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Lee MFH, Steffens D, Chung JHY, Posniak S, Cheng K, Clark J, Wallace G, Mukherjee P. Co-culture of chondrocytes and stem cells: a review of head and neck cell lines for cartilage regeneration. Cells Tissues Organs 2024:000538461. [PMID: 38513621 DOI: 10.1159/000538461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 03/16/2024] [Indexed: 03/23/2024] Open
Abstract
INTRODUCTION Bioprinting, using "bio-inks" consisting of living cells, supporting structures and biological motifs to create customized constructs, is an emerging technique that aims to overcome the challenges of cartilaginous reconstruction of head and neck structures. Several living cell lines and culturing methods have been explored as bio-inks with varying efficacy. Co-culture of primary chondrocytes and stem cells (SCs) is one technique, well established for degenerative joint disease treatment, with potential for use in expanding chondrocyte populations for bio-inks. This study aims to evaluate the techniques for co-culture of primary chondrocytes and SCs for head and neck cartilage regeneration. METHODS A literature review was performed through OVID/Web of Science/MEDLINE/BIOSIS Previews/Embase. Studies reporting on chondrocytes and SCs in conjunction with co-culture or cartilage regeneration were included. Studies not reporting on findings from chondrocytes/SCs of the head and neck were excluded. Extracted data included cell sources, co-culture ratios and histological, biochemical and clinical outcomes. RESULTS 15 studies met inclusion criteria. Auricular cartilage was the most common chondrocyte source (n=10), then nasal septum (n=5), articular (n=1) and tracheal cartilage (n=1). Bone marrow was the most common SC source (n=9) then adipose tissue (n=7). Techniques varied, with co-culture ratios ranging from 1:1 to 1:10. All studies reported co-culture to be superior to SC mono-culture by all outcomes. Most studies reported superiority or equivalence of co-culture to chondrocyte mono-culture by all outcomes. When comparing clinical outcomes, co-culture constructs were equivalent to chondrocyte mono-culture in diameter, and equivalent or inferior in wet weight and height. CONCLUSION Co-culture of primary chondrocytes and SCs is a promising technique for expanding chondrocyte populations, with at least equivalence to chondrocyte mono-culture and superior to SC mono-culture when seeded at the same chondrocyte densities. However, there remains a lack of consensus regarding the optimal cell sources and co-culture ratios.
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Chao Y, Han Y, Chen Z, Chu D, Xu Q, Wallace G, Wang C. Multiscale Structural Design of 2D Nanomaterials-based Flexible Electrodes for Wearable Energy Storage Applications. Adv Sci (Weinh) 2024; 11:e2305558. [PMID: 38115755 PMCID: PMC10916616 DOI: 10.1002/advs.202305558] [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: 08/09/2023] [Revised: 11/22/2023] [Indexed: 12/21/2023]
Abstract
2D nanomaterials play a critical role in realizing high-performance flexible electrodes for wearable energy storge devices, owing to their merits of large surface area, high conductivity and high strength. The electrode is a complex system and the performance is determined by multiple and interrelated factors including the intrinsic properties of materials and the structures at different scales from macroscale to atomic scale. Multiscale design strategies have been developed to engineer the structures to exploit full potential and mitigate drawbacks of 2D materials. Analyzing the design strategies and understanding the working mechanisms are essential to facilitate the integration and harvest the synergistic effects. This review summarizes the multiscale design strategies from macroscale down to micro/nano-scale structures and atomic-scale structures for developing 2D nanomaterials-based flexible electrodes. It starts with brief introduction of 2D nanomaterials, followed by analysis of structural design strategies at different scales focusing on the elucidation of structure-property relationship, and ends with the presentation of challenges and future prospects. This review highlights the importance of integrating multiscale design strategies. Finding from this review may deepen the understanding of electrode performance and provide valuable guidelines for designing 2D nanomaterials-based flexible electrodes.
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Affiliation(s)
- Yunfeng Chao
- Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou450052China
- Intelligent Polymer Research InstituteARC Centre of Excellence for Electromaterials ScienceAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2522Australia
| | - Yan Han
- Energy & Materials Engineering CentreCollege of Physics and Materials ScienceTianjin Normal UniversityTianjin300387China
| | - Zhiqi Chen
- Intelligent Polymer Research InstituteARC Centre of Excellence for Electromaterials ScienceAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2522Australia
| | - Dewei Chu
- School of Materials Science and EngineeringThe University of New South WalesSydneyNSW2052Australia
| | - Qun Xu
- Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou450052China
| | - Gordon Wallace
- Intelligent Polymer Research InstituteARC Centre of Excellence for Electromaterials ScienceAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2522Australia
| | - Caiyun Wang
- Intelligent Polymer Research InstituteARC Centre of Excellence for Electromaterials ScienceAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2522Australia
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Wu Q, Zhu F, Wallace G, Yao X, Chen J. Electrocatalysis of nitrogen pollution: transforming nitrogen waste into high-value chemicals. Chem Soc Rev 2024; 53:557-565. [PMID: 38099452 DOI: 10.1039/d3cs00714f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
On 16 June 2023, the United Nations Environment Programme highlighted the severity of nitrogen pollution faced by humans and called for joint action for sustainable nitrogen use. Excess nitrogenous waste (NW: NO, NO2, NO2-, NO3-, etc.) mainly arises from the use of synthetic fertilisers, wastewater discharge, and fossil fuel combustion. Although the amount of NW produced can be minimised by reducing the use of nitrogen fertilisers and fossil fuels, the necessity to feed seven billion people on Earth limits the utility of this approach. Compared to current industrial processes, electrocatalytic NW reduction or CO2-NW co-reduction offers a potentially greener alternative for recycling NW and producing high-value chemicals. However, upgrading this technology to connect upstream and downstream industrial chains is challenging. This viewpoint focuses on electrocatalytic NW reduction, a cutting-edge technology, and highlights the challenges in its practical application. It also discusses future directions to meet the requirements of upstream and downstream industries by optimising production processes, including the pretreatment and supply of nitrogenous raw materials (e.g. flue gas and sewage), design and macroscopic preparation of electrocatalysts, and upscaling of reactors and other auxiliary equipment.
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Affiliation(s)
- Qilong Wu
- Intelligent Polymer Research Institute, Australian Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia.
| | - Fangfang Zhu
- School of Advanced Energy, Shenzhen Campus, Sun Yat-Sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Gordon Wallace
- Intelligent Polymer Research Institute, Australian Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia.
| | - Xiangdong Yao
- School of Advanced Energy, Shenzhen Campus, Sun Yat-Sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Jun Chen
- Intelligent Polymer Research Institute, Australian Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia.
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Zhang S, Xu G, Wu J, Liu X, Fan Y, Chen J, Wallace G, Gu Q. Microphysiological Constructs and Systems: Biofabrication Tactics, Biomimetic Evaluation Approaches, and Biomedical Applications. Small Methods 2024; 8:e2300685. [PMID: 37798902 DOI: 10.1002/smtd.202300685] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/23/2023] [Indexed: 10/07/2023]
Abstract
In recent decades, microphysiological constructs and systems (MPCs and MPSs) have undergone significant development, ranging from self-organized organoids to high-throughput organ-on-a-chip platforms. Advances in biomaterials, bioinks, 3D bioprinting, micro/nanofabrication, and sensor technologies have contributed to diverse and innovative biofabrication tactics. MPCs and MPSs, particularly tissue chips relevant to absorption, distribution, metabolism, excretion, and toxicity, have demonstrated potential as precise, efficient, and economical alternatives to animal models for drug discovery and personalized medicine. However, current approaches mainly focus on the in vitro recapitulation of the human anatomical structure and physiological-biochemical indices at a single or a few simple levels. This review highlights the recent remarkable progress in MPC and MPS models and their applications. The challenges that must be addressed to assess the reliability, quantify the techniques, and utilize the fidelity of the models are also discussed.
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Affiliation(s)
- Shuyu Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, China
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine/Department of Fetal Medicine and Prenatal Diagnosis/BioResource Research Center, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Guoshi Xu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100049, China
| | - Juan Wu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100049, China
| | - Xiao Liu
- Department of Gastroenterology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yong Fan
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine/Department of Fetal Medicine and Prenatal Diagnosis/BioResource Research Center, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Jun Chen
- Intelligent Polymer Research Institute, Australian Institute for Innovative Materials, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500, Australia
| | - Gordon Wallace
- Intelligent Polymer Research Institute, Australian Institute for Innovative Materials, Innovation Campus, University of Wollongong, North Wollongong, NSW, 2500, Australia
| | - Qi Gu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Chaoyang District, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100049, China
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Chen Z, Chao Y, Sayyar S, Tian T, Wang K, Xu Y, Wallace G, Ding J, Wang C. Polyethylene Oxide (PEO) Provides Bridges to Silica Nanoparticles to Form a Shear Thickening Electrolyte for High Performance Impact Resistant Lithium-ion Batteries. Adv Sci (Weinh) 2023; 10:e2302844. [PMID: 37544891 PMCID: PMC10558684 DOI: 10.1002/advs.202302844] [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: 05/05/2023] [Revised: 07/18/2023] [Indexed: 08/08/2023]
Abstract
The development of shear thickening electrolytes is proving to be pivotal in the quest for impact resistant lithium-ion batteries (LIBs). However, the high viscosity and poor stability associated with the need for high filler content has to date impeded progress. Here, this work reports a new type of polymer-bridged shear thickening electrolyte that overcomes these shortcomings, by utilizing the interaction between polymer chains and silica nanoparticles. The incorporation of polyethylene oxide (PEO) facilitates hydrocluster formation providing impact resistance with a filler content as low as 2.2 wt%. This low viscosity electrolyte has a high ionic conductivity of ≈5.1 mS cm-1 with excellent long-term stability, over 30 days. The effectiveness of this electrolyte in LIBs is demonstrated by excellent electrochemical performance and high impact resistance.
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Affiliation(s)
- Zhiqi Chen
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
| | - Yunfeng Chao
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
| | - Sepidar Sayyar
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
- Australian National Fabrication Facility – Materials NodeInnovation CampusUniversity of WollongongWollongongNSW2500Australia
| | - Tongfei Tian
- School of ScienceTechnology and EngineeringUniversity of the Sunshine CoastSippy DownsQLD4556Australia
| | - Kezhong Wang
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
| | - Yeqing Xu
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
- Australian National Fabrication Facility – Materials NodeInnovation CampusUniversity of WollongongWollongongNSW2500Australia
| | - Jie Ding
- Platforms DivisionDefence Science & Technology Group506 Lorimer StreetFishermans BendVIC3207Australia
| | - Caiyun Wang
- ARC Centre of Excellence for Electromaterials ScienceIntelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongWollongongNSW2500Australia
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Chen Z, Liu X, You J, Tomaskovic-Crook E, Yue Z, Talaei A, Sutton G, Crook J, Wallace G. Electro-compacted collagen for corneal epithelial tissue engineering. J Biomed Mater Res A 2023; 111:1151-1160. [PMID: 36651651 DOI: 10.1002/jbm.a.37500] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 12/15/2022] [Accepted: 01/02/2023] [Indexed: 01/19/2023]
Abstract
Bioengineered corneal substitutes offer a solution to the shortage of donor corneal tissue worldwide. As one of the major structural components of the cornea, collagen has shown great potential for tissue-engineered cornea substitutes. Herein, free-standing collagen membranes fabricated using electro-compaction were assessed in corneal bioengineering application by comparing them with nonelectro-compacted collagen (NECC). The well-organized and biomimetic fibril structure resulted in a significant improvement in mechanical properties. A 10-fold increase in tensile and compressive modulus was recorded when compared with NECC membranes. In addition to comparable transparency in the visible light range, the glucose permeability of the electro-compacted collagen (ECC) membrane is higher than that of the native human cornea. Human corneal epithelial cells adhere and proliferate well on the ECC membrane, with a large cell contact area observed. The as-described ECC has appropriate structural, topographic, mechanical, optical, glucose permeable, and cell support properties to provide a platform for a bioengineered cornea; including the outer corneal epithelium and potentially deeper corneal tissues.
