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Ayach J, Duma L, Badran A, Hijazi A, Martinez A, Bechelany M, Baydoun E, Hamad H. Enhancing Wastewater Depollution: Sustainable Biosorption Using Chemically Modified Chitosan Derivatives for Efficient Removal of Heavy Metals and Dyes. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2724. [PMID: 38893988 PMCID: PMC11173971 DOI: 10.3390/ma17112724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 05/10/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024]
Abstract
Driven by concerns over polluted industrial wastewater, particularly heavy metals and dyes, this study explores biosorption using chemically cross-link chitosan derivatives as a sustainable and cost-effective depollution method. Chitosan cross-linking employs either water-soluble polymers and agents like glutaraldehyde or copolymerization of hydrophilic monomers with a cross-linker. Chemical cross-linking of polymers has emerged as a promising approach to enhance the wet-strength properties of materials. The chitosan thus extracted, as powder or gel, was used to adsorb heavy metals (lead (Pb2+) and copper (Cu2+)) and dyes (methylene blue (MB) and crystal violet (CV)). Extensive analysis of the physicochemical properties of both the powder and hydrogel adsorbents was conducted using a range of analytical techniques, including Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and scanning electron microscopy (SEM), as well as 1H and 13C nuclear magnetic resonance (NMR). To gain a comprehensive understanding of the sorption process, the effect of contact time, pH, concentration, and temperature was investigated. The adsorption capacity of chitosan powder for Cu(II), Pb(II), methylene blue (MB), and crystal violet (CV) was subsequently determined as follows: 99, 75, 98, and 80%, respectively. In addition, the adsorption capacity of chitosan hydrogel for Cu(II), Pb(II), MB, and CV was as follows: 85, 95, 85, and 98%, respectively. The experimental data obtained were analyzed using the Langmuir, Freundlich, and Dubinin-Radushkevich isotherm models. The isotherm study revealed that the adsorption equilibrium is well fitted to the Freundlich isotherm (R2 = 0.998), and the sorption capacity of both chitosan powder and hydrogel was found to be exceptionally high (approximately 98%) with the adsorbent favoring multilayer adsorption. Besides, Dubinin has given an indication that the sorption process was dominated by Van der Waals physical forces at all studied temperatures.
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Affiliation(s)
- Jana Ayach
- Research Platform for Environmental Science (PRASE), Doctoral School of Science and Technology, Lebanese University, Beirut P.O. Box 657314, Lebanon; (J.A.); (A.H.); (H.H.)
- CNRS, ICMR UMR 7312, University of Reims Champagne-Ardenne, 51687 Reims, France;
| | - Luminita Duma
- CNRS, ICMR UMR 7312, University of Reims Champagne-Ardenne, 51687 Reims, France;
| | - Adnan Badran
- Department of Nutrition, University of Petra, Amman P.O Box 961343, Jordan;
| | - Akram Hijazi
- Research Platform for Environmental Science (PRASE), Doctoral School of Science and Technology, Lebanese University, Beirut P.O. Box 657314, Lebanon; (J.A.); (A.H.); (H.H.)
| | - Agathe Martinez
- CNRS, ICMR UMR 7312, University of Reims Champagne-Ardenne, 51687 Reims, France;
| | - Mikhael Bechelany
- Institut Européen des Membranes (IEM), UMR-5635, University of Montpellier, Centre National de la Recherche Scientifique (CNRS), École Nationale Supérieure de Chimie de Montpellier (ENSCM), Place Eugène Bataillon, 34095 Montpellier, France
- Functional Materials Group, Gulf University for Science and Technology (GUST), Mubarak Al-Abdullah 32093, Kuwait
| | - Elias Baydoun
- Department of Biology, American University of Beirut, Beirut P.O. Box 110236, Lebanon;
| | - Hussein Hamad
- Research Platform for Environmental Science (PRASE), Doctoral School of Science and Technology, Lebanese University, Beirut P.O. Box 657314, Lebanon; (J.A.); (A.H.); (H.H.)
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Barros MVA, Teixeira KC, da Silva Santos L, Rocha BL, Prados CP, Dos Santos Pereira AK, da Silva Maia AM. Ultraviolet spectrophotometry as method to determine the concentration of β-myrcene released from chitosan in aqueous medium. J Pharmacol Toxicol Methods 2024; 127:107509. [PMID: 38701958 DOI: 10.1016/j.vascn.2024.107509] [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: 11/16/2023] [Revised: 03/30/2024] [Accepted: 04/30/2024] [Indexed: 05/06/2024]
Abstract
Myrcene (β-myrcene), found in essential oils from plant species such as hops and cannabis, has many advantageous properties, but its use is limited due to volatility and low solubility in water. One way to circumvent these limitations is to encapsulate the essential oils in a polymer matrix. However, these hydrophobic molecules are difficult to quantify when dispersed in water. Seeking to study the release of this terpene in drug release tests from polymeric matrices, this work aimed to develop an easy and cheap UV spectrophotometric method for the quantification of β-myrcene in aqueous medium. To achieves this goal, samples were prepared in 0.05% (w/v) polysorbate 80 solution, with concentrations of β-myrcene ranging from 0.01% to 0.1% (v/v), and were analyzed at 226 nm. Each sample was analyzed in triplicate and repeated on three different days, to evaluate the repeatability of the results. The results were subjected to Q, F and Student's t-tests. The regression parameters obtained for β-myrcene were above 0.99 and through statistical analysis, it was possible to confirm the repeatability for the results. The values of the limits of detection and quantification indicated that the method is not affected by intrinsic factors of the equipment. The results of accuracy, robustness and selectivity showed recovery rates within acceptable limits. This demonstrates that the quantification of β-myrcene in aqueous medium by UV spectrophotometry is feasible.
