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Angelescu DG. Molecular modeling of the carbohydrate corona formation on a polyvinyl chloride nanoparticle and its impact on the adhesion to lipid bilayers. J Chem Phys 2024; 160:144901. [PMID: 38591687 DOI: 10.1063/5.0198254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 03/21/2024] [Indexed: 04/10/2024] Open
Abstract
The pervasive presence of nanoplastics (NPs) in the environment has gained increasing attention due to their accumulation in living organisms. These emerging contaminants inevitably interact with extracellular polymeric substances along respiratory or gastrointestinal tracts, and diverse organic coating on the surface of NPs, known as bio- or eco-corona, is formed. Although its impact on altering the NP properties and potential cell internalization has been extensively examined, studies on its role in NP partitioning in the cell membrane are elusive yet. In this work, molecular dynamics is used to investigate the formation of chitosan (CT) corona centered on a polyvinyl chloride (PVC) nanoparticle and the uptake of the resulting complex onto lipid membranes. Coarse-grained models compatible with the newly developed Martini 3.0 force field are implemented for the two polymers employing the atomistic properties as targets in the parameterization. The reliability of the coarse-grained polymer models is demonstrated by reproducing the structural properties of the PVC melt and of solvated CT strands, as well as by determining the conformation adopted by the latter at the NP surface. Results show that the spontaneous binding of CT chains of high and intermediate protonation degrees led to the formation of soft and hard corona that modulates the interaction of PVC core with model membranes. The structural changes of the corona adsorbed at the lipid-water interface enable a subsequent transfer of the NP to the center of the saturated lipid membranes and a complete or partial transition to a snorkel conformation depending on the hydrophilic/hydrophobic balance in the CT-PVC complex. Overall, the computational investigation of the coarse-grained model system provides implications for understanding how the eco-corona development influences the uptake and implicit toxicology of NPs.
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Affiliation(s)
- Daniel G Angelescu
- Romanian Academy, "Ilie Murgulescu" Institute of Physical Chemistry, Splaiul Independentei 202, 060021 Bucharest, Romania
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2
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Zaib S, Shah HS, Khan I, Jawad Z, Sarfraz M, Riaz H, Asjad HMM, Ishtiaq M, Ogaly HA, Othman G, Ahmed DAEM. Fabrication and evaluation of anticancer potential of diosgenin incorporated chitosan-silver nanoparticles; in vitro, in silico and in vivo studies. Int J Biol Macromol 2024; 254:127975. [PMID: 37944715 DOI: 10.1016/j.ijbiomac.2023.127975] [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: 08/09/2023] [Revised: 10/22/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
The discovery of effective therapeutic approaches with minimum side effects and their tendency to completely eradicate the disease is the main challenge in the history of cancer treatment. Fenugreek (FGK) seeds are a rich source of phytochemicals, especially Diosgenin (DGN), which shows outstanding anticancer activities. In the present study, chitosan-silver nanoparticles (ChAgNPs) containing Diosgenin (DGN-ChAgNPs) were synthesized and evaluated for their anticancer activity against breast cancer cell line (MCF-7). For the physical characterization, the hydrodynamic diameter and zeta potential of DGN-ChAgNPs were determined to be 160.4 ± 12 nm and +37.19 ± 5.02 mV, respectively. Transmission electron microscopy (TEM) showed that nanoparticles shape was mostly round with smooth edges. Moreover, DGN was efficiently entrapped in nanoformulation with good entrapment efficacy (EE) of ~88 ± 4 %. The in vitro anti-proliferative activity of DGN-ChAgNPs was performed by sulforhodamine B (SRB) assay with promising inhibitory concentration of 6.902 ± 2.79 μg/mL. DAPI staining, comet assay and flow cytometry were performed to validate the anticancer potential of DGN-ChAgNPs both qualitatively and quantitatively. The percentage of survival rate and tumor reduction weight was evaluated in vivo in different groups of mice. Cisplatin was used as a standard anticancer drug. The DGN-ChAgNPs (12.5 mg/kg) treated group revealed higher percentage of survival rate and tumor reduction weight as compared to pure DGN treated group. These findings suggest that DGN-ChAgNPs could be developed as potential treatment therapy for breast cancer.
