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Javaid MA, Jabeen S, Arshad N, Zia KM, Hussain MT, Bhatti IA, Iqbal A, Ahmad S, Ullah I. Development of amylopectin based polyurethanes for sustained drug release studies. Int J Biol Macromol 2023:125224. [PMID: 37285893 DOI: 10.1016/j.ijbiomac.2023.125224] [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: 11/19/2022] [Revised: 05/28/2023] [Accepted: 06/02/2023] [Indexed: 06/09/2023]
Abstract
In this research work, the crosslinked structure of polyurethane has been exploited for sustained drug delivery. Polyurethane composites have been prepared by the reaction of isophorone diisocyanate (IPDI) and polycaprolactone diol (PCL), which were further extended by varying the mole ratios of amylopectin (AMP) and 1,4-butane diol (1,4-BDO) chain extenders. The progress and completion of the reaction of polyurethane (PU) were confirmed using Fourier Transform infrared (FTIR) and nuclear magnetic resonance (1H NMR) spectroscopic techniques. Gel permeation chromatography (GPC) analysis showed that the molecular weights of prepared polymers were increased with the addition of amylopectin into the PU matrix. The molecular weight of AS-4 (Mw ≈ 99,367) was found threefold as compared to amylopectin-free PU (Mw ≈ 37,968). Thermal degradation analysis was done using thermal gravimetric analysis (TGA) and inferred that AS-5 showed stability up to 600 °C which was the maximum among all PUs because AMP has a large number of -OH units for linking with prepolymer resulting in a more cross-linked structure which improved the thermal stability of the AS-5 sample. The samples prepared with AMP showed less drug release (<53 %) as compared to the PU sample prepared without AMP (AS-1).
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Affiliation(s)
- Muhammad Asif Javaid
- Department of Applied Sciences, National Textile University, Faisalabad 37610, Pakistan
| | - Sobia Jabeen
- Department of Chemistry, University of Agriculture, Faisalabad 38040, Pakistan
| | - Noureen Arshad
- Department of Applied Sciences, National Textile University, Faisalabad 37610, Pakistan; Liberty Mills Limited, Karachi 75700, Pakistan
| | - Khalid Mahmood Zia
- Department of Chemistry, Government College University, Faisalabad 38030, Pakistan; Department of Applied Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Muhammad Tahir Hussain
- Department of Applied Sciences, National Textile University, Faisalabad 37610, Pakistan.
| | - Ijaz Ahmed Bhatti
- Department of Chemistry, University of Agriculture, Faisalabad 38040, Pakistan
| | - Amer Iqbal
- Department of Applied Sciences, National Textile University, Faisalabad 37610, Pakistan
| | - Saliha Ahmad
- Department of Applied Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Inam Ullah
- Department of Applied Sciences, National Textile University, Faisalabad 37610, Pakistan
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Sarkar A, Roy S, Bhatia P, Jaiswal A. Quaternary ammonium substituted dextrin‐based biocompatible cationic nanoparticles with ultrahigh
pH
stability for drug delivery. J Appl Polym Sci 2023. [DOI: 10.1002/app.53626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ankita Sarkar
- School of Biosciences and Bioengineering Indian Institute of Technology Mandi Mandi India
| | - Shounak Roy
- School of Biosciences and Bioengineering Indian Institute of Technology Mandi Mandi India
| | - Prachi Bhatia
- School of Biosciences and Bioengineering Indian Institute of Technology Mandi Mandi India
| | - Amit Jaiswal
- School of Biosciences and Bioengineering Indian Institute of Technology Mandi Mandi India
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3
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Liu Z, Chen X, Wen Y, Bao C, Liu C, Cao S, Yan H, Lin Q. Chemical modification of alginate with tosylmethyl isocyanide, propionaldehyde and octylamine via the Ugi reaction for hydrophobic drug delivery. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03879-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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4
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Wu Z, Li H, Zhao X, Ye F, Zhao G. Hydrophobically modified polysaccharides and their self-assembled systems: A review on structures and food applications. Carbohydr Polym 2022; 284:119182. [DOI: 10.1016/j.carbpol.2022.119182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 12/27/2021] [Accepted: 01/21/2022] [Indexed: 01/05/2023]
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5
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Self-aggregate performance of hexyl alginate ester derivative synthesized via SN2 reaction for controlled release of λ-cyhalothrin. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04103-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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6
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Chen X, Zhu Q, Liu C, Li D, Yan H, Lin Q. Esterification of Alginate with Alkyl Bromides of Different Carbon Chain Lengths via the Bimolecular Nucleophilic Substitution Reaction: Synthesis, Characterization, and Controlled Release Performance. Polymers (Basel) 2021; 13:3351. [PMID: 34641167 PMCID: PMC8512272 DOI: 10.3390/polym13193351] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/25/2021] [Accepted: 09/28/2021] [Indexed: 12/27/2022] Open
Abstract
To extend the alginate applicability for the sustained release of hydrophobic medicine in drug delivery systems, the alkyl alginate ester derivative (AAD), including hexyl alginate ester derivative (HAD), octyl alginate ester derivative (OAD), decyl alginate ester derivative (DAD), and lauryl alginate ester derivative (LAD), were synthesized using the alkyl bromides with different lengths of carbon chain as the hydrophobic modifiers under homogeneous conditions via the bimolecular nucleophilic substitution (SN2) reaction. Experimental results revealed that the successful grafting of the hydrophobic alkyl groups onto the alginate molecular backbone via the SN2 reaction had weakened and destroyed the intramolecular hydrogen bonds, thus enhancing the molecular flexibility of the alginate, which endowed the AAD with a good amphiphilic property and a critical aggregation concentration (CAC) of 0.48~0.0068 g/L. Therefore, the resultant AAD could form stable spherical self-aggregated micelles with the average hydrodynamic diameter of 285.3~180.5 nm and zeta potential at approximately -44.8~-34.4 mV due to the intra or intermolecular hydrophobic associations. With the increase of the carbon chain length of the hydrophobic side groups, the AAD was more prone to self-aggregation, and therefore was able to achieve the loading and sustained release of hydrophobic ibuprofen. Additionally, the swelling and degradation of AAD microcapsules and the diffusion of the loaded drug jointly controlled the release rate of ibuprofen. Meanwhile, the AAD also displayed low cytotoxicity to the murine macrophage RAW264.7 cells. Thanks to the good amphiphilic property, colloidal interface activity, hydrophobic drug-loading performance, and cytocompatibility, the synthesized AAD exhibited a great potential for the development of hydrophobic pharmaceutical formulations.
