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Fan MH, Pi JK, Zou CY, Jiang YL, Li QJ, Zhang XZ, Xing F, Nie R, Han C, Xie HQ. Hydrogel-exosome system in tissue engineering: A promising therapeutic strategy. Bioact Mater 2024; 38:1-30. [PMID: 38699243 PMCID: PMC11061651 DOI: 10.1016/j.bioactmat.2024.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/24/2024] [Accepted: 04/08/2024] [Indexed: 05/05/2024] Open
Abstract
Characterized by their pivotal roles in cell-to-cell communication, cell proliferation, and immune regulation during tissue repair, exosomes have emerged as a promising avenue for "cell-free therapy" in clinical applications. Hydrogels, possessing commendable biocompatibility, degradability, adjustability, and physical properties akin to biological tissues, have also found extensive utility in tissue engineering and regenerative repair. The synergistic combination of exosomes and hydrogels holds the potential not only to enhance the efficiency of exosomes but also to collaboratively advance the tissue repair process. This review has summarized the advancements made over the past decade in the research of hydrogel-exosome systems for regenerating various tissues including skin, bone, cartilage, nerves and tendons, with a focus on the methods for encapsulating and releasing exosomes within the hydrogels. It has also critically examined the gaps and limitations in current research, whilst proposed future directions and potential applications of this innovative approach.
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Affiliation(s)
- Ming-Hui Fan
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Jin-Kui Pi
- Core Facilities, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Chen-Yu Zou
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Yan-Lin Jiang
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Qian-Jin Li
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Xiu-Zhen Zhang
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Fei Xing
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Rong Nie
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Chen Han
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Hui-Qi Xie
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
- Frontier Medical Center, Tianfu Jincheng Laboratory, Chengdu, Sichuan, 610212, PR China
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Gonzalez-Pujana A, Igartua M, Hernandez RM, Santos-Vizcaino E. Laponite nanoclays for the sustained delivery of therapeutic proteins. Eur J Pharm Sci 2024; 201:106858. [PMID: 39033884 DOI: 10.1016/j.ejps.2024.106858] [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: 04/30/2024] [Revised: 06/22/2024] [Accepted: 07/17/2024] [Indexed: 07/23/2024]
Abstract
Protein therapeutics hold immense promise for treating a wide array of diseases. However, their efficacy is often compromised by rapid degradation and clearance. The synthetic smectite clay Laponite emerges as a promising candidate for their sustained delivery. Despite its unique properties allow to load and release proteins mitigating burst release and extending their effects, precise control over Laponite-protein interactions remains challenging since it depends on a complex interplay of factors whose implication is not fully understood yet. The aim of this review article is to shed light on this issue, providing a comprehensive discussion of the factors influencing protein loading and release, including the physicochemical properties of the nanoclay and proteins, pH, dispersion buffer, clay/protein concentration and Laponite degradation. Furthermore, we thoroughly revise the array of bioactive proteins that have been delivered from formulations containing the nanoclay, highlighting Laponite-polymer nanocomposite hydrogels, a promising avenue currently under extensive investigation.
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Affiliation(s)
- Ainhoa Gonzalez-Pujana
- NanoBioCel Research Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Madrid, Spain; Bioaraba, NanoBioCel Research Group, Vitoria-Gasteiz, Spain
| | - Manoli Igartua
- NanoBioCel Research Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Madrid, Spain; Bioaraba, NanoBioCel Research Group, Vitoria-Gasteiz, Spain
| | - Rosa Maria Hernandez
- NanoBioCel Research Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Madrid, Spain; Bioaraba, NanoBioCel Research Group, Vitoria-Gasteiz, Spain.
| | - Edorta Santos-Vizcaino
- NanoBioCel Research Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Madrid, Spain; Bioaraba, NanoBioCel Research Group, Vitoria-Gasteiz, Spain.
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Davern JW, Hipwood L, Bray LJ, Meinert C, Klein TJ. Addition of Laponite to gelatin methacryloyl bioinks improves the rheological properties and printability to create mechanically tailorable cell culture matrices. APL Bioeng 2024; 8:016101. [PMID: 38204454 PMCID: PMC10776181 DOI: 10.1063/5.0166206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024] Open
Abstract
Extrusion-based bioprinting has gained widespread popularity in biofabrication due to its ability to assemble cells and biomaterials in precise patterns and form tissue-like constructs. To achieve this, bioinks must have rheological properties suitable for printing while maintaining cytocompatibility. However, many commonly used biomaterials do not meet the rheological requirements and therefore require modification for bioprinting applications. This study demonstrates the incorporation of Laponite-RD (LPN) into gelatin methacryloyl (GelMA) to produce highly customizable bioinks with desired rheological and mechanical properties for extrusion-based bioprinting. Bioink formulations were based on GelMA (5%-15% w/v) and LPN (0%-4% w/v), and a comprehensive rheological design was applied to evaluate key rheological properties necessary for extrusion-based bioprinting. The results showed that GelMA bioinks with LPN (1%-4% w/v) exhibited pronounced shear thinning and viscoelastic behavior, as well as improved thermal stability. Furthermore, a concentration window of 1%-2% (w/v) LPN to 5%-15% GelMA demonstrated enhanced rheological properties and printability required for extrusion-based bioprinting. Construct mechanical properties were highly tunable by varying polymer concentration and photocrosslinking parameters, with Young's moduli ranging from ∼0.2 to 75 kPa. Interestingly, at higher Laponite concentrations, GelMA cross-linking was inhibited, resulting in softer hydrogels. High viability of MCF-7 breast cancer cells was maintained in both free-swelling droplets and printed hydrogels, and metabolically active spheroids formed over 7 days of culture in all conditions. In summary, the addition of 1%-2% (w/v) LPN to gelatin-based bioinks significantly enhanced rheological properties and retained cell viability and proliferation, suggesting its suitability for extrusion-based bioprinting.
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Chen L, Zhang S, Duan Y, Song X, Chang M, Feng W, Chen Y. Silicon-containing nanomedicine and biomaterials: materials chemistry, multi-dimensional design, and biomedical application. Chem Soc Rev 2024; 53:1167-1315. [PMID: 38168612 DOI: 10.1039/d1cs01022k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The invention of silica-based bioactive glass in the late 1960s has sparked significant interest in exploring a wide range of silicon-containing biomaterials from the macroscale to the nanoscale. Over the past few decades, these biomaterials have been extensively explored for their potential in diverse biomedical applications, considering their remarkable bioactivity, excellent biocompatibility, facile surface functionalization, controllable synthesis, etc. However, to expedite the clinical translation and the unexpected utilization of silicon-composed nanomedicine and biomaterials, it is highly desirable to achieve a thorough comprehension of their characteristics and biological effects from an overall perspective. In this review, we provide a comprehensive discussion on the state-of-the-art progress of silicon-composed biomaterials, including their classification, characteristics, fabrication methods, and versatile biomedical applications. Additionally, we highlight the multi-dimensional design of both pure and hybrid silicon-composed nanomedicine and biomaterials and their intrinsic biological effects and interactions with biological systems. Their extensive biomedical applications span from drug delivery and bioimaging to therapeutic interventions and regenerative medicine, showcasing the significance of their rational design and fabrication to meet specific requirements and optimize their theranostic performance. Additionally, we offer insights into the future prospects and potential challenges regarding silicon-composed nanomedicine and biomaterials. By shedding light on these exciting research advances, we aspire to foster further progress in the biomedical field and drive the development of innovative silicon-composed nanomedicine and biomaterials with transformative applications in biomedicine.
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Affiliation(s)
- Liang Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
| | - Shanshan Zhang
- Department of Ultrasound Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, P. R. China
| | - Yanqiu Duan
- Laboratory Center, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200071, P. R. China.
| | - Xinran Song
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
| | - Meiqi Chang
- Laboratory Center, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200071, P. R. China.
| | - Wei Feng
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
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Rodrigo MJ, Cardiel MJ, Fraile JM, Mayoral JA, Pablo LE, Garcia-Martin E. Laponite for biomedical applications: An ophthalmological perspective. Mater Today Bio 2024; 24:100935. [PMID: 38239894 PMCID: PMC10794930 DOI: 10.1016/j.mtbio.2023.100935] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 01/22/2024] Open
Abstract
Clay minerals have been applied in biomedicine for thousands of years. Laponite is a nanostructured synthetic clay with the capacity to retain and progressively release drugs. In recent years there has been a resurgence of interest in Laponite application in various biomedical areas. This is the first paper to review the potential biomedical applications of Laponite in ophthalmology. The introduction briefly covers the physical, chemical, rheological, and biocompatibility features of different routes of administration. After that, emphasis is placed on 1) drug delivery for antibiotics, anti-inflammatories, growth factors, other proteins, and cancer treatment; 2) bleeding prevention or treatment; and 3) tissue engineering through regenerative medicine using scaffolds in intraocular and extraocular tissue. Although most scientific research is not performed on the eye, both the findings and the new treatments resulting from that research are potentially applicable in ophthalmology since many of the drugs used are the same, the tissue evaluated in vitro or in vivo is also present in the eye, and the pathologies treated also occur in the eye. Finally, future prospects for this emerging field are discussed.
