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Sajad Daneshi S, Tayebi L, Talaei-Khozani T, Tavanafar S, Hadaegh AH, Rasoulianboroujeni M, Rastegari B, Asadi-Yousefabad SL, Nammian P, Zare S, Mussin NM, Kaliyev AA, Zhelisbayeva KR, Tanideh N, Tamadon A. Reconstructing Critical-Sized Mandibular Defects in a Rabbit Model: Enhancing Angiogenesis and Facilitating Bone Regeneration via a Cell-Loaded 3D-Printed Hydrogel-Ceramic Scaffold Application. ACS Biomater Sci Eng 2024. [PMID: 38619014 DOI: 10.1021/acsbiomaterials.4c00580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
In this study, we propose a spatially patterned 3D-printed nanohydroxyapatite (nHA)/beta-tricalcium phosphate (β-TCP)/collagen composite scaffold incorporating human dental pulp-derived mesenchymal stem cells (hDP-MSCs) for bone regeneration in critical-sized defects. We investigated angiogenesis and osteogenesis in a rabbit critical-sized mandibular defect model treated with this engineered construct. The critical and synergistic role of collagen coating and incorporation of stem cells in the regeneration process was confirmed by including a cell-free uncoated 3D-printed nHA/β-TCP scaffold, a stem cell-loaded 3D-printed nHA/β-TCP scaffold, and a cell-free collagen-coated 3D-printed nHA/β-TCP scaffold in the experimental design, in addition to an empty defect. Posteuthanasia evaluations through X-ray analysis, histological assessments, immunohistochemistry staining, histomorphometry, and reverse transcription-polymerase chain reaction (RT-PCR) suggest the formation of substantial woven and lamellar bone in the cell-loaded collagen-coated 3D-printed nHA/β-TCP scaffolds. Histomorphometric analysis demonstrated a significant increase in osteoblasts, osteocytes, osteoclasts, bone area, and vascularization compared to that observed in the control group. Conversely, a significant decrease in fibroblasts/fibrocytes and connective tissue was observed in this group compared to that in the control group. RT-PCR indicated a significant upregulation in the expression of osteogenesis-related genes, including BMP2, ALPL, SOX9, Runx2, and SPP1. The findings suggest that the hDP-MSC-loaded 3D-printed nHA/β-TCP/collagen composite scaffold is promising for bone regeneration in critical-sized defects.
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Affiliation(s)
- Seyyed Sajad Daneshi
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz 71348, Iran
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, Wisconsin 53233, United States
| | - Tahereh Talaei-Khozani
- Tissue Engineering Laboratory, Department of Anatomy, School of Medicine, Shiraz University of Medical Sciences, Shiraz 71348, Iran
| | - Saeid Tavanafar
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Birjand University of Medical Sciences, Birjand 97178, Iran
| | - Amir Hossein Hadaegh
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz 71348, Iran
- Ryangene Biolab Co. LTD, Shiraz 71348, Iran
| | | | - Banafsheh Rastegari
- Ryangene Biolab Co. LTD, Shiraz 71348, Iran
- Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz 71348, Iran
| | - Seyedeh-Leili Asadi-Yousefabad
- Department of Molecular Medicine, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz 71348, Iran
| | - Pegah Nammian
- Department of Molecular Medicine, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz 71348, Iran
| | - Shahrokh Zare
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz 71348, Iran
| | - Nadiar M Mussin
- Department of Surgery No. 2, West Kazakhstan Medical University, Aktobe 030012, Kazakhstan
| | - Asset A Kaliyev
- Department of Surgery No. 2, West Kazakhstan Medical University, Aktobe 030012, Kazakhstan
| | - Kulyash R Zhelisbayeva
- Department of Scientific Works, West Kazakhstan Marat Ospanov Medical University, Aktobe 030012, Kazakhstan
| | - Nader Tanideh
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz 71348, Iran
- Department of Pharmacology, School of Medicine, Shiraz University of Medical Sciences, Shiraz 71348, Iran
- PerciaVista R&D Co., Shiraz 71348, Iran
| | - Amin Tamadon
- PerciaVista R&D Co., Shiraz 71348, Iran
- Department of Natural Sciences, West Kazakhstan Marat Ospanov Medical University, Aktobe 030012, Kazakhstan
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Sriram M, Priya S, Mahajan A, Katti DS. Directing ligament-mimetic bi-directional cell organization in scaffolds through zone-specific microarchitecture for ligament tissue engineering. Biofabrication 2024; 16:025015. [PMID: 38277689 DOI: 10.1088/1758-5090/ad22f2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 01/26/2024] [Indexed: 01/28/2024]
Abstract
Ligament tissues exhibit zone-specific anisotropic cell organization. The cells in ligament-proper are longitudinally oriented, whereas, the cells in epiligament are circumferentially oriented. Therefore, scaffolds developed to regenerate ligament tissues should possess adequate architectural features to govern ligament-mimetic bi-directional cell organization. The scaffold architectural features along with ligament-mimetic cell organization may ultimately yield neo-tissues with ligament-like extracellular matrix (ECM) structure and biomechanical properties. Towards this goal, we fabricated a silk/gelatin-based core-shell scaffold (csSG) with zone-specific anisotropic architectural features, wherein, the core of the scaffold possessed longitudinally aligned pores while the shell of the scaffold possessed parallel microgrooves that are aligned circumferentially around the surface of the scaffold. The ligament-mimetic architectural features significantly improved the mechanical properties of the scaffold. Moreover, architectural features of the csSG scaffold governed zone-specific anisotropic organization of cells. The cells in the core were longitudinally oriented as observed in the ligament-proper and the cells on the shell were circumferentially oriented as observed in epiligament. This bi-directional cell orientation partially mimicked the complex cellular network in native ligament tissue. Additionally, both the core and the shell individually supported fibrogenic differentiation of stem cells which further improved their potential for ligament tissue engineering. Further, the aligned pores of the core could govern unidirectional organization of ECM deposited by cells which is crucial for regenerating anisotropic tissues like ligaments. Finally, when implanted subcutaneously in mice, the scaffolds retained their anisotropic architecture for at least 2 weeks, were biocompatible, supported cell infiltration and governed anisotropic organization of cells and ECM. Taken together, the fabricated biomimetic csSG scaffold, through its zone-specific architectural features, could govern ligament-mimetic cellular and ECM organization which is ultimately expected to achieve regeneration of ligament tissues with native-like hierarchical structure and biomechanical properties. Consequently, this study introduces bi-directional structural parameters as design criteria for developing scaffolds for ligament tissue engineering.
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Affiliation(s)
- M Sriram
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
- Mehta Family Centre for Engineering in Medicine, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Smriti Priya
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Aman Mahajan
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
- Mehta Family Centre for Engineering in Medicine, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Dhirendra S Katti
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
- Mehta Family Centre for Engineering in Medicine, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
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Deng W, Kumar S, Vallone A, Kochmann DM, Greer JR. AI-Enabled Materials Design of Non-Periodic 3D Architectures With Predictable Direction-Dependent Elastic Properties. Adv Mater 2024:e2308149. [PMID: 38319025 DOI: 10.1002/adma.202308149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 01/08/2024] [Indexed: 02/07/2024]
Abstract
Natural porous materials have exceptional properties-for example, light weight, mechanical resilience, and multi-functionality. Efforts to imitate their properties in engineered structures have limited success. This, in part, is caused by the complexity of multi-phase materials composites and by the lack of quantified understanding of each component's role in overall hierarchy. This challenge is twofold: 1) computational. because non-periodicity and defects render constructing design guidelines between geometries and mechanical properties complex and expensive and 2) experimental. because the fabrication and characterization of complex, often hierarchical and non-periodic 3D architectures is non-trivial.
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Affiliation(s)
- Weiting Deng
- Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Siddhant Kumar
- Department of Materials Science and Engineering, Delft University of Technology, Delft, 2628 CD, The Netherlands
| | - Alberto Vallone
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Dennis M Kochmann
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Julia R Greer
- Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA, 91125, USA
- Kavli Nanoscience Institute at Caltech, Pasadena, CA, 91125, USA
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Badali V, Checa S, Zehn MM, Marinkovic D, Mohammadkhah M. Computational design and evaluation of the mechanical and electrical behavior of a piezoelectric scaffold: a preclinical study. Front Bioeng Biotechnol 2024; 11:1261108. [PMID: 38274011 PMCID: PMC10808828 DOI: 10.3389/fbioe.2023.1261108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
Piezoelectric scaffolds have been recently developed to explore their potential to enhance the bone regeneration process using the concept of piezoelectricity, which also inherently occurs in bone. In addition to providing mechanical support during bone healing, with a suitable design, they are supposed to produce electrical signals that ought to favor the cell responses. In this study, using finite element analysis (FEA), a piezoelectric scaffold was designed with the aim of providing favorable ranges of mechanical and electrical signals when implanted in a large bone defect in a large animal model, so that it could inform future pre-clinical studies. A parametric analysis was then performed to evaluate the effect of the scaffold design parameters with regard to the piezoelectric behavior of the scaffold. The designed scaffold consisted of a porous strut-like structure with piezoelectric patches covering its free surfaces within the scaffold pores. The results showed that titanium or PCL for the scaffold and barium titanate (BT) for the piezoelectric patches are a promising material combination to generate favorable ranges of voltage, as reported in experimental studies. Furthermore, the analysis of variance showed the thickness of the piezoelectric patches to be the most influential geometrical parameter on the generation of electrical signals in the scaffold. This study shows the potential of computer tools for the optimization of scaffold designs and suggests that patches of piezoelectric material, attached to the scaffold surfaces, can deliver favorable ranges of electrical stimuli to the cells that might promote bone regeneration.