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Affiliation(s)
- Sumera Zaib
- Department of Basic and Applied Chemistry, Faculty of Science and Technology, University of Central Punjab, Lahore 54590, Pakistan.
| | - Hamid Saeed Shah
- Institute of Pharmaceutical Sciences, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan.
| | - Imtiaz Khan
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom.
| | - Zobia Jawad
- Ladywillingdon Hospital, King Edward Medical University, Lahore, Pakistan
| | - Muhammad Sarfraz
- College of Pharmacy, Al Ain University, Al Ain 64141, United Arab Emirates
| | - Huma Riaz
- Department of Basic and Applied Chemistry, Faculty of Science and Technology, University of Central Punjab, Lahore 54590, Pakistan
| | - Hafiz Muhammad Mazhar Asjad
- Department of Pharmaceutical Sciences, Faculty of Biomedical Sciences and Engineering, Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology, Mang, Khanpur Road, Haripur, KPK, Pakistan
| | - Memoona Ishtiaq
- Leads College of Pharmacy, Lahore LEADS University, Lahore, Pakistan
| | - Hanan A Ogaly
- Chemistry Department, College of Science, King Khalid University, Abha 61421, Saudi Arabia
| | - Gehan Othman
- Biology Department, College of Science, King Khalid University, Abha 61421, Saudi Arabia
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3
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García-Jiménez A, Román-Guerrero A, Pérez-Alonso C, Fouconnier B. Liquid-liquid and liquid-solid separation in self-assembled chitosan-alginate and chitosan-pectin complexes. Int J Biol Macromol 2022; 223:1368-1380. [PMID: 36395941 DOI: 10.1016/j.ijbiomac.2022.11.091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/14/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
The complexation between two oppositely charged polyelectrolytes (PE) can lead liquid-liquid (complex coacervates, CC) or liquid-solid (solid precipitates, SP) phase separations. Herein, the effect of pH (2-11) and ionic strength (I, 0.05-1.0 M KCl) on the associative interactions between chitosan (QL)-alginate (SA) and QL-Pectin (Pec), polysaccharides widely used in biotechnology field, is described. pH and I, exhibited significant effect on the structure and phase transitions by modifying the ionization degree (α), pka, and associative interactions between PE. Onset of binding was established at pHc 9, while continued acidification (pHτ 5.8) led to simultaneous CC and SP exhibiting a maximum turbidity in both systems. At pHδ 4.0, QL-Pec showed preferably CC structures whereas QL-SA maintained the CC and SP structures. At pHω 2, the associative interactions were suppressed due to the low ionization of Pec and SA. I (1.0 M) significantly diminished the interactions in QL-Pec due to charge screening. Molecular weight, second virial coefficient, hydrodynamic size, ionizable groups, and persistence length of polyion, influenced on the phase behavior of QL-Pec and QL-SA systems. Therefore, CC and SP are found simultaneously in both systems, their transitions can be modulated by intrinsic and environmental conditions, expanding the functional properties of complexed polysaccharides.
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Affiliation(s)
- Abraham García-Jiménez
- Departamento de Biotecnología, Universidad Autónoma Metropolitana Unidad Iztapalapa, Av. Ferrocarril de San Rafael Atlixco, 186, Col. Leyes de Reforma 1ª secc., C.P. 09340 Mexico City, Mexico
| | - Angélica Román-Guerrero
- Departamento de Biotecnología, Universidad Autónoma Metropolitana Unidad Iztapalapa, Av. Ferrocarril de San Rafael Atlixco, 186, Col. Leyes de Reforma 1ª secc., C.P. 09340 Mexico City, Mexico.
| | - César Pérez-Alonso
- Departamento de Ingeniería Química, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón esq. Paseo Tollocan s/n, Residencial Colón, C.P. 50120 Toluca, State of Mexico, Mexico
| | - Benoit Fouconnier
- Facultad de Ciencias Químicas, Universidad Veracruzana, Av. Universidad Veracruzana Km. 7.5, Col. Santa Isabel, C.P. 96538 Coatzacoalcos, Veracruz, Mexico
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Preparation and characterization of garlic polysaccharide-Zn (II) complexes and their bioactivities as a zinc supplement in Zn-deficient mice. Food Chem X 2022; 15:100361. [PMID: 36211731 PMCID: PMC9532731 DOI: 10.1016/j.fochx.2022.100361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 06/05/2022] [Accepted: 06/09/2022] [Indexed: 11/20/2022] Open
Abstract
Garlic polysaccharide-Zn (II) complexes were prepared. The structural characterization confirmed the formation of complexes. The complexes could significantly improve the health of Zn-deficient mice.
