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Kathuria D, Dhiman AK. Encapsulation of soy isoflavone extract by freeze drying, its stability during storage and development of isoflavone enriched yoghurt. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2022; 59:4945-4955. [PMID: 36276528 PMCID: PMC9579231 DOI: 10.1007/s13197-022-05583-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 08/05/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
Soybean is a natural source of isoflavone. Its extract has a bitter and astringent taste and undergoes through oxidative deterioration. The study aimed at encapsulation of isoflavone extract using different carrier material through freeze drying. Maltodextrin, β-cyclodextrin, and tapioca starch were employed in 1:3 while sodium alginate and carboxymethyl cellulose in 1:1.25 as extract to carrier material ratio for encapsulation. Carrier material reflected significant (< 0.05) effect on encapsulation efficiency, isoflavone content and morphology of encapsulated extract. Maltodextrin was selected as the best material for encapsulation of isoflavone extract reflecting significantly higher encapsulation efficiency along with homogenous coating on the particle surface as examined through SEM. The band stretching in FTIR analysis also indicates the retention of functional groups after encapsulation. The encapsulated extract packed in ambered glass vials can be stored safely for a period of 6 months with a higher withholding of isoflavones under refrigerated conditions. Furthermore, encapsulated isoflavone extract was incorporated in yoghurt @ 50 mg isoflavone which improved its functional and sensory properties. About 96.83% of isoflavone was retention in yoghurt containing encapsulated extract compared to yoghurt having extract without encapsulation.
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Affiliation(s)
- Deepika Kathuria
- Dairy Chemistry Division, NDRI, Karnal, Haryana 132001 India
- Department of Food Science and Technology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP 173230 India
| | - Anju K. Dhiman
- Department of Food Science and Technology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP 173230 India
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Halahlah A, Piironen V, Mikkonen KS, Ho TM. Polysaccharides as wall materials in spray-dried microencapsulation of bioactive compounds: Physicochemical properties and characterization. Crit Rev Food Sci Nutr 2022; 63:6983-7015. [PMID: 35213281 DOI: 10.1080/10408398.2022.2038080] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Natural bioactive compounds (BCs) are types of chemicals found in plants and certain foods that promote good health, however they are sensitive to processing and environmental conditions. Microencapsulation by spray drying is a widely used and cost-effective approach to create a coating layer to surround and protect BCs and control their release, enabling the production of high functional products/ingredients with extended shelf life. In this process, wall materials determine protection efficiency, and physical properties, bioavailability, and storage stability of microencapsulated products. Therefore, an understanding of physicochemical properties of wall materials is essential for the successful and effective spray-dried microencapsulation process. Typically, polysaccharide-based wall materials are generated from more sustainable sources and have a wider range of physicochemical properties and applications compared to their protein-based counterparts. In this review, we highlight the essential physicochemical properties of polysaccharide-based wall materials for spray-dried microencapsulation of BCs including solubility, thermal stability, and emulsifying properties, rheological and film forming properties. We provide further insight into possibilities for the chemical structure modification of native wall materials and their controlled release behaviors. Finally, we summarize the most recent studies involving polysaccharide biopolymers as wall materials and/or emulsifiers in spray-dried microencapsulation of BCs.
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Affiliation(s)
| | - Vieno Piironen
- Department of Food and Nutrition, University of Helsinki, Finland
| | - Kirsi S Mikkonen
- Department of Food and Nutrition, University of Helsinki, Finland
- Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Finland
| | - Thao M Ho
- Department of Food and Nutrition, University of Helsinki, Finland
- Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Finland
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3
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Vrettos NN, Roberts CJ, Zhu Z. Gastroretentive Technologies in Tandem with Controlled-Release Strategies: A Potent Answer to Oral Drug Bioavailability and Patient Compliance Implications. Pharmaceutics 2021; 13:pharmaceutics13101591. [PMID: 34683884 PMCID: PMC8539558 DOI: 10.3390/pharmaceutics13101591] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 11/24/2022] Open
Abstract
There have been many efforts to improve oral drug bioavailability and therapeutic efficacy and patient compliance. A variety of controlled-release oral delivery systems have been developed to meet these needs. Gastroretentive drug delivery technologies have the potential to achieve retention of the dosage form in the upper gastrointestinal tract (GIT) that can be sufficient to ensure complete solubilisation of the drugs in the stomach fluids, followed by subsequent absorption in the stomach or proximal small intestine. This can be beneficial for drugs that have an “absorption window” or are absorbed to a different extent in various segments of the GIT. Therefore, gastroretentive technologies in tandem with controlled-release strategies could enhance both the therapeutic efficacy of many drugs and improve patient compliance through a reduction in dosing frequency. The paper reviews different gastroretentive drug delivery technologies and controlled-release strategies that can be combined and summarises examples of formulations currently in clinical development and commercially available gastroretentive controlled-release products. The different parameters that need to be considered and monitored during formulation development for these pharmaceutical applications are highlighted.
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Yun P, Devahastin S, Chiewchan N. Microstructures of encapsulates and their relations with encapsulation efficiency and controlled release of bioactive constituents: A review. Compr Rev Food Sci Food Saf 2021; 20:1768-1799. [PMID: 33527760 DOI: 10.1111/1541-4337.12701] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 11/24/2020] [Accepted: 12/15/2020] [Indexed: 12/26/2022]
Abstract
Vitamins, peptides, essential oils, and probiotics are examples of health beneficial constituents, which are nevertheless heat-sensitive and possess poor chemical stability. Various encapsulation methods have been applied to protect these constituents against thermal and chemical degradations. Encapsulates prepared by different methods and/or at different conditions exhibit different microstructures, which in turn differently influence the encapsulation efficiency as well as retention of encapsulated core materials. This review provides a summary of various microstructures resulted from the use of selected encapsulation methods or systems, namely, spray coating; co-extrusion; emulsion-, micelle-, and liposome-based; coacervation; and ionic gelation encapsulation, at different conditions. Subsequent effects of the different microstructures on encapsulation efficiency and retention of encapsulated core materials are mentioned and discussed. Encapsulates having compact microstructures resulted from the use of low-surface tension and low-viscosity encapsulants, high-stability encapsulation systems, lower loads of core materials to total solids of encapsulants and appropriate solidification conditions have proved to exhibit higher encapsulation efficiencies and better retention of encapsulated core materials. Encapsulates with hollow, dent, shrunken microstructures or thinner walls resulted from inappropriate solidification conditions and higher loads of core materials, on the other hand, possess lower encapsulation efficiencies and protection capabilities. Encapsulates having crack, blow-hole or porous microstructures resulted from the use of high-viscosity encapsulants and inappropriate solidification conditions exhibit the lowest encapsulation efficiencies and poorest protection capabilities. Compact microstructures and structures formed between ionic biopolymers could be used to regulate the release of encapsulated cores.