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Affiliation(s)
| | - Keila Cardoso Teixeira
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil
| | - Laene da Silva Santos
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil
| | - Bruna Lima Rocha
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil
| | - Carolina Porto Prados
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil.
| | | | - Ana Maria da Silva Maia
- Collegiate of Exact and Biotechnology Sciences, Federal University of Tocantins-UFT, Gurupi, TO 77402-970, Brazil.
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Mahmud AH, Salahuddin NM, Md Jani AM, Abu Bakar NF, Zainal Abidin SAS, Mohd Zain Z, Low KF. A voltammetric immunosensor based on a nanoporous alumina millirod for detection of porcine serum albumin. Food Chem 2023; 411:135493. [PMID: 36689871 DOI: 10.1016/j.foodchem.2023.135493] [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: 11/12/2022] [Revised: 01/02/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023]
Abstract
A voltammetric immunosensor was developed for detection of porcine serum albumin (PSA) to identify raw meat products adulterated with pork. A novel strategy to fabricate multiple individual nanoporous alumina (NPA) millirods (length, 5.0 mm; diameter, 1.0 mm) as the biorecognition platform is described. Each NPA millirod was covalently bioconjugated with anti-PSA capturing antibodies (α-PSAC). Following immunocapture, the PSA bound to the α-PSAC/NPA millirod bioconjugate were tagged with gold nanoparticles (AuNPs) functionalized with anti-PSA detection antibodies as the signaling probe. Subsequently, the AuNPs were voltammetrically analyzed to quantify the target PSA. The immunosensor exhibited 100 % specificity and high sensitivity to PSA with a limit of detection (LoD) of 50 (range, 0-1000) pg/mL (R2 = 0.9907). Real-world applicability was successfully validated using pork/beef adulterated mixtures with a LoD of 0.05 % (w/w). Overall, the detection performance of the proposed immunosensor was excellent and, thus, is suitable for surveillance of food safety and quality.
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Affiliation(s)
- Abdul Hadi Mahmud
- Faculty of Applied Sciences, Universiti Teknologi MARA, Tapah Campus, Tapah Road, Perak 35400 Malaysia
| | - Nurul Mahira Salahuddin
- Faculty of Applied Sciences, Universiti Teknologi MARA, Tapah Campus, Tapah Road, Perak 35400 Malaysia
| | - Abdul Mutalib Md Jani
- Faculty of Applied Sciences, Universiti Teknologi MARA, Tapah Campus, Tapah Road, Perak 35400 Malaysia
| | - Noor Fitrah Abu Bakar
- School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam, Selangor 40450 Malaysia
| | - Siti Aimi Sarah Zainal Abidin
- Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor 40450 Malaysia; Malaysia Institute of Transport, Universiti Teknologi MARA, Shah Alam, Selangor 40450 Malaysia
| | - Zainiharyati Mohd Zain
- Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor 40450 Malaysia; Electrochemical Material and Sensors (EmaS) Group, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor 40450 Malaysia
| | - Kim-Fatt Low
- Faculty of Applied Sciences, Universiti Teknologi MARA, Tapah Campus, Tapah Road, Perak 35400 Malaysia; Electrochemical Material and Sensors (EmaS) Group, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor 40450 Malaysia.
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Mackay SE, Malherbe F, Eldridge DS. Quaternary amine functionalized chitosan for enhanced adsorption of low concentration phosphate to remediate environmental eutrophication. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sringam J, Pankongadisak P, Trongsatitkul T, Suppakarn N. Improving Mechanical Properties of Starch-Based Hydrogels Using Double Network Strategy. Polymers (Basel) 2022; 14:polym14173552. [PMID: 36080626 PMCID: PMC9460441 DOI: 10.3390/polym14173552] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
This work aims to improve the mechanical properties of starch-based hydrogels using a double-network (DN) strategy. The single network (SN) starch hydrogel was first prepared using glutaraldehyde as a crosslinker. The compressive properties of the SN hydrogels were influenced by both crosslinker content and crosslinking time. The SN starch hydrogel possessing the best mechanical properties was then fabricated into DN hydrogels. Polyvinyl alcohol (PVA) and borax were used as a secondary polymer and a crosslinker, respectively. The PVA–borax complexation partly enhanced the DN hydrogel’s compressive modulus by 30% and its toughness by 39%. DN hydrogels were found to have denser microstructures than SN hydrogels. To be specific, their walls thickened and grew more continuous while their pores shrank. The increased crosslinking density resulted in changes to the microstructure, which were well correlated with their porosity and water uptake capacity. An in vitro cytotoxicity test of the DN hydrogels revealed that they were non-toxic to chondrocytes. This work demonstrated that double networking is a simple but effective strategy for improving mechanical properties of starch-based hydrogels without sacrificing their biocompatibility. This approach can be used to tailor hydrogel properties to fulfill requirements for biomedical applications, such as tissue engineering and other related fields.
