagen type X protein was less than the 0.1 μg limit of detection. T4 did not affect COL10A1 and COL1A2 gene expression in a statistically significant manner. Biglycan mRNA expression increased 2.6 ± 1.6-fold, p < 0.05. Results of this study show that an optimized dosage of T4 is able to increase collagen type II content, and do so preferential to GAG. Moreover, the upregulation of COL2A1 gene expression and type II collagen protein accumulation, without a concomitant increase in collagens type I or type X, signifies a direct enhancement of chondrogenesis of hyaline articular cartilage without the induction of terminal differentiation.
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Affiliation(s)
- G Adam Whitney
- 1 Department of Biomedical Engineering, Case Western Reserve University , Cleveland, Ohio.,2 Hope Heart Matrix Biology Program, Benaroya Research Institute , Seattle, Washington
| | - Thomas J Kean
- 3 Department of Orthopedic Surgery, Baylor College of Medicine , Houston, Texas
| | - Russell J Fernandes
- 4 Department of Orthopedics and Sports Medicine, University of Washington , Seattle, Washington
| | - Stephen Waldman
- 5 Department of Chemical Engineering, Faculty of Engineering and Architectural Science, Ryerson University , Toronto, Canada
| | - M Yat Tse
- 6 Department of Biomedical and Molecular Sciences, Queen's University , Kingston, Canada
| | - Stephen C Pang
- 6 Department of Biomedical and Molecular Sciences, Queen's University , Kingston, Canada
| | - Joseph M Mansour
- 7 Department of Mechanical and Aerospace Engineering, Case Western Reserve University , Cleveland, Ohio
| | - James E Dennis
- 1 Department of Biomedical Engineering, Case Western Reserve University , Cleveland, Ohio.,2 Hope Heart Matrix Biology Program, Benaroya Research Institute , Seattle, Washington.,3 Department of Orthopedic Surgery, Baylor College of Medicine , Houston, Texas
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15
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MacKay DL, Kean TJ, Bernardi KG, Whitney GA, Dennis JE, Lin F. Absence of complement protects against bone loss in a model of postmenopausal osteoporosis. Immunobiology 2016. [DOI: 10.1016/j.imbio.2016.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Kean TJ, Mera H, Whitney GA, MacKay DL, Awadallah A, Fernandes RJ, Dennis JE. Disparate response of articular- and auricular-derived chondrocytes to oxygen tension. Connect Tissue Res 2016; 57:319-33. [PMID: 27128439 PMCID: PMC4984267 DOI: 10.1080/03008207.2016.1182996] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE/AIM To determine the effect of reduced (5%) oxygen tension on chondrogenesis of auricular-derived chondrocytes. Currently, many cell and tissue culture experiments are performed at 20% oxygen with 5% carbon dioxide. Few cells in the body are subjected to this supra-physiological oxygen tension. Chondrocytes and their mesenchymal progenitors are widely reported to have greater chondrogenic expression when cultured at low, more physiological, oxygen tension (1-7%). Although generally accepted, there is still some controversy, and different culture methods, species, and outcome metrics cloud the field. These results are, however, articular chondrocyte biased and have not been reported for auricular-derived chondrocytes. MATERIALS AND METHODS Auricular and articular chondrocytes were isolated from skeletally mature New Zealand White rabbits, expanded in culture and differentiated in high density cultures with serum-free chondrogenic media. Cartilage tissue derived from aggregate cultures or from the tissue engineered sheets were assessed for biomechanical, glycosaminoglycan, collagen, collagen cross-links, and lysyl oxidase activity and expression. RESULTS Our studies show increased proliferation rates for both auricular and articular chondrocytes at low (5%) O2 versus standard (20%) O2. In our scaffold-free chondrogenic cultures, low O2 was found to increase articular chondrocyte accumulation of glycosaminoglycan, but not cross-linked type II collagen, or total collagen. Conversely, auricular chondrocytes accumulated less glycosaminoglycan, cross-linked type II collagen and total collagen under low oxygen tension. CONCLUSIONS This study highlights the dramatic difference in response to low O2 of chondrocytes isolated from different anatomical sites. Low O2 is beneficial for articular-derived chondrogenesis but detrimental for auricular-derived chondrogenesis.