This study explored the potential of garlic polysaccharides (GPs) as a carrier for synthesizing GP-Zn (II) complexes to supplement Zn. According to the response surface analysis, the optimal preparation conditions were: mass ratio of GPs to Zn2+ 1:0.21, temperature 53 °C, pH 5.9 and time 148.75 min, with the maximum chelation rate of 90.11%. The chelation of GPs and Zn2+ involved O—H/C—O/O—C—O groups, increased crystallinity and altered absorption peaks of circular dichroism spectra, with a higher thermal stability, particle size and negative zeta potential. Compared with inorganic zinc salts, supplementation of GP-Zn (II) complexes showed enhance zinc supplementation effects in Zn-deficient mice model: increased body weight, organ index and Zn (II) levels in serum and liver, enhanced Superoxidedismutase (SOD) activity and alkaline phosphatase activity, decreased NO content and Malondialdehyde (MDA) content and improved colon and testicular morphology. Therefore, GP-Zn (II) complex can be used as a potential zinc supplement for Zn-deficient individuals.
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Hoffmann C, Jourdain M, Grandjean A, Titz A, Jung G. β-Boronic Acid-Substituted Bodipy Dyes for Fluorescence Anisotropy Analysis of Carbohydrate Binding. Anal Chem 2022; 94:6112-6119. [DOI: 10.1021/acs.analchem.1c04654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Caroline Hoffmann
- Biophysical Chemistry, Saarland University, Campus B2 2, 66123 Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - Matthias Jourdain
- Biophysical Chemistry, Saarland University, Campus B2 2, 66123 Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - Alexander Grandjean
- Biophysical Chemistry, Saarland University, Campus B2 2, 66123 Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - Alexander Titz
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, 66123 Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
- Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Gregor Jung
- Biophysical Chemistry, Saarland University, Campus B2 2, 66123 Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
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6
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Zhang H, Li R. Solution Properties. Food Hydrocoll 2021. [DOI: 10.1007/978-981-16-0320-4_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Nwokocha LM, Williams PA. Characterization of the polysaccharide from Cola millenii seeds. Int J Biol Macromol 2020; 161:643-647. [PMID: 32534093 DOI: 10.1016/j.ijbiomac.2020.06.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 06/04/2020] [Accepted: 06/08/2020] [Indexed: 11/26/2022]
Abstract
We have isolated and characterized a water soluble polysaccharide from Cola millenii seeds. It was found to be composed of a total of 59% neutral sugars (mainly rhamnose, galactose and arabinose ~24, 13 and 8% respectively) and 41% uronic acids [mainly galacturonic acid]. The weight and number average molar mass values were found to be 4.7 × 106 g/mol and 3.5 × 106 g/mol, respectively. The polysaccharide exhibited polyelectrolyte properties with the intrinsic viscosity varying with salt concentration. The polysaccharide formed a highly viscous solution in water with apparent zero shear viscosities of 0.59-772 Pa·s at concentrations 0.3-2.5 wt%. The solutions were shear thinning even at very low concentrations. The mechanical spectra showed gel-like characteristics at concentrations >2 wt%. The rheological behavior indicates the polysaccharide has potential for application as a thickener and suspending agent in food, pharmaceutical and cosmetic formulations.
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Affiliation(s)
| | - Peter A Williams
- Center for Water Soluble Polymers, Wrexham Glyndwr University, Wrexham LL 11 2AW, North Wales, UK.
