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Tenio T, Boakye-Yiadom S. Characterization and selection of a skull surrogate for the development of a biofidelic head model. J Mech Behav Biomed Mater 2024; 158:106680. [PMID: 39153408 DOI: 10.1016/j.jmbbm.2024.106680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 07/30/2024] [Accepted: 08/05/2024] [Indexed: 08/19/2024]
Abstract
This research paper explores the advancement of physical models simulating the human skull-brain complex, focusing on applications in simulating mild Traumatic Brain Injury (mTBI). Existing models, especially head forms, lack biofidelity in accurately representing the native structures of the skull, limiting the understanding of intracranial injury parameters beyond kinematic head accelerations. This study addresses this gap by investigating the use of additive manufacturing (AM) techniques to develop biofidelic skull surrogates. Materials such as Polylactic Acid (PLA), a bone-simulant PLA variant, and Hydroxyapatite-coated Poly(methyl methacrylate) (PMMA) were used to create models tested for their flexural modulus and strength. The trabecular bone regions were simulated by adjusting infill densities (30%, 50%, 80%) and print raster directions, optimizing manufacturing parameters for biofidelic performance. Among the tested materials, PLA and its bone-simulating variant printed at 80% infill density with a side (tangential) print orientation demonstrated the closest approximation to the mechanical properties of cranial bone, yielding a mean flexural modulus of 1337.2 MPa and a mean ultimate strength of 56.9 MPa. Statistical analyses showed that infill density significantly influenced the moduli and strength of the printed simulants. Digital Image Correlation (DIC) corroborated the comparable performance of the simulants, showing similar strain and displacement behaviors to native skull bone. Notably, the performance of the manufactured cortical and trabecular regions underscored their crucial role in achieving biofidelity, with the trabecular structure providing critical dampening effects when the native bone is loaded. This study establishes PLA, particularly its bone-simulant variant, as an optimal candidate for cranial bone simulants, offering significant potential for developing more accurate biofidelic head models in mTBI research.
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Affiliation(s)
- Tristan Tenio
- Lassonde School of Engineering Mechanical Engineering Department , York University , Bergeron Building of Engineering Excellence , 11 Arboretum Lane, North York, ON, M3J2S5, Canada.
| | - Solomon Boakye-Yiadom
- Lassonde School of Engineering Mechanical Engineering Department , York University , Bergeron Building of Engineering Excellence , 11 Arboretum Lane, North York, ON, M3J2S5, Canada
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2
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Vidal-Flores LM, Reyes-Alberto M, Albor-Ramírez E, Domínguez-Velasco CF, Gutierrez-Herrera E, Padilla-Castañeda MA. Fabrication and Characterization of Brain Tissue Phantoms Using Agarose Gels for Ultraviolet Vision Systems. Gels 2024; 10:540. [PMID: 39195069 DOI: 10.3390/gels10080540] [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: 07/02/2024] [Revised: 08/17/2024] [Accepted: 08/17/2024] [Indexed: 08/29/2024] Open
Abstract
Recreating cerebral tissue using a tissue-mimicking phantom is valuable because it provides a tool for studying physiological and biological processes related to tissues without the necessity of performing the study directly in the tissue or even in a patient. The reproduction of the optical properties allows investigation in areas such as imaging, optics, and ultrasound, among others. This paper presents a methodology for manufacturing agarose-based phantoms that mimic the optical characteristics of brain tissue using scattering and absorbing agents and proposes combinations of these agents to recreate the healthy brain tissue optical coefficients within the wavelength range of 350 to 500 nm. The results of the characterization of the manufactured phantoms propose ideal combinations of the used materials for their use in controlled environment experiments in the UV range, following a cost-effective methodology.
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Affiliation(s)
- Luis M Vidal-Flores
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | - Miguel Reyes-Alberto
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | - Efraín Albor-Ramírez
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | - César F Domínguez-Velasco
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | | | - Miguel A Padilla-Castañeda
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
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3
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Yuan T, Zhan W, Terzano M, Holzapfel GA, Dini D. A comprehensive review on modeling aspects of infusion-based drug delivery in the brain. Acta Biomater 2024:S1742-7061(24)00387-8. [PMID: 39032668 DOI: 10.1016/j.actbio.2024.07.015] [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: 03/21/2024] [Revised: 07/10/2024] [Accepted: 07/11/2024] [Indexed: 07/23/2024]
Abstract
Brain disorders represent an ever-increasing health challenge worldwide. While conventional drug therapies are less effective due to the presence of the blood-brain barrier, infusion-based methods of drug delivery to the brain represent a promising option. Since these methods are mechanically controlled and involve multiple physical phases ranging from the neural and molecular scales to the brain scale, highly efficient and precise delivery procedures can significantly benefit from a comprehensive understanding of drug-brain and device-brain interactions. Behind these interactions are principles of biophysics and biomechanics that can be described and captured using mathematical models. Although biomechanics and biophysics have received considerable attention, a comprehensive mechanistic model for modeling infusion-based drug delivery in the brain has yet to be developed. Therefore, this article reviews the state-of-the-art mechanistic studies that can support the development of next-generation models for infusion-based brain drug delivery from the perspective of fluid mechanics, solid mechanics, and mathematical modeling. The supporting techniques and database are also summarized to provide further insights. Finally, the challenges are highlighted and perspectives on future research directions are provided. STATEMENT OF SIGNIFICANCE: Despite the immense potential of infusion-based drug delivery methods for bypassing the blood-brain barrier and efficiently delivering drugs to the brain, achieving optimal drug distribution remains a significant challenge. This is primarily due to our limited understanding of the complex interactions between drugs and the brain that are governed by principles of biophysics and biomechanics, and can be described using mathematical models. This article provides a comprehensive review of state-of-the-art mechanistic studies that can help to unravel the mechanism of drug transport in the brain across the scales, which underpins the development of next-generation models for infusion-based brain drug delivery. More broadly, this review will serve as a starting point for developing more effective treatments for brain diseases and mechanistic models that can be used to study other soft tissue and biomaterials.
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Affiliation(s)
- Tian Yuan
- Department of Mechanical Engineering, Imperial College London, SW7 2AZ, UK.
| | - Wenbo Zhan
- School of Engineering, University of Aberdeen, Aberdeen, AB24 3UE, UK
| | - Michele Terzano
- Institute of Biomechanics, Graz University of Technology, Austria
| | - Gerhard A Holzapfel
- Institute of Biomechanics, Graz University of Technology, Austria; Department of Structural Engineering, NTNU, Trondheim, Norway
| | - Daniele Dini
- Department of Mechanical Engineering, Imperial College London, SW7 2AZ, UK.
