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Anand S, Fusco A, Günday C, Günday-Türeli N, Donnarumma G, Danti S, Moroni L, Mota C. Tunable ciprofloxacin delivery through personalized electrospun patches for tympanic membrane perforations. Bioact Mater 2024; 38:109-123. [PMID: 38699239 PMCID: PMC11063525 DOI: 10.1016/j.bioactmat.2024.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 03/17/2024] [Accepted: 04/01/2024] [Indexed: 05/05/2024] Open
Abstract
Approximately 740 million symptomatic patients are affected by otitis media every year. Being an inflammatory disease affecting the middle ear, it is one of the primary causes of tympanic membrane (TM) perforations, often resulting in impaired hearing abilities. Antibiotic therapy using broad-spectrum fluoroquinolones, such as ciprofloxacin (CIP), is frequently employed and considered the optimal route to treat otitis media. However, patients often get exposed to high dosages to compensate for the low drug concentration reaching the affected site. Therefore, this study aims to integrate tissue engineering with drug delivery strategies to create biomimetic scaffolds promoting TM regeneration while facilitating a localized release of CIP. Distinct electrospinning (ES) modalities were designed in this regard either by blending CIP into the polymer ES solution or by incorporating nanoparticles-based co-ES/electrospraying. The combination of these modalities was investigated as well. A broad range of release kinetic profiles was achieved from the fabricated scaffolds, thereby offering a wide spectrum of antibiotic concentrations that could serve patients with diverse therapeutic needs. Furthermore, the incorporation of CIP into the TM patches demonstrated a favorable influence on their resultant mechanical properties. Biological studies performed with human mesenchymal stromal cells confirmed the absence of any cytotoxic or anti-proliferative effects from the released antibiotic. Finally, antibacterial assays validated the efficacy of CIP-loaded scaffolds in suppressing bacterial infections, highlighting their promising relevance for TM applications.
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Affiliation(s)
- Shivesh Anand
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6229 ER, Maastricht, the Netherlands
| | - Alessandra Fusco
- Interuniversity National Consortiums of Materials Science and Technology (INSTM), 50121, Firenze, Italy
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, 80138, Naples, Italy
| | - Cemre Günday
- MyBiotech GmbH, Industriestraße 1B, 66802, Uberherrn, Germany
| | | | - Giovanna Donnarumma
- Interuniversity National Consortiums of Materials Science and Technology (INSTM), 50121, Firenze, Italy
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, 80138, Naples, Italy
| | - Serena Danti
- Interuniversity National Consortiums of Materials Science and Technology (INSTM), 50121, Firenze, Italy
- Department of Civil and Industrial Engineering, University of Pisa, 56122, Pisa, Italy
| | - Lorenzo Moroni
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6229 ER, Maastricht, the Netherlands
| | - Carlos Mota
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6229 ER, Maastricht, the Netherlands
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2
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Kim S, Goo W, Karima G, Lee JH, Kim HD. Polyacrylamide/Gel-Based Self-Healing Artificial Tympanic Membrane for Drug Delivery of Otitis Treatment. Biomater Res 2024; 28:0049. [PMID: 38952716 PMCID: PMC11214819 DOI: 10.34133/bmr.0049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 05/26/2024] [Indexed: 07/03/2024] Open
Abstract
One of the bacterial infections caused by tympanic membrane perforation is otitis media (OM). Middle ear inflammation causes continuous pain and can be accompanied by aftereffects such as facial nerve paralysis if repeated chronically. Therefore, it is necessary to develop an artificial tympanic membrane (TM) that can effectively regenerate the eardrum due to the easy implantation and removal of OM inflammation. In this study, we synthesized hydrogel by mixing gelatin and polyacrylamide. Cefuroxime sodium salt was then incorporated into this hydrogel to both regenerate the TM and treat OM. Cytotoxicity experiments confirmed the biocompatibility of hydrogels equipped with antibiotics, and we conducted drug release and antibacterial experiments to examine continuous drug release. Through experiments, we have verified the excellent biocompatibility, drug release ability, and antibacterial effectiveness of hydrogel. It holds the potential to serve as an effective strategy for treating OM and regenerating TM as a drug delivery substance.
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Affiliation(s)
- Sujin Kim
- Department of IT Convergence (Brain Korea Plus 21),
Korea National University of Transportation, Chungju, 27469, Republic of Korea
| | - Woonhoe Goo
- Department of Otorhinolaryngology-Head and Neck Surgery,
Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Gul Karima
- Department of Polymer Science and Engineering,
Korea National University of Transportation, Chungju, 27469, Republic of Korea
| | - Jun Ho Lee
- Department of Otorhinolaryngology-Head and Neck Surgery,
Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Hwan D. Kim
- Department of IT Convergence (Brain Korea Plus 21),
Korea National University of Transportation, Chungju, 27469, Republic of Korea
- Department of Polymer Science and Engineering,
Korea National University of Transportation, Chungju, 27469, Republic of Korea
- Department of Biomedical Engineering,
Korea National University of Transportation, Chungju, 27469, Republic of Korea
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Xu C, Yang K, Xu Y, Meng X, Zhou Y, Xu Y, Li X, Qiao W, Shi J, Zhang D, Wang J, Xu W, Yang H, Luo Z, Dong N. Melt-electrowriting-enabled anisotropic scaffolds loaded with valve interstitial cells for heart valve tissue Engineering. J Nanobiotechnology 2024; 22:378. [PMID: 38943185 PMCID: PMC11212200 DOI: 10.1186/s12951-024-02656-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Accepted: 06/19/2024] [Indexed: 07/01/2024] Open
Abstract
Tissue engineered heart valves (TEHVs) demonstrates the potential for tissue growth and remodel, offering particular benefit for pediatric patients. A significant challenge in designing functional TEHV lies in replicating the anisotropic mechanical properties of native valve leaflets. To establish a biomimetic TEHV model, we employed melt-electrowriting (MEW) technology to fabricate an anisotropic PCL scaffold. By integrating the anisotropic MEW-PCL scaffold with bioactive hydrogels (GelMA/ChsMA), we successfully crafted an elastic scaffold with tunable mechanical properties closely mirroring the structure and mechanical characteristics of natural heart valves. This scaffold not only supports the growth of valvular interstitial cells (VICs) within a 3D culture but also fosters the remodeling of extracellular matrix of VICs. The in vitro experiments demonstrated that the introduction of ChsMA improved the hemocompatibility and endothelialization of TEHV scaffold. The in vivo experiments revealed that, compared to their non-hydrogel counterparts, the PCL-GelMA/ChsMA scaffold, when implanted into SD rats, significantly suppressed immune reactions and calcification. In comparison with the PCL scaffold, the PCL-GelMA/ChsMA scaffold exhibited higher bioactivity and superior biocompatibility. The amalgamation of MEW technology and biomimetic design approaches provides a new paradigm for manufacturing scaffolds with highly controllable microstructures, biocompatibility, and anisotropic mechanical properties required for the fabrication of TEHVs.