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8
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Associative behaviour of κ-carrageenan in aqueous solutions and its modification by different monovalent salts as reflected by viscometric parameters. Int J Biol Macromol 2019; 140:661-667. [DOI: 10.1016/j.ijbiomac.2019.08.144] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/08/2019] [Accepted: 08/17/2019] [Indexed: 10/26/2022]
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9
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Vuillemin ME, Michaux F, Muniglia L, Linder M, Jasniewski J. Gum Arabic and chitosan self-assembly: Thermodynamic and mechanism aspects. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.05.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Kalina M, Kargerová A, Pekař M. DEAE-dextran hydrochloride behaviour in aqueous solution-The effect of ionic strength and concentration. Carbohydr Polym 2019; 220:163-169. [PMID: 31196536 DOI: 10.1016/j.carbpol.2019.05.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/05/2019] [Accepted: 05/18/2019] [Indexed: 11/19/2022]
Abstract
DEAE-dextran hydrochloride is a positively charged biocompatible polyelectrolyte. Its behaviour in aqueous solutions - the changes in its colloidal characteristics and resulting conformation changes - were investigated using a combination of light scattering, densitometry and ultrasound spectrometry. The results indicated the formation of a voluminous, hydrated and coiled conformation of chains having average particle sizes in the range of units of microns at low ionic strength. This phenomenon was supported by an increase in DEAE-dextran hydrochloride concentration in the solution. The increase in ionic strength caused the shielding of DEAE-dextran hydrochloride charges on its chain, resulting in the destabilization of the conformation arrangement of the polyelectrolyte and the formation of denser, more compact and stiffer structures having smaller particle sizes. The proposed model of DEAE-dextran hydrochloride density in the studied environments (distilled water, NaCl solutions) showed the possibility of using a single equation model to calculate the overall density of the system.
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Affiliation(s)
- Michal Kalina
- Brno University of Technology, Faculty of Chemistry, Materials Research Centre & Institute of Physical and Applied Chemistry, Purkyňova 118, 612 00, Brno, Czech Republic.
| | - Andrea Kargerová
- Brno University of Technology, Faculty of Chemistry, Materials Research Centre & Institute of Physical and Applied Chemistry, Purkyňova 118, 612 00, Brno, Czech Republic
| | - Miloslav Pekař
- Brno University of Technology, Faculty of Chemistry, Materials Research Centre & Institute of Physical and Applied Chemistry, Purkyňova 118, 612 00, Brno, Czech Republic
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11
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Hejjaji EMA, Smith AM, Morris GA. Evaluation of the mucoadhesive properties of chitosan nanoparticles prepared using different chitosan to tripolyphosphate (CS:TPP) ratios. Int J Biol Macromol 2018; 120:1610-1617. [PMID: 30282010 DOI: 10.1016/j.ijbiomac.2018.09.185] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 09/03/2018] [Accepted: 09/28/2018] [Indexed: 12/17/2022]
Abstract
Mucoadhesive molecules such as chitosan, can allow targeting of a particular tissue to prolong residence time and subsequently improve bioavailability. The purpose of this study was to investigate chitosan-tripolyphosphate (CS:TPP) nanoparticles and to evaluate the interaction between nanoparticles of different CS:TPP ratios with mucin using viscosity, particle size analysis and ζ-potential. For all CS:TPP ratios examined, a minimum value of viscosity was reached for a 3:1 CS:TPP ratio, however chitosan nanoparticles at this ratio were not stable (<+30 mV), whereas a CS:TPP ratio of 4:1 displayed the strongest interaction. This suggests a minimum CS:TPP ratio of 4:1 is required to produce stable nanoparticles able to form strong interactions, which is consistent with a greater mucin binding efficiencies at CS:TPP ratios of 4:1 and higher, which were quantified using a colorimetric assay. Further analysis of similar systems could lead potentially to tuneable chitosan nanoparticles for specific applications.
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Affiliation(s)
- Ezzeddin M A Hejjaji
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK; Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK
| | - Alan M Smith
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK
| | - Gordon A Morris
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK.