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Affiliation(s)
- Jiradet Sringam
- School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Research Center for Biocomposite Materials for Medical Industry and Agricultural and Food Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Porntipa Pankongadisak
- School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Research Center for Biocomposite Materials for Medical Industry and Agricultural and Food Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Tatiya Trongsatitkul
- School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Research Center for Biocomposite Materials for Medical Industry and Agricultural and Food Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Center of Excellence in Biomechanics Medicine, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Correspondence: (T.T.); (N.S.)
| | - Nitinat Suppakarn
- School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Research Center for Biocomposite Materials for Medical Industry and Agricultural and Food Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Center of Excellence in Microbial Technology for Agricultural Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Correspondence: (T.T.); (N.S.)
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Application of mathematical modelling to alginate chitosan polyelectrolyte complexes for the prediction of system behavior with Venlafaxine HCl as a model charged drug. Saudi Pharm J 2022; 30:1507-1520. [DOI: 10.1016/j.jsps.2022.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 07/23/2022] [Indexed: 11/18/2022] Open
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7
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Kumar M, Elahi D, Bhardwaj A, Sharma S, Khushi K, Singh E, Singh N, Srivastava A. Physiochemical Investigation of the Excipients Mixed Micelles for improvement of Encapsulation and Controlled Release of Antihistamine Drugs. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119971] [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]
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Woźniak A, Biernat M. Methods for crosslinking and stabilization of chitosan structures for potential medical applications. J BIOACT COMPAT POL 2022. [DOI: 10.1177/08839115221085738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Chitosan is a well-known polymer widely used in tissue engineering and regenerative medicine. It is biocompatible, biodegradable, non-toxic, has antibacterial and osteoconductive properties. Chitosan is often used in the form of composites (with the participation of ceramic particles), membranes, hydrogels or nanoparticles. The problem with biomaterials is their low durability, rapid degradation, poor mechanical properties and cytotoxicity. Cross-linking or stabilization of such materials allows for solving these problems. It is important that the compounds used for this purpose exhibit limited or no toxicity. The presented article is a review and presents some methods of cross-linking/stabilization of chitosan structures. The analysis concerns low or non-cytotoxic cross-linking/stabilization methods. The discussed compounds used for the purpose of chitosan structure fixation are: cinnamaldehyde, genipin, L-aspartic acid, vanillin, sodium carbonate, sodium alginate, BGP, ethanol and TPP. There is discussed also a hydrothermal/dehydrothermal method which seems to be promising as it is more advantageous since no additional compounds are introduced into the structure.
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Affiliation(s)
- Anna Woźniak
- Biomaterials Research Group, Lukasiewicz Research Network—Institute of Ceramics and Building Materials, Ceramics and Concrete Division in Warsaw, Warsaw, Poland
| | - Monika Biernat
- Biomaterials Research Group, Lukasiewicz Research Network—Institute of Ceramics and Building Materials, Ceramics and Concrete Division in Warsaw, Warsaw, Poland
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9
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Surface modification of film chitosan materials with aldehydes for wettability and biodegradation control. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-04039-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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El-Dakroury WA, Zewail MB, Elsabahy M, Shabana ME, Asaad GF. Famotidine-loaded solid self-nanoemulsifying drug delivery system demonstrates exceptional efficiency in amelioration of peptic ulcer. Int J Pharm 2022; 611:121303. [PMID: 34798155 DOI: 10.1016/j.ijpharm.2021.121303] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/02/2021] [Accepted: 11/12/2021] [Indexed: 12/12/2022]
Abstract
Famotidine (FMD) is a highly potent H2-receptor antagonist used in peptic ulcer treatment. However, the drug possesses poor aqueous solubility and permeability. FMD-loaded solid self-nanoemulsifying drug delivery system (FMD-S-SNEDDS) comprised of Labrafil® M 1944 CS, Tween® 20 and PEG 400, adsorbed on Aerosil® 200, has been developed. FMD-S-SNEDDS has demonstrated acceptable micromeritic properties, and upon reconstitution in water, spherical nanosized particles were released, as demonstrated by dynamic light scattering studies and transmission electron microscopy imaging. High encapsulation efficiency of FMD in the developed SNEDDS has been attained, and the saturated solubility of the drug has increased by 20-fold when it was incorporated in the SNEDDS. Several in vitro characterizations have been carried out, including, Fourier transform-infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, and drug dissolution studies. In vivo, upon administration of the free drug suspension, marketed product (FAMOTIN®) and FMD-S-SNEDDS (40 mg/kg) in peptic ulcer rat models, FMD-S-SNEDDS and the marketed FMD demonstrated 12.5- and 4.7-fold reduction in ulcers number, and 28.7- and 7.2-fold reduction in ulcer severity, respectively, compared to the control untreated animals. FMD-S-SNEDDS showed a significant (p < 0.05) increase in the levels of depleted glutathione and endothelial nitric oxide synthase, and significantly (p < 0.05) reduced the elevated level of malondialdehyde, as compared to the free and marketed FMD. Only FMD-S-SNEDDS could restore the elevated proton pump activity and cyclic adenosine monophosphate RNA expression to their normal levels. Hence, FMD-S-SNEDDS provides a great potential as a nanotherapeutic system for treatment of peptic ulcer.