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Affiliation(s)
- Zhi Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
| | - Xiao Liu
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
| | - Jingjing You
- Lions New South Wales Eye Bank and New South Wales Bone Bank, New South Wales Organ and Tissue Donation Service, Sydney, New South Wales, Australia
| | - Eva Tomaskovic-Crook
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
- Arto Hardy Family Biomedical Innovation Hub, Chris O'Brien Lifehouse, Camperdown, New South Wales, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Zhilian Yue
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
| | - Alireza Talaei
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
| | - Gerard Sutton
- Lions New South Wales Eye Bank and New South Wales Bone Bank, New South Wales Organ and Tissue Donation Service, Sydney, New South Wales, Australia
- Save Sight Institute, University of Sydney, Sydney, New South Wales, Australia
- Chatswood Clinic, Vision Eye Institute, Sydney, New South Wales, Australia
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Jeremy Crook
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
- Arto Hardy Family Biomedical Innovation Hub, Chris O'Brien Lifehouse, Camperdown, New South Wales, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Fairy Meadow, New South Wales, Australia
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Abstract
RNA-based therapeutics have shown tremendous promise in disease intervention at the genetic level, and some have been approved for clinical use, including the recent COVID-19 messenger RNA vaccines. The clinical success of RNA therapy is largely dependent on the use of chemical modification, ligand conjugation or non-viral nanoparticles to improve RNA stability and facilitate intracellular delivery. Unlike molecular-level or nanoscale approaches, macroscopic hydrogels are soft, water-swollen three-dimensional structures that possess remarkable features such as biodegradability, tunable physiochemical properties and injectability, and recently they have attracted enormous attention for use in RNA therapy. Specifically, hydrogels can be engineered to exert precise spatiotemporal control over the release of RNA therapeutics, potentially minimizing systemic toxicity and enhancing in vivo efficacy. This Review provides a comprehensive overview of hydrogel loading of RNAs and hydrogel design for controlled release, highlights their biomedical applications and offers our perspectives on the opportunities and challenges in this exciting field of RNA delivery.
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Affiliation(s)
- Ruibo Zhong
- Center for Nanomedicine and Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Sepehr Talebian
- Faculty of Engineering, School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, Australia
- Nano Institute (Sydney Nano), The University of Sydney, Sydney, New South Wales, Australia
| | - Bárbara B Mendes
- ToxOmics, NOVA Medical School Faculdade de Ciências Médicas, NMS FCM, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, North Wollongong, New South Wales, Australia
| | - Robert Langer
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - João Conde
- ToxOmics, NOVA Medical School Faculdade de Ciências Médicas, NMS FCM, Universidade NOVA de Lisboa, Lisbon, Portugal.
| | - Jinjun Shi
- Center for Nanomedicine and Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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Stack JP, Fries RC, Kruckman L, Kadotani S, Wallace G. Galectin-3 as a novel biomarker in cats with hypertrophic cardiomyopathy. J Vet Cardiol 2023; 48:54-62. [PMID: 37480722 DOI: 10.1016/j.jvc.2023.06.003] [Citation(s) in RCA: 1] [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] [Received: 07/15/2022] [Revised: 06/13/2023] [Accepted: 06/23/2023] [Indexed: 07/24/2023]
Abstract
INTRODUCTION/OBJECTIVES Galectin-3 (Gal-3) is a circulating biomarker of fibrosis. In humans, increased Gal-3 is predictive of myocardial fibrosis and adverse cardiac events. The aim of this study was to evaluate the potential for Gal-3 as a cardiac biomarker in cats with hypertrophic cardiomyopathy (HCM). MATERIALS AND METHODS Eighty cats were enrolled (25 healthy cats with normal hearts, 35 with HCM American College of Veterinary Internal Medicine (ACVIM) stage B, and 21 with HCM ACVIM stage C). Each cat received a full echocardiogram, health panel, and total thyroxin level. Galectin-3 levels were measured for each enrolled patient. Troponin I and N-terminal pro-brain natriuretic peptide (NT-proBNP) were obtained for the majority of cats. Additionally, 17 ACVIM stage B cats underwent cardiac-gated magnetic resonance (CMR) imaging to assess myocardial extracellular volume (ECV), a noninvasive measure of myocardial fibrosis. RESULTS Galectin-3 levels are increased in cats with HCM ACVIM stage B and C compared to healthy cats; however, no significant differences were detected between ACVIM stage B and ACVIM stage C cats. In HCM-affected cats, Galectin-3 showed statistically significant correlations with left atrial dimensions, left atrial:aorta ratio, and CMR-derived ECV. Quantitative NT-proBNP showed excellent discrimination between all groups and troponin I was able to discriminate between ACVIM stage C and normal cats, but not between other groups. CONCLUSIONS Circulating Gal-3 levels are increased in cats with HCM and is positively correlated with left atrial dimensions and ECV in affected cats. Further studies evaluating the relationship between Gal-3, myocardial fibrosis, and clinical outcomes are warranted.
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Affiliation(s)
- J P Stack
- VCA Loomis Basin Veterinary Clinic, Loomis, CA, USA
| | - R C Fries
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign College of Veterinary Medicine, Urbana, IL, USA.
| | - L Kruckman
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign College of Veterinary Medicine, Urbana, IL, USA
| | - S Kadotani
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign College of Veterinary Medicine, Urbana, IL, USA
| | - G Wallace
- Pacific Northwest Pet ER and Specialty Center, Vancouver, WA, USA
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O'Sullivan O, Barker-Davies RM, Thompson K, Bahadur S, Gough M, Lewis S, Martin M, Segalini A, Wallace G, Phillip R, Cranley M. Rehabilitation post-COVID-19: cross-sectional observations using the Stanford Hall remote assessment tool. BMJ Mil Health 2023; 169:243-248. [PMID: 34039689 PMCID: PMC8159670 DOI: 10.1136/bmjmilitary-2021-001856] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/14/2021] [Indexed: 01/10/2023]
Abstract
INTRODUCTION The multisystem COVID-19 can cause prolonged symptoms requiring rehabilitation. This study describes the creation of a remote COVID-19 rehabilitation assessment tool to allow timely triage, assessment and management. It hypotheses those with post-COVID-19 syndrome, potentially without laboratory confirmation and irrespective of initial disease severity, will have significant rehabilitation needs. METHODS Cross-sectional study of consecutive patients referred by general practitioners (April-November 2020). Primary outcomes were presence/absence of anticipated sequelae. Binary logistic regression was used to test association between acute presentation and post-COVID-19 symptomatology. RESULTS 155 patients (n=127 men, n=28 women, median age 39 years, median 13 weeks post-illness) were assessed using the tool. Acute symptoms were most commonly shortness of breath (SOB) (74.2%), fever (73.5%), fatigue (70.3%) and cough (64.5%); and post-acutely, SOB (76.7%), fatigue (70.3%), cough (57.4%) and anxiety/mood disturbance (39.4%). Individuals with a confirmed diagnosis of COVID-19 were 69% and 63% less likely to have anxiety/mood disturbance and pain, respectively, at 3 months. CONCLUSIONS Rehabilitation assessment should be offered to all patients suffering post-COVID-19 symptoms, not only those with laboratory confirmation and considered independently from acute illness severity. This tool offers a structure for a remote assessment. Post-COVID-19 programmes should include SOB, fatigue and mood disturbance management.
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Affiliation(s)
- Oliver O'Sullivan
- Academic Department of Military Rehabilitation, Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, LE12 5BL, UK
- Headquarters Army Medical Services (HQ AMS), Camberley, UK
| | - R M Barker-Davies
- Academic Department of Military Rehabilitation, Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, LE12 5BL, UK
- School of Sport Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - K Thompson
- Headquarters Army Medical Services (HQ AMS), Camberley, UK
| | - S Bahadur
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - M Gough
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - S Lewis
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - M Martin
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - A Segalini
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - G Wallace
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - R Phillip
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
| | - M Cranley
- Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK
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Jia X, Ma X, Zhao L, Xin M, Hao Y, Sun P, Wang C, Chao D, Liu F, Wang C, Lu G, Wallace G. A biocompatible and fully erodible conducting polymer enables implanted rechargeable Zn batteries. Chem Sci 2023; 14:2123-2130. [PMID: 36845924 PMCID: PMC9944696 DOI: 10.1039/d2sc06342e] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/23/2023] [Indexed: 01/26/2023] Open
Abstract
Implanted rechargeable batteries that can provide energy over a sufficient lifetime and ultimately degrade into non-toxic byproducts are highly desirable. However, their advancement is significantly impeded by the limited toolbox of electrode materials with a known biodegradation profile and high cycling stability. Here we report biocompatible, erodible poly(3,4-ethylenedioxythiophene) (PEDOT) grafted with hydrolyzable carboxylic acid pendants. This molecular arrangement combines the pseudocapacitive charge storage from the conjugated backbones and dissolution via hydrolyzable side chains. It demonstrates complete erosion under aqueous conditions in a pH-dependent manner with a predetermined lifetime. The compact rechargeable Zn battery with a gel electrolyte offers a specific capacity of 31.8 mA h g-1 (57% of theoretical capacity) and outstanding cycling stability (78% capacity retention over 4000 cycles at 0.5 A g-1). Subcutaneous implantation of this Zn battery into Sprague-Dawley (SD) rats demonstrates complete biodegradation in vivo and biocompatibility. This molecular engineering strategy presents a viable avenue for developing implantable conducting polymers with a predetermined degradation profile and high energy storage capability.
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Affiliation(s)
- Xiaoteng Jia
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China
| | - Xuenan Ma
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China
| | - Li Zhao
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China
| | - Meiying Xin
- Jilin Provincial Key Laboratory of Pediatric Neurology, Department of Pediatric Neurology, The First Hospital of Jilin University130021China
| | - Yulei Hao
- Jilin Provincial Key Laboratory of Pediatric Neurology, Department of Pediatric Neurology, The First Hospital of Jilin University130021China
| | - Peng Sun
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China
| | - Chenguang Wang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China
| | - Danming Chao
- College of Chemistry, Jilin UniversityChangchun 130012China
| | - Fangmeng Liu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China
| | - Caiyun Wang
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Faculty, University of Wollongong Wollongong NSW 2522 Australia
| | - Geyu Lu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012 China .,International Center of Future Science, Jilin University Changchun 130012 China
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Faculty, University of Wollongong Wollongong NSW 2522 Australia
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11
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Zhou Y, Jia X, Pang D, Jiang S, Zhu M, Lu G, Tian Y, Wang C, Chao D, Wallace G. An integrated Mg battery-powered iontophoresis patch for efficient and controllable transdermal drug delivery. Nat Commun 2023; 14:297. [PMID: 36653362 PMCID: PMC9849227 DOI: 10.1038/s41467-023-35990-7] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 01/11/2023] [Indexed: 01/19/2023] Open
Abstract
Wearable transdermal iontophoresis eliminating the need for external power sources offers advantages for patient-comfort when deploying epidermal diseases treatments. However, current self-powered iontophoresis based on energy harvesters is limited to support efficient therapeutic administration over the long-term operation, owing to the low and inconsistent energy supply. Here we propose a simplified wearable iontophoresis patch with a built-in Mg battery for efficient and controllable transdermal delivery. This system decreases the system complexity and form factors by using viologen-based hydrogels as an integrated drug reservoir and cathode material, eliminating the conventional interface impedance between the electrode and drug reservoir. The redox-active polyelectrolyte hydrogel offers a high energy density of 3.57 mWh cm-2, and an optimal bioelectronic interface with ultra-soft nature and low tissue-interface impedance. The delivery dosage can be readily manipulated by tuning the viologen hydrogel and the iontophoresis stimulation mode. This iontophoresis patch demonstrates an effective treatment of an imiquimod-induced psoriasis mouse. Considering the advantages of being a reliable and efficient energy supply, simplified configuration, and optimal electrical skin-device interface, this battery-powered iontophoresis may provide a new non-invasive treatment for chronic epidermal diseases.
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Affiliation(s)
- Yan Zhou
- College of Chemistry, Jilin University, Changchun, 130012, China
| | - Xiaoteng Jia
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China.
| | - Daxin Pang
- College of Animal Sciences, Jilin University, Changchun, 130062, China
| | - Shan Jiang
- College of Chemistry, Jilin University, Changchun, 130012, China
| | - Meihua Zhu
- College of Chemistry, Jilin University, Changchun, 130012, China
| | - Geyu Lu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China.,International Center of Future Science, Jilin University, Changchun, 130012, China
| | - Yaping Tian
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, 130021, China.
| | - Caiyun Wang
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, North Wollongong, NSW, Australia.
| | - Danming Chao
- College of Chemistry, Jilin University, Changchun, 130012, China.