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Affiliation(s)
- Xiuqiong Chen
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (X.C.); (Q.Z.)
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (C.L.); (D.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Qingmei Zhu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (X.C.); (Q.Z.)
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (C.L.); (D.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Chang Liu
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (C.L.); (D.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Dongze Li
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (C.L.); (D.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Huiqiong Yan
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (X.C.); (Q.Z.)
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (C.L.); (D.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Qiang Lin
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (X.C.); (Q.Z.)
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (C.L.); (D.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
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7
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Chen X, Zhu Q, Li Z, Yan H, Lin Q. The Molecular Structure and Self-Assembly Behavior of Reductive Amination of Oxidized Alginate Derivative for Hydrophobic Drug Delivery. Molecules 2021; 26:5821. [PMID: 34641365 PMCID: PMC8510318 DOI: 10.3390/molecules26195821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 11/16/2022] Open
Abstract
On account of the rigid structure of alginate chains, the oxidation-reductive amination reaction was performed to synthesize the reductive amination of oxidized alginate derivative (RAOA) that was systematically characterized for the development of pharmaceutical formulations. The molecular structure and self-assembly behavior of the resultant RAOA was evaluated by an FT-IR spectrometer, a 1H NMR spectrometer, X-ray diffraction (XRD), thermal gravimetric analysis (TGA), a fluorescence spectrophotometer, rheology, a transmission electron microscope (TEM) and dynamic light scattering (DLS). In addition, the loading and in vitro release of ibuprofen for the RAOA microcapsules prepared by the high-speed shearing method, and the cytotoxicity of the RAOA microcapsules against the murine macrophage RAW264.7 cell were also studied. The experimental results indicated that the hydrophobic octylamine was successfully grafted onto the alginate backbone through the oxidation-reductive amination reaction, which destroyed the intramolecular hydrogen bond of the raw sodium alginate (SA), thereby enhancing its molecular flexibility to achieve the self-assembly performance of RAOA. Consequently, the synthesized RAOA displayed good amphiphilic properties with a critical aggregation concentration (CAC) of 0.43 g/L in NaCl solution, which was significantly lower than that of SA, and formed regular self-assembled micelles with an average hydrodynamic diameter of 277 nm (PDI = 0.19) and a zeta potential of about -69.8 mV. Meanwhile, the drug-loaded RAOA microcapsules had a relatively high encapsulation efficiency (EE) of 87.6 % and good sustained-release properties in comparison to the drug-loaded SA aggregates, indicating the good affinity of RAOA to hydrophobic ibuprofen. The swelling and degradation of RAOA microcapsules and the diffusion of the loaded drug jointly controlled the release rate of ibuprofen. Moreover, it also displayed low cytotoxicity against the RAW264.7 cell, similar to the SA aggregates. In view of the excellent advantages of RAOA, it is expected to become the ideal candidate for hydrophobic drug delivery in the biomedical field.
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Affiliation(s)
- Xiuqiong Chen
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China;
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (Q.Z.); (Z.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Qingmei Zhu
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (Q.Z.); (Z.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Zhengyue Li
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (Q.Z.); (Z.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Huiqiong Yan
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China;
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (Q.Z.); (Z.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Qiang Lin
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China;
- Key Laboratory of Natural Polymer Functional Material of Haikou City, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; (Q.Z.); (Z.L.)
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
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8
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Zhang M, Zhao SX, Ding B, Zhang YQ. Sodium N-lauryl amino acids derived from silk protein can form catanionic aggregates with cytarabine as novel anti-tumor drug delivery systems. Drug Deliv 2020; 27:482-490. [PMID: 32212952 PMCID: PMC7170395 DOI: 10.1080/10717544.2020.1742250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A sodium N-lauryl amino acids (shortly silk sericin surfactant, SSS) is synthesized with lauryl chloride and sericin amino acids recovered from silk industrial waste. The purpose of this study is to explore whether the sericin surfactant can be used as a potential drug delivery carrier. By controlling the proportion of cationic drugs, cytarabine hydrochloride (CH) and anionic SSS, the aggregation behavior, slow release capability and toxicological effects of catanionic aggregates or vesicles, formed through CH and SSS, have been investigated in detail. Dynamic light scattering (DLS), transmission electron microscopy (TEM), and zeta potential analysis showed that the aggregate solution could form a stable vesicle structure when the mass fraction of CH is less than or equal to 0.3. The drug release results showed that the cumulative release rate of the catanionic aggregation solution with CH mass fraction of 0.2 reached a maximum at 18 h, being approximately 9 times greater than that of pure cytarabine. The CH/SSS aggregates had a significant sustained release effect compared with the control group. At the same time, vesicles formed by SSS and CH have better anti-tumor effects compared with the pure drug group. In summary, sericin surfactant from silk industrial waste has a potential use as a drug delivery carrier.
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Affiliation(s)
- Meng Zhang
- Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China.,National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, China
| | - Shu-Xiang Zhao
- Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China.,National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, China
| | - Biao Ding
- Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China.,National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, China
| | - Yu-Qing Zhang
- Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China.,National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, China
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9
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Pereira I, Fraga S, Maltez L, Requicha J, Guardão L, Oliveira J, Prada J, Alves H, Santos JD, Teixeira JP, Pereira JE, Soares R, Gama FM. In vivo systemic toxicity assessment of an oxidized dextrin-based hydrogel and its effectiveness as a carrier and stabilizer of granular synthetic bone substitutes. J Biomed Mater Res A 2019; 107:1678-1689. [PMID: 30920095 DOI: 10.1002/jbm.a.36683] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 02/25/2019] [Accepted: 03/22/2019] [Indexed: 11/11/2022]
Abstract
The worldwide incidence of bone disorders is raising, mainly due to aging population. The lack of effective treatments is pushing the development of synthetic bone substitutes (SBSs). Most ceramic-based SBSs commercially available display limited handling properties. Attempting to solve these issues and achieve wider acceptance by the clinicians, granular ceramics have been associated with hydrogels (HGs) to produce injectable/moldable SBSs. Dextrin, a low-molecular-weight carbohydrate, was used to develop a fully resorbable and injectable HG. It was first oxidized with sodium periodate and then cross-linked with adipic acid dihydrazide. The in vivo biocompatibility and safety of the dextrin-based HG was assessed by subacute systemic toxicity and skin sensitization tests, using rodent models. The results showed that the HG did not induce any systemic toxic effect, skin reaction, or genotoxicity, neither impaired the bone repair/regeneration process. Then, the HG was successfully combined with granular bone substitute, registered as Bonelike (250-500 μm) to obtain a moldable/injectable SBS, which was implanted in tibial fractures in goats for 3 and 6 weeks. The obtained results showed that HG allowed the stabilization of the granules into the defect, ensuring effective handling, and molding properties of the formulation, as well as an efficient cohesion of the granules. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1678-1689, 2019.