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4
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Băbuțan M, Botiz I. Morphological Characteristics of Biopolymer Thin Films Swollen-Rich in Solvent Vapors. Biomimetics (Basel) 2024; 9:396. [PMID: 39056837 PMCID: PMC11274445 DOI: 10.3390/biomimetics9070396] [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: 05/13/2024] [Revised: 06/21/2024] [Accepted: 06/29/2024] [Indexed: 07/28/2024] Open
Abstract
Biopolymers exhibit a large variety of attractive properties including biocompatibility, flexibility, gelation ability, and low cost. Therefore, especially in more recent years, they have become highly suitable for a wider and wider range of applications stretching across several key sectors such as those related to food packaging, pharmaceutic, and medical industries, just to name a few. Moreover, biopolymers' properties are known to be strongly dependent on the molecular arrangements adopted by such chains at the nanoscale and microscale. Fortunately, these arrangements can be altered and eventually optimized through a plethora of more or less efficient polymer processing methods. Here, we used a space-confined solvent vapor annealing (C-SVA) method to subject various biopolymers to rich swelling in solvent vapors in order to favor their further crystallization or self-assembly, with the final aim of obtaining thin biopolymer films exhibiting more ordered chain conformations. The results obtained by atomic force microscopy revealed that while the gelatin biopolymer nucleated and then crystallized into granular compact structures, other biopolymers preferred to self-assemble into (curved) lamellar rows composed of spherical nanoparticles (glycogen and chitosan) or into more complex helix-resembling morphologies (phytagel). The capability of the C-SVA processing method to favor crystallization and to induce self-assembly in various biopolymeric species or even monomeric units further emphasizes its great potential in the future structuring of a variety of biological (macro)molecules.
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Affiliation(s)
- Mihai Băbuțan
- Department of Physics of Condensed Matter and Advanced Technologies, Faculty of Physics, Babeș-Bolyai University, 400084 Cluj-Napoca, Romania;
| | - Ioan Botiz
- Department of Physics of Condensed Matter and Advanced Technologies, Faculty of Physics, Babeș-Bolyai University, 400084 Cluj-Napoca, Romania;
- Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, 400271 Cluj-Napoca, Romania
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5
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Dogan NO, Suadiye E, Wrede P, Lazovic J, Dayan CB, Soon RH, Aghakhani A, Richter G, Sitti M. Immune Cell-Based Microrobots for Remote Magnetic Actuation, Antitumor Activity, and Medical Imaging. Adv Healthc Mater 2024:e2400711. [PMID: 38885528 DOI: 10.1002/adhm.202400711] [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: 02/23/2024] [Revised: 05/17/2024] [Indexed: 06/20/2024]
Abstract
Translating medical microrobots into clinics requires tracking, localization, and performing assigned medical tasks at target locations, which can only happen when appropriate design, actuation mechanisms, and medical imaging systems are integrated into a single microrobot. Despite this, these parameters are not fully considered when designing macrophage-based microrobots. This study presents living macrophage-based microrobots that combine macrophages with magnetic Janus particles coated with FePt nanofilm for magnetic steering and medical imaging and bacterial lipopolysaccharides for stimulating macrophages in a tumor-killing state. The macrophage-based microrobots combine wireless magnetic actuation, tracking with medical imaging techniques, and antitumor abilities. These microrobots are imaged under magnetic resonance imaging and optoacoustic imaging in soft-tissue-mimicking phantoms and ex vivo conditions. Magnetic actuation and real-time imaging of microrobots are demonstrated under static and physiologically relevant flow conditions using optoacoustic imaging. Further, macrophage-based microrobots are magnetically steered toward urinary bladder tumor spheroids and imaged with a handheld optoacoustic device, where the microrobots significantly reduce the viability of tumor spheroids. The proposed approach demonstrates the proof-of-concept feasibility of integrating macrophage-based microrobots into clinic imaging modalities for cancer targeting and intervention, and can also be implemented for various other medical applications.
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Affiliation(s)
- Nihal Olcay Dogan
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
- Institute for Biomedical Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Eylül Suadiye
- Materials Central Scientific Facility, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Paul Wrede
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
- Institute for Biomedical Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Jelena Lazovic
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Cem Balda Dayan
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Ren Hao Soon
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
- Institute for Biomedical Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Amirreza Aghakhani
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
- Institute of Biomaterials and Biomolecular Systems, University of Stuttgart, 70569, Stuttgart, Germany
| | - Gunther Richter
- Materials Central Scientific Facility, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
| | - Metin Sitti
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569, Stuttgart, Germany
- Institute for Biomedical Engineering, ETH Zurich, Zurich, 8092, Switzerland
- School of Medicine and College of Engineering, Koç University, Istanbul, 34450, Turkey
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6
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Mishra A, Cleveland RO. Agarose as a Tissue Mimic for the Porcine Heart, Kidney, and Liver: Measurements and a Springpot Model. Bioengineering (Basel) 2024; 11:589. [PMID: 38927825 PMCID: PMC11200806 DOI: 10.3390/bioengineering11060589] [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: 04/11/2024] [Revised: 05/27/2024] [Accepted: 06/04/2024] [Indexed: 06/28/2024] Open
Abstract
Agarose gels are often used as a tissue mimic. The goal of this work was to determine the appropriate agarose concentrations that result in mechanical properties that match three different porcine organs. Strain tests were carried out with an amplitude varying from 0.01% to 10% at a frequency of 1 Hz on a range of agarose concentrations and porcine organs. Frequency sweep tests were performed from 0.1 Hz to a maximum of 9.5 Hz at a shear strain amplitude of 0.1% for agarose and porcine organs. In agarose samples, the effect of pre-compression of the samples up to 10% axial strain was considered during frequency sweep tests. The experimental measurements from agarose samples were fit to a fractional order viscoelastic (springpot) model. The model was then used to predict stress relaxation in response to a step strain of 0.1%. The prediction was compared to experimental relaxation data, and the results agreed within 12%. The agarose concentrations (by mass) that gave the best fit were 0.25% for the liver, 0.3% for the kidney, and 0.4% for the heart. At a frequency of 0.1 Hz and a shear strain of 0.1%, the agarose concentrations that best matched the shear storage modulus of the porcine organs were 0.4% agarose for the heart, 0.3% agarose for the kidney, and 0.25% agarose for the liver.
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Affiliation(s)
| | - Robin O. Cleveland
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK;
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7
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Son Y, Li P, Ortega D, Qiu H, Prachyl H, Yang M, Zhu W. Generation of a Human Induced Pluripotent Stem Cell Line Expressing a Magnetic Resonance Imaging Reporter Gene. SMALL METHODS 2024:e2301764. [PMID: 38708688 DOI: 10.1002/smtd.202301764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/09/2024] [Indexed: 05/07/2024]
Abstract
The objective of the current study is to develop a new method for tracking transplanted human induced pluripotent stem cells-derived cardiomyocytes (hiPSC-CMs) using magnetic resonance imaging (MRI). The CRISPR/dCas9 activation system is employed to overexpress ferritin heavy chain (FHC) in hiPSC-CMs. The mRNA and protein expression of FHC in hiPSC and hiPSC-CMs significantly increased after transfection. Iron chloride does not affect the cell viability in a concentration range from 0 to 2000 µm. hiPSCs overexpressing FHC (hiPSC- FHCOE) and hiPSC-CMs overexpressing FHC (hiPSC-CM-FHCOE) significantly enhanced cellular uptake of iron chloride but with no changes in electrophysiological properties compared to hiPSC-CM-Control. Furthermore, hiPSC-CM-FHCOE presented robust contrast and lower T2* values, signifying their potential as highly effective candidates for cardiac MRI. Next, hiPSC-CM-FHCOE is injected into mouse hearts and after 3 days of transplantation, MR images are obtained. hiPSC-CM-FHCOE cells exhibited clear signals in the hearts with lower T2* and rapid signal decay. Collectively, data from this proof-of-concept study demonstrated that endogenous labeling with FHC in hiPSC-CMs can be a potent strategy for enhancing the accuracy of cardiac MRI. This technology represents a significant step forward in tracking the transplanted hiPSC-CMs in the hearts of live animals.