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Affiliation(s)
- Walaa A El-Dakroury
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Moataz B Zewail
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Mahmoud Elsabahy
- School of Biotechnology, Badr University in Cairo, Badr City, Cairo 11829, Egypt; Department of Chemistry, Texas A&M University, College Station, TX 77842, USA.
| | - Marwa E Shabana
- Department of Pathology, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Gihan F Asaad
- Department of Pharmacology, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo 12622, Egypt
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Dully M, Ceresnakova M, Murray D, Soulimane T, Hudson SP. Lipid Cubic Systems for Sustained and Controlled Delivery of Antihistamine Drugs. Mol Pharm 2021; 18:3777-3794. [PMID: 34547899 PMCID: PMC8493555 DOI: 10.1021/acs.molpharmaceut.1c00279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 12/03/2022]
Abstract
Antihistamines are capable of blocking mediator responses in allergic reactions including allergic rhinitis and dermatological reactions. By incorporating various H1 receptor antagonists into a lipid cubic phase network, these active ingredients can be delivered locally over an extended period of time owing to the mucoadhesive nature of the system. Local delivery can avoid inducing unwanted side effects, often observed after systematic delivery. Lipid-based antihistamine delivery systems are shown here to exhibit prolonged release capabilities. In vitro drug dissolution studies investigated the extent and release rate of two model first-generation and two model second-generation H1 antagonist antihistamine drugs from two monoacyglycerol-derived lipid models. To optimize the formulation approach, the systems were characterized macroscopically and microscopically by small-angle X-ray scattering and polarized light to ascertain the mesophase accessed upon an incorporation of antihistamines of varying solubilities and size. The impact of encapsulating the antihistamine molecules on the degree of mucoadhesivity of the lipid cubic systems was investigated using multiparametric surface plasmon resonance. With the ultimate goal of developing therapies for the treatment of allergic reactions, the ability of the formulations to inhibit mediator release utilizing RBL-2H3 mast cells with the propensity to release histamine upon induction was explored, demonstrating no interference from the lipid excipient on the effectiveness of the antihistamine molecules.
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Affiliation(s)
- Michele Dully
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
| | - Miriama Ceresnakova
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
| | - David Murray
- COOK
Ireland Limited, O’Halloran
Rd, Castletroy, Co. Limerick V94 N8X2, Ireland
| | - Tewfik Soulimane
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
| | - Sarah P. Hudson
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
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12
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Polymethylmethacrylate Copolymer-Based Microcarriers for Culturing Mammalian Cells. J Pharm Innov 2021. [DOI: 10.1007/s12247-020-09532-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Aradmehr A, Javanbakht V. A novel biofilm based on lignocellulosic compounds and chitosan modified with silver nanoparticles with multifunctional properties: Synthesis and characterization. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124952] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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14
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Amino hydroxyapatite/chitosan hybrids reticulated with glutaraldehyde at different pH values and their use for diclofenac removal. Carbohydr Polym 2020; 236:116036. [DOI: 10.1016/j.carbpol.2020.116036] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 12/10/2019] [Accepted: 02/18/2020] [Indexed: 01/08/2023]
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Prolonged mosquitocidal activity of Siparuna guianensis essential oil encapsulated in chitosan nanoparticles. PLoS Negl Trop Dis 2019; 13:e0007624. [PMID: 31398198 PMCID: PMC6703692 DOI: 10.1371/journal.pntd.0007624] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 08/21/2019] [Accepted: 07/10/2019] [Indexed: 01/03/2023] Open
Abstract
Background The use of synthetic insecticides is one of the most common strategies for controlling disease vectors such as mosquitos. However, their overuse can result in serious risks to human health, to the environment, as well as to the selection of insecticidal resistant insect strains. The development of efficient and eco-friendly insect control is urgent, and essential oils have been presented as potential alternatives to synthetic insecticides. Moreover, nanoencapsulation techniques can enhance their efficiency by protecting from degradation and providing a controlled release rate. Results We assessed the potential of chitosan nanoparticles in encapsulating Siparuna guianensis essential oil, and maintaining its efficiency and prolonging its activity for the control of Aedes aegypti larvae. The encapsulation was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA), with an encapsulation efficiency ranging from 84.8% to 88.0%. Toxicity studies have demonstrated efficacy against mosquito larvae over 50% for 19 days with 100% mortality during the first week. This persistent action is presumably due to the enhanced contact and slow and maintained release conferred by chitosan nanoparticles. Furthermore, the exposure of aquatic non-target organisms (e.g. embryos and small adult fishes) revealed adequate selectivity of these nanoparticles. Conclusions The encapsulation of S. guianensis essential oil in chitosan nanoparticles showed promising potential as a larvicide control alternative and should be considered within strategies for fighting Ae. aegypti. Numerous outbreaks of infectious diseases such as dengue, zika, and chikungunya in tropical countries have occurred where the mosquito Aedes aegypti is the transmitting vector. In Brazil, these infections are responsible for deaths and severe sequelae. Thus, many efforts have been made by governmental and research groups to control these outbreaks. However, complete success in this control has so far remained unachieved. Parallel to the need to develop new technologies that contribute to the control of insects that transmit diseases, there is a growing societal awareness regarding the risks associated with the use of synthetic insecticides, which has led to a search for natural alternatives such as essential oils from plants. Thus, our group conducted experiments to evaluate the application of nanotechnology in obtaining an efficient prolonged release system to combat Ae. aegypti larvae using the essential oil of a plant native to the Cerrado and Amazonian forests. These results demonstrate that using a simple and easily scalable encapsulation technique; it is possible to keep the low toxicity against non-target organism and prolong the activity of an essential oil in water and maintain larval mortality at a significant level for more than a week with a single application.
