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Lysenkov E, Klepko V, Bulavin L, Lebovka N. Physico-Chemical Properties of Laponite®/Polyethylene-oxide Based Composites. CHEM REC 2024; 24:e202300166. [PMID: 37387571 DOI: 10.1002/tcr.202300166] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/05/2023] [Indexed: 07/01/2023]
Abstract
This review aims to provide a literature overview as well as the authors' personal account to the studies of Laponite® (Lap)/Polyethylene-oxide (PEO) based composite materials and their applications. These composites can be prepared over a wide range of their mutual concentrations, they are highly water soluble, and have many useful physico-chemical properties. To the readers' convenience, the contents are subdivided into different sections, related with consideration of PEO properties and its solubility in water, behavior of Lap systems(structure of Lap-platelets, properties of aqueous dispersions of Lap and aging effects in them), analyzing ofproperties LAP/PEO systems, Lap platelets-PEO interactions, adsorption mechanisms, aging effects, aggregation and electrokinetic properties. The different applications of Lap/PEO composites are reviewed. These applications include Lap/PEO based electrolytes for lithium polymer batteries, electrospun nanofibers, environmental, biomedical and biotechnology engineering. Both Lap and PEO are highly biocompatible with living systems and they are non-toxic, non-yellowing, and non-inflammable. Medical applications of Lap/PEO composites in bio-sensing, tissue engineering, drug delivery, cell proliferation, and wound dressings are also discussed.
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Affiliation(s)
- Eduard Lysenkov
- Petro Mohyla Black Sea National University, Mykolaiv, Ukraine
| | - Valery Klepko
- Institute of Macromolecular Chemistry, Kyiv, Ukraine
| | - Leonid Bulavin
- Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Nikolai Lebovka
- Institute of Biocolloidal Chemistry named after F. D. Ovcharenko, Kyiv, Ukraine
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2
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Morariu S, Brunchi CE, Honciuc M, Iftime MM. Development of Hybrid Materials Based on Chitosan, Poly(Ethylene Glycol) and Laponite ® RD: Effect of Clay Concentration. Polymers (Basel) 2023; 15:polym15040841. [PMID: 36850125 PMCID: PMC9959284 DOI: 10.3390/polym15040841] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
In the context of increasing interest in biomaterials with applicability in cosmetics and medicine, this research aims to obtain and characterize some hybrid materials based on chitosan (CS) (antibacterial, biocompatible, and biodegradable), poly(ethylene glycol) (PEG) (non-toxic and prevents the adsorption of protein and cell) and Laponite® RD (Lap) (bioactive). The rheological properties of the starting dispersions were investigated and discussed related to the interactions developed between components. All samples exhibited gel-like properties, and the storage modulus of CS/PEG dispersion increased from 6.6 Pa to 657.7 Pa by adding 2.5% Lap. Structural and morphological characterization of the films, prepared by solution casting method, was performed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and polarized light microscopy (POM). These analyses proved the incorporation of Lap into CS/PEG films and revealed the morphological changes of the films by the addition of clay. Thereby, at the highest Lap concentration (43.8%), the "house of cards" structure formed by Lap platelets, which incorporate chitosan chains, as evidenced by SEM and POM. Two stages of degradation between 200 °C and 410 °C were evidenced for the films with Lap concentration higher than 38.5%, explained by the existence of a clay-rich phase (given by the clay network) and chitosan-rich one (due to the intercalation of chitosan in the clay network). CS/PEG film with 43.8% Lap showed the highest swelling degree of 240.7%. The analysis of the obtained results led to the conclusion that the addition of clay to the CS/PEG films increases their stability in water and gives them greater thermal stability.
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The evaluation of prepared microstructure pattern by carbon-dioxide laser on zirconia-based ceramics for dental implant application: an in vitro study. Odontology 2022:10.1007/s10266-022-00781-x. [DOI: 10.1007/s10266-022-00781-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 11/12/2022] [Indexed: 12/24/2022]
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4
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van der Heide D, Cidonio G, Stoddart M, D'Este M. 3D printing of inorganic-biopolymer composites for bone regeneration. Biofabrication 2022; 14. [PMID: 36007496 DOI: 10.1088/1758-5090/ac8cb2] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 08/25/2022] [Indexed: 11/12/2022]
Abstract
In most cases, bone injuries heal without complications, however, there is an increasing number of instances where bone healing needs major clinical intervention. Available treatment options have severe drawbacks, such as donor site morbidity and limited availability for autografting. Bone graft substitutes containing growth factors would be a viable alternative, however they have been associated with dose-related safety concerns and lack control over spatial architecture to anatomically match bone defect sites. 3D printing offers a solution to produce patient specific bone graft substitutes that are customized to the patient bone defect with temporal control over the incorporated therapeutics to maximize their efficacy. Inspired by the natural constitution of bone tissue, composites made of inorganic phases, such as nanosilicate particles, calcium phosphate, and bioactive glasses, combined with biopolymer matrices have been investigated as building blocks for the biofabrication of bone constructs. Besides capturing elements of the bone physiological structure, these inorganic/organic composites can be designed for specific cohesivity, rheological and mechanical properties, while both inorganic and organic constituents contribute to the composite bioactivity. This review provides an overview of 3D printed composite biomaterial-inks for bone tissue engineering. Furthermore, key aspects in biomaterial-ink design, 3D printing techniques, and the building blocks for composite biomaterial-inks are summarized.
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Affiliation(s)
- Daphne van der Heide
- AO Research Institute Davos, Clavadelerstrasse, 8, Davos Platz, Davos, Graubünden, 7270, SWITZERLAND
| | - Gianluca Cidonio
- Istituto Italiano di Tecnologia Center for Life Nano Science, 3D Microfluidic Biofabrication Laboratory, Roma, Lazio, 00161, ITALY
| | - Martin Stoddart
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Davos, Graubünden, 7270, SWITZERLAND
| | - Matteo D'Este
- AO Research Institute Davos, Clavadelerstrasse 8, Davos, Graubünden, 7270, SWITZERLAND
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Chen TC, Wong CW, Hsu SH. Three-dimensional printing of chitosan cryogel as injectable and shape recoverable scaffolds. Carbohydr Polym 2022; 285:119228. [DOI: 10.1016/j.carbpol.2022.119228] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 12/07/2021] [Accepted: 02/03/2022] [Indexed: 12/26/2022]
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6
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Kiaee G, Dimitrakakis N, Sharifzadeh S, Kim HJ, Avery RK, Moghaddam KM, Haghniaz R, Yalcintas EP, Barros NRD, Karamikamkar S, Libanori A, Khademhosseini A, Khoshakhlagh P. Laponite-Based Nanomaterials for Drug Delivery. Adv Healthc Mater 2022; 11:e2102054. [PMID: 34990081 PMCID: PMC8986590 DOI: 10.1002/adhm.202102054] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/29/2021] [Indexed: 11/09/2022]
Abstract
Laponite is a clay-based material composed of synthetic disk-shaped crystalline nanoparticles with highly ionic, large surface area. These characteristics enable the intercalation and dissolution of biomolecules in Laponite-based drug delivery systems. Furthermore, Laponite's innate physicochemical properties and architecture enable the development of tunable pH-responsive drug delivery systems. Laponite's coagulation capacity and cation exchangeability determine its exchange capabilities, drug encapsulation efficiency, and release profile. These parameters are exploited to design highly controlled and efficacious drug delivery platforms for sustained drug release. In this review, they provide an overview of how to design efficient delivery of therapeutics by leveraging the properties and specific interactions of various Laponite-polymer composites and drug moieties.