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Affiliation(s)
- Maria J. Rodrigo
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain
- Aragon Institute for Health Research (IIS Aragon), GIMSO Research Group, University of Zaragoza (Spain), Avda. San Juan Bosco 13, E-50009 Zaragoza, Spain
| | - Maria J. Cardiel
- Aragon Institute for Health Research (IIS Aragon), GIMSO Research Group, University of Zaragoza (Spain), Avda. San Juan Bosco 13, E-50009 Zaragoza, Spain
- Department of Pathology, Lozano Blesa University Hospital, Zaragoza, Spain
| | - Jose M. Fraile
- Institute for Chemical Synthesis and Homogeneous Catalysis (ISQCH), Faculty of Sciences, University of Zaragoza–CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Jose A. Mayoral
- Institute for Chemical Synthesis and Homogeneous Catalysis (ISQCH), Faculty of Sciences, University of Zaragoza–CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Luis E. Pablo
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain
- Aragon Institute for Health Research (IIS Aragon), GIMSO Research Group, University of Zaragoza (Spain), Avda. San Juan Bosco 13, E-50009 Zaragoza, Spain
- Biotech Vision SLP (spin-off Company), University of Zaragoza, Spain
| | - Elena Garcia-Martin
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain
- Aragon Institute for Health Research (IIS Aragon), GIMSO Research Group, University of Zaragoza (Spain), Avda. San Juan Bosco 13, E-50009 Zaragoza, Spain
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6
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Miele D, Ruggeri M, Vigani B, Viseras C, Natali F, Del Favero E, Rossi S, Sandri G. Nanoclay-Doped Electrospun Nanofibers for Tissue Engineering: Investigation on the Structural Modifications in Physiological Environment. Int J Nanomedicine 2023; 18:7695-7710. [PMID: 38111847 PMCID: PMC10726802 DOI: 10.2147/ijn.s431862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 11/19/2023] [Indexed: 12/20/2023] Open
Abstract
Background Clay minerals are nanomaterials that have recently been recognized as enabling excipients that can promote cell adhesion, proliferation, and differentiation. When nanoclays are loaded in a 3D polymeric nanostructure, the cell-substrate interaction is enhanced, and other bioactive properties are optimized. Purpose In this study, hectorite (HEC)- and montmorillonite (MMT)-doped polymeric scaffolds were explored for the treatment of deep and chronic skin lesions. Methods Scaffolds were manufactured by means of electrospinning and then crosslinked by heating. Physicochemical analyses were correlated with in vitro biopharmaceutical characterization to predict the in vivo fate of the clay-doped scaffolds. Results and Discussion The addition of MMT or HEC to the polymeric scaffold framework modifies the surface arrangement and, consequently, the potential of the scaffolds to interact with biological proteins. The presence of nanoclays alters the nanofiber morphology and size, and MMT doping increases wettability and protein adhesion. This has an impact on fibroblast behavior in a shorter time since scaffold stiffness facilitates cell adhesion and cell proliferation. Conclusion MMT proved to perform better than HEC, and this could be related to its higher hydrophilicity and protein adhesion.
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Affiliation(s)
- Dalila Miele
- Department of Drug Sciences, University of Pavia, Pavia, Italy
| | - Marco Ruggeri
- Department of Drug Sciences, University of Pavia, Pavia, Italy
| | - Barbara Vigani
- Department of Drug Sciences, University of Pavia, Pavia, Italy
| | - Cesar Viseras
- Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Granada, Granada, Spain
| | | | - Elena Del Favero
- Department of Medical Biotechnology and Translational Medicine, University of Milano, Segrate Milano, Italy
| | - Silvia Rossi
- Department of Drug Sciences, University of Pavia, Pavia, Italy
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Hill EH. Investigating Solvent-Induced Aggregation in Edge-Functionalized Layered Silicates via All-Atom Molecular Dynamics Simulations. J Phys Chem B 2023; 127:8066-8073. [PMID: 37672482 DOI: 10.1021/acs.jpcb.3c04432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Molecular dynamics simulations can provide the means to visualize and understand the role of intermolecular interactions in the mechanisms involved in molecular aggregation. Along these lines, simulations can allow the study of how surface chemical modifications can influence nanomaterial assembly at the molecular level. Layered silicate clays have been of significant interest for some time, particularly with regard to their use in organic/inorganic nanocomposites. However, despite numerous reports on the covalent linkage of organic moieties via silanol condensation, the theoretical understanding of these systems has heretofore been limited to noncovalent interactions, specifically ionic interactions at the charged basal surfaces. Herein, a model for edge-functionalized layered aluminosilicate clay, based on the siloxane linkage, is presented. In addition to reproducing experimentally observed degrees of molecular aggregation of clay-linked perylene diimide derivatives with different terminal functional groups as a function of solvent composition, a molecular-level understanding of the role of van der Waals interactions and hydrogen bonding of the different end-groups on the aggregation state in different water/N,N-dimethylformamide mixtures is obtained. The reported model provides a means to simulate organic moieties covalently bound to the layered silicate edge, which will enable future simulations of nanocomposites and organic/inorganic hybrids based on this system.
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Affiliation(s)
- Eric H Hill
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, Hamburg 20146, Germany
- The Hamburg Center for Ultrafast Imaging (CUI), Luruper Chausee 149, Hamburg 22761, Germany
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Bravo I, Viejo L, de Los Ríos C, García-Frutos EM, Darder M. Cellulose/pectin-based materials incorporating Laponite-indole derivative hybrid for oral administration and controlled delivery of the neuroprotective drug. Int J Biol Macromol 2023; 234:123765. [PMID: 36812973 DOI: 10.1016/j.ijbiomac.2023.123765] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 02/07/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023]
Abstract
Bionanocomposite materials based on clays have been designed for oral administration and controlled release of a neuroprotective drug derivative of 5-methylindole, which had featured an innovative pharmacological mechanism for the treatment of neurodegenerative diseases such as Alzheimer's. This drug was adsorbed in the commercially available Laponite® XLG (Lap). X-ray diffractograms confirmed its intercalation in the interlayer region of the clay. The loaded drug was 62.3 meq/100 g Lap, close to the cation exchange capacity of Lap. Per se toxicity studies and neuroprotective experiments versus the neurotoxin okadaic acid, a potent and selective inhibitor of protein phosphatase 2A (PP2A), confirmed that the clay-intercalated drug did not exert toxicity in cell cultures and provided neuroprotection. Release tests of the hybrid material performed in media mimicking the gastrointestinal tract indicated a drug release in acid medium close to 25 %. The hybrid was encapsulated in a micro/nanocellulose matrix and processed as microbeads, with pectin coating for additional protection, to minimize release under acidic conditions. Alternatively, low density materials based on a microcellulose/pectin matrix were evaluated as orodispersible foams showing fast disintegration times, sufficient mechanical resistance for handling, and release profiles in simulated media that confirmed a controlled release of the encapsulated neuroprotective drug.
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Affiliation(s)
- Isaac Bravo
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid 28049, Spain; Instituto de Investigación Sanitaria, Hospital Universitario de la Princesa, Madrid 28006, Spain; Instituto Fundación Teófilo Hernando (IFTH), Madrid 28029, Spain
| | - Lucía Viejo
- Instituto de Investigación Sanitaria, Hospital Universitario de la Princesa, Madrid 28006, Spain; Instituto Fundación Teófilo Hernando (IFTH), Madrid 28029, Spain
| | - Cristóbal de Los Ríos
- Instituto de Investigación Sanitaria, Hospital Universitario de la Princesa, Madrid 28006, Spain; Instituto Fundación Teófilo Hernando (IFTH), Madrid 28029, Spain
| | - Eva M García-Frutos
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid 28049, Spain.
| | - Margarita Darder
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid 28049, Spain.
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Balavigneswaran CK, Jaiswal V, Venkatesan R, Karuppiah PS, Sundaram MK, Vasudha TK, Aadinath W, Ravikumar A, Saravanan HV, Muthuvijayan V. Mussel-Inspired Adhesive Hydrogels Based on Laponite-Confined Dopamine Polymerization as a Transdermal Patch. Biomacromolecules 2023; 24:724-738. [PMID: 36599131 DOI: 10.1021/acs.biomac.2c01168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Transdermal patch for local drug delivery has attained huge attention as an attractive alternative to existing drug delivery techniques as it is painless and user-friendly. However, most adhesive hydrogels either do not have adequate adhesion with the skin or cause discomfort while being removed from the skin surface due to excessive adhesion. To address this challenge, we developed an adhesive hydrogel based on laponite-confined dopamine polymerization as a transdermal patch. Laponite RDS nanoclay was used to control the hydrogel's viscous behavior and dopamine polymerization. The laponite polymerized polydopamine (l-PDA) was incorporated into poly(vinyl alcohol) (PVA) to make the PVA-l-PDA hydrogel. The laponite-confined polymerization improved the hydrogels' water contact angle and adhesion strength. The adhesion strength of the PVA-l-PDA hydrogel was adequate to adhere to the evaluated goat skin, glass, and polypropylene surfaces. Notably, the PVA-l-PDA hydrogel was easy to peel off from the skin. Further, we evaluated the drug release profile in goat skin using lidocaine as a model drug. We observed the controlled release of lidocaine from the PVA-l-PDA hydrogel compared to the PVA-PDA hydrogel. In addition, the nanoclay-confined adhesive hydrogel did not show any cytotoxic effect in fibroblasts. Altogether, PVA-l-PDA hydrogels offer appropriate adhesive strength, toughness, and biocompatibility. Thus, the PVA-l-PDA hydrogel has the potential to be an efficient transdermal patch.
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Affiliation(s)
- Chelladurai Karthikeyan Balavigneswaran
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Vaibhav Jaiswal
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Ramya Venkatesan
- Cancer Biology and Reproductive Endocrinology Lab, Department of Animal Science, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Prakash Shyam Karuppiah
- Research and Development Division, V.V.D and Sons Private Limited, Thoothukudi 628003, Tamil Nadu, India
| | - Manoj Kumar Sundaram
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - T K Vasudha
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - W Aadinath
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Akhil Ravikumar
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Hari Vishal Saravanan
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Vignesh Muthuvijayan
- Tissue Engineering and Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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Metal-organic frameworks for the adsorptive removal of pharmaceutically active compounds (PhACs): Comparison to activated carbon. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Li J, Tian Z, Yang H, Duan L, Liu Y. Infiltration of laponite: An effective approach to improve the mechanical properties and thermostability of collagen hydrogel. J Appl Polym Sci 2022. [DOI: 10.1002/app.53366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Jiao Li
- Stomatological Hospital of Chongqing Medical University Chongqing People's Republic of China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences Chongqing People's Republic of China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing People's Republic of China
| | - Zhenhua Tian
- College of Bioresources Chemical and Materials Engineering Shaanxi University of Science & Technology Xi'an People's Republic of China
| | - Huan Yang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan People's Republic of China
| | - Lian Duan
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences Southwest University Chongqing People's Republic of China
| | - Yunfei Liu
- Stomatological Hospital of Chongqing Medical University Chongqing People's Republic of China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences Chongqing People's Republic of China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing People's Republic of China
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12
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Kafili G, Tamjid E, Niknejad H, Simchi A. Development of injectable hydrogels based on human amniotic membrane and polyethyleneglycol-modified nanosilicates for tissue engineering applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Ahmed A, Mahmoud AA, Elkatatny S. Curing Time Impacts on the Mechanical and Petrophysical Properties of a Laponite-Based Oil Well Cement. ACS OMEGA 2022; 7:31246-31259. [PMID: 36092610 PMCID: PMC9453984 DOI: 10.1021/acsomega.2c03491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
Throughout the life of a well, the cement sheath is exposed to several loadings, which can harm its key properties and impede its functions. These loadings become more significant at the early age of forming the cement sheath in which the properties of the cement are not completely developed. In this study, 10 cement samples with and without laponite particles were prepared and cured for five different periods (6, 12, 24, 48, and 72 h). The failure properties, petrophysical parameters, elastic properties, and density variation along the samples were examined. All of the samples were characterized by nuclear magnetic resonance and X-ray diffraction to understand the influence of the curing times on the cement properties. The results showed that the compressive and tensile strengths of both cement systems increased with the curing time and the incorporation of the laponite particle increased the strength of the cement. The permeability of both cement samples decreased with curing time, and the addition of laponite also decreased the permeability of the cement samples because of the presence of laponite-clay particles. The addition of laponite particles also increased the elasticity of the cement as indicated by the decrease in Young's modulus and the increase in Poisson's ratio. Logarithmic relationships were established to represent the changes in porosity, compressive strength, and tensile strength, while the changes in the other properties of permeability, Poisson's ratio, Young's modulus, and density variation were represented accurately with power-law equations.