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Affiliation(s)
- Pheakdey Yun
- Advanced Food Processing Research Laboratory, Department of Food Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Tungkru, Bangkok, Thailand
| | - Sakamon Devahastin
- Advanced Food Processing Research Laboratory, Department of Food Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Tungkru, Bangkok, Thailand.,The Academy of Science, The Royal Society of Thailand, Dusit, Bangkok, Thailand
| | - Naphaporn Chiewchan
- Advanced Food Processing Research Laboratory, Department of Food Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Tungkru, Bangkok, Thailand
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Deng Y, Wang T, Li J, Sun W, He H, Gou J, Wang Y, Yin T, Zhang Y, Tang X. Studies on the in vitro ion exchange kinetics and thermodynamics and in vivo pharmacokinetics of the carbinoxamine-resin complex. Int J Pharm 2020; 588:119779. [PMID: 32805380 DOI: 10.1016/j.ijpharm.2020.119779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 07/18/2020] [Accepted: 08/13/2020] [Indexed: 11/28/2022]
Abstract
The short half-life and bitter taste of carbinoxamine maleate2 (CAM) lead to poor compliance by pediatric patients who are being treated for allergic rhinitis. To address these issues, carbinoxamine-resin complexes3 (CRCs) were prepared by ion exchange and then coated with Kollicoat SR 30D. The resultant microencapsulated carbinoxamine-resin complexes4 (MCRCs) were dispersed into the medium to obtain the final suspensions. The drug loading kinetics and thermodynamics of CRCs, anti-swelling mechanism of the impregnant in MCRCs, in vitro release, and in vivo pharmacokinetics of the suspensions were systematically evaluated. The drug loading process was found to obey a first-order kinetic process that was spontaneous, entropy-reduced and exothermic, and the diffusion of CAM into the resin was the rate-limiting step. During microencapsulation, the impregnant could create a certain buffer space to control the swelling of CRCs and maintain the coating film intact. The homemade preparations had release behaviors similar to that of the reference in vitro and achieved sustained release in vivo. The low drug loading preparation had a higher relative bioavailability of 109% owing to its faster release and better dispersibility. Therefore, the suspensions based on MCRCs could be successfully applied to treating allergic rhinitis in children.
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Affiliation(s)
- Yaxin Deng
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Tiantian Wang
- School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Jinlong Li
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Wanxiao Sun
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Haibing He
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Jingxin Gou
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Yanjiao Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China
| | - Tian Yin
- School of Functional Food and Wine, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China.
| | - Yu Zhang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China.
| | - Xing Tang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, Liaoning, PR China.
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Shahidi Noghabi M, Molaveisi M. The effect of wall formulation on storage stability and physicochemical properties of cinnamon essential oil microencapsulated by spray drying. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01171-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Faieta M, Corradini MG, Di Michele A, Ludescher RD, Pittia P. Effect of Encapsulation Process on Technological Functionality and Stability of Spirulina Platensis Extract. FOOD BIOPHYS 2019. [DOI: 10.1007/s11483-019-09602-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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The role of emulsion parameters in tramadol sustained-release from electrospun mats. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:1493-1501. [DOI: 10.1016/j.msec.2019.02.085] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 01/14/2019] [Accepted: 02/21/2019] [Indexed: 01/04/2023]
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9
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Nova MV, Nothnagel L, Thurn M, Travassos PB, Herculano LS, Bittencourt PR, Novello CR, Bazotte RB, Wacker MG, Bruschi ML. Development study of pectin/Surelease® solid microparticles for the delivery of L-alanyl-L-glutamine dipeptide. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.11.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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10
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Qu S, Dai C, Zhu J, Zhao L, Li Y, Hao Z. Cefquinome-loaded microsphere formulations against Klebsiella pneumonia infection during experimental infections. Drug Deliv 2018; 25:909-915. [PMID: 29649952 PMCID: PMC6058672 DOI: 10.1080/10717544.2018.1461958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 01/07/2023] Open
Abstract
The aim of this study was to prepare cefquinome-loaded polylactic acid microspheres and to evaluate their in vitro and in vivo characteristics and pharmacodynamics for the therapy of pneumonia in a rat model. Microspheres were prepared using a 0.7 mm two-fluid nozzle spray drier in one step resulting in spherical and smooth microspheres of uniform size (9.8 ± 3.6 μm). The encapsulation efficiency and drug loading of cefquinome were 91.6 ± 2.6% and 18.7 ± 1.2%, respectively. In vitro release of cefquinome from the microspheres was sustained for 36 h. Cefquinome-loaded polylactic acid microspheres as a drug delivery system was successful for clearing experimental Klebsiella pneumonia lung infections. A decrease in inflammatory cells and an inhibition of inflammatory cytokines TNF-α, IL-1β and IL-8 after microspheres treatment was found. Changes in cytokine levels and types are secondary manifestations of drug bactericidal effects. Rats were considered to be microbiologically cured because the bacterial load was less than 100 CFU/g. These results also indicated that the spray-drying method of loading therapeutic drug into polylactic acid microspheres is a straightforward and safe method for lung-targeting therapy in animals.