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Affiliation(s)
- Gita Kiaee
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA, 02115, USA
| | - Nikolaos Dimitrakakis
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA, 02115, USA
| | | | - Han-Jun Kim
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90024, USA
| | - Reginald K Avery
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA, 02115, USA
| | | | - Reihaneh Haghniaz
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90024, USA
| | | | | | | | - Alberto Libanori
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90024, USA
| | - Parastoo Khoshakhlagh
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA, 02115, USA
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7
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Xu X, Zhuo J, Xiao L, Xu Y, Yang X, Li Y, Du Z, Luo K. Nanosilicate-Functionalized Polycaprolactone Orchestrates Osteogenesis and Osteoblast-Induced Multicellular Interactions for Potential Endogenous Vascularized Bone Regeneration. Macromol Biosci 2021; 22:e2100265. [PMID: 34705332 DOI: 10.1002/mabi.202100265] [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: 07/06/2021] [Revised: 10/22/2021] [Indexed: 11/07/2022]
Abstract
Massive oral and maxillofacial bone defect regeneration remains a major clinical challenge due to the absence of functionalized bone grafts with ideal mechanical and proregeneration properties. In the present study, Laponite (LAP), a synthetic nanosilicate, is incorporated into polycaprolactone (PCL) to develop a biomaterial for bone regeneration. It is explored whether LAP-embedded PCL would accelerate bone regeneration by orchestrating osteoblasts to directly and indirectly induce bone regeneration processes. The results confirmed the presence of LAP in PCL, and LAP is distributed in the exfoliated structure without aggregates. Incorporation of LAP in PCL slightly improved the compressive properties. LAP-embedded PCL is biocompatible and exerts pronounced enhancements in cell viability, osteogenic differentiation, and extracellular matrix formation of osteoblasts. Furthermore, osteoblasts cultured on LAP-embedded PCL facilitate angiogenesis of vessel endothelial cells and alleviate osteoclastogenesis of osteoclasts in a paracrine manner. The addition of LAP to the PCL endows favorable bone formation in vivo. Based upon these results, LAP-embedded PCL shows great potential as an ideal bone graft that exerts both space-maintaining and vascularized bone regeneration synergistic effects and can be envisioned for oral and maxillofacial bone defect regeneration.
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Affiliation(s)
- Xiongcheng Xu
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China.,Institute of Stomatology & Laboratory of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China
| | - Jin Zhuo
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China.,Institute of Stomatology & Laboratory of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China
| | - Long Xiao
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China.,Institute of Stomatology & Laboratory of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China
| | - Yanmei Xu
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China.,Institute of Stomatology & Laboratory of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China
| | - Xue Yang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China.,Institute of Stomatology & Laboratory of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China
| | - Yanfen Li
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Zhibin Du
- School of Mechanical, Medical, and Process Engineering, Queensland University of Technology, Brisbane, 4059, Australia
| | - Kai Luo
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China.,Institute of Stomatology & Laboratory of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350002, China
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Motealleh A, Kehr NS. Step‐Gradient Composite Hydrogels for Local Drug Delivery and Directed Cell Migration. ADVANCED NANOBIOMED RESEARCH 2021. [DOI: 10.1002/anbr.202000114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Andisheh Motealleh
- Physikalisches Institute and Center for Soft Nanoscience Westfälische Wilhelms-Universität Münster Busso-Peus-Strasse 10 Münster 48149 Germany
| | - Nermin S. Kehr
- Physikalisches Institute and Center for Soft Nanoscience Westfälische Wilhelms-Universität Münster Busso-Peus-Strasse 10 Münster 48149 Germany
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9
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3D printed step‐gradient composite hydrogels for directed migration and osteogenic differentiation of human bone marrow‐derived mesenchymal stem cells. NANO SELECT 2021. [DOI: 10.1002/nano.202100113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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10
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Bio-multifunctional noncovalent porphyrin functionalized carbon-based nanocomposite. Sci Rep 2021; 11:6604. [PMID: 33758300 PMCID: PMC7988124 DOI: 10.1038/s41598-021-86119-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 03/11/2021] [Indexed: 01/31/2023] Open
Abstract
Herein, in a one-pot method, the reduced graphene oxide layers with the assistance of multiwalled carbon nanotubes were decorated to provide a suitable space for the in situ growth of CoNi2S4, and the porphyrins were incorporated into the layers as well to increase the sensitivity of the prepared nanostructure. The prepared nanocomposite can establish π-π interactions between the genetic material and on the surface of porphyrin rings. Also, hydrogen bonds between genetic domains and the porphyrin' nitrogen and the surface hydroxyl groups are probable. Furthermore, the potential donor-acceptor relationship between the d7 transition metal, cobalt, and the genetic material provides a suitable way to increase the interaction and gene loading , and transfections. The reason for this phenomenon was optimized to increase the EGFP by up to 17.9%. Furthermore, the sensing ability of the nanocomposite towards H2O2 was investigated. In this regard, the limit of detection of the H2O2 obtained 10 µM. Also, the in situ biosensing ability in the HEK-293 and PC12 cell lines was evaluated by the addition of PMA. The nanocomposite showed the ability to detect the released H2O2 after adding the minimum amount of 120 ng/mL of the PMA.
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Bagherifard A, Joneidi Yekta H, Akbari Aghdam H, Motififard M, Sanatizadeh E, Ghadiri Nejad M, Esmaeili S, Saber-Samandari S, Sheikhbahaei E, Khandan A. Improvement in osseointegration of tricalcium phosphate-zircon for orthopedic applications: an in vitro and in vivo evaluation. Med Biol Eng Comput 2020; 58:1681-1693. [DOI: 10.1007/s11517-020-02157-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 03/12/2020] [Indexed: 12/01/2022]
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12
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Das SS, Neelam, Hussain K, Singh S, Hussain A, Faruk A, Tebyetekerwa M. Laponite-based Nanomaterials for Biomedical Applications: A Review. Curr Pharm Des 2020; 25:424-443. [PMID: 30947654 DOI: 10.2174/1381612825666190402165845] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 03/20/2019] [Indexed: 11/22/2022]
Abstract
Laponite based nanomaterials (LBNMs) are highly diverse regarding their mechanical, chemical, and structural properties, coupled with shape, size, mass, biodegradability and biocompatibility. These ubiquitous properties of LBNMs make them appropriate materials for extensive applications. These have enormous potential for effective and targeted drug delivery comprised of numerous biodegradable materials which results in enhanced bioavailability. Moreover, the clay material has been explored in tissue engineering and bioimaging for the diagnosis and treatment of various diseases. The material has been profoundly explored for minimized toxicity of nanomedicines. The present review compiled relevant and informative data to focus on the interactions of laponite nanoparticles and application in drug delivery, tissue engineering, imaging, cell adhesion and proliferation, and in biosensors. Eventually, concise conclusions are drawn concerning biomedical applications and identification of new promising research directions.
