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Amin ML, Mawad D, Dokos S, Sorrell CC. Comparative Bioactivities of Chemically Modified Fucoidan and λ-Carrageenan toward Cells Encapsulated in Covalently Cross-Linked Hydrogels. Biomacromolecules 2024. [PMID: 38554085 DOI: 10.1021/acs.biomac.4c00228] [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: 04/01/2024]
Abstract
The sulfated marine polysaccharides, fucoidan and λ-carrageenan, are known to possess anti-inflammatory, immunomodulatory, and cellular protective properties. Although they hold considerable promise for tissue engineering constructs, their covalent cross-linking in hydrogels and comparative bioactivities to cells are absent from the literature. Thus, fucoidan and λ-carrageenan were modified with methacrylate groups and were covalently cross-linked with the synthetic polymer poly(vinyl alcohol)-methacrylate (PVA-MA) to form 20 wt % biosynthetic hydrogels. Identical degrees of methacrylation were confirmed by 1H NMR, and covalent conjugation was determined by using a colorimetric 1,9-dimethyl-methylene blue (DMMB) assay. Pancreatic beta cells were encapsulated in the hydrogels, followed by culturing in the 3D environment for a prolonged period of 32 days and evaluation of the cellular functionality by live/dead, adenosine 5'-triphosphate (ATP) level, and insulin secretion. The results confirmed that fucoidan and λ-carrageenan exhibited ∼12% methacrylate substitution, which generated hydrogels with stable conjugation of the polysaccharides with PVA-MA. The cells encapsulated in the PVA-fucoidan hydrogels demonstrated consistently high ATP levels over the culture period. Furthermore, only cells in the PVA-fucoidan hydrogels retained glucose responsiveness, demonstrating comparatively higher insulin secretion in response to glucose. In contrast, cells in the PVA-λ-carrageenan and the PVA control hydrogels lost all glucose responsiveness. The present work confirms the superior effects of chemically modified fucoidan over λ-carrageenan on pancreatic beta cell survival and function in covalently cross-linked hydrogels, thereby illustrating the importance of differential polysaccharide structural features on their biological effects.
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Affiliation(s)
- Md Lutful Amin
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
- Australian Centre for NanoMedicine, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Socrates Dokos
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Charles C Sorrell
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
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Zeglio E, Wang Y, Jain S, Lin Y, Avila Ramirez AE, Feng K, Guo X, Ose H, Mozolevskis G, Mawad D, Yue W, Hamedi MM, Herland A. Mixing Insulating Commodity Polymers with Semiconducting n-type Polymers Enables High-Performance Electrochemical Transistors. Adv Mater 2024:e2302624. [PMID: 38431796 DOI: 10.1002/adma.202302624] [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: 03/21/2023] [Revised: 02/08/2024] [Indexed: 03/05/2024]
Abstract
Diluting organic semiconductors with a host insulating polymer is used to increase the electronic mobility in organic electronic devices, such as thin film transistors, while considerably reducing material costs. In contrast to organic electronics, bioelectronic devices such as the organic electrochemical transistor (OECT) rely on both electronic and ionic mobility for efficient operation, making it challenging to integrate hydrophobic polymers as the predominant blend component. This work shows that diluting the n-type conjugated polymer p(N-T) with high molecular weight polystyrene (10 KDa) leads to OECTs with over three times better mobility-volumetric capacitance product (µC*) with respect to the pristine p(N-T) (from 4.3 to 13.4 F V-1 cm-1 s-1 ) while drastically decreasing the amount of conjugated polymer (six times less). This improvement in µC* is due to a dramatic increase in electronic mobility by two orders of magnitude, from 0.059 to 1.3 cm2 V-1 s-1 for p(N-T):Polystyrene 10 KDa 1:6. Moreover, devices made with this polymer blend show better stability, retaining 77% of the initial drain current after 60 minutes operation in contrast to 12% for pristine p(N-T). These results open a new generation of low-cost organic mixed ionic-electronic conductors where the bulk of the film is made by a commodity polymer.
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Affiliation(s)
- Erica Zeglio
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences, Department of Neuroscience, Karolinska Institute, Solna, 171 77, Sweden
- Division of Nanobiotechnology, Department of Protein Science, Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, 171 65, Sweden
- Wallenberg Initiative Materials Science for Sustainability, Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 114 18, Sweden
- Digital Futures, Stockholm, SE-100 44, Sweden
| | - Yazhou Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Saumey Jain
- Division of Nanobiotechnology, Department of Protein Science, Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, 171 65, Sweden
- Division of Micro and Nanosystems, Department of Intelligent Systems, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm, 100 44, Sweden
| | - Yunfan Lin
- Division of Nanobiotechnology, Department of Protein Science, Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, 171 65, Sweden
| | - Alan Eduardo Avila Ramirez
- Division of Nanobiotechnology, Department of Protein Science, Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, 171 65, Sweden
| | - Kui Feng
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
| | - Xugang Guo
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China
| | - Helena Ose
- Micro and nanodevices laboratory, Institute of Solid-State Physics, University of Latvia, 8 Kengaraga Str., Riga, LV-1063, Latvia
| | - Gatis Mozolevskis
- Micro and nanodevices laboratory, Institute of Solid-State Physics, University of Latvia, 8 Kengaraga Str., Riga, LV-1063, Latvia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Wan Yue
- Wallenberg Initiative Materials Science for Sustainability, Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 114 18, Sweden
| | - Mahiar Max Hamedi
- Digital Futures, Stockholm, SE-100 44, Sweden
- Department of Fiber and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 100 44, Sweden
| | - Anna Herland
- AIMES-Center for the Advancement of Integrated Medical and Engineering Sciences, Department of Neuroscience, Karolinska Institute, Solna, 171 77, Sweden
- Division of Nanobiotechnology, Department of Protein Science, Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, 171 65, Sweden
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Uddin MMN, Bekmukhametova A, Antony A, Barman SK, Houang J, Wu MJ, Hook JM, George L, Wuhrer R, Mawad D, Ta D, Ruprai H, Lauto A. Encapsulated Rose Bengal Enhances the Photodynamic Treatment of Triple-Negative Breast Cancer Cells. Molecules 2024; 29:546. [PMID: 38276623 PMCID: PMC10820979 DOI: 10.3390/molecules29020546] [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: 12/04/2023] [Revised: 01/13/2024] [Accepted: 01/15/2024] [Indexed: 01/27/2024] Open
Abstract
Among breast cancer subtypes, triple-negative breast cancer stands out as the most aggressive, with patients facing a 40% mortality rate within the initial five years. The limited treatment options and unfavourable prognosis for triple-negative patients necessitate the development of novel therapeutic strategies. Photodynamic therapy (PDT) is an alternative treatment that can effectively target triple-negative neoplastic cells such as MDA-MB-231. In this in vitro study, we conducted a comparative analysis of the PDT killing rate of unbound Rose Bengal (RB) in solution versus RB-encapsulated chitosan nanoparticles to determine the most effective approach for inducing cytotoxicity at low laser powers (90 mW, 50 mW, 25 mW and 10 mW) and RB concentrations (50 µg/mL, 25 µg/mL, 10 µg/mL and 5 µg/mL). Intracellular singlet oxygen production and cell uptake were also determined for both treatment modalities. Dark toxicity was also assessed for normal breast cells. Despite the low laser power and concentration of nanoparticles (10 mW and 5 µg/mL), MDA-MB-231 cells experienced a substantial reduction in viability (8 ± 1%) compared to those treated with RB solution (38 ± 10%). RB nanoparticles demonstrated higher singlet oxygen production and greater uptake by cancer cells than RB solutions. Moreover, RB nanoparticles display strong cytocompatibility with normal breast cells (MCF-10A). The low activation threshold may be a crucial advantage for specifically targeting malignant cells in deep tissues.
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Affiliation(s)
- Mir Muhammad Nasir Uddin
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
- Department of Pharmacy, Faculty of Biological Sciences, University of Chittagong, Chittagong 4331, Bangladesh
| | | | - Anu Antony
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Shital K. Barman
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Jessica Houang
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Ming J. Wu
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - James M. Hook
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia;
| | - Laurel George
- Advanced Materials Characterisation Facility, Western Sydney University, Penrith, NSW 2750, Australia
| | - Richard Wuhrer
- Advanced Materials Characterisation Facility, Western Sydney University, Penrith, NSW 2750, Australia
| | - Damia Mawad
- School of Materials Science and Engineering and Australian Centre for NanoMedicine, University of New South Wales, Kensington, NSW 2052, Australia
| | - Daniel Ta
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Herleen Ruprai
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
- Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Penrith, NSW 2750, Australia
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Bekmukhametova A, Antony A, Halliday C, Chen S, Ho CH, Uddin MMN, Longo L, Pedrinazzi C, George L, Wuhrer R, Myers S, Mawad D, Houang J, Lauto A. Rose bengal-encapsulated chitosan nanoparticles for the photodynamic treatment of Trichophyton species. Photochem Photobiol 2024; 100:115-128. [PMID: 37477110 DOI: 10.1111/php.13839] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/29/2023] [Accepted: 07/04/2023] [Indexed: 07/22/2023]
Abstract
Rose bengal (RB) solutions coupled with a green laser have proven to be efficient in clearing resilient nail infections caused by Trichophyton rubrum in a human pilot study and in extensive in vitro experiments. Nonetheless, the RB solution can become diluted or dispersed over the tissue and prevented from penetrating the nail plate to reach the subungual area where fungal infection proliferates. Nanoparticles carrying RB can mitigate the problem of dilution and are reported to effectively penetrate through the nail. For this reason, we have synthesized RB-encapsulated chitosan nanoparticles with a peak distribution size of ~200 nm and high reactive oxygen species (ROS) production. The RB-encapsulated chitosan nanoparticles aPDT were shown to kill more than 99% of T. rubrum, T. mentagrophytes, and T. interdigitale spores, which are the common clinically relevant pathogens in onychomycosis. These nanoparticles are not cytotoxic against human fibroblasts, which promotes their safe application in clinical translation.
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Affiliation(s)
- Alina Bekmukhametova
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Anu Antony
- School of Medicine, Western Sydney University, Penrith, New South Wales, Australia
| | - Catriona Halliday
- Centre for Infectious Diseases and Microbiology Laboratory Services, ICPMR, Westmead Hospital, Westmead, New South Wales, Australia
| | - Sharon Chen
- Centre for Infectious Diseases and Microbiology Laboratory Services, ICPMR, Westmead Hospital, Westmead, New South Wales, Australia
- Sydney Medical School, University of Sydney, Westmead, New South Wales, Australia
| | - Chun-Hoong Ho
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Mir Muhammad Nasir Uddin
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong, Bangladesh
| | | | | | - Laurel George
- Advanced Materials Characterisation Facility (AMCF), Western Sydney University, Penrith, New South Wales, Australia
| | - Richard Wuhrer
- Advanced Materials Characterisation Facility (AMCF), Western Sydney University, Penrith, New South Wales, Australia
| | - Simon Myers
- School of Medicine, Western Sydney University, Penrith, New South Wales, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, University of New South Wales, Kensington, New South Wales, Australia
- Australian Centre for NanoMedicine, UNSW Australia, Sydney, New South Wales, Australia
| | - Jessica Houang
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
- Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Penrith, New South Wales, Australia
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Fidanovski K, Gu M, Travaglini L, Lauto A, Mawad D. Self-Doping and Self-Acid-Doping of Conjugated Polymer Bioelectronics: The Case for Accuracy in Nomenclature. Adv Healthc Mater 2023:e2302354. [PMID: 37883783 DOI: 10.1002/adhm.202302354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/16/2023] [Indexed: 10/28/2023]
Abstract
Conjugated polymers are enabling the development of flexible bioelectronics, largely driven by their organic nature which facilitates modification and tuning to suit a variety of applications. As organic semiconductors, conjugated polymers require a dopant to exhibit electrical conductivity, which in physiological conditions can result in dopant loss and thereby deterioration in electronic properties. To overcome this challenge, "self-doped" and self-acid-doped conjugated polymers having ionized pendant groups covalently bound to their backbone are being developed. The ionized group in a "self-doped" polymer behaves as the counterion that maintains electroneutrality, while an external dopant is required to induce charge transfer. The ionized group in a self-acid-doped polymer induces charge transfer and behaves as the counterion balancing the charges. Despite their doping processes being different, the two terms, self-doped and self-acid-doped, are often used interchangeably in the literature. Here, the differences are highlighted in the doping mechanisms of self-doped and self-acid-doped polymers, and it is proposed that the term "self-doped" should be replaced by "self-compensated," while reserving the term self-acid-doped for polymers that are intrinsically doped without the need of an external dopant. This is followed by a summary of examples of self-acid-doping in bioelectronics, highlighting their stability in the conductive state under physiological conditions.
