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Dorchei F, Heydari A, Kroneková Z, Kronek J, Pelach M, Cseriová Z, Chorvát D, Zúñiga-Navarrete F, Rios PD, McGarrigle J, Ghani S, Isa D, Joshi I, Vasuthas K, Rokstad AMA, Oberholzer J, Raus V, Lacík I. Postmodification with Polycations Enhances Key Properties of Alginate-Based Multicomponent Microcapsules. Biomacromolecules 2024. [PMID: 38857534 DOI: 10.1021/acs.biomac.4c00222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Postmodification of alginate-based microspheres with polyelectrolytes (PEs) is commonly used in the cell encapsulation field to control microsphere stability and permeability. However, little is known about how different applied PEs shape the microsphere morphology and properties, particularly in vivo. Here, we addressed this question using model multicomponent alginate-based microcapsules postmodified with PEs of different charge and structure. We found that the postmodification can enhance or impair the mechanical resistance and biocompatibility of microcapsules implanted into a mouse model, with polycations surprisingly providing the best results. Confocal Raman microscopy and confocal laser scanning microscopy (CLSM) analyses revealed stable interpolyelectrolyte complex layers within the parent microcapsule, hindering the access of higher molar weight PEs into the microcapsule core. All microcapsules showed negative surface zeta potential, indicating that the postmodification PEs get hidden within the microcapsule membrane, which agrees with CLSM data. Human whole blood assay revealed complex behavior of microcapsules regarding their inflammatory and coagulation potential. Importantly, most of the postmodification PEs, including polycations, were found to be benign toward the encapsulated model cells.
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Affiliation(s)
- Faeze Dorchei
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Abolfazl Heydari
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
| | - Zuzana Kroneková
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
| | - Juraj Kronek
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
| | - Michal Pelach
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Zuzana Cseriová
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Dušan Chorvát
- Department of Biophotonics, International Laser Centre, Slovak Centre of Scientific and Technical Information, Ilkovičova 3, 841 04 Bratislava, Slovakia
| | - Fernando Zúñiga-Navarrete
- Department of Proteomics, Institute of Virology, Biomedical Research Center of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava, Slovakia
| | - Peter D Rios
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - James McGarrigle
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Sofia Ghani
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Douglas Isa
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Ira Joshi
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Kalaiyarasi Vasuthas
- Centre of Molecular Inflammation Research (CEMIR), Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Prinsesse Kristinas gt.1, NO-7491 Trondheim, Norway
| | - Anne Mari A Rokstad
- Centre of Molecular Inflammation Research (CEMIR), Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Prinsesse Kristinas gt.1, NO-7491 Trondheim, Norway
| | - José Oberholzer
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
- Department of Visceral Surgery and Transplantation, University Hospital Zurich, Raemistrasse 100, 8091 Zurich, Switzerland
| | - Vladimír Raus
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Igor Lacík
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
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Guerrero JD, Arias ER, Gutierrez LB. Enhancing copper and lead adsorption in water by in-situ generation of calcium carbonate on alginate/chitosan biocomposite surfaces. Int J Biol Macromol 2024; 266:131110. [PMID: 38522694 DOI: 10.1016/j.ijbiomac.2024.131110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/29/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
Chitosan (CS) and sodium alginate (SA)-based biocomposites (CSA) were prepared with the in-situ generation of Calcium Carbonate (CSAX_Ca) through a simple, straightforward, economical, and eco-friendly procedure. Different drying conditions (X) were tested to achieve suitable structural and surface characteristics to enhance adsorption capacity: freeze-dried (L), vacuum-dried with methanol (M), and freeze-dried + vacuum-dried with methanol (LM). Temperature and adsorbent dosage effects on the adsorption capacity of Cu2+ or Pb2+ were examined. Results showed that the higher-yielding biocomposite (CSALM_Ca) exhibited rapid adsorption and good diffusion properties, achieving removal above 90 % within contaminant initial concentration ranges of 10-100 mg/L. At 35 °C, a pseudo-second-order kinetic and the Langmuir model effectively described kinetics and isotherms, revealing maximum adsorption (qe, max) of 429 mgCu2+/L and 1742 mgPb2+/g. Characterization through FTIR, XRD, and SEM of the as-prepared adsorbents confirmed the presence of CaCO3 in vaterite and calcite forms and the influence of drying conditions on the material morphology. Post-adsorption material characterization, in combination with adsorption findings, revealed chemisorption processes involving Ca2+ ion exchange for Cu2+ or Pb2+, resulting in surface-insoluble compounds. The best-performing material showed that after three reuse cycles, the removal of Cu2+ and Pb2+ decreased to 75 % and 62 %, respectively.