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Chemical cross-linking: A feasible approach to prolong doxylamine/pyridoxine release from spray-dried chitosan microspheres. Eur J Pharm Sci 2018; 123:387-394. [DOI: 10.1016/j.ejps.2018.07.059] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/25/2018] [Accepted: 07/31/2018] [Indexed: 01/23/2023]
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17
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Famotidine microspheres reconstituted with floating in situ gel for stomach-specific delivery: Preparation and characterization. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.07.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Alam MN, Christopher LP. A novel, cost-effective and eco-friendly method for preparation of textile fibers from cellulosic pulps. Carbohydr Polym 2017; 173:253-258. [DOI: 10.1016/j.carbpol.2017.06.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Revised: 05/06/2017] [Accepted: 06/01/2017] [Indexed: 11/26/2022]
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Mokhtar M, Gosselin P, Lacasse F, Hildgen P. Design of PEG-grafted-PLA nanoparticles as oral permeability enhancer for P-gp substrate drug model Famotidine. J Microencapsul 2017; 34:91-103. [PMID: 28151040 DOI: 10.1080/02652048.2017.1290155] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Bioavailability of oral drugs can be limited by an intestinal excretion process mediated by P-glycoprotein (P-gp). Polyethylene glycol (PEG) is a known P-gp inhibitor. Dispersion of Famotidine (a P-gp substrate) within PEGylated nanoparticles (NPs) was used to improve its oral bioavailability. In this work, we evaluated the potential impact of NPs prepared from a grafted copolymer of polylactic acid and PEG on P-gp function by studying in vitro permeability of Famotidine across Caco-2 cells. Copolymers of PEG grafted on polylactic acid (PLA) backbone (PLA-g-PEG) were synthesised with 1 mol% and 5 mol% PEG vs. lactic acid monomer using PEG 750 and 2000 Da. The polymers were used to prepare Famotidine-loaded NPs and tested in vitro on Caco-2 cells. Significant decrease in basolateral-to-apical transport of Famotidine was observed when Famotidine was encapsulated in NPs prepared from PLA-g-PEG5%. NPs prepared from PLA-g-PEG5% are promising to improve oral bioavailability of P-gp substrates.
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Affiliation(s)
- Mohamed Mokhtar
- a Faculty of Pharmacy , University of Montreal , Montreal , Quebec , Canada
| | - Patrick Gosselin
- b Corealis Pharma , Pharmaceutical R&D , Laval , Quebec , Canada
| | - François Lacasse
- a Faculty of Pharmacy , University of Montreal , Montreal , Quebec , Canada
| | - Patrice Hildgen
- c Faculty of Pharmacy , University of Montreal, Lab of Nanotech Pharmacy , Montreal , Quebec , Canada
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Khan G, Yadav SK, Patel RR, Nath G, Bansal M, Mishra B. Development and Evaluation of Biodegradable Chitosan Films of Metronidazole and Levofloxacin for the Management of Periodontitis. AAPS PharmSciTech 2016; 17:1312-1325. [PMID: 26689408 DOI: 10.1208/s12249-015-0466-y] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 12/03/2015] [Indexed: 11/30/2022] Open
Abstract
Metronidazole (MZ) and levofloxacin (LF) are widely employed for treatment of periodontitis, but high oral dose and resistance development after long-term oral administration limit their use. The aim of this study was to alleviate shortcomings in the treatment of periodontitis by fabrication of intrapocket, biodegradable films of chitosan (CS) loaded with MZ and LF meant for inserting into periodontal pockets to treat infections. The films were developed by solvent casting technique using propylene glycol as plasticizer and glutaraldehyde as crosslinking agent. Their physical characteristics, such as drug content, surface pH, swelling index, and folding endurance, exhibited results within limit. Further, FTIR and DSC studies revealed stability of films and compatibility between drugs and excipients. SEM images of films showed the presence of free drug particles on the surface causing burst effect. In vitro release in McIlvaine buffer pH 6.6 was of sustained nature assisted by the burst effect. CS and crosslinking agent concentrations negatively affected drug release and positively affected T90 (time for releasing 90% of the drug) due to altered matrix density. In contrast, the plasticizer concentration increases membrane permeability and hence increased drug release, lowering T90. Crosslinked films demonstrated sustained release up to 7 days. The antibacterial efficacy of films was tested on Staphylococcus aureus and Escherichia coli, indicating good antibacterial activity. Clinical trials on patients proved the therapeutic efficacy of the films by a significant (p < 0.05) decrease in the clinical markers of periodontitis, i.e. gingival index, plaque index and pocket depth. Conclusively, the films of MZ and LF were successful tools for the management of periodontitis.