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Affiliation(s)
- Chao Xu
- College of Materials Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technology, Wuhan Textile University, No.1 Sunshine Avenue, Jiangxia District, Wuhan, 430200, China
| | - Kun Yang
- College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, China
| | - Yin Xu
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430000, China
| | - Xiangfu Meng
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, 368 Youyi Avenue, Wuchang District, Wuhan, 430062, China
| | - Ying Zhou
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430000, China
| | - Yanping Xu
- College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, China
| | - Xueyao Li
- College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, China
| | - Weihua Qiao
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430000, China
| | - Jiawei Shi
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430000, China
| | - Donghui Zhang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, 368 Youyi Avenue, Wuchang District, Wuhan, 430062, China
| | - Jianglin Wang
- College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, China
| | - Weilin Xu
- College of Materials Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technology, Wuhan Textile University, No.1 Sunshine Avenue, Jiangxia District, Wuhan, 430200, China
| | - Hongjun Yang
- College of Materials Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technology, Wuhan Textile University, No.1 Sunshine Avenue, Jiangxia District, Wuhan, 430200, China.
| | - Zhiqiang Luo
- College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, China.
| | - Nianguo Dong
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430000, China.
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4
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Vernon MJ, Mela P, Dilley RJ, Jansen S, Doyle BJ, Ihdayhid AR, De-Juan-Pardo EM. 3D printing of heart valves. Trends Biotechnol 2024; 42:612-630. [PMID: 38238246 DOI: 10.1016/j.tibtech.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 05/04/2024]
Abstract
3D printing technologies have the potential to revolutionize the manufacture of heart valves through the ability to create bespoke, complex constructs. In light of recent technological advances, we review the progress made towards 3D printing of heart valves, focusing on studies that have utilised these technologies beyond manufacturing patient-specific moulds. We first overview the key requirements of a heart valve to assess functionality. We then present the 3D printing technologies used to engineer heart valves. By referencing International Organisation for Standardisation (ISO) Standard 5840 (Cardiovascular implants - Cardiac valve prostheses), we provide insight into the achieved functionality of these valves. Overall, 3D printing promises to have a significant positive impact on the creation of artificial heart valves and potentially unlock full complex functionality.
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Affiliation(s)
- Michael J Vernon
- T3mPLATE, Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre and University of Western Australia Centre for Medical Research, The University of Western Australia, Perth, WA 6009, Australia; Vascular Engineering Laboratory, Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre and University of Western Australia Centre for Medical Research, The University of Western Australia, Perth, WA 6009, Australia; School of Engineering, The University of Western Australia, Perth, WA 6009, Australia
| | - Petra Mela
- Medical Materials and Implants, Department of Mechanical Engineering, Munich Institute of Biomedical Engineering and TUM School of Engineering and Design, Technical University of Munich, Boltzmannstrasse 15, 85748 Garching, Germany
| | - Rodney J Dilley
- T3mPLATE, Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre and University of Western Australia Centre for Medical Research, The University of Western Australia, Perth, WA 6009, Australia
| | - Shirley Jansen
- Curtin Medical School, Curtin University, Perth, WA 6102, Australia; School of Medicine, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, WA 6009, Australia; Department of Vascular and Endovascular Surgery, Sir Charles Gairdner Hospital, Perth, WA 6009, Australia; Heart and Vascular Research Institute, Harry Perkins Institute of Medical Research, Perth, WA 6009, Australia
| | - Barry J Doyle
- Vascular Engineering Laboratory, Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre and University of Western Australia Centre for Medical Research, The University of Western Australia, Perth, WA 6009, Australia; School of Engineering, The University of Western Australia, Perth, WA 6009, Australia
| | - Abdul R Ihdayhid
- T3mPLATE, Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre and University of Western Australia Centre for Medical Research, The University of Western Australia, Perth, WA 6009, Australia; Curtin Medical School, Curtin University, Perth, WA 6102, Australia; Department of Cardiology, Fiona Stanley Hospital, Perth, WA 6150, Australia
| | - Elena M De-Juan-Pardo
- T3mPLATE, Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre and University of Western Australia Centre for Medical Research, The University of Western Australia, Perth, WA 6009, Australia; School of Engineering, The University of Western Australia, Perth, WA 6009, Australia; Curtin Medical School, Curtin University, Perth, WA 6102, Australia.