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Affiliation(s)
- Isabel Pereira
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Sónia Fraga
- Departamento de Saúde Ambiental, Instituto Nacional de Saúde Dr. Ricardo Jorge, 4000-053, Porto, Portugal.,EPIUnit - Instituto de Saúde Pública, Universidade do Porto, 4050-600, Porto, Portugal
| | - Luís Maltez
- CECAV - Animal and Veterinary Research Centre, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal.,Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal
| | - João Requicha
- Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal
| | - Luísa Guardão
- Animal House Unit, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal
| | - Joana Oliveira
- Animal House Unit, Faculty of Medicine, University of Porto, 4200-319, Porto, Portugal
| | - Justina Prada
- CECAV - Animal and Veterinary Research Centre, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal.,Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal
| | - Helena Alves
- Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Dr. Ricardo Jorge, 4000-053, Porto, Portugal
| | - José Domingos Santos
- REQUIMTE-LAQV, Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto, 4200-465, Portugal
| | - João Paulo Teixeira
- Departamento de Saúde Ambiental, Instituto Nacional de Saúde Dr. Ricardo Jorge, 4000-053, Porto, Portugal.,EPIUnit - Instituto de Saúde Pública, Universidade do Porto, 4050-600, Porto, Portugal
| | - José Eduardo Pereira
- CECAV - Animal and Veterinary Research Centre, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal.,Department of Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal
| | - Raquel Soares
- Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, i3S - Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, 4200-319, Portugal
| | - Francisco Miguel Gama
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
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Cerqueira MA, Pinheiro AC, Pastrana LM, Vicente AA. Amphiphilic Modified Galactomannan as a Novel Potential Carrier for Hydrophobic Compounds. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2019. [DOI: 10.3389/fsufs.2019.00017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kushwaha S, Maity A, Gangopadhyay M, Ravindranathan S, Rajamohanan PR, Das A. Cucurbit[7]uril Induced Formation of FRET-Enabled Unilamellar Lipid Vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10989-10999. [PMID: 28922602 DOI: 10.1021/acs.langmuir.7b02777] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A unique fluorescence resonance energy transfer (FRET) process is found to be operational in a unilamellar lipid self-assembly in the aqueous phase. A newly synthesized naphthyl based long chain lipid derivative [N-(naphthalene-1-ylmethyl)tetradecane-1-ammonium chloride, 14NA+] forms various self-assembled architectures in the aqueous phase. Controlled changes in lipid concentration lead to a transition of the self-assemblies from micelles to vesicles to rods. In the presence of cucurbit[7]uril (CB7), 14NA+ forms a host-guest [2]pseudorotaxane complex (CB7∋14NA+) and secondary interactions lead to the formation of a lipid bilayer with hydrophobic pockets situated in between the layers. The change in the structure of 14NA+ assemblies, interaction with CB7 and formation of supramolecular assemblies of CB7∋14NA+ were examined using light scattering, spectroscopic, and microscopic techniques. Entrapment of a luminescent dye, anthracene within the hydrophobic bilayer of the supramolecular assembly CB7∋14NA+ favors a modified luminescent response due to an efficient FRET process. Further, the FRET process could be controlled by thermal and chemical stimuli that induce transformation of unilamellar vesicles.
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Affiliation(s)
| | | | | | | | | | - Amitava Das
- CSIR-Central Salt and Marine Chemicals Research Institute , Bhavnagar 364002, India
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12
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Gupta S, Gupta MK. Possible role of nanocarriers in drug delivery against cervical cancer. NANO REVIEWS & EXPERIMENTS 2017; 8:1335567. [PMID: 30410707 PMCID: PMC6167030 DOI: 10.1080/20022727.2017.1335567] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 05/20/2017] [Indexed: 02/08/2023]
Abstract
Introduction: Cervical cancer is the second most common cancer and the largest cancer killer among women in most developing countries including India. Although, various drugs have been developed for cervical cancer, treatment with these drugs often results in a number of undesirable side effects, toxicity and multidrug resistance (MDR). Also, the outcomes for cervical cancer patients remain poor after surgery and chemo radiation. Methods: A literature search (for drugs and delivery systems against cervical cancer) was performed on PubMed and through Google. The present review discuss about various methods including its current conventional treatment with special reference to recent advances in delivery systems encapsulating various anticancer drugs and natural plant products for targeting towards cervical cancer. The role of photothermal therapy, gene therapy and radiation therapy against cervical cancer is also discussed. Results: Systemic/targeted drug delivery systems including liposomes, nanoparticles, hydrogels, dendrimers etc. and localized drug delivery systems like cervical patches, films, rings etc. are safer than the conventional chemotherapy which has further been proved by the several drug delivery systems undergoing clinical trials. Conclusion: Novel approaches for the aggressive treatment of cervical cancer will optimistically result in decreased side effects as well as toxicity, frequency of administration of existing drugs, to overcome MDR and to increase the survival rates.
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Affiliation(s)
- Swati Gupta
- B. S. Anangpuria Institute of Pharmacy, Pt B. D. Sharma University of Health Sciences, Faridabad, India
| | - Manish K. Gupta
- TERI-Deakin Nano Biotechnology Centre, The Energy and Resources Institute, Gurugram, India
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13
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Chang R, Yang J, Ge S, Zhao M, Liang C, Xiong L, Sun Q. Synthesis and self-assembly of octenyl succinic anhydride modified short glucan chains based amphiphilic biopolymer: Micelles, ultrasmall micelles, vesicles, and lutein encapsulation/release. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.12.023] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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14
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Radiolabeled block copolymer micelles for image-guided drug delivery. Int J Pharm 2016; 515:692-701. [DOI: 10.1016/j.ijpharm.2016.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 10/07/2016] [Accepted: 11/02/2016] [Indexed: 01/02/2023]
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15
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Manchun S, Dass CR, Sriamornsak P. Stability of freeze-dried pH-responsive dextrin nanogels containing doxorubicin. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2015.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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16
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Gonçalves C, Ferreira SA, Correia AL, Lopes C, Fleming CE, Rocha E, Vilanova M, Gama M. Potential of mannan or dextrin nanogels as vaccine carrier/adjuvant systems. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911516631354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Polymeric nanogels have been sophisticatedly designed promising a new generation of vaccine delivery/adjuvant systems capable of boosting immune response, a strategic priority in vaccine design. Here, nanogels made of mannan or dextrin were evaluated for their potential as carriers/adjuvants in vaccine formulations. Since lymph nodes are preferential target organs for vaccine delivery systems, nanogels were biotin-labeled, injected in the footpad of rats, and their presence in draining lymph nodes was assessed by immunofluorescence. Nanogels were detected in the popliteal and inguinal lymph nodes by 24 h upon subcutaneous administration, indicating entrapment in lymphatic organs. Moreover, the model antigen ovalbumin was physically encapsulated within nanogels and physicochemically characterized concerning size, zeta potential, ovalbumin loading, and entrapment efficiency. The immunogenicity of these formulations was assessed in mice intradermally immunized with ovalbumin–mannan or ovalbumin–dextrin by determining ovalbumin-specific antibody serum titers. Intradermal vaccination using ovalbumin–mannan elicited a humoral immune response in which ovalbumin-specific IgG1 levels were significantly higher than those obtained with ovalbumin alone, indicating a TH2-type response. In contrast, dextrin nanogel did not show adjuvant potential. Altogether, these results indicate that mannan nanogel is a material that should be explored as a future antigen delivery system.