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Affiliation(s)
- Kristina Fidanovski
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Modi Gu
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Lorenzo Travaglini
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, New South Wales, 2751, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Australian Centre for NanoMedicine, UNSW Sydney, Sydney, New South Wales, 2052, Australia
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Uddin MMN, Bekmukhametova A, Antony A, Barman SK, Houang J, Wu MJ, Hook J, George L, Wuhrer R, Mawad D, Ta D, Lauto A. Photodynamic Treatment of Human Breast and Prostate Cancer Cells Using Rose Bengal-Encapsulated Nanoparticles. Molecules 2023; 28:6901. [PMID: 37836744 PMCID: PMC10574360 DOI: 10.3390/molecules28196901] [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: 09/05/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
Cancer, a prominent cause of death, presents treatment challenges, including high dosage requirements, drug resistance, poor tumour penetration and systemic toxicity in traditional chemotherapy. Photodynamic therapy, using photosensitizers like rose bengal (RB) with a green laser, shows promise against breast cancer cells in vitro. However, the hydrophilic RB struggles to efficiently penetrate the tumour site due to the unique clinical microenvironment, aggregating around rather than entering cancer cells. In this study, we have synthesized and characterized RB-encapsulated chitosan nanoparticles with a peak particle size of ~200 nm. These nanoparticles are readily internalized by cells and, in combination with a green laser (λ = 532 nm) killed 94-98% of cultured human breast cancer cells (MCF-7) and prostate cancer cells (PC3) at a low dosage (25 μg/mL RB-nanoparticles, fluence ~126 J/cm2, and irradiance ~0.21 W/cm2). Furthermore, these nanoparticles are not toxic to cultured human normal breast cells (MCF10A), which opens an avenue for translational applications.
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Affiliation(s)
- Mir Muhammad Nasir Uddin
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
- Department of Pharmacy, Faculty of Biological Sciences, University of Chittagong, Chittagong 4331, Bangladesh
| | | | - Anu Antony
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Shital K. Barman
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Jessica Houang
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Ming J. Wu
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - James Hook
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Laurel George
- Advanced Materials Characterisation Facility, Western Sydney University, Penrith, NSW 2750, Australia
| | - Richard Wuhrer
- Advanced Materials Characterisation Facility, Western Sydney University, Penrith, NSW 2750, Australia
| | - Damia Mawad
- School of Materials Science and Engineering and Australian Centre for NanoMedicine, University of New South Wales, Kensington, NSW 2052, Australia
| | - Daniel Ta
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia
- Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Penrith, NSW 2750, Australia
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Almasri RM, Ladouceur F, Mawad D, Esrafilzadeh D, Firth J, Lehmann T, Poole-Warren LA, Lovell NH, Al Abed A. Emerging trends in the development of flexible optrode arrays for electrophysiology. APL Bioeng 2023; 7:031503. [PMID: 37692375 PMCID: PMC10491464 DOI: 10.1063/5.0153753] [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] [Received: 04/11/2023] [Accepted: 08/08/2023] [Indexed: 09/12/2023] Open
Abstract
Optical-electrode (optrode) arrays use light to modulate excitable biological tissues and/or transduce bioelectrical signals into the optical domain. Light offers several advantages over electrical wiring, including the ability to encode multiple data channels within a single beam. This approach is at the forefront of innovation aimed at increasing spatial resolution and channel count in multichannel electrophysiology systems. This review presents an overview of devices and material systems that utilize light for electrophysiology recording and stimulation. The work focuses on the current and emerging methods and their applications, and provides a detailed discussion of the design and fabrication of flexible arrayed devices. Optrode arrays feature components non-existent in conventional multi-electrode arrays, such as waveguides, optical circuitry, light-emitting diodes, and optoelectronic and light-sensitive functional materials, packaged in planar, penetrating, or endoscopic forms. Often these are combined with dielectric and conductive structures and, less frequently, with multi-functional sensors. While creating flexible optrode arrays is feasible and necessary to minimize tissue-device mechanical mismatch, key factors must be considered for regulatory approval and clinical use. These include the biocompatibility of optical and photonic components. Additionally, material selection should match the operating wavelength of the specific electrophysiology application, minimizing light scattering and optical losses under physiologically induced stresses and strains. Flexible and soft variants of traditionally rigid photonic circuitry for passive optical multiplexing should be developed to advance the field. We evaluate fabrication techniques against these requirements. We foresee a future whereby established telecommunications techniques are engineered into flexible optrode arrays to enable unprecedented large-scale high-resolution electrophysiology systems.
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Affiliation(s)
- Reem M. Almasri
- Graduate School of Biomedical Engineering, UNSW, Sydney, NSW 2052, Australia
| | | | - Damia Mawad
- School of Materials Science and Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Josiah Firth
- Australian National Fabrication Facility, UNSW, Sydney, NSW 2052, Australia
| | - Torsten Lehmann
- School of Electrical Engineering and Telecommunications, UNSW, Sydney, NSW 2052, Australia
| | | | | | - Amr Al Abed
- Graduate School of Biomedical Engineering, UNSW, Sydney, NSW 2052, Australia
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Almasri RM, Abed AA, Esrafilzadeh D, Mawad D, Poole-Warren LA, Lovell NH. Electromechanical Stability and Transmission Behavior of Transparent Conductive Films for Biomedical Optoelectronic Devices. Annu Int Conf IEEE Eng Med Biol Soc 2022; 2022:5-8. [PMID: 36086039 DOI: 10.1109/embc48229.2022.9870827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The application of transparent conductive films to flexible biomedical optoelectronics is limited by stringent requirements on the candidate materials' electromechanical and optical properties as well as their biological performance. Thin films of graphene and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) are sought as mechanically flexible alternatives to traditional indium tin oxide (ITO). However, they require more understanding of their suitability for biomedical optoelectronic devices in terms of transmission behavior and electromechanical stability. This study shows that the relative increase in sheet resistance under cyclic loading for ITO, graphene, and PEDOT:PSS was 3546±3908%,12±2.7%, and 62±68%, respectively. Moreover, graphene and PEDOT:PSS showed a transmission uniformity of 9.3% and 36.3% (380-2000 nm), respectively, compared with ITO film (61%). Understanding the optical, electrical, and mechanical limits of the transparent conductive films facilitates the optimization of flexible optoelectronic designs to fit multiple biomedical research and clinical applications.
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Bekmukhametova A, Uddin MMN, Houang J, Malladi C, George L, Wuhrer R, Barman SK, Wu MJ, Mawad D, Lauto A. Fabrication and characterization of chitosan nanoparticles using the coffee-ring effect for photodynamic therapy. Lasers Surg Med 2022; 54:758-766. [PMID: 35195285 DOI: 10.1002/lsm.23530] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 01/30/2022] [Accepted: 02/07/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Biocompatible nanoparticles have been increasingly used in a variety of medical applications, including photodynamic therapy. Although the impact of synthesis parameters and purification methods is reported in previous studies, it is still challenging to produce a reliable protocol for the fabrication, purification, and characterization of nanoparticles in the 200-300 nm range that are highly monodisperse for biomedical applications. STUDY DESIGN/MATERIALS AND METHODS We investigated the synthesis of chitosan nanoparticles in the 200-300 nm range by evaluating the chitosan to sodium tripolyphosphate (TPP) mass ratio and acetic acid concentration of the chitosan solution. Chitosan nanoparticles were also crosslinked to rose bengal and incubated with human breast cancer cells (MCF-7) to test photodynamic activity using a green laser (λ = 532 nm, power = 90 mW). RESULTS We established a simple protocol to fabricate and purify biocompatible nanoparticles with the most frequent size occurring between 200 and 300 nm. This was achieved using a chitosan to TPP mass ratio of 5:1 in 1% v/v acetic acid at a pH of 5.5. The protocol involved the formation of nanoparticle coffee rings that showed the particle shape to be spherical in the first approximation. Photodynamic treatment with rose bengal-nanoparticles killed ~98% of cancer cells. CONCLUSION A simple protocol was established to prepare and purify spherical and biocompatible chitosan nanoparticles with a peak size of ~200 nm. These have remarkable antitumor activity when coupled with photodynamic treatment.
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Affiliation(s)
- Alina Bekmukhametova
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Mir Muhammad Nasir Uddin
- School of Science, Western Sydney University, Penrith, New South Wales, Australia.,Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong, Bangladesh
| | - Jessica Houang
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Chandra Malladi
- Molecular Biology and Genetics, Proteomics and Lipidomics Lab, School of Medicine, Western Sydney University, Penrith, New South Wales, Australia
| | - Laurel George
- Advanced Materials Characterisation Facility, Western Sydney University, Penrith, New South Wales, Australia
| | - Richard Wuhrer
- Advanced Materials Characterisation Facility, Western Sydney University, Penrith, New South Wales, Australia
| | - Shital K Barman
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Ming J Wu
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Damia Mawad
- School of Materials Science and Engineering and Australian Centre for NanoMedicine, University of New South Wales, Kensington, New South Wales, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, New South Wales, Australia.,Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, University of New South Wales, Penrith, New South Wales, Australia
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Abstract
Radical polymerization is one of the most widely used methods for the synthesis of polymeric materials for biomedical applications, such as drug delivery, 3D cell culture, and regenerative medicine. Among radical polymerization reactions, thiol-ene click chemistry has shown excellent orthogonality in diverse reaction conditions. However, our preliminary investigations revealed that it fails in cell culture environment. Herein, we investigate the mechanisms by which cell culture media interfere with radical photoreactions. Three different models including free radical linear photopolymerization (N,N-dimethylacrylamide photopolymerization), free radical photohydrogelation (poly(ethylene glycol) diacrylate photohydrogelation), and thiol-ene photohydrogelation (4-arm poly(ethylene glycol)-norbornene thiol-ene photohydrogelation) were investigated. We showed that common cell culture media ingredients can interfere with radical polymerization by two different pathways; namely, radical chain transfer and radical scavenging effects. Thiol-ene photoclick hydrogelation was seriously affected by cell culture media especially under the alkaline conditions of many of them, due to the impact of deprotonation of the thiol reactant. We intend these findings to serve as a reference guide to researchers employing free radical-based molecular synthesis in cell culture settings. The nonbenign impact of media components, pH, and concentration should provide a cue for future studies that aim to prepare well-defined polymeric materials in the presence of cell culture media.
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Affiliation(s)
| | | | - Damia Mawad
- School of Materials Science and Engineering, UNSW, Sydney, NSW 2052, Australia
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11
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Monfared M, Mawad D, Rnjak-Kovacina J, Stenzel MH. 3D bioprinting of dual-crosslinked nanocellulose hydrogels for tissue engineering applications. J Mater Chem B 2021; 9:6163-6175. [PMID: 34286810 DOI: 10.1039/d1tb00624j] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Hydrogels based on cellulose nanofibrils (CNFs) have been widely used as scaffolds for biomedical applications, however, the poor mechanical properties of CNF hydrogels limit their use as ink for 3D bioprinting in order to generate scaffolds for tissue engineering applications. In this study, a dual crosslinkable hydrogel ink composed of a poly(ethylene glycol) (PEG) star polymer and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO)-oxidized nanocellulose fibers (CNFs) is presented. As the resulting hydrogel had low structural integrity, at first crosslinking of CNFs was introduced by Ca2+. Strong physical interactions between CNFs and Ca2+ cations allowed easy regulation of the viscosity of the inks for extrusion printing raising the solution viscosity by more than 1.5 times depending on the amount of Ca2+ added. The resulting hydrogel had high structural integrity and was further stabilized in a second step by photo crosslinking of PEG under visible light. In only a few seconds, hydrogels with Young's modulus between ∼10 and 30 kPa were obtained just by altering the CNF and Ca2+ content. 3D printed hydrogels supported fibroblasts with excellent cell viability and proliferation. The dual crosslinkable hydrogel ink herein developed is versatile, easy to prepare, and suitable for 3D printing of bioscaffolds with highly tailored viscoelastic and mechanical properties applicable in a wide range of regenerative medicines.
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12
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Amin ML, Mawad D, Dokos S, Koshy P, Martens PJ, Sorrell CC. Fucoidan- and carrageenan-based biosynthetic poly(vinyl alcohol) hydrogels for controlled permeation. Mater Sci Eng C Mater Biol Appl 2021; 121:111821. [PMID: 33579464 DOI: 10.1016/j.msec.2020.111821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 12/14/2020] [Accepted: 12/19/2020] [Indexed: 01/01/2023]
Abstract
Since the permeation of the inflammatory cytokines into hydrogel scaffolds has been shown to cause dysfunction of encapsulated cells, appropriate design strategies to circumvent this are essential. In the present work, it was hypothesized that highly crosslinked PVA-fucoidan and PVA-carrageenan hydrogels can control permeation of the trefoil-shaped inflammatory cytokine IL-1β while allowing the permeation of the globular protein albumin. PVA, fucoidan, and carrageenans were functionalized with methacrylate groups and the functionalized polymers were co-crosslinked by UV photopolymerization. The resultant hydrogels were characterized physicochemically and the release of fucoidan and carrageenans was quantified by developing a colorimetric assay, which was validated by XPS analysis. The permeability characteristics of the hydrogels were evaluated using bovine serum albumin (BSA), IgG, and IL-1β. The results demonstrated an increase in hydrogel swelling through the incorporation of the polysaccharides with minimal overall mass loss. The release studies showed hydrogel stability, where the formulations exhibited ~43% retention of fucoidan and ~60-80% retention of carrageenans consistently up to 7 days. The permeation data revealed very low permeation of IgG and IL-1β through the hydrogels, with <1% permeation after 24 h, while allowing >6% permeation of BSA. These data indicate that such hydrogels can be used as the basis for cytokine-protective implantable devices for clinical applications.