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12
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Alba K, Bingham RJ, Gunning PA, Wilde PJ, Kontogiorgos V. Pectin Conformation in Solution. J Phys Chem B 2018; 122:7286-7294. [DOI: 10.1021/acs.jpcb.8b04790] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- K. Alba
- Department of Biological Sciences, University of Huddersfield, Huddersfield HD1 3DH, U.K
| | - R. J. Bingham
- Department of Biological Sciences, University of Huddersfield, Huddersfield HD1 3DH, U.K
| | - P. A. Gunning
- Quadram Institute Bioscience, Norwich Research Park, Norwich NR4 7UA, U.K
| | - P. J. Wilde
- Quadram Institute Bioscience, Norwich Research Park, Norwich NR4 7UA, U.K
| | - V. Kontogiorgos
- Department of Biological Sciences, University of Huddersfield, Huddersfield HD1 3DH, U.K
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13
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Sims IM, Smith AM, Morris GA, Ghori MU, Carnachan SM. Structural and rheological studies of a polysaccharide mucilage from lacebark leaves (Hoheria populnea A. Cunn.). Int J Biol Macromol 2018; 111:839-847. [DOI: 10.1016/j.ijbiomac.2017.12.142] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 11/17/2017] [Accepted: 12/27/2017] [Indexed: 12/01/2022]
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14
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Chain conformation, rheological and charge properties of fucoidan extracted from sea cucumber Thelenota ananas: A semi-flexible coil negative polyelectrolyte. Food Chem 2017; 237:511-515. [DOI: 10.1016/j.foodchem.2017.05.103] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 04/17/2017] [Accepted: 05/18/2017] [Indexed: 11/20/2022]
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15
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Maciel VBV, Yoshida CMP, Pereira SMSS, Goycoolea FM, Franco TT. Electrostatic Self-Assembled Chitosan-Pectin Nano- and Microparticles for Insulin Delivery. Molecules 2017; 22:molecules22101707. [PMID: 29023400 PMCID: PMC6151702 DOI: 10.3390/molecules22101707] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 09/29/2017] [Accepted: 10/04/2017] [Indexed: 12/31/2022] Open
Abstract
A polyelectrolyte complex system of chitosan-pectin nano- and microparticles was developed to encapsulate the hormone insulin. The aim of this work was to obtain small particles for oral insulin delivery without chemical crosslinkers based on natural and biodegradable polysaccharides. The nano- and microparticles were developed using chitosans (with different degrees of acetylation: 15.0% and 28.8%) and pectin solutions at various charge ratios (n⁺/n- given by the chitosan/pectin mass ratio) and total charge. Nano- and microparticles were characterized regarding particle size, zeta potential, production yield, encapsulation efficiency, stability in different media, transmission electron microscopy and cytotoxicity assays using Caco-2 cells. The insulin release was evaluated in vitro in simulated gastric and intestinal media. Small-sized particles (~240-~1900 nm) with a maximum production yield of ~34.0% were obtained. The highest encapsulation efficiency (~62.0%) of the system was observed at a charge ratio (n⁺/n-) 5.00. The system was stable in various media, particularly in simulated gastric fluid (pH 1.2). Transmission electron microscopy (TEM) analysis showed spherical shape particles when insulin was added to the system. In simulated intestinal fluid (pH 6.8), controlled insulin release occurred over 2 h. In vitro tests indicated that the proposed system presents potential as a drug delivery for oral administration of bioactive peptides.
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Affiliation(s)
- Vinicius B V Maciel
- Faculty of Animal Science and Food Engineering, USP-University of São Paulo, Av. Duque de Caxias Norte, 225, Pirassununga CEP 13635-900, São Paulo, Brazil.
- School of Chemical Engineering, UNICAMP-State University of Campinas, Av. Albert Einstein, 500, Campinas CEP 13083-852, São Paulo, Brazil.
| | - Cristiana M P Yoshida
- Department of Exact and Earth Science, UNIFESP-Federal University of São Paulo, Rua São Nicolau, 210, Diadema CEP 09913-030, São Paulo, Brazil.
| | - Susana M S S Pereira
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Schlossgarten 3, 48149 Münster, Germany.
| | - Francisco M Goycoolea
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Schlossgarten 3, 48149 Münster, Germany.
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
| | - Telma T Franco
- School of Chemical Engineering, UNICAMP-State University of Campinas, Av. Albert Einstein, 500, Campinas CEP 13083-852, São Paulo, Brazil.