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5
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Janssen R, Benito-Zarza L, Cleijpool P, Valverde MG, Mihăilă SM, Bastiaan-Net S, Garssen J, Willemsen LEM, Masereeuw R. Biofabrication Directions in Recapitulating the Immune System-on-a-Chip. Adv Healthc Mater 2024:e2304569. [PMID: 38625078 DOI: 10.1002/adhm.202304569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/19/2024] [Indexed: 04/17/2024]
Abstract
Ever since the implementation of microfluidics in the biomedical field, in vitro models have experienced unprecedented progress that has led to a new generation of highly complex miniaturized cell culture platforms, known as Organs-on-a-Chip (OoC). These devices aim to emulate biologically relevant environments, encompassing perfusion and other mechanical and/or biochemical stimuli, to recapitulate key physiological events. While OoCs excel in simulating diverse organ functions, the integration of the immune organs and immune cells, though recent and challenging, is pivotal for a more comprehensive representation of human physiology. This comprehensive review covers the state of the art in the intricate landscape of immune OoC models, shedding light on the pivotal role of biofabrication technologies in bridging the gap between conceptual design and physiological relevance. The multifaceted aspects of immune cell behavior, crosstalk, and immune responses that are aimed to be replicated within microfluidic environments, emphasizing the need for precise biomimicry are explored. Furthermore, the latest breakthroughs and challenges of biofabrication technologies in immune OoC platforms are described, guiding researchers toward a deeper understanding of immune physiology and the development of more accurate and human predictive models for a.o., immune-related disorders, immune development, immune programming, and immune regulation.
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Affiliation(s)
- Robine Janssen
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Laura Benito-Zarza
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Pim Cleijpool
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Marta G Valverde
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Silvia M Mihăilă
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Shanna Bastiaan-Net
- Wageningen Food & Biobased Research, Wageningen University & Research, Wageningen, 6708 WG, The Netherlands
| | - Johan Garssen
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
- Danone Global Research & Innovation Center, Danone Nutricia Research B.V., Utrecht, 3584 CT, The Netherlands
| | - Linette E M Willemsen
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
| | - Rosalinde Masereeuw
- Department of Pharmaceutical Sciences, Pharmacology, Utrecht University, Utrecht, 3584 CG, The Netherlands
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6
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Yüksel MB, Atik AC, Külah H. Piezoelectric Multi-Channel Bilayer Transducer for Sensing and Filtering Ossicular Vibration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308277. [PMID: 38380504 DOI: 10.1002/advs.202308277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/10/2024] [Indexed: 02/22/2024]
Abstract
This paper presents an acoustic transducer for fully implantable cochlear implants (FICIs), which can be implanted on the hearing chain to detect and filter the ambient sound in eight frequency bands between 250 and 6000 Hz. The transducer dimensions are conventional surgery compatible. The structure is formed with 3 × 3 × 0.36 mm active space for each layer and 5.2 mg total active mass excluding packaging. Characterization of the transducer is carried on an artificial membrane whose vibration characteristic is similar to the umbo vibration. On the artificial membrane, piezoelectric transducer generates up to 320.3 mVpp under 100 dB sound pressure level (SPL) excitation and covers the audible acoustic frequency. The measured signal-to-noise-ratio (SNR) of the channels is up to 84.2 dB. Sound quality of the transducer for fully implantable cochlear implant application is graded with an objective qualification method (PESQ) for the first time in the literature to the best of the knowledge, and scored 3.42/4.5.
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Affiliation(s)
- Muhammed Berat Yüksel
- Department of Electrical and Electronics Engineering, Middle East Technical University (METU), Universiteler Mah. Dumlipinar Blv. No:1, Ankara, 06800, Turkey
- METU MEMS Center, Mustafa Kemal Mah, Dumlupınar Bulvarı No: 280, Ankara, 06350, Turkey
| | - Ali Can Atik
- Department of Electrical and Electronics Engineering, Middle East Technical University (METU), Universiteler Mah. Dumlipinar Blv. No:1, Ankara, 06800, Turkey
- METU MEMS Center, Mustafa Kemal Mah, Dumlupınar Bulvarı No: 280, Ankara, 06350, Turkey
| | - Haluk Külah
- Department of Electrical and Electronics Engineering, Middle East Technical University (METU), Universiteler Mah. Dumlipinar Blv. No:1, Ankara, 06800, Turkey
- METU MEMS Center, Mustafa Kemal Mah, Dumlupınar Bulvarı No: 280, Ankara, 06350, Turkey
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7
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Bedir T, Baykara D, Yildirim R, Calikoglu Koyuncu AC, Sahin A, Kaya E, Tinaz GB, Insel MA, Topuzogulları M, Gunduz O, Ustundag CB, Narayan R. Three-Dimensional-Printed GelMA-KerMA Composite Patches as an Innovative Platform for Potential Tissue Engineering of Tympanic Membrane Perforations. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:563. [PMID: 38607098 PMCID: PMC11013928 DOI: 10.3390/nano14070563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 03/10/2024] [Accepted: 03/21/2024] [Indexed: 04/13/2024]
Abstract
Tympanic membrane (TM) perforations, primarily induced by middle ear infections, the introduction of foreign objects into the ear, and acoustic trauma, lead to hearing abnormalities and ear infections. We describe the design and fabrication of a novel composite patch containing photocrosslinkable gelatin methacryloyl (GelMA) and keratin methacryloyl (KerMA) hydrogels. GelMA-KerMA patches containing conical microneedles in their design were developed using the digital light processing (DLP) 3D printing approach. Following this, the patches were biofunctionalized by applying a coaxial coating with PVA nanoparticles loaded with gentamicin (GEN) and fibroblast growth factor (FGF-2) with the Electrohydrodynamic Atomization (EHDA) method. The developed nanoparticle-coated 3D-printed patches were evaluated in terms of their chemical, morphological, mechanical, swelling, and degradation behavior. In addition, the GEN and FGF-2 release profiles, antimicrobial properties, and biocompatibility of the patches were examined in vitro. The morphological assessment verified the successful fabrication and nanoparticle coating of the 3D-printed GelMA-KerMA patches. The outcomes of antibacterial tests demonstrated that GEN@PVA/GelMA-KerMA patches exhibited substantial antibacterial efficacy against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. Furthermore, cell culture studies revealed that GelMA-KerMA patches were biocompatible with human adipose-derived mesenchymal stem cells (hADMSC) and supported cell attachment and proliferation without any cytotoxicity. These findings indicated that biofunctional 3D-printed GelMA-KerMA patches have the potential to be a promising therapeutic approach for addressing TM perforations.