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Affiliation(s)
- Vahid Badali
- Department of Structural Mechanics and Analysis, Technische Universität Berlin, Berlin, Germany
- Julius Wolff Institute, Berlin Institute of Health, Charité—Universitätsmedizin Berlin, Berlin, Germany
| | - Sara Checa
- Department of Structural Mechanics and Analysis, Technische Universität Berlin, Berlin, Germany
- Julius Wolff Institute, Berlin Institute of Health, Charité—Universitätsmedizin Berlin, Berlin, Germany
| | - Manfred M. Zehn
- Department of Structural Mechanics and Analysis, Technische Universität Berlin, Berlin, Germany
| | - Dragan Marinkovic
- Department of Structural Mechanics and Analysis, Technische Universität Berlin, Berlin, Germany
| | - Melika Mohammadkhah
- Department of Structural Mechanics and Analysis, Technische Universität Berlin, Berlin, Germany
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Ojo OA, Adegboyega AE, Taiwo OA, Olowosoke CB, Johnson GI, Umedum NL, Onuh K, Adeduro MN, Nwobodo VO, Elekan AO, Alemika TE, Johnson TO. Lead optimization of Allium sativum L. compounds for PTP1B inhibition in diabetes treatment: in silico molecular docking and dynamics simulation. J Biomol Struct Dyn 2023:1-15. [PMID: 38109128 DOI: 10.1080/07391102.2023.2294179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 12/01/2023] [Indexed: 12/19/2023]
Abstract
Protein tyrosine phosphatase 1B (PTP1B) has been identified as a promising drug target for the development of diabetes medications via an inhibition mechanism. Using a computational approach, this study investigates the binding mechanism of lead optimized natural compounds from Allium sativum against the human PTP1B. The molecular docking, induced-fit docking, and binding free energy calculations were analyzed using Schrödinger Suite 2021-2. MD simulation, and gene enrichment analysis was achieved via the Desmond module of Schrödinger to identify best compounds as inhibitors against PTP1B in diabetes management. The docking scores of the lead optimized compounds were good; 5280443_121 from apigenin had the best binding score of -9.345 kcal/mol, followed by 5280443_129 with a binding score of -9.200 kcal/mol, and 5280863_177 from kaempferol had a binding score of -8.528 kcal/mol, followed by 5280863_462 with a binding score of -8.338 kcal/mol. The top two lead optimized compounds, docked better than the standard PTP1B inhibitor (-7.155 kcal/mol), suggesting them as potent inhibitors than the standard PTP1B inhibitor. The outcomes of the induced-fit docking were consistent with the increased binding affinity used in the Glide computation of the five conformed poses between the derivatives (5280443_121, 5280443_129, 5280863_177, and 5280863_462) and the protein (PTP1B). Based on the binding fee energies (MM-GBSA), the lead optimized compounds from kaempferol exhibited more stability than those from apigenin. In the pharmacophore development, all the models exhibit good results across the different metrics. The best performing model with five of five matches on a 1.34 and 1.33 phase score was DDRRR_1, DDRRR_2, and DDDRR_1. The average BEDROC value (= 160.9) was 1, while the average EF 1% value across all models was 101. There were no substantial conformational modifications during the MD simulation process, indicating that the apigenin derivatives (5280443_121) was stable in the protein's active site in 100 ns. IGF1R, EGFR, INSR, PTPN1, SRC, JAK2, GRB2, BCAR1, and IRS1 are among the 11 potential targets found in the protein-protein interaction (PPI) of A. sativum against PTP1B that may be important in A. sativum's defense against PTP1B. Sixty-four (64) pathways were found by KEGG pathway enrichment analysis to be potentially involved in the anti-PTP1B of A. sativum. Consequently, data obtained indicates the effectiveness of the in silico studies in identifying potential lead compounds in A. sativum against PTP1B target.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Oluwafemi Adeleke Ojo
- Bowen University SDG 03 (Good Health and Wellbeing Research Group), Iwo, Nigeria
- Phytomedicine, Molecular Toxicology, and Computational Biochemistry Research Laboratory (PMTCB-RL), Department of Biochemistry, Bowen University, Iwo, Nigeria
| | - Abayomi Emmanuel Adegboyega
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of Jos, Jos, Nigeria
- Jaris Computational Biology Centre, Jos, Nigeria
| | | | - Christopher Busayo Olowosoke
- Department of Biotechnology, Federal University of Technology, Ondo, Nigeria
- Department of Biotechnology, Chrisland University, Abeokuta, Nigeria
| | - Grace Inioluwa Johnson
- Jaris Computational Biology Centre, Jos, Nigeria
- College of Health Sciences, University of Jos, Jos, Nigeria
| | - Ngozi Lillian Umedum
- Department of Organic and Medicinal Chemistry, Nnamdi Azikwe University, Akwa, Anambra, Nigeria
| | - Kingsley Onuh
- Department of Biotechnology, Nigerian Defence Academy, Kaduna
| | - Mary Nneka Adeduro
- Department of Pharmaceutical Chemistry, Univervisty of Lagos, Lagos, Nigeria
| | | | - Ayodele O Elekan
- Department of Biochemistry, Adekunle Ajasin University, Ondo, Nigeria
| | | | - Titilayo Omolara Johnson
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of Jos, Jos, Nigeria
- Jaris Computational Biology Centre, Jos, Nigeria
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Pasini C, Pandini S, Re F, Ferroni M, Borsani E, Russo D, Sartore L. New Poly(lactic acid)-Hydrogel Core-Shell Scaffolds Highly Support MSCs' Viability, Proliferation and Osteogenic Differentiation. Polymers (Basel) 2023; 15:4631. [PMID: 38139883 PMCID: PMC10747776 DOI: 10.3390/polym15244631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/01/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
Scaffolds for tissue engineering are expected to respond to a challenging combination of physical and mechanical requirements, guiding the research towards the development of novel hybrid materials. This study introduces innovative three-dimensional bioresorbable scaffolds, in which a stiff poly(lactic acid) lattice structure is meant to ensure temporary mechanical support, while a bioactive gelatin-chitosan hydrogel is incorporated to provide a better environment for cell adhesion and proliferation. The scaffolds present a core-shell structure, in which the lattice core is realized by additive manufacturing, while the shell is nested throughout the core by grafting and crosslinking a hydrogel forming solution. After subsequent freeze-drying, the hydrogel network forms a highly interconnected porous structure that completely envelops the poly(lactic acid) core. Thanks to this strategy, it is easy to tailor the scaffold properties for a specific target application by properly designing the lattice geometry and the core/shell ratio, which are found to significantly affect the scaffold mechanical performance and its bioresorption. Scaffolds with a higher core/shell ratio exhibit higher mechanical properties, whereas reducing the core/shell ratio results in higher values of bioactive hydrogel content. Hydrogel contents up to 25 wt% could be achieved while maintaining high compression stiffness (>200 MPa) and strength (>5 MPa), overall, within the range of values displayed by human bone tissue. In addition, mechanical properties remain stable after prolonged immersion in water at body temperature for several weeks. On the other hand, the hydrogel undergoes gradual and homogeneous degradation over time, but the core-shell integrity and structural stability are nevertheless maintained during at least 7-week hydrolytic degradation tests. In vitro experiments with human mesenchymal stromal cells reveal that the core-shell scaffolds are biocompatible, and their physical-mechanical properties and architecture are suitable to support cell growth and osteogenic differentiation, as demonstrated by hydroxyapatite formation. These results suggest that the bioresorbable core-shell scaffolds can be considered and further studied, in view of clinically relevant endpoints in bone regenerative medicine.