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14
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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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15
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Stealey S, Khachani M, Zustiak SP. Adsorption and Sustained Delivery of Small Molecules from Nanosilicate Hydrogel Composites. Pharmaceuticals (Basel) 2022; 15:56. [PMID: 35056113 PMCID: PMC8780425 DOI: 10.3390/ph15010056] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/20/2021] [Accepted: 12/29/2021] [Indexed: 12/13/2022] Open
Abstract
Two-dimensional nanosilicate particles (NS) have shown promise for the prolonged release of small-molecule therapeutics while minimizing burst release. When incorporated in a hydrogel, the high surface area and charge of NS enable electrostatic adsorption and/or intercalation of therapeutics, providing a lever to localize and control release. However, little is known about the physio-chemical interplay between the hydrogel, NS, and encapsulated small molecules. Here, we fabricated polyethylene glycol (PEG)-NS hydrogels for the release of model small molecules such as acridine orange (AO). We then elucidated the effect of NS concentration, NS/AO incubation time, and the ability of NS to freely associate with AO on hydrogel properties and AO release profiles. Overall, NS incorporation increased the hydrogel stiffness and decreased swelling and mesh size. When individual NS particles were embedded within the hydrogel, a 70-fold decrease in AO release was observed compared to PEG-only hydrogels, due to adsorption of AO onto NS surfaces. When NS was pre-incubated and complexed with AO prior to hydrogel encapsulation, a >9000-fold decrease in AO release was observed due to intercalation of AO between NS layers. Similar results were observed for other small molecules. Our results show the potential for use of these nanocomposite hydrogels for the tunable, long-term release of small molecules.
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Affiliation(s)
| | | | - Silviya Petrova Zustiak
- Biomedical Engineering Program, Parks College of Engineering, Saint Louis University, Saint Louis, MO 63103, USA; (S.S.); (M.K.)
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16
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Soleimanpour Moghadam N, Azadmehr A, Hezarkhani A. Improving the 6-Aminopenicillanic acid release process using vermiculite-alginate biocomposite bead on drug delivery system. Drug Dev Ind Pharm 2021; 47:1489-1501. [PMID: 34806923 DOI: 10.1080/03639045.2021.2001492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The present study deals with developing vermiculite (VMT)-alginate (Alg) composites with different cross-linker concentrations (CaCl2) to deliver the controlled 6-aminopenicillin acid (6-APA). The Characterization of synthesized composites was conducted by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analyses. Optimization attempts were explored via the response surface method (RSM) to best predict the actual amount of compound. The adsorption capacity of 6-APA onto this adsorbent was found to be 208.33 mg/g, which was higher than that for other clays. The equilibrium and Kinetic studies (chemical reaction and diffusion-based models) indicated that drug absorption on VMT-Alg is homogeneous with chemical interaction. An increase in cross-linker (CaCl2) concentration leads to improvement in the drug encapsulation efficiency while having no significant effect on loading efficiency. The in-vitro release of the pure drug shows a rapid burst release followed by 100% cumulative release within 6 h. Whereas, the synthesized drug with Alg substantially showed less release of 43% after 8 h. Release experiments revealed that the presence of the CaCl2 delayed the release of the 6-APA less than 35% after 12 h. The kinetic release of 6-APA is followed by the Korsmeyer-Peppas model based on Fick's law mechanism due to the kinetic exponent (n < 0.5). All studied composites antibacterial activity after 24 h exposure against E. Coli and S. aureus. The antibacterial activities of composites were evaluated by the halo of no growth. The results showed that the VMT-Alg-6APA composite had strong activity against Gram-positive and Gram-negative bacteria.
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Affiliation(s)
| | - Amirreza Azadmehr
- Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Ardeshir Hezarkhani
- Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
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17
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Rastin H, Mansouri N, Tung TT, Hassan K, Mazinani A, Ramezanpour M, Yap PL, Yu L, Vreugde S, Losic D. Converging 2D Nanomaterials and 3D Bioprinting Technology: State-of-the-Art, Challenges, and Potential Outlook in Biomedical Applications. Adv Healthc Mater 2021; 10:e2101439. [PMID: 34468088 DOI: 10.1002/adhm.202101439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Indexed: 12/17/2022]
Abstract
The development of next-generation of bioinks aims to fabricate anatomical size 3D scaffold with high printability and biocompatibility. Along with the progress in 3D bioprinting, 2D nanomaterials (2D NMs) prove to be emerging frontiers in the development of advanced materials owing to their extraordinary properties. Harnessing the properties of 2D NMs in 3D bioprinting technologies can revolutionize the development of bioinks by endowing new functionalities to the current bioinks. First the main contributions of 2D NMS in 3D bioprinting technologies are categorized here into six main classes: 1) reinforcement effect, 2) delivery of bioactive molecules, 3) improved electrical conductivity, 4) enhanced tissue formation, 5) photothermal effect, 6) and stronger antibacterial properties. Next, the recent advances in the use of each certain 2D NMs (1) graphene, 2) nanosilicate, 3) black phosphorus, 4) MXene, 5) transition metal dichalcogenides, 6) hexagonal boron nitride, and 7) metal-organic frameworks) in 3D bioprinting technology are critically summarized and evaluated thoroughly. Third, the role of physicochemical properties of 2D NMSs on their cytotoxicity is uncovered, with several representative examples of each studied 2D NMs. Finally, current challenges, opportunities, and outlook for the development of nanocomposite bioinks are discussed thoroughly.
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Affiliation(s)
- Hadi Rastin
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
| | - Negar Mansouri
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- School of Electrical and Electronic Engineering The University of Adelaide South Australia 5005 Australia
| | - Tran Thanh Tung
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
| | - Kamrul Hassan
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
| | - Arash Mazinani
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
| | - Mahnaz Ramezanpour
- Department of Surgery‐Otolaryngology Head and Neck Surgery The University of Adelaide Woodville South 5011 Australia
| | - Pei Lay Yap
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
| | - Le Yu
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
| | - Sarah Vreugde
- Department of Surgery‐Otolaryngology Head and Neck Surgery The University of Adelaide Woodville South 5011 Australia
| | - Dusan Losic
- School of Chemical Engineering and Advanced Materials The University of Adelaide South Australia 5005 Australia
- ARC Research Hub for Graphene Enabled Industry Transformation The University of Adelaide South Australia 5005 Australia
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18
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Erezuma I, Eufrasio‐da‐Silva T, Golafshan N, Deo K, Mishra YK, Castilho M, Gaharwar AK, Leeuwenburgh S, Dolatshahi‐Pirouz A, Orive G. Nanoclay Reinforced Biomaterials for Mending Musculoskeletal Tissue Disorders. Adv Healthc Mater 2021; 10:e2100217. [PMID: 34185438 DOI: 10.1002/adhm.202100217] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 06/10/2021] [Indexed: 12/11/2022]
Abstract
Nanoclay-reinforced biomaterials have sparked a new avenue in advanced healthcare materials that can potentially revolutionize treatment of musculoskeletal defects. Native tissues display many important chemical, mechanical, biological, and physical properties that engineered biomaterials need to mimic for optimal tissue integration and regeneration. However, it is time-consuming and difficult to endow such combinatorial properties on materials via feasible and nontoxic procedures. Fortunately, a number of nanomaterials such as graphene, carbon nanotubes, MXenes, and nanoclays already display a plethora of material properties that can be transferred to biomaterials through a simple incorporation procedure. In this direction, the members of the nanoclay family are easy to functionalize chemically, they can significantly reinforce the mechanical performance of biomaterials, and can provide bioactive properties by ionic dissolution products to upregulate cartilage and bone tissue formation. For this reason, nanoclays can become a key component for future orthopedic biomaterials. In this review, we specifically focus on the rapidly decreasing gap between clinic and laboratory by highlighting their application in a number of promising in vivo studies.
