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Lin F, Itoh S, Fukuzawa K, Zhang H, Azuma N. Correlation between viscoelastic response and frictional properties of hydrated zwitterionic polymer brush film in narrowing shear gap. J Colloid Interface Sci 2024; 655:253-261. [PMID: 37944373 DOI: 10.1016/j.jcis.2023.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/28/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023]
Abstract
HYPOTHESIS A hydrated 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer brush exhibits exceptional lubricity. This lubrication mechanism has traditionally been attributed to either the inherent fluidity of the brush or the water film that forms owing to its hydrophilic nature. Given previous findings that the frictional properties of the MPC polymer brush film show load dependence, we hypothesize that the lubrication mechanism can be elucidated by examining the shear gap (varies owing to the load) dependence of the brush's viscoelastic response. EXPERIMENTS MPC polymer brush films with different thicknesses were prepared. Their viscoelastic responses were evaluated across different shear gap widths, and the frictional properties were subsequently compared across states with distinct viscoelastic behaviors. FINDINGS The observed shear viscoelasticity demonstrated a clear gap dependence that correlated with frictional attributes. Our data suggests that the lubrication mechanism shifts based on the shear gap. Specifically, two states exhibited low coefficients of friction: one where the osmotic pressure supports the load while allowing flexible deformation of the brush film, and the other where the brush film undergoes compression and transitions to a fully elastic state.
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Affiliation(s)
- Fengchang Lin
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, 464-8601, Japan
| | - Shintaro Itoh
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, 464-8601, Japan; PRESTO, Japan Science and Technology Agency, 102-0076, Japan.
| | - Kenji Fukuzawa
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, 464-8601, Japan
| | - Hedong Zhang
- Department of Complex Systems Science, Nagoya University, 464-8601, Japan
| | - Naoki Azuma
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, 464-8601, Japan; ACT-X, Japan Science and Technology Agency, 102-0076, Japan
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2
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Zhou Z, Liu J, Xiong T, Liu Y, Tuan RS, Li ZA. Engineering Innervated Musculoskeletal Tissues for Regenerative Orthopedics and Disease Modeling. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2310614. [PMID: 38200684 DOI: 10.1002/smll.202310614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/28/2023] [Indexed: 01/12/2024]
Abstract
Musculoskeletal (MSK) disorders significantly burden patients and society, resulting in high healthcare costs and productivity loss. These disorders are the leading cause of physical disability, and their prevalence is expected to increase as sedentary lifestyles become common and the global population of the elderly increases. Proper innervation is critical to maintaining MSK function, and nerve damage or dysfunction underlies various MSK disorders, underscoring the potential of restoring nerve function in MSK disorder treatment. However, most MSK tissue engineering strategies have overlooked the significance of innervation. This review first expounds upon innervation in the MSK system and its importance in maintaining MSK homeostasis and functions. This will be followed by strategies for engineering MSK tissues that induce post-implantation in situ innervation or are pre-innervated. Subsequently, research progress in modeling MSK disorders using innervated MSK organoids and organs-on-chips (OoCs) is analyzed. Finally, the future development of engineering innervated MSK tissues to treat MSK disorders and recapitulate disease mechanisms is discussed. This review provides valuable insights into the underlying principles, engineering methods, and applications of innervated MSK tissues, paving the way for the development of targeted, efficacious therapies for various MSK conditions.
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Affiliation(s)
- Zhilong Zhou
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Jun Liu
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
| | - Tiandi Xiong
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
| | - Yuwei Liu
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, 518000, P. R. China
| | - Rocky S Tuan
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Zhong Alan Li
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Key Laboratory of Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518057, P. R. China
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3
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Volova LT, Kotelnikov GP, Shishkovsky I, Volov DB, Ossina N, Ryabov NA, Komyagin AV, Kim YH, Alekseev DG. 3D Bioprinting of Hyaline Articular Cartilage: Biopolymers, Hydrogels, and Bioinks. Polymers (Basel) 2023; 15:2695. [PMID: 37376340 DOI: 10.3390/polym15122695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
The musculoskeletal system, consisting of bones and cartilage of various types, muscles, ligaments, and tendons, is the basis of the human body. However, many pathological conditions caused by aging, lifestyle, disease, or trauma can damage its elements and lead to severe disfunction and significant worsening in the quality of life. Due to its structure and function, articular (hyaline) cartilage is the most susceptible to damage. Articular cartilage is a non-vascular tissue with constrained self-regeneration capabilities. Additionally, treatment methods, which have proven efficacy in stopping its degradation and promoting regeneration, still do not exist. Conservative treatment and physical therapy only relieve the symptoms associated with cartilage destruction, and traditional surgical interventions to repair defects or endoprosthetics are not without serious drawbacks. Thus, articular cartilage damage remains an urgent and actual problem requiring the development of new treatment approaches. The emergence of biofabrication technologies, including three-dimensional (3D) bioprinting, at the end of the 20th century, allowed reconstructive interventions to get a second wind. Three-dimensional bioprinting creates volume constraints that mimic the structure and function of natural tissue due to the combinations of biomaterials, living cells, and signal molecules to create. In our case-hyaline cartilage. Several approaches to articular cartilage biofabrication have been developed to date, including the promising technology of 3D bioprinting. This review represents the main achievements of such research direction and describes the technological processes and the necessary biomaterials, cell cultures, and signal molecules. Special attention is given to the basic materials for 3D bioprinting-hydrogels and bioinks, as well as the biopolymers underlying the indicated products.
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Affiliation(s)
- Larisa T Volova
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
| | - Gennadiy P Kotelnikov
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
| | - Igor Shishkovsky
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia
| | - Dmitriy B Volov
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
| | - Natalya Ossina
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
| | - Nikolay A Ryabov
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
| | - Aleksey V Komyagin
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
| | - Yeon Ho Kim
- RokitHealth Care Ltd., 9, Digital-ro 10-gil, Geumcheon-gu, Seoul 08514, Republic of Korea
| | - Denis G Alekseev
- Research and Development Institute of Biotechnologies, Samara State Medical University, Chapayevskaya St. 89, 443099 Samara, Russia
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Hua Z, Hu M, Chen Y, Huang X, Gao L. Investigation of the Friction Properties of a New Artificial Imitation Cartilage Material: PHEMA/Glycerol Gel. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114023. [PMID: 37297157 DOI: 10.3390/ma16114023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/15/2023] [Accepted: 05/19/2023] [Indexed: 06/12/2023]
Abstract
The absence of artificial articular cartilage could cause the failure of artificial joints due to excessive material wear. There has been limited research on alternative materials for articular cartilage in joint prostheses, with few reducing the friction coefficient of artificial cartilage prostheses to the range of the natural cartilage friction coefficient (0.001-0.03). This work aimed to obtain and characterize mechanically and tribologically a new gel for potential application in articular replacement. Therefore, poly(hydroxyethyl methacrylate) (PHEMA)/glycerol synthetic gel was developed as a new type of artificial joint cartilage with a low friction coefficient, especially in calf serum. This glycerol material was developed via mixing HEMA and glycerin at a mass ratio of 1:1. The mechanical properties were studied, and it was found that the hardness of the synthetic gel was close to that of natural cartilage. The tribological performance of the synthetic gel was investigated using a reciprocating ball-on-plate rig. The ball samples were made of a cobalt-chromium-molybdenum (Co-Cr-Mo) alloy, and the plates were synthetic glycerol gel and two additional materials for comparison, which were ultra-high molecular polyethylene (UHMWPE) and 316L stainless steel. It was found that synthetic gel exhibited the lowest friction coefficient in both calf serum (0.018) and deionized water (0.039) compared to the other two conventional materials for knee prostheses. The surface roughness of the gel was found to be 4-5 μm through morphological analysis of wear. This newly proposed material provided a possible solution as a type of cartilage composite coating with hardness and tribological performance close to the nature of use in wear couples with artificial joints.