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Affiliation(s)
- Yura Son
- Department of Cardiovascular Medicine, Department of Physiology and Biomedical Engineering, and Center for Regenerative Biotherapeutics, Mayo Clinic Arizona, Scottsdale, AZ, 85259, USA
| | - Pengsheng Li
- Department of Cardiovascular Medicine, Department of Physiology and Biomedical Engineering, and Center for Regenerative Biotherapeutics, Mayo Clinic Arizona, Scottsdale, AZ, 85259, USA
| | - Dakota Ortega
- KE Biosciences Preclinical Imaging Center, Arizona State University, Tempe, AZ, 85281, USA
| | - Huiliang Qiu
- Department of Cardiovascular Medicine, Department of Physiology and Biomedical Engineering, and Center for Regenerative Biotherapeutics, Mayo Clinic Arizona, Scottsdale, AZ, 85259, USA
| | - Hannah Prachyl
- Department of Cardiovascular Medicine, Department of Physiology and Biomedical Engineering, and Center for Regenerative Biotherapeutics, Mayo Clinic Arizona, Scottsdale, AZ, 85259, USA
| | - Ming Yang
- Department of Radiology, Mayo Clinic Arizona, Scottsdale, AZ, 85259, USA
| | - Wuqiang Zhu
- Department of Cardiovascular Medicine, Department of Physiology and Biomedical Engineering, and Center for Regenerative Biotherapeutics, Mayo Clinic Arizona, Scottsdale, AZ, 85259, USA
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8
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Galindo EJ, Flores RR, Mejia-Alvarez R, Willis AM, Tartis MS. Simultaneous High-Frame-Rate Acoustic Plane-Wave and Optical Imaging of Intracranial Cavitation in Polyacrylamide Brain Phantoms during Blunt Force Impact. Bioengineering (Basel) 2024; 11:132. [PMID: 38391618 DOI: 10.3390/bioengineering11020132] [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: 12/14/2023] [Revised: 01/20/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
Blunt and blast impacts occur in civilian and military personnel, resulting in traumatic brain injuries necessitating a complete understanding of damage mechanisms and protective equipment design. However, the inability to monitor in vivo brain deformation and potential harmful cavitation events during collisions limits the investigation of injury mechanisms. To study the cavitation potential, we developed a full-scale human head phantom with features that allow a direct optical and acoustic observation at high frame rates during blunt impacts. The phantom consists of a transparent polyacrylamide material sealed with fluid in a 3D-printed skull where windows are integrated for data acquisition. The model has similar mechanical properties to brain tissue and includes simplified yet key anatomical features. Optical imaging indicated reproducible cavitation events above a threshold impact energy and localized cavitation to the fluid of the central sulcus, which appeared as high-intensity regions in acoustic images. An acoustic spectral analysis detected cavitation as harmonic and broadband signals that were mapped onto a reconstructed acoustic frame. Small bubbles trapped during phantom fabrication resulted in cavitation artifacts, which remain the largest challenge of the study. Ultimately, acoustic imaging demonstrated the potential to be a stand-alone tool, allowing observations at depth, where optical techniques are limited.
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Affiliation(s)
- Eric J Galindo
- Department of Chemical Engineering, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
| | - Riley R Flores
- Department of Chemical Engineering, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
| | - Ricardo Mejia-Alvarez
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Adam M Willis
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USA
- 59th Medical Wing, Office of the Chief Scientist, Lackland AFB, San Antonio, TX 78236, USA
| | - Michaelann S Tartis
- Department of Chemical Engineering, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
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9
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Yuan Y, Tyson C, Szyniec A, Agro S, Tavakol TN, Harmon A, Lampkins D, Pearson L, Dumas JE, Taite LJ. Bioactive Polyurethane-Poly(ethylene Glycol) Diacrylate Hydrogels for Applications in Tissue Engineering. Gels 2024; 10:108. [PMID: 38391438 PMCID: PMC10887679 DOI: 10.3390/gels10020108] [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: 12/29/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024] Open
Abstract
Polyurethanes (PUs) are a highly adaptable class of biomaterials that are among some of the most researched materials for various biomedical applications. However, engineered tissue scaffolds composed of PU have not found their way into clinical application, mainly due to the difficulty of balancing the control of material properties with the desired cellular response. A simple method for the synthesis of tunable bioactive poly(ethylene glycol) diacrylate (PEGDA) hydrogels containing photocurable PU is described. These hydrogels may be modified with PEGylated peptides or proteins to impart variable biological functions, and the mechanical properties of the hydrogels can be tuned based on the ratios of PU and PEGDA. Studies with human cells revealed that PU-PEG blended hydrogels support cell adhesion and viability when cell adhesion peptides are crosslinked within the hydrogel matrix. These hydrogels represent a unique and highly tailorable system for synthesizing PU-based synthetic extracellular matrices for tissue engineering applications.
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Affiliation(s)
- Yixuan Yuan
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Caleb Tyson
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - Annika Szyniec
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Samuel Agro
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Tara N Tavakol
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Alexander Harmon
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - DessaRae Lampkins
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - Lauran Pearson
- Department of Chemical Engineering, Hampton University, Hampton, VA 23668, USA
| | - Jerald E Dumas
- Joint School of Nanoscience and Nanoengineering, North Carolina Agricultural & Technical State University, Greensboro, NC 27401, USA
| | - Lakeshia J Taite
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22903, USA
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10
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Valls-Esteve A, Tejo-Otero A, Adell-Gómez N, Lustig-Gainza P, Fenollosa-Artés F, Buj-Corral I, Rubio-Palau J, Munuera J, Krauel L. Advanced Strategies for the Fabrication of Multi-Material Anatomical Models of Complex Pediatric Oncologic Cases. Bioengineering (Basel) 2023; 11:31. [PMID: 38247908 PMCID: PMC10813349 DOI: 10.3390/bioengineering11010031] [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: 10/16/2023] [Revised: 12/01/2023] [Accepted: 12/06/2023] [Indexed: 01/23/2024] Open
Abstract
The printing and manufacturing of anatomical 3D models has gained popularity in complex surgical cases for surgical planning, simulation and training, the evaluation of anatomical relations, medical device testing and patient-professional communication. 3D models provide the haptic feedback that Virtual or Augmented Reality (VR/AR) cannot provide. However, there are many technologies and strategies for the production of 3D models. Therefore, the aim of the present study is to show and compare eight different strategies for the manufacture of surgical planning and training prototypes. The eight strategies for creating complex abdominal oncological anatomical models, based on eight common pediatric oncological cases, were developed using four common technologies (stereolithography (SLA), selectie laser sinterning (SLS), fused filament fabrication (FFF) and material jetting (MJ)) along with indirect and hybrid 3D printing methods. Nine materials were selected for their properties, with the final models assessed for application suitability, production time, viscoelastic mechanical properties (shore hardness and elastic modulus) and cost. The manufacturing and post-processing of each strategy is assessed, with times ranging from 12 h (FFF) to 61 h (hybridization of FFF and SLS), as labor times differ significantly. Cost per model variation is also significant, ranging from EUR 80 (FFF) to EUR 600 (MJ). The main limitation is the mimicry of physiological properties. Viscoelastic properties and the combination of materials, colors and textures are also substantially different according to the strategy and the intended use. It was concluded that MJ is the best overall option, although its use in hospitals is limited due to its cost. Consequently, indirect 3D printing could be a solid and cheaper alternative.