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Affiliation(s)
| | - Sílvia A Ferreira
- Centro de Engenharia Biológica, Universidade do Minho, Braga, Portugal
| | - Alexandra L Correia
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Célia Lopes
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Porto, Portugal
| | - Carolina E Fleming
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Porto, Portugal
| | - Eduardo Rocha
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Porto, Portugal
| | - Manuel Vilanova
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Miguel Gama
- Centro de Engenharia Biológica, Universidade do Minho, Braga, Portugal
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Silva JP, Dhall S, Garcia M, Chan A, Costa C, Gama M, Martins-Green M. Improved burn wound healing by the antimicrobial peptide LLKKK18 released from conjugates with dextrin embedded in a carbopol gel. Acta Biomater 2015; 26:249-62. [PMID: 26234490 DOI: 10.1016/j.actbio.2015.07.043] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 06/12/2015] [Accepted: 07/29/2015] [Indexed: 12/28/2022]
Abstract
Antimicrobial peptides (AMPs) are good candidates to treat burn wounds, a major cause of morbidity, impaired life quality and resources consumption in developed countries. We took advantage of a commercially available hydrogel, Carbopol®, a vehicle for topical administration that maintains a moist environment within the wound site. We hypothesized that the incorporation of LLKKK18 conjugated to dextrin would improve the healing process in rat burns. Whereas the hydrogel improves healing, LLKKK18 released from the dextrin conjugates further accelerated wound closure, and simultaneously improving the quality of healing. Indeed, the release of LLKKK18 reduced oxidative stress and inflammation (low neutrophil and macrophage infiltration and pro-inflammatory cytokines levels). Importantly, it induced a faster resolution of the inflammatory stage through early M2 macrophage recruitment. In addition, LLKKK18 stimulated angiogenesis (increased VEGF and microvessel development in vivo). Moreover, collagen staining evaluated by Masson's Trichrome was visually much more intense after treatment with LLKKK18, suggesting higher collagen deposition. Overall, we generated an effective, safe and inexpensive formulation that maintains a moist environment in the wound, easy to apply and remove, and with potential to prevent infection due to the presence of an antimicrobial peptide. These findings propel us to further study this LLKKK18-containing formulation, setting the foundations towards a potential therapeutic approach for burn wound treatment. STATEMENT OF SIGNIFICANCE This work presents a newly developed formulation that holds great potential as a therapeutic approach for burn treatment. It is based on the sustained delivery of an antimicrobial peptide - LLKKK18 - from conjugates with dextrin, after degradation of dextrin backbone upon exposure to wound α-amylases. Conjugates were further embedded in Carbopol®, a commercially available hydrogel, suitable for topical administration and that provides a moist environment to the wound. Overall, we obtained an efficient, safe and non-expensive formulation that improves burn wound healing, maintains a moist environment within the wound, is easy to apply-and-remove, and has potential to prevent infection due to the presence of an antimicrobial peptide. Importantly, this is the first time the wound healing ability of LLKKK18 is demonstrated and that its main mechanisms of action are identified.
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Affiliation(s)
- João P Silva
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States; CEB - Centre for Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal.
| | - Sandeep Dhall
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States; Bioengineering Interdepartmental Graduate Program, University of California at Riverside, Riverside, CA 92521, United States
| | - Monika Garcia
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States
| | - Alex Chan
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States
| | - César Costa
- CEB - Centre for Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Miguel Gama
- CEB - Centre for Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Manuela Martins-Green
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States; Bioengineering Interdepartmental Graduate Program, University of California at Riverside, Riverside, CA 92521, United States
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Li Y, Maciel D, Rodrigues J, Shi X, Tomás H. Biodegradable Polymer Nanogels for Drug/Nucleic Acid Delivery. Chem Rev 2015; 115:8564-608. [PMID: 26259712 DOI: 10.1021/cr500131f] [Citation(s) in RCA: 323] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yulin Li
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira , Campus da Penteada 9000-390, Funchal, Portugal
- The State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, Engineering Research Centre for Biomedical Materials of Ministry of Education, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Dina Maciel
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira , Campus da Penteada 9000-390, Funchal, Portugal
| | - João Rodrigues
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira , Campus da Penteada 9000-390, Funchal, Portugal
| | - Xiangyang Shi
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira , Campus da Penteada 9000-390, Funchal, Portugal
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, People's Republic of China
| | - Helena Tomás
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira , Campus da Penteada 9000-390, Funchal, Portugal
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Manchun S, Dass CR, Cheewatanakornkool K, Sriamornsak P. Enhanced anti-tumor effect of pH-responsive dextrin nanogels delivering doxorubicin on colorectal cancer. Carbohydr Polym 2015; 126:222-30. [PMID: 25933543 DOI: 10.1016/j.carbpol.2015.03.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 02/23/2015] [Accepted: 03/10/2015] [Indexed: 01/24/2023]
Abstract
Efficacy of doxorubicin (DOX) in colorectal cancer treatment is limited by undesirable side-effects, which are partially due to nonspecific delivery DOX to the tumor target site. This study aimed to develop pH-responsive dextrin nanogels (DNGs) as anticancer drug carriers with pH-controlled drug release. DNGs prepared with formaldehyde as a cross-linker (FDNGs) exhibited smaller size, compared to that using glyoxal (GDNGs). Both DNGs showed pH-dependent drug release properties; drug release was slow at neutral pH but increased significantly in acidic medium. The cytotoxicity of empty and DOX-loaded FDNGs was lower than free DOX and GDNGs, against two commonly used colorectal cancer cells. Intracellular uptake studies indicated that the DOX-loaded FDNGs could efficiently deliver DOX into the nuclei. In vivo, DOX-loaded FDNGs substantially enhanced anti-tumor efficacy, compared to free DOX, exhibiting much higher effects on inhibiting proliferation and inducing apoptosis, as confirmed by mice weight shifts, tumor weight, tumor volume and histological assessment. Therefore, FDNGs are promising as a potential drug delivery vehicle for colorectal cancer therapy.