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Affiliation(s)
- Chiara Pasini
- Materials Science and Technology Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy; (C.P.); (S.P.)
| | - Stefano Pandini
- Materials Science and Technology Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy; (C.P.); (S.P.)
| | - Federica Re
- Unit of Blood Diseases and Bone Marrow Transplantation, Department of Clinical and Experimental Sciences, University of Brescia, ASST Spedali Civili, Piazzale Spedali Civili 1, 25123 Brescia, Italy; (F.R.); (D.R.)
| | - Matteo Ferroni
- Department of Civil, Environmental, Architectural Engineering and Mathematics (DICATAM), University of Brescia, Via Valotti 9, 25123 Brescia, Italy;
- National Research Council (CNR)—Institute for Microelectronics and Microsystems, Bologna, Via Gobetti, 101, 40129 Bologna, Italy
| | - Elisa Borsani
- Division of Anatomy and Physiopathology, Department of Clinical and Experimental Sciences, University of Brescia, 25123 Brescia, Italy;
| | - Domenico Russo
- Unit of Blood Diseases and Bone Marrow Transplantation, Department of Clinical and Experimental Sciences, University of Brescia, ASST Spedali Civili, Piazzale Spedali Civili 1, 25123 Brescia, Italy; (F.R.); (D.R.)
| | - Luciana Sartore
- Materials Science and Technology Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy; (C.P.); (S.P.)
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Hu P, Armato U, Freddi G, Chiarini A, Dal Prà I. Human Keratinocytes and Fibroblasts Co-Cultured on Silk Fibroin Scaffolds Exosomally Overrelease Angiogenic and Growth Factors. Cells 2023; 12:1827. [PMID: 37508492 PMCID: PMC10378127 DOI: 10.3390/cells12141827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/30/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Objectives: The optimal healing of skin wounds, deep burns, and chronic ulcers is an important clinical problem. Attempts to solve it have been driving the search for skin equivalents based on synthetic or natural polymers. Methods: Consistent with this endeavor, we used regenerated silk fibroin (SF) from Bombyx mori to produce a novel compound scaffold by welding a 3D carded/hydroentangled SF-microfiber-based nonwoven layer (C/H-3D-SFnw; to support dermis engineering) to an electrospun 2D SF nanofiber layer (ESFN; a basal lamina surrogate). Next, we assessed-via scanning electron microscopy, attenuated total reflectance Fourier transform infrared spectroscopy, differential scanning calorimetry, mono- and co-cultures of HaCaT keratinocytes and adult human dermal fibroblasts (HDFs), dsDNA assays, exosome isolation, double-antibody arrays, and angiogenesis assays-whether the C/H-3D-SFnws/ESFNs would allow the reconstitution of a functional human skin analog in vitro. Results: Physical analyses proved that the C/H-3D-SFnws/ESFNs met the requirements for human soft-tissue-like implants. dsDNA assays revealed that co-cultures of HaCaTs (on the 2D ESFN surface) and HDFs (inside the 3D C/H-3D-SFnws) grew more intensely than did the respective monocultures. Double-antibody arrays showed that the CD9+/CD81+ exosomes isolated from the 14-day pooled growth media of HDF and/or HaCaT mono- or co-cultures conveyed 35 distinct angiogenic/growth factors (AGFs). However, versus monocultures' exosomes, HaCaT/HDF co-cultures' exosomes (i) transported larger amounts of 15 AGFs, i.e., PIGF, ANGPT-1, bFGF, Tie-2, Angiogenin, VEGF-A, VEGF-D, TIMP-1/-2, GRO-α/-β/-γ, IL-1β, IL-6, IL-8, MMP-9, and MCP-1, and (ii) significantly more strongly stimulated human dermal microvascular endothelial cells to migrate and assemble tubes/nodes in vitro. Conclusions: Our results showed that both cell-cell and cell-SF interactions boosted the exosomal release of AGFs from HaCaTs/HDFs co-cultured on C/H-3D-SFnws/ESFNs. Hence, such exosomes are an asset for prospective clinical applications as they advance cell growth and neoangiogenesis and consequently graft take and skin healing. Moreover, this new integument analog could be instrumental in preclinical and translational studies on human skin pathophysiology and regeneration.
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Affiliation(s)
- Peng Hu
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
| | - Ubaldo Armato
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
| | | | - Anna Chiarini
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
| | - Ilaria Dal Prà
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
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Yadav S, Ahamad S, Gupta D, Mathur P. Lead optimization, pharmacophore development and scaffold design of protein kinase CK2 inhibitors as potential COVID-19 therapeutics. J Biomol Struct Dyn 2023; 41:1811-1827. [PMID: 35014595 DOI: 10.1080/07391102.2021.2024449] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Therapeutic agents being designed against COVID-19 have targeted either the virus directly or the host cellular machinery. A particularly attractive host target is the ubiquitous and constitutively active serine-threonine kinase, Protein kinase CK2 (CK2). CK2 enhances viral protein synthesis by inhibiting the sequestration of host translational machinery as stress granules and assists in viral egression via association with the N-protein at filopodial protrusions of the infected cell. CK2 inhibitors such as Silmitasertib have been proposed as possible therapeutic candidates in COVID-19 infections. The present study aims to optimize Silmitasertib, develop pharmacophore models and design unique scaffolds to modulate CK2. The lead optimization phase involved the generation of compounds structurally similar to Silmitasertib via bioisostere replacement followed by a multi-stage docking approach to identify drug-like candidates. Molecular dynamics (MD) simulations were performed for two promising candidates (ZINC-43206125 and PC-57664175) to estimate their binding stability and interaction. Top scoring candidates from the lead optimization phase were utilized to build ligand-based pharmacophore models. These models were then merged with structure-based pharmacophores (e-pharmacophores) to build a hybrid hypothesis. This hybrid hypothesis was validated against a decoy set and used to screen a diverse kinase inhibitors library to identify favored chemical features in the retrieved actives. These chemical features include; an anion, an aromatic ring and an H-bond acceptor. Based on the knowledge of these features; de-novo scaffold design was carried out which identified phenindiones, carboxylated steroids, macrocycles and peptides as novel scaffolds with the potential to modulate CK2.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Siddharth Yadav
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India
| | - Shahzaib Ahamad
- Translational Bioinformatics Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, India
| | - Dinesh Gupta
- Translational Bioinformatics Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, India
| | - Puniti Mathur
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India
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Doryab A, Groll J. Biomimetic In Vitro Lung Models: Current Challenges and Future Perspective. Adv Mater 2023; 35:e2210519. [PMID: 36750972 DOI: 10.1002/adma.202210519] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/10/2022] [Indexed: 06/18/2023]
Abstract
As post-COVID complications, chronic respiratory diseases are one of the foremost causes of mortality. The quest for a cure for this recent global challenge underlines that the lack of predictive in vitro lung models is one of the main bottlenecks in pulmonary preclinical drug development. Despite rigorous efforts to develop biomimetic in vitro lung models, the current cutting-edge models represent a compromise in numerous technological and biological aspects. Most advanced in vitro models are still in the "proof-of-concept" phase with a low clinical translation of the findings. On the other hand, advances in cellular and molecular studies are mainly based on relatively simple and unrealistic in vitro models. Herein, the current challenges and potential strategies toward not only bioinspired but truly biomimetic lung models are discussed.
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Affiliation(s)
- Ali Doryab
- Institute of Lung Health and Immunity (LHI) and Comprehensive Pneumology Center (CPC), Helmholtz Center Munich, Member of the German Center for Lung Research (DZL), Neuherberg, 85764, Munich, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry, Institute of Functional Materials and Biofabrication (IFB), and Bavarian Polymer Institute (BPI), University of Würzburg, 97070, Würzburg, Germany
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Abstract
Bio-scaffolds are synthetic entities widely employed in bone and soft-tissue regeneration applications. These bio-scaffolds are applied to the defect site to provide support and favor cell attachment and growth, thereby enhancing the regeneration of the defective site. The progressive research in bio-scaffold fabrication has led to identification of biocompatible and mechanically stable materials. The difficulties in obtaining grafts and expenditure incurred in the transplantation procedures have also been overcome by the implantation of bio-scaffolds. Drugs, cells, growth factors, and biomolecules can be embedded with bio-scaffolds to provide localized treatments. The right choice of materials and fabrication approaches can help in developing bio-scaffolds with required properties. This review mostly focuses on the available materials and bio-scaffold techniques for bone and soft-tissue regeneration application. The first part of this review gives insight into the various classes of biomaterials involved in bio-scaffold fabrication followed by design and simulation techniques. The latter discusses the various additive, subtractive, hybrid, and other improved techniques involved in the development of bio-scaffolds for bone regeneration applications. Techniques involving multimaterial printing and multidimensional printing have also been briefly discussed.