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16
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Skoglund S, Hedberg J, Yunda E, Godymchuk A, Blomberg E, Odnevall Wallinder I. Difficulties and flaws in performing accurate determinations of zeta potentials of metal nanoparticles in complex solutions—Four case studies. PLoS One 2017; 12:e0181735. [PMID: 28749997 PMCID: PMC5531457 DOI: 10.1371/journal.pone.0181735] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/06/2017] [Indexed: 11/18/2022] Open
Abstract
The zeta potential (ZP) is a parameter commonly used to characterize metal nanoparticles (NPs) in solution. Such determinations are for example performed in nanotoxicology since the ZP influences e.g. the interaction between cells and different biomolecules. Four case studies on different metal NPs (Cu and Zn NPs, and citrate capped Ag NPs) are presented in this study in order to provide guidance on how to accurately interpret and report ZP data. Solutions of high ionic strength (150 mM NaCl) induce a higher extent of particle agglomeration (elucidated with Ag NPs) when compared with conditions in 10 mM NaCl, which further complicates the prediction of the ZP due to e.g. sedimentation and broadening of the zeta potential distribution. The particle size is seldom included specifically in the standard ways of determining ZP (Hückel and Smoluchowski approximations). However corrections are possible when considering approximations of the Henry function. This was seen to improve the analysis of NPs, since there are cases when both the Hückel and the Smulochowski approximations are invalid. In biomolecule-containing cell media (BEGM), the signal from e.g. proteins may interfere with the measured ZP of the NPs. The intensity distribution of the ZP of both the blank solution and the solution containing NPs should hence be presented in addition to the mean value. Due to an increased ionic strength for dissolving of metal NPs (exemplified by Zn NPs), the released metal ions must be considered when interpreting the zeta potential measurements. In this work the effect was however negligible, as the particle size was several hundred nm, conditions that made the Smoluchowski approximation valid despite an increased ionic strength. However, at low ionic strengths (mM range) and small-sized NPs (tens of nm), the effect of released metal ions can influence the choice of model for determining the zeta potential. Sonication of particle dispersions influences not only the extent of metal release but also the outermost surface oxide composition, which often results in an increased ZP. Surface compositional changes were illustrated for sonicated and non-sonicated Cu NPs. In all, it can be concluded that accurate measurements and interpretations are possible in most cases by collecting and reporting complementary data on characteristics such as particle size, ZP distributions, blank sample information, and particle oxide composition.
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Affiliation(s)
- Sara Skoglund
- KTH Royal Institute of Technology, Division of Surface and Corrosion Science, School of Chemical Science and Engineering, Stockholm, Sweden
| | - Jonas Hedberg
- KTH Royal Institute of Technology, Division of Surface and Corrosion Science, School of Chemical Science and Engineering, Stockholm, Sweden
- * E-mail:
| | - Elena Yunda
- KTH Royal Institute of Technology, Division of Surface and Corrosion Science, School of Chemical Science and Engineering, Stockholm, Sweden
- National Research Tomsk Polytechnic University, Tomsk, Russia
| | - Anna Godymchuk
- National Research Tomsk Polytechnic University, Tomsk, Russia
- National University of Science and Technology “MISIS”, Moscow, Russia
| | - Eva Blomberg
- KTH Royal Institute of Technology, Division of Surface and Corrosion Science, School of Chemical Science and Engineering, Stockholm, Sweden
- RISE Research Institutes of Sweden, Chemistry, Materials and Surfaces, Borås, Sweden
| | - Inger Odnevall Wallinder
- KTH Royal Institute of Technology, Division of Surface and Corrosion Science, School of Chemical Science and Engineering, Stockholm, Sweden
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17
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Layer-by-Layer Assembly of Food-Grade Alginate/Chitosan Nanolaminates: Formation and Physicochemical Characterization. FOOD BIOPHYS 2017. [DOI: 10.1007/s11483-017-9486-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Hejjaji EM, Smith AM, Morris GA. Designing chitosan-tripolyphosphate microparticles with desired size for specific pharmaceutical or forensic applications. Int J Biol Macromol 2017; 95:564-573. [DOI: 10.1016/j.ijbiomac.2016.11.092] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 11/17/2016] [Accepted: 11/23/2016] [Indexed: 11/28/2022]
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Xu X, Xue C, Chang Y, Chen F, Wang J. Conformational and physicochemical properties of fucosylated chondroitin sulfate from sea cucumber Apostichopus japonicus. Carbohydr Polym 2016; 152:26-32. [DOI: 10.1016/j.carbpol.2016.06.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/04/2016] [Accepted: 06/15/2016] [Indexed: 10/21/2022]
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