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Affiliation(s)
- Md Lutful Amin
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia; Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia.
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia; Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, NSW 2052, Australia; Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Socrates Dokos
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Pramod Koshy
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Penny Jo Martens
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Charles C Sorrell
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia.
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13
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Jephcott L, Eslami M, Travaglini L, Lauto A, Mawad D. Frontispiece: A conjugated polymer‐liposome complex: A contiguous water‐stable, electronic, and optical interface (View 1/2021). View 2021. [DOI: 10.1002/viw2.92] [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: 11/06/2022] Open
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14
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Baker C, Wagner K, Wagner P, Officer DL, Mawad D. Biofunctional conducting polymers: synthetic advances, challenges, and perspectives towards their use in implantable bioelectronic devices. Advances in Physics: X 2021. [DOI: 10.1080/23746149.2021.1899850] [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: 10/20/2022] Open
Affiliation(s)
- Carly Baker
- ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, AIIM Faculty, Innovation Campus, University of Wollongong, North Wollongong, Australia
| | - Klaudia Wagner
- ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, AIIM Faculty, Innovation Campus, University of Wollongong, North Wollongong, Australia
| | - Pawel Wagner
- ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, AIIM Faculty, Innovation Campus, University of Wollongong, North Wollongong, Australia
| | - David L. Officer
- ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, AIIM Faculty, Innovation Campus, University of Wollongong, North Wollongong, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Science, University of New South Wales, Sydney, Australia
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15
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Bekmukhametova A, Ruprai H, Hook JM, Mawad D, Houang J, Lauto A. Photodynamic therapy with nanoparticles to combat microbial infection and resistance. Nanoscale 2020; 12:21034-21059. [PMID: 33078823 DOI: 10.1039/d0nr04540c] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Infections caused by drug-resistant pathogens are rapidly increasing in incidence and pose an urgent global health concern. New treatments are needed to address this critical situation while preventing further resistance acquired by the pathogens. One promising approach is antimicrobial photodynamic therapy (PDT), a technique that selectively damages pathogenic cells through reactive oxygen species (ROS) that have been deliberately produced by light-activated chemical reactions via a photosensitiser. There are currently some limitations to its wider deployment, including aggregation, hydrophobicity, and sub-optimal penetration capabilities of the photosensitiser, all of which decrease the production of ROS and lead to reduced therapeutic performance. In combination with nanoparticles, however, these challenges may be overcome. Their small size, functionalisable structure, and large contact surface allow a high degree of internalization by cellular membranes and tissue barriers. In this review, we first summarise the mechanism of PDT action and the interaction between nanoparticles and the cell membrane. We then introduce the categorisation of nanoparticles in PDT, acting as nanocarriers, photosensitising molecules, and transducers, in which we highlight their use against a range of bacterial and fungal pathogens. We also compare the antimicrobial efficiency of nanoparticles to unbound photosensitisers and examine the relevant safety considerations. Finally, we discuss the use of nanoparticulate drug delivery systems in clinical applications of antimicrobial PDT.
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Affiliation(s)
| | - Herleen Ruprai
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia.
| | - James M Hook
- School of Chemistry, University of New South Wales, Kensington, NSW 2052, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, University of New South Wales, Kensington, NSW 2052, Australia and Centre for Advanced Macromolecular Design, Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent BioNano Science and Technology, UNSW Australia, Sydney, NSW 2052, Australia
| | - Jessica Houang
- Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW 2006, Australia and Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Penrith, NSW 2750, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, NSW 2750, Australia. and Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Penrith, NSW 2750, Australia
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16
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Eslami M, Zeglio E, Alosaimi G, Yan Y, Ruprai H, Macmillan A, Seidel J, Lauto A, Joukhdar H, Rnjak-Kovacina J, Mawad D. A One Step Procedure toward Conductive Suspensions of Liposome-Polyaniline Complexes. Macromol Biosci 2020; 20:e2000103. [PMID: 32537900 DOI: 10.1002/mabi.202000103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 03/31/2020] [Revised: 05/21/2020] [Indexed: 11/07/2022]
Abstract
Interaction of conjugated polymers with liposomes is an attractive approach that benefits from both systems' characteristics such as electroactivity and enhanced interaction with cells. Conjugated polymer-liposome complexes have been investigated for bioimaging, drug delivery, and photothermal therapy. Their fabrication has largely been achieved by multistep procedures that require first the synthesis and processing of the conjugated polymer. Here, a new one step fabrication approach is reported based on in situ polymerization of a conjugated monomer precursor around liposomes. Polyaniline (PANI) doped with phytic acid is synthesized via oxidative polymerization in the presence of 1,2-dioleoyl-sn-glycero-3-phosphatidylcholine (DOPC) vesicles to produce a conductive aqueous suspension of Liposome-PANI complexes. PANI interacts with liposomes without disrupting the bilayer as shown using differential scanning calorimetry and fluorescence quenching studies of the hydrophobic Nile red probe. The electronic conductivity of the Liposome-PANI complexes, which stems from the doped PANI accessible on the liposome surface, is confirmed using conductive atomic force microscopy and electrochemical impedance spectroscopy. Further, short-term in vitro cell studies show that the complexes colocalize with the cell membrane without reducing cell proliferation. This study presents a novel fabrication route to conductive suspensions of conjugated polymer-liposome complexes suitable for potential applications at the biointerface.
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Affiliation(s)
- Minoo Eslami
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Erica Zeglio
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Division of Micro and Nanosystems, KTH Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Ghaida Alosaimi
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- School of Chemistry, Taif University, Taif, 26571, Kingdom of Saudi Arabia
| | - Yihan Yan
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Herleen Ruprai
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Alexander Macmillan
- Biomedical Imaging Facility, Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Jan Seidel
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Habib Joukhdar
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Jelena Rnjak-Kovacina
- Graduate School of Biomedical Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, New South Wales, 2052, Australia
- Australian Centre for Nano Medicine and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, UNSW Sydney, Sydney, New South Wales, 2052, Australia
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17
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Ruprai H, Shanu A, Mawad D, Hook JM, Kilian K, George L, Wuhrer R, Houang J, Myers S, Lauto A. Porous chitosan adhesives with L-DOPA for enhanced photochemical tissue bonding. Acta Biomater 2020; 101:314-326. [PMID: 31683016 DOI: 10.1016/j.actbio.2019.10.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 05/22/2019] [Revised: 09/27/2019] [Accepted: 10/30/2019] [Indexed: 12/23/2022]
Abstract
L-3,4-dihydroxyphenylalanine (L-DOPA) is a naturally occurring catechol that is known to increase the adhesive strength of various materials used for tissue repair. With the aim of fortifying a porous and erodible chitosan-based adhesive film, L-DOPA was incorporated in its fabrication for stronger photochemical tissue bonding (PTB), a repair technique that uses light and a photosensitiser to promote tissue adhesion. The results showed that L-DOPA did indeed increase the tissue bonding strength of the films when photoactivated by a green LED, with a maximum strength recorded of approximately 30 kPa, 1.4 times higher than in its absence. The addition of L-DOPA also did not appreciably change the swelling, mechanical and erodible properties of the film. This study showed that strong, porous and erodible adhesive films for PTB made from biocompatible materials can be obtained through a simple inclusion of a natural additive such as L-DOPA, which was simply mixed with chitosan without any chemical modifications. In vitro studies using human fibroblasts showed no negative effect on cell proliferation indicating that these films are biocompatible. The films are convenient for various surgical applications as they can provide strong tissue support and a microporous environment for cellular infusion without the use of sutures. STATEMENT OF SIGNIFICANCE: Tissue adhesives are not as strong as sutures on wounds under stress. Our group has previously demonstrated that strong sutureless tissue repair can be realised with chitosan-based adhesive films that photochemically bond to tissue when irradiated with green light. The advantage of this technique is that films are easier to handle than glues and sutures, and their crosslinking reactions can be controlled with light. However, these films are not optimal for high-tension tissue regenerative applications because of their non-porous structure, which cannot facilitate cell and nutrient exchange at the wound site. The present study resolves this issue, as we obtained a strong and porous photoactivated chitosan-based adhesive film, by simply using freeze drying and adding L-DOPA.
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Affiliation(s)
- Herleen Ruprai
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Anu Shanu
- School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Damia Mawad
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent BioNano Science and Technology, and Centre for Advanced Macromolecular Design, University of New South Wales, Sydney, NSW 2052, Australia.
| | - James M Hook
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia; School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Kristopher Kilian
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Laurel George
- Advanced Materials Characterization Facility, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Richard Wuhrer
- Advanced Materials Characterization Facility, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Jessica Houang
- Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW 2006, Australia.
| | - Simon Myers
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
| | - Antonio Lauto
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; Biomedical Engineering and Neuroscience Research Group, The MARCS Institute, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
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18
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Hopkins J, Fidanovski K, Lauto A, Mawad D. All-Organic Semiconductors for Electrochemical Biosensors: An Overview of Recent Progress in Material Design. Front Bioeng Biotechnol 2019; 7:237. [PMID: 31608275 PMCID: PMC6773807 DOI: 10.3389/fbioe.2019.00237] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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: 07/31/2019] [Accepted: 09/11/2019] [Indexed: 12/20/2022] Open
Abstract
Organic semiconductors remain of major interest in the field of bioelectrochemistry for their versatility in chemical and electrochemical behavior. These materials have been tailored using organic synthesis for use in cell stimulation, sustainable energy production, and in biosensors. Recent progress in the field of fully organic semiconductor biosensors is outlined in this review, with a particular emphasis on the synthetic tailoring of these semiconductors for their intended application. Biosensors ultimately function on the basis of a physical, optical or electrochemical change which occurs in the active material when it encounters the target analyte. Electrochemical biosensors are becoming increasingly popular among organic semiconductor biosensors, owing to their good detection performances, and simple operation. The analyte either interacts directly with the semiconductor material in a redox process or undergoes a redox process with a moiety such as an enzyme attached to the semiconductor material. The electrochemical signal is then transduced through the semiconductor material. The most recent examples of organic semiconductor biosensors are discussed here with reference to the material design of polymers with semiconducting backbones, specifically conjugated polymers, and polymer semiconducting dyes. We conclude that direct interaction between the analyte and the semiconducting material is generally more sensitive and cost effective, despite being currently limited by the need to identify, and synthesize selective sensing functionalities. It is also worth noting the potential roles of highly-sensitive, organic transistor devices and small molecule semiconductors, such as the photochromic and redox active molecule spiropyran, as polymer pendant groups in future biosensor designs.
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Affiliation(s)
- Jonathan Hopkins
- School of Materials Science and Engineering, University of New South Wales Sydney, Sydney, NSW, Australia.,Centre for Advanced Macromolecular Design, University of New South Wales Sydney, Sydney, NSW, Australia
| | - Kristina Fidanovski
- School of Materials Science and Engineering, University of New South Wales Sydney, Sydney, NSW, Australia.,Centre for Advanced Macromolecular Design, University of New South Wales Sydney, Sydney, NSW, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, NSW, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, University of New South Wales Sydney, Sydney, NSW, Australia.,Centre for Advanced Macromolecular Design, University of New South Wales Sydney, Sydney, NSW, Australia.,Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales Sydney, Sydney, NSW, Australia
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19
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Ruprai H, Romanazzo S, Ireland J, Kilian K, Mawad D, George L, Wuhrer R, Houang J, Ta D, Myers S, Lauto A. Porous Chitosan Films Support Stem Cells and Facilitate Sutureless Tissue Repair. ACS Appl Mater Interfaces 2019; 11:32613-32622. [PMID: 31418544 DOI: 10.1021/acsami.9b09123] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Photochemical tissue bonding with chitosan-based adhesive films is an experimental surgical technique that avoids the risk of thermal tissue injuries and the use of sutures to maintain strong tissue connection. This technique is advantageous over other tissue repair methods as it is minimally invasive and does not require mixing of multiple components before or during application. To expand the capability of the film to beyond just a tissue bonding device and promote tissue regeneration, in this study, we designed bioadhesive films that could also support stem cells. The films were modified with oligomeric chitosan to tune their erodibility and made porous through freeze-drying for better tissue integration. Of note, porous adhesive films (pore diameter ∼110 μm), with 10% of the chitosan being oligomeric, could retain similar tissue bonding strengths (13-15 kPa) to that of the nonporous chitosan-based adhesives used in previous studies when photoactivated. When tested in vitro, these films exhibited a mass loss of ∼20% after 7 days, swelling ratios of ∼270-300%, a percentage elongation of ∼90%, and both a tensile strength and Young's modulus of ∼1 MPa. The physical properties of the films were suitable for maintaining the viability and multipotency of bone-marrow-derived human mesenchymal stem cells over the duration of culture. Thus, these biocompatible, photoactivated porous, and erodible adhesive films show promise for applications in controlled cell delivery and regenerative medicine.