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Affiliation(s)
- Jishita Ravoor
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Mahendran Thangavel
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Renold Elsen S
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
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11
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Greaney AM, Niklason LE. The History of Engineered Tracheal Replacements: Interpreting the Past and Guiding the Future. Tissue Eng Part B Rev 2021; 27:341-352. [PMID: 33045942 PMCID: PMC8390779 DOI: 10.1089/ten.teb.2020.0238] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/30/2020] [Indexed: 12/16/2022]
Abstract
The development of a tracheal graft to replace long-segment defects has thwarted clinicians and engineers alike for over 100 years. To better understand the challenges facing this field today, we have consolidated all published reports of engineered tracheal grafts used to repair long-segment circumferential defects in humans, from the first in 1898 to the most recent in 2018, totaling 290 clinical cases. Distinct trends emerge in the types of grafts used over time, including repair using autologous fascia, rigid tubes of various inert materials, and pretreated cadaveric allografts. Our analysis of maximum clinical follow-up, as a proxy for graft performance, revealed that the Leuven protocol has a significantly longer clinical follow-up time than all other methods of airway reconstruction. This method involves transplanting a cadaveric tracheal allograft that is first prevascularized heterotopically in the recipient. We further quantified graft-related causes of mortality, revealing failure modes that have been resolved, and those that remain a hurdle, such as graft mechanics. Finally, we briefly summarize recent preclinical work in tracheal graft development. In conclusion, we synthesized top clinical care priorities and design criteria to inform and inspire collaboration between engineers and clinicians toward the development of a functional tracheal replacement graft. Impact statement The field of tracheal engineering has floundered in recent years due to multiple article retractions. However, with recent advances in biofabrication and tissue analysis techniques, the field remains ripe for advancement through collaboration between engineers and clinicians. With a long history of clinical application of tracheal replacements, engineered tracheas are arguably the regenerative technology with the greatest potential for translation. This work describes the many phases of engineered tracheal replacements that have been applied in human patients over the past 100 years with the goal of carrying forward critical lessons into development of the next generation of engineered tracheal graft.
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Affiliation(s)
- Allison M. Greaney
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
| | - Laura E. Niklason
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
- Department of Anesthesiology, Yale School of Medicine, New Haven, Connecticut, USA
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12
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Abstract
Hydrogels made from self-assembling peptides have significant advantages in tissue engineering, namely a biocompatible nature and large molecular repertoire. Short peptides in particular allow for straightforward synthesis, self-assembly, and reproducibility. Applications are currently limited, however, due to potential toxicity of the chemical modifications that drive self-assembly and harsh gelation conditions. Peptides conjugated to nucleobases present one opportunity for a naturally derived species to minimize cytotoxicity. We have developed a hydrogel-formation environment for nucleopeptide gelation modulated entirely by biological buffers and salts. Self-assembly in this system is dependent on buffer and ion identity mediated by pKa and formulation in the former and by valency and ionicity in the latter. Solutions at physiological pH and osmolarity, and in turn compatible with cell culture, initiate hydrogel formation and analytical and computational methods are used to explore pH and salt effects at the molecular and structural level. The mechanism of nucleopeptide self-assembly enables tuning of mechanical properties through the addition of divalent cations and one order of magnitude increase in hydrogel storage modulus. The stability of these constructs therefore provides an opportunity for long-term cell culture, and we demonstrate survival and proliferation of fibroblasts on hydrogel surfaces. This novel, biological buffer-mediated gelation methodology expands opportunities for tissue engineering applications of short peptides and their derivatives.
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Affiliation(s)
- Alexander David Noblett
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W. Dean Keeton Street, Austin, Texas 78712, United States
| | - Kiheon Baek
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W. Dean Keeton Street, Austin, Texas 78712, United States
| | - Laura J Suggs
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W. Dean Keeton Street, Austin, Texas 78712, United States
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13
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Wu YL, Szafron JM, Blum KM, Zbinden JC, Khosravi R, Best CA, Reinhardt JW, Zeng Q, Yi T, Shinoka T, Humphrey JD, Breuer CK, Wang Y. Electrospun Tissue-Engineered Arterial Graft Thickness Affects Long-Term Composition and Mechanics. Tissue Eng Part A 2020; 27:593-603. [PMID: 32854586 DOI: 10.1089/ten.tea.2020.0166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Wall stress is often lower in tissue-engineered constructs than in comparable native tissues due to the use of stiff polymeric materials having thicker walls. In this work, we sought to design a murine arterial graft having a more favorable local mechanical environment for the infiltrating cells; we used electrospinning to enclose a compliant inner core of poly(glycerol sebacate) with a stiffer sheath of poly(caprolactone) to reduce the potential for rupture. Two scaffolds were designed that differed in the thickness of the core as previous computational simulations found that circumferential wall stresses could be increased in the core toward native values by increasing the ratio of the core:sheath. Our modified electrospinning protocols reduced swelling of the core upon implantation and eliminated residual stresses in the sheath, both of which had contributed to the occlusion of implanted grafts during pilot studies. For both designs, a subset of implanted grafts occluded due to thrombosis or ruptured due to suspected point defects in the sheath. However, there were design-based differences in collagen content and mechanical behavior during early remodeling of the patent samples, with the thinner-core scaffolds having more collagen and a stiffer behavior after 12 weeks of implantation than the thicker-core scaffolds. By 24 weeks, the thicker-core scaffolds also became stiff, with similar amounts of collagen but increased smooth muscle cell and elastin content. These data suggest that increasing wall stress toward native values may provide a more favorable environment for normal arterial constituents to form despite the overall stiffness of the construct remaining elevated due to the absolute increase in load-bearing constituents.
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Affiliation(s)
- Yen-Lin Wu
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
| | - Jason M Szafron
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
| | - Kevin M Blum
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA.,Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Jacob C Zbinden
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA.,Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Ramak Khosravi
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
| | - Cameron A Best
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA.,Biomedical Sciences Graduate Program, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - James W Reinhardt
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Qiang Zeng
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Tai Yi
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Toshiharu Shinoka
- Department of Cardiothoracic Surgery, Nationwide Children's Hospital, Columbus, Ohio, USA.,Department of Surgery, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Jay D Humphrey
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA.,Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, Connecticut, USA
| | - Christopher K Breuer
- Center for Regenerative Medicine, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA.,Department of Cardiothoracic Surgery, Nationwide Children's Hospital, Columbus, Ohio, USA.,Department of Surgery, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Yadong Wang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
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14
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Moxon SR, Ferreira MJ, dos Santos P, Popa B, Gloria A, Katsarava R, Tugushi D, Serra AC, Hooper NM, Kimber SJ, Fonseca AC, Domingos MAN. A Preliminary Evaluation of the Pro-Chondrogenic Potential of 3D-Bioprinted Poly(ester Urea) Scaffolds. Polymers (Basel) 2020; 12:E1478. [PMID: 32630145 PMCID: PMC7408263 DOI: 10.3390/polym12071478] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 12/11/2022] Open
Abstract
Degeneration of articular cartilage (AC) is a common healthcare issue that can result in significantly impaired function and mobility for affected patients. The avascular nature of the tissue strongly burdens its regenerative capacity contributing to the development of more serious conditions such as osteoarthritis. Recent advances in bioprinting have prompted the development of alternative tissue engineering therapies for the generation of AC. Particular interest has been dedicated to scaffold-based strategies where 3D substrates are used to guide cellular function and tissue ingrowth. Despite its extensive use in bioprinting, the application of polycaprolactone (PCL) in AC is, however, restricted by properties that inhibit pro-chondrogenic cell phenotypes. This study proposes the use of a new bioprintable poly(ester urea) (PEU) material as an alternative to PCL for the generation of an in vitro model of early chondrogenesis. The polymer was successfully printed into 3D constructs displaying adequate substrate stiffness and increased hydrophilicity compared to PCL. Human chondrocytes cultured on the scaffolds exhibited higher cell viability and improved chondrogenic phenotype with upregulation of genes associated with type II collagen and aggrecan synthesis. Bioprinted PEU scaffolds could, therefore, provide a potential platform for the fabrication of bespoke, pro-chondrogenic tissue engineering constructs.