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Affiliation(s)
- Sabya S Das
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi-835215, Jharkhand, India
| | - Neelam
- Department of Pharmaceutical Sciences, NIMS University, Jaipur-303121, Rajasthan, India
| | - Kashif Hussain
- Gyani Inder Singh Institute of Professional Studies, Dehradun-248003, Uttarakhand, India
| | - Sima Singh
- School of Health Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Afzal Hussain
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi-835215, Jharkhand, India
| | - Abdul Faruk
- Department of Pharmaceutical Sciences, Hemwati Nandan Bahuguna Garhwal University, Srinagar, Uttarakhand, India
| | - Mike Tebyetekerwa
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science, Donghua University, Shanghai, China
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13
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Cebe T, Ahuja N, Monte F, Awad K, Vyavhare K, Aswath P, Huang J, Brotto M, Varanasi V. Novel 3D-printed methacrylated chitosan-laponite nanosilicate composite scaffolds enhance cell growth and biomineral formation in MC3T3 pre-osteoblasts. JOURNAL OF MATERIALS RESEARCH 2020; 35:58-75. [PMID: 35844898 PMCID: PMC9285673 DOI: 10.1557/jmr.2018.260] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study compared the effect of gelatin- and chitosan-based scaffolds on osteoblast biomineralization. These scaffolds have been modified using methacrylate and laponite nanosilicates to improve their mechanical strength and support osteoblast function. Scaffold materials were prepared to have the same compressive strength (14-15 MPa) such that differences in cell response would be isolated to differences in biopolymer chemistry. The materials were tested for rheological properties to optimize the bio-ink for successful 3D printing using a robocast-assisted deposition system. Osteoblasts were cultured on the surface of 3D-printed methacrylated chitosan-laponite (MAC-Lp), methacrylated gelatin-laponite (MAG-Lp), MAC, and MAG scaffolds. MAC-Lp scaffolds showed increased cell viability, cell growth, and biomineral formation as compared to MAG-Lp scaffolds. FTIR results showed the presence of higher biomineral phosphate and extracellular matrix (ECM) collagen-like amide formation on MAC-Lp scaffolds as compared to MAG-Lp scaffolds. MAC-Lp scaffolds showed increased density of ECM-like tissue from SEM analysis, stained mineral nodules from Alizarin staining, and the existence of Ca─P species evident by X-ray absorbance near edge structure analysis. In conclusion, MAC-Lp scaffolds enhanced osteoblast growth and biomineral formation as compared to MAG-Lp scaffolds.
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Affiliation(s)
- Tugba Cebe
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Neelam Ahuja
- Department of Graduate Nursing, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Felipe Monte
- Department of Graduate Nursing, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Kamal Awad
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, USA; and Department of Refractories and Ceramics, National Research Centre, Giza 12622, Egypt
| | - Kimaya Vyavhare
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Pranesh Aswath
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Jian Huang
- Department of Graduate Nursing, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Marco Brotto
- Department of Graduate Nursing, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas 76019, USA
| | - Venu Varanasi
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019, USA; and Department of Graduate Nursing, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas 76019, USA
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14
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Gonzaga VDAM, Poli AL, Gabriel JS, Tezuka DY, Valdes TA, Leitão A, Rodero CF, Bauab TM, Chorilli M, Schmitt CC. Chitosan-laponite nanocomposite scaffolds for wound dressing application. J Biomed Mater Res B Appl Biomater 2019; 108:1388-1397. [PMID: 31512818 DOI: 10.1002/jbm.b.34487] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 08/24/2019] [Accepted: 08/29/2019] [Indexed: 12/25/2022]
Abstract
The pivotal issue of skin regeneration research is the development of effective biomaterials that exhibit biological activities as fungicide and bactericide, combining simple and low cost manufacturing technologies. In this context, nanocomposite scaffolds based on chitosan (Ch)/Laponite (Lap) were produced by using different concentrations of Lap via freeze-drying process for potential application in skin regeneration. The influence of Lap concentration on the scaffold properties was evaluated. The prepared scaffolds were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), porosity, swelling capacity, and mechanical analyses. The results revealed that the scaffolds exhibited a porous architecture, besides the increase in the clay content, leads to an increase in the porosity, an improvement of mechanical strength, and a decrease of swelling capacity. In vitro tests were also carried out to evaluate the biocompatibility of the materials, such as bioadhesion, antibacterial activity, viability, and cell adhesion. Viability and cell adhesion demonstrated that all scaffolds were not cytotoxic and the fibroblast cells readily attached on the surface of the scaffolds. Thereby, the results suggested that the nanocomposite scaffolds are biomaterials potentially useful as wound dressings.
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Affiliation(s)
| | - Alessandra L Poli
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Juliana S Gabriel
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Daiane Y Tezuka
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Talita A Valdes
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Andrei Leitão
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Camila F Rodero
- Department of Drugs and Medicine, School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Taís M Bauab
- Department of Biological Sciences, School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Marlus Chorilli
- Department of Drugs and Medicine, School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Carla C Schmitt
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo, Brazil
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15
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Abd El-Lateef HM, Khalaf MM. Novel dispersed Tl2O3-SiO2/polyaniline nanocomposites: in-situ polymerization, characterization and enforcement as a corrosion protective layer for carbon-steel in acidic chloride medium. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.059] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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16
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Gaharwar AK, Cross LM, Peak CW, Gold K, Carrow JK, Brokesh A, Singh KA. 2D Nanoclay for Biomedical Applications: Regenerative Medicine, Therapeutic Delivery, and Additive Manufacturing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1900332. [PMID: 30941811 PMCID: PMC6546555 DOI: 10.1002/adma.201900332] [Citation(s) in RCA: 169] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/23/2019] [Indexed: 05/03/2023]
Abstract
Clay nanomaterials are an emerging class of 2D biomaterials of interest due to their atomically thin layered structure, charged characteristics, and well-defined composition. Synthetic nanoclays are plate-like polyions composed of simple or complex salts of silicic acids with a heterogeneous charge distribution and patchy interactions. Due to their biocompatible characteristics, unique shape, high surface-to-volume ratio, and charge, nanoclays are investigated for various biomedical applications. Here, a critical overview of the physical, chemical, and physiological interactions of nanoclay with biological moieties, including cells, proteins, and polymers, is provided. The state-of-the-art biomedical applications of 2D nanoclay in regenerative medicine, therapeutic delivery, and additive manufacturing are reviewed. In addition, recent developments that are shaping this emerging field are discussed and promising new research directions for 2D nanoclay-based biomaterials are identified.
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Affiliation(s)
- Akhilesh K Gaharwar
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
- Material Science and Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
- Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX, 77843, USA
| | - Lauren M Cross
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Charles W Peak
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Karli Gold
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - James K Carrow
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Anna Brokesh
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Kanwar Abhay Singh
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
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Lai M, Jin Z, Yan M, Zhu J, Yan X, Xu K. The controlled naringin release from TiO2 nanotubes to regulate osteoblast differentiation. J Biomater Appl 2018; 33:673-680. [DOI: 10.1177/0885328218809239] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
To design titanium (Ti)-based biomaterials with controlled drug-releasing bioactive property, TiO2 nanotubes with a diameter of approximately 110 nm was fabricated by electrochemical anodization. TiO2 nanotubes were then loaded with naringin by direct dropping and coated with chitosan layers. The surface morphologies, chemical compositions and wettability of different substrates were characterized by field emission scanning electron microscopy, atomic force microscope, X-ray photoelectron spectroscopy and contact angle measurement, respectively. The in vitro release behavior of naringin was evaluated by UV-visible-spectrophotometer. The biological properties of osteoblasts on different substrates were investigated in vitro. Our results indicate that the chitosan-coated naringin-loaded TiO2 nanotubes enhanced osteoblast spreading, proliferation, alkaline phosphatase activity and late-stage osteoblast mineralization. This study provides a platform to help enhance osteointegration between the bone and implant surface in clinical applications.