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Affiliation(s)
- Zikai Hua
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
| | - Mindie Hu
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
| | - Yiwen Chen
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
| | - Xiuling Huang
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
| | - Leiming Gao
- Department of Engineering, Nottingham Trent University, Nottingham NG1 4FQ, UK
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5
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Liu J, Yang L, Liu K, Gao F. Hydrogel scaffolds in bone regeneration: Their promising roles in angiogenesis. Front Pharmacol 2023; 14:1050954. [PMID: 36860296 PMCID: PMC9968752 DOI: 10.3389/fphar.2023.1050954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 02/03/2023] [Indexed: 02/16/2023] Open
Abstract
Bone tissue engineering (BTE) has become a hopeful potential treatment strategy for large bone defects, including bone tumors, trauma, and extensive fractures, where the self-healing property of bone cannot repair the defect. Bone tissue engineering is composed of three main elements: progenitor/stem cells, scaffold, and growth factors/biochemical cues. Among the various biomaterial scaffolds, hydrogels are broadly used in bone tissue engineering owing to their biocompatibility, controllable mechanical characteristics, osteoconductive, and osteoinductive properties. During bone tissue engineering, angiogenesis plays a central role in the failure or success of bone reconstruction via discarding wastes and providing oxygen, minerals, nutrients, and growth factors to the injured microenvironment. This review presents an overview of bone tissue engineering and its requirements, hydrogel structure and characterization, the applications of hydrogels in bone regeneration, and the promising roles of hydrogels in bone angiogenesis during bone tissue engineering.
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Affiliation(s)
- Jun Liu
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Lili Yang
- Department of Spinal Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Kexin Liu
- Department of Gastrointestinal Colorectal Surgery, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Feng Gao
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China,*Correspondence: Feng Gao,
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Oliveira AS, Silva JC, Loureiro MV, Marques AC, Kotov NA, Colaço R, Serro AP. Super-Strong Hydrogel Composites Reinforced with PBO Nanofibers for Cartilage Replacement. Macromol Biosci 2023; 23:e2200240. [PMID: 36443994 DOI: 10.1002/mabi.202200240] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 10/28/2022] [Indexed: 11/30/2022]
Abstract
Cartilage replacement materials exhibiting a set of demanding properties such as high water content, high mechanical stiffness, low friction, and excellent biocompatibility are quite difficult to achieve. Here, poly(p-phenylene-2,6-benzobisoxazole) (PBO) nanofibers are combined with polyvinyl alcohol (PVA) to form a super-strong structure with a performance that surpasses the vast majority of previously existing hydrogels. PVA-PBO composites with water contents in the 59-76% range exhibit tensile and compressive moduli reaching 20.3 and 4.5 MPa, respectively, and a coefficient of friction below 0.08. Further, they are biocompatible and support the viability of chondrocytes for 1 week, with significant improvements in cell adhesion, proliferation, and differentiation compared to PVA. The new composites can be safely sterilized by steam heat or gamma radiation without compromising their integrity and overall performance. In addition, they show potential to be used as local delivery platforms for anti-inflammatory drugs. These attractive features make PVA-PBO composites highly competitive engineered materials with remarkable potential for use in the design of load-bearing tissues. Complementary work has also revealed that these composites will be interesting alternatives in other industrial fields where high thermal and mechanical resistance are essential requirements, or which can take advantage of the pH responsiveness functionality.
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Affiliation(s)
- Andreia S Oliveira
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal.,Centro de Investigação Interdisciplinar Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, Caparica, 2829-511, Portugal.,Instituto de Engenharia Mecânica and Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal
| | - João C Silva
- Institute for Bioengineering and Biosciences and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal.,Associate Laboratory i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal.,Centre for Rapid and Sustainable Product Development, Politécnico de Leiria, Rua de Portugal-Zona Industrial, Marinha Grande, 2430-028, Portugal
| | - Mónica V Loureiro
- Centro de Recursos Naturais e Ambiente, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal
| | - Ana C Marques
- Centro de Recursos Naturais e Ambiente, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal
| | - Nicholas A Kotov
- Biointerfaces Institute, Department of Chemical Engineering, and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Rogério Colaço
- Instituto de Engenharia Mecânica and Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal
| | - Ana P Serro
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, Lisbon, 1049-001, Portugal.,Centro de Investigação Interdisciplinar Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, Caparica, 2829-511, Portugal
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7
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Kolosova OY, Shaikhaliev AI, Krasnov MS, Bondar IM, Sidorskii EV, Sorokina EV, Lozinsky VI. Cryostructuring of Polymeric Systems: 64. Preparation and Properties of Poly(vinyl alcohol)-Based Cryogels Loaded with Antimicrobial Drugs and Assessment of the Potential of Such Gel Materials to Perform as Gel Implants for the Treatment of Infected Wounds. Gels 2023; 9:gels9020113. [PMID: 36826283 PMCID: PMC9956285 DOI: 10.3390/gels9020113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 01/26/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023] Open
Abstract
Physical macroporous poly(vinyl alcohol)-based cryogels formed by the freeze-thaw technique without the use of any foreign cross-linkers are of significant interests for biomedical applications. In the present study, such gel materials loaded with the antimicrobial substances were prepared and their physicochemical properties were evaluated followed by an assessment of their potential to serve as drug carriers that can be used as implants for the treatment of infected wounds. The antibiotic Ceftriaxone and the antimycotic Fluconazole were used as antimicrobial agents. It was shown that the Ceftriaxone additives caused the up-swelling effects with respect to the cryogel matrix and some decrease in its heat endurance but did not result in a substantial change in the gel strength. With that, the drug release from the cryogel vehicle occurred without any diffusion restrictions, which was demonstrated by both the spectrophotometric recording and the microbiological agar diffusion technique. In turn, the in vivo biotesting of such drug-loaded cryogels also showed that these materials were able to function as rather efficient antimicrobial implants injected in the artificially infected model wounds of laboratory rabbits. These results confirmed the promising biomedical potential of similar implants.
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Affiliation(s)
- Olga Yu. Kolosova
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Bld. 1, 119334 Moscow, Russia
| | - Astemir I. Shaikhaliev
- Institute of Dentistry, I.M.Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
| | - Mikhail S. Krasnov
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Bld. 1, 119334 Moscow, Russia
| | - Ivan M. Bondar
- Institute of Dentistry, I.M.Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
| | - Egor V. Sidorskii
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Bld. 1, 119334 Moscow, Russia
| | - Elena V. Sorokina
- Microbiology Department, Biology Faculty, M.V.Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Vladimir I. Lozinsky
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Bld. 1, 119334 Moscow, Russia
- Microbiology Department, Kazan (Volga-Region) Federal University, 420008 Kazan, Russia
- Correspondence: ; Tel.: +7-499-135-6492
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Schuiringa GH, Pastrama M, Ito K, van Donkelaar CC. Towards a load bearing hydrogel: A proof of principle in the use of osmotic pressure for biomimetic cartilage constructs. J Mech Behav Biomed Mater 2023; 137:105552. [PMID: 36371992 DOI: 10.1016/j.jmbbm.2022.105552] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022]
Abstract
Cartilage defects occur frequently and can lead to osteoarthritis. Hydrogels are a promising regenerative strategy for treating such defects, using their ability of mimicking the native extracellular matrix. However, commonly used hydrogels for tissue regeneration are too soft to resist load-bearing in the joint. To overcome this, an implant is being developed in which the mechanical loadbearing function originates from the osmotic pressure generated by the swelling potential of a charged hydrogel, which is restricted from swelling by a textile spacer fabric. This study aims to quantify the relationship between the swelling potential of the hydrogel and the compressive stiffness of the implant.