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Affiliation(s)
- Samuel R. Moxon
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PL, UK; (S.R.M.); (N.M.H.)
| | - Miguel J.S. Ferreira
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, UK; (M.J.S.F.); (B.P.)
| | - Patricia dos Santos
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Pólo II, 3030-790 Coimbra, Portugal; (P.d.S.); (A.C.S.)
| | - Bogdan Popa
- Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, UK; (M.J.S.F.); (B.P.)
| | - Antonio Gloria
- Institute of Polymers, Composites and Biomaterials—National Research Council of Italy, V.le J.F. Kennedy 54—Mostra d’Oltremare Pad. 20, 80125 Naples, Italy;
| | - Ramaz Katsarava
- Institute of Chemistry and Molecular Engineering, Agricultural University of Georgia, 240, David Aghmashenebeli Alley, Tbilisi 0159, Georgia; (R.K.); (D.T.)
| | - David Tugushi
- Institute of Chemistry and Molecular Engineering, Agricultural University of Georgia, 240, David Aghmashenebeli Alley, Tbilisi 0159, Georgia; (R.K.); (D.T.)
| | - Armenio C. Serra
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Pólo II, 3030-790 Coimbra, Portugal; (P.d.S.); (A.C.S.)
| | - Nigel M. Hooper
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PL, UK; (S.R.M.); (N.M.H.)
| | - Susan J. Kimber
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PL, UK;
| | - Ana C. Fonseca
- Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima-Pólo II, 3030-790 Coimbra, Portugal; (P.d.S.); (A.C.S.)
| | - Marco A. N. Domingos
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PL, UK;
- The Henry Royce Institute, The University of Manchester, Alan Turing Building, Oxford Road, Manchester M13 9PL, UK
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15
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Söhling N, Neijhoft J, Nienhaus V, Acker V, Harbig J, Menz F, Ochs J, Verboket RD, Ritz U, Blaeser A, Dörsam E, Frank J, Marzi I, Henrich D. 3D-Printing of Hierarchically Designed and Osteoconductive Bone Tissue Engineering Scaffolds. Materials (Basel) 2020; 13:E1836. [PMID: 32295064 DOI: 10.3390/ma13081836] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/28/2020] [Accepted: 04/08/2020] [Indexed: 12/12/2022]
Abstract
In Bone Tissue Engineering (BTE), autologous bone-regenerative cells are combined with a scaffold for large bone defect treatment (LBDT). Microporous, polylactic acid (PLA) scaffolds showed good healing results in small animals. However, transfer to large animal models is not easily achieved simply by upscaling the design. Increasing diffusion distances have a negative impact on cell survival and nutrition supply, leading to cell death and ultimately implant failure. Here, a novel scaffold architecture was designed to meet all requirements for an advanced bone substitute. Biofunctional, porous subunits in a load-bearing, compression-resistant frame structure characterize this approach. An open, macro- and microporous internal architecture (100 µm-2 mm pores) optimizes conditions for oxygen and nutrient supply to the implant's inner areas by diffusion. A prototype was 3D-printed applying Fused Filament Fabrication using PLA. After incubation with Saos-2 (Sarcoma osteogenic) cells for 14 days, cell morphology, cell distribution, cell survival (fluorescence microscopy and LDH-based cytotoxicity assay), metabolic activity (MTT test), and osteogenic gene expression were determined. The adherent cells showed colonization properties, proliferation potential, and osteogenic differentiation. The innovative design, with its porous structure, is a promising matrix for cell settlement and proliferation. The modular design allows easy upscaling and offers a solution for LBDT.
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16
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Huang J, Jiang Y, Ren Y, Liu Y, Wu X, Li Z, Ren J. Biomaterials and biosensors in intestinal organoid culture, a progress review. J Biomed Mater Res A 2020; 108:1501-1508. [PMID: 32170907 DOI: 10.1002/jbm.a.36921] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 02/24/2020] [Accepted: 03/09/2020] [Indexed: 12/17/2022]
Abstract
As an emerging technology, intestinal organoids are promising new tools for basic and translational research in gastroenterology. Currently, culture of intestinal organoids relies mostly on a type of tumor-derived scaffolds, namely Matrigel, which may pose tumorigenic risks to organoid implantation. Apart from the traditional detection methods, such as tissue slicing and fluorescence staining, the monitoring of intestinal organoids requires real-time biosensors that can adapt to their three-dimensional dynamic growth patterns. In this review, we summarized the recent advances in developing definite hydrogel scaffolds for intestinal organoid culture and identified key parameters for scaffold design. In addition, classified by different substrate compositions like pH, electrolytes, and functional proteins, we concluded the existing live-imaging biosensors and elucidated their underlying mechanisms. We hope this review enhances the understanding of intestinal organoid culture and provides more practical approaches to investigate them.
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Affiliation(s)
- Jinjian Huang
- School of Medicine, Southeast University, Nanjing, China.,Laboratory for Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, Nanjing, China
| | - Yungang Jiang
- School of Medicine, Southeast University, Nanjing, China.,Laboratory for Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, Nanjing, China
| | - Yanhan Ren
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois, USA
| | - Ye Liu
- School of Medicine, Southeast University, Nanjing, China.,Laboratory for Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, Nanjing, China
| | - Xiuwen Wu
- Laboratory for Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, Nanjing, China
| | - Zongan Li
- Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, NARI School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing, China
| | - Jianan Ren
- School of Medicine, Southeast University, Nanjing, China.,Laboratory for Trauma and Surgical Infections, Research Institute of General Surgery, Jinling Hospital, Nanjing, China
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17
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Schipani R, Nolan DR, Lally C, Kelly DJ. Integrating finite element modelling and 3D printing to engineer biomimetic polymeric scaffolds for tissue engineering. Connect Tissue Res 2020; 61:174-189. [PMID: 31495233 DOI: 10.1080/03008207.2019.1656720] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The suitability of a scaffold for tissue engineering is determined by a number of interrelated factors. The biomaterial should be biocompatible and cell instructive, with a porosity and pore interconnectivity that facilitates cellular migration and the transport of nutrients and waste products into and out of the scaffolds. For the engineering of load bearing tissues, the scaffold may also be required to possess specific mechanical properties and/or ensure the transfer of mechanical stimuli to cells to direct their differentiation. Achieving these design goals is challenging, but could potentially be realised by integrating computational tools such as finite element (FE) modelling with three-dimensional (3D) printing techniques to assess how scaffold architecture and material properties influence the performance of the implant. In this study we first use Fused Deposition Modelling (FDM) to modulate the architecture of polycaprolactone (PCL) scaffolds, exploring the influence of varying fibre diameter, spacing and laydown pattern on the structural and mechanical properties of such scaffolds. We next demonstrate that a simple FE modelling strategy, which captures key aspects of the printed scaffold's actual geometry and material behaviour, can be used to accurately model the mechanical characteristics of such scaffolds. We then show the utility of this strategy by using FE modelling to help design 3D printed scaffolds with mechanical properties mimicking that of articular cartilage. In conclusion, this study demonstrates that a relatively simple FE modelling approach can be used to inform the design of 3D printed scaffolds to ensure their bulk mechanical properties mimic specific target tissues.
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Affiliation(s)
- Rossana Schipani
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - David R Nolan
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Caitrίona Lally
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Daniel J Kelly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.,Department of Anatomy, Royal College of Surgeons in Ireland, Dublin, Ireland.,Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
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18
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Percoco G, Uva AE, Fiorentino M, Gattullo M, Manghisi VM, Boccaccio A. Mechanobiological Approach to Design and Optimize Bone Tissue Scaffolds 3D Printed with Fused Deposition Modeling: A Feasibility Study. Materials (Basel) 2020; 13:E648. [PMID: 32024158 PMCID: PMC7041376 DOI: 10.3390/ma13030648] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 01/20/2020] [Accepted: 01/28/2020] [Indexed: 12/11/2022]
Abstract
In spite of the rather large use of the fused deposition modeling (FDM) technique for the fabrication of scaffolds, no studies are reported in the literature that optimize the geometry of such scaffold types based on mechanobiological criteria. We implemented a mechanobiology-based optimization algorithm to determine the optimal distance between the strands in cylindrical scaffolds subjected to compression. The optimized scaffolds were then 3D printed with the FDM technique and successively measured. We found that the difference between the optimized distances and the average measured ones never exceeded 8.27% of the optimized distance. However, we found that large fabrication errors are made on the filament diameter when the filament diameter to be realized differs significantly with respect to the diameter of the nozzle utilized for the extrusion. This feasibility study demonstrated that the FDM technique is suitable to build accurate scaffold samples only in the cases where the strand diameter is close to the nozzle diameter. Conversely, when a large difference exists, large fabrication errors can be committed on the diameter of the filaments. In general, the scaffolds realized with the FDM technique were predicted to stimulate the formation of amounts of bone smaller than those that can be obtained with other regular beam-based scaffolds.
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Affiliation(s)
| | | | | | | | | | - Antonio Boccaccio
- Dipartimento di Meccanica, Matematica e Management, Politecnico di Bari, Via E. Orabona 4, 70126 Bari, Italy; (G.P.); (A.E.U.); (M.F.); (M.G.); (V.M.M.)