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Affiliation(s)
- Min Lai
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Ziyang Jin
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Mengying Yan
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Jing Zhu
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Xufeng Yan
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Kui Xu
- Biomedical Engineering Research Center, Medical School of Ningbo University, Ningbo, Zhejiang, China
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18
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Vashist A, Kaushik A, Vashist A, Sagar V, Ghosal A, Gupta YK, Ahmad S, Nair M. Advances in Carbon Nanotubes-Hydrogel Hybrids in Nanomedicine for Therapeutics. Adv Healthc Mater 2018; 7:e1701213. [PMID: 29388356 PMCID: PMC6248342 DOI: 10.1002/adhm.201701213] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 11/21/2017] [Indexed: 12/21/2022]
Abstract
In spite of significant advancement in hydrogel technology, low mechanical strength and lack of electrical conductivity have limited their next-level biomedical applications for skeletal muscles, cardiac and neural cells. Host-guest chemistry based hybrid nanocomposites systems have gained attention as they completely overcome these pitfalls and generate bioscaffolds with tunable electrical and mechanical characteristics. In recent years, carbon nanotube (CNT)-based hybrid hydrogels have emerged as innovative candidates with diverse applications in regenerative medicines, tissue engineering, drug delivery devices, implantable devices, biosensing, and biorobotics. This article is an attempt to recapitulate the advancement in synthesis and characterization of hybrid hydrogels and provide deep insights toward their functioning and success as biomedical devices. The improved comparative performance and biocompatibility of CNT-hydrogels hybrids systems developed for targeted biomedical applications are addressed here. Recent updates toward diverse applications and limitations of CNT hybrid hydrogels is the strength of the review. This will provide a holistic approach toward understanding of CNT-based hydrogels and their applications in nanotheranostics.
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Affiliation(s)
- Arti Vashist
- Center for Personalized Nanomedicine, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Ajeet Kaushik
- Center for Personalized Nanomedicine, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Atul Vashist
- Department of Biotechnology, All India Institute of Medical Sciences, New Delhi, India, 110029
| | - Vidya Sagar
- Center for Personalized Nanomedicine, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Anujit Ghosal
- School of Biotechnology, Jawaharlal Nehru University, New Delhi, India, 110067
| | - Y. K. Gupta
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India, 110029
| | - Sharif Ahmad
- Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, India, 110025
| | - Madhavan Nair
- Center for Personalized Nanomedicine, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
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19
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Lee HY, Hwang CH, Kim HE, Jeong SH. Enhancement of bio-stability and mechanical properties of hyaluronic acid hydrogels by tannic acid treatment. Carbohydr Polym 2018; 186:290-298. [DOI: 10.1016/j.carbpol.2018.01.056] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/30/2017] [Accepted: 01/17/2018] [Indexed: 12/24/2022]
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20
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Mousa M, Evans ND, Oreffo RO, Dawson JI. Clay nanoparticles for regenerative medicine and biomaterial design: A review of clay bioactivity. Biomaterials 2018; 159:204-214. [DOI: 10.1016/j.biomaterials.2017.12.024] [Citation(s) in RCA: 143] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 12/21/2017] [Accepted: 12/31/2017] [Indexed: 11/17/2022]
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21
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Tang L, Wei W, Wang X, Qian J, Li J, He A, Yang L, Jiang X, Li X, Wei J. LAPONITE® nanorods regulating degradability, acidic-alkaline microenvironment, apatite mineralization and MC3T3-E1 cells responses to poly(butylene succinate) based bio-nanocomposite scaffolds. RSC Adv 2018; 8:10794-10805. [PMID: 35541558 PMCID: PMC9078889 DOI: 10.1039/c7ra13452e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/10/2018] [Indexed: 01/03/2023] Open
Abstract
Novel bio-nanocomposite scaffolds for bone tissue engineering were prepared by incorporation of LAPONITE® (LAP) nanorods into poly(butylene succinate) (PBSu). The results showed that the scaffolds had well interconnected macroporous structures with macropore size in the range of 200–400 μm and porosity of around 70%. In addition, the water absorption, degradability and apatite mineralization ability of the scaffolds were clearly enhanced with the increase of LAP content. Moreover, the degradation of LAP produced alkaline products, which neutralized the acidic degradable products of PBSu, and formed a weak alkaline microenvironment similar to a biological environment. Furthermore, the adhesion, proliferation and differentiation of MC3T3-E1 cells onto the scaffolds were significantly promoted with the increase of LAP content, in which the scaffold with 30 wt% LAP (sPL30) exhibited the best stimulation effect on the cells responses. The results suggested that the promotion of cells responses could be ascribed to the improvements of surface characteristics (including roughness, hydrophilicity, ions release and apatite formation, etc.) of the scaffolds. The sPL30 scaffold with excellent biocompatibility, bioactivity and degradability had great potential for applications in bone tissue engineering. PBSu/LAP bio-nanocomposite scaffolds were prepared, and the sPL30 scaffolds significantly stimulated cell adhesion and proliferation.![]()
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Affiliation(s)
- Liangchen Tang
- Key Laboratory for Ultrafine Materials of Ministry of Education
- East China University of Science and Technology
- 130 Meilong Road, Shanghai 200237
- China
| | - Wu Wei
- College of Materials Science & Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Xuehong Wang
- Key Laboratory for Ultrafine Materials of Ministry of Education
- East China University of Science and Technology
- 130 Meilong Road, Shanghai 200237
- China
| | - Jun Qian
- Key Laboratory for Ultrafine Materials of Ministry of Education
- East China University of Science and Technology
- 130 Meilong Road, Shanghai 200237
- China
| | - Jianyou Li
- Huzhou Center Hospital
- Department Orthopedic
- Huzhou 313000
- China
| | - Axiang He
- Second Mil. Med. Univ
- Changzheng Hosp
- Dep. Orthopaed Surg
- Shanghai 200003
- China
| | - Lili Yang
- Second Mil. Med. Univ
- Changzheng Hosp
- Dep. Orthopaed Surg
- Shanghai 200003
- China
| | - Xuesheng Jiang
- Huzhou Center Hospital
- Department Orthopedic
- Huzhou 313000
- China
| | - Xiongfeng Li
- Huzhou Center Hospital
- Department Orthopedic
- Huzhou 313000
- China
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education
- East China University of Science and Technology
- 130 Meilong Road, Shanghai 200237
- China
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22
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Sumathra M, Rajan M, Munusamy MA. A phosphorylated chitosan armed hydroxyapatite nanocomposite for advancing activity onosteoblastandosteosarcomacells. NEW J CHEM 2018. [DOI: 10.1039/c8nj01316k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, applications of traditional medicine in tissue engineering have gained increasing attention.