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Affiliation(s)
- Tuba Bedir
- Center for Nanotechnology and Biomaterials Application and Research (NBUAM), Marmara University, Istanbul 34722, Turkey; (T.B.); (D.B.); (A.C.C.K.); (O.G.)
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey
| | - Dilruba Baykara
- Center for Nanotechnology and Biomaterials Application and Research (NBUAM), Marmara University, Istanbul 34722, Turkey; (T.B.); (D.B.); (A.C.C.K.); (O.G.)
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey
| | - Ridvan Yildirim
- Center for Nanotechnology and Biomaterials Application and Research (NBUAM), Marmara University, Istanbul 34722, Turkey; (T.B.); (D.B.); (A.C.C.K.); (O.G.)
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey
| | - Ayse Ceren Calikoglu Koyuncu
- Center for Nanotechnology and Biomaterials Application and Research (NBUAM), Marmara University, Istanbul 34722, Turkey; (T.B.); (D.B.); (A.C.C.K.); (O.G.)
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey
| | - Ali Sahin
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul 34722, Turkey;
| | - Elif Kaya
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Marmara University, Istanbul 34668, Turkey; (E.K.); (G.B.T.)
| | - Gulgun Bosgelmez Tinaz
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Marmara University, Istanbul 34668, Turkey; (E.K.); (G.B.T.)
| | - Mert Akin Insel
- Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul 34210, Turkey;
| | - Murat Topuzogulları
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul 34210, Turkey;
| | - Oguzhan Gunduz
- Center for Nanotechnology and Biomaterials Application and Research (NBUAM), Marmara University, Istanbul 34722, Turkey; (T.B.); (D.B.); (A.C.C.K.); (O.G.)
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey
- Health Biotechnology Joint Research and Application Center of Excellence, Istanbul 34220, Turkey
| | - Cem Bulent Ustundag
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul 34210, Turkey;
- Health Biotechnology Joint Research and Application Center of Excellence, Istanbul 34220, Turkey
| | - Roger Narayan
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA
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Morgenstern J, Kreusch T, Golde J, Steuer S, Ossmann S, Kirsten L, Walther J, Zahnert T, Koch E, Neudert M. In Vivo Thickness of the Healthy Tympanic Membrane Determined by Optical Coherence Tomography. Otol Neurotol 2024; 45:e256-e262. [PMID: 38361307 DOI: 10.1097/mao.0000000000004132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
OBJECTIVE Tympanic membrane (TM) thickness is an important parameter for differentiation between a healthy and a pathologic TM. Furthermore, it is needed for modeling the middle ear function. Endoscopic optical coherence tomography (eOCT) provides the opportunity to measure the TM thickness of the entire TM in vivo. MATERIALS AND METHODS A total of 27 healthy ears were examined by eOCT. The system uses a light source with a central wavelength of 1,300 nm. The endoscope with an outer diameter of 3.5 mm provides a field of view of 10 mm and a working distance of 10 mm. Thickness measurements were carried out at 8 points on the TM. Additionally, the existing literature was analyzed, and a mean TM thickness value was determined. RESULTS The mean thickness of the TM over all measurement points of the pars tensa was 120.2 μm, and the pars flaccida was significantly thicker with a mean thickness of 177.9 μm. Beyond that, there were no significant differences between the single quadrants. The mean TM thickness in the literature was 88.8 μm. DISCUSSION EOCT provides the possibility for in vivo thickness determination of the TM. The mean thickness seems to be higher than in the previous studies, which were mostly carried out ex vivo. Our study takes the three-dimensional refraction into account and provides a method for the refraction correction.
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Affiliation(s)
- Joseph Morgenstern
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Theodor Kreusch
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | | | - Svea Steuer
- Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Steffen Ossmann
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | | | - Julia Walther
- Department of Medical Physics and Biomedical Engineering, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Thomas Zahnert
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Edmund Koch
- Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
| | - Marcus Neudert
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Fetscherstraße 74, 01307 Dresden, Germany
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9
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von Witzleben M, Hahn J, Richter RF, de Freitas B, Steyer E, Schütz K, Vater C, Bernhardt A, Elschner C, Gelinsky M. Tailoring the pore design of embroidered structures by melt electrowriting to enhance the cell alignment in scaffold-based tendon reconstruction. BIOMATERIALS ADVANCES 2024; 156:213708. [PMID: 38029698 DOI: 10.1016/j.bioadv.2023.213708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 12/01/2023]
Abstract
Tissue engineering of ligaments and tendons aims to reproduce the complex and hierarchical tissue structure while meeting the biomechanical and biological requirements. For the first time, the additive manufacturing methods of embroidery technology and melt electrowriting (MEW) were combined to mimic these properties closely. The mechanical benefits of embroidered structures were paired with a superficial micro-scale structure to provide a guide pattern for directional cell growth. An evaluation of several previously reported MEW fiber architectures was performed. The designs with the highest cell orientation of primary dermal fibroblasts were then applied to embroidery structures and subsequently evaluated using human adipose-derived stem cells (AT-MSC). The addition of MEW fibers resulted in the formation of a mechanically robust layer on the embroidered scaffolds, leading to composite structures with mechanical properties comparable to those of the anterior cruciate ligament. Furthermore, the combination of embroidered and MEW structures supports a higher cell orientation of AT-MSC compared to embroidered structures alone. Collagen coating further promoted cell attachment. Thus, these investigations provide a sound basis for the fabrication of heterogeneous and hierarchical synthetic tendon and ligament substitutes.