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Affiliation(s)
- Somkamol Manchun
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | - Crispin R Dass
- School of Pharmacy, Faculty of Health Sciences, Curtin University, Perth 6845, Australia; Curtin Health Innovation Research Institute of Ageing and Chronic Disease, Bentley 6102, Australia
| | - Kamonrak Cheewatanakornkool
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | - Pornsak Sriamornsak
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.
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20
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Gonçalves C, Silva JP, Antunes IF, Ferreira MFM, Martins JA, Geraldes CFGC, Lalatonne Y, Motte L, de Vries EFJ, Gama FM. Dextrin-Based Nanomagnetogel: In Vivo Biodistribution and Stability. Bioconjug Chem 2015; 26:699-706. [DOI: 10.1021/acs.bioconjchem.5b00024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | | | - I. F. Antunes
- Department
of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | | | | | - C. F. G. C. Geraldes
- Chemistry
Department, Faculty of Science and Technology, and Coimbra Chemistry
Center, University of Coimbra, 3001-401 Coimbra, Portugal
| | - Y. Lalatonne
- CSPBAT
Laboratory, UMR 7244 CNRS, Université Paris 13, Sorbonne Paris Cité, 93017 Bobigny, France
| | - L. Motte
- CSPBAT
Laboratory, UMR 7244 CNRS, Université Paris 13, Sorbonne Paris Cité, 93017 Bobigny, France
| | - E. F. J. de Vries
- Department
of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
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21
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Das D, Pal S. Modified biopolymer-dextrin based crosslinked hydrogels: application in controlled drug delivery. RSC Adv 2015. [DOI: 10.1039/c4ra16103c] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This review describes hydrogels and their classifications along with the synthesis and properties of biopolymer-dextrin based crosslinked hydrogels towards potential application in controlled drug delivery.
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Affiliation(s)
- Dipankar Das
- Polymer Chemistry Laboratory
- Department of Applied Chemistry
- Indian School of Mines
- Dhanbad-826004
- India
| | - Sagar Pal
- Polymer Chemistry Laboratory
- Department of Applied Chemistry
- Indian School of Mines
- Dhanbad-826004
- India
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Chen F, Liu J, Ye F, Zhao G. Synthesis and characterization of fatty acid oat β-glucan ester and its structure-curcumin loading capacity relationship. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:12256-12264. [PMID: 25429377 DOI: 10.1021/jf504596u] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An amphiphilic fatty acid oat β-glucan ester (FAOGE) was first synthesized, and its structure-curcumin loading capacity (CLC) relationship was investigated. The DS of product increased with the addition of acyl imidazole, decreased with Mw of β-glucan, and did not relate to the acyl chain length. Characterizations by FT-IR and (1)H NMR evidenced the presence of ester groups in FAOGE and confirmed its successful synthesis. The aqueous self-aggregation behavior of FAOGE was revealed by transmission electron microcopy and dynamic light scattering. With the aid of response surface methodology, a quadratic polynomial equation was obtained to quantitatively describe the structure-CLC relationship of FAOGE by using Mw of β-glucan, acyl chain length, and DS as variables. The CLC increased with Mw of β-glucan and acyl chain length but maximized at a medium DS. The maximum CLC value was obtained as 4.05 μg/mg. Hence, FAOGE is a potential candidate in solubilizing and delivering hydrophobic food ingredients.
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Affiliation(s)
- Fang Chen
- College of Food Science, Southwest University , Chongqing 400715, People's Republic of China
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Lei D, Liu J, Ye F, Chen F, Zhao G. Synthesis, characterization and aqueous self-assembly of octenylsuccinic corn dextrin ester with high molecular weight. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2014.04.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Silva DM, Nunes C, Pereira I, Moreira AS, Domingues MRM, Coimbra MA, Gama FM. Structural analysis of dextrins and characterization of dextrin-based biomedical hydrogels. Carbohydr Polym 2014; 114:458-466. [DOI: 10.1016/j.carbpol.2014.08.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 06/24/2014] [Accepted: 08/02/2014] [Indexed: 11/25/2022]
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Ji X, Shi C, Qi L, Guo Y, Li N, Li Z, Luan Y. Preparation, properties and in vivo pharmacokinetic study of drug vesicles composed of diphenhydramine and AOT. RSC Adv 2014. [DOI: 10.1039/c4ra09294e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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Catenacci L, Mandracchia D, Sorrenti M, Colombo L, Serra M, Tripodo G. In-Solution Structural Considerations by1H NMR and Solid-State Thermal Properties of Inulin-d-α-Tocopherol Succinate (INVITE) Micelles as Drug Delivery Systems for Hydrophobic Drugs. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400342] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Laura Catenacci
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Delia Mandracchia
- Department of Pharmacy; University of Bari “Aldo Moro”; Via Orabona 4 70125 Bari Italy
| | - Milena Sorrenti
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Lino Colombo
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Massimo Serra
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Giuseppe Tripodo
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
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Novel pH-responsive dextrin nanogels for doxorubicin delivery to cancer cells with reduced cytotoxicity to cardiomyocytes and stem cells. Carbohydr Polym 2014; 114:78-86. [PMID: 25263867 DOI: 10.1016/j.carbpol.2014.08.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 06/27/2014] [Accepted: 08/03/2014] [Indexed: 01/24/2023]
Abstract
The aim of this study was to develop pH-responsive dextrin nanogels (DNGs) capable of triggered intracellular DOX release at the lower pH of cancer cells. DNGs were prepared by an emulsion cross-linking method using glyoxal as cross-linker to create an acid-labile bond. A higher molecular weight of dextrin with increasing mole ratio of dextrin to glyoxal decreased the average diameter of DNGs. DNGs showed slightly negative surface charge and pH-responsive behavior. The in vitro drug release was slow at pH 7.4 and increased with decreasing pH (pH 5>6.8). The cytotoxicity of DOX-loaded DNGs in mesenchymal stem cells and cardiomyocytes was lower than that of free DOX. Moreover, DOX-loaded DNGs were efficiently internalized by tumor cells with rapid release of DOX into the nucleus. Thus, DOX-loaded DNGs were successful for intracellular targeted anti-tumor drug delivery and reducing side-effects to non-tumor cells such as cardiomyocytes and stem cells.