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Affiliation(s)
- Murugan Sumathra
- Biomaterials in Medicinal Chemistry Laboratory
- Department of Natural Products Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625021
| | - Mariappan Rajan
- Biomaterials in Medicinal Chemistry Laboratory
- Department of Natural Products Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625021
| | - Murugan A Munusamy
- Department of Botany and Microbiology
- College of Science
- King Saud University
- Riyadh
- Saudi Arabia
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23
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Motealleh A, Kehr NS. Nanocomposite Hydrogels and Their Applications in Tissue Engineering. Adv Healthc Mater 2017; 6. [PMID: 27900856 DOI: 10.1002/adhm.201600938] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/18/2016] [Indexed: 01/21/2023]
Abstract
Nanocomposite (NC) hydrogels, organic-inorganic hybrid materials, are of great interest as artificial three-dimensional (3D) biomaterials for biomedical applications. NC hydrogels are prepared in water by chemically or physically cross-linking organic polymers with nanomaterials (NMs). The incorporation of hard inorganic NMs into the soft organic polymer matrix enhances the physical, chemical, and biological properties of NC hydrogels. Therefore, NC hydrogels are excellent candidates for artificial 3D biomaterials, particularly in tissue engineering applications, where they can mimic the chemical, mechanical, electrical, and biological properties of native tissues. A wide range of functional NMs and synthetic or natural organic polymers have been used to design new NC hydrogels with novel properties and tailored functionalities for biomedical uses. Each of these approaches can improve the development of NC hydrogels and, thus, provide advanced 3D biomaterials for biomedical applications.
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Affiliation(s)
- Andisheh Motealleh
- Physikalisches Institut and Center for Nanotechnology; Westfälische Wilhelms-Universität Münster; Heisenbergstrasse 11 D-48149 Münster Germany
| | - Nermin Seda Kehr
- Physikalisches Institut and Center for Nanotechnology; Westfälische Wilhelms-Universität Münster; Heisenbergstrasse 11 D-48149 Münster Germany
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24
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Parani M, Lokhande G, Singh A, Gaharwar AK. Engineered Nanomaterials for Infection Control and Healing Acute and Chronic Wounds. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10049-69. [PMID: 27043006 DOI: 10.1021/acsami.6b00291] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nanoengineered biomaterials have dramatically expanded the range of tools used for infection control and to accelerate wound healing. This review thoroughly describes the developments that are shaping this emerging field and evaluates the potential wound healing applications of recently developed engineered nanomaterials for both acute and chronic wounds. Specifically, we will assess the unique characteristics of engineered nanomaterials that render them applicable for wound healing and infection control. A range of engineered nanomaterials, including polymeric-, metallic- and ceramic-based nanomaterials, that could be used as therapeutic delivery agents to accelerate regeneration of damaged dermal and epidermal tissues are also detailed. Finally, we will detail the current state of engineered nanomaterials for wound regeneration and will identify promising new research directions in infection control.
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Affiliation(s)
- Madasamy Parani
- Genomics Laboratory, Department of Genetic Engineering, SRM University , Chennai, Tamil Nadu 603 203, India
| | | | - Ankur Singh
- Sibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, New York 14853, United States
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25
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Jeong SH, Koh YH, Kim SW, Park JU, Kim HE, Song J. Strong and Biostable Hyaluronic Acid-Calcium Phosphate Nanocomposite Hydrogel via in Situ Precipitation Process. Biomacromolecules 2016; 17:841-51. [PMID: 26878437 DOI: 10.1021/acs.biomac.5b01557] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Hyaluronic acid (HAc) hydrogel exhibits excellent biocompatibility, but it has limited biomedical application due to its poor biomechanical properties as well as too-fast enzymatic degradation. In this study, we have developed an in situ precipitation process for the fabrication of a HAc-calcium phosphate nanocomposite hydrogel, after the formation of the glycidyl methacrylate-conjugated HAc (GMHA) hydrogels via photo-cross-linking, to improve the mechanical and biological properties under physiological conditions. In particular, our process facilitates the rapid incorporation of calcium phosphate (CaP) nanoparticles of uniform size and with minimal agglomeration into a polymer matrix, homogeneously. Compared with pure HAc, the nanocomposite hydrogels exhibit improved mechanical behavior. Specifically, the shear modulus is improved by a factor of 4. The biostability of the nanocomposite hydrogel was also significantly improved compared with that of pure HAc hydrogels under both in vitro and in vivo conditions.
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Affiliation(s)
- Seol-Ha Jeong
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea
| | - Young-Hag Koh
- School of Biomedical Engineering, Korea University , Seoul 136-703, Korea
| | - Suk-Wha Kim
- Department of Reconstructive and Plastic Surgery, Seoul National University Hospital , Seoul 110-744, Korea
| | - Ji-Ung Park
- Department of Plastic and Reconstructive Surgery, Seoul National University Boramae Hospital , Seoul 156-707, Korea
| | - Hyoun-Ee Kim
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea.,Biomedical Implant Convergence Research Center, Advanced Institutes of Convergence Technology , Suwon 443-270, Korea
| | - Juha Song
- Department of Materials Science and Engineering, Seoul National University , Seoul 151-742, Korea.,Biomedical Implant Convergence Research Center, Advanced Institutes of Convergence Technology , Suwon 443-270, Korea
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26
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Chitin and Chitosan Nanocomposites for Tissue Engineering. SPRINGER SERIES ON POLYMER AND COMPOSITE MATERIALS 2016. [DOI: 10.1007/978-81-322-2511-9_6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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27
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Ordikhani F, Dehghani M, Simchi A. Antibiotic-loaded chitosan-Laponite films for local drug delivery by titanium implants: cell proliferation and drug release studies. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:269. [PMID: 26507202 DOI: 10.1007/s10856-015-5606-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 10/22/2015] [Indexed: 06/05/2023]
Abstract
In this study, chitosan-Laponite nanocomposite coatings with bone regenerative potential and controlled drug-release capacity are prepared by electrophoretic deposition technique. The controlled release of a glycopeptide drug, i.e. vancomycin, is attained by the intercalation of the polymer and drug macromolecules into silicate galleries. Fourier-transform infrared spectrometry reveals electrostatic interactions between the charged structure of clay and the amine and hydroxyl groups of chitosan and vancomycin, leading to a complex positively-charged system with high electrophoretic mobility. By applying electric field the charged particles are deposited on the surface of titanium foils and uniform chitosan films containing 25-55 wt% Laponite and 937-1655 µg/cm(2) vancomycin are obtained. Nanocomposite films exhibit improved cell attachment with higher cell viability. Alkaline phosphatase assay reveals enhanced cell proliferation due the gradual dissolution of Laponite particles into the culture medium. In-vitro drug-release studies show lower release rate through a longer period for the nanocomposite compared to pristine chitosan.
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Affiliation(s)
- Farideh Ordikhani
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran
| | - Mehdi Dehghani
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran
| | - Arash Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran.
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran.
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28
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Abstract
Different types of cationic clay minerals and their applications in various biological systems.