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Affiliation(s)
- Max von Witzleben
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Judith Hahn
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Institute of Polymer Materials, Hohe Str. 6, 01069 Dresden, Germany
| | - Ron F Richter
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Bianca de Freitas
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Emily Steyer
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Kathleen Schütz
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Corina Vater
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Anne Bernhardt
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Cindy Elschner
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Institute of Polymer Materials, Hohe Str. 6, 01069 Dresden, Germany
| | - Michael Gelinsky
- Technische Universität Dresden, University Hospital Carl Gustav Carus and Faculty of Medicine, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany.
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10
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Steuer S, Morgenstern J, Kirsten L, Bornitz M, Neudert M, Koch E, Golde J. In vivo microstructural investigation of the human tympanic membrane by endoscopic polarization-sensitive optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2023; 28:121203. [PMID: 37007626 PMCID: PMC10050973 DOI: 10.1117/1.jbo.28.12.121203] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/27/2023] [Indexed: 06/19/2023]
Abstract
SIGNIFICANCE Endoscopic optical coherence tomography (OCT) is of growing interest for in vivo diagnostics of the tympanic membrane (TM) and the middle ear but generally lacks a tissue-specific contrast. AIM To assess the collagen fiber layer within the in vivo TM, an endoscopic imaging method utilizing the polarization changes induced by the birefringent connective tissue was developed. APPROACH An endoscopic swept-source OCT setup was redesigned and extended by a polarization-diverse balanced detection unit. Polarization-sensitive OCT (PS-OCT) data were visualized by a differential Stokes-based processing and the derived local retardation. The left and right ears of a healthy volunteer were examined. RESULTS Distinct retardation signals in the annulus region of the TM and near the umbo revealed the layered structure of the TM. Due to the TM's conical shape and orientation in the ear canal, high incident angles onto the TM's surface, and low thicknesses compared to the axial resolution limit of the system, other regions of the TM were more difficult to evaluate. CONCLUSIONS The use of endoscopic PS-OCT is feasible to differentiate birefringent and nonbirefringent tissue of the human TM in vivo. Further investigations on healthy as well as pathologically altered TMs are required to validate the diagnostic potential of this technique.
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Affiliation(s)
- Svea Steuer
- TU Dresden, Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Dresden, Germany
- TU Dresden, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Dresden, Germany
| | - Joseph Morgenstern
- TU Dresden, Otorhinolaryngology, Ear Research Center Dresden, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
| | - Lars Kirsten
- TU Dresden, Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Dresden, Germany
| | - Matthias Bornitz
- TU Dresden, Otorhinolaryngology, Ear Research Center Dresden, Faculty of Medicine, Dresden, Germany
| | - Marcus Neudert
- TU Dresden, Otorhinolaryngology, Ear Research Center Dresden, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
| | - Edmund Koch
- TU Dresden, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
| | - Jonas Golde
- TU Dresden, Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Dresden, Germany
- TU Dresden, Else Kröner-Fresenius Center for Digital Health, Dresden, Germany
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11
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von Witzleben M, Stoppe T, Zeinalova A, Chen Z, Ahlfeld T, Bornitz M, Bernhardt A, Neudert M, Gelinsky M. Multimodal additive manufacturing of biomimetic tympanic membrane replacements with near tissue-like acousto-mechanical and biological properties. Acta Biomater 2023; 170:124-141. [PMID: 37696412 DOI: 10.1016/j.actbio.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/08/2023] [Accepted: 09/05/2023] [Indexed: 09/13/2023]
Abstract
The three additive manufacturing techniques fused deposition modeling, gel plotting and melt electrowriting were combined to develop a mimicry of the tympanic membrane (TM) to tackle large TM perforations caused by chronic otitis media. The mimicry of the collagen fiber orientation of the TM was accompanied by a study of multiple funnel-shaped mimics of the TM morphology, resulting in mechanical and acoustic properties similar to those of the eardrum. For the different 3D printing techniques used, the process parameters were optimized to allow reasonable microfiber arrangements within the melt electrowriting setup. Interestingly, the fiber pattern was less important for the acousto-mechanical properties than the overall morphology. Furthermore, the behavior of keratinocytes and fibroblasts is crucial for the repair of the TM, and an in vitro study showed a high biocompatibility of both primary cell types while mimicking the respective cell layers of the TM. A simulation of the in vivo ingrowth of both cell types resulted in a cell growth orientation similar to the original collagen fiber orientation of the TM. Overall, the combined approach showed all the necessary parameters to support the growth of a neo-epithelial layer with a similar structure and morphology to the original membrane. It therefore offers a suitable alternative to autologous materials for the treatment of chronic otitis media. STATEMENT OF SIGNIFICANCE: Millions of people worldwide suffer from chronic middle ear infections. Although the tympanic membrane (TM) can be reconstructed with autologous materials, the grafts used for this purpose require extensive manual preparation during surgery. This affects not only the hearing ability but also the stability of the reconstructed TM, especially in the case of full TM reconstruction. The synthetic alternative presented here mimicked not only the fibrous structure of the TM but also its morphology, resulting in similar acousto-mechanical properties. Furthermore, its high biocompatibility supported the migration of keratinocytes and fibroblasts to form a neo-epithelial layer. Overall, this completely new TM replacement was achieved by combining three different additive manufacturing processes.