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Affiliation(s)
| | | | | | | | | | | | | | - Jessica Houang
- Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering , University of Sydney , Sydney , NSW 2006 , Australia
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20
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Sliow A, Ma Z, Gargiulo G, Mahns D, Mawad D, Breen P, Stoodley M, Houang J, Kuchel R, Tettamanzi GC, Tilley RD, Frost SJ, Morley J, Longo L, Lauto A. Stimulation and Repair of Peripheral Nerves Using Bioadhesive Graft-Antenna. Adv Sci (Weinh) 2019; 6:1801212. [PMID: 31179205 PMCID: PMC6548953 DOI: 10.1002/advs.201801212] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 03/05/2019] [Indexed: 06/09/2023]
Abstract
An original wireless stimulator for peripheral nerves based on a metal loop (diameter ≈1 mm) that is powered by a transcranial magnetic stimulator (TMS) and does not require circuitry components is reported. The loop can be integrated in a chitosan scaffold that functions as a graft when applied onto transected nerves (graft-antenna). The graft-antenna is bonded to rat sciatic nerves by a laser without sutures; it does not migrate after implantation and is able to trigger steady compound muscle action potentials for 12 weeks (CMAP ≈1.3 mV). Eight weeks postoperatively, axon regeneration is facilitated in transected nerves that are repaired with the graft-antenna and stimulated by the TMS for 1 h per week. The graft-antenna is an innovative and minimally-invasive device that functions concurrently as a wireless stimulator and adhesive scaffold for nerve repair.
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Affiliation(s)
- Ashour Sliow
- School of Science and HealthWestern Sydney UniversityLocked Bag 1797PenrithNSW2751Australia
| | - Zhi Ma
- School of MedicineWestern Sydney UniversityPenrithNSW2751Australia
| | - Gaetano Gargiulo
- Biomedical Engineering & Neuroscience Research GroupMARCS InstituteWestern Sydney UniversityPenrithNSW2751Australia
| | - David Mahns
- School of MedicineWestern Sydney UniversityPenrithNSW2751Australia
| | - Damia Mawad
- School of Materials Science and EngineeringUniversity of New South WalesKensingtonNSW2052Australia
| | - Paul Breen
- Biomedical Engineering & Neuroscience Research GroupMARCS InstituteWestern Sydney UniversityPenrithNSW2751Australia
| | - Marcus Stoodley
- The Australian School of Advanced MedicineMacquarie UniversityNorth RydeNSW2109Australia
| | - Jessica Houang
- School of Aerospace, Mechanical and Mechatronic EngineeringUniversity of SydneySydneyNSW2006Australia
| | - Rhiannon Kuchel
- Mark Wainwright Analytical CentreUniversity of New South WalesKensingtonNSW2052Australia
| | - Giuseppe C. Tettamanzi
- School of Physical Sciences and Institute for Photonics and Advanced SensingUniversity of AdelaideAdelaideSA5005Australia
| | - Richard D. Tilley
- Mark Wainwright Analytical CentreUniversity of New South WalesKensingtonNSW2052Australia
| | - Samuel J. Frost
- School of Science and HealthWestern Sydney UniversityLocked Bag 1797PenrithNSW2751Australia
| | - John Morley
- School of MedicineWestern Sydney UniversityPenrithNSW2751Australia
| | - Leonardo Longo
- Faculty of Human SciencesUniversity of the Republic of San MarinoContrada Omerelli47890Republic of San Marino
| | - Antonio Lauto
- School of Science and HealthWestern Sydney UniversityLocked Bag 1797PenrithNSW2751Australia
- School of MedicineWestern Sydney UniversityPenrithNSW2751Australia
- Biomedical Engineering & Neuroscience Research GroupMARCS InstituteWestern Sydney UniversityPenrithNSW2751Australia
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21
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Fidanovski K, Mawad D. Conjugated Polymers in Bioelectronics: Addressing the Interface Challenge. Adv Healthc Mater 2019; 8:e1900053. [PMID: 30941922 DOI: 10.1002/adhm.201900053] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [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: 01/11/2019] [Revised: 02/22/2019] [Indexed: 12/21/2022]
Abstract
Conjugated polymers are the material of choice for organic bioelectronic interfaces as they combine mechanical flexibility with electric and ionic conductivity. Their attractive properties are largely demonstrated in vitro, while the in vivo applications are limited to the coating of inorganic electrodes, where they are used to improve the intimate electronic contact between the device and the tissue. However, there has not been a commensurate rise in the in vivo applications of entirely organic implantable electronic devices based on conjugated polymers. To date, there is no comprehensive understanding of how these devices will interface with real biological systems. With the push toward increasingly thinner and more flexible next generation medical implants, this limitation remains a major detractor in the translation of conjugated polymers toward biological applications. This research news article examines the few reported in vivo studies and attempts to establish why there is such a dearth in the literature.
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Affiliation(s)
- Kristina Fidanovski
- School of Materials Science and Engineering UNSW Sydney Sydney New South Wales 2052 Australia
| | - Damia Mawad
- School of Materials Science and Engineering UNSW Sydney Sydney New South Wales 2052 Australia
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22
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Houang J, Perrone GG, Pedrinazzi C, Longo L, Mawad D, Boughton PC, Ruys AJ, Lauto A. Genetic Tolerance to Rose Bengal Photodynamic Therapy and Antifungal Clinical Application for Onychomycosis. Adv Therap 2018. [DOI: 10.1002/adtp.201800105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jessica Houang
- School of Aerospace; Mechanical and Mechatronic Engineering; University of Sydney; Sydney NSW 2006 Australia
| | - Gabriel G. Perrone
- School of Science and Health; Western Sydney University; Penrith NSW 2751 Australia
| | | | - Leonardo Longo
- School of Medicine; University of Siena; 53100 Siena Italy
| | - Damia Mawad
- School of Materials Science and Engineering; University of New South Wales; Sydney NSW 2052 Australia
- Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent BioNano Science and Technology; University of New South Wales; Sydney NSW 2052 Australia
- Centre for Advanced Macromolecular Design; University of New South Wales; Sydney NSW 2052 Australia
| | - Philip C. Boughton
- School of Aerospace; Mechanical and Mechatronic Engineering; University of Sydney; Sydney NSW 2006 Australia
| | - Andrew J. Ruys
- School of Aerospace; Mechanical and Mechatronic Engineering; University of Sydney; Sydney NSW 2006 Australia
| | - Antonio Lauto
- School of Science and Health; Western Sydney University; Penrith NSW 2751 Australia
- Biomedical Engineering and Neuroscience Research Group; The MARCS Institute; Western Sydney University; Penrith NSW 2751 Australia
- School of Medicine; Western Sydney University; Penrith NSW 2750 Australia
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23
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Cui C, Faraji N, Lauto A, Travaglini L, Tonkin J, Mahns D, Humphrey E, Terracciano C, Gooding JJ, Seidel J, Mawad D. A flexible polyaniline-based bioelectronic patch. Biomater Sci 2018; 6:493-500. [PMID: 29363686 DOI: 10.1039/c7bm00880e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bioelectronic materials based on conjugated polymers are being developed in the hope to interface with electroresponsive tissues. We have recently demonstrated that a polyaniline chitosan patch can efficiently electro-couple with cardiac tissue modulating its electrophysiology. As a promising bioelectronic material that can be tailored to different types of devices, we investigate here the impact of varying the synthesis conditions and time of the in situ polymerization of aniline (An) on the sheet resistance of the bioelectronic patch. The sheet resistance increases significantly for samples that have either the lowest molar ratio of oxidant to monomer or the highest molar ratio of dopant to monomer, while the polymerization time does not have a significant effect on the electrical properties. Conductive atomic force microscopy reveals that the patch with the lowest sheet resistance has a connected network of the conductive phase. In contrast, patches with higher sheet resistances exhibit conductive areas of lower current signals or isolated conductive islands of high current signals. Having identified the formulation that results in patches with optimal electrical properties, we used it to fabricate patches that were implanted in rats for two weeks. It is shown that the patch retains an electroactive nature, and only mild inflammation is observed with fibrous tissue encapsulating the patch.
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Affiliation(s)
- Chen Cui
- School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales 2052, Australia.
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24
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Jabbour R, Kapnisi K, Mawad D, Handa B, Couch L, Mansfield C, Perbillini F, Terracciano C, Stevens M, Lyon A, Smith G, Peters N, Ng FS, Harding S. P5705Conductive polymers affect myocardial conduction velocity but are not pro-arrhythmic. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5705] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- R Jabbour
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - K Kapnisi
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - D Mawad
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - B Handa
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - L Couch
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - C Mansfield
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - F Perbillini
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - C Terracciano
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - M Stevens
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - A Lyon
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - G Smith
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - N Peters
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - F S Ng
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
| | - S Harding
- Imperial College Healthcare NHS Trust, imperial, London, United Kingdom
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25
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Kapnisi M, Mansfield C, Marijon C, Guex AG, Perbellini F, Bardi I, Humphrey EJ, Puetzer JL, Mawad D, Koutsogeorgis DC, Stuckey DJ, Terracciano CM, Harding SE, Stevens MM. Auxetic Cardiac Patches with Tunable Mechanical and Conductive Properties toward Treating Myocardial Infarction. Adv Funct Mater 2018; 28:1800618. [PMID: 29875619 PMCID: PMC5985945 DOI: 10.1002/adfm.201800618] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Indexed: 05/27/2023]
Abstract
An auxetic conductive cardiac patch (AuxCP) for the treatment of myocardial infarction (MI) is introduced. The auxetic design gives the patch a negative Poisson's ratio, providing it with the ability to conform to the demanding mechanics of the heart. The conductivity allows the patch to interface with electroresponsive tissues such as the heart. Excimer laser microablation is used to micropattern a re-entrant honeycomb (bow-tie) design into a chitosan-polyaniline composite. It is shown that the bow-tie design can produce patches with a wide range in mechanical strength and anisotropy, which can be tuned to match native heart tissue. Further, the auxetic patches are conductive and cytocompatible with murine neonatal cardiomyocytes in vitro. Ex vivo studies demonstrate that the auxetic patches have no detrimental effect on the electrophysiology of both healthy and MI rat hearts and conform better to native heart movements than unpatterned patches of the same material. Finally, the AuxCP applied in a rat MI model results in no detrimental effect on cardiac function and negligible fibrotic response after two weeks in vivo. This approach represents a versatile and robust platform for cardiac biomaterial design and could therefore lead to a promising treatment for MI.
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Affiliation(s)
- Michaella Kapnisi
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, SW7 2AZ London, UK
| | - Catherine Mansfield
- National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Camille Marijon
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, SW7 2AZ London, UK; National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Anne Geraldine Guex
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, SW7 2AZ London, UK; National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Filippo Perbellini
- National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Ifigeneia Bardi
- National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Eleanor J Humphrey
- National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Jennifer L Puetzer
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, SW7 2AZ London, UK
| | - Damia Mawad
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, SW7 2AZ London, UK
| | | | - Daniel J Stuckey
- Centre for Advanced Biomedical Imaging, University College London, WC1E 6DD London, UK
| | | | - Sian E Harding
- National Heart and Lung Institute, Imperial College London, W12 0NN London, UK
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London, SW7 2AZ London, UK
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26
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Houang J, Perrone G, Mawad D, Boughton PC, Ruys AJ, Lauto A. Light treatments of nail fungal infections. J Biophotonics 2018; 11:e201700350. [PMID: 29227574 DOI: 10.1002/jbio.201700350] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 11/20/2017] [Accepted: 12/07/2017] [Indexed: 06/07/2023]
Abstract
Nail fungal infections are notoriously persistent and difficult to treat which can lead to severe health impacts, particularly in the immunocompromized. Current antifungal treatments, including systemic and topical drugs, are prolonged and do not effectively provide a complete cure. Severe side effects are also associated with systemic antifungals, such as hepatotoxicity. Light treatments of onychomycosis are an emerging therapy that has localized photodynamic, photothermal or photoablative action. These treatments have shown to be an effective alternative to traditional antifungal remedies with comparable or better cure rates achieved in shorter times and without systemic side effects. This report reviews significant clinical and experimental studies in the field, highlighting mechanisms of action and major effects related to light therapy; in particular, the impact of light on fungal genetics.
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Affiliation(s)
- Jessica Houang
- Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW, Australia
| | - Gabriel Perrone
- School of Science and Health, Western Sydney University, Penrith, NSW, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, University of New South Wales, Kensington, NSW, Australia
- Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent BioNano Science and Technology, University of New South Wales, Sydney, NSW, Australia
- Centre for Advanced Macromolecular Design, University of New South Wales, Sydney, NSW, Australia
| | - Philip C Boughton
- Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW, Australia
| | - Andrew J Ruys
- Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW, Australia
| | - Antonio Lauto
- School of Science and Health, Western Sydney University, Penrith, NSW, Australia
- School of Medicine, Western Sydney University, Penrith, NSW, Australia
- Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Penrith, NSW, Australia
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27
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Frost SJ, Mawad D, Wuhrer R, Myers S, Lauto A. Semitransparent bandages based on chitosan and extracellular matrix for photochemical tissue bonding. Biomed Eng Online 2018; 17:7. [PMID: 29357892 PMCID: PMC5778659 DOI: 10.1186/s12938-018-0444-1] [Citation(s) in RCA: 5] [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: 10/05/2017] [Accepted: 01/16/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Extracellular matrices (ECMs) are often used in reconstructive surgery to enhance tissue regeneration and remodeling. Sutures and staples are currently used to fix ECMs to tissue although they can be invasive devices. Other sutureless and less invasive techniques, such as photochemical tissue bonding, cannot be coupled to ECMs because of their intrinsic opacity to light. RESULTS We succeeded in fabricating a biocompatible and adhesive device that is based on ovine forestomach matrix (OFM) and a chitosan adhesive. The natural opacity of the OFM has been overcome by adding the adhesive into the matrix that allows for the light to effectively penetrate through it. The OFM-chitosan device is semitransparent (attenuation length ~ 106 µm) and can be photoactivated by green light to bond to tissue. This device does not require sutures or staples and guarantees a bonding strength of ~ 23 kPa. CONCLUSIONS A new semitransparent and biocompatible bandage has been successfully fabricated and characterized for sutureless tissue bonding.