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Affiliation(s)
- Gerke H Schuiringa
- Orthopaedic Biomechanics, Dept. Biomedical Engineering, Eindhoven University of Technology, the Netherlands
| | - Maria Pastrama
- Orthopaedic Biomechanics, Dept. Biomedical Engineering, Eindhoven University of Technology, the Netherlands
| | - Keita Ito
- Orthopaedic Biomechanics, Dept. Biomedical Engineering, Eindhoven University of Technology, the Netherlands
| | - Corrinus C van Donkelaar
- Orthopaedic Biomechanics, Dept. Biomedical Engineering, Eindhoven University of Technology, the Netherlands.
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Yadav N, Kumar U, Roopmani P, Krishnan UM, Sethuraman S, Chauhan MK, Chauhan VS. Ultrashort Peptide-Based Hydrogel for the Healing of Critical Bone Defects in Rabbits. ACS APPLIED MATERIALS & INTERFACES 2022; 14:54111-54126. [PMID: 36401830 DOI: 10.1021/acsami.2c18733] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The use of hydrogels as scaffolds for three-dimensional (3D) cell growth is an active area of research in tissue engineering. Herein, we report the self-assembly of an ultrashort peptide, a tetrapeptide, Asp-Leu-IIe-IIe, the shortest peptide sequence from a highly fibrillogenic protein TDP-43, into the hydrogel. The hydrogel was mechanically strong and highly stable, with storage modulus values in MPa ranges. The hydrogel supported the proliferation and successful differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) in its matrix as assessed by cell viability, calcium deposition, alkaline phosphatase (ALP) activity, and the expression of osteogenic marker gene studies. To check whether the hydrogel supports 3D growth and regeneration in in vivo conditions, a rabbit critical bone defect model was used. Micro-computed tomography (CT) and X-ray analysis demonstrated the formation of mineralized neobone in the defect areas, with significantly higher bone mineralization and relative bone densities in animals treated with the peptide hydrogel compared to nontreated and matrigel treatment groups. The ultrashort peptide-based hydrogel developed in this work holds great potential for its further development as tissue regeneration and/or engineering scaffolds.
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Affiliation(s)
- Nitin Yadav
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi110067, India
- Delhi Institute of Pharmaceutical Sciences and Research, Mehrauli-Badarpur Road, Sector-3, Pushpvihar, New Delhi110017, India
| | - Utkarsh Kumar
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi110067, India
| | - Purandhi Roopmani
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA's Hub for Research & Innovation (SHRI), School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur613401, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA's Hub for Research & Innovation (SHRI), School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur613401, India
| | - Swaminathan Sethuraman
- Centre for Nanotechnology & Advanced Biomaterials, SASTRA's Hub for Research & Innovation (SHRI), School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur613401, India
| | - Meenakshi K Chauhan
- Delhi Institute of Pharmaceutical Sciences and Research, Mehrauli-Badarpur Road, Sector-3, Pushpvihar, New Delhi110017, India
| | - Virander S Chauhan
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi110067, India
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10
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Damen AHA, Schuiringa GH, Ito K, van Donkelaar CC. The effect of HydroSpacer implant placement on the wear of opposing and adjacent cartilage. J Orthop Res 2022. [PMID: 36403126 DOI: 10.1002/jor.25487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/21/2022] [Accepted: 11/17/2022] [Indexed: 11/21/2022]
Abstract
A HydroSpacer implant, that is, a swelling hydrogel confined by a spacer fabric, was developed to repair focal cartilage defects and to prevent progression into osteoarthritis. The present study evaluated the effect of implant placement height in an osteochondral (OC) plug on wear of the opposing and adjacent cartilage. Three-dimensional warp-knitted spacer fabrics, polycaprolactone with poly(4-hydroxybutyrate) pile yarns, were filled with a hyaluronic acid methacrylate and chondroitin sulfate methacrylate hydrogel. After polymerization of the hydrogel, these HydroSpacers were implanted in OC defects (ø 6 mm) created in bovine OC plugs (ø 10 mm) and allowed to swell to equilibrium. A custom-made pin-on-plate wear apparatus was used to apply simultaneous compression and sliding against bovine cartilage. Cartilage damage, visualized with Indian ink, was only seen for the group in which the HydroSpacer was placed flush with the surrounding cartilage. A significant increase on average surface roughness of the sliding path compared to the adjacent cartilage confirmed surface damage for this group. When the implants were recessed (with and without extra hydrogel layer on top of the implant), this damage was not observed, but the cartilage surrounding the implants was compressed (without damage) indicating substantial load sharing with the implant. Furthermore, it was shown that all defects treated with a HydroSpacer implant resulted in shear forces comparable to intact cartilage. Clinical significance: The present study suggests that placing a HydroSpacer implant recessed into the surrounding cartilage would decrease wear of the opposing cartilage. Altogether, this study supports the development of textile-constraining hydrogels for cartilage replacement.
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Affiliation(s)
- Alicia H A Damen
- Department of Biomedical Engineering, Orthopaedic Biomechanics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Gerke H Schuiringa
- Department of Biomedical Engineering, Orthopaedic Biomechanics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Keita Ito
- Department of Biomedical Engineering, Orthopaedic Biomechanics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Corrinus C van Donkelaar
- Department of Biomedical Engineering, Orthopaedic Biomechanics, Eindhoven University of Technology, Eindhoven, The Netherlands
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11
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Composition controls soft hydrogel surface layer dimensions and contact mechanics. Biointerphases 2022; 17:061002. [DOI: 10.1116/6.0002047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Hydrogels are soft hydrated polymer networks that are widely used in research and industry due to their favorable properties and similarity to biological tissues. However, it has long been difficult to create a hydrogel emulating the heterogeneous structure of special tissues, such as cartilage. One potential avenue to develop a structural variation in a hydrogel is the “mold effect,” which has only recently been discovered to be caused by absorbed oxygen within the mold surface interfering with the polymerization. This induces a dilute gradient-density surface layer with altered properties. However, the precise structure of the gradient-surface layer and its contact response have not yet been characterized. Such knowledge would prove useful for designs of composite hydrogels with altered surface characteristics. To fully characterize the hydrogel gradient-surface layer, we created five hydrogel compositions of varying monomer and cross-linker content to encompass variations in the layer. Then, we used particle exclusion microscopy during indentation and creep experiments to probe the contact response of the gradient layer of each composition. These experiments showed that the dilute structure of the gradient layer follows evolving contact behavior allowing poroelastic squeeze-out at miniscule pressures. Stiffer compositions had thinner gradient layers. This knowledge can potentially be used to create hydrogels with a stiff load-bearing bulk with altered surface characteristics tailored for specific tribological applications.
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Alginate based hydrogel inks for 3D bioprinting of engineered orthopedic tissues. Carbohydr Polym 2022; 296:119964. [DOI: 10.1016/j.carbpol.2022.119964] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/17/2022] [Accepted: 08/04/2022] [Indexed: 12/27/2022]
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Sun D, Liu J, Xue L, Li L, Xie D, Li S, Li S, Wang X, Yin D, Ren Z, Bai R, Guo W, Liu Y, Chen C. A solid ultrasonic coupling membrane for superficial vascular ultrasonography. NANOSCALE 2022; 14:3545-3553. [PMID: 35174834 DOI: 10.1039/d1nr05353a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Superficial thrombophlebitis is one of the most significant complications of superficial vein thrombosis. Rapid imaging and mapping with high resolution is particularly important for accurate diagnosis so as to carry out treatment as soon as possible. Ultrasound imaging technology has been used extensively because of the low-cost, minimal invasiveness, and convenient application in clinical practice. And the ultrasonic couplant is an essential component in ultrasound examination. However, when imaging superficial structures, traditional liquid ultrasonic couplants often produce inadequate results. In this study, we investigate whether a hydrogel membrane can be used to improve the imaging of superficial vessels. To this end, we generated a polyacrylamide-bacterial nanocellulose hydrogel membrane (PAM-BC) that efficiently forms at 60 °C in only 10 min by redox polymerization. With PAM-BC-2.5, it was possible to acquire high resolution intravascular ultrasound images to assess superficial vessels in humans and the superficial vasculature in rats and miniature pigs using various brands of ultrasound instruments. The PAM-BCs represent a new, solid ultrasonic membrane which is suitable for diagnosing disease in superficial vessels.