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, North Wollongong, NSW, Australia
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12
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Hai AM, Yue Z, Beirne S, Wallace G. Electrowriting of silk fibroin: Towards
3D
fabrication for tissue engineering applications. J Appl Polym Sci 2022. [DOI: 10.1002/app.53349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Abdul Moqeet Hai
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus University of Wollongong Wollongong New South Wales Australia
- Institute of Polymer and Textile Engineering University of the Punjab Lahore Pakistan
| | - Zhilian Yue
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus University of Wollongong Wollongong New South Wales Australia
| | - Stephen Beirne
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus University of Wollongong Wollongong New South Wales Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus University of Wollongong Wollongong New South Wales Australia
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13
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You J, Frazer H, Sayyar S, Chen Z, Liu X, Taylor A, Filippi B, Beirne S, Wise I, Petsoglou C, Hodge C, Wallace G, Sutton G. Development of an In Situ Printing System With Human Platelet Lysate-Based Bio-Adhesive to Treat Corneal Perforations. Transl Vis Sci Technol 2022; 11:26. [PMID: 35767274 PMCID: PMC9251791 DOI: 10.1167/tvst.11.6.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Corneal perforation is a clinical emergency that can result in blindness. Currently corneal perforations are treated either by cyanoacrylate glue which is toxic to corneal cells, or by using commercial fibrin glue for small perforations. Both methods use manual delivery which lead to uncontrolled application of the glues to the corneal surface. Therefore, there is a need to develop a safe and effective alternative to artificial adhesives. Methods Previously, our group developed a transparent human platelet lysate (hPL)-based biomaterial that accelerated corneal epithelial cells healing in vitro. This biomaterial was further characterized in this study using rheometry and adhesive test, and a two-component delivery system was developed for its application. An animal trial (5 New Zealand white rabbits) to compare impact of the biomaterial and cyanoacrylate glue (control group) on a 2 mm perforation was conducted to evaluate safety and efficacy. Results The hPL-based biomaterial showed higher adhesiveness compared to commercial fibrin glue. Treatment rabbits had lower pain scores and faster recovery, despite generating similar scar-forming structure compared to controls. No secondary corneal ulcer was generated in rabbits treated with the bio-adhesive. Conclusions This study reports an in situ printing system capable of delivering a hPL-based, transparent bio-adhesive and successfully treating small corneal perforations. The bio-adhesive-treated rabbits recovered faster and required no additional analgesia. Translational Relevance The developed in situ hPL bio-adhesives treatment represents a new format of treating corneal perforation that is easy to use, allows for accurate application, and can be a potentially effective and pain relief treatment.
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Affiliation(s)
- Jingjing You
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia
| | - Hannah Frazer
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia
| | - Sepidar Sayyar
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia.,Australian National Fabrication Facility - Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Zhi Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia
| | - Xiao Liu
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia
| | - Adam Taylor
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia.,Australian National Fabrication Facility - Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Benjamin Filippi
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia.,Australian National Fabrication Facility - Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Stephen Beirne
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia.,Australian National Fabrication Facility - Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Innes Wise
- Laboratory Animal Services, University of Sydney, Sydney, Australia
| | - Constantinos Petsoglou
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia.,New South Wales Tissue Bank, Sydney, Australia
| | - Chris Hodge
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia.,New South Wales Tissue Bank, Sydney, Australia.,Vision Eye Institute, Chatswood, New South Wales, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, New South Wales, Australia.,Australian National Fabrication Facility - Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Gerard Sutton
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia.,New South Wales Tissue Bank, Sydney, Australia.,Vision Eye Institute, Chatswood, New South Wales, Australia
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14
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O'Sullivan B, Kippen R, Wearne E, Wallace G, Taylor C, Toukhsati SR. Enabling uptake and sustainability of supervision roles by women GPs in Australia: a narrative analysis of interviews. BMC Med Educ 2022; 22:398. [PMID: 35606778 PMCID: PMC9128131 DOI: 10.1186/s12909-022-03459-8] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Worldwide, the proportion of women entering careers in medicine is increasing. To ensure diversity and capacity in the general practice ("GP") supervision workforce, a greater understanding from the perspective of women GPs engaged in or considering the clinical supervision of trainee doctors is important. This narrative inquiry aims to explore the uptake and sustainability of supervision roles for women GPs in the Australian context. METHODS Qualitative interviews with Australian women GPs were conducted between July and September 2021. Women GPs were selected to represent a range of demographics, practice contexts, and supervision experience to promote broad perspectives. Narrative analysis drew on participant perspectives, allowing emergent stories to be explored using story arcs based on the characters, settings, problems, actions, and resolutions. These stories were evaluated by a broad research team and a high level of agreement of the final narratives and counter-narratives was achieved. RESULTS Of the 25 women who enrolled, 17 completed interviews. Six narratives emerged, including: power and control, pay, time, other life commitments, quality of supervision, and supervisor identity. These represented significant intersecting issues with the potential to impact the uptake and sustainability of supervision by women GPs. Some women GPs reported a lack of agency to make decisions about their role in supervision and were not remunerated for teaching. Uptake and sustainability of supervision was constrained by other life commitments, which could be buffered by team-sharing arrangements and a supportive practice. Although adding a burden of time atop their complex and sensitive consultations, women GPs were committed to being available to registrars and supervising at a high standard. To foster high quality supervision, women GPs were interested in up-skilling resources, building experience and harnessing support networks. Women sensed imposter syndrome when negotiating a supervisor identity, which could be managed by explicitly valuing their contribution. CONCLUSION The findings can inform the development of more specific resources, supports and structures to enable women GPs in Australia to uptake and sustain the supervision of trainee doctors at a level they find both acceptable and rewarding.
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Affiliation(s)
- B O'Sullivan
- General Practice Supervisors Australia, Bendigo, Victoria, 3550, Australia
- Monash University, Bendigo, Victoria, 3550, Australia
| | - R Kippen
- Monash University, Bendigo, Victoria, 3550, Australia
| | - E Wearne
- Eastern Victoria GP Training, Hawthorn, Victoria, 3122, Australia
| | - G Wallace
- General Practice Supervisors Australia, Bendigo, Victoria, 3550, Australia
| | - C Taylor
- General Practice Supervisors Australia, Bendigo, Victoria, 3550, Australia
| | - S R Toukhsati
- General Practice Supervisors Australia, Bendigo, Victoria, 3550, Australia.
- Monash University, Bendigo, Victoria, 3550, Australia.
- Melbourne University, Parkville, Victoria, 3052, Australia.
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15
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Harte S, Singh Y, Malone S, Heussler H, Wallace G. Cannabidiol and refractory epilepsy: parental and caregiver perspectives of participation in a compassionate access scheme. BMC Health Serv Res 2022; 22:173. [PMID: 35144615 PMCID: PMC8832815 DOI: 10.1186/s12913-022-07592-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 01/31/2022] [Indexed: 11/30/2022] Open
Abstract
Background The Compassionate Access Scheme (CAS) being delivered through the Queensland Children’s Hospital is designed to allow access to an investigational purified Cannabidiol oral solution to paediatric patients with severe refractory epilepsy. The objectives of this study were to conduct semi-structured interviews to: 1. Understand families’ expectations and attitudes about the use of an investigational cannabinoid product for their child’s seizures; 2. Understand families’ perceptions of Cannabidiol’s efficacy for their child’s seizures; and other aspects of their child’s behaviour, quality of life and/or cognition. Methods Children aged 2-18 years had been enrolled in, or were enrolled in a compassionate access scheme for Cannabidiol at the time of the study. Semi-structured interviews (n = 19) with parents or caregivers (n = 23) of children diagnosed with refractory epilepsy were voice-recorded, transcribed and analysed to generate common themes. Results Key themes emerged relating to seizure activity, family and school engagement, drug safety and legal access, efficacy, clinical support, social acceptance of the medication and program delivery. The use of Cannabidiol was perceived to have benefits in relation to reducing the severity and frequency of seizure activity for almost a third of patients experiencing refractory epilepsy. Participants described other benefits including improved social engagement, wakefulness and a reduction of side effects related to a reduction of conventional medication dosage. Conclusion This study provided unique perspectives of families’ experiences managing untreatable epilepsy, their experiences with conventional and experimental pharmacological treatments and health services. Whilst families’ perceptions showed the use of Cannabidiol did not provide a therapeutic reduction in the seizure activity for all patients diagnosed with refractory epilepsy, it’s use as an additional pharmacological agent was perceived to provide other benefits by some patient families.
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Affiliation(s)
- S Harte
- The University of Queensland, School of Medicine, Brisbane, Australia.
| | - Y Singh
- Queensland Children's Hospital, South Brisbane, Australia
| | - S Malone
- Queensland Children's Hospital, South Brisbane, Australia
| | - H Heussler
- Queensland Children's Hospital, South Brisbane, Australia.
| | - G Wallace
- Queensland Children's Hospital, South Brisbane, Australia
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16
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Zhou Y, Fan Y, Chen Z, Yue Z, Wallace G. Catechol functionalized ink system and thrombin-free fibrin gel for fabricating cellular constructs with mechanical support and inner micro channels. Biofabrication 2021; 14. [PMID: 34638119 DOI: 10.1088/1758-5090/ac2ef8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 05/12/2021] [Accepted: 10/12/2021] [Indexed: 12/17/2022]
Abstract
The development of 3D bio printing technology has contributed to protocols for the repair and regeneration of tissues in recent years. However, it is still a great challenge to fabricate structures that mimic the complexity of native tissue, including both the biomechanics and microscale internal structure. In this study, a catechol functionalized ink system was developed to produce tough and elastic scaffolds with built-in micro channels that simulate the vascular structure. And a skin model was designed to evaluate the cytocompatibility of the scaffolds. The mechanical support stemmed from the double network based on catechol-hyaluronic acid (HACA) and alginate, the micro channels were generated using sacrificial gelatin. HACA/alginate and gelatin were firstly printed using a 3D extrusion printer. Thrombin-free fibrinogen were then mixed with human dermal fibroblasts and introduced to the printed scaffolds to induce gelation. An immortal human keratinocyte cell line was introduced on top of the cellular construct to mimic the full thickness skin structure. The printed scaffolds demonstrated high elasticity and supported the formation of a double-layered cell-laden skin like structure. The results suggest the 3D printing platform developed here provides a platform for skin regeneration and could be explored further to engineer functional skin tissue by incorporation of other types of cells.
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Affiliation(s)
- Ying Zhou
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Yuchao Fan
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Zhi Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Zhilian Yue
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
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17
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Bruschi A, Donati DM, Choong P, Lucarelli E, Wallace G. Dielectric Elastomer Actuators, Neuromuscular Interfaces, and Foreign Body Response in Artificial Neuromuscular Prostheses: A Review of the Literature for an In Vivo Application. Adv Healthc Mater 2021; 10:e2100041. [PMID: 34085772 DOI: 10.1002/adhm.202100041] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 01/11/2021] [Revised: 05/06/2021] [Indexed: 12/14/2022]
Abstract
The inability to replace human muscle in surgical practice is a significant challenge. An artificial muscle controlled by the nervous system is considered a potential solution for this. Here, this is defined as a neuromuscular prosthesis. Muscle loss and dysfunction related to musculoskeletal oncological impairments, neuromuscular diseases, trauma or spinal cord injuries can be treated through artificial muscle implantation. At present, the use of dielectric elastomer actuators working as capacitors appears a promising option. Acrylic or silicone elastomers with carbon nanotubes functioning as the electrode achieve mechanical performances similar to human muscle in vitro. However, mechanical, electrical, and biological issues have prevented clinical application to date. Here materials and mechatronic solutions are presented which can tackle current clinical problems associated with implanting an artificial muscle controlled by the nervous system. Progress depends on the improvement of the actuation properties of the elastomer, seamless or wireless integration between the nervous system and the artificial muscle, and on reducing the foreign body response. It is believed that by combining the mechanical, electrical, and biological solutions proposed here, an artificial neuromuscular prosthesis may be a reality in surgical practice in the near future.