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19
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Hassan CR, Qin YX, Komatsu DE, Uddin SMZ. Utilization of Finite Element Analysis for Articular Cartilage Tissue Engineering. Materials (Basel) 2019; 12:E3331. [PMID: 31614845 PMCID: PMC6829543 DOI: 10.3390/ma12203331] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/02/2019] [Accepted: 10/08/2019] [Indexed: 01/22/2023]
Abstract
Scaffold design plays an essential role in tissue engineering of articular cartilage by providing the appropriate mechanical and biological environment for chondrocytes to proliferate and function. Optimization of scaffold design to generate tissue-engineered cartilage has traditionally been conducted using in-vitro and in-vivo models. Recent advances in computational analysis allow us to significantly decrease the time and cost of scaffold optimization using finite element analysis (FEA). FEA is an in-silico analysis technique that allows for scaffold design optimization by predicting mechanical responses of cells and scaffolds under applied loads. Finite element analyses can potentially mimic the morphology of cartilage using mesh elements (tetrahedral, hexahedral), material properties (elastic, hyperelastic, poroelastic, composite), physiological loads by applying loading conditions (static, dynamic), and constitutive stress-strain equations (linear, porous-elastic, biphasic). Furthermore, FEA can be applied to the study of the effects of dynamic loading, material properties cell differentiation, cell activity, scaffold structure optimization, and interstitial fluid flow, in isolated or combined multi-scale models. This review covers recent studies and trends in the use of FEA for cartilage tissue engineering and scaffold design.
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Affiliation(s)
- Chaudhry R Hassan
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794, USA.
| | - Yi-Xian Qin
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794, USA.
| | - David E Komatsu
- Department of Orthopaedics, Stony Brook University, Stony Brook, NY 11794, USA.
| | - Sardar M Z Uddin
- Department of Orthopaedics, Stony Brook University, Stony Brook, NY 11794, USA.
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20
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Shazeeb MS, Howes S, Kandasamy S, Peiris TB, Sotak CH, Pins GD. Developing quantitative MRI parameters to characterize host response and tissue ingrowth into collagen scaffolds. NMR Biomed 2019; 32:e4059. [PMID: 30657204 DOI: 10.1002/nbm.4059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
The in vivo evaluation of soft biomaterial implant remodeling routinely requires the surgical removal of the implant for subsequent histological assessment of tissue ingrowth and scaffold remodeling. This approach is very resource intensive, often destructive, and imposes practical limitations on how effectively these materials can be evaluated. MRI has the potential to non-invasively monitor the remodeling of implanted collagen scaffolds in real time. This study investigated the development of a model system to characterize the cellular infiltration, void area fraction, and angiogenesis in collagen scaffold implants using T2 relaxation time and apparent diffusion coefficient (ADC) maps along with conventional histological techniques. Initial correlations found statistically significant relationships between the MRI and histological parameters for various regions of the implanted sponges: T2 versus cell density (r ≈ -0.83); T2 versus void area fraction (r ≈ +0.78); T2 versus blood vessel density (r ≈ +0.95); ADC versus cell density (r ≈ -0.77); and ADC versus void area fraction (r ≈ +0.84). This suggests that MRI is sensitive to specific remodeling parameters and has the potential to serve as a non-invasive tool to monitor the remodeling of implanted collagen scaffolds, and to ultimately assess the ability of these scaffolds to regenerate the functional properties of damaged tissues such as tendons, ligaments, skin or skeletal muscle.
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Affiliation(s)
- Mohammed Salman Shazeeb
- Department of Radiology, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
| | - Stuart Howes
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
| | - Sivakumar Kandasamy
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
| | - Thelge Buddika Peiris
- Department of Mathematical Sciences, Worcester Polytechnic Institute, Worcester, MA, USA
| | - Christopher H Sotak
- Department of Radiology, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
- Department of Chemistry & Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA
| | - George D Pins
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
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21
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Cheng A, Schwartz Z, Kahn A, Li X, Shao Z, Sun M, Ao Y, Boyan BD, Chen H. Advances in Porous Scaffold Design for Bone and Cartilage Tissue Engineering and Regeneration. Tissue Eng Part B Rev 2019; 25:14-29. [PMID: 30079807 PMCID: PMC6388715 DOI: 10.1089/ten.teb.2018.0119] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 08/01/2018] [Indexed: 12/11/2022]
Abstract
IMPACT STATEMENT Challenges in musculoskeletal tissue regeneration affect millions of patients globally. Scaffolds for tissue engineering bone and cartilage provide promising solutions that increase healing and decrease need for complicated surgical procedures. Porous scaffolds have emerged as an attractive alternative to traditional scaffolds. However, the success of advanced materials, use of biological factors, and manufacturing techniques can vary depending on use case. This review provides perspective on porous scaffold manufacturing, characterization and application, and can be used to inform future scaffold design.
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Affiliation(s)
- Alice Cheng
- Department of Biomedical Engineering, Peking University, Beijing, China
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Zvi Schwartz
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia
- Department of Periodontology, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Adrian Kahn
- Department of Oral and Maxillofacial Surgery, University of Tel Aviv, Tel Aviv, Israel
| | - Xiyu Li
- Department of Biomedical Engineering, Peking University, Beijing, China
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Zhenxing Shao
- Institute of Sports Medicine, Peking University Third Hospital, Beijing, China
| | - Muyang Sun
- Department of Biomedical Engineering, Peking University, Beijing, China
| | - Yingfang Ao
- Institute of Sports Medicine, Peking University Third Hospital, Beijing, China
| | - Barbara D. Boyan
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia
| | - Haifeng Chen
- Department of Biomedical Engineering, Peking University, Beijing, China
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22
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Diaz-Gomez L, Smith BT, Kontoyiannis PD, Bittner SM, Melchiorri AJ, Mikos AG. Multimaterial Segmented Fiber Printing for Gradient Tissue Engineering. Tissue Eng Part C Methods 2019; 25:12-24. [PMID: 30421648 PMCID: PMC6352516 DOI: 10.1089/ten.tec.2018.0307] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 11/12/2018] [Indexed: 02/06/2023] Open
Abstract
IMPACT STATEMENT This study introduces a segmented three-dimensional printing methodology to create multimaterial porous scaffolds with discrete gradients and controlled distribution of compositions. This methodology can be adapted for the preparation of complex, multimaterial scaffolds with hierarchical structures and mechanical integrity useful in tissue engineering.
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Affiliation(s)
- Luis Diaz-Gomez
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, Texas
- Biomaterials Lab, Rice University, Houston, Texas
- NIH/NIBIB Center for Engineering Complex Tissues
| | - Brandon T. Smith
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, Texas
- Biomaterials Lab, Rice University, Houston, Texas
- NIH/NIBIB Center for Engineering Complex Tissues
- Medical Scientist Training Program, Baylor College of Medicine, Houston, Texas
| | - Panayiotis D. Kontoyiannis
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, Texas
- Biomaterials Lab, Rice University, Houston, Texas
- NIH/NIBIB Center for Engineering Complex Tissues
| | - Sean M. Bittner
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, Texas
- Biomaterials Lab, Rice University, Houston, Texas
- NIH/NIBIB Center for Engineering Complex Tissues
| | - Anthony J. Melchiorri
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, Texas
- Biomaterials Lab, Rice University, Houston, Texas
- NIH/NIBIB Center for Engineering Complex Tissues
| | - Antonios G. Mikos
- Department of Bioengineering, BioScience Research Collaborative, Rice University, Houston, Texas
- Biomaterials Lab, Rice University, Houston, Texas
- NIH/NIBIB Center for Engineering Complex Tissues
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23
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Hrynevich A, Elçi BŞ, Haigh JN, McMaster R, Youssef A, Blum C, Blunk T, Hochleitner G, Groll J, Dalton PD. Dimension-Based Design of Melt Electrowritten Scaffolds. Small 2018; 14:e1800232. [PMID: 29707891 DOI: 10.1002/smll.201800232] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/02/2018] [Indexed: 05/17/2023]
Abstract
The electrohydrodynamic stabilization of direct-written fluid jets is explored to design and manufacture tissue engineering scaffolds based on their desired fiber dimensions. It is demonstrated that melt electrowriting can fabricate a full spectrum of various fibers with discrete diameters (2-50 µm) using a single nozzle. This change in fiber diameter is digitally controlled by combining the mass flow rate to the nozzle with collector speed variations without changing the applied voltage. The greatest spectrum of fiber diameters was achieved by the simultaneous alteration of those parameters during printing. The highest placement accuracy could be achieved when maintaining the collector speed slightly above the critical translation speed. This permits the fabrication of medical-grade poly(ε-caprolactone) into complex multimodal and multiphasic scaffolds, using a single nozzle in a single print. This ability to control fiber diameter during printing opens new design opportunities for accurate scaffold fabrication for biomedical applications.
