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Soltani F, Kamali H, Akhgari A, Afrasiabi Garekani H, Nokhodchi A, Sadeghi F. Formulation and optimization of a single-layer coat for targeting budesonide pellets to the descending Colon. Pharm Dev Technol 2024; 29:212-220. [PMID: 38392961 DOI: 10.1080/10837450.2024.2321250] [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: 05/03/2023] [Accepted: 02/16/2024] [Indexed: 02/25/2024]
Abstract
The current budesonide formulations are inadequate for addressing left-sided colitis, and patients might hesitate to use an enema for a prolonged time. This study focuses on developing a single-layer coating for budesonide pellets targeting the descending colon. Pellets containing budesonide (1.5%w/w), PVP K30 (5%w/w), lactose monohydrate (25%w/w) and Avicel pH 102 (68.5%w/w) were prepared using extrusion spheronization technique. Coating formulations were designed using response surface methodology with pH and time-dependent Eudragits. Dissolution tests were conducted at different pH levels (1.2, 6.5, 6.8, and 7.2). Optimal coating formulation, considering coating level and the Eudragit (S + L) ratio to the total coating weight, was determined. Budesonide pellets were coated with the optimized composition and subjected to continuous dissolution testing simulating the gastrointestinal tract. The coating, with 48% S, 12% L, and 40% RS at a 10% coating level, demonstrated superior budesonide delivery to the descending colon. Coated pellets had a spherical shape with a uniform 30 µm thickness coating, exhibiting pH and time-dependent release. Notably, zero-order release kinetics was observed for the last 9 h in colonic conditions. The study suggests that an optimized single-layer coating, incorporating pH and time-dependent polymers, holds promise for consistently delivering budesonide to the descending colon.
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Affiliation(s)
- Fatemeh Soltani
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Kamali
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Abbas Akhgari
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hadi Afrasiabi Garekani
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Nokhodchi
- Pharmaceutics Research Laboratory, Arundel Building, School of Life Sciences, University of Sussex, Brighton, UK
- Lupin Pharmaceutical Research Inc, Coral Springs, Florida, USA
| | - Fatemeh Sadeghi
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
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Awad A, Madla CM, McCoubrey LE, Ferraro F, Gavins FK, Buanz A, Gaisford S, Orlu M, Siepmann F, Siepmann J, Basit AW. Clinical translation of advanced colonic drug delivery technologies. Adv Drug Deliv Rev 2022; 181:114076. [PMID: 34890739 DOI: 10.1016/j.addr.2021.114076] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/26/2021] [Accepted: 12/02/2021] [Indexed: 12/12/2022]
Abstract
Targeted drug delivery to the colon offers a myriad of benefits, including treatment of local diseases, direct access to unique therapeutic targets and the potential for increasing systemic drug bioavailability and efficacy. Although a range of traditional colonic delivery technologies are available, these systems exhibit inconsistent drug release due to physiological variability between and within individuals, which may be further exacerbated by underlying disease states. In recent years, significant translational and commercial advances have been made with the introduction of new technologies that incorporate independent multi-stimuli release mechanisms (pH and/or microbiota-dependent release). Harnessing these advanced technologies offers new possibilities for drug delivery via the colon, including the delivery of biopharmaceuticals, vaccines, nutrients, and microbiome therapeutics for the treatment of both local and systemic diseases. This review details the latest advances in colonic drug delivery, with an emphasis on emerging therapeutic opportunities and clinical technology translation.