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Affiliation(s)
- Alessandro Bruschi
- 3rd Orthopaedic and Traumatologic Clinic prevalently Oncologic IRCCS Istituto Ortopedico Rizzoli Via Pupilli 1 Bologna 40136 Italy
| | - Davide Maria Donati
- 3rd Orthopaedic and Traumatologic Clinic prevalently Oncologic IRCCS Istituto Ortopedico Rizzoli Via Pupilli 1 Bologna 40136 Italy
| | - Peter Choong
- University of Melbourne–Department of Surgery St. Vincent's Hospital Fitzroy Melbourne Victoria 3065 Australia
| | - Enrico Lucarelli
- Unit of Orthopaedic Pathology and Osteoarticular Tissue Regeneration 3rdOrthopaedic and Traumatologic Clinic Prevalently Oncologic IRCCS Istituto Ortopedico Rizzoli Via di Barbiano 1/10 Bologna 40136 Italy
| | - Gordon Wallace
- Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials Science AIIM Facility University of Wollongong Wollongong NSW 2522 Australia
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18
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Sideris A, Wallace G, Lam M, Kitipornchai L, Lewis R, Jones A, Jeiranikhameneh A, Hingley L, Beirne S, Mackay SG. 268 Smart polymer implants as an emerging technology for treating airway collapse in OSA: a proof of concept study. Sleep 2021. [DOI: 10.1093/sleep/zsab072.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Implantable 3D printed ‘smart’ polymers are an emerging technology with potential applications in treating collapse in adult obstructive sleep apnea through mechanical airway manipulation. There is a paucity of devices that are commercially available or in research and development stage. Limited studies have investigated the use of implantable smart polymers in reversing the collapsibility of the pharyngeal airway by creating counter forces during sleep. This paper describes an application of implantable magnetic polymer technology in an in-vivo porcine model. Study Objectives: To assess the use of a novel magnetic polymer implant in reversing airway collapse and identifying potential anatomical targets for airway implant surgery in an in-vivo porcine model.
Methods
Target sites of airway collapse were genioglossus muscle, hyoid bone and middle constrictor. Magnetic polymer implants were sutured to these sites and external magnetic forces, through magnets with pull forces rated at 102kg and 294kg, were applied at the skin. The resultant airway movement was assessed via nasendoscopy. Pharyngeal plexus branches to the middle constrictor muscle were stimulated at 0.5mA, 1.0mA and 2.0mA and airway movement assessed via nasendoscopy.
Results
At the genioglossus muscles large magnetic forces were required to produce airway movement. At the hyoid bone, anterior movement of the airway was noted when using a 294kg rated magnet. At the middle constrictor muscle, an anterolateral (or rotatory) pattern of airway movement was noted when using the same magnet. Stimulation of pharyngeal plexus branches to the middle constrictor revealed contraction and increasing rigidity of the lateral walls of the airway as stimulation amplitude increased. The resultant effect was prevention of collapse, a previously unidentified pattern of airway movement.
Conclusion
Surgically implanted smart polymers are an emerging technology showing promise in the treatment of airway collapse in obstructive sleep apnea. Future research should investigate their biomechanical role as an adjunct to treatment of airway collapse through nerve stimulation.
Support (if any)
Garnett-Passe and Rodney Williams Memorial Foundation, Conjoint Grant, 2016-18.
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Affiliation(s)
| | - Gordon Wallace
- ARC Centre for Excellence for Electromaterials Science Intelligent Polymer Research Institute University of Wollongong Innovation Campus
| | | | - Leon Kitipornchai
- Department of Otolaryngology Head and Neck Surgery The Wollongong Hospital
| | | | | | - Ali Jeiranikhameneh
- ARC Centre for Excellence for Electromaterials Science Intelligent Polymer Research Institute University of Wollongong Innovation Campus
| | - Lachlan Hingley
- ARC Centre for Excellence for Electromaterials Science Intelligent Polymer Research Institute University of Wollongong Innovation Campus
| | - Stephen Beirne
- ARC Centre for Excellence for Electromaterials Science Intelligent Polymer Research Institute University of Wollongong Innovation Campus
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19
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Zhou Y, Liu Y, Buckingham MA, Zhang S, Aldous L, Beirne S, Wallace G, Chen J. The significance of supporting electrolyte on poly (vinyl alcohol)–iron(II)/iron(III) solid-state electrolytes for wearable thermo-electrochemical cells. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.106938] [Citation(s) in RCA: 11] [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: 10/22/2022] Open
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20
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Abstract
INTRODUCTION Long term results of ossiculoplasty surgery are considered poor with displacement and extrusion amongst the common reasons for failure. Application of 3Dimensional (3D) printing may help overcome some of these barriers, however digital methods to attain accurate 3D morphological studies of ossicular anatomy are lacking, exacerbated by the limitation of resolution of clinical imaging. METHODS 20 human cadaveric temporal bones were assessed using micro computed tomography (CT) imaging to demonstrate the lowest resolution required for accurate 3D reconstruction. The bones were then scanned using conebeam CT (125 μm) and helical CT (0.6 mm). 3D reconstruction using clinical imaging techniques with microCT imaging (40 μm resolution) as a reference was assessed. The incus was chosen as the focus of study. Two different methods of 3D printing techniques were assessed. RESULTS A minimum resolution of 100 μm was needed for adequate 3D reconstruction of the ossicular chain. Conebeam CT gave the most accurate data on 3D analysis, producing the smallest mean variation in surface topography data relative to microCT (mean difference 0.037 mm, p < 0.001). Though the incus varied in shape in between people, paired matches were identical. Thus, the contralateral side can be used for 3D printing source data if the ipsilateral incus is missing. Laser based 3D printing was superior to extrusion based printing to achieve the resolution demands for 3D printed ossicles. CONCLUSION Resolution of modern imaging allows 3D reconstructions and 3D printing of human ossicles with good accuracy, though it is important to pay attention to thresholding during this process.
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Affiliation(s)
- Payal Mukherjee
- RPA Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Kai Cheng
- RPA Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Johnson Chung
- ARC Centre of Excellence for Electromaterial Science, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, Australia
| | - Stuart M Grieve
- Department of Radiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
- Imaging and Phenotyping Laboratory, Charles Perkins Centre, Faculty of Medicine and Health, The University of Sydney, Australia, 2006
| | - Michael Solomon
- RPA Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, NSW, Australia
- Surgical Outcomes Research Centre (SOuRCe) and Department of Colorectal Surgery, Royal Prince Alfred Hospital, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterial Science, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, Australia
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21
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Sideris AW, Wallace G, Lam ME, Kitipornchai L, Lewis R, Jones A, Jeiranikhameneh A, Beirne S, Hingley L, Mackay S. Smart polymer implants as an emerging technology for treating airway collapse in obstructive sleep apnea: a pilot (proof of concept) study. J Clin Sleep Med 2021; 17:315-324. [PMID: 33118930 DOI: 10.5664/jcsm.8946] [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] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES To assess the use of a novel magnetic polymer implant in reversing airway collapse and identify potential anatomical targets for airway implant surgery in an in vivo porcine model. METHODS Target sites of airway collapse were genioglossus muscle, hyoid bone, and middle constrictor muscle. Magnetic polymer implants were sutured to these sites, and external magnetic forces, through magnets with pull forces rated at 102 kg and 294 kg, were applied at the skin. The resultant airway movement was assessed via nasendoscopy. Pharyngeal plexus branches to the middle constrictor muscle were stimulated at 0.5 mA, 1.0 mA, and 2.0 mA and airway movement assessed via nasendoscopy. RESULTS At the genioglossus muscles, large magnetic forces were required to produce airway movement. At the hyoid bone, anterior movement of the airway was noted when using a 294 kg rated magnet. At the middle constrictor muscle, an anterolateral (or rotatory) pattern of airway movement was noted when using the same magnet. Stimulation of pharyngeal plexus branches to the middle constrictor revealed contraction and increasing rigidity of the lateral walls of the airway as stimulation amplitude increased. The resultant effect was prevention of collapse as opposed to typical airway dilation, a previously unidentified pattern of airway movement. CONCLUSIONS Surgically implanted smart polymers are an emerging technology showing promise in the treatment of airway collapse in obstructive sleep apnea. Future research should investigate their biomechanical role as an adjunct to treatment of airway collapse through nerve stimulation.
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Affiliation(s)
- Anders William Sideris
- Department of Otolaryngology Head and Neck Surgery, The Wollongong Hospital, Wollongong, New South Wales, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District Wollongong, New South Wales, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, New South Wales, Australia
| | - Matthew Eugene Lam
- Department of Otolaryngology Head and Neck Surgery, The Wollongong Hospital, Wollongong, New South Wales, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District Wollongong, New South Wales, Australia
| | - Leon Kitipornchai
- Department of Otolaryngology Head and Neck Surgery, The Wollongong Hospital, Wollongong, New South Wales, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District Wollongong, New South Wales, Australia
| | - Richard Lewis
- Department of Otolaryngology Head and Neck Surgery, Royal Perth Hospital, Perth, Western Australia, Australia
| | - Andrew Jones
- Illawarra ENT Head and Neck Clinic, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District Wollongong, New South Wales, Australia
| | - Ali Jeiranikhameneh
- ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, New South Wales, Australia
| | - Stephen Beirne
- ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, New South Wales, Australia
| | - Lachlan Hingley
- School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia
| | - Stuart Mackay
- Department of Otolaryngology Head and Neck Surgery, The Wollongong Hospital, Wollongong, New South Wales, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District Wollongong, New South Wales, Australia.,School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia
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22
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Sanz B, Albillos Sanchez A, Tangey B, Gilmore K, Yue Z, Liu X, Wallace G. Light Cross-Linkable Marine Collagen for Coaxial Printing of a 3D Model of Neuromuscular Junction Formation. Biomedicines 2020; 9:16. [PMID: 33375335 PMCID: PMC7823301 DOI: 10.3390/biomedicines9010016] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/27/2022] Open
Abstract
Collagen is a major component of the extracellular matrix (ECM) that modulates cell adhesion, growth, and migration, and has been utilised in tissue engineering applications. However, the common terrestrial sources of collagen carry the risk of zoonotic disease transmission and there are religious barriers to the use of bovine and porcine products in many cultures. Marine based collagens offer an attractive alternative and have so far been under-utilized for use as biomaterials for tissue engineering. Marine collagen can be extracted from fish waste products, therefore industry by-products offer an economical and environmentally sustainable source of collagen. In a handful of studies, marine collagen has successfully been methacrylated to form collagen methacrylate (ColMA). Our work included the extraction, characterization and methacrylation of Red Snapper collagen, optimisation of conditions for neural cell seeding and encapsulation using the unmodified collagen, thermally cross-linked, and the methacrylated collagen with UV-induced cross-linking. Finally, the 3D co-axial printing of neural and skeletal muscle cell cultures as a model for neuromuscular junction (NMJ) formation was investigated. Overall, the results of this study show great potential for a novel NMJ in vitro 3D bioprinted model that, with further development, could provide a low-cost, customizable, scalable and quick-to-print platform for drug screening and to study neuromuscular junction physiology and pathogenesis.
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Affiliation(s)
| | | | | | | | | | | | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Squires Way, Wollongong, New South Wales 2500, Australia; (B.S.); (A.A.S.); (B.T.); (K.G.); (Z.Y.); (X.L.)
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23
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Frazer H, You J, Chen Z, Sayyar S, Liu X, Taylor A, Hodge C, Wallace G, Sutton G. Development of a Platelet Lysate-Based Printable, Transparent Biomaterial With Regenerative Potential for Epithelial Corneal Injuries. Transl Vis Sci Technol 2020; 9:40. [PMID: 33442494 PMCID: PMC7779874 DOI: 10.1167/tvst.9.13.40] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 08/21/2020] [Accepted: 11/17/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose To develop a human platelet lysate (hPL)–based bioink that is transparent and also encompasses the regenerative properties of hPL to facilitate wound healing. Methods The effect of different batches of hPLand fetal bovine serum (FBS) on corneal epithelial cell growth and scratch assay was first examined using Incucyte Zoom. Various combinations of human fibrinogen (concentration range from 0.2 to 5 mg/mL) and thrombin (concentration from 1 to 10 U/mL) were combined with hPL to generate nine types of potential bioink. Rheology, transparency, and cell compatibility of bioinks were assessed and compared. The final selected bioink was used in an ex vivo corneal model to examine its ability in re-epithelization. Results No significant difference was detected in cell proliferation and wound healing tests between different hPL batches at the same concentration. Scratch assay data showed that hPL had significantly higher effect on wound healing than FBS. Comparing across the nine bioinks, bioink 5 consisting of 10% hPL, 2 mg/mL fibrinogen, and 5 U/mL thrombin demonstrated all required mechanical and cellular properties and was able to regenerate the full-thickness epithelium ex vivo. Conclusions The results showed that a transparent and adhesive bioink can be generated by combining hPL, fibrinogen, and thrombin together. The bioink can be directly applied to a human cornea to promote corneal re-epithelization with huge potential applications in corneal injuries. Translational Relevance The developed transparent hPL-based ink with its adhesive and healing ability showed that it could be used as a new treatment option for corneal injuries.