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Affiliation(s)
- M. Ghadiri
- University of Sydney
- Faculty of Pharmacy
- Sydney
- Australia
| | - W. Chrzanowski
- University of Sydney
- Faculty of Pharmacy
- Sydney
- Australia
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Centre for Regenerative Medicine
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29
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Kehr NS, Atay S, Ergün B. Self-assembled Monolayers and Nanocomposite Hydrogels of Functional Nanomaterials for Tissue Engineering Applications. Macromol Biosci 2014; 15:445-63. [DOI: 10.1002/mabi.201400363] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nermin Seda Kehr
- Physikalisches Institut and Center for Nanotechnology; Westfälische Wilhelms-Universität Münster; Heisenbergstrasse 11 D-48149 Münster Germany
| | - Seda Atay
- Department of Nanotechnology and Nanomedicine; Hacettepe University; 06800 Ankara Turkey
| | - Bahar Ergün
- Department of Chemistry; Biochemistry Division; Hacettepe University; 06800 Ankara Turkey
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30
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Development, mechanical evaluation and surface characteristics of chitosan/polyvinyl alcohol based polymer composite coatings on titanium metal. J Mech Behav Biomed Mater 2014; 40:314-324. [DOI: 10.1016/j.jmbbm.2014.08.014] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 08/16/2014] [Accepted: 08/18/2014] [Indexed: 12/16/2022]
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31
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Ramadass SK, Perumal S, Gopinath A, Nisal A, Subramanian S, Madhan B. Sol-gel assisted fabrication of collagen hydrolysate composite scaffold: a novel therapeutic alternative to the traditional collagen scaffold. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15015-15025. [PMID: 25105509 DOI: 10.1021/am502948g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Collagen is one of the most widely used biomaterial for various biomedical applications. In this Research Article, we present a novel approach of using collagen hydrolysate, smaller fragments of collagen, as an alternative to traditionally used collagen scaffold. Collagen hydrolysate composite scaffold (CHCS) was fabricated with sol-gel transition procedure using tetraethoxysilane as the silica precursor. CHCS exhibits porous morphology with pore sizes varying between 380 and 780 μm. Incorporation of silica conferred CHCS with controlled biodegradation and better water uptake capacity. Notably, 3T3 fibroblast proliferation was seen to be significantly better under CHCS treatment when compared to treatment with collagen scaffold. Additionally, CHCS showed excellent antimicrobial activity against the wound pathogens Staphylococcus aureus, Bacillus subtilis, and Escherichia coli due to the inherited antimicrobial activity of collagen hydrolysate. In vivo wound healing experiments with full thickness excision wounds in rat model demonstrated that wounds treated with CHCS showed accelerated healing when compared to wounds treated with collagen scaffold. These findings indicate that the CHCS scaffold from collagen fragments would be an effective and affordable alternative to the traditionally used collagen structural biomaterials.
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32
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Morariu S, Bercea M, Sacarescu L. Tailoring of Clay/Poly(ethylene oxide) Hydrogel Properties by Chitosan Incorporation. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501891t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simona Morariu
- “Petru Poni” Institute
of Macromolecular Chemistry, 41-A Grigore
Ghica Voda Alley, 700487 Iasi, Romania
| | - Maria Bercea
- “Petru Poni” Institute
of Macromolecular Chemistry, 41-A Grigore
Ghica Voda Alley, 700487 Iasi, Romania
| | - Liviu Sacarescu
- “Petru Poni” Institute
of Macromolecular Chemistry, 41-A Grigore
Ghica Voda Alley, 700487 Iasi, Romania
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33
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The osteogenic differentiation of SSEA-4 sub-population of human adipose derived stem cells using silicate nanoplatelets. Biomaterials 2014; 35:9087-99. [PMID: 25123923 DOI: 10.1016/j.biomaterials.2014.07.052] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 07/23/2014] [Indexed: 11/24/2022]
Abstract
How to surpass in vitro stem cell differentiation, reducing cell manipulation, and lead the in situ regeneration process after transplantation, remains to be unraveled in bone tissue engineering (bTE). Recently, we showed that the combination of human bone marrow stromal cells with bioactive silicate nanoplatelets (sNPs) promotes the osteogenic differentiation without the use of standard osteogenic inductors. Even more, using SSEA-4(+) cell-subpopulations (SSEA-4(+)hASCs) residing within the adipose tissue, as a single-cellular source to obtain relevant cell types for bone regeneration, was also proposed. Herein, sNPs were used to promote the osteogenic differentiation of SSEA-4(+)hASCs. The interactions between SSEA-4(+)hASCs and sNPs, namely the internalization pathway and effect on cells osteogenic differentiation, were evaluated. SNPs below 100 μg/mL showed high cytocompatibility and fast internalization via clathrin-mediated pathway. SNPs triggered an overexpression of osteogenic-related markers (RUNX2, osteopontin, osteocalcin) accompanied by increased alkaline phosphatase activity and deposition of a predominantly collagen-type I matrix. Consequently, a robust matrix mineralization was achieved, covering >90% of the culturing surface area. Overall, we demonstrated the high osteogenic differentiation potential of SSEA-4(+)hASCs, further enhanced by the addition of sNPs in a dose dependent manner. This strategy endorses the combination of an adipose-derived cell-subpopulation with inorganic compounds to achieve bone matrix-analogs with clinical relevance.
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34
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Wu F, Meng G, He J, Wu Y, Wu F, Gu Z. Antibiotic-loaded chitosan hydrogel with superior dual functions: antibacterial efficacy and osteoblastic cell responses. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10005-13. [PMID: 24938653 DOI: 10.1021/am502537k] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
It is critical for the clinical success to take the biological function into consideration when integrating the antibacterial function into the implanted biomaterials. To this aim, we prepared gentamycin sulfate (GS)-loaded carboxymethyl-chitosan (CM-chitosan) hydrogel cross-linked by genipin. The prepared hydrogels not only achieved superb inhibition on bacteria growth and biofilm formation of Staphylococcus aureus but also significantly enhanced the adhesion, proliferation, and differentiation of MC3T3-E1 cells. The observed dual functions were likely based on the intrinsic property of the positive charged chitosan-based hydrogel, which could be modified to selectively disrupt the bacteria wall/membrane and promote cell adhesion and proliferation, as suggested by the membrane permeability study. The genipin concentration played an important role in controlling the degradation time of the chitosan hydrogel and the MC3T3-E1 cell responses. The loading of GS not only significantly increased the antibacterial efficiency but also was beneficial for the osteoblastic cell responses. Overall, the biocompatibility of the prepared chitosan-GS hydrogel could be tuned with both the genipin and GS concentrations, which control the available positive charged sites of chitosan. The results demonstrated that chitosan-GS hydrogel is an effective and simple approach to achieving combined antibacterial efficacy and excellent osteoblastic cell responses, which has great potential in orthopedic applications.
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Affiliation(s)
- Fang Wu
- National Engineering Research Center for Biomaterials, Sichuan University , Chengdu 610064, P.R. China
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35
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Xie CM, Lu X, Wang KF, Meng FZ, Jiang O, Zhang HP, Zhi W, Fang LM. Silver nanoparticles and growth factors incorporated hydroxyapatite coatings on metallic implant surfaces for enhancement of osteoinductivity and antibacterial properties. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8580-8589. [PMID: 24720634 DOI: 10.1021/am501428e] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Research on incorporation of both growth factors and silver (Ag) into hydroxyapatite (HA) coatings on metallic implant surfaces for enhancing osteoinductivity and antibacterial properties is a challenging work. Generally, Ag nanoparticles are easy to agglomerate and lead to a large increase in local Ag concentration, which could potentially affect cell activity. On the other hand, growth factors immobilization requires mild processing conditions so as to maintain their activities. In this study, bone morphology protein-2 (BMP-2) and Ag nanoparticle contained HA coatings were prepared on Ti surfaces by combining electrochemical deposition (ED) of Ag and electrostatic immobilization of BMP-2. During the ED process, chitosan (CS) was selected as the stabilizing agent to chelate Ag ions and generate Ag nanoparticles that are uniformly distributed in the coatings. CS also reduces Ag toxicity while retaining its antibacterial activity. Afterwards, a BMP/heparin solution was absorbed on the CS/Ag/HA coatings. Consequently, BMP-2 was immobilized on the coatings by the electrostatic attraction between CS, heparin, and BMP-2. Sustained release of BMP-2 and Ag ions from HA coatings was successfully demonstrated for a long period. Results of antibacterial tests indicate that the CS/Ag/HA coatings have high antibacterial properties against both Staphylococcus epidermidis and Escherichia coli. Osteoblasts (OB) culture reveals that the CS/Ag/HA coatings exhibit good biocompatibility. Bone marrow stromal cells (BMSCs) culture indicates that the BMP/CS/Ag/HA coatings have good osteoinductivity and promote the differentiation of BMSCs. Ti bars with BMP/CS/Ag/HA coatings were implanted into the femur of rabbits to evaluate the osteoinductivity of the coatings. Results indicate that BMP/CS/Ag/HA coatings favor bone formation in vivo. In summary, this study presents a convenient and effective method for the incorporation of growth factors and antibacterial agents into HA coatings. This method can be utilized to modify a variety of metallic implant surfaces.