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Affiliation(s)
- Arnau Valls-Esteve
- Innovation Department, SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08007 Barcelona, Spain
- 3D Unit (3D4H), SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
| | - Aitor Tejo-Otero
- Centre CIM, Universitat Politècnica de Catalunya (CIM UPC), Carrer de Llorens i Artigas, 12, 08028 Barcelona, Spain
| | - Núria Adell-Gómez
- Innovation Department, SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
- 3D Unit (3D4H), SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
| | - Pamela Lustig-Gainza
- Innovation Department, SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
- 3D Unit (3D4H), SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
| | - Felip Fenollosa-Artés
- Centre CIM, Universitat Politècnica de Catalunya (CIM UPC), Carrer de Llorens i Artigas, 12, 08028 Barcelona, Spain
- Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya, Av. Diagonal, 647, 08028 Barcelona, Spain
| | - Irene Buj-Corral
- Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya, Av. Diagonal, 647, 08028 Barcelona, Spain
| | - Josep Rubio-Palau
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08007 Barcelona, Spain
- 3D Unit (3D4H), SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
- Pediatric Surgical Oncology, Pediatric Surgery Department, SJD Barcelona Children’s Hospital, Universitat de Barcelona, 08950 Barcelona, Spain
- Maxillofacial Unit, Department of Pediatric Surgery, Pediatric Surgical Oncology, SJD Barcelona Children’s Hospital, Universitat de Barcelona, 08950 Barcelona, Spain
| | - Josep Munuera
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08007 Barcelona, Spain
- Diagnostic Imaging Department, Hospital de la Santa Creu i Sant Pau, 08027 Barcelona, Spain
- Advanced Medical Imaging, Artificial Intelligence, and Imaging-Guided Therapy Research Group, Institut de Recerca Sant Pau—Centre CERCA, 08041 Barcelona, Spain
| | - Lucas Krauel
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08007 Barcelona, Spain
- 3D Unit (3D4H), SJD Barcelona Children’s Hospital, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
- Pediatric Surgical Oncology, Pediatric Surgery Department, SJD Barcelona Children’s Hospital, Universitat de Barcelona, 08950 Barcelona, Spain
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11
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Kwon Y, Singh S, Rodriguez D, Chau AL, Pitenis AA, De Tomaso AW, Valentine MT. Mechanical resilience of the sessile tunicate Botryllus schlosseri. J Exp Biol 2023; 226:jeb245124. [PMID: 37929758 PMCID: PMC10753489 DOI: 10.1242/jeb.245124] [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: 09/28/2022] [Accepted: 10/23/2023] [Indexed: 11/07/2023]
Abstract
We demonstrate that the sessile tunicate Botryllus schlosseri is remarkably resilient to applied loads by attaching the animals to an extensile substrate subjected to quasistatic equiradial loads. Animals can withstand radial extension of the substrate to strain values as high as 20% before they spontaneously detach. In the small to moderate strain regime, we found no relationship between the dynamic size of the external vascular bed and the magnitude of applied stretch, despite known force sensitivities of the vascular tissue at the cellular level. We attribute this resilience to the presence and mechanical properties of the tunic, the cellulose-enriched gel-like substance that encases the animal bodies and surrounding vasculature.
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Affiliation(s)
- Younghoon Kwon
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
| | - Shambhavi Singh
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
| | - Delany Rodriguez
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
| | - Allison L. Chau
- Materials Department, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
| | - Angela A. Pitenis
- Materials Department, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
| | - Anthony W. De Tomaso
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
| | - Megan T. Valentine
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93117, USA
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12
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Albor-Ramírez E, Reyes-Alberto M, Vidal-Flores LM, Gutierrez-Herrera E, Padilla-Castañeda MA. Agarose Gel Characterization for the Fabrication of Brain Tissue Phantoms for Infrared Multispectral Vision Systems. Gels 2023; 9:944. [PMID: 38131930 PMCID: PMC10742522 DOI: 10.3390/gels9120944] [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: 10/28/2023] [Revised: 11/20/2023] [Accepted: 11/24/2023] [Indexed: 12/23/2023] Open
Abstract
Synthetic phantoms that recreate the characteristics of biological tissues are valuable tools for systematically studying and comprehending physiologies, pathologies, and biological processes related to tissues. The reproduction of mechanical and optical properties allows for the development and evaluation of novel systems and applications in areas such as imaging, optics, ultrasound, or dosimetry, among others. This paper proposes a methodology for manufacturing agarose-based phantoms that mimics the optical properties of healthy brain tissue within the wavelength infrared range of 800 to 820 nm. The fabrication of such phantoms enables the possibility of testing and experimentation in controlled and safe environments toward the design of new near-infrared multispectral imaging systems in neurosurgery. The results of an experimental optical characterization study indicate the validity and reliability of the proposed method for fabricating brain tissue phantoms in a cost-effective and straightforward fashion.
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Affiliation(s)
| | - Miguel Reyes-Alberto
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico; (E.A.-R.); (L.M.V.-F.); (E.G.-H.)
| | | | | | - Miguel A. Padilla-Castañeda
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico; (E.A.-R.); (L.M.V.-F.); (E.G.-H.)
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13
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Forcier RJ, Heussner RT, Newsom L, Giers MB, Al Rawashdeh W, Buchanan KA, Woods EJ, Johnstone BH, Higgins AZ. Accelerating cryoprotectant delivery using vacuum infiltration. Cryobiology 2023; 112:104558. [PMID: 37451668 PMCID: PMC10530370 DOI: 10.1016/j.cryobiol.2023.104558] [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: 03/09/2023] [Revised: 06/22/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
The ability to cryopreserve bone marrow within the vertebral body (VB) would offer significant clinical and research benefits. However, cryopreservation of large structures, such as VBs, is challenging due to mass transport limitations that prevent the effective delivery of cryoprotectants into the tissue. To overcome this challenge, we examined the potential of vacuum infiltration, along with carbonation, to increase the penetration of cryoprotectants. In particular, we hypothesized that initial exposure to high-pressure carbon dioxide gas would introduce bubbles into the tissue and that subsequent vacuum cycling would cause expansion and contraction of the bubbles, thus enhancing the transport of cryoprotectant into the tissue. Experiments were carried out using colored dye and agarose gel as a model revealing that carbonation and vacuum cycling result in a 14% increase in dye penetration compared to the atmospheric controls. Experiments were also carried out by exposing VBs isolated from human vertebrae to 40% (v/v) DMSO solution. CT imaging showed the presence of gas bubbles within the tissue pores for carbonated VBs as well as control VBs. Vacuum cycling reduced the bubble volume by more than 50%, most likely resulting in replacement of this volume with DMSO solution. However, we were unable to detect a statistically significant increase in DMSO concentration within the VBs using CT imaging. This research suggests that there may be a modest benefit to carbonation and vacuum cycling for introduction of cryoprotectants into larger structures, like VBs.