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Affiliation(s)
- Itsasne Erezuma
- NanoBioCel Group Laboratory of Pharmaceutics School of Pharmacy University of the Basque Country (UPV/EHU) Paseo de la Universidad 7 Vitoria‐Gasteiz 01006 Spain
- Bioaraba NanoBioCel Research Group Vitoria‐Gasteiz 01009 Spain
| | - Tatiane Eufrasio‐da‐Silva
- Department of Dentistry – Regenerative Biomaterials Radboud University Medical Center Radboud Institute for Molecular Life Sciences Nijmegen 6525 The Netherlands
| | - Nasim Golafshan
- Department of Orthopedics University Medical Center Utrecht Utrecht GA 3584 the Netherlands
- Regenerative Medicine Utrecht Utrecht 3584 the Netherlands
| | - Kaivalya Deo
- Department of Biomedical Engineering College of Engineering Texas A&M University College Station TX‐77843 USA
| | - Yogendra Kumar Mishra
- Mads Clausen Institute NanoSYD University of Southern Denmark Alsion 2 Sønderborg 6400 Denmark
| | - Miguel Castilho
- Department of Orthopedics University Medical Center Utrecht Utrecht GA 3584 the Netherlands
- Regenerative Medicine Utrecht Utrecht 3584 the Netherlands
- Department of Biomedical Engineering Eindhoven University of Technology Eindhoven MB 5600 The Netherlands
| | - Akhilesh K. Gaharwar
- Department of Biomedical Engineering College of Engineering Texas A&M University College Station TX‐77843 USA
- Material Science and Engineering 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
- Interdisciplinary Graduate Program in Genetics Texas A&M University College Station TX‐77843 USA
| | - Sander Leeuwenburgh
- Department of Biomaterials Radboud University Medical Center Philips van Leydenlaan 25 Nijmegen 6525 EX the Netherlands
| | - Alireza Dolatshahi‐Pirouz
- Department of Dentistry – Regenerative Biomaterials Radboud University Medical Center Radboud Institute for Molecular Life Sciences Nijmegen 6525 The Netherlands
- Department of Health Technology Center for Intestinal Absorption and Transport of Biopharmaceuticals Technical University of Denmark Sønderborg 2800 Kgs Denmark
| | - Gorka Orive
- NanoBioCel Group Laboratory of Pharmaceutics School of Pharmacy University of the Basque Country (UPV/EHU) Paseo de la Universidad 7 Vitoria‐Gasteiz 01006 Spain
- Bioaraba NanoBioCel Research Group Vitoria‐Gasteiz 01009 Spain
- Biomedical Research Networking Centre in Bioengineering Biomaterials and Nanomedicine (CIBER‐BBN) Vitoria‐Gasteiz 01006 Spain
- University Institute for Regenerative Medicine and Oral Implantology – UIRMI (UPV/EHU‐Fundación Eduardo Anitua) Vitoria 01007 Spain
- Singapore Eye Research Institute The Academia, 20 College Road, Discovery Tower Singapore 169856 Singapore
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19
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Wang X, Liu Z, Sandoval-Salaiza DA, Afewerki S, Jimenez-Rodriguez MG, Sanchez-Melgar L, Güemes-Aguilar G, Gonzalez-Sanchez DG, Noble O, Lerma C, Parra-Saldivar R, Lemos DR, Llamas-Esperon GA, Shi J, Li L, Lobo AO, Fuentes-Baldemar AA, Bonventre JV, Dong N, Ruiz-Esparza GU. Nanostructured Non-Newtonian Drug Delivery Barrier Prevents Postoperative Intrapericardial Adhesions. ACS APPLIED MATERIALS & INTERFACES 2021; 13:29231-29246. [PMID: 34137251 DOI: 10.1021/acsami.0c20084] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
With the increasing volume of cardiovascular surgeries and the rising adoption rate of new methodologies that serve as a bridge to cardiac transplantation and that require multiple surgical interventions, the formation of postoperative intrapericardial adhesions has become a challenging problem that limits future surgical procedures, causes serious complications, and increases medical costs. To prevent this pathology, we developed a nanotechnology-based self-healing drug delivery hydrogel barrier composed of silicate nanodisks and polyethylene glycol with the ability to coat the epicardial surface of the heart without friction and locally deliver dexamethasone, an anti-inflammatory drug. After the fabrication of the hydrogel, mechanical characterization and responses to shear, strain, and recovery were analyzed, confirming its shear-thinning and self-healing properties. This behavior allowed its facile injection (5.75 ± 0.15 to 22.01 ± 0.95 N) and subsequent mechanical recovery. The encapsulation of dexamethasone within the hydrogel system was confirmed by 1H NMR, and controlled release for 5 days was observed. In vitro, limited cellular adhesion to the hydrogel surface was achieved, and its anti-inflammatory properties were confirmed, as downregulation of ICAM-1 and VCAM-1 was observed in TNF-α activated endothelial cells. In vivo, 1 week after administration of the hydrogel to a rabbit model of intrapericardial injury, superior efficacy was observed when compared to a commercial adhesion barrier, as histological and immunohistochemical examination revealed reduced adhesion formation and minimal immune infiltration of CD3+ lymphocytes and CD68+ macrophages, as well as NF-κβ downregulation. We presented a novel nanostructured drug delivery hydrogel system with unique mechanical and biological properties that act synergistically to prevent cellular infiltration while providing local immunomodulation to protect the intrapericardial space after a surgical intervention.
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Affiliation(s)
- Xichi Wang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zongtao Liu
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Diego A Sandoval-Salaiza
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Engineering and Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Samson Afewerki
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Chemical Engineering and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mildred G Jimenez-Rodriguez
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Engineering and Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Lorena Sanchez-Melgar
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Engineering and Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Gabriela Güemes-Aguilar
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Medicine and Health Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - David G Gonzalez-Sanchez
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Medicine and Health Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Oscar Noble
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Medicine and Health Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Cecilia Lerma
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- School of Engineering and Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Roberto Parra-Saldivar
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- School of Engineering and Science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64849, Mexico
| | - Dario R Lemos
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Guillermo A Llamas-Esperon
- Department of Interventional Cardiology, Hospital Cardiológica, Aguascalientes, Aguascalientes 20230, Mexico
| | - Jiawei Shi
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Li Li
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Anderson O Lobo
- LIMAV-Interdisciplinary Laboratory for Advanced Materials, BioMatLab group, Material Science and Engineering Graduate Program, UFPI- Federal University of Piauí, Teresina, Piauí 64049-550, Brazil
| | - Andres A Fuentes-Baldemar
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Joseph V Bonventre
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Nianguo Dong
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Guillermo U Ruiz-Esparza
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
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20
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Stealey ST, Gaharwar AK, Pozzi N, Zustiak SP. Development of Nanosilicate-Hydrogel Composites for Sustained Delivery of Charged Biopharmaceutics. ACS APPLIED MATERIALS & INTERFACES 2021; 13:27880-27894. [PMID: 34106676 PMCID: PMC8483607 DOI: 10.1021/acsami.1c05576] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nanocomposite hydrogels containing two-dimensional nanosilicates (NS) have emerged as a new technology for the prolonged delivery of biopharmaceuticals. However, little is known about the physical-chemical properties governing the interaction between NS and proteins and the release profiles of NS-protein complexes in comparison to traditional poly(ethylene glycol) (PEG) hydrogel technologies. To fill this gap in knowledge, we fabricated a nanocomposite hydrogel composed of PEG and laponite and identified simple but effective experimental conditions to obtain sustained protein release, up to 23 times slower as compared to traditional PEG hydrogels, as determined by bulk release experiments and fluorescence correlation spectroscopy. Slowed protein release was attributed to the formation of NS-protein complexes, as NS-protein complex size was inversely correlated with protein diffusivity and release rates. While protein electrostatics, protein concentration, and incubation time were important variables to control protein-NS complex formation, we found that one of the most significant and less appreciated variable to obtain a sustained release of bioactive proteins was the buffer chosen for preparing the initial suspension of NS particles. The buffer was found to control the size of nanoparticles, the absorption potential, morphology, and stiffness of hydrogels. From these studies, we conclude that the PEG-laponite composite fabricated is a promising new platform for sustained delivery of positively charged protein therapeutics.
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Affiliation(s)
- Samuel T Stealey
- Biomedical Engineering Program, School of Engineering, Saint Louis University, Saint Louis, Missouri 63103, United States
| | - Akhilesh K Gaharwar
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Nicola Pozzi
- Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, Saint Louis, Missouri 63103, United States
| | - Silviya Petrova Zustiak
- Biomedical Engineering Program, School of Engineering, Saint Louis University, Saint Louis, Missouri 63103, United States
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21
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Qu B, Xue J, Luo Y. Self-assembled caseinate-laponite® nanocomposites for curcumin delivery. Food Chem 2021; 363:130338. [PMID: 34161872 DOI: 10.1016/j.foodchem.2021.130338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/12/2021] [Accepted: 06/05/2021] [Indexed: 01/10/2023]
Abstract
In this study, novel self-assembled protein-clay nanocomposites were developed for curcumin delivery. Experimentally, curcumin was dissolved and deprotonated in sodium caseinate-laponite® (NaCas-LAP) dispersion at pH 12.0 for 30 min followed by neutralization to pH = 7. Due to the pH-mediated dissociation and re-association process, curcumin was successfully encapsulated into NaCas-LAP nanocomposites. The colloidal properties and encapsulation capabilities of NaCas-LAP nanocomposites were investigated, including particle size, zeta potential, encapsulation efficiency, release profile in simulated gastrointestinal tract, as well as nanoscale morphology. The results indicated that upon neutralization, NaCas-LAP nanocomposites were re-associated into smaller particles due to strong hydrophobic interactions among NaCas, LAP and curcumin. Specifically, 0.10% curcumin loaded nanocomposites prepared with 2% NaCas and 0.5% LAP showed improved encapsulation performance (73.4%) with smaller particle size (100 nm). The as-prepared protein-clay nanocomposites hold promising potential to deliver lipophilic bioactive compounds, such as curcumin.
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Affiliation(s)
- Bai Qu
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Jingyi Xue
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Yangchao Luo
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA.
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22
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Nedellec Y, Gondran C, Gorgy K, Mc Murtry S, Agostini P, Elmazria O, Cosnier S. Microcapsule-based biosensor containing catechol for the reagent-free inhibitive detection of benzoic acid by tyrosinase. Biosens Bioelectron 2021; 180:113137. [PMID: 33690099 DOI: 10.1016/j.bios.2021.113137] [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: 01/12/2021] [Revised: 02/26/2021] [Accepted: 02/28/2021] [Indexed: 12/14/2022]
Abstract
A biosensor based on the release of the enzyme substrate from its structure was developed for the inhibitive detection of benzoic acid. A polyurethane support comprising two perforated microcapsules (800 μm in diameter) filled with methylene blue as a model compound and covered with a conductive deposit of multiwalled carbon nanotubes, continuously released this stored dye for 24 h. An increase in methylene blue concentration of 0.5-0.75 μmol L-1 h-1 and 1.5-2 μmol L-1 h-1, in the presence and absence of the multiwalled carbon nanotube coating, respectively, was demonstrated by UV-vis spectroscopy in a 2 mL UV cuvette. The same configuration with microcapsules filled with catechol was modified by a laponite clay coating containing tyrosinase enzyme. The resulting biosensor exhibits a constant cathodic current at -0.155 V vs AgCl/Ag, due to the reduction of the ortho-quinone produced enzymatically from the released catechol. The detection of benzoic acid was recorded from the decrease in cathodic current due to its inhibiting action on the tyrosinase activity. Reagentless biosensors based on different deposited quantity of tyrosinase (100, 200, 400 and 600 μg) were investigated for the detection of catechol and applied to the detection of benzoic acid as inhibitor. The best performance was obtained with the 400 μg-based configuration, namely a detection limit of 0.4 μmol L-1 and a sensitivity of 228 mA L mol-1. After the inhibition process, the biosensors recover 97-100% of their activity towards catechol, confirming a reversible inhibition by benzoic acid.