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3
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Screening of pharmaceutical polymers for extrusion-Based Additive Manufacturing of patient-tailored tablets. Int J Pharm 2020; 586:119591. [DOI: 10.1016/j.ijpharm.2020.119591] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 11/23/2022]
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4
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Nalinbenjapun S, Ovatlarnporn C. Chitosan-5-aminosalicylic acid conjugates for colon-specific drug delivery: Methods of preparation and in vitro evaluations. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2019.101397] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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5
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Fuenmayor E, Forde M, Healy AV, Devine DM, Lyons JG, McConville C, Major I. Comparison of fused-filament fabrication to direct compression and injection molding in the manufacture of oral tablets. Int J Pharm 2019; 558:328-340. [PMID: 30659922 DOI: 10.1016/j.ijpharm.2019.01.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/09/2019] [Accepted: 01/11/2019] [Indexed: 01/12/2023]
Abstract
Oral tablets are a convenient form to deliver active pharmaceutical ingredients (API) and have a high level of acceptance from clinicians and patients. There is a wide range of excipients available for the fabrication of tablets thereby offering a versatile platform for the delivery of therapeutic agents to the gastrointestinal tract. However, the geometry of tablets is limited by conventional manufacturing processes. This study aimed to compare three manufacturing processes in the production of flat-faced oral tablets using the same formulation composed of a polymer blend and caffeine as a model drug: fused-filament fabrication (FFF), direct compression (DC) and injection molding (IM). Hot-melt extrusion was used to convert a powder blend into feedstock material for FFF and IM processes, while DC was performed on the powder mixture. Tablets were produced with the same dimensions and were characterized for their physical and dissolution properties. There were statistical differences in the physical properties and drug release profiles of the tablets produced by the different manufacturing processes. DC tablets displayed immediate release, IM provided sustained release over 48 h, and FFF tablets displayed both release types depending on the printing parameters. FFF continues to demonstrate high potential as a manufacturing process for the efficient production of personalized oral tablets.
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Affiliation(s)
- Evert Fuenmayor
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Ireland
| | - Martin Forde
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Ireland
| | - Andrew V Healy
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Ireland
| | - Declan M Devine
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Ireland
| | - John G Lyons
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Ireland
| | - Christopher McConville
- School of Pharmacy, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, UK
| | - Ian Major
- Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Ireland.
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6
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3D printing of high drug loaded dosage forms using thermoplastic polyurethanes. Int J Pharm 2018; 536:318-325. [DOI: 10.1016/j.ijpharm.2017.12.002] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/29/2017] [Accepted: 12/02/2017] [Indexed: 11/23/2022]
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7
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Elzayat EM, Abdel-Rahman AA, Ahmed SM, Alanazi FK, Habib WA, Abou-Auda HS, Sakr A. Formulation and pharmacokinetics of multi-layered matrix tablets: Biphasic delivery of diclofenac. Saudi Pharm J 2016; 25:688-695. [PMID: 28725140 PMCID: PMC5506666 DOI: 10.1016/j.jsps.2016.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 10/07/2016] [Indexed: 11/29/2022] Open
Abstract
The rapid availability of the drug at the site of action followed by maintaining its effect for a long period of time is of great clinical importance. Thus, the purpose of the present study was to prepare and evaluate multi-layered matrix tablets of diclofenac using Eudragit RL/RS blend to achieve both immediate and sustained therapeutic effects. Diclofenac potassium (25 mg) was incorporated in an outer immediate release layer to provide immediate pain relief whereas diclofenac sodium (75 mg) was incorporated in the inner core to provide extended drug release. Wet granulation was employed to prepare the inner core of the tablets that were further layered with an immediate release drug layer in the perforated pan coater. The in-vitro and in-vivo performance of the developed formulation was compared with the marketed products Voltaren® SR 75 mg and Cataflam® 25 mg. The in-vitro drug release of the prepared formulation showed similarity (f2 = 66.19) to the marketed product. The pharmacokinetic study showed no significant difference (p > 0.05) in AUC0-24 and Cmax between the test and reference formulations. The AUC0-24 values were 105.36 ± 83.3 and 92.87 ± 55.53 μg h/ml whereas the Cmax values were 11.25 ± 6.87 and 12.97 ± 8.45 μg/ml, for the test and reference, respectively. The multi-layered tablets were proved to be bioequivalent with the commercially available tablets and were in agreement with the observed in-vitro drug release results. Stable physical characteristics and drug release profiles were observed in both long term and accelerated conditions stability studies.