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Liu J, Li J, Ma Y, Chen F, Zhao G. Synthesis, characterization, and aqueous self-assembly of octenylsuccinate Oat β-glucan. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:12683-12691. [PMID: 24313441 DOI: 10.1021/jf4035354] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Amphiphilic oat β-glucan derivatives carrying octenylsuccinic groups as hydrophobic moieties have been synthesized. Materials with a different degree of substitution (DS) and weight-average molecular weight (Mw) for oat β-glucan were prepared and characterized using elemental analysis, infrared (IR) spectroscopy, and high performance size exclusion chromatography (HPSEC). Dynamic light scattering (DLS), fluorescence spectroscopy, and transmission electron microscopy (TEM) revealed that octenylsuccinate oat β-glucan (OSG) can self-assemble into spherical micelles in water with an average size ranging from 175 to 600 nm. OSG micelles were negatively charged as indicated by ζ-potential measurement. The critical micelle concentration (CMC) of OSGs varied from 0.206 to 0.039 mg/mL, depending on the DS and Mw of the oat β-glucan. It was found that the presence of OSG micelles in aqueous solution could significantly enhance the solubility of curcumin by 880 fold. Thus, OSG might have great potential in applications as hydrophobic nutrient delivery carriers.
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Affiliation(s)
- Jia Liu
- College of Food Science, Southwest University , Chongqing 400715, P.R. China
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Abstract
Drug-delivery carriers have the potential to not only treat but also diagnose many diseases; however, they still lack the complexity of natural-particulate systems. Cell-based therapies using tumor-targeting T cells and tumor-homing mesenchymal stem cells have given researchers a means to exploit the characteristics exhibited by innate-biological entities. Similarly, immune evasion by pathogens has inspired the development of natural polymers to cloak drug carriers. The 'marker-of-self' CD47 protein, which is found ubiquitously on mammalian cell surfaces, has been used for evading phagocyte clearance of drug carriers. This review will focus on the recent progress of drug carriers co-opting the tricks that cells in nature use to hide safely under the radar of the body's innate immune system.
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Gonçalves C, Lalatonne Y, Melro L, Badino G, Ferreira MFM, David L, Geraldes CFGC, Motte L, Martins JA, Gama FM. New dextrin nanomagnetogels as contrast agents for magnetic resonance imaging. J Mater Chem B 2013; 1:5853-5864. [DOI: 10.1039/c3tb21063d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Topel Ö, Çakır BA, Budama L, Hoda N. Determination of critical micelle concentration of polybutadiene-block-poly(ethyleneoxide) diblock copolymer by fluorescence spectroscopy and dynamic light scattering. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.10.013] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Dash U, Meher J, Misra PK. Organization of amphiphiles, part XII: studies on the interaction of glycine with aqueous micelles of polyoxyethylated nonyl phenols. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sridhar U, Pramod PS, Jayakannan M. Creation of dextrin vesicles and their loading-delivering capabilities. RSC Adv 2013. [DOI: 10.1039/c3ra43652g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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Dantas-Santos N, Almeida-Lima J, Vidal AAJ, Gomes DL, Oliveira RM, Santos Pedrosa S, Pereira P, Gama FM, Oliveira Rocha HA. Antiproliferative activity of fucan nanogel. Mar Drugs 2012; 10:2002-2022. [PMID: 23118717 PMCID: PMC3475269 DOI: 10.3390/md10092002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2012] [Revised: 09/08/2012] [Accepted: 09/11/2012] [Indexed: 12/19/2022] Open
Abstract
Sulfated fucans comprise families of polydisperse natural polysaccharides based on sulfated L-fucose. Our aim was to investigate whether fucan nanogel induces cell-specific responses. To that end, a non toxic fucan extracted from Spatoglossum schröederi was chemically modified by grafting hexadecylamine to the polymer hydrophilic backbone. The resulting modified material (SNFuc) formed nanosized particles. The degree of substitution with hydrophobic chains was close to 100%, as estimated by elemental analysis. SNFfuc in aqueous media had a mean diameter of 123 nm and zeta potential of -38.3 ± 0.74 mV, as measured by dynamic light scattering. Nanoparticles conserved their size for up to 70 days. SNFuc cytotoxicity was determined using the MTT assay after culturing different cell lines for 24 h. Tumor-cell (HepG2, 786, H-S5) proliferation was inhibited by 2.0%-43.7% at nanogel concentrations of 0.05-0.5 mg/mL and rabbit aorta endothelial cells (RAEC) non-tumor cell line proliferation displayed inhibition of 8.0%-22.0%. On the other hand, nanogel improved Chinese hamster ovary (CHO) and monocyte macrophage cell (RAW) non-tumor cell line proliferation in the same concentration range. The antiproliferative effect against tumor cells was also confirmed using the BrdU test. Flow cytometric analysis revealed that the fucan nanogel inhibited 786 cell proliferation through caspase and caspase-independent mechanisms. In addition, SNFuc blocks 786 cell passages in the S and G2-M phases of the cell cycle.
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Affiliation(s)
- Nednaldo Dantas-Santos
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Departament of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil; (N.D.-S.); (J.A.-L.); (A.A.J.V.); (D.L.G.); (R.M.O.)
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil
| | - Jailma Almeida-Lima
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Departament of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil; (N.D.-S.); (J.A.-L.); (A.A.J.V.); (D.L.G.); (R.M.O.)
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil
| | - Arthur Anthunes Jacome Vidal
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Departament of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil; (N.D.-S.); (J.A.-L.); (A.A.J.V.); (D.L.G.); (R.M.O.)
| | - Dayanne Lopes Gomes
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Departament of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil; (N.D.-S.); (J.A.-L.); (A.A.J.V.); (D.L.G.); (R.M.O.)
| | - Ruth Medeiros Oliveira
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Departament of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil; (N.D.-S.); (J.A.-L.); (A.A.J.V.); (D.L.G.); (R.M.O.)
| | - Silvia Santos Pedrosa
- IBB—Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Braga 4704-553, Portugal; (S.S.P.); (P.P.); (F.M.G.)
| | - Paula Pereira
- IBB—Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Braga 4704-553, Portugal; (S.S.P.); (P.P.); (F.M.G.)
| | - Francisco Miguel Gama
- IBB—Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Braga 4704-553, Portugal; (S.S.P.); (P.P.); (F.M.G.)
| | - Hugo Alexandre Oliveira Rocha
- Laboratory of Biotechnology of Natural Polymers (BIOPOL), Departament of Biochemistry, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil; (N.D.-S.); (J.A.-L.); (A.A.J.V.); (D.L.G.); (R.M.O.)