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Affiliation(s)
- Andrei Hrynevich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Bilge Ş Elçi
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Jodie N Haigh
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Rebecca McMaster
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital of Würzburg, Oberdürrbacher Str. 6, 97080, Würzburg, Germany
- Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, 4059, Kelvin Grove, Australia
| | - Almoatazbellah Youssef
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Carina Blum
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Torsten Blunk
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital of Würzburg, Oberdürrbacher Str. 6, 97080, Würzburg, Germany
| | - Gernot Hochleitner
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Paul D Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
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24
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Vijayavenkataraman S, Shuo Z, Fuh JYH, Lu WF. Design of Three-Dimensional Scaffolds with Tunable Matrix Stiffness for Directing Stem Cell Lineage Specification: An In Silico Study. Bioengineering (Basel) 2017; 4:E66. [PMID: 28952545 PMCID: PMC5615312 DOI: 10.3390/bioengineering4030066] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 07/24/2017] [Accepted: 07/25/2017] [Indexed: 12/22/2022] Open
Abstract
Tissue engineering is a multi-disciplinary area of research bringing together the fields of engineering and life sciences with the aim of fabricating tissue constructs aiding in the regeneration of damaged tissues and organs. Scaffolds play a key role in tissue engineering, acting as the templates for tissue regeneration and guiding the growth of new tissue. The use of stem cells in tissue engineering and regenerative medicine becomes indispensable, especially for applications involving successful long-term restoration of continuously self-renewing tissues, such as skin. The differentiation of stem cells is controlled by a number of cues, of which the nature of the substrate and its innate stiffness plays a vital role in stem cell fate determination. By tuning the substrate stiffness, the differentiation of stem cells can be directed to the desired lineage. Many studies on the effect of substrate stiffness on stem cell differentiation has been reported, but most of those studies are conducted with two-dimensional (2D) substrates. However, the native in vivo tissue microenvironment is three-dimensional (3D) and life science researchers are moving towards 3D cell cultures. Porous 3D scaffolds are widely used by the researchers for 3D cell culture and the properties of such scaffolds affects the cell attachment, proliferation, and differentiation. To this end, the design of porous scaffolds directly influences the stem cell fate determination. There exists a need to have 3D scaffolds with tunable stiffness for directing the differentiation of stem cells into the desired lineage. Given the limited number of biomaterials with all the desired properties, the design of the scaffolds themselves could be used to tune the matrix stiffness. This paper is an in silico study, investigating the effect of various scaffold parameter, namely fiber width, porosity, number of unit cells per layer, number of layers, and material selection, on the matrix stiffness, thereby offering a guideline for design of porous tissue engineering scaffolds with tunable matrix stiffness for directing stem cell lineage specification.
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Affiliation(s)
| | - Zhang Shuo
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117576, Singapore.
| | - Jerry Y H Fuh
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117576, Singapore.
- NUS Research Institute, Suzhou Industry Park, Suzhou 215123, China.
| | - Wen Feng Lu
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117576, Singapore.
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25
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Tenekecioglu E, Serruys PW, Onuma Y, Costa R, Chamié D, Sotomi Y, Yu TB, Abizaid A, Liew HB, Santoso T. Randomized Comparison of Absorb Bioresorbable Vascular Scaffold and Mirage Microfiber Sirolimus-Eluting Scaffold Using Multimodality Imaging. JACC Cardiovasc Interv 2017; 10:1115-1130. [PMID: 28527768 DOI: 10.1016/j.jcin.2017.03.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/10/2017] [Accepted: 03/09/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The primary objective of this study was to evaluate the safety and effectiveness of the Mirage (Manli Cardiology, Singapore) bioresorbable microfiber sirolimus-eluting scaffold compared with the Absorb (Abbott Vascular, Santa Clara, California) bioresorbable vascular scaffold in the treatment of stenotic target lesions located in native coronary arteries, ranging from ≥2.25 to ≤4.0 mm in diameter. Secondary objectives were to establish the medium-term safety, effectiveness, and performance of the Mirage device. BACKGROUND The current generation of bioresorbable scaffolds has several limitations, such as thick square struts with large footprints that preclude their deep embedment into the vessel wall, resulting in protrusion into the lumen with microdisturbance of flow. The Mirage sirolimus-eluting bioresorbable microfiber scaffold is designed to address these concerns. METHODS In this prospective, single-blind trial, 60 patients were randomly allocated in a 1:1 ratio to treatment with a Mirage sirolimus-eluting bioresorbable microfiber scaffold or an Absorb bioresorbable vascular scaffold. The clinical endpoints were assessed at 30 days and at 6 and 12 months. In-device angiographic late loss at 12 months was quantified. Secondary optical coherence tomographic endpoints were assessed post-scaffold implantation at 6 and 12 months. RESULTS Median angiographic post-procedural in-scaffold minimal luminal diameters of the Mirage and Absorb devices were 2.38 mm (interquartile range [IQR]: 2.06 to 2.62 mm) and 2.55 mm (IQR: 2.26 to 2.71 mm), respectively; the effect size (d) was -0.29. At 12 months, median angiographic in-scaffold minimal luminal diameters of the Mirage and Absorb devices were not statistically different (1.90 mm [IQR: 1.57 to 2.31 mm] vs. 2.29 mm [IQR: 1.74 to 2.51 mm], d = -0.36). At 12-month follow-up, median in-scaffold late luminal loss with the Mirage and Absorb devices was 0.37 mm (IQR: 0.08 to 0.72 mm) and 0.23 mm (IQR: 0.15 to 0.37 mm), respectively (d = 0.20). On optical coherence tomography, post-procedural diameter stenosis with the Mirage was 11.2 ± 7.1%, which increased to 27.4 ± 12.4% at 6 months and remained stable (31.8 ± 12.9%) at 1 year, whereas the post-procedural optical coherence tomographic diameter stenosis with the Absorb was 8.4 ± 6.6%, which increased to 16.6 ± 8.9% and remained stable (21.2 ± 9.9%) at 1-year follow-up (Mirage vs. Absorb: dpost-procedure = 0.41, d6 months = 1.00, d12 months = 0.92). Angiographic median in-scaffold diameter stenosis was significantly different between study groups at 12 months (28.6% [IQR: 21.0% to 40.7%] for the Mirage, 18.2% [IQR: 13.1% to 31.6%] for the Absorb, d = 0.39). Device- and patient-oriented composite endpoints were comparable between the 2 study groups. CONCLUSIONS At 12 months, angiographic in-scaffold late loss was not statistically different between the Mirage and Absorb devices, although diameter stenosis on angiography and on optical coherence tomography was significantly higher with the Mirage than with the Absorb. The technique of implantation was suboptimal for both devices, and future trials should incorporate optical coherence tomographic guidance to allow optimal implantation and appropriate assessment of the new technology, considering the novel mechanical properties of the Mirage.
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Affiliation(s)
- Erhan Tenekecioglu
- Department of Interventional Cardiology, Erasmus University Medical Center, Thoraxcenter, Rotterdam, the Netherlands
| | - Patrick W Serruys
- Department of Interventional Cardiology, Erasmus University Medical Center, Thoraxcenter, Rotterdam, the Netherlands; Department of Cardiology, Imperial College, London, United Kingdom.
| | - Yoshinobu Onuma
- Department of Interventional Cardiology, Erasmus University Medical Center, Thoraxcenter, Rotterdam, the Netherlands
| | - Ricardo Costa
- Department of Invasive Cardiology, Institute Dante Pazzanese of Cardiology, São Paulo, Brazil
| | - Daniel Chamié
- Department of Invasive Cardiology, Institute Dante Pazzanese of Cardiology, São Paulo, Brazil
| | - Yohei Sotomi
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | | | - Alexander Abizaid
- Department of Invasive Cardiology, Institute Dante Pazzanese of Cardiology, São Paulo, Brazil
| | - Houng-Bang Liew
- Department of Cardiology, Queen Elizabeth Hospital II, Sabah, Malaysia
| | - Teguh Santoso
- Department of Internal Medicine, Faculty of Medicine, Dr. Cipto Mangunkusumo and Medistra Hospitals, University of Indonesia, Jakarta, Indonesia
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26
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Corona-Gomez J, Chen X, Yang Q. Effect of Nanoparticle Incorporation and Surface Coating on Mechanical Properties of Bone Scaffolds: A Brief Review. J Funct Biomater 2016; 7:jfb7030018. [PMID: 27420104 PMCID: PMC5040991 DOI: 10.3390/jfb7030018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/27/2016] [Accepted: 07/01/2016] [Indexed: 11/16/2022] Open
Abstract
Mechanical properties of a scaffold play an important role in its in vivo performance in bone tissue engineering, due to the fact that implanted scaffolds are typically subjected to stress including compression, tension, torsion, and shearing. Unfortunately, not all the materials used to fabricate scaffolds are strong enough to mimic native bones. Extensive research has been conducted in order to increase scaffold strength and mechanical performance by incorporating nanoparticles and/or coatings. An incredible improvement has been achieved; and some outstanding examples are the usage of nanodiamond, hydroxyapatite, bioactive glass particles, SiO2, MgO, and silver nanoparticles. This review paper aims to present the results, to summarize significant findings, and to give perspective for future work, which could be beneficial to future bone tissue engineering.