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Li J, Wang Q, Zhi W, Wang J, Feng B, Qu S, Mu Y, Weng J. Immobilization of salvianolic acid B-loaded chitosan microspheres distributed three-dimensionally and homogeneously on the porous surface of hydroxyapatite scaffolds. ACTA ACUST UNITED AC 2016; 11:055014. [PMID: 27716647 DOI: 10.1088/1748-6041/11/5/055014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Porous hydroxyapatite (HA) scaffolds combined with a drug delivery system have attracted much attention for bone tissue engineering. In this study, an easy and highly efficient method was developed to immobilize salvianolic acid B (Sal B)-loaded chitosan (CS) microspheres three dimensionally and homogeneously on the surface of HA scaffolds pre-coated with alginate. Porous HA scaffolds were prepared via a template-leaching process and CS microspheres (used as drug carriers) were fabricated by an emulsion method. To improve adhesion between the microspheres and HA scaffolds, alginate was used to pre-coat the porous surface of the HA scaffolds. Various concentrations of alginate were used to optimize the adhesion of Sal B-loaded CS microspheres to the scaffold surface. During the adherence process, coated HA scaffolds were immersed in an aqueous solution containing Sal B-loaded CS microspheres, followed by standing or shaking at 37 °C for a certain time. The results showed that the microspheres were solidly and homogeneously distributed on the porous surface of the alginate pre-coated HA scaffolds via electrostatic interactions. Few microspheres detached from the porous surface, even after the HA scaffolds with microspheres were treated by shaking in distilled water for as long as 7 d. Compared with the static condition, the distribution of Sal B-loaded CS microspheres on the porous surface of pre-coated HA scaffolds in the shaken condition was more homogeneous and almost unaggregated. Additionally, the compressive strength of the scaffolds coated with alginate was obviously improved. The optimal alginate coating concentration was 1% (i.e. the microstructure of the porous surfaces of the HA scaffolds was almost unchanged). The release profile of Sal B over a 30 d immersion found an initial burst release followed by a sustained release. The result of cell culture in vitro was that 1% alginate-coated scaffolds with Sal B-loaded CS microspheres obviously promoted cell proliferation after cell culture for 3 and 7 d, and cells were attached and uniformly distributed on the porous surface of the scaffolds. The strategy of incorporating drug-loaded microspheres with porous HA scaffolds could provide an excellent bone substitute for repair of bone tissue defects.
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Affiliation(s)
- Jinyu Li
- Key Laboratory of Advanced Technologies of Materials (MOE), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
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Ignjatović NL, Penov-Gaši KM, Wu VM, Ajduković JJ, Kojić VV, Vasiljević-Radović D, Kuzmanović M, Uskoković V, Uskoković DP. Selective anticancer activity of hydroxyapatite/chitosan-poly(d,l)-lactide-co-glycolide particles loaded with an androstane-based cancer inhibitor. Colloids Surf B Biointerfaces 2016; 148:629-639. [PMID: 27694053 DOI: 10.1016/j.colsurfb.2016.09.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 09/15/2016] [Accepted: 09/27/2016] [Indexed: 12/12/2022]
Abstract
In an earlier study we demonstrated that hydroxyapatite nanoparticles coated with chitosan-poly(d,l)-lactide-co-glycolide (HAp/Ch-PLGA) target lungs following their intravenous injection into mice. In this study we utilize an emulsification process and freeze drying to load the composite HAp/Ch-PLGA particles with 17β-hydroxy-17α-picolyl-androst-5-en-3β-yl-acetate (A), a chemotherapeutic derivative of androstane and a novel compound with a selective anticancer activity against lung cancer cells. 1H NMR and 13C NMR techniques confirmed the intact structure of the derivative A following its entrapment within HAp/Ch-PLGA particles. The thermogravimetric and differential thermal analyses coupled with mass spectrometry were used to assess the thermal degradation products and properties of A-loaded HAp/Ch-PLGA. The loading efficiency, as indicated by the comparison of enthalpies of phase transitions in pure A and A-loaded HAp/Ch-PLGA, equaled 7.47wt.%. The release of A from HAp/Ch-PLGA was sustained, neither exhibiting a burst release nor plateauing after three weeks. Atomic force microscopy and particle size distribution analyses were used to confirm that the particles were spherical with a uniform size distribution of d50=168nm. In vitro cytotoxicity testing of A-loaded HAp/Ch-PLGA using MTT and trypan blue dye exclusion assays demonstrated that the particles were cytotoxic to the A549 human lung carcinoma cell line (46±2%), while simultaneously preserving high viability (83±3%) of regular MRC5 human lung fibroblasts and causing no harm to primary mouse lung fibroblasts. In conclusion, composite A-loaded HAp/Ch-PLGA particles could be seen as promising drug delivery platforms for selective cancer therapies, targeting malignant cells for destruction, while having a significantly lesser cytotoxic effect on the healthy cells.