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Affiliation(s)
- Max von Witzleben
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Dresden, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Thomas Stoppe
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden (ERCD), Fetscherstr. 74, 01307 Dresden, Germany
| | - Alina Zeinalova
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Dresden, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Zhaoyu Chen
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden (ERCD), Fetscherstr. 74, 01307 Dresden, Germany
| | - Tilman Ahlfeld
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Dresden, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Matthias Bornitz
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden (ERCD), Fetscherstr. 74, 01307 Dresden, Germany
| | - Anne Bernhardt
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Dresden, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany
| | - Marcus Neudert
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden (ERCD), Fetscherstr. 74, 01307 Dresden, Germany
| | - Michael Gelinsky
- Technische Universität Dresden, Faculty of Medicine Carl Gustav Dresden, Centre for Translational Bone, Joint and Soft Tissue Research, Fetscherstr. 74, 01307 Dresden, Germany.
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12
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Chitin nanofibrils modulate mechanical response in tympanic membrane replacements. Carbohydr Polym 2023; 310:120732. [PMID: 36925264 DOI: 10.1016/j.carbpol.2023.120732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 02/02/2023] [Accepted: 02/18/2023] [Indexed: 02/25/2023]
Abstract
The tympanic membrane (TM), is a thin tissue lying at the intersection of the outer and the middle ear. TM perforations caused by traumas and infections often result in a conductive hearing loss. Tissue engineering has emerged as a promising approach for reconstructing the damaged TM by replicating the native material characteristics. In this regard, chitin nanofibrils (CN), a polysaccharide-derived nanomaterial, is known to exhibit excellent biocompatibility, immunomodulation and antimicrobial activity, thereby imparting essential qualities for an optimal TM regeneration. This work investigates the application of CN as a nanofiller for poly(ethylene oxide terephthalate)/poly(butylene terephthalate) (PEOT/PBT) copolymer to manufacture clinically suitable TM scaffolds using electrospinning and fused deposition modelling. The inclusion of CN within the PEOT/PBT matrix showed a three-fold reduction in the corresponding electrospun fiber diameters and demonstrated a significant improvement in the mechanical properties required for TM repair. Furthermore, in vitro biodegradation assay highlighted a favorable influence of CN in accelerating the scaffold degradation over a period of one year. Finally, the oto- and cytocompatibility response of the nanocomposite substrates corroborated their biological relevance for the reconstruction of perforated eardrums.
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13
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Javadzadeh M, Del Barrio J, Sánchez-Somolinos C. Melt Electrowriting of Liquid Crystal Elastomer Scaffolds with Programmed Mechanical Response. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209244. [PMID: 36459991 DOI: 10.1002/adma.202209244] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Recently, significant advances have been achieved to precisely program the response of liquid crystal elastomers (LCEs) through extrusion-based additive manufacturing techniques; however, important challenges remain, especially when well-defined scaffolds based on ultrafine fibers are required. Here the melt electrowriting of reactive liquid crystalline inks, leading, after ultraviolet-light-induced crosslinking, to digitally positioned uniform LCE fibers with diameters ranging from hundreds of nanometers to tens of micrometers is presented, which is hardly accessible with conventional extrusion-based printing techniques. The electrowriting process induces the preferential alignment of the mesogens parallel to the fiber's axis. Such an alignment, defined by the printing path, determines the mechanical response of the crosslinked material upon stimulation. This manufacturing platform allows the preparation of open square lattice scaffolds with ultrafine fibers (a few micrometers in diameter), periods as small as 90 µm, and well-defined morphology. Additionally, the combination of accurate fiber stacking (up to 50 layers) and fiber fusion between layers leads to unprecedented microstructures composed of high-aspect-ratio LCE thin walls. The possibility of digitally controlling the printing of fibers allows the preparation complex fiber-based scaffolds with programmed and reversible shape-morphing, thus opening new avenues to prepare miniaturized actuators and smart structures for soft robotics and biomedical applications.
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Affiliation(s)
- Mehrzad Javadzadeh
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, Zaragoza, 50009, Spain
| | - Jesús Del Barrio
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Química Orgánica, Zaragoza, 50009, Spain
| | - Carlos Sánchez-Somolinos
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, Zaragoza, 50009, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Zaragoza, 50018, Spain
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14
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3D printing of bio-instructive materials: Toward directing the cell. Bioact Mater 2023; 19:292-327. [PMID: 35574057 PMCID: PMC9058956 DOI: 10.1016/j.bioactmat.2022.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/25/2022] [Accepted: 04/10/2022] [Indexed: 01/10/2023] Open
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15
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Włodarczyk-Biegun MK, Villiou M, Koch M, Muth C, Wang P, Ott J, Del Campo A. Melt Electrowriting of Graded Porous Scaffolds to Mimic the Matrix Structure of the Human Trabecular Meshwork. ACS Biomater Sci Eng 2022; 8:3899-3911. [PMID: 35984428 PMCID: PMC9472227 DOI: 10.1021/acsbiomaterials.2c00623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The permeability of the human trabecular meshwork (HTM)
regulates
eye pressure via a porosity gradient across its thickness modulated
by stacked layers of matrix fibrils and cells. Changes in HTM porosity
are associated with increases in intraocular pressure and the progress
of diseases such as glaucoma. Engineered HTMs could help to understand
the structure–function relation in natural tissues and lead
to new regenerative solutions. Here, melt electrowriting (MEW) is
explored as a biofabrication technique to produce fibrillar, porous
scaffolds that mimic the multilayer, gradient structure of native
HTM. Poly(caprolactone) constructs with a height of 125–500
μm and fiber diameters of 10–12 μm are printed.