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Affiliation(s)
- Ryan J Forcier
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
| | - Robert T Heussner
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
| | - Lauren Newsom
- Department of Clinical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - Morgan B Giers
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
| | | | | | | | | | - Adam Z Higgins
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA.
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14
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Yan Y, Wang T, Zhang R, Liu Y, Hu W, Sitti M. Magnetically assisted soft milli-tools for occluded lumen morphology detection. SCIENCE ADVANCES 2023; 9:eadi3979. [PMID: 37585531 PMCID: PMC10431716 DOI: 10.1126/sciadv.adi3979] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 07/17/2023] [Indexed: 08/18/2023]
Abstract
Methodologies based on intravascular imaging have revolutionized the diagnosis and treatment of endovascular diseases. However, current methods are limited in detecting, i.e., visualizing and crossing, complicated occluded vessels. Therefore, we propose a miniature soft tool comprising a magnet-assisted active deformation segment (ADS) and a fluid drag-driven segment (FDS) to visualize and cross the occlusions with various morphologies. First, via soft-bodied deformation and interaction, the ADS could visualize the structure details of partial occlusions with features as small as 0.5 millimeters. Then, by leveraging the fluidic drag from the pulsatile flow, the FDS could automatically detect an entry point selectively from severe occlusions with complicated microchannels whose diameters are down to 0.2 millimeters. The functions have been validated in both biologically relevant phantoms and organs ex vivo. This soft tool could help enhance the efficacy of minimally invasive medicine for the diagnosis and treatment of occlusions in various circulatory systems.
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Affiliation(s)
- Yingbo Yan
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany
- Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi’an Jiaotong University, Xi’an 710049, China
| | - Tianlu Wang
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany
| | - Rongjing Zhang
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany
| | - Yilun Liu
- Laboratory for Multiscale Mechanics and Medical Science, SV LAB, School of Aerospace, Xi’an Jiaotong University, Xi’an 710049, China
| | - Wenqi Hu
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany
| | - Metin Sitti
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany
- Department of Information Technology and Electrical Engineering, ETH Zurich, 8092 Zurich, Switzerland
- School of Medicine and College of Engineering, Koç University, Istanbul 34450, Turkey
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15
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Simińska-Stanny J, Hachemi F, Dodi G, Cojocaru FD, Gardikiotis I, Podstawczyk D, Delporte C, Jiang G, Nie L, Shavandi A. Optimizing phenol-modified hyaluronic acid for designing shape-maintaining biofabricated hydrogel scaffolds in soft tissue engineering. Int J Biol Macromol 2023:125201. [PMID: 37270140 DOI: 10.1016/j.ijbiomac.2023.125201] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/18/2023] [Accepted: 05/31/2023] [Indexed: 06/05/2023]
Abstract
In this study, we developed a well-printable biomaterial ink for 3D printing of shape-maintaining hydrogel scaffolds. The hydrogel base comprised tyramine-modified hyaluronic acid (HA-Tyr) and gelatin methacrylate (GelMA) and was dually cross-linked. Using the Box-Behnken design, we explored how varying the ink composition affected fiber formation and shape preservation. By adjusting the polymer ratios, we produced a stable hydrogel with varying responses, from a viscous liquid to a thick gel, and optimized 3D scaffolds that were structurally stable both during and after printing, offering precision and flexibility. Our ink exhibited shear-thinning behavior and high swelling capacity, as well as ECM-like characteristics and biocompatibility, making it an ideal candidate for soft tissues matrices with storage modulus of around 300 Pa. Animal trials and CAM assays confirmed its biocompatibility and integration with host tissue.
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Affiliation(s)
- Julia Simińska-Stanny
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles, 3BIO-BioMatter, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium; Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Norwida 4/6, 50-373 Wroclaw, Poland
| | - Feza Hachemi
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles, 3BIO-BioMatter, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium; Université Paris Saclay, Polytech Paris Saclay, Rue Louis de Broglie, 91400 Orsay, France
| | - Gianina Dodi
- Faculty of Medical Bioengineering, Grigore T. Popa, University of Medicine and Pharmacy of Iasi, Romania
| | - Florina D Cojocaru
- Faculty of Medical Bioengineering, Grigore T. Popa, University of Medicine and Pharmacy of Iasi, Romania
| | - Ioannis Gardikiotis
- Advanced Research and Development Center for Experimental Medicine (CEMEX), Grigore T. Popa, University of Medicine and Pharmacy of Iasi, Romania
| | - Daria Podstawczyk
- Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Norwida 4/6, 50-373 Wroclaw, Poland
| | - Christine Delporte
- Université libre de Bruxelles (ULB), Faculté de Médecine, Campus Erasme - CP 611, Laboratory of Pathophysiological and Nutritional Biochemistry, Route de Lennik, 808, 1070 Bruxelles, Belgium
| | - Guohua Jiang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, China; International Scientific and Technological Cooperation Base of Intelligent Biomaterials and Functional Fibers, Zhejiang Sci-Tech University, Hangzhou, China
| | - Lei Nie
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles, 3BIO-BioMatter, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium; College of Life Science, Xinyang Normal University, Xinyang, China
| | - Amin Shavandi
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles, 3BIO-BioMatter, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium.
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16
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Sekar MP, Budharaju H, Sethuraman S, Sundaramurthi D. Carboxymethyl cellulose-agarose-gelatin: A thermoresponsive triad bioink composition to fabricate volumetric soft tissue constructs. SLAS Technol 2023; 28:183-198. [PMID: 37149220 DOI: 10.1016/j.slast.2023.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/18/2023] [Accepted: 04/27/2023] [Indexed: 05/08/2023]
Abstract
Polysaccharide based hydrogels have been predominantly utilized as ink materials for 3D bioprinting due to biocompatibility and cell responsive features. However, most hydrogels require extensive crosslinking due to poor mechanical properties leading to limited printability. To improve printability without using cytotoxic crosslinkers, thermoresponsive bioinks could be developed. Agarose is a thermoresponsive polysaccharide with upper critical solution temperature (UCST) for sol-gel transition at 35-37 °C. Therefore, we hypothesized that a triad of carboxymethyl cellulose(C)-agarose(A)-gelatin(G) could be a suitable thermoresponsive ink for printing since they undergo instantaneous gelation without any addition of crosslinkers after bioprinting. The blend of agarose-carboxymethyl cellulose was mixed with 1% w/v, 3% w/v and 5% w/v gelatin to optimize the triad ratio for hydrogel formation. It was observed that a blend (C2-A0.5-G1 and C2-A1-G1) containing 2% w/v carboxymethyl cellulose, 0.5% or 1% w/v agarose and 1% w/v gelatin formed better hydrogels with higher stability for up to 21 days in DPBS at 37 °C. Further, C2-A0.5-G1 and C2-A1-G1hydrogels showed higher storage modulus 762 ± 182 Pa & 2452 ± 430 Pa, higher porosity of 96.98 ± 2% & 98.2 ± 0.8% and swellability of 1518 ± 68% & 1587 ± 25% respectively. To evaluate the in vitro potential of these bioink formulations, indirect and direct cytotoxicity were determined using NCTC clone 929 (mouse fibroblast cells) and HADF (primary human adult dermal fibroblast) cells as per the ISO 10993-5 standards. Importantly, the printability of these bioinks was confirmed using extrusion bioprinting by successfully printing different complex 3D patterns.