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Affiliation(s)
- Shaoqi Qu
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, China
- National-Local Joint Engineering Laboratory, Agricultural Bio-pharmaceutical Technology, Qingdao, China
| | - Cunchun Dai
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, China
- National-Local Joint Engineering Laboratory, Agricultural Bio-pharmaceutical Technology, Qingdao, China
| | - Jiajia Zhu
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, China
- National-Local Joint Engineering Laboratory, Agricultural Bio-pharmaceutical Technology, Qingdao, China
| | - Li Zhao
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, China
- National-Local Joint Engineering Laboratory, Agricultural Bio-pharmaceutical Technology, Qingdao, China
| | - Yuwen Li
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, China
- National-Local Joint Engineering Laboratory, Agricultural Bio-pharmaceutical Technology, Qingdao, China
| | - Zhihui Hao
- Agricultural Bio-pharmaceutical Laboratory, Qingdao Agricultural University, Qingdao, China
- National-Local Joint Engineering Laboratory, Agricultural Bio-pharmaceutical Technology, Qingdao, China
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Tan DCT, Ong JJ, Gokhale R, Heng PWS. Hot melt extrusion of ion-exchange resin for taste masking. Int J Pharm 2018; 547:385-394. [DOI: 10.1016/j.ijpharm.2018.05.068] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/15/2018] [Accepted: 05/29/2018] [Indexed: 11/25/2022]
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12
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Arca HC, Mosquera-Giraldo LI, Bi V, Xu D, Taylor LS, Edgar KJ. Pharmaceutical Applications of Cellulose Ethers and Cellulose Ether Esters. Biomacromolecules 2018; 19:2351-2376. [PMID: 29869877 DOI: 10.1021/acs.biomac.8b00517] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Cellulose ethers have proven to be highly useful natural-based polymers, finding application in areas including food, personal care products, oil field chemicals, construction, paper, adhesives, and textiles. They have particular value in pharmaceutical applications due to characteristics including high glass transition temperatures, high chemical and photochemical stability, solubility, limited crystallinity, hydrogen bonding capability, and low toxicity. With regard to toxicity, cellulose ethers have essentially no ability to permeate through gastrointestinal enterocytes and many are already in formulations approved by the U.S. Food and Drug Administration. We review pharmaceutical applications of these valuable polymers from a structure-property-function perspective, discussing each important commercial cellulose ether class; carboxymethyl cellulose, methyl cellulose, hydroxypropylcellulose, hydroxypropyl methyl cellulose, and ethyl cellulose, and cellulose ether esters including hydroxypropyl methyl cellulose acetate succinate and carboxymethyl cellulose acetate butyrate. We also summarize their syntheses, basic material properties, and key pharmaceutical applications.
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Affiliation(s)
| | - Laura I Mosquera-Giraldo
- Department of Industrial and Physical Pharmacy , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Vivian Bi
- Ashland Specialty Ingredients , 500 Hercules Road , Wilmington , Delaware 19808 , United States
| | - Daiqiang Xu
- Ashland Specialty Ingredients , 500 Hercules Road , Wilmington , Delaware 19808 , United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy , Purdue University , West Lafayette , Indiana 47907 , United States
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Biodegradable Films Based on Gelatin and Papaya Peel Microparticles with Antioxidant Properties. FOOD BIOPROCESS TECH 2017. [DOI: 10.1007/s11947-017-2030-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Afrasiabi Garekani H, Sanadgol N, Dehghan Nayyeri N, Nokhodchi A, Sadeghi F. Peculiar effect of polyethylene glycol in comparison with triethyl citrate or diethyl phthalate on properties of ethyl cellulose microcapsules containing propranolol hydrochloride in process of emulsion-solvent evaporation. Drug Dev Ind Pharm 2017; 44:421-431. [PMID: 29098888 DOI: 10.1080/03639045.2017.1395460] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Plasticizers play a crucial role in various process of microencapsulation. In this study, the effect of incorporation of plasticizer in process of emulsion solvent evaporation was investigated on properties of ethyl cellulose (EC) microcapsules containing propranolol hydrochloride. The effect of plasticizer type and concentration were investigated on characteristics of microcapsules prepared from different viscosity grades of EC. Product yield, encapsulation efficiency, mean particle size, shape, surface characteristics, solid state of drug, and drug release profiles were evaluated. Product yield and encapsulation efficiency were not dependent on plasticizer type and concentration. However, encapsulation efficiency decreased with increase in EC viscosity grade in the most of the cases. The mean particle size was in the range of 724-797 μm and was not dependent on plasticizer type. Microcapsules formed in the presence of PEG had a very smooth surface with few pores. XRD and DSC studies revealed a reduction of drug crystallinity after microencapsulation especially in presence of PEG. The results showed that the presence of TEC and DEP with different concentrations had no marked effect on drug release from microcapsules containing different viscosity grades of EC. This was not the case when PEG was used, and despite its water solubility it reduced the drug release rate noticeably. The reduction in the drug release in the presence of PEG was concentration-dependent. The use of PEG as a plasticizer in process of emulsion solvent evaporation highly improved the EC microcapsule structure and retarded the drug release rate and therefore is recommended.