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Affiliation(s)
- Hannah Frazer
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia
| | - Jingjing You
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia
| | - Zhi Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Sepidar Sayyar
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia.,Australian National Fabrication Facility-Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Xiao Liu
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Adam Taylor
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Chris Hodge
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia.,ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia.,NSW Tissue Bank, Sydney, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia.,Australian National Fabrication Facility-Materials Node, Innovation Campus, University of Wollongong, Wollongong, Australia
| | - Gerard Sutton
- Save Sight Institute, Sydney Medical School, University of Sydney, Sydney, Australia.,ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, Wollongong, Australia.,NSW Tissue Bank, Sydney, Australia
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24
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Zhou Y, Yue Z, Chen Z, Wallace G. 3D Coaxial Printing Tough and Elastic Hydrogels for Tissue Engineering Using a Catechol Functionalized Ink System. Adv Healthc Mater 2020; 9:e2001342. [PMID: 33103357 DOI: 10.1002/adhm.202001342] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 07/30/2020] [Revised: 10/05/2020] [Indexed: 12/31/2022]
Abstract
3D printing is now popular in tissue engineering as it provides a facile route to the fabrication of scaffolds with/without living cells with a predesigned geometry. The properties of the ink constituents are critical for printing structures to meet both mechanical and biological requirements. Despite recent advances in ink development, it remains a challenge to print biopolymer based tough and elastic hydrogels. These hydrogels are in great demand as they can mimic the biomechanics of soft tissues such as skin, muscle, and cartilage. In this study, a catechol functionalized ink system is developed for 3D coaxial printing tough and elastic hydrogels. The ink is based on biopolymers including catechol modified hyaluronic acid (HACA) and alginate. A novel crosslinking strategy is proposed, involving simple ionic crosslinking, catechol mediated crosslinking, and Michael addition that are all induced under mild conditions. The HACA and alginate form a double network with high fracture toughness and elasticity, while proteins such as gelatin can be integrated with the HACA/alginate hydrogel during printing to improve cell interactions. The printed constructs demonstrate high cytocompatibility and support the differentiation of myoblasts into aligned myotubes. The catechol functionalized ink can be further modified to target various applications in soft tissue engineering.
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Affiliation(s)
- Ying Zhou
- ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute Innovation Campus University of Wollongong Wollongong NSW 2522 Australia
| | - Zhilian Yue
- ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute Innovation Campus University of Wollongong Wollongong NSW 2522 Australia
| | - Zhi Chen
- ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute Innovation Campus University of Wollongong Wollongong NSW 2522 Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute Innovation Campus University of Wollongong Wollongong NSW 2522 Australia
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25
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Tootell A, Kyriazis E, Billsberry J, Ambrosini V, Garrett-Jones S, Wallace G. Knowledge creation in complex inter-organizational arrangements: understanding the barriers and enablers of university-industry knowledge creation in science-based cooperation. JKM 2020. [DOI: 10.1108/jkm-06-2020-0461] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Purpose
This study aims to explore the factors undergirding knowledge creation in the university-industry complex inter-organizational arrangement. It builds upon social capital and relationship marketing theories.
Design/methodology/approach
This study uses a qualitative research design. In total, 36 innovation champions involved in knowledge creation were interviewed to provide detailed insights into the process. A thematic analysis of the in-depth interviews was conducted.
Findings
The principal finding was that opportunistic behavior was a significant barrier to knowledge creation. In severe cases, the knowledge creation process was destroyed, resulting in lost investment. Principled behavior and investment in affect-based and cognition-based trust, through five critical trust development activities, provided the best path to successful knowledge creation.
Originality/value
This study contributes to the knowledge management literature by providing insights into the enablers and barriers to the formation of cooperation, a crucial antecedent to knowledge creation literature. It also affords practical implications for innovation managers and policymakers on how they can improve knowledge creation by using social capital and relationship marketing theory in complex inter-organizational arrangements.
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26
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Ullah A, Heneidi S, Biddinger P, Patel N, Wehrle C, Sinkler M, Klaassen Z, Kruse E, Nichols F, Wallace G. Paraneoplastic Limbic Encephalitis Secondary To Mixed Non-Seminomatous Germ Cell Tumours. Am J Clin Pathol 2020. [DOI: 10.1093/ajcp/aqaa161.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Casestudy: Testicular tumors account for 1–2% of all tumors in men, with 95% of these being germ cell tumors. The main risk factor for the development of testicular cancer is cryptorchidism. Paraneoplastic limbic encephalitis is a rare sequela of testicular tumor associated with anti-Ma2 and KLH11 antibodies. The most effective treatment for paraneoplastic limbic encephalitis is treatment of the primary malignancy.
We present a 41-year-old male that presented to the emergency department with two weeks of episodic alteration of consciousness and memory disturbances. Negative neurologic evaluation and imaging led to concern for a paraneoplastic process from a distant malignancy. CT imaging revealed an enlarged, necrotic para-aortic lymph node and subsequent ultrasound demonstrated a right sided testicular mass. Right radical orchiectomy was performed.
Microscopically, the mass consisted of mixed respiratory epithelium, gastrointestinal glands and squamous epithelium with keratinization consistent with a post-pubertal testicular teratoma with associated in-situ germ cell neoplasia.
Resection of the para-aortic mass revealed large anaplastic cells with epithelioid features, nuclear pleomorphism and frequent mitoses. Immunostaining was positive for Pan-Keratin and OCT4, consistent with poorly differentiated embryonal carcinoma. Resection of the primary and metastatic disease, as well as treatment with corticosteroids resulted in resolution of the encephalitis.
This presentation of severe neurological disturbances in the setting of a metastatic mixed nonseminomatous germ cell tumor represents a rare presentation of paraneoplastic limbic encephalitis.
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Affiliation(s)
- A Ullah
- Pathology, Medical college of Georgia at Augusta university, Augusta, Georgia, UNITED STATES
| | - S Heneidi
- Pathology, Medical college of Georgia at Augusta university, Augusta, Georgia, UNITED STATES
| | - P Biddinger
- Pathology, Medical college of Georgia at Augusta university, Augusta, Georgia, UNITED STATES
| | - N Patel
- Pathology, Medical college of Georgia at Augusta university, Augusta, Georgia, UNITED STATES
| | - C Wehrle
- Medical College of Georgia, Augusta, Georgia, UNITED STATES
| | - M Sinkler
- Medical College of Georgia, Augusta, Georgia, UNITED STATES
| | - Z Klaassen
- Surgery, Medical College of Georgia at Augusta University, Augusta, Georgia, UNITED STATES
| | - E Kruse
- Surgery, Medical College of Georgia at Augusta University, Augusta, Georgia, UNITED STATES
| | - F Nichols
- Neurology, Medical College of Gerogia at Augusta University, Augusta, Georgia, UNITED STATES
| | - G Wallace
- Neurology, Medical College of Gerogia at Augusta University, Augusta, Georgia, UNITED STATES
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27
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Thompson TP, Horrell J, Taylor AH, Wanner A, Husk K, Wei Y, Creanor S, Kandiyali R, Neale J, Sinclair J, Nasser M, Wallace G. Physical activity and the prevention, reduction, and treatment of alcohol and other drug use across the lifespan (The PHASE review): A systematic review. Ment Health Phys Act 2020; 19:100360. [PMID: 33020704 PMCID: PMC7527800 DOI: 10.1016/j.mhpa.2020.100360] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 12/22/2022]
Abstract
The aim of this review is to systematically describe and quantify the effects of PA interventions on alcohol and other drug use outcomes, and to identify any apparent effect of PA dose and type, possible mechanisms of effect, and any other aspect of intervention delivery (e.g. key behaviour change processes), within a framework to inform the design and evaluation of future interventions. Systematic searches were designed to identify published and grey literature on the role of PA for reducing the risk of progression to alcohol and other drug use (PREVENTION), supporting individuals to reduce alcohol and other drug use for harm reduction (REDUCTION), and promote abstinence and relapse prevention during and after treatment of alcohol and other drug use (TREATMENT). Searches identified 49,518 records, with 49,342 excluded on title and abstract. We screened 176 full text articles from which we included 32 studies in 32 papers with quantitative results of relevance to this review. Meta-analysis of two studies showed a significant effect of PA on prevention of alcohol initiation (risk ratio [RR]: 0.72, 95%CI: 0.61 to 0.85). Meta-analysis of four studies showed no clear evidence for an effect of PA on alcohol consumption (Standardised Mean Difference [SMD]: 0.19, 95%, Confidence Interval -0.57 to 0.18). We were unable to quantitatively examine the effects of PA interventions on other drug use alone, or in combination with alcohol use, for prevention, reduction or treatment. Among the 19 treatment studies with an alcohol and other drug use outcome, there was a trend for promising short-term effect but with limited information about intervention fidelity and exercise dose, there was a moderate to high risk of bias. We identified no studies reporting the cost-effectiveness of interventions. More rigorous and well-designed research is needed. Our novel approach to the review provides a clearer guide to achieve this in future research questions addressed to inform policy and practice for different populations and settings.
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Affiliation(s)
- T P Thompson
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - J Horrell
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - A H Taylor
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - A Wanner
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - K Husk
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - Y Wei
- University of Plymouth, Centre for Mathematical Sciences, School of Engineering, Computing and Mathematics, Drake Circus, Plymouth, PL4 8AA, UK
| | - S Creanor
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - R Kandiyali
- Bristol University, School of Social and Community Medicine, Oakfield Grove, Clifton, Bristol, BS8 2BN, UK
| | - J Neale
- King's College London Addictions Department, Institute of Psychiatry, Psychology and Neuroscience, Denmark Hill, London, SE5 8BB, UK
| | - J Sinclair
- University of Southampton, Faculty of Medicine, 4-12 Terminus Terrace, Southampton, SO14 3DT, UK
| | - M Nasser
- Faculty of Health, Medicine, Dentistry & Human Sciences University of Plymouth, Plymouth Science Park Derriford, Plymouth, PL6 8BX, UK
| | - G Wallace
- Plymouth City Council, Public Dispensary, Catherine Street, Plymouth, PL1 2AA, UK
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28
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Pirovano P, Dorrian M, Shinde A, Donohoe A, Brady AJ, Moyna NM, Wallace G, Diamond D, McCaul M. A wearable sensor for the detection of sodium and potassium in human sweat during exercise. Talanta 2020; 219:121145. [PMID: 32887090 DOI: 10.1016/j.talanta.2020.121145] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [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: 04/01/2020] [Revised: 05/02/2020] [Accepted: 05/08/2020] [Indexed: 12/20/2022]
Abstract
The SwEatch platform, a wearable sensor for sampling and measuring the concentration of electrolytes in human sweat in real time, has been improved in order to allow the sensing of two analytes. The solid contact ion-sensitive electrodes (ISEs) for the detection of Na+ and K+ have been developed in two alternative formulations, containing either poly(3,4-ethylenedioxythiophene) (PEDOT) or poly(3-octylthiophene-2,5-diyl) (POT) as a conductive polymer transducing component. The solution-processable POT formulation simplifies the fabrication process, and sensor to sensor reproducibility has been improved via partial automation using an Opentron® automated pipetting robot. The resulting electrodes showed good sensitivity (52.4 ± 6.3 mV/decade (PEDOT) and 56.4 ± 2.2 mV/decade (POT) for Na+ ISEs, and 45.7 ± 7.4 mV/decade (PEDOT) and 54.3 ± 1.5 mV/decade (POT) for K+) and excellent selectivity towards potential interferents present in human sweat (H+, Na+, K+, Mg2+, Ca2+). The 3D printed SwEatch platform has been redesigned to incorporate a double, mirrored fluidic unit which is capable of drawing sweat from the skin through passive capillary action and bring it in contact with two independent electrodes. The potentiometric signal generated by the electrodes is measured by an integrated electronics board, digitised and transmitted via Bluetooth to a laptop. The results obtained from on-body trials on athletes during cycling show a relatively small increase in sodium (1.89 mM-2.97 mM) and potassium (3.31 mM-7.25 mM) concentrations during the exercise period of up to 90 min.