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Affiliation(s)
- Jesus Corona-Gomez
- Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7H 5A9, Canada.
| | - Xiongbiao Chen
- Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7H 5A9, Canada.
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7H 5A9, Canada.
| | - Qiaoqin Yang
- Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7H 5A9, Canada.
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7H 5A9, Canada.
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27
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Abstract
BACKGROUND: Advances in rapid-prototyping and 3D printing technologies have enhanced the possibilities in preparing designed architectures for tissue engineering applications. A major advantage in custom designing is the ability to create structures with desired mechanical properties. While the behaviour of a designed scaffold can be simulated using bulk material properties, it is important to verify the behaviour of a printed scaffold at the microstructure level. OBJECTIVE: In this study we present an effective method in validating the mechanical behaviour of designed scaffolds using a μCT with an in-situ mechanical deformation device. METHODS: The scaffolds were prepared from biodegradable poly(trimethylene carbonate) (PTMC) by stereolithography and images obtained using a high-resolution μCT with 12.25μm isometric voxels. The data was processed (filtering, segmentation) and analysed (surface generation, registration) to extract relevant deformation features. RESULTS: The computed local deformation fields, calculated at sub-pore resolutions, displayed expected linear behaviour within the scaffold along the compressions axis. On planes perpendicular to this axis, the deformations varied by 150– 200μm. CONCLUSIONS: μCT based imaging with in-situ deformation provides a vital tool in validating the design parameters of printed scaffolds. Deformation fields obtained from micro-tomographic image volumes can serve to corroborate the simulated ideal design with the realized product.
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Affiliation(s)
- Nathaniel Narra
- Department of Electronics and Communications Engineering, Tampere University of Technology, BioMediTech Tampere, Finland
| | - Sébastien B G Blanquer
- Department of Biomaterials Science and Technology, University of Twente, Enschede, The Netherlands
| | - Suvi P Haimi
- Department of Biomaterials Science and Technology, University of Twente, Enschede, The Netherlands
| | - Dirk W Grijpma
- Department of Biomaterials Science and Technology, University of Twente, Enschede, The Netherlands
| | - Jari Hyttinen
- Department of Electronics and Communications Engineering, Tampere University of Technology, BioMediTech Tampere, Finland
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28
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Abstract
Numerous studies have focused on the optimization of ceramic architectures to fulfill a variety of scaffold functional requirements and improve biological response. Conventional fabrication techniques, however, do not allow for the production of geometrically controlled, reproducible structures and often fail to allow the independent variation of individual geometric parameters. Current developments in additive manufacturing technologies suggest that 3D printing will allow a more controlled and systematic exploration of scaffold architectures. This more direct translation of design into structure requires a pipeline for design-driven optimization. A theoretical framework for systematic design and evaluation of architectural parameters on biological response is presented. Four levels of architecture are considered, namely (1) surface topography, (2) pore size and geometry, (3) porous networks, and (4) macroscopic pore arrangement, including the potential for spatially varied architectures. Studies exploring the effect of various parameters within these levels are reviewed. This framework will hopefully allow uncovering of new relationships between architecture and biological response in a more systematic way as well as inform future refinement of fabrication techniques to fulfill architectural necessities with a consideration of biological implications.
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Affiliation(s)
- Maria Isabella Gariboldi
- Department of Materials Science and Metallurgy, Cambridge Centre for Medical Materials, University of Cambridge, Cambridge, UK
| | - Serena M. Best
- Department of Materials Science and Metallurgy, Cambridge Centre for Medical Materials, University of Cambridge, Cambridge, UK
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29
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Seo SJ, Mahapatra C, Singh RK, Knowles JC, Kim HW. Strategies for osteochondral repair: Focus on scaffolds. J Tissue Eng 2014; 5:2041731414541850. [PMID: 25343021 PMCID: PMC4206689 DOI: 10.1177/2041731414541850] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 06/06/2014] [Indexed: 01/27/2023] Open
Abstract
Interest in osteochondral repair has been increasing with the growing number of sports-related injuries, accident traumas, and congenital diseases and disorders. Although therapeutic interventions are entering an advanced stage, current surgical procedures are still in their infancy. Unlike other tissues, the osteochondral zone shows a high level of gradient and interfacial tissue organization between bone and cartilage, and thus has unique characteristics related to the ability to resist mechanical compression and restoration. Among the possible therapies, tissue engineering of osteochondral tissues has shown considerable promise where multiple approaches of utilizing cells, scaffolds, and signaling molecules have been pursued. This review focuses particularly on the importance of scaffold design and its role in the success of osteochondral tissue engineering. Biphasic and gradient composition with proper pore configurations are the basic design consideration for scaffolds. Surface modification is an essential technique to improve the scaffold function associated with cell regulation or delivery of signaling molecules. The use of functional scaffolds with a controllable delivery strategy of multiple signaling molecules is also considered a promising therapeutic approach. In this review, we updated the recent advances in scaffolding approaches for osteochondral tissue engineering.
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Affiliation(s)
- Seog-Jin Seo
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science, BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Chinmaya Mahapatra
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science, BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Rajendra K Singh
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science, BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Jonathan C Knowles
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, London, UK
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science, BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea ; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, Republic of Korea
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30
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Bitar KN, Zakhem E. Design strategies of biodegradable scaffolds for tissue regeneration. Biomed Eng Comput Biol 2014; 6:13-20. [PMID: 25288907 PMCID: PMC4147780 DOI: 10.4137/becb.s10961] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/07/2014] [Accepted: 04/08/2014] [Indexed: 02/07/2023] Open
Abstract
There are numerous available biodegradable materials that can be used as scaffolds in regenerative medicine. Currently, there is a huge emphasis on the designing phase of the scaffolds. Materials can be designed to have different properties in order to match the specific application. Modifying scaffolds enhances their bioactivity and improves the regeneration capacity. Modifications of the scaffolds can be later characterized using several tissue engineering tools. In addition to the material, cell source is an important component of the regeneration process. Modified materials must be able to support survival and growth of different cell types. Together, cells and modified biomaterials contribute to the remodeling of the engineered tissue, which affects its performance. This review focuses on the recent advancements in the designs of the scaffolds including the physical and chemical modifications. The last part of this review also discusses designing processes that involve viability of cells.
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Affiliation(s)
- Khalil N Bitar
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA. ; Department of Molecular Medicine and Translational Science, Wake Forest School of Medicine, Winston-Salem, NC, USA. ; Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston-Salem, NC, USA
| | - Elie Zakhem
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA. ; Department of Molecular Medicine and Translational Science, Wake Forest School of Medicine, Winston-Salem, NC, USA
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31
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Izadifar Z, Chen X, Kulyk W. Strategic design and fabrication of engineered scaffolds for articular cartilage repair. J Funct Biomater 2012; 3:799-838. [PMID: 24955748 PMCID: PMC4030923 DOI: 10.3390/jfb3040799] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/13/2012] [Accepted: 10/17/2012] [Indexed: 01/19/2023] Open
Abstract
Damage to articular cartilage can eventually lead to osteoarthritis (OA), a debilitating, degenerative joint disease that affects millions of people around the world. The limited natural healing ability of cartilage and the limitations of currently available therapies make treatment of cartilage defects a challenging clinical issue. Hopes have been raised for the repair of articular cartilage with the help of supportive structures, called scaffolds, created through tissue engineering (TE). Over the past two decades, different designs and fabrication techniques have been investigated for developing TE scaffolds suitable for the construction of transplantable artificial cartilage tissue substitutes. Advances in fabrication technologies now enable the strategic design of scaffolds with complex, biomimetic structures and properties. In particular, scaffolds with hybrid and/or biomimetic zonal designs have recently been developed for cartilage tissue engineering applications. This paper reviews critical aspects of the design of engineered scaffolds for articular cartilage repair as well as the available advanced fabrication techniques. In addition, recent studies on the design of hybrid and zonal scaffolds for use in cartilage tissue repair are highlighted.
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Affiliation(s)
- Zohreh Izadifar
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon SK S7N5A9, Canada.
| | - Xiongbiao Chen
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon SK S7N5A9, Canada.
| | - William Kulyk
- Department of Anatomy and Cell Biology, College of Medicine, University of Saskatchewan, 107 Wiggins Rd., Saskatoon SK S7N 5E5, Canada.
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