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Affiliation(s)
- Hadi Afrasiabi Garekani
- a Pharmaceutical Research center , Mashhad University of Medical Sciences , Mashhad , Iran.,b Department of Pharmaceutics, School of pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Nasim Sanadgol
- b Department of Pharmaceutics, School of pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Nafiseh Dehghan Nayyeri
- b Department of Pharmaceutics, School of pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Ali Nokhodchi
- c Pharmaceutics Research Laboratory, School of Life Sciences , Arundel Building, University of Sussex , Brighton , UK.,d Applied Drug Research Center and Faculty of Pharmacy , Tabriz University of Medical Sciences , Tabriz, Iran
| | - Fatemeh Sadeghi
- b Department of Pharmaceutics, School of pharmacy , Mashhad University of Medical Sciences , Mashhad , Iran.,e Targeted Drug Delivery Research Center , Mashhad University of Medical Sciences , Mashhad , Iran
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Granicka LH, Wdowiak M, Kosek A, Swiezewski S, Wasilewska D, Jankowska E, Weryński A, Kawiak J. Survival Analysis of Escherichia coli Encapsulated in a Hollow Fiber Membrane In Vitro and In Vivo: Preliminary Report. Cell Transplant 2017; 14:323-30. [PMID: 16052913 DOI: 10.3727/000000005783983043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The purpose of the observations was the viability and quality evaluation of E. coli bacteria encapsulated in hollow fiber membranes (HF) in short in vivo and in vitro experiments. A polypropylene, surface-modified hollow fiber was applied for immunoisolation of E. coli bacteria transfected with a green fluorescent protein (E. coli GFPI). The presence of GFP fluorescence of organisms was assessed with the use of flow cytometry. The E. coli GFPIs were then observed for the period of 5 days in in vitro experiments in the culture medium. A single IPTG (isopropyl β-D-1-thiogalactopyranoside) induction of GFP gene appeared to be adequate for an expression of GFP protein for 5 days. The GFP expression values observed for E. coli GFPs encapsulated in HF during culture in different culture media were comparable. The survival of E. coli GFPIs encapsulated in HF after 1, 2, 4, or 5 days of subcutaneous implantation into mice was evaluated. The explanted E. coli GFPIs exhibited mean expression 603 ± 17 (n = 32) units of fluorescence during the implantation period. The values obtained were comparable for selected days of observation. It was observed that the membranes applied ensured the bacteria growth within the HF's space only.
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Affiliation(s)
- L H Granicka
- PAS, Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland
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Takeungwongtrakul S, Benjakul S. Effect of Glucose Syrup and Fish Gelatin on Physicochemical Properties and Oxidative Stability of Spray-Dried Micro-Encapsulated Shrimp Oil. J FOOD PROCESS PRES 2016. [DOI: 10.1111/jfpp.12876] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Sirima Takeungwongtrakul
- Department of Agricultural Education, Faculty of Industrial Education; King Mongkut's Institute of Technology Ladkrabang; Ladkrabang Bangkok 10520 Thailand
| | - Soottawat Benjakul
- Department of Food Technology, Faculty of Agro-Industry; Prince of Songkla University; Hat Yai Songkhla 90112 Thailand
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Outuki PM, de Francisco LMB, Hoscheid J, Bonifácio KL, Barbosa DS, Cardoso MLC. Development of arabic and xanthan gum microparticles loaded with an extract of Eschweilera nana Miers leaves with antioxidant capacity. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.04.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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São Pedro A, Fernandes R, Flora Villarreal C, Fialho R, Cabral Albuquerque E. Opioid-based micro and nanoparticulate formulations: alternative approach on pain management. J Microencapsul 2016; 33:18-29. [DOI: 10.3109/02652048.2015.1134687] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Takeungwongtrakul S, Benjakul S, H-kittikun A. Wall materials and the presence of antioxidants influence encapsulation efficiency and oxidative stability of micro-encapsulated shrimp oil. EUR J LIPID SCI TECH 2014. [DOI: 10.1002/ejlt.201400235] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sirima Takeungwongtrakul
- Department of Food Technology; Faculty of Agro-Industry; Prince of Songkla University; Hat Yai Songkhla Thailand
| | - Soottawat Benjakul
- Department of Food Technology; Faculty of Agro-Industry; Prince of Songkla University; Hat Yai Songkhla Thailand
| | - Aran H-kittikun
- Department of Industrial Biotechnology; Faculty of Agro-Industry; Prince of Songkla University; Hat Yai Songkhla Thailand
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Zhang H, Zhao Y, Wang X, Zhang Q. Bioavailability of tramadol hydrochloride after administration via different routes in rats. Biopharm Drug Dispos 2014; 35:525-31. [DOI: 10.1002/bdd.1916] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 08/15/2014] [Accepted: 08/19/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Hua Zhang
- Department of Pharmaceutics, School of Pharmaceutical Science; Peking University; Beijing 100191 China
| | - Youyou Zhao
- Department of Pharmaceutics, School of Pharmaceutical Science; Peking University; Beijing 100191 China
| | - Xueqing Wang
- Department of Pharmaceutics, School of Pharmaceutical Science; Peking University; Beijing 100191 China
| | - Qiang Zhang
- Department of Pharmaceutics, School of Pharmaceutical Science; Peking University; Beijing 100191 China
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Ge Z, Yang M, Wang Y, Shan L, Gao C. Preparation and evaluation of orally disintegrating tablets of taste masked phencynonate HCl using ion-exchange resin. Drug Dev Ind Pharm 2014; 41:934-41. [DOI: 10.3109/03639045.2014.914529] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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22
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Villacrez JL, Carriazo JG, Osorio C. Microencapsulation of Andes Berry (Rubus glaucus Benth.) Aqueous Extract by Spray Drying. FOOD BIOPROCESS TECH 2013. [DOI: 10.1007/s11947-013-1172-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Kamel R, Basha M, El Awdan S. Development and evaluation of long-acting epidural “smart” thermoreversible injection loaded with spray-dried polymeric nanospheres using experimental design. J Drug Target 2013; 21:277-290. [DOI: 10.3109/1061186x.2012.747527] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Doraswamy K, Venkata Ramana P. Synthesis, characterization, and evaluation of differently sulfonated resins as novel carriers for drug delivery. Des Monomers Polym 2012. [DOI: 10.1080/15685551.2012.705490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- K. Doraswamy
- a Department of Chemistry , Sri Krishnadevaraya University , Anatapur , 515 003 , India
| | - P. Venkata Ramana
- a Department of Chemistry , Sri Krishnadevaraya University , Anatapur , 515 003 , India
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Jindal AB, Wasnik MN, Nair HA. Synthesis of thiolated alginate and evaluation of mucoadhesiveness, cytotoxicity and release retardant properties. Indian J Pharm Sci 2011; 72:766-74. [PMID: 21969750 PMCID: PMC3178979 DOI: 10.4103/0250-474x.84590] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 12/27/2010] [Accepted: 12/28/2010] [Indexed: 11/25/2022] Open
Abstract
Modification of polymers by covalent attachment of thiol bearing pendant groups is reported to impart many beneficial properties to them. Hence in the present study, sodium alginate–cysteine conjugate was synthesized by carbodiimide mediated coupling under varying reaction conditions and the derivatives characterized for thiol content. The thiolated alginate species synthesized had bound thiol content ranging from 247.8±11.03–324.54±10.107 ΅mol/g of polymer depending on the reaction conditions. Matrix tablets based on sodium alginate-cysteine conjugate and native sodium alginate containing tramadol hydrochloride as a model drug were prepared and mucoadhesive strength and in vitro drug release from the tablets were compared. Tablets containing 75 mg sodium alginate-cysteine conjugate could sustain release of 10 mg of model drug for 3 h, whereas 90% of the drug was released within 1 h from corresponding tablets prepared using native sodium alginate. An approximately 2-fold increase in the minimal detachment force of the tablets from an artificial mucin film was observed for sodium alginate–cysteine conjugate as compared to native sodium alginate. In vitro cytotoxicity studies in L-929 mouse fibroblast cells studied using an MTT assay revealed that at low concentrations of polymer, sodium alginate–cysteine conjugate was less toxic to L-929 mouse fibroblast cell line when compared to native sodium alginate. Hence, thiolation is found to be a simple route to improving polymer performance. The combination of improved controlled drug release and mucoadhesive properties coupled with the low toxicity of these new excipients builds up immense scope for the use of thiolated polymers in mucoadhesive drug delivery systems.