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Affiliation(s)
- Jhonnys D Guerrero
- Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE, (FIQ, UNL-CONICET), Santiago del Estero 2829, S3000 Santa Fe, Argentina
| | - Eduardo Rada Arias
- Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE, (FIQ, UNL-CONICET), Santiago del Estero 2829, S3000 Santa Fe, Argentina
| | - Laura B Gutierrez
- Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE, (FIQ, UNL-CONICET), Santiago del Estero 2829, S3000 Santa Fe, Argentina.
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Hussein Al-Assady NA, Badran HA, Kamil SA, Abo-Alhal RC. Preparation and evaluation in vitro release of sodium alginate/chitosan polyelectrolyte microparticles containing rifampicin and theoretical study using DFT methods. J Biomol Struct Dyn 2024; 42:1795-1811. [PMID: 37139549 DOI: 10.1080/07391102.2023.2202279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 04/08/2023] [Indexed: 05/05/2023]
Abstract
In this work, rifampicin-loaded sodium alginate/chitosan polyelectrolyte microparticles were prepared by the ionotropic gelation technique using CaCl2 as a cross-linking agent. The influence of different sodium alginate and chitosan concentrations on particle size, surface properties, and in vitro release behavior was studied. An infrared spectroscopy investigation verified the lack of any drug-polymer interaction. The microparticles prepared using (30, 50) mg of sodium alginate were spherical while when using 75 mg of sodium alginate, vesicles with round heads and tapered tails were formed. The results showed that the microparticle diameters were between (11.872-35.3645) µm. The amount of rifampicin released and the kinetics of drug release from microparticles were studied, and the results showed that by increasing the concentration of the polymer, the release of the rifampicin from the microparticles decreased. The findings showed that rifampicin release followed zero-order kinetics and that drug release from these particles is frequently influenced by diffusion. The electronic structure and characteristics of the conjugated polymers (sodium alginate/Chitosan) were examined using density functional theory (DFT) and PM3 calculations with Gaussian 9, using the B3LYP, and electronic structure calculations using 6-311 G (d,p). The HOMO and LUMO energy levels are determined as the HOMO's maximum and the LUMO's minimum, respectively.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | - Hussain A Badran
- Department of Physics, College of Education for Pure Science, University of Basrah, Basrah, Iraq
| | - Sarah A Kamil
- Department of Chemistry, College of Education for Pure Science, University of Basrah, Basrah, Iraq
| | - Ryadh Ch Abo-Alhal
- Department of Physics, College of Education for Pure Science, University of Basrah, Basrah, Iraq
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4
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Daus F, Xie X, Geyer A. The silica mineralisation properties of synthetic Silaffin-1A 1 ( synSil-1A 1). Org Biomol Chem 2022; 20:3387-3396. [PMID: 35362502 DOI: 10.1039/d2ob00390b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthetic monodisperse pentadecapeptide synSil-1A1 is a representative of the microdisperse mixture of the native silaffin natSil-1A1 produced by the diatom Cylindrotheca fusiformis. The octaphosphorylated zwitterionic synSil-1A1 is able to mineralise silica under slightly acidic conditions at pH 5.5, which is the physiologically relevant pH range assumed. Like the posttranslational modifications of the native silaffins, synSil-1A1 is functionalised on all four lysine and phosphorylated on all seven serine residues. We describe the synthesis of a trimethyl-δ-hydroxy-L-lysine building block, the incorporation of this choline-type amino acid in peptide synthesis and its phosphorylation, together with all further posttranslational modifications observed in the native silaffins. Quantitative structure-activity relationships from silicification experiments at high dilution reveal the unique mineralisation properties of the hyperphosphorylated peptide as a single substance and in interaction with long-chain polyamines (LCPA). Diffusion-ordered spectroscopy (DOSY) experiments reveal the formation of polyelectrolyte complexes (PEC) between synSil-1A1 and long-chain polyamines, which promotes the silicification process. The microdroplets have an overall balanced ratio of 100-150 cationic and the same number of anionic charges. The unique zwitterionic synSil-1A1 confirms the prevailing molecular model of biosilicification and validates it with quantitative data based on a single phosphopeptide species, avoiding the usual unphysiologically high concentrations of phosphate of many previous in vitro silicification experiments.