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Affiliation(s)
- Yannig Nedellec
- Université Grenoble Alpes, DCM UMR 5250, F-38000, Grenoble, France; CNRS, DCM UMR 5250, F-38000, Grenoble, France
| | - Chantal Gondran
- Université Grenoble Alpes, DCM UMR 5250, F-38000, Grenoble, France; CNRS, DCM UMR 5250, F-38000, Grenoble, France
| | - Karine Gorgy
- Université Grenoble Alpes, DCM UMR 5250, F-38000, Grenoble, France; CNRS, DCM UMR 5250, F-38000, Grenoble, France
| | - Stefan Mc Murtry
- Université de Lorraine Institut Jean Lamour, UMR 7198, F-54000, Nancy, France; CNRS, Institut Jean Lamour, UMR, 7198, F-54000, Nancy, France
| | - Pierre Agostini
- Université de Lorraine Institut Jean Lamour, UMR 7198, F-54000, Nancy, France; CNRS, Institut Jean Lamour, UMR, 7198, F-54000, Nancy, France
| | - Omar Elmazria
- Université de Lorraine Institut Jean Lamour, UMR 7198, F-54000, Nancy, France; CNRS, Institut Jean Lamour, UMR, 7198, F-54000, Nancy, France
| | - Serge Cosnier
- Université Grenoble Alpes, DCM UMR 5250, F-38000, Grenoble, France; CNRS, DCM UMR 5250, F-38000, Grenoble, France.
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23
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Nanocomposite gels of poloxamine and Laponite for β-Lapachone release in anticancer therapy. Eur J Pharm Sci 2021; 163:105861. [PMID: 33930520 DOI: 10.1016/j.ejps.2021.105861] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 04/06/2021] [Accepted: 04/22/2021] [Indexed: 12/24/2022]
Abstract
Nano-hybrid systems have been shown to be an attractive platform for drug delivery. Laponite® RD (LAP), a biocompatible synthetic clay, has been exploited for its ability to establish of strong secondary interactions with guest compounds and hybridization with polymers or small molecules that improves, for instance, cell adhesion, proliferation, and differentiation or facilitates drug attachment to their surfaces through charge interaction. In this work, LAP was combined with Tetronics, X-shaped amphiphilic PPO-PEO (poly (propylene oxide)-poly (ethylene oxide) block copolymers. β-Lapachone (BLPC) was selected for its anticancer activity and its limited bioavailability due to very low aqueous solubility, with the aim to improve this by using LAP/Tetronic nano-hybrid systems. The nanocarriers were prepared over a range of Tetronic 1304 concentrations (1 to 20% w/w) and LAP (0 to 3% w/w). A combination of physicochemical methods was employed to characterize the hybrid systems, including rheology, particle size and shape (DLS, TEM), thermal analysis (TG and DSC), FTIR, solubility studies and drug release experiments. In vitro cytotoxicity assays were performed with BALB/3T3 and MCF-7 cell lines. In hybrid systems, a sol-gel transition can occur below physiological temperature. BLPC exhibits the most significant increase in solubility in formulations with a high concentration of T1304 (over 10% w/w) and 1.5% w/w LAP, or systems with only LAP (1.5%), with a 50 and 100-fold increase in solubilisation, respectively. TEM images showed spherical micelles of T1304, which elongated into wormlike micelles with concentration (20%) and in the presence of LAP, a finding that has not been reported before. A sustained release of BLPC over 140 hours was achieved in one of the formulations (10% T1304 with 1.5% laponite), which also showed the best selectivity index towards cancer cells (MCF-7) over BALB/3T3 cell lines. In conclusion, BLPC-loaded T1304/LAP nano-hybrid systems proved safe and highly effective and are thus a promising formulation for anticancer therapy.
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24
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Persano F, Batasheva S, Fakhrullina G, Gigli G, Leporatti S, Fakhrullin R. Recent advances in the design of inorganic and nano-clay particles for the treatment of brain disorders. J Mater Chem B 2021; 9:2756-2784. [PMID: 33596293 DOI: 10.1039/d0tb02957b] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Inorganic materials, in particular nanoclays and silica nanoparticles, have attracted enormous attention due to their versatile and tuneable properties, making them ideal candidates for a wide range of biomedical applications, such as drug delivery. This review aims at overviewing recent developments of inorganic nanoparticles (like porous or mesoporous silica particles) and different nano-clay materials (like montmorillonite, laponites or halloysite nanotubes) employed for overcoming the blood brain barrier (BBB) in the treatment and therapy of major brain diseases such as Alzheimer's, Parkinson's, glioma or amyotrophic lateral sclerosis. Recent strategies of crossing the BBB through invasive and not invasive administration routes by using different types of nanoparticles compared to nano-clays and inorganic particles are overviewed.
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Affiliation(s)
- Francesca Persano
- University of Salento, Department of Mathematics and Physics, Via Per Arnesano 73100, Lecce, Italy
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25
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Soleimanpour Moghadam N, Azadmehr A, Hezarkhani A. Extended release of 6-aminopenicillanic acid by silanol group functionalized vermiculite. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2020.1850291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Amirreza Azadmehr
- Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Ardeshir Hezarkhani
- Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
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26
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Lee CS, Hwang HS, Kim S, Fan J, Aghaloo T, Lee M. Inspired by nature: facile design of nanoclay-organic hydrogel bone sealant with multifunctional properties for robust bone regeneration. ADVANCED FUNCTIONAL MATERIALS 2020; 30:2003717. [PMID: 33122980 PMCID: PMC7591105 DOI: 10.1002/adfm.202003717] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Indexed: 05/19/2023]
Abstract
Bone repair is a complex process involving the sophisticated interplay of osteogenic stem cells, extracellular matrix, and osteoinductive factors, and it is affected by bacterial toxins and oxidative stress. Inspired by the nature of plant-derived phytochemicals and inorganic-organic analogues of the bone extracellular matrix, we report herein the facile design of a nanoclay-organic hydrogel bone sealant (NoBS) that integrates multiple physico-chemical cues for bone regeneration into a single system. Assembly of phytochemical-modified organic chitosan and silica-rich inorganic nanoclay serves as highly biocompatible and osteoconductive extracellular matrix mimics. The decorated phytochemical exerts inherent bactericidal and antioxidant activities, and acts as an intermolecular networking precursor for gelation with injectable and self-healing capabilities. Moreover, the NoBS exerts osteoinductive effects mediated by the nanoclay, which regulates the Wnt/β-catenin pathway, along with the addition of osteoinductive signals, resulting in bone regeneration in a non-healing cranial defect. Engineering of this integrated bone graft substitute with multifunctional properties inspired by natural materials may suggest a promising and effective approach for creating a favorable microenvironment for optimal bone healing.
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Affiliation(s)
- Chung-Sung Lee
- Division of Advanced Prosthodontics, University of California Los Angeles, CA 90095, USA
| | - Hee Sook Hwang
- Division of Advanced Prosthodontics, University of California Los Angeles, CA 90095, USA
| | - Soyon Kim
- Division of Advanced Prosthodontics, University of California Los Angeles, CA 90095, USA
| | - Jiabing Fan
- Division of Advanced Prosthodontics, University of California Los Angeles, CA 90095, USA
| | - Tara Aghaloo
- Division of Diagnostic and Surgical Sciences, University of California Los Angeles, CA 90095, USA
| | - Min Lee
- Division of Advanced Prosthodontics, University of California Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California Los Angeles, CA 90095, USA
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27
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Silva GM, Silva KM, Silva CP, Gonçalves JM, Quina FH. Hybrid Pigments from Anthocyanin Analogues and Synthetic Clay Minerals. ACS OMEGA 2020; 5:26592-26600. [PMID: 33110987 PMCID: PMC7581255 DOI: 10.1021/acsomega.0c03354] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
Flavylium cations are synthetic analogues of anthocyanins, the natural plant pigments that are responsible for the majority of the red, blue, and purple colors of flowers, fruits, and leaves. Unlike anthocyanins, the properties and reactivity of flavylium cations can be manipulated by the nature and position of substituents on the flavylium cation chromophore. Currently, the most promising strategies for stabilizing the color of anthocyanins and flavylium cations appear to be to intercalate and/or adsorb them on solid surfaces and/or in confined spaces. We report here that hybrid pigments with improved thermal stability, fluorescence, and attractive colors are produced by the cation-exchange-mediated adsorption of flavylium cations (FL) on two synthetic clays, the mica-montmorillonite SYn-1, and the laponite SYnL-1. Compared to the FL/SYn-1 hybrid pigments, the FL/SYnL-1 pigments exhibited improved thermal stability as judged by color retention, better preferential adsorption of the cationic form of FL1 at neutral to mildly basic pH (pH 7-8), and lower susceptibility to color changes at pH 10. Although both clays adsorb the cationic form on their external surfaces, SYnL-1 gave more evidence of adsorption in the interlayer regions of the clay. This interlayer adsorption appears to be the contributing factor to the better properties of the FL/SYnL-1 hybrid pigments, pointing to this clay to be a promising inorganic matrix for the development of brightly colored, thermally more stable hybrid pigments based on cationic analogues of natural plant pigments.
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Affiliation(s)
- Gustavo
Thalmer M. Silva
- Instituto
de Química, Universidade de
São Paulo, Av. Lineu Prestes 748, Cidade
Universitária, São Paulo 05508-000, Brazil
| | - Karen Magno Silva
- Instituto
de Química, Universidade de
São Paulo, Av. Lineu Prestes 748, Cidade
Universitária, São Paulo 05508-000, Brazil
- Instituto
Federal de Educação, Ciência
e Tecnologia de São Paulo, Campus São Paulo, 01109-010 São Paulo, Brazil
| | - Cassio P. Silva
- Instituto
de Química, Universidade de
São Paulo, Av. Lineu Prestes 748, Cidade
Universitária, São Paulo 05508-000, Brazil
| | - Josué M. Gonçalves
- Instituto
de Química, Universidade de
São Paulo, Av. Lineu Prestes 748, Cidade
Universitária, São Paulo 05508-000, Brazil
| | - Frank H. Quina
- Instituto
de Química, Universidade de
São Paulo, Av. Lineu Prestes 748, Cidade
Universitária, São Paulo 05508-000, Brazil
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28
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Wu Y, Li K, Kong L, Tang Y, Li G, Jiang W, Shen M, Guo R, Zhao Q, Shi X. Functional LAPONITE Nanodisks Enable Targeted Anticancer Chemotherapy in Vivo. Bioconjug Chem 2020; 31:2404-2412. [PMID: 33001643 DOI: 10.1021/acs.bioconjchem.0c00473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Development of nanoplatforms for targeted anticancer drug delivery for effective tumor therapy still remains challenging in the development of nanomedicine. Here, we present a facile method to formulate a LAPONITE (LAP) nanodisk-based nanosystem for anticancer drug doxorubicin (DOX) delivery to folic acid (FA) receptor-overexpressing tumors. In the current work, aminated LAP nanodisks were first prepared through silanization, then functionalized with polyethylene glycol-linked FA (PEG-FA) via 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) chemistry, and finally employed to physically encapsulate DOX. The formed functional LAP nanodisks (for short, LM-PEG-FA) possess a high DOX loading efficiency (88.6 ± 1.2%) and present a pH-dependent release feature with a quicker DOX release under acidic pH conditions (pH 5.0) than under physiological pH conditions (pH 7.4). In vitro flow cytometry, confocal microscopic observation, and cell viability assay show that the LM-PEG-FA/DOX complexes can be specifically taken up by FAR-overexpressing human ovarian cancer cells (SK-OV-3 cells) and present a specific cancer cell therapeutic effect. Further tumor treatment results reveal that the LM-PEG-FA/DOX complexes can exert a specific therapeutic efficacy to a xenografted SK-OV-3 tumor model in vivo when compared with nontargeted LM-mPEG/DOX complexes. Therefore, the developed LM-PEG-FA nanodisks could be employed as a potential platform for targeted cancer chemotherapy.