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Affiliation(s)
- A B Jindal
- Department of Pharmaceutics, Bombay College of Pharmacy, Kalina, Mumbai, India
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Rogers TL, Wallick D. Reviewing the use of ethylcellulose, methylcellulose and hypromellose in microencapsulation. Part 3: Applications for microcapsules. Drug Dev Ind Pharm 2011; 38:521-39. [DOI: 10.3109/03639045.2011.616512] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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27
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Rogers TL, Wallick D. Reviewing the use of ethylcellulose, methylcellulose and hypromellose in microencapsulation. Part 1: materials used to formulate microcapsules. Drug Dev Ind Pharm 2011; 38:129-57. [DOI: 10.3109/03639045.2011.590990] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Suh JW, Seung KB, Gwak CH, Kim KS, Hong SJ, Park TH, Kim SH, Choi YJ, Joo SJ, Tahk SJ, Kim HS. Comparison of antiplatelet effect and tolerability of clopidogrel resinate with clopidogrel bisulfate in patients with coronary heart disease (CHD) or CHD-equivalent risks: a phase IV, prospective, double-dummy, parallel-group, 4-week noninferiority trial. Clin Ther 2011; 33:1057-68. [PMID: 21816478 DOI: 10.1016/j.clinthera.2011.07.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND Clopidogrel resinate is a resinate complex of (+)-clopidogrel optical isomer, wherein the (+)-clopidogrel isomer binds to a water-soluble cation exchange resin via sulfonic acid groups. It was approved by the Korean Food and Drug Administration on the basis of a Phase I study that demonstrated the bioequivalence of clopidogrel resinate and clopidogrel bisulfate. However, there are no available data regarding efficacy and tolerability in patients with vascular disease. OBJECTIVE The goal of this study was to investigate the antiplatelet efficacy and tolerability of clopidogrel resinate in patients with coronary heart disease (CHD) or CHD-equivalent risks. METHODS This study was a Phase IV, randomized, double-blind, double-dummy, parallel-group, noninferiority trial. We prospectively recruited patients in 10 centers between March 2008 and July 2008. Patients who had documented CHD or CHD-equivalent risks were randomly assigned to 1 of 3 groups: group A, aspirin (100 mg) + clopidogrel bisulfate placebo + clopidogrel resinate placebo; group B, aspirin (100 mg) + clopidogrel bisulfate placebo + clopidogrel resinate (75 mg); or group C, aspirin (100 mg) + clopidogrel bisulfate (75 mg) + clopidogrel resinate placebo. The primary outcome was the percent P2Y(12) inhibition after medication, assessed by using a point-of-care assay. If the 1-sided 90% upper confidence limit for the difference was less than the prespecified delta value (-5.7), clopidogrel resinate would be considered noninferior to clopidogrel bisulfate. The secondary outcome, the prevalence of adverse events (AEs) associated with study medications, was assessed at each visit by direct interview. RESULTS A total of 314 patients (mean [SD] age, 62.2 [9.0] years; male 63.7%; weight, 67.3 [13.6] kg [range, 45-102 kg]; all Asian) were enrolled, and 287 patients finished the study (group A, n = 97; group B, n = 90; and group C, n = 100). Eight patients took no study medications and were excluded from the tolerability and efficacy analyses. Nineteen patients discontinued the study because of protocol violation (n = 15), adverse events (n = 3), or voluntary withdrawal (n = 1) and were excluded from the efficacy analysis. There were no significant differences in baseline clinical characteristics among the groups except for the frequency of a history of CHD (group A, 85.4%; group B, 73.0%; and group C, 88.3%; P = 0.01). Patients treated with either type of clopidogrel showed significant inhibition (mean [SD]) of P2Y(12) (group A, -5.9% [15.1%]; group B, 23.4% [21.9%]; and group C, 19.5% [23.8%]; P < 0.001). Differences between clopidogrel resinate and clopidogrel bisulfate in the inhibition of P2Y(12) did not exceed the predetermined value for inferiority (P for noninferiority, 0.02; 90% CI, -0.9 to 10.3). In the tolerability analysis, there was no mortality during the study period and no significant differences between groups in the frequency of AEs and serious AEs (AEs: group A, 33.0%; group B, 26.0%; and group C, 23.3% [P = 0.27]; serious AEs: group A, 1.0%; group B, 3.0%; and group C, 1.0% [P = 0.42]). One patient in group B underwent coronary stent implantation for treatment of stable angina. CONCLUSIONS In this small, selected Asian patient population, differences in the platelet inhibition efficacies of clopidogrel resinate and clopidogrel bisulfate did not exceed the predetermined limits for noninferiority. The differences in tolerability between the 2 drugs did not reach statistical significance.