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Affiliation(s)
- Muthu Parkkavi Sekar
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu 613 401, India
| | - Harshavardhan Budharaju
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu 613 401, India
| | - Swaminathan Sethuraman
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu 613 401, India
| | - Dhakshinamoorthy Sundaramurthi
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu 613 401, India.
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17
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Valls-Esteve A, Lustig-Gainza P, Adell-Gomez N, Tejo-Otero A, Englí-Rueda M, Julian-Alvarez E, Navarro-Sureda O, Fenollosa-Artés F, Rubio-Palau J, Krauel L, Munuera J. A state-of-the-art guide about the effects of sterilization processes on 3D-printed materials for surgical planning and medical applications: A comparative study. Int J Bioprint 2023; 9:756. [PMID: 37555083 PMCID: PMC10406103 DOI: 10.18063/ijb.756] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/01/2023] [Indexed: 08/10/2023] Open
Abstract
Surgeons use different medical devices in the surgery, such as patient-specific anatomical models, cutting and positioning guides, or implants. These devices must be sterilized before being used in the operation room. There are many sterilization processes available, with autoclave, hydrogen peroxide, and ethylene oxide being the most common in hospital settings. Each method has both advantages and disadvantages in terms of mechanics, chemical interaction, and post-treatment accuracy. The aim of the present study is to evaluate the dimensional and mechanical effect of the most commonly used sterilization techniques available in clinical settings, i.e., Autoclave 121, Autoclave 134, and hydrogen peroxide (HPO), on 11 of the most used 3D-printed materials fabricated using additive manufacturing technologies. The results showed that the temperature (depending on the sterilization method) and the exposure time to that temperature influence not only the mechanical behavior but also the original dimensioning planned on the 3D model. Therefore, HPO is a better overall option for most of the materials evaluated. Finally, based on the results of the study, a recommendation guide on sterilization methods per material, technology, and clinical application is presented.
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Affiliation(s)
- Arnau Valls-Esteve
- Innovation Department, Hospital Sant Joan de Déu,
Esplugues de Llobregat, Spain
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | | | - Nuria Adell-Gomez
- Innovation Department, Hospital Sant Joan de Déu,
Esplugues de Llobregat, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | - Aitor Tejo-Otero
- Centre CIM, Universitat Politècnica de Catalunya
(CIM UPC), Barcelona, Spain
| | - Marti Englí-Rueda
- Innovation Department, Hospital Sant Joan de Déu,
Esplugues de Llobregat, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | | | - Osmeli Navarro-Sureda
- Sterilization Department, Hospital Sant Joan de Déu,
Universitat de Barcelona, Spain
| | - Felip Fenollosa-Artés
- Centre CIM, Universitat Politècnica de Catalunya
(CIM UPC), Barcelona, Spain
- Department of Mechanical Engineering, School of Engineering
of Barcelona (ETSEIB), Universitat Politècnica de Catalunya, Barcelona,
Spain
| | - Josep Rubio-Palau
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Department of Pediatric Surgery, Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Maxillofacial Unit, Department of Pediatric Surgery,
Hospital Sant Joan de Déu, Universitat de Barcelona, Spain
| | - Lucas Krauel
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Department of Pediatric Surgery, Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | - Josep Munuera
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Department of Diagnostic Imaging, Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
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18
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Valls-Esteve A, Tejo-Otero A, Lustig-Gainza P, Buj-Corral I, Fenollosa-Artés F, Rubio-Palau J, Barber-Martinez de la Torre I, Munuera J, Fondevila C, Krauel L. Patient-Specific 3D Printed Soft Models for Liver Surgical Planning and Hands-On Training. Gels 2023; 9:gels9040339. [PMID: 37102951 PMCID: PMC10138006 DOI: 10.3390/gels9040339] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/06/2023] [Accepted: 04/11/2023] [Indexed: 04/28/2023] Open
Abstract
Background: Pre-surgical simulation-based training with three-dimensional (3D) models has been intensively developed in complex surgeries in recent years. This is also the case in liver surgery, although with fewer reported examples. The simulation-based training with 3D models represents an alternative to current surgical simulation methods based on animal or ex vivo models or virtual reality (VR), showing reported advantages, which makes the development of realistic 3D-printed models an option. This work presents an innovative, low-cost approach for producing patient-specific 3D anatomical models for hands-on simulation and training. Methods: The article reports three paediatric cases presenting complex liver tumours that were transferred to a major paediatric referral centre for treatment: hepatoblastoma, hepatic hamartoma and biliary tract rhabdomyosarcoma. The complete process of the additively manufactured liver tumour simulators is described, and the different steps for the correct development of each case are explained: (1) medical image acquisition; (2) segmentation; (3) 3D printing; (4) quality control/validation; and (5) cost. A digital workflow for liver cancer surgical planning is proposed. Results: Three hepatic surgeries were planned, with 3D simulators built using 3D printing and silicone moulding techniques. The 3D physical models showed highly accurate replications of the actual condition. Additionally, they proved to be more cost-effective in comparison with other models. Conclusions: It is demonstrated that it is possible to manufacture accurate and cost-effective 3D-printed soft surgical planning simulators for treating liver cancer. The 3D models allowed for proper pre-surgical planning and simulation training in the three cases reported, making it a valuable aid for surgeons.
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Affiliation(s)
- Arnau Valls-Esteve
- Innovation Department, Hospital Sant Joan de Déu, Universitat de Barcelona, Santa Rosa 39-57, 08950 Esplugues de Llobregat, Spain
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Carrer de Casanova, 143, 08036 Barcelona, Spain
- 3D Unit (3D4H), Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
| | - Aitor Tejo-Otero
- Centre CIM, Universitat Politècnica de Catalunya (CIM UPC), Carrer de Llorens i Artigas, 12, 08028 Barcelona, Spain
| | - Pamela Lustig-Gainza
- Centre CIM, Universitat Politècnica de Catalunya (CIM UPC), Carrer de Llorens i Artigas, 12, 08028 Barcelona, Spain
| | - Irene Buj-Corral
- Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya, Av. Diagonal, 647, 08028 Barcelona, Spain
| | - Felip Fenollosa-Artés
- Centre CIM, Universitat Politècnica de Catalunya (CIM UPC), Carrer de Llorens i Artigas, 12, 08028 Barcelona, Spain
- Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya, Av. Diagonal, 647, 08028 Barcelona, Spain
| | - Josep Rubio-Palau
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Carrer de Casanova, 143, 08036 Barcelona, Spain
- 3D Unit (3D4H), Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
- Pediatric Surgical Oncology Unit, Pediatric Surgery Department, Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
- Maxillofacial Unit, Department of Pediatric Surgery, Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
| | | | - Josep Munuera
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Carrer de Casanova, 143, 08036 Barcelona, Spain
- 3D Unit (3D4H), Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
- Department of Diagnostic Imaging, Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
| | - Constantino Fondevila
- Hepatopancreatobiliary Surgery and Transplantation, General and Digestive Surgery, Metabolic and Digestive Diseases Institute (ICMDM), Hospital Clínic, CIBERehd, IDIBAPS, University of Barcelona, 08950 Esplugues de Llobregat, Spain
| | - Lucas Krauel
- Medicina i Recerca Translacional, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Carrer de Casanova, 143, 08036 Barcelona, Spain
- 3D Unit (3D4H), Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
- Pediatric Surgical Oncology Unit, Pediatric Surgery Department, Hospital Sant Joan de Déu, Universitat de Barcelona, 08950 Esplugues de Llobregat, Spain
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19
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Wang Y, Wei Q. Editorial on the Special Issue "Modification of Hydrogels and Their Applications in Biomedical Engineering". Gels 2023; 9:gels9040263. [PMID: 37102875 PMCID: PMC10137481 DOI: 10.3390/gels9040263] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 03/16/2023] [Accepted: 03/16/2023] [Indexed: 04/28/2023] Open
Abstract
Hydrogels and hydrophilic polymer networks play an important role in biomedical engineering due to their good biocompatibility, biodegradability, hydrophilicity, and mechanical properties, similarly to some soft tissues [...].