Scaffolds with a tensile modulus between 5.6 and 13 MPa and a static
compression modulus in the range of 6–360 kPa are obtained
by varying the scaffold design, that is, the density and orientation
of the fibers and number of stacked layers. Primary HTM cells attach
to the scaffolds, proliferate, and form a confluent layer within 8–14
days, depending on the scaffold design. High cell viability and cell
morphology close to that in the native tissue are observed. The present
work demonstrates the utility of MEW for reconstructing complex morphological
features of natural tissues.
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Affiliation(s)
| | - Maria Villiou
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.,Chemistry Department, Saarland University, 66123 Saarbrücken, Germany
| | - Marcus Koch
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Christina Muth
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Peixi Wang
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.,Chemistry Department, Saarland University, 66123 Saarbrücken, Germany
| | - Jenna Ott
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Aranzazu Del Campo
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.,Chemistry Department, Saarland University, 66123 Saarbrücken, Germany
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16
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3D Plotting of Calcium Phosphate Cement and Melt Electrowriting of Polycaprolactone Microfibers in One Scaffold: A Hybrid Additive Manufacturing Process. J Funct Biomater 2022; 13:jfb13020075. [PMID: 35735931 PMCID: PMC9225379 DOI: 10.3390/jfb13020075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/31/2022] [Accepted: 06/05/2022] [Indexed: 11/17/2022] Open
Abstract
The fabrication of patient-specific scaffolds for bone substitutes is possible through extrusion-based 3D printing of calcium phosphate cements (CPC) which allows the generation of structures with a high degree of customization and interconnected porosity. Given the brittleness of this clinically approved material, the stability of open-porous scaffolds cannot always be secured. Herein, a multi-technological approach allowed the simultaneous combination of CPC printing with melt electrowriting (MEW) of polycaprolactone (PCL) microfibers in an alternating, tunable design in one automated fabrication process. The hybrid CPC+PCL scaffolds with varying CPC strand distance (800-2000 µm) and integrated PCL fibers featured a strong CPC to PCL interface. While no adverse effect on mechanical stiffness was detected by the PCL-supported scaffold design; the microfiber integration led to an improved integrity. The pore distance between CPC strands was gradually increased to identify at which critical CPC porosity the microfibers would have a significant impact on pore bridging behavior and growth of seeded cells. At a CPC strand distance of 1600 µm, after 2 weeks of cultivation, the incorporation of PCL fibers led to pore coverage by a human mesenchymal stem cell line and an elevated proliferation level of murine pre-osteoblasts. The integrated fabrication approach allows versatile design adjustments on different levels.
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17
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Benecke L, Chen Z, Zeidler-Rentzsch I, von Witzleben M, Bornitz M, Zahnert T, Neudert M, Cherif C, Aibibu D. Development of electrospun, biomimetic tympanic membrane implants with tunable mechanical and oscillatory properties for myringoplasty. Biomater Sci 2022; 10:2287-2301. [PMID: 35363238 DOI: 10.1039/d1bm01815a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Most commonly, autologous grafts are used in tympanic membrane (TM) reconstruction. However, apart from the limited availability and the increased surgical risk, they cannot replicate the full functionality of the human TM properly. Hence, biomimetic synthetic TM implants have been developed in our project to overcome these drawbacks. These innovative TM implants are made from synthetic biopolymer polycaprolactone (PCL) and silk fibroin (SF) by electrospinning technology. Static and dynamic experiments have shown that the mechanical and oscillatory behavior of the TM implants can be tuned by adjusting the solution concentration, the SF and PCL mixing ratio and the electrospinning parameters. In addition, candidates for TM implants could have comparable acousto-mechanical properties to human TMs. Finally, these candidates were further validated in in vitro experiments by performing TM reconstruction in human cadaver temporal bones. The reconstructed TM with SF-PCL blend membranes fully recovered the acoustic vibration when the perforation was smaller than 50%. Furthermore, the handling, medium adhesion and transparency of the developed TM implants were similar to those of human TMs.
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Affiliation(s)
- Lukas Benecke
- Technische Universität Dresden, Faculty of Mechanical Science and Engineering, Institute of Textile Machinery and High Performance Material Technology, Breitscheidstraße 78, 01237 Dresden, Germany.
| | - Zhaoyu Chen
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Ines Zeidler-Rentzsch
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Max von Witzleben
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Center for Translational Bone, Joint and Soft Tissue Research, Fetscherstraße 74, 01307 Dresden, Germany
| | - Matthias Bornitz
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Thomas Zahnert
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Marcus Neudert
- Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, Ear Research Center Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Chokri Cherif
- Technische Universität Dresden, Faculty of Mechanical Science and Engineering, Institute of Textile Machinery and High Performance Material Technology, Breitscheidstraße 78, 01237 Dresden, Germany.
| | - Dilbar Aibibu
- Technische Universität Dresden, Faculty of Mechanical Science and Engineering, Institute of Textile Machinery and High Performance Material Technology, Breitscheidstraße 78, 01237 Dresden, Germany.