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Affiliation(s)
- Thomas J. Kean
- Matrix Biology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA, USA,Department of Orthopedics, Case Western Reserve University, Cleveland, OH, USA,Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Hisashi Mera
- Matrix Biology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA, USA,Department of Orthopedics, Case Western Reserve University, Cleveland, OH, USA,Department of Health and Sports Sciences, Mukogawa Women’s University, Hyogo, Japan
| | - G. Adam Whitney
- Matrix Biology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA, USA,Department of Orthopedics, Case Western Reserve University, Cleveland, OH, USA
| | - Danielle L. MacKay
- Matrix Biology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA, USA,Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Amad Awadallah
- Department of Orthopedics, Case Western Reserve University, Cleveland, OH, USA
| | - Russell J. Fernandes
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, USA
| | - James E. Dennis
- Matrix Biology Program, Benaroya Research Institute at Virginia Mason, Seattle, WA, USA,Department of Orthopedics, Case Western Reserve University, Cleveland, OH, USA,Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX, USA
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17
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Abstract
Solving major, persistent public health problems requires new policies and more aggressive, sweeping interventions that affect large populations. We need well-conceived health policies and effective interventions for environmental change, but are we likely to get them? To find out, the Directors of Health Promotion and Education and the U.S. Centers for Disease Control and Prevention initiated a study of state and local public health agencies in the United States from 1996 through 1999. Data were collected by peer- and non-peer-reviewed literature searches, key informant interviews, reviews of Internet sites, and a nationwide survey. Study conclusions found confusion about the legitimacy of advocacy, lack of priority and funding for interventions that take more time versus quick fixes, variable leadership, reluctance to take risks, and a political climate that often discourages government agencies to take on these interventions. There are successes, yet more can be done.
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Affiliation(s)
- Neil E Hann
- Community Development Service, Oklahoma Department of Health, Oklahoma City, USA
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18
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Kean TJ, Dennis JE. Correction: Synoviocyte Derived-Extracellular Matrix Enhances Human Articular Chondrocyte Proliferation and Maintains Re-Differentiation Capacity at Both Low and Atmospheric Oxygen Tensions. PLoS One 2015; 10:e0138409. [PMID: 26367743 PMCID: PMC4569188 DOI: 10.1371/journal.pone.0138409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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19
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Balogh EP, Dresler C, Fleury ME, Gritz ER, Kean TJ, Myers ML, Nass SJ, Nevidjon B, Toll BA, Warren GW, Herbst RS. Reducing tobacco-related cancer incidence and mortality: summary of an institute of medicine workshop. Oncologist 2014; 19:21-31. [PMID: 24304712 PMCID: PMC3903060 DOI: 10.1634/theoncologist.2013-0230] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 09/24/2013] [Indexed: 11/17/2022] Open
Abstract
Tobacco use remains a serious and persistent national problem. Recognizing that progress in combating cancer will never be fully achieved without addressing the tobacco problem, the National Cancer Policy Forum of the Institute of Medicine convened a public workshop exploring current issues in tobacco control, tobacco cessation, and implications for cancer patients. Workshop participants discussed potential policy, outreach, and treatment strategies to reduce tobacco-related cancer incidence and mortality, and highlighted a number of potential high-value action items to improve tobacco control policy, research, and advocacy.
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20
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Lin P, Correa D, Kean TJ, Awadallah A, Dennis JE, Caplan AI. Serial transplantation and long-term engraftment of intra-arterially delivered clonally derived mesenchymal stem cells to injured bone marrow. Mol Ther 2013; 22:160-8. [PMID: 24067545 DOI: 10.1038/mt.2013.221] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 09/15/2013] [Indexed: 12/24/2022] Open
Abstract
It has been hypothesized that mesenchymal stem cells (MSCs) home to sites of injury. Nevertheless, efficient delivery of MSCs to target organs and description of their ultimate fate remain major challenges. We provide evidence that intra-arterially (IA) injected MSCs selectively engraft from the circulation as perivascular cells in the bone marrow (BM) after a localized radiation injury. Luciferase-expressing MSCs, derived from a conditionally immortalized clone (BMC-9) representing a pure population of cells, were arterially delivered into mice irradiated in one leg. Cell distribution was measured by bioluminescent imaging and final destination assessed by luciferase immunolocalization. IA injections resulted in engraftment only in the irradiated leg where cells localize and proliferate abluminal to the BM vasculature, a phenomenon not replicated with intravenous injections or with IA injections of kidney cells harvested from the same donor used for MSCs. Furthermore, MSCs harvested from the engrafted marrow and serially transplanted retain the ability to selectively engraft at sites of injury. This study demonstrates that MSCs can serially engraft at sites of injury from the circulation, that they reside in the perivascular space, and that arterial delivery is more efficient than venous delivery for cell engraftment.