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Affiliation(s)
- Fabian Daus
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany.
| | - Xiulan Xie
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany.
| | - Armin Geyer
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany.
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5
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DNA penetration into a monolayer of amphiphilic polyelectrolyte. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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George LH, Arakkal A, Sreedharan P, Sailaja GS. Injectable polyelectrolyte complex-nascent HAP biodegradable antibiotic delivery system for the treatment of osteomyelitis. Biomed Mater 2021; 17. [PMID: 34753122 DOI: 10.1088/1748-605x/ac37c5] [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: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 11/11/2022]
Abstract
An injectable osteoconductive polyelectrolyte complex -hydroxyapatite formulation capable of controlled delivery of ciprofloxacin has been developed from a novel biodegradable polyelectrolyte complex and antibiotic loaded nascent hydroxyapatite (n-HAP) for the treatment of osteomyelitis. A single source (chitosan) derived polyelectrolytes were complexed in situ in the presence of n-HAP, pre-loaded with ciprofloxacin. The PEC- (n-HAP) nanoformulation (HPEC) was characterized by FT-IR, XRD, TGA and TEM analyses. HPEC combines functionalities of n-HAP (crystallinity and osteoconductivity) as well as PEC (biodegradable hydrophilic electrostatically bound macromolecular network) imparting better control over swelling and degradation kinetics favourable for drug release and transport of micronutrients. MTT assay and cytoskeleton staining (MG 63 cells) established cytocompatibility of HPEC. Early biomimetic mineralization of apatite was manifested under simulated physiological condition with a Ca/P of 1.23 (day 3) and 1.55 (day 6) complimented by in vitro biomineralization of MG-63 and Human Osteosarcoma (HOS) cells in a week (Alizarin Red S staining), which was further validated by calcium quantification. Antibacterial efficacy of HPEC has been evaluated by delivery kinetics of ciprofloxacin and by disc diffusion method against S. aureus and E. coli. The injectable system therefore possesses unique combination of functionalities: osteoconduction enriched with early biomineralization, antibacterial activity and is biodegradable; hence highly suitable for osteomyelitis treatment.