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18
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Prasad SV, Piktel E, Depciuch J, Maximenko A, Suprewicz Ł, Daniluk T, Spałek J, Wnorowska U, M Zielinski P, Parlinska-Wojtan M, B Savage P, Okła S, Fiedoruk K, Bucki R. Targeting bacteria causing otitis media using nanosystems containing nonspherical gold nanoparticles and ceragenins. Nanomedicine (Lond) 2021; 16:2657-2678. [PMID: 34823374 DOI: 10.2217/nnm-2021-0370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Aim: To evaluate the antibacterial and antibiofilm activity of ceragenin-conjugated nonspherical gold nanoparticles against the most common agents of otitis media. Methods: Minimal inhibitory and bactericidal concentrations and colony-counting assays, as well as colorimetric and fluorimetric methods, were used to estimate the antibacterial activity of compounds in phosphate-buffered saline and human cerumen. The nanosystems' biocompatibility and ability to decrease IL-8 release was tested using keratinocyte cells. Results: The tested compounds demonstrated strong antimicrobial activity against planktonic and biofilm cultures at nontoxic doses due to the induction of oxidative stress followed by the damage of bacterial membranes. Conclusion: This study indicates that ceragenin-conjugated nonspherical gold nanoparticles have potential as new treatment methods for eradicating biofilm-forming pathogens associated with otitis media.
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Affiliation(s)
- Suhanya V Prasad
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
| | - Ewelina Piktel
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
| | - Joanna Depciuch
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342, Krakow, Poland
| | - Alexey Maximenko
- SOLARIS National Synchrotron Radiation Centre, Jagiellonian University, PL-30392, Krakow, Poland
| | - Łukasz Suprewicz
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
| | - Tamara Daniluk
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
| | - Jakub Spałek
- Department of Pathology, Collegium Medicum, Jan Kochanowski University in Kielce, PL-25317, Kielce, Poland.,Department of Otolaryngology, Head & Neck Surgery, Holy Cross Cancer Center in Kielce, PL-25734, Kielce, Poland
| | - Urszula Wnorowska
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
| | - Piotr M Zielinski
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342, Krakow, Poland
| | | | - Paul B Savage
- Department of Chemistry & Biochemistry, Brigham Young University, Provo, UT 84604, USA
| | - Sławomir Okła
- Department of Otolaryngology, Head & Neck Surgery, Holy Cross Cancer Center in Kielce, PL-25734, Kielce, Poland
| | - Krzysztof Fiedoruk
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
| | - Robert Bucki
- Department of Medical Microbiology & Nanobiomedical Engineering, Medical University of Bialystok, PL-15222, Bialystok, Poland
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19
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Anand S, Stoppe T, Lucena M, Rademakers T, Neudert M, Danti S, Moroni L, Mota C. Mimicking the Human Tympanic Membrane: The Significance of Scaffold Geometry. Adv Healthc Mater 2021; 10:e2002082. [PMID: 33945239 DOI: 10.1002/adhm.202002082] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/27/2021] [Indexed: 12/25/2022]
Abstract
The human tympanic membrane (TM) captures sound waves from the environment and transforms them into mechanical motion. The successful transmission of these acoustic vibrations is attributed to the unique architecture of the TM. However, a limited knowledge is available on the contribution of its discrete anatomical features, which is important for fabricating functional TM replacements. This work synergizes theoretical and experimental approaches toward understanding the significance of geometry in tissue-engineered TM scaffolds. Three test designs along with a plain control are chosen to decouple some of the dominant structural elements, such as the radial and circumferential alignment of the collagen fibrils. In silico models suggest a geometrical dependency of their mechanical and acoustical responses, where the presence of radially aligned fibers is observed to have a more prominent effect compared to their circumferential counterparts. Following which, a hybrid fabrication strategy combining electrospinning and additive manufacturing has been optimized to manufacture biomimetic scaffolds within the dimensions of the native TM. The experimental characterizations conducted using macroindentation and laser Doppler vibrometry corroborate the computational findings. Finally, biological studies with human dermal fibroblasts and human mesenchymal stromal cells reveal a favorable influence of scaffold hierarchy on cellular alignment and subsequent collagen deposition.
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Affiliation(s)
- Shivesh Anand
- Department of Complex Tissue Regeneration MERLN Institute for Technology‐Inspired Regenerative Medicine Maastricht University Maastricht 6229 ER The Netherlands
| | - Thomas Stoppe
- Ear Research Center Dresden Department of Otorhinolaryngology Head and Neck Surgery Carl Gustav Carus Faculty of Medicine Technische Universität Dresden Dresden 01307 Germany
| | - Mónica Lucena
- Department of Complex Tissue Regeneration MERLN Institute for Technology‐Inspired Regenerative Medicine Maastricht University Maastricht 6229 ER The Netherlands
| | - Timo Rademakers
- Department of Complex Tissue Regeneration MERLN Institute for Technology‐Inspired Regenerative Medicine Maastricht University Maastricht 6229 ER The Netherlands
| | - Marcus Neudert
- Ear Research Center Dresden Department of Otorhinolaryngology Head and Neck Surgery Carl Gustav Carus Faculty of Medicine Technische Universität Dresden Dresden 01307 Germany
| | - Serena Danti
- Department of Civil and Industrial Engineering University of Pisa Pisa 56122 Italy
| | - Lorenzo Moroni
- Department of Complex Tissue Regeneration MERLN Institute for Technology‐Inspired Regenerative Medicine Maastricht University Maastricht 6229 ER The Netherlands
| | - Carlos Mota
- Department of Complex Tissue Regeneration MERLN Institute for Technology‐Inspired Regenerative Medicine Maastricht University Maastricht 6229 ER The Netherlands
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