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Affiliation(s)
- Ehab Mostafa Elzayat
- Department of Pharmaceutics, Kayyali Research Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh 11451, P.O. Box: 2457, Saudi Arabia
| | | | - Sayed Mohamed Ahmed
- Department of Industrial Pharmacy, College of Pharmacy, Assiut University, Assiut, Egypt
| | - Fars Kaed Alanazi
- Department of Pharmaceutics, Kayyali Research Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh 11451, P.O. Box: 2457, Saudi Arabia.,Supervisor of Kayyali Research Chair for Pharmaceutical Industries, Riyadh, Saudi Arabia
| | - Walid Abdulazim Habib
- Department of Pharmaceutics, Kayyali Research Chair for Pharmaceutical Industries, College of Pharmacy, King Saud University, Riyadh 11451, P.O. Box: 2457, Saudi Arabia
| | - Hisham Suliman Abou-Auda
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Adel Sakr
- Department of Industrial Pharmacy, College of Pharmacy, Future University in Egypt, Cairo, Egypt
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Tan HL, Tan LS, Wong YY, Muniyandy S, Hashim K, Pushpamalar J. Dual crosslinked carboxymethyl sago pulp/pectin hydrogel beads as potential carrier for colon-targeted drug delivery. J Appl Polym Sci 2016. [DOI: 10.1002/app.43416] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Hui Li Tan
- School of Science; Monash University Malaysia, Jalan Lagoon Selatan; Petaling Jaya Selangor Darul Ehsan Malaysia
| | - Li Shan Tan
- School of Science; Monash University Malaysia, Jalan Lagoon Selatan; Petaling Jaya Selangor Darul Ehsan Malaysia
| | - Yeon Yin Wong
- School of Science; Monash University Malaysia, Jalan Lagoon Selatan; Petaling Jaya Selangor Darul Ehsan Malaysia
| | - Saravanan Muniyandy
- School of Pharmacy; Monash University Malaysia, Jalan Lagoon Selatan; Petaling Jaya Selangor Darul Ehsan Malaysia
| | - Kamaruddin Hashim
- Malaysian Nuclear Agency; Radiation Modification of Polymer Group, Radiation Processing Technology Division; Selangor Darul Ehsan 43000 Malaysia
| | - Janarthanan Pushpamalar
- School of Science; Monash University Malaysia, Jalan Lagoon Selatan; Petaling Jaya Selangor Darul Ehsan Malaysia
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9
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Abu Ghalia M, Dahman Y. Radiation crosslinking polymerization of poly (vinyl alcohol) and poly (ethylene glycol) with controlled drug release. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0861-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Oz UC, Devrim B, Bozkır A, Canefe K. Development of reconstitutable suspensions containing diclofenac sodium-loaded microspheres for pediatric delivery. J Microencapsul 2015; 32:317-28. [DOI: 10.3109/02652048.2015.1017616] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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11
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Fernandes AC, Pinto ML, Antunes F, Pires J. l-Histidine-based organoclays for the storage and release of therapeutic nitric oxide. J Mater Chem B 2015; 3:3556-3563. [PMID: 32262240 DOI: 10.1039/c4tb01913j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite its toxicity, in low concentrations, nitric oxide (NO) is a small endogenous molecule with a particularly important role in the regulation of several biochemical pathways of the human body. The potential of l-histidine-modified clays (organoclays) for storage and therapeutic release of nitric oxide was assessed. Materials were characterized by powder X-ray diffraction, TG-DSC, IR spectroscopy, and nitrogen adsorption at -196 °C. The NO storage and release kinetics was studied both in the gas and liquid phases. For some materials, improvement was observed for both the released amounts and the release profile for the organoclays in relation to the respective raw clays. Assays with HeLa cells indicated that the materials have low cytotoxicity.