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Affiliation(s)
- Di Sun
- GBA National Institute for Nanotechnology Innovation, Guangzhou, Guangdong 510700, P.R. China.
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
| | - Jie Liu
- Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China.
| | - Lijuan Xue
- Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China.
| | - Li Li
- Department of Ultrasound, Hospital of Renmin University of China, Beijing 100872, P.R. China
| | - Daoyin Xie
- Department of Echocardiography, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Shilin Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
| | - Shengmei Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
| | - Xinlian Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
| | - Dongtao Yin
- PLA Rocket Force Characteristics Medical Center, Beijing 100888, P.R. China
| | - Zhaoqi Ren
- PLA Rocket Force Characteristics Medical Center, Beijing 100888, P.R. China
| | - Ru Bai
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
| | - Wei Guo
- Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China.
| | - Ying Liu
- GBA National Institute for Nanotechnology Innovation, Guangzhou, Guangdong 510700, P.R. China.
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
| | - Chunying Chen
- GBA National Institute for Nanotechnology Innovation, Guangzhou, Guangdong 510700, P.R. China.
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China.
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3D Printing for Cartilage Replacement: A Preliminary Study to Explore New Polymers. Polymers (Basel) 2022; 14:polym14051044. [PMID: 35267866 PMCID: PMC8914867 DOI: 10.3390/polym14051044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 02/05/2023] Open
Abstract
The use of additive manufacturing technologies for biomedical applications must begin with the knowledge of the material to be used, by envisaging a very specific application rather than a more general aim. In this work, the preliminary study was focused on considering the cartilaginous tissue. This biological tissue exhibits different characteristics, such as thickness and mechanical properties, depending on its specific function in the body. Due to the lack of vascularization, cartilage is a supporting connective tissue with limited capacity for recovery and regeneration. For this reason, any approach, whether to repair/regenerate or as a total replacement, needs to fulfill the adequate mechanical and chemical properties of the surrounding native cartilage to be successful. This work aims to explore the possibility of using new polymers for cartilage total replacement approaches with polymeric materials processed with the specific 3D printing technique of fused filament fabrication (FFF). The materials studied were Nylon® 12 (PA12), already described for this purpose, and LAY-FOMM® 60 (FOMM). FOMM has not been described in the literature for biomedical purposes. Therefore, the chemical, thermal, swelling capacity, and mechanical properties of the filaments were thoroughly characterized to better understand the structure–properties–application relationships of this new polymer. In addition, as the FFF technology is temperature based, the properties were also evaluated in the printed specimens. Due to the envisaged application, the specimens were also characterized in the wet state. When comparing the obtained results with the properties of native cartilage, it was possible to conclude that: (i) PA12 exhibits low swelling capacity, while FOMM, in its dry and wet forms, has a higher swelling capacity, closer to that of native cartilage; (ii) the mechanical properties of the polymeric materials, especially PA12, are higher than those of native cartilage; and (iii) from the mechanical properties evaluated by ultra-micro hardness tests, the values for FOMM indicate that this material could be a good alternative for cartilage replacement in older patients. This preliminary study, essentially devoted to expanding the frontiers of the current state of the art of new polymeric materials, provides valuable indications for future work targeting the envisaged applications.
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Lin W, Klein J. Hydration Lubrication in Biomedical Applications: From Cartilage to Hydrogels. ACCOUNTS OF MATERIALS RESEARCH 2022; 3:213-223. [PMID: 35243350 PMCID: PMC8886567 DOI: 10.1021/accountsmr.1c00219] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/21/2022] [Indexed: 05/11/2023]
Abstract
In the course of evolution, nature has achieved remarkably lubricated surfaces, with healthy articular cartilage in the major (synovial) joints being the prime example, that can last a lifetime as they slide past each other with ultralow friction (friction coefficient μ = the force to slide surfaces past each other/load compressing the surfaces < 0.01) under physiological pressures (up to 10 MPa or more)). Such properties are unmatched by any man-made materials. The precise mechanism of low friction between such sliding cartilage tissues, which is closely related to osteoarthritis (OA), the most widespread joint disease, affecting hundreds of millions worldwide, has been studied for nearly a century, but is still not fully understood. Traditionally, the roles of load bearing by interstitial fluid within the cartilage bulk and that of thin exuded fluid films at the interface between the sliding cartilage surfaces have been proposed as the main lubrication mechanism. More recent work, however, suggests that molecular boundary layers at the surfaces of articular cartilage and other tissues play a major role in their lubrication. In particular, in recent years hydration lubrication has emerged as a new paradigm for boundary lubrication in aqueous media based on subnanometer hydration shells which massively reduce frictional dissipation. The vectors of hydration lubrication include trapped hydrated ions, hydrated surfactants, biological macromolecules, biomimetic polymers, polyelectrolytes and polyzwitterionic brushes, and close-packed layers of phosphatidylcholine (PC) vesicles, all having in common the exposure of highly hydrated groups at the slip plane. Among them, vesicles (or bilayers) of PC lipids, which are the most widespread lipid class in mammals, are exceptionally efficient lubricating elements as a result of the high hydration of the phosphocholine headgroups they expose. Such lipids are ubiquitous in joints, leading to the proposal that macromolecular surface complexes exposing PC bilayers are responsible for the remarkable lubrication of cartilage. Cartilage, comprising ∼70% water, may be considered to be a complex biological hydrogel, and studying the frictional properties of hydrogels may thus provide new insights into its lubrication mechanisms, leading in turn to novel, highly lubricious hydrogels that may be used in a variety of biomedical and other applications. A better understanding of cartilage lubrication could moreover lead to better treatments for OA, for example, through intra-articular injections of appropriate lubricants or through the creation of low-friction hydrogels that may be used as tissue engineering scaffolds for diseased cartilage. In this Account, we begin by introducing the concept and origin of hydration lubrication, extending from the seminal study of lubrication by hydrated simple ions to more complex systems. We then briefly review different modes of lubrication in synovial joints, focusing primarily on boundary lubrication. We consider modes of hydrogel lubrication and different kinds of such low-friction synthetic gels and then focus on cartilage-inspired, boundary-lubricated hydrogels. We conclude by discussing challenges and opportunities.