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Affiliation(s)
- Nenad L Ignjatović
- Institute of Technical Sciences of the Serbian Academy of Science and Arts, Knez Mihailova 35/IV, P.O. Box 377, 11000 Belgrade, Serbia
| | - Katarina M Penov-Gaši
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Victoria M Wu
- Advanced Materials and Nanobiotechnology Laboratory, Department of Biomedical and Pharmaceutical Sciences, School of Pharmacy, Chapman University, 9401 Jeronimo Road, Irvine, CA 92618-1908, USA
| | - Jovana J Ajduković
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Vesna V Kojić
- University of Novi Sad, Faculty of Medicine, Oncology Institute of Vojvodina, Dr Goldmana 4, 21204 Sremska Kamenica, Serbia
| | - Dana Vasiljević-Radović
- University of Belgrade, Institute for Chemistry, Technology and Metallurgy, Njegoševa 12, Belgrade, Serbia
| | - Maja Kuzmanović
- Institute of Technical Sciences of the Serbian Academy of Science and Arts, Knez Mihailova 35/IV, P.O. Box 377, 11000 Belgrade, Serbia
| | - Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Department of Biomedical and Pharmaceutical Sciences, School of Pharmacy, Chapman University, 9401 Jeronimo Road, Irvine, CA 92618-1908, USA; Department of Bioengineering, University of Illinois, 851 South Morgan Street, Chicago, IL 60607-7052, USA.
| | - Dragan P Uskoković
- Institute of Technical Sciences of the Serbian Academy of Science and Arts, Knez Mihailova 35/IV, P.O. Box 377, 11000 Belgrade, Serbia.
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Monteiro AADS, Richter AR, Maciel JDS, Feitosa JPA, Paula HCB, Monteiro de Paula RC. Efeito da modificação química na solubilidade e intumescimento de microesferas à base de goma do cajueiro carboximetilada e quitosana. POLIMEROS 2015. [DOI: 10.1590/0104-1428.1779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Resumo Esferas de goma do cajueiro carboximetilada e quitosana foram produzidas via complexação polieletrolítica. As esferas foram modificadas quimicamente de modo a obter-se sistemas estáveis em meio ácido e que apresentassem uma resposta de intumescimento diferenciado frente à variação de pH. As esferas foram modificadas por reacetilação da quitosana e por reticulação com epicloridrina, glutaraldeído e genipina. As esferas reticuladas foram caracterizadas por meio de técnicas como: espectroscopia de absorção no infravermelho, análise termogravimétrica, microscopia eletrônica de varredura e quanto à solubilidade em pH 1,2 e ao intumescimento. As esferas de goma do cajueiro carboximetilada e quitosana reacetilada, e as esferas reticuladas com epicloridrina apresentaram baixa resistência à dissolução em pH 1,2. Entretanto, as esferas reticuladas com glutaraldeído e genipina apresentaram resistência à dissolução e baixo coeficiente de difusão. As esferas reticuladas com genipina apresentaram um grau de intumescimento maior do que as esferas reticuladas com glutaraldeído nas concentrações de 3% e 5% (massa/volume). As esferas reticuladas com genipina apresentaram intumescimento responsivo à variação de pH e estabilidade em pH 1,2, indicando que esses sistemas possuem potencial para uso em sistemas de liberação controlada de fármacos por via oral.
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Gaspar MC, Sousa JJS, Pais AACC, Cardoso O, Murtinho D, Serra MES, Tewes F, Olivier JC. Optimization of levofloxacin-loaded crosslinked chitosan microspheres for inhaled aerosol therapy. Eur J Pharm Biopharm 2015; 96:65-75. [PMID: 26192459 DOI: 10.1016/j.ejpb.2015.07.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 07/09/2015] [Accepted: 07/11/2015] [Indexed: 01/08/2023]
Abstract
The aim of this work was the development of innovative levofloxacin-loaded swellable microspheres (MS) for the dry aerosol therapy of pulmonary chronicPseudomonas aeruginosainfections in Cystic Fibrosis patients. In a first step, a factorial design was applied to optimize formulations of chitosan-based MS with glutaraldehyde as crosslinker. After optimization, other crosslinkers (genipin, glutaric acid and glyceraldehyde) were tested. Analyses of MS included aerodynamic and swelling properties, morphology, drug loading, thermal and chemical characteristics,in vitroantibacterial activity and drug release studies. The prepared MS presented a drug content ranging from 39.8% to 50.8% of levofloxacin in an amorphous or dispersed state, antibacterial activity and fast release profiles. The highest degree of swelling was obtained for MS crosslinked with glutaric acid and genipin. These formulations also presented satisfactory aerodynamic properties, making them a promising alternative, in dry-powder inhalers, to levofloxacin solution for inhalation.