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Affiliation(s)
- Paolo Pirovano
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Matthew Dorrian
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Akshay Shinde
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Andrew Donohoe
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Aidan J Brady
- School of Health and Human Performance, Dublin City University, Dublin 9, Ireland
| | - Niall M Moyna
- School of Health and Human Performance, Dublin City University, Dublin 9, Ireland
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Dermot Diamond
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Margaret McCaul
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland.
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29
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Kemp S, Coles‐Black J, Walker MJ, Wallace G, Chuen J, Mukherjee P. Ethical and regulatory considerations for surgeons as consumers and creators of three‐dimensional printed medical devices. ANZ J Surg 2020; 90:1477-1481. [DOI: 10.1111/ans.15871] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/03/2020] [Accepted: 03/09/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Sharon Kemp
- Institute of Academic SurgeryRoyal Prince Alfred Hospital Sydney New South Wales Australia
| | - Jasamine Coles‐Black
- 3D Medical Printing LaboratoryAustin Health Melbourne Victoria Australia
- The University of Melbourne Melbourne Victoria Australia
| | - Mary J. Walker
- Department of Religion and PhilosophyHong Kong Baptist University Kowloon Hong Kong
- Department of PhilosophyMonash University Melbourne Victoria Australia
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research InstituteThe University of Wollongong Wollongong New South Wales Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research InstituteThe University of Wollongong Wollongong New South Wales Australia
| | - Jason Chuen
- 3D Medical Printing LaboratoryAustin Health Melbourne Victoria Australia
- The University of Melbourne Melbourne Victoria Australia
| | - Payal Mukherjee
- Institute of Academic SurgeryRoyal Prince Alfred Hospital Sydney New South Wales Australia
- Department of Otolaryngology‐Head and Neck SurgeryThe University of Sydney Sydney New South Wales Australia
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30
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Hingley L, Jeiranikhameneh A, Beirne S, Peoples G, Jones A, Sayyar S, Eastwood P, Lewis R, Wallace G, MacKay SG. Modeling the upper airway: A precursor to personalized surgical interventions for the treatment of sleep apnea. J Biomed Mater Res A 2020; 108:1419-1425. [PMID: 32134556 DOI: 10.1002/jbm.a.36913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 08/03/2019] [Revised: 02/20/2020] [Accepted: 02/24/2020] [Indexed: 02/06/2023]
Abstract
An accurate benchtop model was developed to mimic the different forms of human upper airway collapse in adult sleep apnea patients. This was done via modeling the airway through digital imaging. Airway representative models were then produced in two steps via a customized pneumatic extrusion 3D printing system. This allowed the pressure of collapse and planes of collapse to be manipulated to accurately represent those seen in sleep apnea patients. The pressure flow relationships of the collapsible airways were then studied by inserting the collapsible airways into a module that allowed the chamber pressure (Pc ) around the airways to be increased in order to cause collapse. Airways collapsed at physiologically relevant pressures (5.32-9.58 cmH2 O). Nickel and iron magnetic polymers were then printed into the airway in order to investigate the altering of the airway collapse. The introduction of the nickel and iron magnetic polymers increased the pressure of collapse substantially (7.38-17.51 cmH2 O). Finally, the force produced by the interaction of the magnetic polymer and the magnetic module was studied by measuring a sample of the magnetic airways. The peak force in (48.59-163.34 cN) and the distance over which the forces initially registered (6.8-9.7 mm) were measured using a force transducer. This data set may be used to inform future treatment of sleep apnea, specifically the production of an implantable polymer for surgical intervention.
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Affiliation(s)
- Lachlan Hingley
- School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia
| | - Ali Jeiranikhameneh
- Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales, Australia
| | - Stephen Beirne
- Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales, Australia
| | - Gregory Peoples
- School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia
| | - Andrew Jones
- School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District, Wollongong, New South Wales, Australia
| | - Sepidar Sayyar
- Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales, Australia
| | - Peter Eastwood
- Centre for Sleep Science, School of Human Sciences, University of Western Australia, Perth, Western Australia, Australia.,West Australian Sleep Disorders Research Institute, Sir Charles Gardiner Hospital, Perth, Western Australia, Australia
| | - Richard Lewis
- Department of Otolaryngology Head & Neck Surgery, Royal Perth Hospital, Perth, Western Australia, Australia
| | - Gordon Wallace
- Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales, Australia
| | - Stuart G MacKay
- School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia.,Illawarra Shoalhaven Local Health District, Wollongong, New South Wales, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, New South Wales, Australia
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31
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Wang X, Molino BZ, Pitkänen S, Ojansivu M, Xu C, Hannula M, Hyttinen J, Miettinen S, Hupa L, Wallace G. 3D Scaffolds of Polycaprolactone/Copper-Doped Bioactive Glass: Architecture Engineering with Additive Manufacturing and Cellular Assessments in a Coculture of Bone Marrow Stem Cells and Endothelial Cells. ACS Biomater Sci Eng 2019; 5:4496-4510. [PMID: 33438415 DOI: 10.1021/acsbiomaterials.9b00105] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 11/30/2022]
Abstract
The local delivery of Cu2+ from copper-doped bioactive glass (Cu-BaG) was combined with 3D printing of polycaprolactone (PCL) scaffolds for its potent angiogenic effect in bone tissue engineering. PCL and Cu-BaG were, respectively, dissolved and dispersed in acetone to formulate a moderately homogeneous ink. The PCL/Cu-BaG scaffolds were fabricated via direct ink writing into a cold ethanol bath. The architecture of the printed scaffolds, including strut diameter, strut spacing, and porosity, were investigated and characterized. The PCL/Cu-BaG scaffolds showed a Cu-BaG content-dependent mechanical property, as the compressive Young's modulus ranged from 7 to 13 MPa at an apparent porosity of 60%. The ion dissolution behavior in simulated body fluid was evaluated, and the hydroxyapatite-like precipitation on the strut surface was confirmed. Furthermore, the cytocompatibility of the PCL/Cu-BaG scaffolds was assessed in human bone marrow stem cell (hBMSC) culture, and a dose-dependent cytotoxicity of Cu2+ was observed. Here, the PCL/BaG scaffold induced the higher expression of late osteogenic genes OSTEOCALCIN and DLX5 in comparison to the PCL scaffold. The doping of Cu2+ in BaG elicited higher expression of the early osteogenic marker gene RUNX2a but decreased the expression of late osteogenic marker genes OSTEOCALCIN and DLX5 in comparison to the PCL/BaG scaffold, demonstrating the suppressing effect of Cu2+ on osteogenic differentiation of hBMSCs. In a coculture of hBMSCs and human umbilical vein endothelial cells, both the PCL/BaG and PCL/Cu-BaG scaffolds stimulated the formation of a denser tubule network, compared to the PCL scaffold. Meanwhile, only slightly higher gene expression of vWF was observed with the PCL/Cu-BaG scaffold than with the PCL/BaG scaffold, indicating the potent angiogenic effect of the released Cu2+.
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Affiliation(s)
- Xiaoju Wang
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Piispankatu 8, 20500 Turku, Finland
| | - Binbin Zhang Molino
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Northfields Avenue, Wollongong, New South Wales 2522, Australia
| | - Sanna Pitkänen
- Adult Stem Cell Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, P.O. BOX 100, FI-33014 Tampere, Finland.,Research, Development and Innovation Centre, Tampere University Hospital, Arvo Ylpön katu 6, P.O. BOX 2000, FI-33521 Tampere, Finland
| | - Miina Ojansivu
- Adult Stem Cell Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, P.O. BOX 100, FI-33014 Tampere, Finland.,Research, Development and Innovation Centre, Tampere University Hospital, Arvo Ylpön katu 6, P.O. BOX 2000, FI-33521 Tampere, Finland
| | - Chunlin Xu
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Piispankatu 8, 20500 Turku, Finland
| | - Markus Hannula
- Computational Biophysics and Imaging Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland
| | - Jari Hyttinen
- Computational Biophysics and Imaging Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland
| | - Susanna Miettinen
- Adult Stem Cell Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, P.O. BOX 100, FI-33014 Tampere, Finland.,Research, Development and Innovation Centre, Tampere University Hospital, Arvo Ylpön katu 6, P.O. BOX 2000, FI-33521 Tampere, Finland
| | - Leena Hupa
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Piispankatu 8, 20500 Turku, Finland
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Northfields Avenue, Wollongong, New South Wales 2522, Australia
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Lefebvre G, Honey L, Hines K, Keough A, Roye C, Bellemare S, Piscione TD, Falconer A, Shepherd L, Thorne S, Wallace G, Calder LA. Implementing Obstetrics Quality Improvement, Driven by Medico-legal Risk, is Associated With Improved Workplace Culture. J Obstet Gynaecol Can 2019; 42:38-47.e5. [PMID: 31416705 DOI: 10.1016/j.jogc.2019.05.011] [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] [Received: 01/07/2019] [Revised: 05/10/2019] [Accepted: 05/15/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This study implemented a quality improvement program based on knowledge of medico-legal risk in obstetrics and sought to evaluate the impact of this program on workplace culture. METHODS The study conducted needs assessments with front-line providers working in the obstetrical unit of the Queensway Carleton Hospital, an urban community hospital in Ottawa, Ontario, and included the safety, communication, operational reliability, and engagement (SCORE) survey. The study investigators delivered training in quality improvement science and co-developed three projects that were based on their alignment with local needs and aggregate medico-legal risk data: an organized team response to the need for an immediate cesarean section, a protocol for managing patients who present at term with pre-labour rupture of membranes, and regular morning team briefings. Outcome measures were determined for each project from a quality improvement indicator framework, and coaching was provided to project leads. Participants completed the SCORE survey and a program effectiveness tool after the intervention. RESULTS The majority of participants (75.2% of 153 pre-intervention and 63.1% of 157 post-intervention participants) completed the SCORE surveys. Post-intervention improvements were found in teamwork, learning environment, and safety climate, whereas levels of provider burnout remained high. Program effectiveness was highly rated, and most projects showed qualitative improvements. CONCLUSION This study showed positive workplace culture change associated with the quality improvement intervention. Lessons learned from the implementation of this program can inform future quality improvement initiatives.
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Affiliation(s)
- Guylaine Lefebvre
- Practice Improvement, Canadian Medical Protective Association, Ottawa, ON
| | - Liisa Honey
- Department of Obstetrics & Gynecology, Queensway Carleton Hospital, Ottawa, ON
| | - Kristen Hines
- Medical Care Analytics, Canadian Medical Protective Association, Ottawa, ON
| | - Annette Keough
- Safe Medical Care, Canadian Medical Protective Association, Ottawa, ON
| | - Charmaine Roye
- Systems Strategy and Engagement, Canadian Medical Protective Association, Ottawa, ON
| | - Steven Bellemare
- Practice Improvement, Canadian Medical Protective Association, Ottawa, ON
| | - Tino D Piscione
- Practice Improvement, Canadian Medical Protective Association, Ottawa, ON
| | - Andrew Falconer
- (Former) Chief of Staff, Queensway Carleton Hospital, Ottawa, ON
| | - Lynne Shepherd
- Department of Obstetrics & Gynecology, Queensway Carleton Hospital, Ottawa, ON
| | - Susan Thorne
- Department of Obstetrics & Gynecology, Queensway Carleton Hospital, Ottawa, ON
| | - Gordon Wallace
- Safe Medical Care, Canadian Medical Protective Association, Ottawa, ON
| | - Lisa A Calder
- Medical Care Analytics, Canadian Medical Protective Association, Ottawa, ON; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON.
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Sayyar S, Moskowitz J, Fox B, Wiggins J, Wallace G. Wet‐spinning and carbonization of graphene/PAN‐based fibers: Toward improving the properties of carbon fibers. J Appl Polym Sci 2019. [DOI: 10.1002/app.47932] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sepidar Sayyar
- ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute, AIIM Facility, Innovation CampusUniversity of Wollongong New South Wales 2500 Australia
| | - Jeremy Moskowitz
- School of Polymer Science and EngineeringUniversity of Southern Mississippi 118 College Drive #5050, Hattiesburg Mississippi 39406
| | - Bronwyn Fox
- Manufacturing Futures Research Institute, Swinburne Research/Faculty of ScienceEngineering and Technology Hawthorn Victoria 3122 Australia
| | - Jeffrey Wiggins
- School of Polymer Science and EngineeringUniversity of Southern Mississippi 118 College Drive #5050, Hattiesburg Mississippi 39406
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute, AIIM Facility, Innovation CampusUniversity of Wollongong New South Wales 2500 Australia
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Abstract
Novel approaches that incorporate electrofluidic and microfluidic technologies are reviewed to illustrate the translation of traditional enclosed structures into open and accessible textile based platforms. Through the utilization of on-fiber and on-textile microfluidics, it is possible to invert the typical enclosed capillary column or microfluidic "chip" platform, to achieve surface accessible efficient separations and fluid handling, while maintaining a microfluidic environment. The open fiber/textile based fluidics approach immediately provides new possibilities to interrogate, manipulate, redirect, extract, characterize, and quantify solutes and target species at any point in time during such processes as on-fiber electrodriven separations. This approach is revolutionary in its simplicity and provides many potential advantages not otherwise afforded by the more traditional enclosed platforms.