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Affiliation(s)
- Samuel J Frost
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia.,Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent BioNano Science and Technology, UNSW Sydney, Sydney, NSW, 2052, Australia.,Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Richard Wuhrer
- Advanced Materials Characterization Facility (AMCF), Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Simon Myers
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.,School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Antonio Lauto
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia. .,School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia. .,Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.
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28
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Jiang L, Gentile C, Lauto A, Cui C, Song Y, Romeo T, Silva SM, Tang O, Sharma P, Figtree G, Gooding JJ, Mawad D. Versatile Fabrication Approach of Conductive Hydrogels via Copolymerization with Vinyl Monomers. ACS Appl Mater Interfaces 2017; 9:44124-44133. [PMID: 29172417 DOI: 10.1021/acsami.7b15019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Functionalized poly(ethylene dioxythiophene) (f-PEDOT) was copolymerized with two vinyl monomers of different hydrophilicity, acrylic acid and hydroxyethyl methacrylate, to produce electroconductive hydrogels with a range of physical and electronic properties. These hydrogels not only possessed tailored physical properties, such as swelling ratios and mechanical properties, but also displayed electroactivity dependent on the chemical composition of the network. Raman spectroscopy indicated that the functional PEDOT in the hydrogels is in an oxidized form, most likely accounting for the good electrochemical response of the hydrogels observed in physiological buffer. In vitro cell studies showed that cardiac cells respond differently when seeded on hydrogel substrates with different compositions. This study presents a facile approach for the fabrication of electroconductive hydrogels with a range of properties, paving the way for scaffolds that can meet the requirements of different electroresponsive tissues.
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Affiliation(s)
| | - Carmine Gentile
- Cardiothoracic and Vascular Health, Kolling Institute, Sydney Medical School (Northern), University of Sydney , Sydney, New South Wales 2000, Australia
- Beth Israel Deaconess Medical Center, Harvard Medical School , Boston, Massachusetts 02115, United States
| | - Antonio Lauto
- Biomedical Engineering and Neuroscience (BENS) Research Group, University of Western Sydney , Penrith, New South Wales 2751, Australia
| | | | | | - Tony Romeo
- Electron Microscopy Centre, Innovation Campus, University of Wollongong , Squires Way, Fairy Meadow, Wollongong, New South Wales 2519, Australia
| | | | - Owen Tang
- Cardiothoracic and Vascular Health, Kolling Institute, Sydney Medical School (Northern), University of Sydney , Sydney, New South Wales 2000, Australia
| | - Poonam Sharma
- Cardiothoracic and Vascular Health, Kolling Institute, Sydney Medical School (Northern), University of Sydney , Sydney, New South Wales 2000, Australia
| | - Gemma Figtree
- Cardiothoracic and Vascular Health, Kolling Institute, Sydney Medical School (Northern), University of Sydney , Sydney, New South Wales 2000, Australia
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29
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Humphrey EJ, Kapnisi M, Mawad D, Peters NS, Stevens MM, Terracciano CM. Abstract 188: Manipulation of Excitation-contraction Coupling in Cardiomyocytes Using Conductive Polyaniline Scaffolds. Circ Res 2017. [DOI: 10.1161/res.121.suppl_1.188] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The application of tissue engineered patches made of conductive polymer scaffolds combined with cardiomyocytes (CMs) could provide a dual method of improving the damaged myocardium after an infarction: firstly by introducing functional CMs to the area; secondly the conductive polymer could modulate electrical transmission across the scar tissue. Polyaniline (PANI) scaffolds are one such example, however, the consequences of growing CMs on conductive PANI scaffolds with regards to CM electrophysiology are unknown. In this study we assess the hypothesis that conductive PANI scaffolds affect CM calcium transients and action potential morphology in culture. Neonatal rat ventricular myocytes (NRVMs) and neonatal rat fibroblasts were co-cultured on conductive and non-conductive (sodium hydroxide treated) PANI scaffolds and remained viable after four days of culture, covering the surface of the construct. Compared to those cultured on non-conductive PANI scaffolds, NRVM cultured on conductive PANI scaffolds show faster calcium transients, measured using Fluo-4AM and field stimulated at 1 Hz, with a decrease in the time to peak (t
p
non-conductive=105±6 ms, t
p
conductive= 85±5 ms, p<0.05, n=6) and time to 50% (t
50
non-conductive=212±12 ms, t
50
conductive= 116±7 ms, p<0.001, n=6) and 90% decay (t
90
non-conductive=404±24 ms, t
90
conductive= 266±15 ms, p<0.001, n=6). Action potential morphology, assessed using FluoVolt membrane potential dye and stimulated at 1 Hz, remain unchanged for conductive and non-conductive PANI scaffolds. The PANI scaffolds are compatible with NRVMs and the cells have good viability after four days in culture. The conductive PANI scaffolds have a significant effect on myocyte calcium cycling but this is not caused by a change in action potential morphology. Further work is required to understand the mechanism behind the change in calcium handling in the CMs on the conductive PANI scaffolds.
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Affiliation(s)
| | | | - Damia Mawad
- Imperial College London, London, United Kingdom
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30
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Spicer CD, Booth MA, Mawad D, Armgarth A, Nielsen CB, Stevens MM. Synthesis of Hetero-bifunctional, End-Capped Oligo-EDOT Derivatives. Chem 2017; 2:125-138. [PMID: 28149959 PMCID: PMC5268340 DOI: 10.1016/j.chempr.2016.12.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 08/11/2016] [Revised: 11/09/2016] [Accepted: 12/09/2016] [Indexed: 11/17/2022]
Abstract
Conjugated oligomers of 3,4-ethylenedioxythiophene (EDOT) are attractive materials for tissue engineering applications and as model systems for studying the properties of the widely used polymer poly(3,4-ethylenedioxythiophene). We report here the facile synthesis of a series of keto-acid end-capped oligo-EDOT derivatives (n = 2-7) through a combination of a glyoxylation end-capping strategy and iterative direct arylation chain extension. Importantly, these structures not only represent the longest oligo-EDOTs reported but are also bench stable, in contrast to previous reports on such oligomers. The constructs reported here can undergo subsequent derivatization for integration into higher-order architectures, such as those required for tissue engineering applications. The synthesis of hetero-bifunctional constructs, as well as those containing mixed-monomer units, is also reported, allowing further complexity to be installed in a controlled manner. Finally, we describe the optical and electrochemical properties of these oligomers and demonstrate the importance of the keto-acid in determining their characteristics.
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Affiliation(s)
- Christopher D. Spicer
- Departments of Materials and Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Marsilea A. Booth
- Departments of Materials and Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Damia Mawad
- Departments of Materials and Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Astrid Armgarth
- Departments of Materials and Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Christian B. Nielsen
- Materials Research Institute and School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
| | - Molly M. Stevens
- Departments of Materials and Bioengineering, Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
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31
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Mawad D, Figtree G, Gentile C. Current Technologies Based on the Knowledge of the Stem Cells Microenvironments. Advances in Experimental Medicine and Biology 2017; 1041:245-262. [DOI: 10.1007/978-3-319-69194-7_13] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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32
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Mawad D, Mansfield C, Lauto A, Perbellini F, Nelson GW, Tonkin J, Bello SO, Carrad DJ, Micolich AP, Mahat MM, Furman J, Payne D, Lyon AR, Gooding JJ, Harding SE, Terracciano CM, Stevens MM. A conducting polymer with enhanced electronic stability applied in cardiac models. Sci Adv 2016; 2:e1601007. [PMID: 28138526 PMCID: PMC5262463 DOI: 10.1126/sciadv.1601007] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [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: 05/05/2016] [Accepted: 10/27/2016] [Indexed: 05/18/2023]
Abstract
Electrically active constructs can have a beneficial effect on electroresponsive tissues, such as the brain, heart, and nervous system. Conducting polymers (CPs) are being considered as components of these constructs because of their intrinsic electroactive and flexible nature. However, their clinical application has been largely hampered by their short operational time due to a decrease in their electronic properties. We show that, by immobilizing the dopant in the conductive scaffold, we can prevent its electric deterioration. We grew polyaniline (PANI) doped with phytic acid on the surface of a chitosan film. The strong chelation between phytic acid and chitosan led to a conductive patch with retained electroactivity, low surface resistivity (35.85 ± 9.40 kilohms per square), and oxidized form after 2 weeks of incubation in physiological medium. Ex vivo experiments revealed that the conductive nature of the patch has an immediate effect on the electrophysiology of the heart. Preliminary in vivo experiments showed that the conductive patch does not induce proarrhythmogenic activities in the heart. Our findings set the foundation for the design of electronically stable CP-based scaffolds. This provides a robust conductive system that could be used at the interface with electroresponsive tissue to better understand the interaction and effect of these materials on the electrophysiology of these tissues.
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Affiliation(s)
- Damia Mawad
- Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
- Department of Materials, Imperial College London, London SW7 2AZ, U.K
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
- Corresponding author. (D.M.); (M.M.S.)
| | - Catherine Mansfield
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, U.K
| | - Antonio Lauto
- Biomedical Engineering and Neuroscience Research Group, University of Western Sydney, Penrith, New South Wales 2751, Australia
| | - Filippo Perbellini
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, U.K
| | | | - Joanne Tonkin
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, U.K
| | - Sean O. Bello
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, U.K
| | - Damon J. Carrad
- School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Adam P. Micolich
- School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Mohd M. Mahat
- Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
- Faculty of Applied Sciences Universiti Teknologi Mara, 40450 Shah Alam, Selangor, Malaysia
| | - Jennifer Furman
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, U.K
| | - David Payne
- Department of Materials, Imperial College London, London SW7 2AZ, U.K
| | - Alexander R. Lyon
- National Heart and Lung Institute, Imperial College London, London SW7 2AZ, U.K
- National Institute for Health Research Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, U.K
| | - J. Justin Gooding
- School of Chemistry, Australian Centre for NanoMedicine and Australian Research Council Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Sian E. Harding
- National Institute for Health Research Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, U.K
| | | | - Molly M. Stevens
- Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
- Department of Materials, Imperial College London, London SW7 2AZ, U.K
- Corresponding author. (D.M.); (M.M.S.)
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33
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Mawad D, Artzy-Schnirman A, Tonkin J, Ramos J, Inal S, Mahat M, Darwish N, Zwi-Dantsis L, Malliaras GG, Gooding JJ, Lauto A, Stevens MM. Electroconductive Hydrogel Based on Functional Poly(Ethylenedioxy Thiophene). Chem Mater 2016; 28:6080-6088. [PMID: 27656042 PMCID: PMC5024651 DOI: 10.1021/acs.chemmater.6b01298] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 07/25/2016] [Indexed: 05/18/2023]
Abstract
Poly(ethylene dioxythiophene) with functional pendant groups bearing double bonds is synthesized and employed for the fabrication of electroactive hydrogels with advantageous characteristics: covalently cross-linked porous 3D scaffolds with notable swelling ratio, appropriate mechanical properties, electroactivity in physiological conditions, and suitability for proliferation and differentiation of C2C12 cells. This is a new approach for the fabrication of conductive engineered constructs.