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Affiliation(s)
- Chao-Ming Xie
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu, Sichuan 610031, China
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36
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Konjac Glucomannan/Poly(vinyl alcohol)/Na+Rectorite Nanocomposite Films: Structure, Characteristic and Drug Delivery Behaviour. J Inorg Organomet Polym Mater 2013. [DOI: 10.1007/s10904-013-9950-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Dawson JI, Oreffo ROC. Clay: new opportunities for tissue regeneration and biomaterial design. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:4069-4086. [PMID: 23722321 DOI: 10.1002/adma.201301034] [Citation(s) in RCA: 198] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 04/04/2013] [Indexed: 06/02/2023]
Abstract
Seminal recent studies that have shed new light on the remarkable properties of clay interactions suggest unexplored opportunities for biomaterial design and regenerative medicine. Here, recent conceptual and technological developments in the science of clay interactions with biomolecules, polymers, and cells are examined, focusing on the implications for tissue engineering and regenerative strategies. Pioneering studies demonstrating the utility of clay for drug-delivery and scaffold design are reviewed and areas for future research and development highlighted.
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Affiliation(s)
- Jonathan I Dawson
- Institute of Developmental Sciences University of Southampton Southampton, UK.
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Pandit V, Zuidema JM, Venuto KN, Macione J, Dai G, Gilbert RJ, Kotha SP. Evaluation of multifunctional polysaccharide hydrogels with varying stiffness for bone tissue engineering. Tissue Eng Part A 2013; 19:2452-63. [PMID: 23724786 DOI: 10.1089/ten.tea.2012.0644] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The use of hydrogels for bone regeneration has been limited due to their inherent low modulus to support cell adhesion and proliferation as well as their susceptibility to bacterial infections at the wound site. To overcome these limitations, we evaluated multifunctional polysaccharide hydrogels of varying stiffness to obtain the optimum stiffness at which the gels (1) induce proliferation of human dermal fibroblasts, human umbilical vascular endothelial cells (HUVECs), and murine preosteoblasts (MC3T3-E1), (2) induce osteoblast differentiation and mineralization, and (3) exhibit an antibacterial activity. Rheological studies demonstrated that the stiffness of hydrogels made of a polysaccharide blend of methylcellulose, chitosan, and agarose was increased by crosslinking the chitosan component to different extents with increasing amounts of genipin. The gelation time decreased (from 210 to 60 min) with increasing genipin concentrations. Proliferation of HUVECs decreased by 10.7 times with increasing gel stiffness, in contrast to fibroblasts and osteoblasts, where it increased with gel stiffness by 6.37 and 7.8 times, respectively. At day 14 up to day 24, osteoblast expression of differentiation markers-osteocalcin, osteopontin-and early mineralization marker-alkaline phosphatase, were significantly enhanced in the 0.5% (w/v) crosslinked gel, which also demonstrated enhanced mineralization by day 25. The antibacterial efficacy of the hydrogels decreased with the increasing degree of crosslinking as demonstrated by biofilm formation experiments, but gels crosslinked with 0.5% (w/v) genipin still demonstrated significant bacterial inhibition. Based on these results, gels crosslinked with 0.5% (w/v) genipin, where 33% of available groups on chitosan were crosslinked, exhibited a stiffness of 502±64.5 Pa and demonstrated the optimal characteristics to support bone regeneration.
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Affiliation(s)
- Vaibhav Pandit
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute , Troy, New York
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Mihaila SM, Gaharwar AK, Reis RL, Marques AP, Gomes ME, Khademhosseini A. Photocrosslinkable kappa-carrageenan hydrogels for tissue engineering applications. Adv Healthc Mater 2013; 2:895-907. [PMID: 23281344 DOI: 10.1002/adhm.201200317] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/04/2012] [Indexed: 12/27/2022]
Abstract
Kappa carrageenan (κ-CA) is a natural-origin polymer that closely mimics the glycosaminoglycan structure, one of the most important constituents of native tissues extracellular matrix. Previously, it has been shown that κ-CA can crosslink via ionic interactions rendering strong, but brittle hydrogels. In this study, we introduce photocrosslinkable methacrylate moieties on the κ-CA backbone to create physically and chemically crosslinked hydrogels highlighting their use in the context of tissue engineering. By varying the degree of methacrylation, the effect on hydrogel crosslinking was investigated in terms of hydration degree, dissolution profiles, morphological, mechanical, and rheological properties. Furthermore, the viability of fibroblast cells cultured inside the photocrosslinked hydrogels was investigated. The combination of chemical and physical crosslinking procedures enables the formation of hydrogels with highly versatile physical and chemical properties, while maintaining the viability of encapsulated cells. To our best knowledge, this is the first study reporting the synthesis of photocrosslinkable κ-CA with controllable compressive moduli, swelling ratios and pore size distributions. Moreover, by micromolding approaches, spatially controlled geometries and cell distribution patterns could be obtained, thus enabling the development of cell-material platforms that can be applied and tailored to a broad range of tissue engineering strategies.
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Affiliation(s)
- Silvia M. Mihaila
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, 02139, USA
- 3B's Research Group‐Biomaterials, Biodegradables and Biomimetics, University of Minho, Avepark‐Zona Industrial da Gandra, S. Cláudio do Barco, 4806‐09, Caldas das Taipas, Guimarães, Portugal and ICVS/3B's‐PT, Government Associate Laboratory, Braga/Guimarães, Portugal
- Harvard‐MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Akhilesh K. Gaharwar
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Rui L. Reis
- 3B's Research Group‐Biomaterials, Biodegradables and Biomimetics, University of Minho, Avepark‐Zona Industrial da Gandra, S. Cláudio do Barco, 4806‐09, Caldas das Taipas, Guimarães, Portugal and ICVS/3B's‐PT, Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Alexandra P. Marques
- 3B's Research Group‐Biomaterials, Biodegradables and Biomimetics, University of Minho, Avepark‐Zona Industrial da Gandra, S. Cláudio do Barco, 4806‐09, Caldas das Taipas, Guimarães, Portugal and ICVS/3B's‐PT, Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Manuela E. Gomes
- 3B's Research Group‐Biomaterials, Biodegradables and Biomimetics, University of Minho, Avepark‐Zona Industrial da Gandra, S. Cláudio do Barco, 4806‐09, Caldas das Taipas, Guimarães, Portugal and ICVS/3B's‐PT, Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, 02139, USA
- Harvard‐MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
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Chitosan(PEO)/silica hybrid nanofibers as a potential biomaterial for bone regeneration. Carbohydr Polym 2013; 94:713-22. [DOI: 10.1016/j.carbpol.2013.01.068] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 01/17/2013] [Accepted: 01/22/2013] [Indexed: 11/22/2022]
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Photocrosslinked nanocomposite hydrogels from PEG and silica nanospheres: structural, mechanical and cell adhesion characteristics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1800-7. [PMID: 23827639 DOI: 10.1016/j.msec.2012.12.099] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 10/05/2012] [Accepted: 12/31/2012] [Indexed: 02/02/2023]
Abstract
Photopolymerized hydrogels are extensively investigated for various tissue engineering applications, primarily due to their ability to form hydrogels in a minimally invasive manner. Although photocrosslinkable hydrogels provide necessary biological and chemical characteristics to mimic cellular microenvironments, they often lack sufficient mechanical properties. Recently, nanocomposite approaches have demonstrated potential to overcome these deficits by reinforcing the hydrogel network with. In this study, we investigate some physical, chemical, and biological properties of photocrosslinked poly(ethylene glycol) (PEG)-silica hydrogels. The addition of silica nanospheres significantly suppresses the hydration degree of the PEG hydrogels, indicating surface interactions between the silica nanospheres and the polymer chains. No significant change in hydrogel microstructure or average pore size due to the addition of silica nanospheres was observed. However, addition of silica nanospheres significantly increases both the mechanical strength and the toughness of the hydrogel networks. The biological properties of these nanocomposite hydrogels were evaluated by seeding fibroblast cells on the hydrogel surface. While the PEG hydrogels showed minimum cell adhesion, spreading and proliferation, the addition of silica nanospheres enhanced initial cell adhesion, promoted cell spreading and increased the metabolic activity of the cells. Overall, results indicate that the addition of silica nanospheres improves the mechanical stiffness and cell adhesion properties of PEG hydrogels and can be used for biomedical applications that required controlled cell adhesion.