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Affiliation(s)
- Syamak Farajikhah
- ARC Centre of Excellence in Electromaterials Science (ACES), AIIM Facility, Innovation Campus, University of Wollongong, New South Wales 2500, Australia
| | - Joan M. Cabot
- Australian Centre for Research on Separation Science (ACROSS) and ARC Centre of Excellence for Electromaterials Science (ACES), School of Natural Sciences, Faculty of Chemistry, University of Tasmania, Tasmania 7005, Australia
| | - Peter C. Innis
- ARC Centre of Excellence in Electromaterials Science (ACES), AIIM Facility, Innovation Campus, University of Wollongong, New South Wales 2500, Australia
- Australian National Fabrication Facility − Materials Node, Innovation Campus, University of Wollongong, New South Wales 2522, Australia
| | - Brett Paull
- Australian Centre for Research on Separation Science (ACROSS) and ARC Centre of Excellence for Electromaterials Science (ACES), School of Natural Sciences, Faculty of Chemistry, University of Tasmania, Tasmania 7005, Australia
| | - Gordon Wallace
- ARC Centre of Excellence in Electromaterials Science (ACES), AIIM Facility, Innovation Campus, University of Wollongong, New South Wales 2500, Australia
- Australian National Fabrication Facility − Materials Node, Innovation Campus, University of Wollongong, New South Wales 2522, Australia
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35
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Wang K, Frewin CL, Esrafilzadeh D, Yu C, Wang C, Pancrazio JJ, Romero-Ortega M, Jalili R, Wallace G. High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes. Adv Mater 2019; 31:e1805867. [PMID: 30803072 DOI: 10.1002/adma.201805867] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/10/2019] [Indexed: 05/24/2023]
Abstract
Fabrication of flexible and free-standing graphene-fiber- (GF-) based microelectrode arrays with a thin platinum coating, acting as a current collector, results in a structure with low impedance, high surface area, and excellent electrochemical properties. This modification results in a strong synergistic effect between these two constituents leading to a robust and superior hybrid material with better performance than either graphene electrodes or Pt electrodes. The low impedance and porous structure of the GF results in an unrivalled charge injection capacity of 10.34 mC cm-2 with the ability to record and detect neuronal activity. Furthermore, the thin Pt layer transfers the collected signals along the microelectrode efficiently. In vivo studies show that microelectrodes implanted in the rat cerebral cortex can detect neuronal activity with remarkably high signal-to-noise ratio (SNR) of 9.2 dB in an area as small as an individual neuron.
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Affiliation(s)
- Kezhong Wang
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Christopher L Frewin
- Department of Bioengineering, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW, 2031, Australia
| | - Changchun Yu
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Caiyun Wang
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Joseph J Pancrazio
- Department of Bioengineering, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Mario Romero-Ortega
- Department of Bioengineering, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Rouhollah Jalili
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2031, Australia
| | - Gordon Wallace
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
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36
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Mukherjee P, Clark J, Wallace G, Cheng K, Solomon M, Richardson A, Maddern G. Discussion paper on proposed new regulatory changes on 3D technology: a surgical perspective. ANZ J Surg 2019; 89:117-121. [PMID: 30665261 DOI: 10.1111/ans.14946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 10/07/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Payal Mukherjee
- Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.,University of Sydney, Sydney, New South Wales, Australia
| | - Jonathan Clark
- Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.,University of Sydney, Sydney, New South Wales, Australia.,Department of Head and Neck Surgery, Sydney Head and Neck Cancer Institute, Chris O'Brien Lifehouse, Sydney, New South Wales, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, New South Wales, Australia
| | - Kai Cheng
- Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.,University of Sydney, Sydney, New South Wales, Australia
| | - Michael Solomon
- Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.,University of Sydney, Sydney, New South Wales, Australia.,Surgical Outcomes Research Centre (SOuRCe), Sydney, New South Wales, Australia.,Department of Colorectal Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Arthur Richardson
- University of Sydney, Sydney, New South Wales, Australia.,Westmead Hospital, Sydney, New South Wales, Australia
| | - Guy Maddern
- Division of Surgery, University of Adelaide, Queen Elizabeth Hospital, Adelaide, South Australia, Australia.,Australian Safety and Efficacy Register of New Interventional Procedures - Surgical (ASERNIP-S), Royal Australasian College of Surgeons, Adelaide, South Australia, Australia
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Hinsley H, Nicholls A, Daines M, Wallace G, Arden N, Carr A. Classification of rotator cuff tendinopathy using high definition ultrasound. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.03.2014.20] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- H. Hinsley
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, Botnar Research Centre, University of Oxford, UK
| | - A. Nicholls
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, Botnar Research Centre, University of Oxford, UK
| | - M. Daines
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, Botnar Research Centre, University of Oxford, UK
| | - G. Wallace
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, Botnar Research Centre, University of Oxford, UK
| | - N. Arden
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, Botnar Research Centre, University of Oxford, UK
| | - A. Carr
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Biomedical Research Unit, Botnar Research Centre, University of Oxford, UK
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38
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Dillon G, Keegan J, Wallace G, Jacques K, Yiannikouris A, Moran C. PSXIII-16 The validation and verification of an LC/MS method for the determination of total docosahexaenoic acid concentrations in canine blood serum. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- G Dillon
- Alltech Ireland,Dunboyne, Ireland
| | - J Keegan
- Alltech Ireland,Dunboyne, Ireland
| | - G Wallace
- LGC,Teddington, Middlesex, United Kingdom
| | - K Jacques
- Alltech Inc,Nicholasville, KY, United States
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39
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Xu C, Zhang Molino B, Wang X, Cheng F, Xu W, Molino P, Bacher M, Su D, Rosenau T, Willför S, Wallace G. 3D printing of nanocellulose hydrogel scaffolds with tunable mechanical strength towards wound healing application. J Mater Chem B 2018; 6:7066-7075. [PMID: 32254590 DOI: 10.1039/c8tb01757c] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present for the first time approaches to 3D-printing of nanocellulose hydrogel scaffolds based on double crosslinking, first by in situ Ca2+ crosslinking and post-printing by chemical crosslinking with 1,4-butanediol diglycidyl ether (BDDE). Scaffolds were successfully printed from 1% nanocellulose hydrogels, with their mechanical strength being tunable in the range of 3 to 8 kPa. Cell tests suggest that the 3D-printed and BDDE-crosslinked nanocellulose hydrogel scaffolds supported fibroblast cells' proliferation, which was improving with increasing rigidity. These 3D-printed scaffolds render nanocellulose a new member of the family of promising support structures for crucial cellular processes during wound healing, regeneration and tissue repair.
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Affiliation(s)
- Chunlin Xu
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Turku, Finland.
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40
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McCleery A, Devenny K, Ogilby C, Dunn C, Steen A, Whyte E, Darling R, VanderHoek R, MacIntyre A, Carpenter S, Wallace G, Calder L. Using medicolegal data to support safe medical care: A contributing factor coding framework. J Healthc Risk Manag 2018; 38:11-18. [PMID: 30074677 DOI: 10.1002/jhrm.21348] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Traditional medicolegal data analysis focuses on physician care, without a full acknowledgment of the effects of team, organizational, and system factors. We developed a patient safety-informed contributing factor framework to strengthen the coding and analysis of medicolegal data. MATERIALS AND METHODS We incorporated patient safety theory and human factors science into our medicolegal case coding practices to improve our understanding of the many factors that contribute to medicolegal events. RESULTS AND DISCUSSION A new framework was developed that has at its core, patients and their experience, and looks beyond the provider factors that are often the focus of medicolegal analysis to give greater consideration to the influence of team, organizational, and system factors. We anticipate that this substantial shift will strengthen our knowledge translation efforts to help improve the safety of medical care. CONCLUSION We believe that reframing medicolegal case coding systems to better identify the influence of team, organizational, and system factors will increase the utility of this analysis in patient safety research, and health care quality improvement.
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Affiliation(s)
| | | | | | - Cynthia Dunn
- Canadian Medical Protective Association, Ottowa, Canada
| | - Anne Steen
- Canadian Medical Protective Association, Ottowa, Canada
| | - Eileen Whyte
- Canadian Medical Protective Association, Ottowa, Canada
| | - Renee Darling
- Canadian Medical Protective Association, Ottowa, Canada
| | | | | | | | | | - Lisa Calder
- Canadian Medical Protective Association, Ottowa, Canada
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Hayes S, Rheinberger N, Powley M, Rawnsley T, Brown L, Brown M, Butler K, Clarke A, Crichton S, Henderson M, McCosker H, Musgrave A, Wilcock J, Williams D, Yeaman K, Zaracostas TS, Taylor AC, Wallace G. Variation and Likeness in Ambient Artistic Portraiture. Perception 2018; 47:585-607. [PMID: 29701505 DOI: 10.1177/0301006618770347] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An artist-led exploration of portrait accuracy and likeness involved 12 Artists producing 12 portraits referencing a life-size 3D print of the same Sitter. The works were assessed during a public exhibition, and the resulting likeness assessments were compared to portrait accuracy as measured using geometric morphometrics (statistical shape analysis). Our results are that, independently of the assessors' prior familiarity with the Sitter's face, the likeness judgements tended to be higher for less morphologically accurate portraits. The two highest rated were the portrait that most exaggerated the Sitter's distinctive features, and a portrait that was a more accurate (but not the most accurate) depiction. In keeping with research showing photograph likeness assessments involve recognition, we found familiar assessors rated the two highest ranked portraits even higher than those with some or no familiarity. In contrast, those lacking prior familiarity with the Sitter's face showed greater favour for the portrait with the highest morphological accuracy, and therefore most likely engaged in face-matching with the exhibited 3D print. Furthermore, our research indicates that abstraction in portraiture may not enhance likeness, and we found that when our 12 highly diverse portraits were statistically averaged, this resulted in a portrait that is more morphologically accurate than any of the individual artworks comprising the average.
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Affiliation(s)
- Susan Hayes
- Centre for Archaeological Science, University of Wollongong Australia; Red Point Artists Association, Port Kembla, Australia
| | - Nick Rheinberger
- Australian Broadcasting Commission, ABC Radio Illawarra, Australia
| | - Meagan Powley
- Red Point Artists Association, Port Kembla, Australia
| | | | - Linda Brown
- Red Point Artists Association, Port Kembla, Australia
| | - Malcolm Brown
- Red Point Artists Association, Port Kembla, Australia
| | - Karen Butler
- Red Point Artists Association, Port Kembla, Australia
| | - Ann Clarke
- Red Point Artists Association, Port Kembla, Australia
| | | | | | | | - Ann Musgrave
- Red Point Artists Association, Port Kembla, Australia
| | - Joyce Wilcock
- Red Point Artists Association, Port Kembla, Australia
| | | | - Karin Yeaman
- Red Point Artists Association, Port Kembla, Australia
| | | | - Adam C Taylor
- ARC Centre of Excellence for Electromaterials Science, 90119 University of Wollongong Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, 90119 University of Wollongong Australia
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42
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McCaul M, Porter A, Barrett R, White P, Stroiescu F, Wallace G, Diamond D. Wearable Platform for Real-time Monitoring of Sodium in Sweat. Chemphyschem 2018; 19:1531-1536. [PMID: 29573322 DOI: 10.1002/cphc.201701312] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [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: 12/06/2017] [Indexed: 11/08/2022]
Abstract
A fully integrated and wearable platform for harvesting and analysing sweat sodium concentration in real time during exercise has been developed and tested. The platform was largely produced using 3D printing, which greatly simplifies fabrication and operation compared to previous versions generated with traditional production techniques. The 3D printed platform doubles the capacity of the sample storage reservoir to about 1.3 ml, reduces the assembly time and provides simple and precise component alignment and contact of the integrated solid-state ion-selective and reference electrodes with the sorbent material. The sampling flowrate in the device can be controlled by introducing threads to enhance wicking of sweat from the skin, across the electrodes to the storage area. The platform was characterised in the lab and in exercise trials over a period of about 60 minutes continuous monitoring. Sweat sodium concentration was found to rise initially to approximately 17 mM and decline gradually over the period of the trial to about 11-12 mM.