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Li M, Pan G, Zhang H, Guo B. Hydrogel adhesives for generalized wound treatment: Design and applications. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210916] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Meng Li
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an China
| | - Guoying Pan
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an China
| | - Hualei Zhang
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an China
| | - Baolin Guo
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an China
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of Stomatology, Xi'an Jiaotong University Xi'an China
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Del Prado-Audelo ML, Caballero-Florán IH, Mendoza-Muñoz N, Giraldo-Gomez D, Sharifi-Rad J, Patra JK, González-Torres M, Florán B, Cortes H, Leyva-Gómez G. Current progress of self-healing polymers for medical applications in tissue engineering. IRANIAN POLYMER JOURNAL 2022. [DOI: 10.1007/s13726-021-00943-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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18
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Filiz Y, Saglam-Metiner P, Ersoy S, Yesil-Celiktas O. Supercritical carbon dioxide dried double layer laponite XLS and alginate/polyacrylamide construct and immune response. Tissue Cell 2021; 74:101712. [PMID: 34920234 DOI: 10.1016/j.tice.2021.101712] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/17/2021] [Accepted: 12/07/2021] [Indexed: 11/25/2022]
Abstract
Fabrication of immunocompatible tissue constructs for bone-cartilage defect regeneration is of prime importance. In this study, a double layer hydrogel was successfully synthesized, where alginate/polyacrylamide were formulated to represent cartilage layer (5-10 % (w/w) total polymer ratio) and laponite XLS (2-5-8% (w/w))/alginate/polyacrylamide formed bone layer. Hydrogels were dried by supercritical CO2 at 100 and 200 bar, 45 °C, 5 g/min CO2 flow rate for 2 h. Constructs were treated with collagen, then cellularized and embedded in cell-laden GelMA to mimic the cellular microenvironment. The optimum weight ratio of alginate/polyacrylamide:laponite XLS was 10:5 based on mechanical strength test results. The constructs yielded high porosity (91.50 m2/g) and mesoporous structure, owing to the diffusivity of CO2 at 200 bar (0.49 × 10-7 m2/s). Constructs were then treated with collagen to increase cell adhesion and ATDC5 cells were seeded in the cartilage layer, whereas hFOB cells to the bone layer. About 10-15 % higher cell viability was attained. The porous structure of the construct allowed infiltration of macrophages, promoted polarization and positively affected the behavior of macrophages, yielding a decrease in M1 markers, whereas an increase in M2 on day 4. The formulated tissue constructs would be of value in tissue engineering applications.
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Affiliation(s)
- Yagmur Filiz
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Izmir, Turkey
| | - Pelin Saglam-Metiner
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Izmir, Turkey
| | - Seymanur Ersoy
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Izmir, Turkey
| | - Ozlem Yesil-Celiktas
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Izmir, Turkey.
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Stampoultzis T, Karami P, Pioletti DP. Thoughts on cartilage tissue engineering: A 21st century perspective. Curr Res Transl Med 2021; 69:103299. [PMID: 34192658 DOI: 10.1016/j.retram.2021.103299] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 04/11/2021] [Accepted: 05/26/2021] [Indexed: 12/15/2022]
Abstract
In mature individuals, hyaline cartilage demonstrates a poor intrinsic capacity for repair, thus even minor defects could result in progressive degeneration, impeding quality of life. Although numerous attempts have been made over the past years for the advancement of effective treatments, significant challenges still remain regarding the translation of in vitro cartilage engineering strategies from bench to bedside. This paper reviews the latest concepts on engineering cartilage tissue in view of biomaterial scaffolds, tissue biofabrication, mechanobiology, as well as preclinical studies in different animal models. The current work is not meant to provide a methodical review, rather a perspective of where the field is currently focusing and what are the requirements for bridging the gap between laboratory-based research and clinical applications, in light of the current state-of-the-art literature. While remarkable progress has been accomplished over the last 20 years, the current sophisticated strategies have reached their limit to further enhance healthcare outcomes. Considering a clinical aspect together with expertise in mechanobiology, biomaterial science and biofabrication methods, will aid to deal with the current challenges and will present a milestone for the furtherance of functional cartilage engineering.
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Affiliation(s)
| | - Peyman Karami
- Laboratory of Biomechanical Orthopedics, EPFL, Lausanne, Switzerland.
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20
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Youssef D, Hassab-Elnaby S, El-Ghandoor H. Nanoscale quantitative surface roughness measurement of articular cartilage using second-order statistical-based biospeckle. PLoS One 2021; 16:e0246395. [PMID: 33513197 PMCID: PMC7845957 DOI: 10.1371/journal.pone.0246395] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 01/17/2021] [Indexed: 11/19/2022] Open
Abstract
Quantitative measurement of nanoscale surface roughness of articular cartilage tissue is significant to assess the surface topography for early treatment of osteoarthritis, the most common joint disease worldwide. Since it was not established by clinical diagnostic tools, the current studies have been suggesting the use of alternative diagnostic tools using pre-clinical methods. This study aims to measure the nanoscale surface roughness of articular cartilage tissue utilizing biospeckle which is used as a non-destructive and non-contact optical imaging technique. An experimental setup was implemented to capture biospeckle images from twelve cross-section areas of articular cartilage tissue gathered from bovine knee joints at 632 nm wavelength laser radiation. Then, to analyze the biospeckle image, a second-order statistical-based method was proposed through the combination of 308 highly correlated statistical features extracted from implemented gray-level co-occurrence matrices by employing principal component analysis. The result indicated that the measurement of the nanoscale surface roughness based on the first principal component only is able to provide accurate and precise quantitative measurement of early signs of articular cartilage degeneration up to 2500 nm.
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Affiliation(s)
- Doaa Youssef
- Department of Engineering Applications of Laser, National Institute of Laser Enhanced Science, Cairo University, Giza, Egypt
- * E-mail:
| | - Salah Hassab-Elnaby
- Department of Engineering Applications of Laser, National Institute of Laser Enhanced Science, Cairo University, Giza, Egypt
| | - Hatem El-Ghandoor
- Faculty of Science, Department of Physics, Ain Shams University, Cairo, Egypt
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21
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Affatato S, Trucco D, Taddei P, Vannozzi L, Ricotti L, Nessim GD, Lisignoli G. Wear Behavior Characterization of Hydrogels Constructs for Cartilage Tissue Replacement. MATERIALS (BASEL, SWITZERLAND) 2021; 14:428. [PMID: 33467142 PMCID: PMC7830039 DOI: 10.3390/ma14020428] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/12/2021] [Accepted: 01/12/2021] [Indexed: 02/07/2023]
Abstract
This paper aims to characterize the wear behavior of hydrogel constructs designed for human articular cartilage replacement. To this purpose, poly (ethylene glycol) diacrylate (PEGDA) 10% w/v and gellan gum (GG) 1.5% w/v were used to reproduce the superior (SUP) cartilage layer and PEGDA 15% w/v and GG 1.5% w/v were used to reproduce the deep (DEEP) cartilage layer, with or without graphene oxide (GO). These materials (SUP and DEEP) were analyzed alone and in combination to mimic the zonal architecture of human articular cartilage. The developed constructs were tested using a four-station displacement control knee joint simulator under bovine calf serum. Roughness and micro-computer tomography (µ-CT) measurements evidenced that the hydrogels with 10% w/v of PEGDA showed a worse behavior both in terms of roughness increase and loss of uniformly distributed density than 15% w/v of PEGDA. The simultaneous presence of GO and 15% w/v PEGDA contributed to keeping the hydrogel construct's characteristics. The Raman spectra of the control samples showed the presence of unreacted C=C bonds in all the hydrogels. The degree of crosslinking increased along the series SUP < DEEP + SUP < DEEP without GO. The Raman spectra of the tested hydrogels showed the loss of diacrylate groups in all the samples, due to the washout of unreacted PEGDA in bovine calf serum aqueous environment. The loss decreased along the series SUP > DEEP + SUP > DEEP, further confirming that the degree of photo-crosslinking of the starting materials plays a key role in determining their wear behavior. μ-CT and Raman spectroscopy proved to be suitable techniques to characterize the structure and composition of hydrogels.
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Affiliation(s)
- Saverio Affatato
- IRCSS Istituto Ortopedico Rizzoli, Laboratorio di Tecnologia Medica, 40136 Bologna, Italy
| | - Diego Trucco
- IRCSS Istituto Ortopedico Rizzoli, SC Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, 40136 Bologna, Italy; (D.T.); (G.L.)
- The BioRobotics Institute, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy; (L.V.); (L.R.)
- Department of Excellence in Robotics & AI, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Paola Taddei
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy;
| | - Lorenzo Vannozzi
- The BioRobotics Institute, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy; (L.V.); (L.R.)