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Affiliation(s)
- Yilun Wu
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Kai Li
- Department of Orthopaedics, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, People's Republic of China
| | - Lingdan Kong
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, People's Republic of China
| | - Yueqin Tang
- Experimental Center, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, People's Republic of China
| | - Gaoming Li
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, People's Republic of China
| | - Wenbin Jiang
- Department of Orthopaedics, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, People's Republic of China
| | - Mingwu Shen
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, People's Republic of China
| | - Rui Guo
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, People's Republic of China
| | - Qinghua Zhao
- Department of Orthopaedics, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, People's Republic of China
| | - Xiangyang Shi
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, People's Republic of China.,College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, People's Republic of China.,CQM-Centro de Química da Madeira, Universidade da Madeira, Campus da Penteada, 9000-390 Funchal, Portugal
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29
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Nandi U, Trivedi V, Douroumis D, Mendham AP, Coleman NJ. Layered Silicate-Alginate Composite Particles for the pH-Mediated Release of Theophylline. Pharmaceuticals (Basel) 2020; 13:ph13080182. [PMID: 32781542 PMCID: PMC7465181 DOI: 10.3390/ph13080182] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/28/2020] [Accepted: 07/31/2020] [Indexed: 11/24/2022] Open
Abstract
Numerous natural and synthetic clay minerals have proven to be excellent drug carriers for high drug-loaded and sustained release formulations due to their considerable ion exchange, adsorption, and swelling capacities. Moreover, the synthetic smectite clays have added advantages in terms of compositional purity and controlled cation exchange capacity in comparison to natural clays. This study involves the intercalation of theophylline (TP) in a synthetic clay, Laponite® (LP), followed by the inclusion of the resulting intercalates into sodium alginate (SA) beads to achieve pH-controlled drug release. Maximum intercalated drug incorporation of 68 mg/g was obtained by ion exchange at pH 1.2 and confirmed by an increase in basal spacing of the clay from 12.9 to 15.5 Å. TP release from the binary LP-TP intercalates in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) was found to be 40% and 70%, respectively. LP-TP particles were also incorporated in an SA matrix via polymer crosslinking using CaCl2(aq) to improve the pH selective release. The ternary polymer-clay-drug composite particles effectively prevented the release of TP at low pH in SGF and resulted in sustained release in SIF, with 40% dissolution within 120 min.
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Affiliation(s)
- Uttom Nandi
- Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK; (D.D.); (A.P.M.); (N.J.C.)
- Correspondence: (U.N.); (V.T.)
| | - Vivek Trivedi
- Medway School of Pharmacy, University of Kent, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK
- Correspondence: (U.N.); (V.T.)
| | - Dennis Douroumis
- Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK; (D.D.); (A.P.M.); (N.J.C.)
| | - Andrew P. Mendham
- Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK; (D.D.); (A.P.M.); (N.J.C.)
| | - Nichola J. Coleman
- Faculty of Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK; (D.D.); (A.P.M.); (N.J.C.)
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30
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Le Coeur C, Lorthioir C, Feoktystov A, Wu B, Volet G, Amiel C. Laponite/poly(2-methyl-2-oxazoline) hydrogels: Interplay between local structure and rheological behaviour. J Colloid Interface Sci 2020; 582:149-158. [PMID: 32814221 DOI: 10.1016/j.jcis.2020.07.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 11/08/2022]
Abstract
HYPOTHESIS Dispersions of Laponite in water may form gels, the rheological properties of which being possibly tuned by the addition of polymer chains. Laponite-based hydrogels with poly(ethylene oxide) (PEO) were the most widely investigated systems and the PEO chains were then found to reduce the elastic modulus. EXPERIMENTS Here, hydrogels based on Laponite and poly(2-methyl-2-oxazoline) (POXA) were considered. The adsorption behavior and the local structures within these nanocomposite gels were investigated by small-angle neutron scattering and NMR. The same materials were macroscopically characterized using rheology. FINDINGS An original evolution of the storage modulus G' with the POXA concentration is evidenced compared to Laponite/PEO hydrogels. At low POXA concentrations, a continuous reduction of G' is observed upon increasing the polymer content, as with PEO, due to the screening of electrostatic interactions between the clay platelets. However, above a critical value of the POXA concentration, G' increases with the polymer content. This difference with PEO-based hydrogels is correlated to the stronger affinity of POXA chains for the clay surfaces, which results in the reduction of the inhomogeneities for the Laponite disks within the gels. Steric repulsions would then counterbalance the effect of electrostatic repulsions and lead to the strengthening of the POXA-based hydrogels.
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Affiliation(s)
- C Le Coeur
- Université Paris Est Creteil, CNRS, Institut Chimie et Matériaux Paris Est, 2 Rue Henri Dunant, 94320 Thiais, France; Laboratoire Léon Brillouin, CEA-CNRS (UMR-12), CEA Saclay, Université Paris-Saclay, 91191 Gif-sur-Yvette Cedex, France.
| | - C Lorthioir
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France.
| | - A Feoktystov
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ, Lichtenbergstraße 1, 85748 Garching, Germany.
| | - B Wu
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ, Lichtenbergstraße 1, 85748 Garching, Germany.
| | - G Volet
- Université Paris Est Creteil, CNRS, Institut Chimie et Matériaux Paris Est, 2 Rue Henri Dunant, 94320 Thiais, France; Université d'Evry Val d'Essonne, Rue du Père Jarlan, 91025 Evry Cedex, France.
| | - C Amiel
- Université Paris Est Creteil, CNRS, Institut Chimie et Matériaux Paris Est, 2 Rue Henri Dunant, 94320 Thiais, France.
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31
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Goncharuk O, Samchenko Y, Kernosenko L, Korotych O, Poltoratska T, Pasmurtseva N, Oranska O, Sternik D, Mamyshev I. Thermoresponsive hydrogels physically crosslinked with magnetically modified LAPONITE® nanoparticles. SOFT MATTER 2020; 16:5689-5701. [PMID: 32519723 DOI: 10.1039/d0sm00929f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recently, considering the potential applications of hydrogel nanocomposites in biomedical engineering, there has been a growing interest in the synthesis of hydrogels with improved mechanical properties. Among magnetic materials, iron oxides are of particular interest due to their magnetic properties and biocompatibility. At the same time, LAPONITE®, a synthetic clay, can be used to improve the mechanical properties of polymer-based nanocomposites. In this study we report the effects of hydrogel composition and structure on its thermoresponsive properties and hydrogel sorption and release of a model anticancer drug - 5-fluorouracil. Using one-step coprecipitation method we synthesized magnetic LAPONITE® (LAM) nanoparticles with magnetite-to-LAPONITE® weight ratios from 2 : 1 to 1 : 8. With increase in magnetite concentration the ferrofluidic properties of LAM nanoparticles are getting improved, while fluorouracil absorptivity - decreases. Exfoliation of the clay is observed when the magnetite content exceeds the LAPONITE® content. Physical crosslinking of poly(N-isopropylacrylamide) with LAM nanoparticles yields magnetic thermosensitive hydrogel nanocomposites with controllable temperature-induced drug release. All hydrogel nanocomposites have a distinct volume phase transition from a swollen state to a collapsed state upon heating within the physiologically acceptable temperature range of 33-36 °C.
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Affiliation(s)
- Olena Goncharuk
- Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, Kyiv, Ukraine and Chuiko Institute of Surface Chemistry of NAS of Ukraine, Kyiv, Ukraine
| | - Yurii Samchenko
- Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, Kyiv, Ukraine
| | - Liudmyla Kernosenko
- Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, Kyiv, Ukraine
| | - Olena Korotych
- Chemical Engineering Department, University of Florida, Gainesville, USA.
| | - Tetiana Poltoratska
- Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, Kyiv, Ukraine
| | - Natalia Pasmurtseva
- Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, Kyiv, Ukraine
| | - Olena Oranska
- Chuiko Institute of Surface Chemistry of NAS of Ukraine, Kyiv, Ukraine
| | - Dariusz Sternik
- Chemistry Department, Maria Curie-Sklodowska University, Lublin, Poland
| | - Igor Mamyshev
- Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, Kyiv, Ukraine
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32
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Park K, Dawson JI, Oreffo ROC, Kim YH, Hong J. Nanoclay-Polyamine Composite Hydrogel for Topical Delivery of Nitric Oxide Gas via Innate Gelation Characteristics of Laponite. Biomacromolecules 2020; 21:2096-2103. [PMID: 32267672 DOI: 10.1021/acs.biomac.0c00086] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Because nitric oxide (NO) gas is an endogenously produced signaling molecule related to numerous physiological functions, manystudies have been conducted to develop NO delivery systems for potential biomedical applications. However, NO is a reactive radical gas molecule that has a very short life-time and readily transforms into nitrogen oxide species via reaction with oxygen species. Therefore, it is necessary to develop an NO delivery carrier that allows local release of the NO gas at the site of application. In this study, Laponite (LP) nanoclay was used to fabricate an NO delivery carrier through the formation of Laponite-polyamine (LP-PAn) composites. The Laponite clay and pentaethylenehexamine (PEHA) formed a macromolecular structure by electrostatic interaction and the nitric oxide donor, N-diazeniumdiolate (NONOates), was synthesized into the LP-PAn composite. We investigated the conformation of the LP-PAn composite structure and the NO donor formation by ζ potential, X-ray diffraction, and UV-vis and Fourier transform infrared (FT-IR) spectroscopies and also by analyzing the NO release profile. Additionally, we confirmed the applicability in biomedical applications via a cell viability and in vitro endothelial cell tube formation assay.