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Gaharwar AK, Kishore V, Rivera C, Bullock W, Wu CJ, Akkus O, Schmidt G. Physically crosslinked nanocomposites from silicate-crosslinked PEO: mechanical properties and osteogenic differentiation of human mesenchymal stem cells. Macromol Biosci 2012; 12:779-93. [PMID: 22517665 DOI: 10.1002/mabi.201100508] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Revised: 01/30/2012] [Indexed: 01/21/2023]
Abstract
The mechanical and biological properties of silicate-crosslinked PEO nanocomposites are studied. A strong correlation is observed between silicate concentration and mechanical properties. In vitro cell culture studies reveal that an increase in silicate concentration enhances the attachment and proliferation of human mesenchymal stem cells significantly. An upregulation in the expression of osteocalcin on nanocomposites compared to the tissue culture polystyrene control is observed. Together, these results suggest that silicate-based nanocomposites are bioactive and have the potential to be used in a range of biotechnological and biomedical applications such as injectable matrices, biomedical coatings, drug delivery, and regenerative medicine.
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Affiliation(s)
- Akhilesh K Gaharwar
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-2032, USA.
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Gaharwar AK, Rivera CP, Wu CJ, Schmidt G. Transparent, elastomeric and tough hydrogels from poly(ethylene glycol) and silicate nanoparticles. Acta Biomater 2011; 7:4139-48. [PMID: 21839864 DOI: 10.1016/j.actbio.2011.07.023] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Revised: 06/17/2011] [Accepted: 07/25/2011] [Indexed: 10/17/2022]
Abstract
The structures and mechanical properties of both physically and covalently cross-linked nanocomposite hydrogels made from poly(ethylene glycol) (PEG) and silicate nanoparticles (Laponite RD) are investigated. Injectable nanocomposite precursor solutions can be covalently cross-linked via photopolymerization. The resulting hydrogels are transparent and have interconnected pores, high elongation and toughness. These properties depend on the hydrogel composition, polymer-nanoparticle interactions and degree of cross-linking (both physical and covalent). Covalent cross-linking of polymer chains leads to the formation of an elastic network, whereas physical cross-linking between nanoparticles and polymer chains induces viscoelastic properties. At high deformations covalent bonds may be broken but physical bonds rebuild and to some extent self-heal the overall network structure. Addition of silicate also enhances the bioactivity and adhesiveness of the hydrogel as these materials stick to soft tissue as well as to hard surfaces. In addition, MC3T3-E1 mouse preosteoblast cells readily adhere and spread on nanocomposite hydrogel surfaces. Collectively, the combinations of properties such as elasticity, stiffness, interconnected network, adhesiveness to surfaces and bio-adhesion to cells provide inspiration and opportunities to engineer mechanically strong and elastic tissue matrixes for orthopedic, craniofacial and dental applications.
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Yang WJ, Cai T, Neoh KG, Kang ET, Dickinson GH, Teo SLM, Rittschof D. Biomimetic anchors for antifouling and antibacterial polymer brushes on stainless steel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7065-76. [PMID: 21563843 DOI: 10.1021/la200620s] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Barnacle cement (BC) was beneficially applied on stainless steel (SS) to serve as the initiator anchor for surface-initiated polymerization. The amine and hydroxyl moieties of barnacle cement reacted with 2-bromoisobutyryl bromide to provide the alkyl halide initiator for the surface-initiated atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate (HEMA). The hydroxyl groups of HEMA polymer (PHEMA) were then converted to carboxyl groups for coupling of chitosan (CS) to impart the SS surface with both antifouling and antibacterial properties. The surface-functionalized SS reduced bovine serum albumin adsorption, bacterial adhesion, and exhibited antibacterial efficacy against Escherichia coli (E. coli). The effectiveness of barnacle cement as an initiator anchor was compared to that of dopamine, a marine mussel inspired biomimetic anchor previously used in surface-initiated polymerization. The results indicate that the barnacle cement is a stable and effective anchor for functional surface coatings and polymer brushes.
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Affiliation(s)
- Wen Jing Yang
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 119260
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Gaharwar AK, Dammu SA, Canter JM, Wu CJ, Schmidt G. Highly extensible, tough, and elastomeric nanocomposite hydrogels from poly(ethylene glycol) and hydroxyapatite nanoparticles. Biomacromolecules 2011; 12:1641-50. [PMID: 21413708 DOI: 10.1021/bm200027z] [Citation(s) in RCA: 215] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Unique combinations of hard and soft components found in biological tissues have inspired researchers to design and develop synthetic nanocomposite gels and hydrogels with elastomeric properties. These elastic materials can potentially be used as synthetic mimics for diverse tissue engineering applications. Here we present a set of elastomeric nanocomposite hydrogels made from poly(ethylene glycol) (PEG) and hydroxyapatite nanoparticles (nHAp). The aqueous nanocomposite PEG-nHAp precursor solutions can be injected and then covalently cross-linked via photopolymerization. The resulting PEG-nHAp hydrogels have interconnected pore sizes ranging from 100 to 300 nm. They have higher extensibilities, fracture stresses, compressive strengths, and toughness when compared with conventional PEO hydrogels. The enhanced mechanical properties are a result of polymer nanoparticle interactions that interfere with the permanent cross-linking of PEG during photopolymerization. The effect of nHAp concentration and temperature on hydrogel swelling kinetics was evaluated under physiological conditions. An increase in nHAp concentration decreased the hydrogel saturated swelling degree. The combination of PEG and nHAp nanoparticles significantly improved the physical and chemical hydrogel properties as well as some biological characteristics such as osteoblast cell adhesion. Further development of these elastomeric materials can potentially lead to use as a matrix for drug delivery and tissue repair especially for orthopedic applications.
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Affiliation(s)
- Akhilesh K Gaharwar
- Purdue University, Weldon School of Biomedical Engineering, West Lafayette, Indiana, United States
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