- Department of Excellence in Robotics & AI, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy; (L.V.); (L.R.)
- Department of Excellence in Robotics & AI, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Gilbert Daniel Nessim
- Department of Chemistry, Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 52900, Israel;
| | - Gina Lisignoli
- IRCSS Istituto Ortopedico Rizzoli, SC Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, 40136 Bologna, Italy; (D.T.); (G.L.)
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Michel SES, Rogers SE, Briscoe WH, Galan MC. Tunable Thiol-Ene Photo-Cross-Linked Chitosan-Based Hydrogels for Biomedical Applications. ACS APPLIED BIO MATERIALS 2020; 3:8075-8083. [PMID: 35019547 DOI: 10.1021/acsabm.0c01171] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Access to biocompatible hydrogels with tunable properties is of great interest in biomedical applications. Here we report the synthesis and characterization of a series of photo-cross-linked chitosan hydrogels from norbornene-functionalized chitosan (CS-nb) and various thiolated cross-linkers. The resulting materials were characterized by NMR, swelling ratio, rheology, SEM, and small angle neutron scattering (SANS) measurements. The hydrogels exhibited pH- and salt-dependent swelling, while the macro- and microscale properties could be modulated by the choice and degree of cross-linker or the polymer concentration. The materials could be molded in situ and loaded with small molecules that can be released overtime. Moreover, the incorporation of collagen in the hydrogels drastically improved cell adhesion, with excellent viabilities of human dermofibroblast cells on the hydrogels observed for up to 6 days, highlighting the potential use of these materials in the biomedical area.
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Affiliation(s)
- Sarah E S Michel
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K
| | - Sarah E Rogers
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, OX11 0QX, U.K
| | - Wuge H Briscoe
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K
| | - M Carmen Galan
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K
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Lozinsky VI. Cryostructuring of Polymeric Systems. 55. Retrospective View on the More than 40 Years of Studies Performed in the A.N.Nesmeyanov Institute of Organoelement Compounds with Respect of the Cryostructuring Processes in Polymeric Systems. Gels 2020; 6:E29. [PMID: 32927850 PMCID: PMC7559272 DOI: 10.3390/gels6030029] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 02/06/2023] Open
Abstract
The processes of cryostructuring in polymeric systems, the techniques of the preparation of diverse cryogels and cryostructurates, the physico-chemical mechanisms of their formation, and the applied potential of these advanced polymer materials are all of high scientific and practical interest in many countries. This review article describes and discusses the results of more than 40 years of studies in this field performed by the researchers from the A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences-one of the key centers, where such investigations are carried out. The review includes brief historical information, the description of the main effects and trends characteristic of the cryostructuring processes, the data on the morphological specifics inherent in the polymeric cryogels and cryostructurates, and examples of their implementation for solving certain applied tasks.
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Affiliation(s)
- Vladimir I Lozinsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street, 28, 119991 Moscow, Russia
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Frassica MT, Grunlan MA. Perspectives on Synthetic Materials to Guide Tissue Regeneration for Osteochondral Defect Repair. ACS Biomater Sci Eng 2020; 6:4324-4336. [PMID: 33455185 DOI: 10.1021/acsbiomaterials.0c00753] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Regenerative engineering holds the potential to treat clinically pervasive osteochondral defects (OCDs). In a synthetic materials-guided approach, the scaffold's chemical and physical properties alone instruct cellular behavior in order to effect regeneration, referred to herein as "instructive" properties. While this alleviates the costs and off-target risks associated with exogenous growth factors, the scaffold must be potently instructive to achieve tissue growth. Moreover, toward achieving functionality, such a scaffold should also recapitulate the spatial complexity of the osteochondral tissues. Thus, in addition to the regeneration of the articular cartilage and underlying cancellous bone, the complex osteochondral interface, composed of calcified cartilage and subchondral bone, should also be restored. In this Perspective, we highlight recent synthetic-based, instructive osteochondral scaffolds that have leveraged new material chemistries as well as innovative fabrication strategies. In particular, scaffolds with spatially complex chemical and morphological features have been prepared with electrospinning, solvent-casting-particulate-leaching, freeze-drying, and additive manufacturing. While few synthetic scaffolds have advanced to clinical studies to treat OCDs, these recent efforts point to the promising use of the chemical and physical properties of synthetic materials for regeneration of osteochondral tissues.
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Affiliation(s)
- Michael T Frassica
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-2120, United States
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-2120, United States.,Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843-3003, United States.,Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
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25
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Tough and Low Friction Polyvinyl Alcohol Hydrogels Loaded with Anti-inflammatories for Cartilage Replacement. LUBRICANTS 2020. [DOI: 10.3390/lubricants8030036] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The development of new materials that mimic cartilage and its function is an unmet need that will allow replacing the damaged parts of the joints, instead of the whole joint. Polyvinyl alcohol (PVA) hydrogels have raised special interest for this application due to their biocompatibility, high swelling capacity and chemical stability. In this work, the effect of post-processing treatments (annealing, high hydrostatic pressure (HHP) and gamma-radiation) on the performance of PVA gels obtained by cast-drying was investigated and, their ability to be used as delivery vehicles of the anti-inflammatories diclofenac or ketorolac was evaluated. HHP damaged the hydrogels, breaking some bonds in the polymeric matrix, and therefore led to poor mechanical and tribological properties. The remaining treatments, in general, improved the performance of the materials, increasing their crystallinity. Annealing at 150 °C generated the best mechanical and tribological results: higher resistance to compressive and tensile loads, lower friction coefficients and ability to support higher loads in sliding movement. This material was loaded with the anti-inflammatories, both without and with vitamin E (Vit.E) or Vit.E + cetalkonium chloride (CKC). Vit.E + CKC helped to control the release of the drugs which occurred in 24 h. The material did not induce irritability or cytotoxicity and, therefore, shows high potential to be used in cartilage replacement with a therapeutic effect in the immediate postoperative period.
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Shoaib T, Espinosa-Marzal RM. Influence of Loading Conditions and Temperature on Static Friction and Contact Aging of Hydrogels with Modulated Microstructures. ACS APPLIED MATERIALS & INTERFACES 2019; 11:42722-42733. [PMID: 31623436 DOI: 10.1021/acsami.9b14283] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Biological tribosystems enable diverse functions of the human body by maintaining extremely low coefficients of friction via hydrogel-like surface layers and a water-based lubricant. Although stiction has been proposed as a precursor to damage, there is still a lack of knowledge about its origin and its relation to the hydrogel's microstructure, which impairs the design of soft matter as replacement biomaterials. In this work, the static friction of poly(acrylamide) hydrogels with modulated composition was investigated by colloidal probe lateral force microscopy as a function of load, temperature, and loading time. Temperature-dependent studies enable to build a phase diagram for hydrogel's static friction, which explains stiction via (polymer) viscoelastic and poroelastic relaxation, and a subtle transition from solid- to liquid-like interfacial behavior. At room temperature, the static friction increases with loading time, a phenomenon called contact aging, which stems from the adhesion of the polymer to the colloid and from the drainage-induced increase in contact area. Contact aging is shown to gradually vanish with increase in temperature, but this behavior strongly depends on the hydrogel's composition. This work scrutinizes the relation between the microstructure of hydrogel-like soft matter and interfacial behavior, with implications for diverse areas of inquiry, not only in biolubrication and biomedical applications but also in soft robotics and microelectromechanical devices, where the processes occurring at the migrating hydrogel interface are of relevance. The results support that modulating both the hydrogel's mesh size and the structure of the near-surface region is a means to control static friction and adhesion. This conceptual framework for static friction will foster further understanding of the wear of hydrogel-like materials.