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Affiliation(s)
- Ana C Fernandes
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
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12
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Application of liposomes in treatment of rheumatoid arthritis: quo vadis. ScientificWorldJournal 2014; 2014:978351. [PMID: 24688450 PMCID: PMC3932268 DOI: 10.1155/2014/978351] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 11/12/2013] [Indexed: 11/26/2022] Open
Abstract
The most common treatments for rheumatoid arthritis include nonsteroidal anti-inflammatory drugs (NSAIDs), corticosteroids, disease modifying antirheumatic drugs (DMARDs), and some biological agents. However, none of the treatments available is able to achieve the ultimate goal of treatment, that is, drug-free remission. This limitation has shifted the focus of treatment to delivery strategies with an ability to deliver the drugs into the synovial cavity in the proper dosage while mitigating side effects to other tissues. A number of approaches like microemulsions, microspheres, liposomes, microballoons, cocrystals, nanoemulsions, dendrimers, microsponges, and so forth, have been used for intrasynovial delivery of these drugs. Amongst these, liposomes have proven to be very effective for retaining the drug in the synovial cavity by virtue of their size and chemical composition. The fast clearance of intra-synovially administered drugs can be overcome by use of liposomes leading to increased uptake of drugs by the target synovial cells, which in turn reduces the exposure of nontarget sites and eliminates most of the undesirable effects associated with therapy. This review focuses on the use of liposomes in treatment of rheumatoid arthritis and summarizes data relating to the liposome formulations of various drugs. It also discusses emerging trends of this promising technology.
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13
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Giri TK, Kumar K, Alexander A, Ajazuddin, Badwaik H, Tripathi DK. A novel and alternative approach to controlled release drug delivery system based on solid dispersion technique. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.bfopcu.2012.07.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Parodi B, Russo E, Caviglioli G, Baldassari S, Gaglianone N, Schito AM, Cafaggi S. A chitosan lactate/poloxamer 407-based matrix containing Eudragit RS microparticles for vaginal delivery of econazole: design and in vitro evaluation. Drug Dev Ind Pharm 2012; 39:1911-20. [PMID: 22681543 DOI: 10.3109/03639045.2012.694589] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A matrix based on chitosan lactate and poloxamer 407 was evaluated as a delivery system for the vaginal administration of the antifungal drug econazole. The matrix was investigated both containing the pure drug and after introducing microparticles of Eudragit RS 100 containing econazole. Eudragit RS 100 microparticles were prepared using an emulsion-extraction method and dispersed in a solution containing chitosan lactate (2% w/w) and poloxamer 407 (1.7% w/w). The microparticles, obtained with a yield of 64% w/w and an encapsulation efficiency of 42% w/w, had a diameter of less than 2 μm and a drug loading of 13% w/w. The compressed matrices, characterized by DSC, swelling, erosion, release and mucoadhesion studies, had behaviours dependent on the relative amounts of the contained microparticles. The matrix without microparticles (MECN) showed zero-order release kinetics, with a maximum drug-release of 60% w/w, while those containing 50 or 75% w/w microparticles showed a diffusion controlled release up to 8 and 16 h, respectively, and a linear trend after those time intervals, caused by the erosion process, which allowed reaching a drug-release of approximately 100% w/w at 22 h. In in vitro experiments, the matrices were mucoadhesive and active in inhibiting the growth of Candida albicans 796.