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal-RN 59078-970, Brazil
- Author to whom correspondence should be addressed; ; Tel.: +55-84-3215-3416 (ext. 207); Fax: +55-84-3211-9208
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Molinos M, Carvalho V, Silva DM, Gama FM. Development of a Hybrid Dextrin Hydrogel Encapsulating Dextrin Nanogel As Protein Delivery System. Biomacromolecules 2012; 13:517-27. [DOI: 10.1021/bm2015834] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Maria Molinos
- IBB, Institute for Biotechnology and Bioengineering,
Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Vera Carvalho
- IBB, Institute for Biotechnology and Bioengineering,
Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Dina M. Silva
- IBB, Institute for Biotechnology and Bioengineering,
Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Francisco M. Gama
- IBB, Institute for Biotechnology and Bioengineering,
Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
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Ferreira SA, Pereira P, Sampaio P, Coutinho PJG, Gama FM. Supramolecular assembled nanogel made of mannan. J Colloid Interface Sci 2011; 361:97-108. [PMID: 21658701 DOI: 10.1016/j.jcis.2011.05.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 05/03/2011] [Accepted: 05/05/2011] [Indexed: 10/18/2022]
Abstract
The supramolecular assembly of amphiphilic mannan, synthesized by the Michael addition of hydrophobic 1-hexadecanethiol to vinyl methacrylated mannan, originates in aqueous medium the formation of a nanogel, stabilized by hydrophobic interactions among alkyl chains. The critical aggregation concentration, calculated by fluorescence spectroscopy ranged between 0.002 and 0.01 mg/mL, depending on the polymer degree of substitution. The cryo-field emission scanning electron microscopy showed spherical macromolecular micelles with diameters between 100 and 500 nm. The dynamic light scattering analysis revealed a polydisperse colloidal system, with mean hydrodynamic diameter between 50 and 140 nm, depending on the polymer degree of substitution. The nanogel is negatively charged, stable over a 6 months storage period, and stable at pH 3-8, salt or urea solutions. Bovine serum albumin and curcumin were spontaneously incorporated in the nanogel, being stabilized by the hydrophobic domains, opening the possibility for future applications as potential delivery systems for therapeutic molecules. In vitro assays were carried out to characterize the biocompatibility of the nanogel. A toxic effect of mannan-C(16) was observed, specific to mouse macrophage-like cell line J774, not affecting mouse embryo fibroblast cell line 3T3 viability.
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Affiliation(s)
- Sílvia A Ferreira
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, University of Minho, Braga, Portugal.
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Zhang L, Fu J, Xia Z, Wu P, Zhang X. Synthesis and characterization of a well-defined amphiphilic block copolymer and its paclitaxel prodrug from methoxy poly(ethylene glycol) and oligomer of glycolic acid. J Appl Polym Sci 2011. [DOI: 10.1002/app.33871] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ferreira SA, Coutinho PJG, Gama FM. Synthesis and Characterization of Self-Assembled Nanogels Made of Pullulan. MATERIALS 2011; 4:601-620. [PMID: 28879943 PMCID: PMC5448516 DOI: 10.3390/ma4040601] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 03/17/2011] [Indexed: 11/22/2022]
Abstract
Self-assembled nanogels made of hydrophobized pullulan were obtained using a versatile, simple, reproducible and low-cost method. In a first reaction pullulan was modified with hydroxyethyl methacrylate or vinyl methacrylate, further modified in the second step with hydrophobic 1-hexadecanethiol, resulting as an amphiphilic material, which self-assembles in water via the hydrophobic interaction among alkyl chains. Structural features, size, shape, surface charge and stability of the nanogels were studied using hydrogen nuclear magnetic resonance, fluorescence spectroscopy, cryo-field emission scanning electron microscopy and dynamic light scattering. Above the critical aggregation concentration spherical polydisperse macromolecular micelles revealed long-term colloidal stability in aqueous medium, with a nearly neutral negative surface charge and mean hydrodynamic diameter in the range 100–400 nm, depending on the polymer degree of substitution. Good size stability was observed when nanogels were exposed to potential destabilizing pH conditions. While the size stability of the nanogel made of pullulan with vinyl methacrylate and more hydrophobic chains grafted was affected by the ionic strength and urea, nanogel made of pullulan with hydroxyethyl methacrylate and fewer hydrophobic chains grafted remained stable.
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Affiliation(s)
- Sílvia A Ferreira
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Campus Gualtar 4710-057, Braga, Portugal.
| | - Paulo J G Coutinho
- Centre of Physics, Minho University, Campus Gualtar 4710-057, Braga, Portugal.
| | - Francisco M Gama
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Campus Gualtar 4710-057, Braga, Portugal.
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Carvalho V, Castanheira P, Madureira P, Ferreira SA, Costa C, Teixeira JP, Faro C, Vilanova M, Gama M. Self-assembled dextrin nanogel as protein carrier: controlled release and biological activity of IL-10. Biotechnol Bioeng 2011; 108:1977-86. [PMID: 21391205 DOI: 10.1002/bit.23125] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 02/23/2011] [Accepted: 02/28/2011] [Indexed: 01/22/2023]
Abstract
Interleukin-10 (IL-10) is an anti-inflammatory cytokine, which active form is a non-covalent homodimer. Given the potential of IL-10 for application in various medical conditions, it is essential to develop systems for its effective delivery. In previous work, it has been shown that a dextrin nanogel effectively incorporated and stabilized rIL-10, enabling its release over time. In this work, the delivery system based on dextrin nanogels was further analyzed. The biocompatibility of the nanogel was comprehensively analyzed, through cytotoxicity (lactate dehydrogenase (LDH) release, MTS, Live, and Dead) and genotoxicity (comet) assays. The release profile of rIL-10 and its biological activity were evaluated in vivo, using C57BL/6 mice. Although able to maintain a stable concentration of IL-10 for at least 4 h in mice serum, the amount of protein released was rather low. Despite this, the amount of rIL-10 released from the complex was biologically active inhibiting TNF-α production, in vivo, by LPS-challenged mice. In spite of the significant stabilization achieved using the nanogel, rIL-10 still denatures rather quickly. An additional effort is thus necessary to develop an effective delivery system for this cytokine, able to release active protein over longer periods of time. Nevertheless, the good biocompatibility, the protein stabilization effect and the ability to perform as a carrier with controlled release suggest that self-assembled dextrin nanogels may be useful protein delivery systems.