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Affiliation(s)
- Liz Hannah George
- Cochin University of Science and Technology, Department of Polymer Science and Rubber Technology, KOCHI, Kerala, 682022, INDIA
| | - Aswin Arakkal
- Cochin University of Science and Technology, Department of Polymer Science and Rubber Technology, CUSAT, KOCHI, Kerala, 682022, INDIA
| | - Prathapan Sreedharan
- Department of Applied Chemistry, Cochin University of Science and Technology, CUSAT, KOCHI, Kerala, 682022, INDIA
| | - G S Sailaja
- Department of Polymer Science and Technology, Cochin University of Science and Technology, Cochin 22, KOCHI, KOCHI, Kerala, 682022, INDIA
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Guerle-Cavero R, Lleal-Fontàs B, Balfagón-Costa A. Creation of Ionically Crosslinked Tri-Layered Chitosan Membranes to Simulate Different Human Skin Properties. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1807. [PMID: 33917479 PMCID: PMC8038782 DOI: 10.3390/ma14071807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/23/2021] [Accepted: 04/02/2021] [Indexed: 02/02/2023]
Abstract
In 2023, new legislation will ban the use of animals in the cosmetic industry worldwide. This fact, together with ethical considerations concerning the use of animals or humans in scientific research, highlights the need to propose new alternatives for replacing their use. The aim of this study is to create a tri-layered chitosan membrane ionically crosslinked with sodium tripolyphosphate (TPP) in order to simulate the number of layers in human skin. The current article highlights the creation of a membrane where pores were induced by a novel method. Swelling index, pore creation, and mechanical property measurements revealed that the swelling index of chitosan membranes decreased and, their pore formation and elasticity increased with an increase in the Deacetylation Grade (DDA). Additionally, the results demonstrate that chitosan's origin can influence the elastic modulus value and reproducibility, with higher values being obtained with seashell than snow crab or shrimp shells. Furthermore, the data show that the addition of each layer, until reaching three layers, increases the elastic modulus. Moreover, if layers are crosslinked, the elastic modulus increases to a much greater extent. The characterization of three kinds of chitosan membranes was performed to find the most suitable material for studying different human skin properties.
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Affiliation(s)
- Rocío Guerle-Cavero
- Pharmaceutical Chemistry Research Group, Instituto Químico de Sarriá, 08017 Barcelona, Spain; (B.L.-F.); (A.B.-C.)
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Robinson TM, Talebian S, Foroughi J, Yue Z, Fay CD, Wallace GG. Fabrication of Aligned Biomimetic Gellan Gum-Chitosan Microstructures through 3D Printed Microfluidic Channels and Multiple In Situ Cross-Linking Mechanisms. ACS Biomater Sci Eng 2020; 6:3638-3648. [PMID: 33463177 DOI: 10.1021/acsbiomaterials.0c00260] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In this study we use a combination of ionic- and photo-cross-linking to develop a fabrication method for producing biocompatible microstructures using a methacrylated gellan gum (a polyanion) and chitosan (a polycation) in addition to lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) as the photoinitiator. This work involves the development of a low-cost, portable 3D bioprinter and a customized extrusion mechanism for controlled introduction of the materials through a 3D printed microfluidic nozzle, before being cross-linked in situ to form robust microstructure bundles. The formed microstructures yielded a diameter of less than 1 μm and a tensile strength range of ∼1 MPa. This study is the first to explore and achieve GGMA:CHT microstructure fabrication by means of controlled in-line compaction and photo-cross-linking through 3D printed microfluidic channels.
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Affiliation(s)
- Thomas M Robinson
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science (ACES), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Innovation Campus, Wollongong, NSW 2522, Australia
| | - Sepehr Talebian
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science (ACES), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Innovation Campus, Wollongong, NSW 2522, Australia.,Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, NSW 2522, Australia
| | - Javad Foroughi
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science (ACES), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Innovation Campus, Wollongong, NSW 2522, Australia.,School of Electrical, Computer and Telecommunications Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Zhilian Yue
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science (ACES), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Innovation Campus, Wollongong, NSW 2522, Australia
| | - Cormac D Fay
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science (ACES), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Innovation Campus, Wollongong, NSW 2522, Australia.,SMART Infrastructure Facility, Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Gordon G Wallace
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science (ACES), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Innovation Campus, Wollongong, NSW 2522, Australia
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9
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Shabani A, Atyabi F, Khoshayand MR, Mahbod R, Cohan RA, Akbarzadeh I, Bakhshandeh H. Design of Experiment, Preparation, and in vitro Biological Assessment of Human Amniotic Membrane Extract Loaded Nanoparticles. Curr Pharm Biotechnol 2020; 21:256-267. [DOI: 10.2174/1389201020666191019122130] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 09/15/2019] [Accepted: 10/02/2019] [Indexed: 01/25/2023]
Abstract
Background:
Human amniotic membrane grafting could be potentially useful in ocular surface
complications due to tissue similarity and the presence of factors that reduce inflammation, vascularization,
and scarring. However, considerations like donor-derived infectious risk and the requirement
of an invasive surgery limit the clinical application of such treatments. Moreover, the quick depletion
of bioactive factors after grafting reduces the efficacy of treatments. Therefore, in the current
study, the possibility of nano delivery of the bioactive factors extracted from the human amniotic
membrane to the ocular surface was investigated.