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Affiliation(s)
- Paul Lin
- 1] Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA [2] Skeletal Research Center, Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Diego Correa
- Skeletal Research Center, Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Thomas J Kean
- Benaroya Research Institute, Seattle, Washington, USA
| | - Amad Awadallah
- Skeletal Research Center, Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | | | - Arnold I Caplan
- Skeletal Research Center, Department of Biology, Case Western Reserve University, Cleveland, Ohio, USA
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Kean TJ, Duesler L, Young RG, Dadabayev A, Olenyik A, Penn M, Wagner J, Fink DJ, Caplan AI, Dennis JE. Development of a peptide-targeted, myocardial ischemia-homing, mesenchymal stem cell. J Drug Target 2011; 20:23-32. [DOI: 10.3109/1061186x.2011.622398] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Bauer J, Liu RW, Kean TJ, Dennis JE, Petersilge W, Gilmore A. A comparison of five treatment protocols for contaminated bone grafts in reference to sterility and cell viability. J Bone Joint Surg Am 2011; 93:439-44. [PMID: 21368075 DOI: 10.2106/jbjs.j.00418] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Occasionally, a bone graft or comminuted fracture fragment is dropped on the operating-room floor and becomes contaminated. The purpose of this study was to determine an optimal method for sterilizing this bone with the minimum sacrifice of cell viability. METHODS A set of discarded bone samples was taken from a series of twenty total knee arthroplasty operations. The bone samples were uniformly contaminated with use of a bacterial broth prepared from culture samples taken from the operating-room floor. The bone samples in each set underwent five different decontamination procedures. Specifically, one sample in each set was autoclaved and four other samples underwent mechanical agitation in normal saline solution, 2% chlorhexidine gluconate, or 10% povidone-iodine (which was either left wet or was dried). Positive and negative controls were used for comparison. Ten sets were then cultured to determine sterility, and ten underwent live/dead trypan blue staining to determine cell viability. RESULTS Autoclaving, chlorhexidine gluconate, and dry povidone-iodine sterilized all samples; wet povidone-iodine decontaminated four (40%) of ten samples; and saline solution sterilized none. While all decontamination methods reduced the cell count to some extent, autoclaving and chlorhexidine gluconate left no viable cells. When the cell counts were expressed as a percentage of the control value, dry povidone-iodine sterilization maintained significantly fewer live cells than controls (21%; p < 0.01), whereas saline solution and wet povidone-iodine were not significantly different from controls (77% and 66%; p = 0.40 and p = 0.22, respectively). CONCLUSIONS Of the easily accessible protocols studied, mechanical agitation and serial washes of bone graft in povidone-iodine that is allowed to dry offers the best balance between complete sterilization of contaminated bone and maintenance of tissue viability.
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Affiliation(s)
- Jennifer Bauer
- University Hospital, Case Western Reserve University, Cleveland, Ohio, USA
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23
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Abstract
Cell surface coating is a methodology wherein specific molecules are transiently anchored onto cell membrane to modulate cell behavior. Cell surface coating was tested as a method to deliver mesenchymal stem cells (MSCs) to endothelial cells via binding to intercellular cell adhesion molecule-1 (ICAM-1). MSCs coated with palmitated protein G (PPG) followed by antibodies to ICAM-1 (Ab(ICAM-1)), and incubated on ICAM-I coated coverslips showed a 40-fold increase in cell binding over PPG-only controls. Ab(ICAM-1)-coated MSCs incubated with human vascular endothelial cells (HUVECs), with and without exposure to TNFalpha (to upregulate ICAM-1 expression), showed 2.6-fold increased binding to control HUVECs over PPG-only controls, and a 16-fold increase in binding to TNFalpha-treated HUVECs. Pretreatment of HUVECs with ICAM-1 antibody promoted the attachment of PPG-only MSCs while reducing the attachment of Ab(ICAM-1)-MSCs by approximately 50%. In flow chamber studies on TNFalpha-stimulated HUVECs, PPG-only, and MSC-only lost 80-90% of their initial binding at 4 dyne/cm(2), while Ab(ICAM-1)-MSCs maintained 100% binding at 4 dyne/cm(2) and 40% binding at 25 dyne/cm(2). These results demonstrate that cell surface coating promotes the attachment of MSCs to endothelial cells, and provides a methodology for the delivery of stem cells to sites of inflammation.
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Affiliation(s)
- In Kap Ko
- Department of Orthopaedics, Case Western Reserve University, Cleveland, OH, USA
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Laughter DC, Kean TJ, Dream KD, Esparza D, Hortobagyi G, Judkins A, Levitt DZ, Marcus C, Silverberg Y. The breast self-examination practices of high risk women: implications for patient education. Patient Couns Health Educ 1980; 3:103-7. [PMID: 10254297 DOI: 10.1016/s0738-3991(81)80004-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The breast self-examination (BSE) behavior of 142 women referred to a large cancer center with malignant or benign breast disease was investigated. The women were interviewed about their BSE practices and variables that may have influenced their BSE behavior. Those reporting prior BSE practice were asked to demonstrate their breast examination to a trained nurse, who rated their performance against a set of standard criteria. Although it might be assumed that these women have had more opportunity to become educated about BSE, results showed the ratings of the women's performances were uniformly poor. Less than half reported having formal instruction by a medical professional. This is of particular consequence considering that those women taught by a doctor or nurse performed significantly more BSE steps than did those taught in other ways. Women who were encouraged to do BSE by friends or relatives also performed significantly more steps. Based on the study findings, specific recommendations are made, which can be applied to the improvement of BSE educational programs.
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