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Affiliation(s)
- Kyungtae Park
- School of Chemical & Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Jonathan I Dawson
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Richard O C Oreffo
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Yang-Hee Kim
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Jinkee Hong
- School of Chemical & Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
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Roozbahani M, Kharaziha M. Dexamethasone loaded Laponite
®
/porous calcium phosphate cement for treatment of bone defects. Biomed Mater 2019; 14:055008. [DOI: 10.1088/1748-605x/ab3355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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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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35
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Kimna C, Deger S, Tamburaci S, Tihminlioglu F. Chitosan/montmorillonite composite nanospheres for sustained antibiotic delivery at post-implantation bone infection treatment. Biomed Mater 2019; 14:044101. [DOI: 10.1088/1748-605x/ab1a04] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Malekkhaiat Häffner S, Nyström L, Browning KL, Mörck Nielsen H, Strömstedt AA, van der Plas MJA, Schmidtchen A, Malmsten M. Interaction of Laponite with Membrane Components-Consequences for Bacterial Aggregation and Infection Confinement. ACS APPLIED MATERIALS & INTERFACES 2019; 11:15389-15400. [PMID: 30951282 DOI: 10.1021/acsami.9b03527] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The antimicrobial effects of Laponite nanoparticles with or without loading of the antimicrobial peptide LL-37 was investigated along with their membrane interactions. The study combines data from ellipsometry, circular dichroism, fluorescence spectroscopy, particle size/ζ potential measurements, and confocal microscopy. As a result of the net negative charge of Laponite, loading of net positively charged LL-37 increases with increasing pH. The peptide was found to bind primarily to the outer surface of the Laponite nanoparticles in a predominantly helical conformation, leading to charge reversal. Despite their net positive charge, peptide-loaded Laponite nanoparticles did not kill Gram-negative Escherichia coli bacteria or disrupt anionic model liposomes. They did however cause bacteria flocculation, originating from the interaction of Laponite and bacterial lipopolysaccharide (LPS). Free LL-37, in contrast, is potently antimicrobial through membrane disruption but does not induce bacterial aggregation in the concentration range investigated. Through LL-37 loading of Laponite nanoparticles, the combined effects of bacterial flocculation and membrane lysis are observed. However, bacteria aggregation seems to be limited to Gram-negative bacteria as Laponite did not cause flocculation of Gram-positive Bacillus subtilis bacteria nor did it bind to lipoteichoic acid from bacterial envelopes. Taken together, the present investigation reports several novel phenomena by demonstrating that nanoparticle charge does not invariably control membrane destabilization and by identifying the ability of anionic Laponite nanoparticles to effectively flocculate Gram-negative bacteria through LPS binding. As demonstrated in cell experiments, such aggregation results in diminished LPS-induced cell activation, thus outlining a promising approach for confinement of infection and inflammation caused by such pathogens.
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Affiliation(s)
| | - Lina Nyström
- Department of Pharmacy , Uppsala University , SE-75123 Uppsala , Sweden
| | | | | | | | - Mariena J A van der Plas
- Division of Dermatology and Venereology, Department of Clinical Sciences , Lund University , SE-22184 Lund , Sweden
| | - Artur Schmidtchen
- Division of Dermatology and Venereology, Department of Clinical Sciences , Lund University , SE-22184 Lund , Sweden
| | - Martin Malmsten
- Department of Pharmacy , Uppsala University , SE-75123 Uppsala , Sweden
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37
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Development of a Homogenous Cement Slurry Using Synthetic Modified Phyllosilicate while Cementing HPHT Wells. SUSTAINABILITY 2019. [DOI: 10.3390/su11071923] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cement slurry segregation has a detrimental impact on the cement matrix efficiency in term of zonal isolation. In this study, synthetic modified phyllosilicate (SMP) dispersant, which is known as laponite RD is suggested to reduce the slurry segregation and enhance the vertical homogeneity of the cement matrix in term of density distribution. Seven cement slurries were prepared with different SMP concentrations using molds with different dimensions based on the targeted test, then cured for 24 h at 140 °C and 3000 psi using a high-pressure and high-temperature curing chamber. After that, the samples’ density distribution was evaluated using a direct density measurement and computer tomography (CT) scan imaging technique, and the effect of SMP on the cement rheological parameters, permeability, and compressive strength and were also evaluated. The performance of SMP was then compared with a commercial dispersant. As a result, 0.3% by weight of cement (BWOC) of SMP is found to considerably reduce the vertical density variation along the cement column to 0.46% compared with a density variation of 4.78% for the slurry with the commercial dispersant. The CT scan images confirmed the vertical homogeneity of the slurry with 0.3% BWOC of SMP. Addition of 0.3% BWOC of SMP increased the yield point of the cement slurry to 60.6 MPa compared with 20.5 MPa for the slurry with 0.25% of the commercial dispersant. Adding 0.3% BWOC of SMP into the cement formulation decreased the permeability by 37.1% compared with the commercial dispersant. The sample with 0.3% BWOC of SMP has a compressive strength of 43.9 MPa.
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38
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Cross LM, Carrow JK, Ding X, Singh KA, Gaharwar AK. Sustained and Prolonged Delivery of Protein Therapeutics from Two-Dimensional Nanosilicates. ACS APPLIED MATERIALS & INTERFACES 2019; 11:6741-6750. [PMID: 30676016 PMCID: PMC6472961 DOI: 10.1021/acsami.8b17733] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We present a nanoengineered system for sustained and prolonged delivery of protein therapeutics, which has the potential to impact current orthopedic regeneration strategies. Specifically, we introduce two-dimensional nanosilicates with a high surface area and charged characteristics for delivery of active proteins for more than 30 days. The nanosilicates show high binding efficacy without altering the protein conformation and bioactivity. The released proteins are able to maintain high activity as demonstrated by enhanced differentiation of human mesenchymal stem cells at 10-fold lower concentration compared to the exogenous control. Utilizing the nanosilicates as a delivery vehicle could minimize the negative side effects observed because of the use of supraphysiological dosages of protein therapeutics for orthopedic regeneration strategies.
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Affiliation(s)
- Lauren M. Cross
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - James K. Carrow
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Xicheng Ding
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kanwar Abhay Singh
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Akhilesh K. Gaharwar
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Material Sciences, Texas A&M University, College Station, Texas 77843, United States
- Center for Remote Health and Technologies and Systems, Texas A&M University, College Station, Texas 77843, United States
- Corresponding Author. Phone: 979-458-5540. Fax: 979-845-4450
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39
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Jiang T, Chen G, Shi X, Guo R. Hyaluronic Acid-Decorated Laponite ® Nanocomposites for Targeted Anticancer Drug Delivery. Polymers (Basel) 2019; 11:E137. [PMID: 30960121 PMCID: PMC6401931 DOI: 10.3390/polym11010137] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 01/05/2019] [Accepted: 01/07/2019] [Indexed: 12/14/2022] Open
Abstract
In this study, hyaluronic acid (HA), a natural polysaccharide that can specifically bind to CD44 receptors, was conjugated onto laponite® (LAP) nanodisks for the encapsulation and specific delivery of the anti-cancer drug doxorubicin (DOX) to CD44-overexpressed cancer cells. The prepared LM-HA could encapsulate DOX efficiently and release drug in a continuous manner with pH-responsiveness. In vitro cell viability assay proved that LM-HA had good biocompatibility, and drug-loaded LM-HA/DOX exhibited targeted anti-tumor effects against HeLa cells with CD44 receptors overexpressed. In addition, the flow cytometric detection and confocal laser scanning microscope results confirmed that LM-HA/DOX could be specifically internalized by HeLa cells via CD44-mediated endocytosis. Therefore, the HA-modified LAP nanodisks with high drug loading efficiency, pH-sensitive drug release properties and CD44 targetability might be an efficient nanoplatform for cancer chemotherapy.
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Affiliation(s)
- Tingting Jiang
- Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
| | - Guangxiang Chen
- Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
| | - Xiangyang Shi
- Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
| | - Rui Guo
- Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
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40
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Abstract
The potential of layered silicates as drug carrier is overviewed. Due to their large surface area and expandable interlayer space to accommodate drug molecules, layered silicates have a potential as carrier of various molecules. In addition to the electrostatic interactions between negatively charged layered silicates and positively charged drug molecules, the organic modification of the surface of layered silicates has been applied to accommodate a variety of drug molecules not only cationic ones. The in vitro release experiment of the accommodated drug molecules has been reported under the acidic conditions. In order to discuss the future direction of layered silicates as drug carrier, materials' variation of layered silicates and their modification, and the reported stimuli-responsive hybrids based on layered silicates were introduced.
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Affiliation(s)
- Soontaree Grace Intasa-Ard
- School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong, Thailand
| | - Makoto Ogawa
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong, Thailand.
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41
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Prabha RD, Nair BP, Ditzel N, Kjems J, Nair PD, Kassem M. Strontium functionalized scaffold for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 94:509-515. [PMID: 30423735 DOI: 10.1016/j.msec.2018.09.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/06/2017] [Accepted: 09/20/2018] [Indexed: 01/05/2023]
Abstract
Drug functionalized scaffolds are currently being employed to improve local delivery of osteoprotective drugs with the aim of reducing their loading dose as well as unwanted systemic complications. In this study we tested a poly-(ε) caprolactone (PCL)-laponite-strontium ranelate (SRA) composite scaffold (PLS3) for its abilities to support growth and osteogenic differentiation of human marrow derived stromal stem cells (hMSC). The in vitro experiments showed the PLS3 scaffold supported cell growth and osteogenic differentiation. The in vivo implantation of hMSC seeded PLS3 scaffold in immunocompromised mice revealed vascularized ectopic bone formation. PLS3 scaffolds can be useful in bone regenerative applications in the fields of orthopaedics and dentistry.