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Affiliation(s)
- Tooba Shoaib
- The Materials Science and Engineering , University of Illinois at Urbana-Champaign , 1304 W Green Street , Urbana , Illinois 61801 , United States
| | - Rosa M Espinosa-Marzal
- Civil and Environmental Engineering , University of Illinois at Urbana-Champaign , 205 N. Matthews Avenue , Urbana , Illinois 61801 , United States
- The Materials Science and Engineering , University of Illinois at Urbana-Champaign , 1304 W Green Street , Urbana , Illinois 61801 , United States
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Aslanli A, Stepanov N, Razheva T, Podorozhko EA, Lyagin I, Lozinsky VI, Efremenko E. Enzymatically Functionalized Composite Materials Based on Nanocellulose and Poly(Vinyl Alcohol) Cryogel and Possessing Antimicrobial Activity. MATERIALS 2019; 12:ma12213619. [PMID: 31689944 PMCID: PMC6862455 DOI: 10.3390/ma12213619] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/28/2019] [Accepted: 10/31/2019] [Indexed: 12/16/2022]
Abstract
In the present work, innovative composite biomaterials possessing bactericidal properties and based on the hexahistidine-tagged organophosphorus hydrolase (His6-OPH) entrapped in the poly(vinyl alcohol) cryogel (PVA-CG)/bacterial cellulose (BC) were developed. His6-OPH possesses lactonase activity, with a number of N-acyl homoserine lactones being the inducers of Gram-negative bacterial resistance. The enzyme can also be combined with various antimicrobial agents (antibiotics and antimicrobial peptides) to improve the efficiency of their action. In this study, such an effect was shown for composite biomaterials when His6-OPH was entrapped in PVA-CG/BC together with β-lactam antibiotic meropenem or antimicrobial peptides temporin A and indolicidin. The residual catalytic activity of immobilized His6-OPH was 60% or more in all the composite samples. In addition, the presence of BC filler in the PVA-CG composite resulted in a considerable increase in the mechanical strength and heat endurance of the polymeric carrier compared to the BC-free cryogel matrix. Such enzyme-containing composites could be interesting in the biomedical field to help overcome the problem of antibiotic resistance of pathogenic microorganisms.
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Affiliation(s)
- Aysel Aslanli
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Nikolay Stepanov
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- N.M.Emanuel Institute of Biochemical Physics RAS, Moscow 119334, Russia.
| | - Tatyana Razheva
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119334, Russia.
| | - Elena A Podorozhko
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119334, Russia.
| | - Ilya Lyagin
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- N.M.Emanuel Institute of Biochemical Physics RAS, Moscow 119334, Russia.
| | - Vladimir I Lozinsky
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119334, Russia.
| | - Elena Efremenko
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- N.M.Emanuel Institute of Biochemical Physics RAS, Moscow 119334, Russia.
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Huang KT, Ishihara K, Huang CJ. Polyelectrolyte and Antipolyelectrolyte Effects for Dual Salt-Responsive Interpenetrating Network Hydrogels. Biomacromolecules 2019; 20:3524-3534. [DOI: 10.1021/acs.biomac.9b00796] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Kang-Ting Huang
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Chun-Jen Huang
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, 200 Chung Pei Rd., Chung-Li City 32023, Taiwan
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Means AK, Shrode CS, Whitney LV, Ehrhardt DA, Grunlan MA. Double Network Hydrogels that Mimic the Modulus, Strength, and Lubricity of Cartilage. Biomacromolecules 2019; 20:2034-2042. [DOI: 10.1021/acs.biomac.9b00237] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- A. Kristen Means
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843-3003 United States
| | - Courtney S. Shrode
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120 United States
| | - Lauren V. Whitney
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120 United States
| | - Daniel A. Ehrhardt
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120 United States
| | - Melissa A. Grunlan
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843-3003 United States
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843-3120 United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3120 United States
- Center for Remote Health Technologies Systems, Texas A&M University, College Station, Texas 77843-3120 United States
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Tolba E, Wang X, Ackermann M, Neufurth M, Muñoz‐Espí R, Schröder HC, Müller WEG. In Situ Polyphosphate Nanoparticle Formation in Hybrid Poly(vinyl alcohol)/Karaya Gum Hydrogels: A Porous Scaffold Inducing Infiltration of Mesenchymal Stem Cells. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801452. [PMID: 30693187 PMCID: PMC6343068 DOI: 10.1002/advs.201801452] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/16/2018] [Indexed: 04/14/2023]
Abstract
The preparation and characterization of a porous hybrid cryogel based on the two organic polymers, poly(vinyl alcohol) (PVA) and karaya gum (KG), into which polyphosphate (polyP) nanoparticles have been incorporated, are described. The PVA/KG cryogel is prepared by intermolecular cross-linking of PVA via freeze-thawing and Ca2+-mediated ionic gelation of KG to form stable salt bridges. The incorporation of polyP as amorphous nanoparticles with Ca2+ ions (Ca-polyP-NP) is achieved using an in situ approach. The polyP constituent does not significantly affect the viscoelastic properties of the PVA/KG cryogel that are comparable to natural soft tissue. The exposure of the Ca-polyP-NP within the cryogel to medium/serum allows the formation of a biologically active polyP coacervate/protein matrix that stimulates the growth of human mesenchymal stem cells in vitro and provides the cells a suitable matrix for infiltration superior to the polyP-free cryogel. In vivo biocompatibility studies in rats reveal that already two to four weeks after implantation into muscle, the implant regions containing the polyP-KG/PVA material become replaced by initial granulation tissue, whereas the controls are free of any cells. It is proposed that the polyP-KG/PVA cryogel has the potential to become a promising implant material for soft tissue engineering/repair.
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Affiliation(s)
- Emad Tolba
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological ChemistryUniversity Medical Center of the Johannes Gutenberg UniversityDuesbergweg 655128MainzGermany
- Polymers and Pigments DepartmentNational Research CentreDokki12622GizaEgypt
| | - Xiaohong Wang
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological ChemistryUniversity Medical Center of the Johannes Gutenberg UniversityDuesbergweg 655128MainzGermany
| | - Maximilian Ackermann
- Institute of Functional and Clinical AnatomyUniversity Medical Center of the Johannes Gutenberg UniversityJohann Joachim Becher Weg 1355099MainzGermany
| | - Meik Neufurth
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological ChemistryUniversity Medical Center of the Johannes Gutenberg UniversityDuesbergweg 655128MainzGermany
| | - Rafael Muñoz‐Espí
- Institute of Materials Science (ICMUV)Universitat de ValènciaC/Catedràtic José Beltrán 246980PaternaValènciaSpain
| | - Heinz C. Schröder
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological ChemistryUniversity Medical Center of the Johannes Gutenberg UniversityDuesbergweg 655128MainzGermany
| | - Werner E. G. Müller
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological ChemistryUniversity Medical Center of the Johannes Gutenberg UniversityDuesbergweg 655128MainzGermany
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Pipino G, Risitano S, Alviano F, WU EJ, Bonsi L, Vaccarisi DC, Indelli PF. Microfractures and hydrogel scaffolds in the treatment of osteochondral knee defects: A clinical and histological evaluation. J Clin Orthop Trauma 2019; 10:67-75. [PMID: 30705535 PMCID: PMC6349629 DOI: 10.1016/j.jcot.2018.03.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/20/2018] [Accepted: 03/01/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Osteochondral knee defects (OCD) are often symptomatic, causing pain and functional impairment even in young and active patients. Regenerative surgical options, aiming to stimulate natural cartilage healing, have been recently used as a first line treatment. In this study, a new hydrogel is investigated in its capacity to regenerate the ultra-structural quality of hyaline cartilage when combined with a classical microfracture technique. MATERIAL AND METHODS Forty-six patients, affected by grade III and IV knee chondropathies, were consecutively treated between 2013 and 2015 with microfractures followed by application of a modern hydrogel in the lesion site. All patients underwent clinical evaluation (WOMAC) pre-operatively, at 6,12 and at 24 months postoperatively: the results were compared with a subsequent, consecutive, matched, control group of 23 patients treated with microfractures alone. In a parallel and separate in-vitro histological study, adipose derived mesenchymal stem cells (ADMSCs) were encapsulated in the hydrogel scaffold, induced to differentiation into chondrocytes, and observed for a 3 weeks period. RESULTS The initial WOMAC score of 58.6 ± 11.0 in the study group was reduced by 88% at 6 months (7.1 ± 9.2) and 95% at 24 months (2.9 ± 5.9). The "in-vitro" study revealed a histological characterization typical of hyaline cartilage in study group. Separate biopsies performed at 12 months post-op in the study group also revealed type 2 collagen and hyaline-like cartilage in the regenerated tissue. CONCLUSION Our study demonstrated high patient satisfaction rates after microfractures combined with a modern hydrogel scaffold; histologic evaluation supported the hypothesis of creating an enhanced chondrogenic environment. Microfracture "augmentation" using modern acellular biomaterials, like hydrogels, might improve the clinical outcomes of this classical bone marrow stimulating procedure.