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Affiliation(s)
- Jung-Won Suh
- Cardiovascular Center, Seoul National University Hospital, Korea
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Abstract
To avoid destruction of the implanted biological material it may be separated from host immunological system by enclosure within a permiselective membrane. Two-directional diffusion through the membrane of nutrients, metabolic products, as well as bioactive products of encapsulated cells is required to ensure their survival and functional activities. The system of cells encapsulated within the membrane releasing the biologically active substance may be applied either locally to give an opportunity of therapeutic agent activity in the specified place and/or at some convenient site (tissue) for a prolonged period of time.The novel system of bacteria bio-encapsulation using modified membranes, and its assessment by flow cytometry is described and discussed. The encapsulated in membrane bacteria, functioning and releasing their products were evaluated in the systems in vitro and in vivo. The bacteria cells products impact on Eukariotic cells was evaluated. The cytometric evaluation demonstrates the membrane ability to avoid the release of bacteria enclosed within the membrane wall. In experiments with treatment of the bacteria with antibiotic to release products from damaged bacteria it was possible to distinguish stages of the applied antibiotic impact on encapsulated bacteria cells. In E. coli following stages were distinguished: induction of membrane permeability to PI, activation of proteases targeting GFP (protein) and subsequent nucleic acids degradation. In the another experiment the evidence was presented of the cytotoxic activity of live Bacillus subtilis encapsulated within the membrane system. The Bacilus products mediated by secreted listeriolysin O (LLO) on the chosen eukaryotic cells was evaluated. Similar systems releasing bacterial products locally and continuously may selectively affect different types of cells and may have possible application in the anticancer treatment at localized sites.
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Dürrigl M, Lusina Kregar M, Hafner A, Šegvić Klarić M, Filipović-Grčić J. Mupirocin calcium microencapsulation via spray drying: feed solvent influence on microparticle properties, stability and antimicrobial activity. Drug Dev Ind Pharm 2011; 37:1402-14. [DOI: 10.3109/03639045.2011.580350] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Rogers TL, Wallick D. Reviewing the use of ethylcellulose, methylcellulose and hypromellose in microencapsulation. Part 2: Techniques used to make microcapsules. Drug Dev Ind Pharm 2011; 37:1259-71. [DOI: 10.3109/03639045.2011.567275] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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32
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Pea (Pisum sativum, L.) Protein Isolate Stabilized Emulsions: A Novel System for Microencapsulation of Lipophilic Ingredients by Spray Drying. FOOD BIOPROCESS TECH 2011. [DOI: 10.1007/s11947-010-0497-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Calderó G, García-Celma MJ, Solans C. Formation of polymeric nano-emulsions by a low-energy method and their use for nanoparticle preparation. J Colloid Interface Sci 2011; 353:406-11. [DOI: 10.1016/j.jcis.2010.09.073] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 09/23/2010] [Accepted: 09/24/2010] [Indexed: 10/19/2022]
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Abstract
There are many reports in the literature referring to the utilization of drug bound to ion-exchange resin (drug-resinate), especially in the drug delivery area. Ion-exchange resin complexes, which can be prepared from both acidic and basic drugs, have been widely studied and marketed. Salts of cationic and anionic exchange resins are insoluble complexes in which drug release results from exchange of bound drug ions by ions normally present in body fluids. Resins used are polymers that contain appropriately substituted acidic groups, such as carboxylic and sulfonic for cation exchangers; or basic groups, such as quaternary ammonium group for anion exchangers. Variables relating to the resin are the exchange capacity; degree of cross-linking, which determines the permeability of the resin, its swelling potential, and the access of the exchange sites to the drug ion; the effective pK(a) of the exchanging group, which determines the exchange affinity; and the resin particle size, which controls accessibility to the exchange ions. In this review, the properties of ion-exchange resins, selection of drugs that lend themselves to such an approach, selection of the appropriate resin, preparation of drug-resinate, evaluation of drug release, recent developments of drug-resinates, and applications are discussed.
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Affiliation(s)
- Xiaodi Guo
- Huahai US Inc., 2002 Eastpark Blvd., Cranbury, New Jersey 08512, USA
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35
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Akkaramongkolporn P, Ngawhirunpat T, Opanasopit P. Preparation and evaluation of differently sulfonated styrene-divinylbenzene cross-linked copolymer cationic exchange resins as novel carriers for drug delivery. AAPS PharmSciTech 2009; 10:641-8. [PMID: 19452281 DOI: 10.1208/s12249-009-9259-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Accepted: 04/23/2009] [Indexed: 11/30/2022] Open
Abstract
The differently sulfonated styrene-divinylbenzene cross-linked copolymer cationic exchange resins were prepared by oil-in-water polymerization and varied degrees of sulfonation. Several characteristics of the obtained resins were evaluated, i.e., Fourier transform infrared spectra, the ion-exchange capacity, microscopic morphology, size, and swelling. The resin characteristics were altered in relation to the degree of sulfonation, proving that differently sulfonated resins could be prepared. The behavior of chlorpheniramine (CPM) loading and in vitro release in the USP simulated gastric (SGF) and intestinal fluids (SIF) of the obtained resins were also evaluated. The CPM loaded in the resinates (drug-loaded resins) increased with the increasing degree of sulfonic group and hence the drug binding site in the employed resins. The CPM release was lower from the resins with the higher degree of sulfonic group due to the increase in the diffusive path depth. The CPM release was obviously lower in SGF than SIF because CPM, a weak base drug, ionized to a greater extent in SGF and then preferred binding with rather than releasing from the resins. In conclusion, the differently sulfonated resins could be utilized as novel carriers for drug delivery.