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Affiliation(s)
- Rahul D Prabha
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital & University of Southern Denmark, Odense, Denmark; Department of Orthodontics and Dentofacial Orthopaedics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala 682041, India.
| | - Bindu P Nair
- Division of Tissue Engineering and Regeneration Technologies (DTERT), Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, India
| | - Nicholas Ditzel
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital & University of Southern Denmark, Odense, Denmark
| | - Jorgen Kjems
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C 8000, Denmark
| | - Prabha D Nair
- Division of Tissue Engineering and Regeneration Technologies (DTERT), Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, India
| | - Moustapha Kassem
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital & University of Southern Denmark, Odense, Denmark
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42
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Okaikue-Woodi FE, Kelch SE, Schmidt MP, Enid Martinez C, Youngman RE, Aristilde L. Structures and mechanisms in clay nanopore trapping of structurally-different fluoroquinolone antimicrobials. J Colloid Interface Sci 2018; 513:367-378. [DOI: 10.1016/j.jcis.2017.11.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/07/2017] [Accepted: 11/07/2017] [Indexed: 12/14/2022]
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43
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Koshy ST, Zhang DKY, Grolman JM, Stafford AG, Mooney DJ. Injectable nanocomposite cryogels for versatile protein drug delivery. Acta Biomater 2018; 65:36-43. [PMID: 29128539 PMCID: PMC5716876 DOI: 10.1016/j.actbio.2017.11.024] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/17/2017] [Accepted: 11/07/2017] [Indexed: 01/15/2023]
Abstract
Sustained, localized protein delivery can enhance the safety and activity of protein drugs in diverse disease settings. While hydrogel systems are widely studied as vehicles for protein delivery, they often suffer from rapid release of encapsulated cargo, leading to a narrow duration of therapy, and protein cargo can be denatured by incompatibility with the hydrogel crosslinking chemistry. In this work, we describe injectable nanocomposite hydrogels that are capable of sustained, bioactive, release of a variety of encapsulated proteins. Injectable and porous cryogels were formed by bio-orthogonal crosslinking of alginate using tetrazine-norbornene coupling. To provide sustained release from these hydrogels, protein cargo was pre-adsorbed to charged Laponite nanoparticles that were incorporated within the walls of the cryogels. The presence of Laponite particles substantially hindered the release of a number of proteins that otherwise showed burst release from these hydrogels. By modifying the Laponite content within the hydrogels, the kinetics of protein release could be precisely tuned. This versatile strategy to control protein release simplifies the design of hydrogel drug delivery systems. STATEMENT OF SIGNIFICANCE Here we present an injectable nanocomposite hydrogel for simple and versatile controlled release of therapeutic proteins. Protein release from hydrogels often requires first entrapping the protein in particles and embedding these particles within the hydrogel to allow controlled protein release. This pre-encapsulation process can be cumbersome, can damage the protein's activity, and must be optimized for each protein of interest. The strategy presented in this work simply premixes the protein with charged nanoparticles that bind strongly with the protein. These protein-laden particles are then placed within a hydrogel and slowly release the protein into the surrounding environment. Using this method, tunable release from an injectable hydrogel can be achieved for a variety of proteins. This strategy greatly simplifies the design of hydrogel systems for therapeutic protein release applications.
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Affiliation(s)
- Sandeep T Koshy
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA; Harvard-MIT Division of Health Sciences and Technology, 77 Massachusetts Avenue, Cambridge 02139, MA, USA
| | - David K Y Zhang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA; The Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Boston, MA 02115, USA
| | - Joshua M Grolman
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA; The Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Boston, MA 02115, USA
| | - Alexander G Stafford
- The Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Boston, MA 02115, USA
| | - David J Mooney
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA; The Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Boston, MA 02115, USA.
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44
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Li J, Yang Y, Yu Y, Li Q, Tan G, Wang Y, Liu W, Pan W. LAPONITE® nanoplatform functionalized with histidine modified oligomeric hyaluronic acid as an effective vehicle for the anticancer drug methotrexate. J Mater Chem B 2018; 6:5011-5020. [DOI: 10.1039/c8tb01284a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The synthetic clay material, LAPONITE® (LAP), having a nanodisk structure together with a negatively charged surface, has been used for effective drug encapsulation by virtue of its interlayer space.
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Affiliation(s)
- Jinyu Li
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
| | - Yue Yang
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
| | - Yibin Yu
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
| | - Qi Li
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
| | - Guoxin Tan
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
| | - Yuanyuan Wang
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
| | - Wei Liu
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
- Henan Key Laboratory of Laser and Opto-electric Information Technology
| | - Weisan Pan
- School of Pharmacy
- Shenyang Pharmaceutical University
- Shenyang 110016
- People's Republic of China
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45
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Felbeck T, Moss S, Botas AMP, Lezhnina MM, Ferreira RAS, Carlos LD, Kynast UH. Monitoring of nanoclay-protein adsorption isotherms via fluorescence techniques. Colloids Surf B Biointerfaces 2017. [PMID: 28623694 DOI: 10.1016/j.colsurfb.2017.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The investigation of nanoparticles and their interaction with bio-macromolecules have become an important issue; the widely discussed protein corona around nanoparticles and their biological fate in general have drawn particular attention. Here, we focus on nanoclay dispersions and the use of solvatochromic fluorescent dyes (Dansyl and Coumarin 153) for monitoring the interaction with two model proteins, bovine serum albumin and β-lactoglobulin. On one hand, these dyes are poorly emissive in water, but experience a boost in their fluorescence when adsorbed into the hydrophobic domains of proteins. On the other hand, (nano)clays and clay minerals have previously been investigated in terms of their individual protein adsorption isotherms and their usefulness for the solubilization of water-insoluble dyes into an aqueous environment. In the following, we have combined all three individual parts (nanoclay, fluorophore and protein) in dispersions in a wide range of concentration ratios to systematically study the various adsorption processes via fluorescence techniques. In order to clarify the extent of dye diffusion and adsorption-desorption equilibria in the investigations, nanoclay hybrids with an adsorbed dye (Coumarin 153) and a covalently conjugated dye (Dansyl) were compared. The results suggest that the fluorescence progression of protein titration curves correlate with the amount of protein adsorbed, matching their reported adsorption isotherms on hectorite clays. Furthermore, experimental data on the protein monolayer formation around the nanoclays could be extracted due to only minor alterations of the dispersions' optical quality and transparency. In this manner, a fluorescence-based monitor for the formation of the globular protein layer around the nanoclay was realized.
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Affiliation(s)
- Tom Felbeck
- Münster University of Applied Sciences, Institute for Optical Technologies, Stegerwaldstr. 39, 48565 Steinfurt, Germany; Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Sebastian Moss
- Münster University of Applied Sciences, Institute for Optical Technologies, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Alexandre M P Botas
- Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Marina M Lezhnina
- Münster University of Applied Sciences, Institute for Optical Technologies, Stegerwaldstr. 39, 48565 Steinfurt, Germany
| | - Rute A S Ferreira
- Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Luís D Carlos
- Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ulrich H Kynast
- Münster University of Applied Sciences, Institute for Optical Technologies, Stegerwaldstr. 39, 48565 Steinfurt, Germany.
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46
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Zhang X, Zhang W, Liu L, Yang M, Huang L, Chen K, Wang R, Yang B, Zhang D, Wang J. Antibiotic-loaded MoS 2 nanosheets to combat bacterial resistance via biofilm inhibition. NANOTECHNOLOGY 2017; 28:225101. [PMID: 28480869 DOI: 10.1088/1361-6528/aa6c9b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The emergence of antibiotic resistance has resulted in increasing difficulty in treating clinical infections associated with biofilm formation, one of the key processes in turn contributing to enhanced antibiotic resistance. With the rapid development of nanotechnology, a new way to overcome antibiotic resistance has opened up. Based on the many and diverse properties of MoS2 nanosheets that have attracted wide attention, in particular their antibacterial potential, herein, a novel antimicrobial agent to combat resistant gram-positive Staphylococcus aureus and gram-negative Salmonella was prepared using chitosan functionalized MoS2 nanosheets loading tetracycline hydrochloride drugs (abbreviated to CM-TH). The antibacterial and anti-biofilm activities of the CM-TH nanocomposites showed the synergetic effect that the combination of nanomaterials and antibiotics was more efficient than either working alone. In particularly, the minimum inhibitory concentration values generally decreased by a factor of dozens, suggesting that CM-TH may become a possible alternative to traditional antibiotics in disrupting biofilms and overcoming antibiotic resistance in treating medical diseases.
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Affiliation(s)
- Xu Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
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47
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Roozbahani M, Kharaziha M, Emadi R. pH sensitive dexamethasone encapsulated laponite nanoplatelets: Release mechanism and cytotoxicity. Int J Pharm 2017; 518:312-319. [DOI: 10.1016/j.ijpharm.2017.01.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/01/2017] [Accepted: 01/02/2017] [Indexed: 12/16/2022]
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48
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Laponite as carrier for controlled in vitro delivery of dexamethasone in vitreous humor models. Eur J Pharm Biopharm 2016; 108:83-90. [PMID: 27594212 DOI: 10.1016/j.ejpb.2016.08.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 08/18/2016] [Accepted: 08/29/2016] [Indexed: 01/08/2023]
Abstract
Laponite clay is able to retain dexamethasone by simple physisorption, presumably accomplished by hydrogen bonding formation and/or complexation with sodium counterions, as shown by solid state NMR. The physisorption can be somehow modulated by changing the solvent in the adsorption process. This simple system is able to deliver dexamethasone in a controlled manner to solutions used as models for vitreous humor. The proven biocompatibility of laponite as well as its transparency in the gel state, together with the simplicity of the preparation method, makes this system suitable for future in vivo tests of ophthalmic treatment.
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49
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Jatav S, Joshi YM. Analyzing a fractal gel of charged oblate nanoparticles in a suspension using time-resolved rheometry and DLVO theory. Faraday Discuss 2016; 186:199-213. [DOI: 10.1039/c5fd00128e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The disk-like nanoparticles of LAPONITE® are known to self-assemble to form a fractal gel within hours after a sufficiently large concentration of LAPONITE® is dispersed in water containing salt. The concentration of sodium counterions associated with LAPONITE® particles, however, continues to increase over a period of days, suggesting that delamination of LAPONITE® disks from stacks is sluggish and/or dissociation of counterions is slow. In either case, spontaneous self-assembly of LAPONITE® particles occurs even though delamination and/or counterion dissociation has not reached its equilibrium state. In order to determine the nature of the fractal gel as the extent of delamination and/or dissociation progresses towards equilibrium, we subject the LAPONITE® suspension to a freezing–defrosting cycle, which interestingly reinitiates the gelation process in suspension afresh. Application of time-resolved rheometry to a defrosted suspension shows that iso-frequency loss tangent curves intersect at an identical point, validating the Winter–Chambon criterion for a critical fractal gel state. Interestingly, while the time required to form a critical gel is observed to decrease with increased time elapsed since preparation, at which freezing–defrosting is carried out, the fractal dimension of the critical gel is observed to remain unaffected. We also solve DLVO theory for free energy interactions between the negatively charged LAPONITE® particle faces and analyze the observed phenomena.
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Affiliation(s)
- Shweta Jatav
- Department of Chemical Engineering
- Indian Institute of Technology, Kanpur
- Kanpur-208016
- India
| | - Yogesh M. Joshi
- Department of Chemical Engineering
- Indian Institute of Technology, Kanpur
- Kanpur-208016
- India
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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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