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Affiliation(s)
- Damia Mawad
- Department
of Materials, Department of Bioengineering, Institute of Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
- School
of Materials Science and Engineering, UNSW
Australia, Sydney, New South Wales 2052, Australia
- E-mail:
| | - Arbel Artzy-Schnirman
- Department
of Materials, Department of Bioengineering, Institute of Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Joanne Tonkin
- Faculty
of Medicine, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jose Ramos
- Department
of Materials, Department of Bioengineering, Institute of Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
- POLYMAT,
Bionanoparticles Group, University of the
Basque Country UPV/EHU, Donostia-San
Sebastián 20018, Spain
| | - Sahika Inal
- Department
of Bioelectronics, Ecole Nationale Superieure
des Mines, CMP-EMSE, MOC, Gardanne 13541, France
| | - Muzamir
M. Mahat
- Department
of Materials, Department of Bioengineering, Institute of Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - Nadim Darwish
- Nanochemistry
Research Institute, Department of Chemistry, Faculty of Science and
Engineering, Curtin University, Perth, Western Australia 6102, Australia
| | - Limor Zwi-Dantsis
- Department
of Materials, Department of Bioengineering, Institute of Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
| | - George G. Malliaras
- Department
of Bioelectronics, Ecole Nationale Superieure
des Mines, CMP-EMSE, MOC, Gardanne 13541, France
| | - J. Justin Gooding
- School
of Chemistry, Australian Centre for NanoMedicine and ARC Centre of
Excellence in Convergent BioNano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Antonio Lauto
- Biomedical
Engineering and Neuroscience (BENS) Research Group, University of Western Sydney, Penrith, New South Wales 2751, Australia
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering, Institute of Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
- E-mail:
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Andre E, Yaniz-Galende E, Hamilton C, Dusting GJ, Hellen N, Poulet CE, Diez Cunado M, Smits AM, Lowe V, Eckardt D, Du Pre B, Sanz Ruiz R, Moerkamp AT, Tribulova N, Smani T, Liskova YV, Greco S, Guzzolino E, Franco D, Lozano-Velasco E, Knorr M, Pavoine C, Bukowska A, Van Linthout S, Miteva K, Sulzgruber P, Latet SC, Portnychenko A, Cannavo A, Kamilova U, Sagach VF, Santin Y, Octavia Y, Haller PM, Octavia Y, Rubies C, Dei Zotti F, Wong KHK, Gonzalez Miqueo A, Kruithof BPT, Kadur Nagaraju C, Shaposhnikova Y, Songia P, Lindner D, Wilson C, Benzoni P, Fabbri A, Campostrini G, Jorge E, Casini S, Mengarelli I, Nikolov A, Bublikov DS, Kheloufi M, Rubies C, Walker RE, Van Dijk RA, Posthuma JJ, Dumitriu IE, Karshovska E, Sakic A, Alexandru N, Martin-Lorenzo M, Molica F, Taylor RF, Mcarthur L, Crocini C, Matsuyama TA, Mazzoni L, Lin WK, Owen TJ, Scigliano M, Sheehan A, Bezerra Gurgel AR, Bromage DI, Kiss A, Ikeda G, Pickard JMJ, Wirth G, Casos K, Khudiakov A, Nistal JF, Ferrantini C, Park SJ, Di Maggio S, Gentile F, Dini L, Buyandelger B, Larrasa-Alonso J, Schirmer I, Chin SH, Cimiotti D, Martini H, Hohensinner PJ, Garabito M, Zeni F, Licholai S, De Bortoli M, Sivitskaya L, Viczenczova C, Rainer PP, Smith LE, Suna G, Gambardella J, Cozma A, De Gonzalo Calvo D, Scoditti E, Clark BJ, Mansfield C, Eckardt D, Gomez L, Llucia-Valldeperas A, De Pauw A, Porporato P, Bouzin C, Draoui N, Sonveaux P, Balligand JL, Mougenot N, Formicola L, Nadaud S, Dierick F, Hajjar RJ, Marazzi G, Sassoon D, Hulot JS, Zamora VR, Burton FL, Macquaide N, Smith GL, Hernandez D, Sivakumaran P, Millard R, Wong RCB, Pebay A, Shepherd RK, Lim SY, Owen T, Jabbour RJ, Kloc M, Kodagoda T, Denning C, Harding SE, Ramos S, Terracciano C, Gorelik J, Wei K, Bushway P, Ruiz-Lozano P, Mercola M, Moerkamp AT, Vegh AMD, Dronkers E, Lodder K, Van Herwaarden T, Goumans MJ, Pellet-Many C, Zachary I, Noack K, Bosio A, Feyen DAM, Demkes EJ, Dierickx PJ, Doevendans PA, Vos MA, Van Veen AAB, Van Laake LW, Fernandez Santos ME, Suarez Sancho S, Fuentes Arroyo L, Plasencia Martin V, Velasco Sevillano P, Casado Plasencia A, Climent AM, Guillem M, Atienza Fernandez F, Fernandez-Aviles F, Dingenouts CKE, Lodder K, Kruithof BPT, Van Herwaarden T, Vegh AMD, Goumans MJ, Smits AM, Knezl V, Szeiffova Bacova B, Egan Benova T, Viczenczova C, Goncalvesova E, Slezak J, Calderon-Sanchez E, Diaz I, Ordonez A, Salikova SP, Zaccagnini G, Voellenkle C, Sadeghi I, Maimone B, Castelvecchio S, Gaetano C, Menicanti L, Martelli F, Hatcher C, D'aurizio R, Groth M, Baugmart M, Mercatanti A, Russo F, Mariani L, Magliaro C, Pitto L, Lozano-Velasco E, Jodar-Garcia A, Galiano-Torres J, Lopez-Navarrete I, Aranega A, Wagensteen R, Quesada A, Aranega A, Franco D, Finger S, Karbach S, Kossmann S, Muenzel T, Wenzel P, Keck M, Mougenot N, Favier S, Fuand A, Atassi F, Barbier C, Lompre AM, Hulot JS, Nikonova Y, Pluteanu F, Kockskaemper J, Chilukoti RK, Wolke C, Lendeckel U, Gardemann A, Goette A, Miteva K, Pappritz K, Mueller I, El-Shafeey M, Ringe J, Tschoepe C, Pappritz K, El-Shafeey M, Ringe J, Tschoepe C, Van Linthout S, Koller L, Richter B, Blum S, Koprak M, Huelsmann M, Pacher R, Goliasch G, Wojta J, Niessner A, Van Herck PL, Claeys MJ, Haine SE, Lenders GD, Miljoen HP, Segers VF, Vandendriescche TR, Hoymans VY, Vrints CJ, Lapikova-Bryhinska T, Gurianova V, Portnichenko H, Vasylenko M, Zapara Y, Portnichenko V, Liccardo D, Lymperopoulos A, Santangelo M, Leosco D, Koch WJ, Ferrara N, Rengo G, Alieva T, Rasulova Z, Masharipova D, Dorofeyeva NA, Drachuk KO, Sicard P, Yucel Y, Dutaur M, Vindis C, Parini A, Mialet-Perez J, Van Deel ED, De Boer M, De Waard MC, Duncker DJ, Nagel F, Inci M, Santer D, Hallstroem S, Podesser BK, Kararigas G, De Boer M, Kietadisorn R, Swinnen M, Duimel H, Verheyen F, Chrifi I, Brandt MM, Cheng C, Janssens S, Moens AL, Duncker DJ, Batlle M, Dantas AP, Sanz M, Sitges M, Mont L, Guasch E, Lobysheva I, Beauloye C, Balligand JL, Vanhoutte PM, Tang EHC, Beaumont J, Lopez B, Ravassa S, Hermida N, Valencia F, Gomez-Doblas JJ, San Jose G, De Teresa E, Diez J, Van De Merbel AF, Kruithof-De Julio M, Goumans MJ, Claus P, Dries E, Angelo Singh A, Vermeulen K, Roderick HL, Sipido KR, Driesen RB, Ilchenko I, Bobronnikova L, Myasoedova V, Alamanni F, Tremoli E, Poggio P, Becher PM, Gotzhein F, Klingel K, Blankenberg S, Westermann D, Zi M, Cartwright E, Campostrini G, Bonzanni M, Milanesi R, Bucchi A, Baruscotti M, Difrancesco D, Barbuti A, Fantini M, Wilders R, Severi S, Benzoni P, Dell' Era P, Serzanti M, Olesen MS, Muneretto C, Bisleri G, Difrancesco D, Baruscotti M, Bucchi A, Barbuti A, Amoros-Figueras G, Raga S, Campos B, Alonso-Martin C, Rodriguez-Font E, Vinolas X, Cinca J, Guerra JM, Mengarelli I, Schumacher CA, Veldkamp MW, Verkerk AO, Remme CA, Veerman C, Guan K, Stauske M, Tan H, Barc J, Wilde A, Verkerk A, Bezzina C, Tsinlikov I, Tsinlikova I, Nicoloff G, Blazhev A, Garev A, Andrienko AV, Lychev VG, Vorobova EN, Anchugina DA, Vion AC, Hammoutene A, Poisson J, Dupont N, Souyri M, Tedgui A, Codogno P, Boulanger CM, Rautou PE, Dantas AP, Batlle M, Guasch E, Torres M, Montserrat JM, Almendros I, Mont L, Austin CA, Holt CM, Rijs K, Wezel A, Hamming JF, Kolodgie FD, Virmani R, Schaapherder AF, Lindeman JHN, Posma JJN, Van Oerle R, Spronk HMH, Ten Cate H, Dinkla S, Kaski JC, Schober A, Chaabane C, Ambartsumian N, Grigorian M, Bochaton-Piallat ML, Dragan E, Andrei E, Niculescu L, Georgescu A, Gonzalez-Calero L, Maroto AS, Martinez PJ, Heredero A, Aldamiz-Echevarria G, Vivanco F, Alvarez-Llamas G, Meens MJ, Pelli G, Foglia B, Scemes E, Kwak BR, Caldwell JL, Eisner DA, Dibb KM, Trafford AW, Chilton L, Smith GL, Nicklin SA, Coppini R, Ferrantini C, Yan P, Loew LM, Poggesi C, Cerbai E, Pavone FS, Sacconi L, Tanaka H, Ishibashi-Ueda H, Takamatsu T, Coppini R, Ferrantini C, Gentile F, Pioner JM, Santini L, Sartiani L, Bargelli V, Poggesi C, Mugelli A, Cerbai E, Maciejewska M, Bolton EL, Wang Y, O'brien F, Ruas M, Lei M, Sitsapesan R, Galione A, Terrar DA, Smith JG, Garcia D, Barriales-Villa R, Monserrat L, Harding SE, Denning C, Marston SB, Watson S, Tkach S, Faggian G, Terracciano CM, Perbellini F, Eiros Zamora J, Papadaki M, Messer A, Marston S, Gould I, Johnston A, Dunne M, Smith G, Kemi OJ, Pillai M, Davidson SM, Yellon DM, Tratsiakovich Y, Jang J, Gonon AT, Pernow J, Matoba T, Koga J, Egashira K, Burke N, Davidson SM, Yellon DM, Korpisalo P, Hakkarainen H, Laidinen S, Yla-Herttuala S, Ferrer-Curriu G, Perez M, Permanyer E, Blasco-Lucas A, Gracia JM, Castro MA, Barquinero J, Galinanes M, Kostina D, Kostareva A, Malashicheva A, Merino D, Ruiz L, Gomez J, Juarez C, Gil A, Garcia R, Hurle MA, Coppini R, Pioner JM, Gentile F, Mazzoni L, Rossi A, Tesi C, Belardinelli L, Olivotto I, Cerbai E, Mugelli A, Poggesi C, Eun-Ji EJ, Lim BK, Choi DJ, Milano G, Bertolotti M, De Marchis F, Zollo F, Sommariva E, Capogrossi MC, Pompilio G, Bianchi ME, Raucci A, Pioner JM, Coppini R, Scellini B, Tardiff J, Tesi C, Poggesi C, Ferrantini C, Mazzoni L, Sartiani L, Coppini R, Diolaiuti L, Ferrari P, Cerbai E, Mugelli A, Mansfield C, Luther P, Knoell R, Villalba M, Sanchez-Cabo F, Lopez-Olaneta MM, Ortiz-Sanchez P, Garcia-Pavia P, Lara-Pezzi E, Klauke B, Gerdes D, Schulz U, Gummert J, Milting H, Wake E, Kocsis-Fodor G, Brack KE, Ng GA, Kostareva A, Smolina N, Majchrzak M, Moehner D, Wies A, Milting H, Stehle R, Pfitzer G, Muegge A, Jaquet K, Maggiorani D, Lefevre L, Dutaur M, Mialet-Perez J, Parini A, Cussac D, Douin-Echinard V, Ebenbauer B, Kaun C, Prager M, Wojta J, Rega-Kaun G, Costa G, Onetti Y, Jimenez-Altayo F, Vila E, Dantas AP, Milano G, Bertolotti M, Scopece A, Piacentini L, Bianchi ME, Capogrossi MC, Pompilio G, Colombo G, Raucci A, Blaz M, Kapelak B, Sanak M, Bauce B, Calore C, Lorenzon A, Calore M, Poloni G, Mazzotti E, Rigato I, Daliento L, Basso C, Thiene G, Melacini P, Corrado D, Rampazzo A, Danilenko NG, Vaikhanskaya TG, Davydenko OG, Szeiffova Bacova B, Kura B, Egan Benova T, Yin CH, Kukreja R, Slezak J, Tribulova N, Lee DI, Sorge M, Glabe C, Paolocci N, Guarnieri C, Tomaselli GF, Kass DA, Van Eyk JE, Agnetti G, Cordwell SJ, White MY, Wojakowski W, Lynch M, Barallobre-Barreiro J, Yin X, Mayr U, White S, Jahingiri M, Hill J, Mayr M, Sorriento D, Ciccarelli M, Fiordelisi A, Campiglia P, Trimarco B, Iaccarino G, Sitar Taut AV, Schiau S, Orasan O, Halloumi W, Negrean V, Zdrenghea D, Pop D, Van Der Meer RW, Rijzewijk LJ, Smit JWA, Revuelta-Lopez E, Nasarre L, Escola-Gil JC, Lamb HJ, Llorente-Cortes V, Pellegrino M, Massaro M, Carluccio MA, Calabriso N, Wabitsch M, Storelli C, De Caterina R, Church SJ, Callagy S, Begley P, Kureishy N, Mcharg S, Bishop PN, Unwin RD, Cooper GJS, Mawad D, Perbellini F, Tonkin J, Bello SO, Simonotto JD, Lyon AR, Stevens MM, Terracciano CM, Harding SE, Kernbach M, Czichowski V, Bosio A, Fuentes L, Hernandez-Redondo I, Guillem MS, Fernandez ME, Sanz R, Atienza F, Climent AM, Fernandez-Aviles F, Soler-Botija C, Prat-Vidal C, Galvez-Monton C, Roura S, Perea-Gil I, Bragos R, Bayes-Genis A. Poster session 1Cell growth, differentiation and stem cells - Heart72Understanding the metabolism of cardiac progenitor cells: a first step towards controlling their proliferation and differentiation?73Expression of pw1/peg3 identifies a new cardiac adult stem cell population involved in post-myocardial infarction remodeling74Long-term stimulation of iPS-derived cardiomyocytes using optogenetic techniques to promote phenotypic changes in E-C coupling75Benefits of electrical stimulation on differentiation and maturation of cardiomyocytes from human induced pluripotent stem cells76Constitutive beta-adrenoceptor-mediated cAMP production controls spontaneous automaticity of human induced pluripotent stem cell-derived cardiomyocytes77Formation and stability of T-tubules in cardiomyocytes78Identification of miRNAs promoting human cardiomyocyte proliferation by regulating Hippo pathway79A direct comparison of foetal to adult epicardial cell activation reveals distinct differences relevant for the post-injury response80Role of neuropilins in zebrafish heart regeneration81Highly efficient immunomagnetic purification of cardiomyocytes derived from human pluripotent stem cells82Cardiac progenitor cells posses a molecular circadian clock and display large 24-hour oscillations in proliferation and stress tolerance83Influence of sirolimus and everolimus on bone marrow-derived mesenchymal stem cell biology84Endoglin is important for epicardial behaviour following cardiac injuryCell death and apoptosis - Heart87Ultrastructural alterations reflecting Ca2+ handling and cell-to-cell coupling disorders precede occurrence of severe arrhythmias in intact animal heart88Urocortin-1 promotes cardioprotection through ERK1/2 and EPAC pathways: role in apoptosis and necrosis89Expression p38 MAPK and Cas-3 in myocardium LV of rats with experimental heart failure at