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Pereira HVR, Saraiva KP, Carvalho LMJ, Andrade LR, Pedrosa C, Pierucci APTR. Legumes seeds protein isolates in the production of ascorbic acid microparticles. Food Res Int 2009. [DOI: 10.1016/j.foodres.2008.10.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Akkaramongkolporn P, Kulvanich P, Pathipvanich M. Preparation and In Vitro Release of Dual-Drug Resinates Containing Equivalent Content Dextromethorphan and Diphenhydramine. Drug Dev Ind Pharm 2008; 32:483-96. [PMID: 16638687 DOI: 10.1080/03639040500529143] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The dual-drug resinate containing equivalent content of dextromethorphan hydrobromide (DTM) and diphenhydramine hydrochloride (DPH) was developed and characterized. To achieve this specific resinate, a procedure of simultaneous dual-drug loading using loading solutions composed of different proportions of DTM and DPH was performed and a dual-drug loading diagram was constructed to determine the equivalent drug loading solution (ELS) and also the estimated equivalent drug content (EQC). The effects of resin crosslinkage, overall drug concentration of the loading solution, and temperature during drug loading on the values of ELS and EQC were assessed. The increased overall drug concentration from 0.25 to 1.0% w/v elevated the EQC values from 18 to 35% w/w for low crosslinked resins (Dowex 50 W x 2 and x 4), and from 18 to 27% w/w for high crosslinked resin (Dowex 50 W x 8). It also changed the values of ELS from 0.50 to 0.48 for the low crosslinked resins, and 0.50 to 0.55 for the high crosslinked resin. For the high crosslinked resin, the applied heat from 35 to 65 degrees C further increased the values of EQC from 27 to 32% w/w, and changed the values of ELS in the reverse direction from 0.55 to 0.48. However, the heat did not exert significant effects on the values of EQC and ELS for the low crosslinked resins. Different batches of dual-drug resinates prepared from the determined ELS provided the resultant resinates with equivalent contents of DTM and DPH which were very close to the estimated EQC. The drug release from the resinates was performed in 0.05, 0.1, 0.2, and 0.4 N of KCl solutions. The increased ionic strength generally accelerated the release of both drugs except for 0.4 N KCl solution in which the drug release from the resinates of high crosslinkage was decreased. The congestion on the outward movement of drugs through the high crosslinked matrix might cause the delay of drug release. In conclusion, the release study demonstrated that the dual-drug resinate using a suitable crosslinked resin could be used for extended delivery of two combined drugs with the equivalent therapeutic dose.
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Affiliation(s)
- Prasert Akkaramongkolporn
- Department of Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
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38
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Jeong SH, Park K. Drug loading and release properties of ion-exchange resin complexes as a drug delivery matrix. Int J Pharm 2008; 361:26-32. [DOI: 10.1016/j.ijpharm.2008.05.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 05/07/2008] [Accepted: 05/07/2008] [Indexed: 10/22/2022]
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The efficacy and safety of clopidogrel resinate as a novel polymeric salt form of clopidogrel. Arch Pharm Res 2008; 31:250-8. [DOI: 10.1007/s12272-001-1149-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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40
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Badulescu R, Vivod V, Jausovec D, Voncina B. Grafting of ethylcellulose microcapsules onto cotton fibers. Carbohydr Polym 2008. [DOI: 10.1016/j.carbpol.2007.05.028] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Li ZZ, Chen JF, Liu F, Liu AQ, Wang Q, Sun HY, Wen LX. Study of UV-shielding properties of novel porous hollow silica nanoparticle carriers for avermectin. PEST MANAGEMENT SCIENCE 2007; 63:241-6. [PMID: 17177171 DOI: 10.1002/ps.1301] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The shielding protection given by self-prepared porous hollow silica nanoparticles (PHSN) to pesticides from degradation by UV light was investigated using avermectin as a model pesticide. It was demonstrated that PHSN carriers with a shell thickness of approximately 15 nm and a pore diameter of 4-5 nm have an encapsulation capacity of 625 g kg(-1) for avermectin using a supercritical fluid loading method. PHSN carriers exhibited remarkable UV-shielding properties for avermectin. This was affected by the intensity of UV light, the pH and the temperature of the release medium. Rises in UV intensity, pH and/or temperature reduced the UV protection of PHSN for avermectin. In addition, avermectin loaded into the inner core of the PHSN carriers was released slowly into the release medium for about 30 days following a typical sustained-release pattern. It thus appears that PHSN carriers have a promising future in applications requiring sustained pesticide release.
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Affiliation(s)
- Zhu-Zhu Li
- Key Lab for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, PR China
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42
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Varshosaz J, Tavakoli N, Kheirolahi F. Use of hydrophilic natural gums in formulation of sustained-release matrix tablets of tramadol hydrochloride. AAPS PharmSciTech 2006; 7:E168-E174. [PMID: 28290039 PMCID: PMC2750731 DOI: 10.1208/pt070124] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2005] [Accepted: 10/31/2005] [Indexed: 11/30/2022] Open
Abstract
The objective of this work was to develop matrix sustained-release tablets of highly water-soluble tramadol HCl using natural gums (xanthan [X gum] and guar [G gum]) as cost-effective, nontoxic, easily available, and suitable hydrophilic matrix systems compared with the extensively investigated hydrophilic matrices (ie, hydroxypropyl methylcellulose [HPMC]/carboxymethyl cellulose [CMC] with respect to in vitro drug release rate) and hydration rate of the polymers. Matrix tablets of tramadol (dose 100 mg) were produced by direct compression method. Different ratios, of 100∶0, 80∶20, 60∶40, 20∶80, 0∶100 of G gum (or X):HPMC, X gum:G gum, and triple mixture of these polymers (G gum, X gum, HPMC) were applied. After evaluation of physical characteristics of tablets, the dissolution test was, performed in the phosphate buffer media (pH 7.4) up to 8 hours. Tablets with only X had the highest mean dissolution time (MDT), the least dissolution efficiency (DE8%), and released the drug following a zero-order model via swelling, diffusion, and erosion mechanisms. Guar gum alone could not efficiently control the drug release, while X and all combinations of natural gums with HPMC could retard tramadol HCl release. However, according to the similarity factor (f 2), pure HPMC and H8G2 were the most similar formulations to Topalgic-LP as the reference standard.