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Affiliation(s)
- Margaret McCaul
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Adam Porter
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Ruairi Barrett
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Paddy White
- Shimmer, DCU Alpha, Old Finglas Rd, Glasnevin, Dublin 11, Ireland D11 KXN4
| | - Florien Stroiescu
- Shimmer, DCU Alpha, Old Finglas Rd, Glasnevin, Dublin 11, Ireland D11 KXN4
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong NSW, 2522, Australia
| | - Dermot Diamond
- Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland
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Bourke J, Quigley A, O'Connell C, Crook J, Wallace G, Cook M, Kapsa R. Three dimensional microenvironments on multi-electrode arrays produce neuronal networks that function like the brain. Front Cell Neurosci 2018. [DOI: 10.3389/conf.fncel.2018.38.00018] [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: 11/13/2022] Open
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44
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Richard E, Peng C, Mehta E, Yao C, Knodt A, Hariri A, Wallace G. B-23Gender Modulates the Association Between Autistic Traits and Cortical Structure. Arch Clin Neuropsychol 2017. [DOI: 10.1093/arclin/acx076.108] [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: 11/13/2022] Open
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45
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Meneghini O, Shiraiwa S, Faust I, Parker RR, Schmidt A, Wallace G. Fullwave Simulations of Lower Hybrid Waves Coupled to 3D Fokker-Planck Solver: Comparison with Alcator C-Mod Experiment. Fusion Science and Technology 2017. [DOI: 10.13182/fst11-a12403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- O. Meneghini
- MIT Plasma Science and Fusion Center, Cambridge MA, USA
| | - S. Shiraiwa
- MIT Plasma Science and Fusion Center, Cambridge MA, USA
| | - I. Faust
- MIT Plasma Science and Fusion Center, Cambridge MA, USA
| | - R. R. Parker
- MIT Plasma Science and Fusion Center, Cambridge MA, USA
| | - A. Schmidt
- MIT Plasma Science and Fusion Center, Cambridge MA, USA
| | - G. Wallace
- MIT Plasma Science and Fusion Center, Cambridge MA, USA
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46
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LaBombard B, Kuang A, Brunner D, Faust I, Mumgaard R, Reinke M, Terry J, Hughes J, Walk J, Chilenski M, Lin Y, Marmar E, Wallace G, Whyte D, Wolfe S, Wukitch S. High-field side scrape-off layer investigation: Plasma profiles and impurity screening behavior in near-double-null configurations. Nuclear Materials and Energy 2017. [DOI: 10.1016/j.nme.2016.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Duchi S, Onofrillo C, O'Connell CD, Blanchard R, Augustine C, Quigley AF, Kapsa RMI, Pivonka P, Wallace G, Di Bella C, Choong PFM. Handheld Co-Axial Bioprinting: Application to in situ surgical cartilage repair. Sci Rep 2017; 7:5837. [PMID: 28724980 PMCID: PMC5517463 DOI: 10.1038/s41598-017-05699-x] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 06/14/2017] [Indexed: 02/07/2023] Open
Abstract
Three-dimensional (3D) bioprinting is driving major innovations in the area of cartilage tissue engineering. Extrusion-based 3D bioprinting necessitates a phase change from a liquid bioink to a semi-solid crosslinked network achieved by a photo-initiated free radical polymerization reaction that is known to be cytotoxic. Therefore, the choice of the photocuring conditions has to be carefully addressed to generate a structure stiff enough to withstand the forces phisiologically applied on articular cartilage, while ensuring adequate cell survival for functional chondral repair. We recently developed a handheld 3D printer called "Biopen". To progress towards translating this freeform biofabrication tool into clinical practice, we aimed to define the ideal bioprinting conditions that would deliver a scaffold with high cell viability and structural stiffness relevant for chondral repair. To fulfill those criteria, free radical cytotoxicity was confined by a co-axial Core/Shell separation. This system allowed the generation of Core/Shell GelMa/HAMa bioscaffolds with stiffness of 200KPa, achieved after only 10 seconds of exposure to 700 mW/cm2 of 365 nm UV-A, containing >90% viable stem cells that retained proliferative capacity. Overall, the Core/Shell handheld 3D bioprinting strategy enabled rapid generation of high modulus bioscaffolds with high cell viability, with potential for in situ surgical cartilage engineering.
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Affiliation(s)
- Serena Duchi
- University of Melbourne, Department of Surgery, St Vincent's Hospital Melbourne, 29 Regent Street-Clinical Science Building, 3065, Fitzroy, VIC, Australia.,ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia
| | - Carmine Onofrillo
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia
| | - Cathal D O'Connell
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia
| | - Romane Blanchard
- University of Melbourne, Department of Surgery, St Vincent's Hospital Melbourne, 29 Regent Street-Clinical Science Building, 3065, Fitzroy, VIC, Australia
| | - Cheryl Augustine
- University of Melbourne, Department of Surgery, St Vincent's Hospital Melbourne, 29 Regent Street-Clinical Science Building, 3065, Fitzroy, VIC, Australia
| | - Anita F Quigley
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia.,Department of Clinical Neurosciences, 5th Floor Daly Wing, St. Vincent's Hospital, 3065, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital Melbourne, 3065, Fitzroy, VIC, Australia
| | - Robert M I Kapsa
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia.,Department of Clinical Neurosciences, 5th Floor Daly Wing, St. Vincent's Hospital, 3065, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital Melbourne, 3065, Fitzroy, VIC, Australia
| | - Peter Pivonka
- University of Melbourne, Department of Surgery, St Vincent's Hospital Melbourne, 29 Regent Street-Clinical Science Building, 3065, Fitzroy, VIC, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia
| | - Claudia Di Bella
- University of Melbourne, Department of Surgery, St Vincent's Hospital Melbourne, 29 Regent Street-Clinical Science Building, 3065, Fitzroy, VIC, Australia. .,ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia. .,Department of Orthopaedics, St Vincent's Hospital Melbourne, 3065, Fitzroy, VIC, Australia.
| | - Peter F M Choong
- University of Melbourne, Department of Surgery, St Vincent's Hospital Melbourne, 29 Regent Street-Clinical Science Building, 3065, Fitzroy, VIC, Australia.,ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Northfields Ave, 2522, Wollongong, NSW, Australia.,Department of Orthopaedics, St Vincent's Hospital Melbourne, 3065, Fitzroy, VIC, Australia
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48
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Bonoli PT, Parker R, Wukitch SJ, Lin Y, Porkolab M, Wright JC, Edlund E, Graves T, Lin L, Liptac J, Parisot A, Schmidt AE, Tang V, Beck W, Childs R, Grimes M, Gwinn D, Johnson D, Irby J, Kanojia A, Koert P, Marazita S, Marmar E, Terry D, Vieira R, Wallace G, Zaks J, Bernabei S, Brunkhorse C, Ellis R, Fredd E, Greenough N, Hosea J, Kung CC, Loesser GD, Rushinski J, Schilling G, Phillips CK, Wilson JR, Harvey RW, Fiore CL, Granetz R, Greenwald M, Hubbard AE, Hutchinson IH, Labombard B, Lipschultz B, Rice J, Snipes JA, Terry J, Wolfe SM. Wave-Particle Studies in the Ion Cyclotron and Lower Hybrid Ranges of Frequencies in Alcator C-Mod. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1430] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- P. T. Bonoli
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - R. Parker
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - S. J. Wukitch
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - Y. Lin
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - M. Porkolab
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. C. Wright
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - E. Edlund
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - T. Graves
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - L. Lin
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. Liptac
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - A. Parisot
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - A. E. Schmidt
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - V. Tang
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - W. Beck
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - R. Childs
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - M. Grimes
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - D. Gwinn
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - D. Johnson
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. Irby
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - A. Kanojia
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - P. Koert
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - S. Marazita
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - E. Marmar
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - D. Terry
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - R. Vieira
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - G. Wallace
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. Zaks
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - S. Bernabei
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - C. Brunkhorse
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - R. Ellis
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - E. Fredd
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - N. Greenough
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - J. Hosea
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - C. C. Kung
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - G. D. Loesser
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - J. Rushinski
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - G. Schilling
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - C. K. Phillips
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | - J. R. Wilson
- Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
| | | | - C. L. Fiore
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - R. Granetz
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - M. Greenwald
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - A. E. Hubbard
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - I. H. Hutchinson
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - B. Labombard
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - B. Lipschultz
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. Rice
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. A. Snipes
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - J. Terry
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
| | - S. M. Wolfe
- Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, Massachusetts 02139
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49
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Park S, Bae YS, Kim JH, Do H, Kim HT, Kim KM, Kim HK, Kim HJ, Han WS, Yang HL, Kwak JG, Namkung W, Cho MH, Park H, Delpech L, Hillairet J, Magne R, Hoang GT, Litaudon X, Wallace G, Shiraiwa S, Vieira R, Doody J. Progress of KSTAR 5-GHz Lower Hybrid Current Drive System. Fusion Science and Technology 2017. [DOI: 10.13182/fst12-493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Park
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - Y. S. Bae
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - J. H. Kim
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - H. Do
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - H. T. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - K. M. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - H. K. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - H. J. Kim
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - W. S. Han
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - H. L. Yang
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - J. G. Kwak
- National Fusion Research Institute, Gwahangno 113, Yuseong-gu, Daejeon 305-333, Korea
| | - W. Namkung
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - M. H. Cho
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - H. Park
- Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Korea
| | - L. Delpech
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - J. Hillairet
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - R. Magne
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - G. T. Hoang
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - X. Litaudon
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - G. Wallace
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| | - S. Shiraiwa
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| | - R. Vieira
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
| | - J. Doody
- Massachusetts Institute of Technology, Plasma Science and Fusion Center Cambridge, Massachusetts 02139, United States
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50
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Zhang L, Kim T, Li N, Kang TJ, Chen J, Pringle JM, Zhang M, Kazim AH, Fang S, Haines C, Al-Masri D, Cola BA, Razal JM, Di J, Beirne S, MacFarlane DR, Gonzalez-Martin A, Mathew S, Kim YH, Wallace G, Baughman RH. High Power Density Electrochemical Thermocells for Inexpensively Harvesting Low-Grade Thermal Energy. Adv Mater 2017; 29:1605652. [PMID: 28121372 DOI: 10.1002/adma.201605652] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/03/2016] [Indexed: 06/06/2023]
Abstract
Continuously operating thermo-electrochemical cells (thermocells) are of interest for harvesting low-grade waste thermal energy because of their potentially low cost compared with conventional thermoelectrics. Pt-free thermocells devised here provide an output power of 12 W m-2 for an interelectrode temperature difference (ΔT) of 81 °C, which is sixfold higher power than previously reported for planar thermocells operating at ambient pressure.
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Affiliation(s)
- Long Zhang
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA
- Sichuan New Material Research Center, Mianyang, Sichuan, 621000, China
| | - Taewoo Kim
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, South Korea
| | - Na Li
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA
| | - Tae June Kang
- Department of Mechanical Engineering, INHA University, Incheon, 22212, South Korea
| | - Jun Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, Innovation Campus, New South Wales, 2500, Australia
| | - Jennifer M Pringle
- ARC Centre of Excellence for Electromaterials Science, Deakin University, Geelong, Victoria, 3220, Australia
| | - Mei Zhang
- FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, 32310, USA
| | - Ali H Kazim
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shaoli Fang
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA
| | - Carter Haines
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA
| | - Danah Al-Masri
- ARC Centre of Excellence for Electromaterials Science, Deakin University, Geelong, Victoria, 3220, Australia
| | - Baratunde A Cola
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Joselito M Razal
- Institute for Frontier Materials, Deakin University, Geelong, Victoria, 3220, Australia
| | - Jiangtao Di
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA
| | - Stephen Beirne
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, Innovation Campus, New South Wales, 2500, Australia
| | - Douglas R MacFarlane
- School of Chemistry and ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria, 3800, Australia
| | | | - Sibi Mathew
- Lynntech, Inc, 2501 Earl Rudder Freeway South, College Station, TX, 77845, USA
| | - Yong Hyup Kim
- School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, South Korea
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, Innovation Campus, New South Wales, 2500, Australia
| | - Ray H Baughman
- The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA
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