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Key Words
- ACI, autologous chondrocyte implantation
- AMIC, Autologous Matrix Induced Chondrogenesis
- ASCs, adipose mesenchymal stem cells
- Arthroscopic
- BMI, body mass index
- BMS, bone marrow stem cells
- BMS, bone marrow stimulation
- Cartilage
- Hydrogels
- Knee
- MACI, mixed-assisted chondrocyte implantation
- Microfractures
- OAT, osteochondral autograft transfer
- OCA, Osteochondral allograft transplantation
- OCD
- OCD, osteochondral defect
- Osteochondral defect
- PG/GC, polyglucosamine/glucosamine carbonate
- Scaffold
- WOMAC, (Western Ontario and McMaster Universities Osteoarthritis Index)
- hASCs, Human adipose-derived stromal/stem cells
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Affiliation(s)
- Gennaro Pipino
- Faculty of Medical Sciences, LUdeS HEI Malta Campus Lugano, Switzerland
| | - Salvatore Risitano
- Dept. Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA
| | - Francesco Alviano
- University of Bologna School of Medicine, Department of Histology, Bologna, Italy
| | - Edward J. WU
- Dept. Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA
| | - Laura Bonsi
- University of Bologna School of Medicine, Department of Histology, Bologna, Italy
| | | | - Pier Francesco Indelli
- Dept. Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA,Corresponding author at: Department of Orthopaedic Surgery and Bioengineering Stanford University School of Medicine PAVAHCS – Surgical services 1801 Miranda Ave, Palo Alto CA 94304, USA.
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Cryostructuring of Polymeric Systems. 49. Unexpected "Kosmotropic-Like" Impact of Organic Chaotropes on Freeze⁻Thaw-Induced Gelation of PVA in DMSO. Gels 2018; 4:gels4040081. [PMID: 30674857 PMCID: PMC6318644 DOI: 10.3390/gels4040081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/03/2018] [Accepted: 10/04/2018] [Indexed: 12/13/2022] Open
Abstract
Urea (URE) and guanidine hydrochloride (GHC) possessing strong chaotropic properties in aqueous media were added to DMSO solutions of poly(vinyl alcohol) (PVA) to be gelled via freeze⁻thaw processing. Unexpectedly, it turned out that in the case of the PVA cryotropic gel formation in DMSO medium, the URE and GHC additives caused the opposite effects to those observed in water, i.e., the formation of the PVA cryogels (PVACGs) was strengthened rather than inhibited. Our studies of this phenomenon showed that such "kosmotropic-like" effects were more pronounced for the PVACGs that were formed in DMSO in the presence of URE additives, with the effects being concentration-dependent. The additives also caused significant changes in the macroporous morphology of the cryogels; the commonly observed trend was a decrease in the structural regularity of the additive-containing samples compared to the additive-free gel sample. The viscosity measurements revealed consistent changes in the intrinsic viscosity, Huggins constant, and the excess activation heat of the viscosity caused by the additives. The results obtained evidently point to the urea-induced decrease in the solvation ability of DMSO with respect to PVA. As a result, this effect can be the key factor that is responsible for strengthening the structure formation upon the freeze⁻thaw gelation of this polymer in DMSO additionally containing additives such as urea, which is capable of competing with PVA for the solvent.
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Enrione J, Blaker JJ, Brown DI, Weinstein-Oppenheimer CR, Pepczynska M, Olguín Y, Sánchez E, Acevedo CA. Edible Scaffolds Based on Non-Mammalian Biopolymers for Myoblast Growth. MATERIALS 2017; 10:ma10121404. [PMID: 29292759 PMCID: PMC5744339 DOI: 10.3390/ma10121404] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 12/03/2017] [Accepted: 12/05/2017] [Indexed: 01/06/2023]
Abstract
In vitro meat has recently emerged as a new concept in food biotechnology. Methods to produce in vitro meat generally involve the growth of muscle cells that are cultured on scaffolds using bioreactors. Suitable scaffold design and manufacture are critical to downstream culture and meat production. Most current scaffolds are based on mammalian-derived biomaterials, the use of which is counter to the desire to obviate mammal slaughter in artificial meat production. Consequently, most of the knowledge is related to the design and control of scaffold properties based on these mammalian-sourced materials. To address this, four different scaffold materials were formulated using non-mammalian sources, namely, salmon gelatin, alginate, and additives including gelling agents and plasticizers. The scaffolds were produced using a freeze-drying process, and the physical, mechanical, and biological properties of the scaffolds were evaluated. The most promising scaffolds were produced from salmon gelatin, alginate, agarose, and glycerol, which exhibited relatively large pore sizes (~200 μm diameter) and biocompatibility, permitting myoblast cell adhesion (~40%) and growth (~24 h duplication time). The biodegradation profiles of the scaffolds were followed, and were observed to be less than 25% after 4 weeks. The scaffolds enabled suitable myogenic response, with high cell proliferation, viability, and adequate cell distribution throughout. This system composed of non-mammalian edible scaffold material and muscle-cells is promising for the production of in vitro meat.
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Affiliation(s)
- Javier Enrione
- Biopolymer Research and Engineering Lab (BiopREL), Universidad de los Andes, Avenida Monseñor Alvaro del Portillo 12455, Las Condes, Santiago 7550000, Chile.
| | - Jonny J Blaker
- Bio-Active Materials Group, School of Materials, MSS Tower, The University of Manchester, Manchester M13 9PL, UK.
| | - Donald I Brown
- Laboratorio de Biología de la Reproducción y del Desarrollo, Instituto de Biología, Facultad de Ciencias, Universidad de Valparaíso, Avenida Gran Bretaña 1111, Valparaíso 2340000, Chile.
| | - Caroline R Weinstein-Oppenheimer
- Escuela de Química y Farmacia, Facultad de Farmacia, Universidad de Valparaíso, Avenida Gran Bretaña 1093, Valparaíso 2340000, Chile.
| | - Marzena Pepczynska
- Biopolymer Research and Engineering Lab (BiopREL), Universidad de los Andes, Avenida Monseñor Alvaro del Portillo 12455, Las Condes, Santiago 7550000, Chile.
| | - Yusser Olguín
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andrés Bello, Echaurren 183, Santiago 8320000, Chile.
| | - Elizabeth Sánchez
- Centro de Biotecnología, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2340000, Chile.
| | - Cristian A Acevedo
- Centro de Biotecnología, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2340000, Chile.
- Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2340000, Chile.
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