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Affiliation(s)
- Yanen Wang
- Department of Indurstry and Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
- Bio-Additive Manufacturing University-Enterprise Joint Research Center of Shaanxi Province, Northwestern Polytechnical University, Xi'an 710072, China
| | - Qinghua Wei
- Department of Indurstry and Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
- Bio-Additive Manufacturing University-Enterprise Joint Research Center of Shaanxi Province, Northwestern Polytechnical University, Xi'an 710072, China
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20
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Sangroniz L, Fernández M, Santamaria A. Polymers and rheology: A tale of give and take. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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21
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Saladino GM, Kakadiya R, Ansari SR, Teleki A, Toprak MS. Magnetoresponsive fluorescent core-shell nanoclusters for biomedical applications. NANOSCALE ADVANCES 2023; 5:1323-1330. [PMID: 36866251 PMCID: PMC9972542 DOI: 10.1039/d2na00887d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Nowadays, superparamagnetic iron oxide nanoparticles (SPIONs) have a dominant role in many subfields of biomedicine. Owing to their peculiar properties, they can be employed for magnetic separation, drug delivery, diagnostics, and hyperthermia treatments. However, these magnetic nanoparticles (NPs) suffer from low unit magnetization due to size constraints (up to 20-30 nm) to exhibit superparamagnetic character. In this work, we have designed and synthesized superparamagnetic nanoclusters (SP-NCs) with diameters of up to 400 nm with high unit magnetization for enhanced loading capacity. These were synthesized with conventional or microwave-assisted solvothermal methods, in the presence of either of the two biomolecules (citrate or l-lysine) as the capping agent. Primary particle size, SP-NC size, surface chemistry, and the resultant magnetic properties were observed to be significantly influenced by the choice of synthesis route and capping agent. Selected SP-NCs were then coated with a fluorophore-doped silica shell to provide fluorescence properties, in the near-infrared spectrum region, while silica provided high chemical and colloidal stability. Heating efficiency studies were performed under alternating magnetic field on the synthesized SP-NCs, highlighting their potential in hyperthermia treatment. We envision that their enhanced magnetically-active content, fluorescence, magnetic property, and heating efficiency will pave the way to more effective uses in biomedical applications.
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Affiliation(s)
- Giovanni Marco Saladino
- Department of Applied Physics, Biomedical and X-ray Physics, KTH Royal Institute of Technology SE 10691 Stockholm Sweden
| | - Ronak Kakadiya
- Department of Applied Physics, Biomedical and X-ray Physics, KTH Royal Institute of Technology SE 10691 Stockholm Sweden
| | - Shaquib Rahman Ansari
- Department of Pharmacy, Science for Life Laboratory, Uppsala University SE 75123 Uppsala Sweden
| | - Alexandra Teleki
- Department of Pharmacy, Science for Life Laboratory, Uppsala University SE 75123 Uppsala Sweden
| | - Muhammet Sadaka Toprak
- Department of Applied Physics, Biomedical and X-ray Physics, KTH Royal Institute of Technology SE 10691 Stockholm Sweden
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22
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Kainz MP, Greiner A, Hinrichsen J, Kolb D, Comellas E, Steinmann P, Budday S, Terzano M, Holzapfel GA. Poro-viscoelastic material parameter identification of brain tissue-mimicking hydrogels. Front Bioeng Biotechnol 2023; 11:1143304. [PMID: 37101751 PMCID: PMC10123293 DOI: 10.3389/fbioe.2023.1143304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 03/27/2023] [Indexed: 04/28/2023] Open
Abstract
Understanding and characterizing the mechanical and structural properties of brain tissue is essential for developing and calibrating reliable material models. Based on the Theory of Porous Media, a novel nonlinear poro-viscoelastic computational model was recently proposed to describe the mechanical response of the tissue under different loading conditions. The model contains parameters related to the time-dependent behavior arising from both the viscoelastic relaxation of the solid matrix and its interaction with the fluid phase. This study focuses on the characterization of these parameters through indentation experiments on a tailor-made polyvinyl alcohol-based hydrogel mimicking brain tissue. The material behavior is adjusted to ex vivo porcine brain tissue. An inverse parameter identification scheme using a trust region reflective algorithm is introduced and applied to match experimental data obtained from the indentation with the proposed computational model. By minimizing the error between experimental values and finite element simulation results, the optimal constitutive model parameters of the brain tissue-mimicking hydrogel are extracted. Finally, the model is validated using the derived material parameters in a finite element simulation.
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Affiliation(s)
- Manuel P. Kainz
- Institute of Biomechanics, Graz University of Technology, Graz, Austria
| | - Alexander Greiner
- Department Mechanical Engineering, Institute of Applied Mechanics, Friedrich Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Jan Hinrichsen
- Department Mechanical Engineering, Institute of Applied Mechanics, Friedrich Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Dagmar Kolb
- Center for Medical Research, Gottfried Schatz Research Center, Core Facility Ultrastructure Analysis, Medical University of Graz, Graz, Austria
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Ester Comellas
- Department of Physics, Serra Húnter Fellow, Universitat Politècnica de Catalunya (UPC), Barcelona, Spain
| | - Paul Steinmann
- Department Mechanical Engineering, Institute of Applied Mechanics, Friedrich Alexander-University Erlangen-Nürnberg, Erlangen, Germany
- Glasgow Computational Engineering Centre, University of Glasgow, Glasgow, United Kingdom
| | - Silvia Budday
- Department Mechanical Engineering, Institute of Applied Mechanics, Friedrich Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Michele Terzano
- Institute of Biomechanics, Graz University of Technology, Graz, Austria
| | - Gerhard A. Holzapfel
- Institute of Biomechanics, Graz University of Technology, Graz, Austria
- Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
- *Correspondence: Gerhard A. Holzapfel,
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23
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Kakarla AB, Kong I, Nguyen TH, Kong C, Irving H. Boron nitride nanotubes reinforced gelatin hydrogel-based ink for bioprinting and tissue engineering applications. BIOMATERIALS ADVANCES 2022; 141:213103. [PMID: 36084352 DOI: 10.1016/j.bioadv.2022.213103] [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: 05/11/2022] [Revised: 08/08/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
The rapid evolution of 3D bioprinting technique, very few biomaterials have been studied and utilised as ink solutions to produce structures. In this work, a polymeric nanocomposite hydrogel-based ink solution was developed using boron nitride nanotubes (BNNTs) reinforced gelatin for 3D bioprinting of scaffolds. The ink solutions and printed scaffolds were characterised for their printability, mechanical, thermal, water uptake, and biological properties (cell viability and inflammation). The viscoelastic behaviour of the scaffolds indicated the increase in storage modulus with an increase in BNNTs composition. Additionally, the compressive strength of the scaffolds increased from 9.43 ± 1.3 kPa to 30.09 ± 1.5 kPa with the addition of BNNTs. Similarly, the thermal stability of the scaffolds enhanced with an increase in BNNTs composition. Furthermore, the scaffolds with a higher concentration of BNNTs displayed resilience in cell culture media at 37 °C for up to 14 days compared with pure gelatin scaffolds. The cell viability results showed a decreased viability rate with an increased concentration of BNNTs scaffolds. However, BNNTs incubated with cells did not display cytokine inflammation. Therefore, this work provides a potential hydrogel-based ink solution for 3D bioprinting of biomimetic tissue constructs with adequate structural stability for a wide range of tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Akesh Babu Kakarla
- School of Computing Engineering and Mathematical Sciences, La Trobe University, Bendigo, Victoria 3350, Australia
| | - Ing Kong
- School of Computing Engineering and Mathematical Sciences, La Trobe University, Bendigo, Victoria 3350, Australia.