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Affiliation(s)
- Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Naser Tavakoli
- Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Kheirolahi
- Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
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43
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Fundueanu G, Constantin M, Esposito E, Cortesi R, Nastruzzi C, Menegatti E. Cellulose acetate butyrate microcapsules containing dextran ion-exchange resins as self-propelled drug release system. Biomaterials 2005; 26:4337-47. [PMID: 15683658 DOI: 10.1016/j.biomaterials.2004.10.036] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2004] [Accepted: 10/26/2004] [Indexed: 11/26/2022]
Abstract
Sulfopropylated dextran microspheres (SP-Ms), (Dm = 80 microm) loaded with a water soluble drug (Tetracycline HCl), were included in cellulose acetate butyrate (CAB) microcapsules. Spherical CAB microcapsules were obtained by oil in water (o/w) solvent evaporation method in the presence of an inert solvent as cyclohexane (CyH) or n-hexane (N-Hex), and different excipients (Phospholipon, Tween, Span, Eudragit RS 100). Chloroform was found to be the best solvent for the preparation of the microcapsules. Also, the sphericity as well as the porosity of the microcapsules was controlled by the presence of an inert solvent. The final concentration of the drug in CAB microparticles was up to 25% (w/w). The key factors for the successful preparation were also the viscosity of the polymer, while the wettability of the resulted microcapsules, the temperature of the preparation, and the porosity have modulated the release of the drug. The higher is the amount of encapsulated microspheres the thinner is the CAB wall between the compartments created by their incorporation. When these microspheres come in contact with the release medium, the pressure created by their swelling breaks the polymer film and the drug starts to be released. The more drug is released in phosphate buffer the higher is the swelling degree of the encapsulated ion exchange resins and the force created by their supplementary swelling will break the more resistants walls. In this way a self-propelled drug release is achieved, until almost all drug was eliberated.
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Affiliation(s)
- Gheorghe Fundueanu
- Department of Pharmaceutical Sciences, University of Ferrara, I-44100 Ferrara, Italy.
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45
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Bruschi ML, Cardoso MLC, Lucchesi MB, Gremião MPD. Gelatin microparticles containing propolis obtained by spray-drying technique: preparation and characterization. Int J Pharm 2003; 264:45-55. [PMID: 12972335 DOI: 10.1016/s0378-5173(03)00386-7] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Gelatin microparticles containing propolis extractive solution (PES) were prepared by spray-drying technique. The optimization of the spray-drying operating conditions and the proportions of gelatin and mannitol were investigated. Regular particle morphology was obtained when mannitol was used, whereas mannitol absence produced a substantial number of coalesced and agglomerated microparticles. Microparticles had a mean diameter of 2.70 microm without mannitol and 2.50 microm with mannitol. The entrapment efficiency for propolis of the microparticles was upto 41% without mannitol and 39% with mannitol. The microencapsulation by spray-drying technique maintained the activity of propolis against Staphylococcus aureus. These gelatin microparticles containing propolis would be useful for developing intermediary or eventual propolis dosage form without the PES' strong and unpleasant taste, aromatic odour, and presence of ethanol.
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Affiliation(s)
- M L Bruschi
- Departamento de Farmácia e Farmacologia, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900, Maringá, PR, Brazil
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Tiwari SB, Murthy TK, Pai MR, Mehta PR, Chowdary PB. Controlled release formulation of tramadol hydrochloride using hydrophilic and hydrophobic matrix system. AAPS PharmSciTech 2003; 4:E31. [PMID: 14621963 PMCID: PMC2750624 DOI: 10.1208/pt040331] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2003] [Accepted: 05/14/2003] [Indexed: 11/30/2022] Open
Abstract
The effect of concentration of hydrophilic (hydroxypropyl methylcellulose [HPMC]) and hydrophobic polymers (hydrogenated castor oil [HCO], ethylcellulose) on the release rate of tramadol was studied. Hydrophilic matrix tablets were prepared by wet granulation technique, while hydrophobic (wax) matrix tablets were prepared by melt granulation technique and in vitro dissolution studies were performed using United States Pharmacopeia (USP) apparatus type II. Hydrophobic matrix tablets resulted in sustained in vitro drug release (>20 hours) as compared with hydrophilic matrix tablets (<14 hours). The presence of ethylcellulose in either of the matrix systems prolonged the release rate of the drug. Tablets prepared by combination of hydrophilic and hydrophobic polymers failed to prolong the drug release beyond 12 hours. The effect of ethylcellulose coating (Surelease) and the presence of lactose and HPMC in the coating composition on the drug release was also investigated. Hydrophobic matrix tablets prepared using HCO were found to be best suited for modulating the delivery of the highly water-soluble drug, tramadol hydrochloride.
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Affiliation(s)
- Sandip B Tiwari
- Department of Novel Drug Delivery Systems, Zydus Research Centre, Sarkhej Bavala National Highway No 8A, Moraiya, Ahmedabad- 382 213, Gujarat, India.
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47
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Grattard N, Pernin M, Marty B, Roudaut G, Champion D, Le Meste M. Study of release kinetics of small and high molecular weight substances dispersed into spray-dried ethylcellulose microspheres. J Control Release 2002; 84:125-35. [PMID: 12468216 DOI: 10.1016/s0168-3659(02)00260-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spray-dried ethylcellulose microspheres were used as matrices for the encapsulation of a fungal lactase and/or small paramagnetic probes (Tempol or Tempo). Their dissolution in water was studied. Kinetics fitted with the model Q = kt(n) of Korsemeyer et al. [Int. J. Pharm. 15 (1983) 25] exhibited a non-Fickian diffusion. The calculated diffusional exponent (n) values were near 0.26 whatever the encapsulated probes. The release rates (k) were only slightly different for paramagnetic probes and lactase. This result indicated that the probes' release mechanisms are not diffusion controlled. Other factors such as matrix porosity and probe solubility in the matrix and in water could influence the probes' release rate.
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Affiliation(s)
- Nicolas Grattard
- Laboratoire d'Ingénierie Moléculaire et Sensorielle de l'Aliment, ENSBANA, 1, Esplanade Erasme, 21000 Dijon, France.
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