Materials and methods:
Nanoparticles were prepared using polyelectrolyte complexation from chitosan
and dextran sulfate. The effect of polymer ratio, pH, and the amount of extract on particle size
and encapsulation efficacy were studied using Box-Behnken response surface methodology.
Results:
The optimum condition was obtained as follows: 4.9:1 ratio of dextran sulfate to chitosan, 600
µL amniotic membrane extract, and pH of 6. The prepared nanoparticles had an average size of 213
nm with 77% encapsulation efficacy. In the release test, after 10 days, approximately 50% of entrapped
bioactive proteins were released from the nanocarriers in a controlled manner. Biological activity assessment
on endothelial cells revealed amniotic membrane extract loaded nanoparticles had a longer
and significant increase in anti-angiogenic effect when compared to the control.
Conclusion:
Our data elucidate the ability of nanotechnology in ocular targeted nano delivery of bioactive
compounds.
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Affiliation(s)
- Avishan Shabani
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Atyabi
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad R. Khoshayand
- Department of Drug and Food Control, Faculty of Pharmacy and Pharmaceutical Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Mahbod
- Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
| | - Reza A. Cohan
- Nanobiotechnology Department, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran
| | - Iman Akbarzadeh
- Department of Chemical and Petrochemical Engineering, Sharif University of Technology, Tehran, Iran
| | - Haleh Bakhshandeh
- Nanobiotechnology Department, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran
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Atakay M, Aksakal F, Bozkaya U, Salih B, Wesdemiotis C. Conformational Characterization of Polyelectrolyte Oligomers and Their Noncovalent Complexes Using Ion Mobility-Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:441-449. [PMID: 32031387 DOI: 10.1021/jasms.9b00135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Poly-l-lysine (PLL), polystyrenesulfonate (PSS), and a mixture of these polyelectrolytes were investigated by electrospray ionization ion mobility mass spectrometry. The IM step confirmed the formation of noncovalent (i.e., supramolecular) complexes between these polyelectrolytes, which were detected in various charge states and stoichiometries in the presence of their constituents. Experimental and theoretical collision cross sections (CCSs) were derived for both PLL and PSS oligomers as well as their noncovalent assemblies. PSS chains showed higher compactness with increasing size as compared to PLL chains, indicating that the intrinsic conformations of the polyelectrolytes depend on the nature of the functional groups on their side chains. The CCS data for the noncovalent complexes further revealed that assemblies with higher PLL content have higher CCS values than other compositions of similar mass and that PLL-PSS complex formation is accompanied by significant size contraction.