melatonin and enalapril introductionTranscriptional control and RNA species - Heart92Accumulation of beta-amyloid 1-40 in HF patients: the role of lncRNA BACE1-AS93Role of miR-182 in zebrafish and mouse models of Holt-Oram syndrome94Mir-27 distinctly regulates muscle-enriched transcription factors and growth factors in cardiac and skeletal muscle cells95AF risk factors impair PITX2 expression leading to Wnt-microRNA-ion channel remodelingCytokines and cellular inflammation - Heart98Post-infarct survival depends on the interplay of monocytes, neutrophils and interferon gamma in a mouse model of myocardial Infarction99Inflammatory cd11b/c cells play a protective role in compensated cardiac hypertrophy by promoting an orai3-related pro-survival signal100Anti-inflammatory effects of endothelin receptor blockade in the atrial tissue of spontaneously hypertensive rats101Mesenchymal stromal cells reduce NLRP3 inflammasome activity in Coxsackievirus B3-induced myocarditis102Mesenchymal stromal cells modulate monocytes trafficking in Coxsackievirus B3-induced myocarditis103The impact of regulatory T lymphocytes on long-term mortality in patients with chronic heart failure104Temporal dynamics of dendritic cells after ST-elevation myocardial infarction relate with improvement of myocardial functionGrowth factors and neurohormones - Heart107Preconditioning of hypertrophied heart: miR-1 and IGF-1 crosstalk108Modulation of catecholamine secretion from human adrenal chromaffin cells by manipulation of G protein-coupled receptor kinase-2 activity109Evaluation of cyclic adenosin-3,5- monophosphate and neurohormones in patients with chronic heart failureNitric oxide and reactive oxygen species - Heart112Hydrogen sulfide donor inhibits oxidative and nitrosative stress, cardiohemodynamics disturbances and restores cNOS coupling in old rats113Role and mechanisms of action of aldehydes produced by monoamine oxidase A in cardiomyocyte death and heart failure114Exercise training has contrasting effects in myocardial infarction and pressure-overload due to different endothelial nitric oxide synthase regulation115S-Nitroso Human Serum Albumin dose-dependently leads to vasodilation and alters reactive hyperaemia in coronary arteries of an isolated mouse heart model116Modulating endothelial nitric oxide synthase with folic acid attenuates doxorubicin-induced cardiomyopathy119Effects of long-term very high intensity exercise on aortic structure and function in an animal model120Electron paramagnetic resonance spectroscopy quantification of nitrosylated hemoglobin (HbNO) as an index of vascular nitric oxide bioavailability in vivo121Deletion of repressor activator protein 1 impairs acetylcholine-induced relaxation due to production of reactive oxygen speciesExtracellular matrix and fibrosis - Heart124MicroRNA-19b is associated with myocardial collagen cross-linking in patients with severe aortic stenosis. Potential usefulness as a circulating biomarker125A new ex vivo model to study cardiac fibrosis126Heterogeneity of fibrosis and fibroblast differentiation in the left ventricle after myocardial infarction127Effect of carbohydrate metabolism degree compensation to the level of galectin-3 changes in hypertensive patients with chronic heart failure and type 2 diabetes mellitus128Statin paradox in association with calcification of bicuspid aortic valve interstitial cells129Cardiac function remains impaired despite reversible cardiac fibrosis after healed experimental viral myocarditisIon channels, ion exchangers and cellular electrophysiology - Heart132Identifying a novel role for PMCA1 (Atp2b1) in heart rhythm instability133Mutations of the caveolin-3 gene as a predisposing factor for cardiac arrhythmias134The human sinoatrial node action potential: time for a computational model135iPSC-derived cardiomyocytes as a model to dissect ion current alterations of genetic atrial fibrillation136Postextrasystolic potentiation in healthy and diseased hearts: effects of the site of origin and coupling interval of the preceding extrasystole137Absence of Nav1.8-based (late) sodium current in rabbit cardiomyocytes and human iPSC-CMs138hiPSC-derived cardiomyocytes from Brugada Syndrome patients without identified mutations do not exhibit cellular electrophysiological abnormalitiesMicrocirculation141Atherogenic indices, collagen type IV turnover and the development of microvascular complications- study in diabetics with arterial hypertension142Changes in the microvasculature and blood viscosity in women with rheumatoid arthritis, hypercholesterolemia and hypertensionAtherosclerosis145Shear stress regulates endothelial autophagy: consequences on endothelial senescence and atherogenesis146Obstructive sleep apnea causes aortic remodeling in a chronic murine model147Aortic perivascular adipose tissue displays an aged phenotype in early and late atherosclerosis in ApoE-/- mice148A systematic evaluation of the cellular innate immune response during the process of human atherosclerosis149Inhibition of Coagulation factor Xa increases plaque stability and attenuates the onset and progression of atherosclerotic plaque in apolipoprotein e-deficient mice150Regulatory CD4+ T cells from patients with atherosclerosis display pro-inflammatory skewing and enhanced suppression function151Hypoxia-inducible factor (HIF)-1alpha regulates macrophage energy metabolism by mediating miRNAs152Extracellular S100A4 is a key player of smooth muscle cell phenotypic transition: implications in atherosclerosis153Microparticles of healthy origins improve atherosclerosis-associated endothelial progenitor cell dysfunction via microRNA transfer154Arterial remodeling and metabolism impairment in early atherosclerosis155Role of pannexin1 in atherosclerotic plaque formationCalcium fluxes and excitation-contraction coupling158Amphiphysin II induces tubule formation in cardiac cells159Interleukin 1 beta regulation of connexin 43 in cardiac fibroblasts and the effects of adult cardiac myocyte:fibroblast co-culture on myocyte contraction160T-tubular electrical defects contribute to blunted beta-adrenergic response in heart failure161Beat-to-beat variability of intracellular Ca2+ dynamics of Purkinje cells in the infarct border zone of the mouse heart revealed by rapid-scanning confocal microscopy162The efficacy of late sodium current blockers in hypertrophic cardiomyopathy is dependent on genotype: a study on transgenic mouse models with different mutations163Synthesis of cADPR and NAADP by intracellular CD38 in heart: role in inotropic and arrhythmogenic effects of beta-adrenoceptor signalingContractile apparatus166Towards an engineered heart tissue model of HCM using hiPSC expressing the ACTC E99K mutation167Diastolic mechanical load delays structural and functional deterioration of ultrathin adult heart slices in culture168Structural investigation of the cardiac troponin complex by molecular dynamics169Exercise training restores myocardial and oxidative skeletal muscle function from myocardial infarction heart failure ratsOxygen sensing, ischaemia and reperfusion172A novel antibody specific to full-length stromal derived factor-1 alpha reveals that remote conditioning induces its cleavage by endothelial dipeptidyl peptidase 4173Attenuation of myocardial and vascular arginase activity by vagal nerve stimulation via a mechanism involving alpha-7 nicotinic receptor during cardiac ischemia and reperfusion174Novel nanoparticle-mediated medicine for myocardial ischemia-reperfusion injury simultaneously targeting mitochondrial injury and myocardial inflammation175Acetylcholine plays a key role in myocardial ischaemic preconditioning via recruitment of intrinsic cardiac ganglia176The role of nitric oxide and VEGFR-2 signaling in post ischemic revascularization and muscle recovery in aged hypercholesterolemic mice177Efficacy of ischemic preconditioning to protect the human myocardium: the role of clinical conditions and treatmentsCardiomyopathies and fibrosis180Plakophilin-2 haploinsufficiency leads to impaired canonical Wnt signaling in ARVC patient181Improved technique for customized, easier, safer and more reliable transverse aortic arch banding and debanding in mice as a model of pressure overload hypertrophy182Late sodium current inhibitors for the treatment of inducible obstruction and diastolic dysfunction in hypertrophic cardiomyopathy: a study on human myocardium183Angiotensin II receptor antagonist fimasartan has protective role of left ventricular fibrosis and remodeling in the rat ischemic heart184Role of High-Mobility Group Box 1 (HMGB1) redox state on cardiac fibroblasts activities and heart function after myocardial infarction185Atrial remodeling in hypertrophic cardiomyopathy: insights from mouse models carrying different mutations in cTnT186Electrophysiological abnormalities in ventricular cardiomyocytes from a Maine Coon cat with hypertrophic cardiomyopathy: effects of ranolazine187ZBTB17 is a novel cardiomyopathy candidate gene and regulates autophagy in the heart188Inhibition of SRSF4 in cardiomyocytes induces left ventricular hypertrophy189Molecular characterization of a novel cardiomyopathy related desmin frame shift mutation190Autonomic characterisation of electro-mechanical remodeling in an in-vitro leporine model of heart failure191Modulation of Ca2+-regulatory function by three novel mutations in TNNI3 associated with severe infant restrictive cardiomyopathyAging194The aging impact on cardiac mesenchymal like stromal cells (S+P+)195Reversal of premature aging markers after bariatric surgery196Sex-associated differences in vascular remodeling during aging: role of renin-angiotensin system197Role of the receptor for advanced glycation end-products (RAGE) in age dependent left ventricle dysfunctionsGenetics and epigenetics200hsa-miR-21-5p as a key factor in aortic remodeling during aneurysm formation201Co-inheritance of mutations associated with arrhythmogenic and hypertrophic cardiomyopathy in two Italian families202Lamin a/c hot spot codon 190: form various amino acid substitutions to clinical effects203Treatment with aspirin and atorvastatin attenuate cardiac injury induced by rat chest irradiation: Implication of myocardial miR-1, miR-21, connexin-43 and PKCGenomics, proteomics, metabolomics, lipidomics and glycomics206Differential phosphorylation of desmin at serines 27 and 31 drives the accumulation of preamyloid oligomers in heart failure207Potential role of kinase Akt2 in the reduced recovery of type 2 diabetic hearts subjected to ischemia / reperfusion injury208A proteomics comparison of extracellular matrix remodelling in porcine coronary arteries upon stent implantationMetabolism, diabetes mellitus and obesity211Targeting grk2 as therapeutic strategy for cancer associated to diabetes212Effects of salbutamol on large arterial stiffness in patients with metabolic syndrome213Circulating microRNA-1 and microRNA-133a: potential biomarkers of myocardial steatosis in type 2 diabetes mellitus214Anti-inflammatory nutrigenomic effects of hydroxytyrosol in human adipocytes - protective mechanisms of mediterranean diets in obesity-related inflammation215Alterations in the metal content of different cardiac regions within a rat model of diabetic cardiomyopathyTissue engineering218A novel conductive patch for application in cardiac tissue engineering219Establishment of a simplified and improved workflow from neonatal heart dissociation to cardiomyocyte purification and characterization220Effects of flexible substrate on cardiomyocytes cell culture221Mechanical stretching on cardiac adipose progenitors upregulates sarcomere-related genes. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw135] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Frost SJ, Mawad D, Hook J, Lauto A. Micro- and Nanostructured Biomaterials for Sutureless Tissue Repair. Adv Healthc Mater 2016; 5:401-14. [PMID: 26725593 DOI: 10.1002/adhm.201500589] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/23/2015] [Indexed: 01/01/2023]
Abstract
Sutureless procedures for wound repair and closure have recently integrated nanostructured devices to improve their effectiveness and clinical outcome. This review highlights the major advances in gecko-inspired bioadhesives that relies mostly on van der Waals bonding forces. These are challenged by the moist environment of surgical settings that weaken adherence to tissue. The incorporation of nanoparticles in biomatrices and their role in tissue repair and drug delivery is also reviewed with an emphasis on procedures involving adhesives that are laser-activated. Nanostructured adhesive devices have the advantage of being minimally invasive to tissue, can seal wounds, and deliver drugs in situ. All these tasks are very difficult to accomplish by sutures or staples that are invasive to host organs and often cause scarring.