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Affiliation(s)
- Vera Carvalho
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Li Q, Liu CG, Huang ZH, Xue FF. Preparation and characterization of nanoparticles based on hydrophobic alginate derivative as carriers for sustained release of vitamin D3. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:1962-7. [PMID: 21288023 DOI: 10.1021/jf1020347] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Hydrophobic alginate derivative was prepared by modification of alginate by acid chloride reaction using oleoyl chloride without organic solvents. The conjugate of oleoyl alginate ester (OAE) was confirmed by FT-IR and (1)H NMR. The degree of substitution (DS) of OAE was determined by (1)H NMR, and it ranged from 0.84 to 3.85. In distilled water, OAE formed self-assembled nanoparticles at low concentrations in aqueous medium, and nanoparticles retained their structural integrity both in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF). The loading and release characteristics of nanoparticles based on OAE were investigated using vitamin D(3) as a model nutraceutical. As the concentration of vitamin D(3) increased, the loading capacity (LC) increased, whereas the loading efficiency (LE) decreased. Nanoparticles could release vitamin D(3) at a sustained rate in gastrointestinal fluid. These results revealed the potential of OAE nanoparticles as oral carriers for sustained release of vitamin D(3).
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Affiliation(s)
- Qian Li
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, People's Republic of China
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Carvalho V, Castanheira P, Faria TQ, Gonçalves C, Madureira P, Faro C, Domingues L, Brito RM, Vilanova M, Gama M. Biological activity of heterologous murine interleukin-10 and preliminary studies on the use of a dextrin nanogel as a delivery system. Int J Pharm 2010; 400:234-42. [DOI: 10.1016/j.ijpharm.2010.08.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 08/16/2010] [Accepted: 08/25/2010] [Indexed: 12/19/2022]
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Gonçalves C, Ferreira MFM, Santos AC, Prata MIM, Geraldes CFGC, Martins JA, Gama FM. Studies on the biodistribution of dextrin nanoparticles. NANOTECHNOLOGY 2010; 21:295103. [PMID: 20601764 DOI: 10.1088/0957-4484/21/29/295103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The characterization of biodistribution is a central requirement in the development of biomedical applications based on the use of nanoparticles, in particular for controlled drug delivery. The blood circulation time, organ biodistribution and rate of excretion must be well characterized in the process of product development. In this work, the biodistribution of recently developed self-assembled dextrin nanoparticles is addressed. Functionalization of the dextrin nanoparticles with a DOTA-monoamide-type metal chelator, via click chemistry, is described. The metal chelator functionalized nanoparticles were labelled with a gamma-emitting (153)Sm(3+) radioisotope and the blood clearance rate and organ biodistribution of the nanoparticles were obtained. The effect of PEG surface coating on the blood clearance rate and organ biodistribution of the nanoparticles was also studied.
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Affiliation(s)
- C Gonçalves
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Campus de Gualtar, 4710-057 Braga, Portugal
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Ferreira SA, Coutinho PJG, Gama FM. Self-assembled nanogel made of mannan: synthesis and characterization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11413-11420. [PMID: 20518563 DOI: 10.1021/la100903j] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Amphiphilic mannan (mannan-C(16)) was synthesized by the Michael addition of hydrophobic 1-hexadecanethiol (C(16)) to hydroxyethyl methacrylated mannan (mannan-HEMA). Mannan-C(16) formed nanosized aggregates in water by self-assembly via the hydrophobic interaction among C(16) molecules as confirmed by hydrogen nuclear magnetic resonance ((1)H NMR), fluorescence spectroscopy, cryo-field emission scanning electron microscopy (cryo-FESEM), and dynamic light scattering (DLS). The mannan-C(16) critical aggregation concentration (cac), calculated by fluorescence spectroscopy with Nile red and pyrene, ranged between 0.04 and 0.02 mg/mL depending on the polymer degree of substitution of C(16) relative to methacrylated groups. Cryo-FESEM micrographs revealed that mannan-C(16) formed irregular spherical macromolecular micelles, in this work designated as nanogels, with diameters ranging between 100 and 500 nm. The influence of the polymer degree of substitution, DS(HEMA) and DS(C(16)), on the nanogel size and zeta potential was studied by DLS at different pH values and ionic strength and as a function of mannan-C(16) and urea concentrations. Under all tested conditions, the nanogel was negatively charged with a zeta potential close to zero. Mannan-C(16) with higher DS(HEMA) and DS(C(16)) values formed larger nanogels and were also less stable over a 6 month storage period and at concentrations close to the cac. When exposed to solutions of different pH and aggressive conditions of ionic strength and urea concentration, the size of mannan-C(16) varied to some extent but was always in the nanoscale range.
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Affiliation(s)
- Sílvia A Ferreira
- Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal
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Abstract
Hydrogel nanoparticles—also referred to as polymeric nanogels or macromolecular micelles—are emerging as promising drug carriers for therapeutic applications. These nanostructures hold versatility and properties suitable for the delivery of bioactive molecules, namely of biopharmaceuticals. This article reviews the latest developments in the use of self-assembled polymeric nanogels for drug delivery applications, including small molecular weight drugs, proteins, peptides, oligosaccharides, vaccines and nucleic acids. The materials and techniques used in the development of self-assembling nanogels are also described.
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Gonçalves C, Torrado E, Martins T, Pereira P, Pedrosa J, Gama M. Dextrin nanoparticles: Studies on the interaction with murine macrophages and blood clearance. Colloids Surf B Biointerfaces 2010; 75:483-9. [DOI: 10.1016/j.colsurfb.2009.09.024] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 09/15/2009] [Accepted: 09/19/2009] [Indexed: 11/24/2022]
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Determination of dextrin based on its self-aggregation by resonance light scattering technique. Anal Chim Acta 2009; 635:202-6. [DOI: 10.1016/j.aca.2009.01.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 10/16/2008] [Accepted: 01/05/2009] [Indexed: 11/20/2022]
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48
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Garcia H, Barros AS, Gonçalves C, Gama FM, Gil AM. Characterization of dextrin hydrogels by FTIR spectroscopy and solid state NMR spectroscopy. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.05.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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