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Affiliation(s)
- Mehmet Atakay
- Department of Chemistry , Hacettepe University , 06800 Ankara , Turkey
| | - Fatma Aksakal
- Department of Chemistry , Hacettepe University , 06800 Ankara , Turkey
| | - Uğur Bozkaya
- Department of Chemistry , Hacettepe University , 06800 Ankara , Turkey
| | - Bekir Salih
- Department of Chemistry , Hacettepe University , 06800 Ankara , Turkey
| | - Chrys Wesdemiotis
- Department of Chemistry , The University of Akron , Akron , Ohio 44325 , United States
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11
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Preparation and Characterization of Chitosan–Alginate Polyelectrolyte Complexes Loaded with Antibacterial Thyme Oil Nanoemulsions. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9183933] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Biomedical industries are attempting to utilize natural materials, as they are bio-compatible, non-toxic, and show bioactive properties, like antimicrobial activity. In this study, natural polyelectrolyte complexed chitosan/alginate films (PECs) were prepared via a casting/solvent evaporation technique, and their characteristics and drug release properties were investigated. PEC films made with two different overall polymer contents, 0.4 and 1 w/v%, were loaded with thyme oil nanoemulsion as drug carrier. The structure of the films was studied by FTIR and optical and scanning electron microscopy. Prepared PEC films had good mechanical and water vapor permeability properties. Release of the thyme oil from the pH-sensitive PEC films (TM-PEC) was detected and followed by UV spectroscopy. The results indicated that the drug release rate of TM-PEC films was the fastest when the chitosan content was 1 %w/v, and various mathematical models were analyzed for investigating the drug release mechanism. Antibacterial tests were performed by counting the number of surviving gram-negative and gram-positive bacteria. The in vitro test indicated the limitation Escherichia coli (E. coli) and Staphylococcus aureus (S.aureus) growth in the presence of TM-PEC films. The MTT test showed more cell viability of the TM-PEC film in comparison with that of the PEC film without TM. Based on the measured physical and antibacterial properties, the chitosan–alginate PEC films loaded with antibacterial essential oils can be considered for biomedical applications, such as wound dressings or controlled release systems.
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12
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Lopes IS, Michelon M, Forster TC, Cunha RL, Picone CS. Effect of chitosan size on destabilization of oil/water emulsions stabilized by whey protein. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Rubinstein M, Liao Q, Panyukov S. Structure of Liquid Coacervates formed by Oppositely Charged Polyelectrolytes. Macromolecules 2018; 51:9572-9588. [PMID: 30853717 PMCID: PMC6402498 DOI: 10.1021/acs.macromol.8b02059] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We develop a scaling theory and perform molecular dynamic simulations of weakly interacting coacervates with electrostatic interaction energy per charge less than thermal energy kT. Such liquid coacervates formed by oppositely charged polyelectrolytes can be asymmetric in charge density and number of charges per chain. We predict that these coacervates form interpenetrating solutions with two correlation lengths and two qualitatively different types of conformations of polyelectrolytes with lower and higher charge densities, which are analogous to chain conformations in quasi-neutral and in polyelectrolyte solutions, respectively. Weaker charged chains are attracted to and adsorbed on stronger charged chains forming a screening "coat" around the stronger charged polyelectrolytes. Salt added at lower concentrations screens the repulsion between stronger charged chains, thereby reducing the thickness of the screening coat and resulting in the non-zero net polymer charge in the coacervate. At higher salt concentrations salt screens the attraction between oppositely charged chains, decreasing the coacervate concentration and its polymeric charge density. Thus, we predict a non-monotonic salt concentration dependence of polymeric charge density for asymmetric coacervates. Phase diagram for a mixture of oppositely charged polyelectrolytes at various compositions is proposed for different salt concentrations.