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Affiliation(s)
- Samuel J. Frost
- School of Science and Health; University of Western Sydney; Penrith NSW 2751 Australia
| | - D. Mawad
- Department of Materials; Imperial College London; SW7 2AZ UK
- School of Materials Science and Engineering; University of New South Wales; Sydney 2052 Australia
| | - J. Hook
- School of Chemistry; University of New South Wales; Sydney 2052 Australia
| | - Antonio Lauto
- School of Science and Health; University of Western Sydney; Penrith NSW 2751 Australia
- The Biomedical Engineering and Neuroscience (BENS) Research Group; The MARCS Institute; Penrith NSW 2751 Australia
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Mawad D, Warren C, Barton M, Mahns D, Morley J, Pham BT, Pham NT, Kueh S, Lauto A. Lysozyme depolymerization of photo-activated chitosan adhesive films. Carbohydr Polym 2015; 121:56-63. [DOI: 10.1016/j.carbpol.2014.12.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 12/08/2014] [Accepted: 12/10/2014] [Indexed: 02/07/2023]
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Barton MJ, Morley JW, Mahns DA, Mawad D, Wuhrer R, Fania D, Frost SJ, Loebbe C, Lauto A. Tissue repair strength using chitosan adhesives with different physical-chemical characteristics. J Biophotonics 2014; 7:948-955. [PMID: 24395818 DOI: 10.1002/jbio.201300148] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 09/15/2013] [Revised: 10/21/2013] [Accepted: 11/06/2013] [Indexed: 06/03/2023]
Abstract
A range of chitosan-based biomaterials have recently been used to perform sutureless, laser-activated tissue repair. Laser-activation has the advantage of bonding to tissue through a non-contact, aseptic mechanism. Chitosan adhesive films have also been shown to adhere to sheep intestine strongly without any chemical modification to chitosan. In this study, we continue to investigate chitosan adhesive films and explore the impact on the tissue repair strength and tensile strength characteristics of four types of adhesive film based on chitosan with different molecular weight and degree of deacetylation. Results showed that adhesives based on chitosan with medium molecular weight achieved the highest bonding strength, tensile strength and E-modulus when compared to the other adhesives.
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Affiliation(s)
- Matthew J Barton
- School of Medicine, University of Western Sydney, Locked Bag 1797 Penrith, NSW, 2751, Australia
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Cronin L, Moffitt M, Mawad D, Morton OC, Lauto A, Stack C. An in vitro study of the photodynamic effect of rose bengal on Trichophyton rubrum. J Biophotonics 2014; 7:410-417. [PMID: 23125143 DOI: 10.1002/jbio.201200168] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 08/28/2012] [Revised: 09/26/2012] [Accepted: 10/03/2012] [Indexed: 06/01/2023]
Abstract
Onychomycosis, a fungal infection of the finger or toenails, is predominantly caused by Trichophyton rubrum. Treatment is difficult due to high recurrence rates and problems with treatment compliance. For these reasons, alternative therapies are needed. Here we describe the photoactivation of Rose Bengal (RB) using a green laser (λ = 532 nm) at fluences of 68, 133 and 228 J/cm(2) , and assess its fungicidal activity on T. rubrum spore suspensions. A 140 µM RB solution was able to induce a fungicidal effect on T. rubrum when photosensitized with the fluence of 228 J/cm(2) . RB photosensitization using a green laser provides a potential novel treatment for T. rubrum infections.
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Affiliation(s)
- Leah Cronin
- School of Science and Health, University of Western Sydney, Campbelltown NSW 2560, Australia
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Barton M, Morley JW, Stoodley MA, Ng KS, Piller SC, Duong H, Mawad D, Mahns DA, Lauto A. Laser-activated adhesive films for sutureless median nerve anastomosis. J Biophotonics 2013; 6:938-949. [PMID: 23712961 DOI: 10.1002/jbio.201300054] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [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: 04/01/2013] [Revised: 05/03/2013] [Accepted: 05/06/2013] [Indexed: 06/02/2023]
Abstract
A novel chitosan adhesive film that incorporates the dye 'Rose Bengal' (RB) was used in conjunction with a green laser to repair transected rat median nerves in vivo. Histology and electrophysiological recording assessed the impact of the laser-adhesive technique on nerves. One week post-operatively, the sham-control group (laser-adhesive technique applied on un-transected nerves) conserved the average number and size of myelinated fibres in comparison to its contralateral side and electrophysiological recordings demonstrated no significant difference with un-operated nerves. Twelve weeks after the laser-adhesive anastomoses, nerves were in continuity with regenerated axons that crossed the anastomotic site.
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Affiliation(s)
- Mathew Barton
- School of Medicine, University of Western Sydney, Locked Bag 1797 Penrith, NSW, 2751, Australia
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Lauto A, Stoodley M, Barton M, Morley JW, Mahns DA, Longo L, Mawad D. Fabrication and application of rose bengal-chitosan films in laser tissue repair. J Vis Exp 2012:4158. [PMID: 23117629 DOI: 10.3791/4158] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Photochemical tissue bonding (PTB) is a sutureless technique for tissue repair, which is achieved by applying a solution of rose bengal (RB) between two tissue edges(1,2). These are then irradiated by a laser that is selectively absorbed by the RB. The resulting photochemical reactions supposedly crosslink the collagen fibers in the tissue with minimal heat production(3). In this report, RB has been incorporated in thin chitosan films to fabricate a novel tissue adhesive that is laser-activated. Adhesive films, based on chitosan and containing ~0.1 wt% RB, are fabricated and bonded to calf intestine and rat tibial nerves by a solid state laser (λ=532 nm, Fluence~110 J/cm(2), spot size~0.5 cm). A single-column tensiometer, interfaced with a personal computer, is used to test the bonding strength. The RB-chitosan adhesive bonds firmly to the intestine with a strength of 15 ± 6 kPa, (n=30). The adhesion strength drops to 2 ± 2 kPa (n=30) when the laser is not applied to the adhesive. The anastomosis of tibial nerves can be also completed without the use of sutures. A novel chitosan adhesive has been fabricated that bonds photochemically to tissue and does not require sutures.
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Affiliation(s)
- Antonio Lauto
- Bioelectronics and Neuroscience (BENS) research group, University of Western Sydney, NSW Australia.
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Mawad D, Boughton EA, Boughton P, Lauto A. Advances in hydrogels applied to degenerative diseases. Curr Pharm Des 2012; 18:2558-75. [PMID: 22512441 DOI: 10.2174/138161212800492895] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Accepted: 01/04/2012] [Indexed: 11/22/2022]
Abstract
Hydrogels are currently applied in the treatment of numerous degenerative diseases because of their three dimensional (3D) nature, high water content and wide range of polymers that can be used for their fabrication. Hydrogels have been investigated and commercialized, for example, as soft contact lens-based ophthalmic drug delivery systems. These novel devices improved the bioavailability of ophthalmic drugs and their residence time. Hydrogels are also being investigated to facilitate and augment targeted delivery of chemotherapeutic agents. This approach minimizes significantly the side effects associated with conventional administration of anti-cancer therapeutics. The application of hydrogels as 3D scaffold has recently gained momentum because they can mimic key features of the extracellular matrix. For this reason, hydrogels are representing a viable alternative to traditional tumor xenograft in cancer biology studies. This review highlights recent advances in the development of hydrogels that are applied in degenerative diseases such as ocular, cancer, spine and cartilage degenerative pathologies.
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Affiliation(s)
- Damia Mawad
- ARC Center of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, NSW, Australia.
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Barton M, Piller SC, Mahns DA, Morley JW, Mawad D, Longo L, Lauto A. In vitro cell compatibility study of rose bengal-chitosan adhesives. Lasers Surg Med 2012; 44:762-8. [DOI: 10.1002/lsm.22076] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2012] [Indexed: 01/01/2023]
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Viry L, Moulton SE, Romeo T, Suhr C, Mawad D, Cook M, Wallace GG. Emulsion-coaxial electrospinning: designing novel architectures for sustained release of highly soluble low molecular weight drugs. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31069d] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Mawad D, Gilmore K, Molino P, Wagner K, Wagner P, Officer DL, Wallace GG. An erodible polythiophene-based composite for biomedical applications. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10259a] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lauto A, Mawad D, Barton M, Gupta A, Piller SC, Hook J. Photochemical tissue bonding with chitosan adhesive films. Biomed Eng Online 2010; 9:47. [PMID: 20825632 PMCID: PMC2949880 DOI: 10.1186/1475-925x-9-47] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [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: 06/08/2010] [Accepted: 09/08/2010] [Indexed: 11/10/2022] Open
Abstract
Background Photochemical tissue bonding (PTB) is a promising sutureless technique for tissue repair. PTB is often achieved by applying a solution of rose bengal (RB) between two tissue edges, which are irradiated by a green laser to crosslink collagen fibers with minimal heat production. In this study, RB has been incorporated in chitosan films to create a novel tissue adhesive that is laser-activated. Methods Adhesive films, based on chitosan and containing ~0.1 wt% RB were manufactured and bonded to calf intestine by a solid state laser (λ = 532 nm, Fluence~110 J/cm2, spot size~0.5 cm). A single-column tensiometer, interfaced with a personal computer, tested the bonding strength. K-type thermocouples recorded the temperature (T) at the adhesive-tissue interface during laser irradiation. Human fibroblasts were also seeded on the adhesive and cultured for 48 hours to assess cell growth. Results The RB-chitosan adhesive bonded firmly to the intestine with adhesion strength of 15 ± 2 kPa, (n = 31). The adhesion strength dropped to 0.5 ± 0.1 (n = 8) kPa when the laser was not applied to the adhesive. The average temperature of the adhesive increased from 26°C to 32°C during laser exposure. Fibroblasts grew confluent on the adhesive without morphological changes. Conclusion A new biocompatible chitosan adhesive has been developed that bonds photochemically to tissue with minimal temperature increase.
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Affiliation(s)
- Antonio Lauto
- School of Biomedical and Health Sciences, School of Medicine, University of Western Sydney, NSW, Australia.
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Mawad D, Lauto A, Penciu A, Méhier H, Fenet B, Fessi H, Chevalier Y. Synthesis and characterization of novel radiopaque poly(allyl amine) nanoparticles. Nanotechnology 2010; 21:335603. [PMID: 20657050 DOI: 10.1088/0957-4484/21/33/335603] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Contrast agents are currently used in a variety of diagnostic imaging techniques, including computer tomography for early cancer detection. Radiopaque nanoparticles have recently been proposed as an alternative method to traditional contrast agents that may allow for long-term image tracking. The aim of this study was the preparation and characterization of aqueous suspensions of radiopaque nanoparticles made of poly(allyl amine) derivatives. Poly(allylamine) (PA) was modified by grafting either 4-iodobenzoyl chloride or 2,3,5-triiodobenzoyl chloride to make the polymer x-ray visible. Nanoparticles of the modified PA were prepared by the nanoprecipitation method and purified with respect to residual organic solvents. Stable suspensions of spherical particles of sub-micronic diameter were characterized by dynamic light scattering and transmission electron microscopy. In addition, the 4.5 wt% suspensions of nanoparticles displayed an x-ray visibility ranging between 185 and 235 HU. The non-clustering ability of the novel PA radiopaque nanoparticles suggests they could be injected via a catheter without clogging or sedimentation.
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Affiliation(s)
- Damia Mawad
- Laboratoire d'Automatique et de Génie des Procédés, LAGEP, Université Lyon 1, CNRS UMR 5007, 43 bd 11 Novembre, 69622 Villeurbanne, France
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Mawad D, Mouaziz H, Penciu A, Méhier H, Fenet B, Fessi H, Chevalier Y. Elaboration of radiopaque iodinated nanoparticles for in situ control of local drug delivery. Biomaterials 2009; 30:5667-74. [DOI: 10.1016/j.biomaterials.2009.06.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Accepted: 06/15/2009] [Indexed: 11/26/2022]
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Mawad D, Odell R, Poole-Warren LA. Network structure and macromolecular drug release from poly(vinyl alcohol) hydrogels fabricated via two crosslinking strategies. Int J Pharm 2009; 366:31-7. [DOI: 10.1016/j.ijpharm.2008.08.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 08/26/2008] [Accepted: 08/26/2008] [Indexed: 12/01/2022]
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Mawad D, Foster JL, Lauto A. Drug-delivery study and estimation of polymer–solvent interaction parameter for bisacrylate ester-modified Pluronic hydrogels. Int J Pharm 2008; 360:231-5. [DOI: 10.1016/j.ijpharm.2008.04.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Revised: 04/14/2008] [Accepted: 04/21/2008] [Indexed: 10/22/2022]
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