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Affiliation(s)
- Marisa C Gaspar
- Center for Neuroscience and Cell Biology, University of Coimbra, 3000-548 Coimbra, Portugal; Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
| | - João J S Sousa
- Center for Neuroscience and Cell Biology, University of Coimbra, 3000-548 Coimbra, Portugal; Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | | | - Olga Cardoso
- Laboratory of Microbiology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Dina Murtinho
- Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal
| | - M Elisa S Serra
- Chemistry Department, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Frédéric Tewes
- INSERM, U 1070, Pôle Biologie Santé, 1 rue Georges Bonnet, TSA 51106, 86073 Poitiers Cedex 9, France; University of Poitiers, Faculty of Medicine and Pharmacy, 6 rue de la Milétrie, TSA 51115, 86073 Poitiers Cedex 9, France
| | - Jean-Christophe Olivier
- INSERM, U 1070, Pôle Biologie Santé, 1 rue Georges Bonnet, TSA 51106, 86073 Poitiers Cedex 9, France; University of Poitiers, Faculty of Medicine and Pharmacy, 6 rue de la Milétrie, TSA 51115, 86073 Poitiers Cedex 9, France
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Novel Starch-PVA Polymer for Microparticle Preparation and Optimization Using Factorial Design Study. INTERNATIONAL SCHOLARLY RESEARCH NOTICES 2015; 2015:261476. [PMID: 27347511 PMCID: PMC4897262 DOI: 10.1155/2015/261476] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/21/2014] [Accepted: 10/27/2014] [Indexed: 12/18/2022]
Abstract
The aim of our present work was to optimize the ratio of a very novel polymer, starch-polyvinyl alcohol (PVA), for controlled delivery of Ornidazole. Polymer-coated drug microparticles were prepared by emulsion method. Microscopic study, scanning electron microscopic study, and atomic force microscopic study revealed that the microparticles were within 10 micrometers of size with smooth spherical shape. The Fourier transform infrared spectroscopy showed absence of drug polymer interaction. A statistical 3(2) full factorial design was used to study the effect of different concentration of starch and PVA on the drug release profile. The three-dimensional plots gave us an idea about the contribution of each factor on the release kinetics. Hence this novel polymer of starch and polyvinyl alcohol can be utilized for control release of the drug from a targeted delivery device.
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Li B, Shan CL, Zhou Q, Fang Y, Wang YL, Xu F, Han LR, Ibrahim M, Guo LB, Xie GL, Sun GC. Synthesis, characterization, and antibacterial activity of cross-linked chitosan-glutaraldehyde. Mar Drugs 2013; 11:1534-52. [PMID: 23670533 PMCID: PMC3707160 DOI: 10.3390/md11051534] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 04/17/2013] [Accepted: 04/26/2013] [Indexed: 01/31/2023] Open
Abstract
This present study deals with synthesis, characterization and antibacterial activity of cross-linked chitosan-glutaraldehyde. Results from this study indicated that cross-linked chitosan-glutaraldehyde markedly inhibited the growth of antibiotic-resistant Burkholderia cepacia complex regardless of bacterial species and incubation time while bacterial growth was unaffected by solid chitosan. Furthermore, high temperature treated cross-linked chitosan-glutaraldehyde showed strong antibacterial activity against the selected strain 0901 although the inhibitory effects varied with different temperatures. In addition, physical-chemical and structural characterization revealed that the cross-linking of chitosan with glutaraldehyde resulted in a rougher surface morphology, a characteristic Fourier transform infrared (FTIR) band at 1559 cm−1, a specific X-ray diffraction peak centered at 2θ = 15°, a lower contents of carbon, hydrogen and nitrogen, and a higher stability of glucose units compared to chitosan based on scanning electron microscopic observation, FTIR spectra, X-ray diffraction pattern, as well as elemental and thermo gravimetric analysis. Overall, this study indicated that cross-linked chitosan-glutaraldehyde is promising to be developed as a new antibacterial drug.
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Affiliation(s)
- Bin Li
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (B.L.); (C.-L.S.); (Q.Z.); (M.I.); (G.-L.X.)
- State Key Laboratory Breeding Base for Zhejiang Sustainable Plant Pest and Disease Control, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mail:
| | - Chang-Lin Shan
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (B.L.); (C.-L.S.); (Q.Z.); (M.I.); (G.-L.X.)
| | - Qing Zhou
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (B.L.); (C.-L.S.); (Q.Z.); (M.I.); (G.-L.X.)
| | - Yuan Fang
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China; E-Mail:
| | - Yang-Li Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Plant Pest and Disease Control, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mail:
| | - Fei Xu
- Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mail:
| | - Li-Rong Han
- Research and Development Center of Biorational Pesticides, Northwest A & F University, Yangling, Shaanxi 712100, China
- Authors to whom correspondence should be addressed; E-Mails: (L.-R.H.); (L.-B.G.); (G.-C.S.); Tel.: +86-29-87092122 (L.-R.H.); +86-571-63370537 (L.-B.G.); +86-571-86404273 (G.-C.S.)
| | - Muhammad Ibrahim
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (B.L.); (C.-L.S.); (Q.Z.); (M.I.); (G.-L.X.)
| | - Long-Biao Guo
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
- Authors to whom correspondence should be addressed; E-Mails: (L.-R.H.); (L.-B.G.); (G.-C.S.); Tel.: +86-29-87092122 (L.-R.H.); +86-571-63370537 (L.-B.G.); +86-571-86404273 (G.-C.S.)
| | - Guan-Lin Xie
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (B.L.); (C.-L.S.); (Q.Z.); (M.I.); (G.-L.X.)
| | - Guo-Chang Sun
- State Key Laboratory Breeding Base for Zhejiang Sustainable Plant Pest and Disease Control, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (L.-R.H.); (L.-B.G.); (G.-C.S.); Tel.: +86-29-87092122 (L.-R.H.); +86-571-63370537 (L.-B.G.); +86-571-86404273 (G.-C.S.)
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Venkata Srikanth M, Sreenivasa Rao N, Ambedkar Sunil S, Janaki Ram B, Kolapalli VRM. Statistical design and evaluation of a propranolol HCl gastric floating tablet. Acta Pharm Sin B 2012. [DOI: 10.1016/j.apsb.2011.12.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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