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Affiliation(s)
- Michael Rubinstein
- Departments of Mechanical Engineering and Materials Science, Biomedical Engineering, Physics, and Chemistry, Duke University, Durham, NC 27708, United States
| | - Qi Liao
- Institute of Chemistry of the Chinese Academy of Sciences, Beijing, 100080, P. R., China
| | - Sergey Panyukov
- P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow, 117924, Russia
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14
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Maslova OV, Senko OV, Efremenko EN. Aspartic and glutamic acids polymers: preparation and applications in medicinal chemistry and pharmaceutics. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2115-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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15
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Siyawamwaya M, du Toit LC, Kumar P, Choonara YE, Kondiah PPPD, Pillay V. 3D printed, controlled release, tritherapeutic tablet matrix for advanced anti-HIV-1 drug delivery. Eur J Pharm Biopharm 2018; 138:99-110. [PMID: 29655904 DOI: 10.1016/j.ejpb.2018.04.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 01/07/2023]
Abstract
PURPOSE A 3D-Bioplotter® was employed to 3D print (3DP) a humic acid-polyquaternium 10 (HA-PQ10) controlled release fixed dose combination (FDC) tablet comprising of the anti-HIV-1 drugs, efavirenz (EFV), tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC). METHODS Chemical interactions, surface morphology and mechanical strength of the FDC were ascertained. In vitro drug release studies were conducted in biorelevant media followed by in vivo study in the large white pigs, in comparison with a market formulation, Atripla®. In vitro-in vivo correlation of results was undertaken. RESULTS EFV, TDF and FTC were successfully entrapped in the 24-layered rectangular prism-shaped 3DP FDC with a loading of ∼12.5 mg/6.3 mg/4 mg of EFV/TDF/FTC respectively per printed layer. Hydrogen bonding between the EFV/TDF/FTC and HA-PQ10 was detected which was indicative of possible drug solubility enhancement. The overall surface of the tablet exhibited a fibrilla structure and the 90° inner pattern was determined to be optimal for 3DP of the FDC. In vitro and in vivo drug release profiles from the 3DP FDC demonstrated that intestinal-targeted and controlled drug release was achieved. CONCLUSION A 3DP FDC was successfully manufactured with the aid of a 3D-Bioplotter in a single step process. The versatile HA-PQ10 entrapped all drugs and achieved an enhanced relative bioavailability of EFV, TDF, and FTC compared to the market formulation for potentially enhanced HIV treatment.
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Affiliation(s)
- Margaret Siyawamwaya
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa
| | - Lisa C du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa
| | - Yahya E Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa
| | - Pierre P P D Kondiah
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
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16
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Gai M, Frueh J, Kudryavtseva VL, Yashchenok AM, Sukhorukov GB. Polylactic Acid Sealed Polyelectrolyte Multilayer Microchambers for Entrapment of Salts and Small Hydrophilic Molecules Precipitates. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16536-16545. [PMID: 28452456 DOI: 10.1021/acsami.7b03451] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Efficient depot systems for entrapment and storage of small water-soluble molecules are of high demand for wide variety of applications ranging from implant based drug delivery in medicine and catalysis in chemical processes to anticorrosive systems in industry where surface-mediated active component delivery is required on a time and site specific manner. This work reports the fabrication of individually sealed hollow-structured polyelectrolyte multilayer (PEM) microchamber arrays based on layer-by-layer self-assembly as scaffolds and microcontact printing. These PEM chambers are composed out of biocompatible polyelectrolytes and sealed by a monolayer of hydrophobic biocompatible and biodegradable polylactic acid (PLA). Coating the chambers with hydrophobic PLA allows for entrapment of a microair-bubble in each chamber that seals and hence drastically reduces the PEM permeability. PLA@PEM microchambers are proven to enable prolonged subaqueous storage of small hydrophilic salts and molecules such as crystalline NaCl, doxicycline, and fluorescent dye rhodamine B. The presented microchambers are able to entrap air bubbles and demonstrate a novel strategy for entrapment, storage, and protection of micropackaged water-soluble substances in precipitated form. These chambers allow triggered release as demonstrated by ultrasound responsiveness of the chambers. Low-frequency ultrasound exposure is utilized for microchamber opening and payload release.
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Affiliation(s)
- Meiyu Gai
- School of Engineering and Materials Science, Queen Mary University of London , Mile End, Eng, 215, London E1 4NS, United Kingdom
| | - Johannes Frueh
- State Key laboratory of Micro/Nano Technology Research Centre, Harbin Institute of Technology , Yikuang Street 2, Harbin 150080, China
| | - Valeriya L Kudryavtseva
- RASA Center in Tomsk, Department of Experimental Physics, National Research Tomsk Polytechnic University , Tomsk 634050, Russia
| | - Alexey M Yashchenok
- Remote Controlled Theranostic Systems Lab, Educational Research Institute of Nanostructures and Biosystem, Saratov State University , 83 Astrakhanskaya Street, Saratov 410012, Russia
| | - Gleb B Sukhorukov
- School of Engineering and Materials Science, Queen Mary University of London , Mile End, Eng, 215, London E1 4NS, United Kingdom
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