| | - Trang Hong Nguyen
- Department of Rural Clinical Sciences, La Trobe Institute for Molecular Sciences, Bendigo, Victoria 3550, Australia
| | - Cin Kong
- Department of Biomedical Sciences, University of Nottingham Malaysia Campus, Semenyih, Selangor 43500, Malaysia
| | - Helen Irving
- Department of Rural Clinical Sciences, La Trobe Institute for Molecular Sciences, Bendigo, Victoria 3550, Australia
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24
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Buj-Corral I, Tejo-Otero A. 3D Printing of Bioinert Oxide Ceramics for Medical Applications. J Funct Biomater 2022; 13:155. [PMID: 36135590 PMCID: PMC9505679 DOI: 10.3390/jfb13030155] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 11/23/2022] Open
Abstract
Three-dimensionally printed metals and polymers have been widely used and studied in medical applications, yet ceramics also require attention. Ceramics are versatile materials thanks to their excellent properties including high mechanical properties and hardness, good thermal and chemical behavior, and appropriate, electrical, and magnetic properties, as well as good biocompatibility. Manufacturing complex ceramic structures employing conventional methods, such as ceramic injection molding, die pressing or machining is extremely challenging. Thus, 3D printing breaks in as an appropriate solution for complex shapes. Amongst the different ceramics, bioinert ceramics appear to be promising because of their physical properties, which, for example, are similar to those of a replaced tissue, with minimal toxic response. In this way, this review focuses on the different medical applications that can be achieved by 3D printing of bioinert ceramics, as well as on the latest advances in the 3D printing of bioinert ceramics. Moreover, an in-depth comparison of the different AM technologies used in ceramics is presented to help choose the appropriate methods depending on the part geometry.
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25
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Santos GL, DeGrave AN, Rehman A, Al Disi S, Xhaxho K, Schröder H, Bao G, Meyer T, Tiburcy M, Dworatzek E, Zimmermann WH, Lutz S. Using different geometries to modulate the cardiac fibroblast phenotype and the biomechanical properties of engineered connective tissues. BIOMATERIALS ADVANCES 2022; 139:213041. [PMID: 35909053 DOI: 10.1016/j.bioadv.2022.213041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 07/11/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Tissue engineering with human cardiac fibroblasts (CF) allows identifying novel mechanisms and anti-fibrotic drugs in the context of cardiac fibrosis. However, substantial knowledge on the influences of the used materials and tissue geometries on tissue properties and cell phenotypes is necessary to be able to choose an appropriate model for a specific research question. As there is a clear lack of information on how CF react to the mold architecture in engineered connective tissues (ECT), we first compared the effect of two mold geometries and materials with different hardnesses on the biomechanical properties of ECT. We could show that ECT, which formed around two distant poles (non-uniform model) were less stiff and more strain-resistant than ECT, which formed around a central rod (uniform model), independent of the materials used for poles and rods. Next, we investigated the cell state and could demonstrate that in the uniform versus non-uniform model, the embedded cells have a higher cell cycle activity and display a more pronounced myofibroblast phenotype. Differential gene expression analysis revealed that uniform ECT displayed a fibrosis-associated gene signature similar to the diseased heart. Furthermore, we were able to identify important relationships between cell and tissue characteristics, as well as between biomechanical tissue parameters by implementing cells from normal heart and end-stage heart failure explants from patients with ischemic or dilated cardiomyopathy. Finally, we show that the application of pro- and anti-fibrotic factors in the non-uniform and uniform model, respectively, is not sufficient to mimic the effect of the other geometry. Taken together, we demonstrate that modifying the mold geometry in tissue engineering with CF offers the possibility to compare different cellular phenotypes and biomechanical tissue properties.
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Affiliation(s)
- Gabriela L Santos
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; Randall Centre for Cell and Molecular Biophysics, King's College London, London, UK; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany
| | - Alisa N DeGrave
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany
| | - Abdul Rehman
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany
| | - Sara Al Disi
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany
| | - Kristin Xhaxho
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany
| | - Helen Schröder
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany
| | - Guobin Bao
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany
| | - Tim Meyer
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany
| | - Malte Tiburcy
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany
| | - Elke Dworatzek
- Charité - Universitaetsmedizin Berlin, Corporate Member of Freie Universitaet Berlin, and Berliner Institute of Health, Germany; DZHK (German Center for Cardiovascular Research) partner site, Berlin, Germany
| | - Wolfram-Hubertus Zimmermann
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany; Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Germany; Center for Neurodegenerative Diseases (DZNE), Germany; Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Germany
| | - Susanne Lutz
- Institute of Pharmacology and Toxicology, University Medical Center Goettingen, Germany; DZHK (German Center for Cardiovascular Research) partner site, Goettingen, Germany.
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26
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Air Plasma Functionalization of Electrospun Nanofibers for Skin Tissue Engineering. Biomedicines 2022; 10:biomedicines10030617. [PMID: 35327419 PMCID: PMC8945861 DOI: 10.3390/biomedicines10030617] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/01/2022] [Accepted: 03/04/2022] [Indexed: 12/15/2022] Open
Abstract
Nowadays, gelatin, a molecular derivative of collagen, has gained increasing interest in tissue engineering applications due to excellent biocompatibility, biodegradability, availability, process simplicity, and low costs. In this study, we fabricated tannic acid-crosslinked gelatin nanofibers by electrospinning method. In order to increase the bio-functionality of scaffolds, they were exposed to the atmospheric air plasma. Several analytical tools were used for evaluation of nanofibers including scanning electron microscopy (SEM), atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, X-ray diffraction (XRD), and water contact angle equipment (CA) together with biocompatibility study using fibroblast cells. Results demonstrated that atmospheric air plasma is not only able to improve the hydrophilicity of nanofibers but it also improves the bio-functionality against human skin fibroblast cells. Hence, we recommend atmospheric air plasma pre-treatment approach for the surface functionalization of gelatin nanofibers for skin tissue engineering applications.
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27
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Wiwatsamphan P, Chirachanchai S. Persistently Reversible pH-/Thermo-responsive Chitosan/Poly (N-isopropyl acrylamide) Hydrogel through Clickable Crosslinked Interpenetrating Network. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.109874] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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