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Affiliation(s)
- Brunella Parodi
- Dipartimento di Chimica e Tecnologie Farmaceutiche ed Alimentari , Genoa , Italy
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15
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Cetin EO, Gundogdu E, Baspinar Y, Karasulu E, Kirilmaz L. Novel application of Eudragit RL and cholesteryl oleyl carbonate to thermo-sensitive drug delivery system. Drug Dev Ind Pharm 2012; 39:1881-6. [PMID: 22397637 DOI: 10.3109/03639045.2012.662504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The Eudragit RL 100 and propylene glycol (PG) membranes with and without cholesteryl oleyl carbonate (COC) were prepared by the solvent casting method to pioneer a novel application of a thermo-sensitive drug delivery system. After that, the properties of these membranes were investigated by thermal, scanning, and porosity studies. Drug permeation studies through all membranes were carried out using salbuthamol sulphate (SBS) at constant temperatures (25°C and 37°C), respectively. The permeability of SBS through the membranes with COC has been shown to be a discontinuous function of temperature, that is, their permeability increased steeply above the phase transition temperature (37°C) of the COC. The thermo-sensitive permeation mechanism for the membranes might be based on the structure change of the membranes caused by the phase transition, so that the membranes could absorb more water. Considering the high biological safety of Eudragit RL 100 and PG membranes with and without COC might be used to develop a novel thermo-sensitive drug delivery system.
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Affiliation(s)
- Emel Oyku Cetin
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University , Izmir , Turkey
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16
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Lin SY, Kawashima Y. Current status and approaches to developing press-coated chronodelivery drug systems. J Control Release 2012; 157:331-53. [DOI: 10.1016/j.jconrel.2011.09.065] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 08/07/2011] [Indexed: 10/17/2022]
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17
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Maestrelli F, Cirri M, Mennini N, Bragagni M, Zerrouk N, Mura P. Influence of cross-linking agent type and chitosan content on the performance of pectinate-chitosan beads aimed for colon-specific drug delivery. Drug Dev Ind Pharm 2011; 38:1142-51. [DOI: 10.3109/03639045.2011.641566] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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18
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Bajerová M, Krejčová K, Rabišková M, Muselík J, Dvořáčková K, Gajdziok J, Masteiková R. Oxycellulose beads with drug exhibiting pH-dependent solubility. AAPS PharmSciTech 2011; 12:1348-57. [PMID: 22005954 DOI: 10.1208/s12249-011-9696-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 09/12/2011] [Indexed: 02/04/2023] Open
Abstract
The aim of this study was to develop novel hydrogel-based beads and characterize their potential to deliver and release a drug exhibiting pH-dependent solubility into distal parts of gastrointestinal (GI) tract. Oxycellulose beads containing diclofenac sodium as a model drug were prepared by the ionotropic external gelation technique using calcium chloride solution as the cross-linking medium. Resulting beads were characterized in terms of particle shape and size, encapsulation efficacy, swelling ability and in vitro drug release. Also, potential drug-polymer interactions were evaluated using Fourier transform infrared spectroscopy. The particle size was found to be 0.92-0.96 mm for inactive (oxycellulose only) and 1.47-1.60 mm for active (oxycellulose-diclofenac sodium) beads, respectively. In all cases, the sphericity factor was between 0.70 and 0.81 with higher values observed for samples containing higher polymer and drug concentrations. The swelling of inactive beads was found to be strongly influenced by the pH and composition (i.e. Na(+) concentration) of the selected media (simulated gastric fluid vs. phosphate buffer pH 6.8). The encapsulation efficiency of the prepared particles ranged from 58% to 65%. Results of dissolution tests showed that the drug loading inside of the particles influenced the rate of its release. In general, prepared particles were able to release the drug within 12-16 h after a lag time of 4 h. Fickian diffusion was found as the predominant drug release mechanism. Thus, this novel particulate system showed a good potential to deliver drugs specifically to the distal parts of the human GI tract.
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Formulation optimization of sustained-release ammonio methacrylate copolymer microspheres. Effects of log p and concentration of polar cosolvents, and role of the drug/copolymer ratio. Pharmaceutics 2011; 3:830-47. [PMID: 24309310 PMCID: PMC3857060 DOI: 10.3390/pharmaceutics3040830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 10/11/2011] [Accepted: 10/27/2011] [Indexed: 11/16/2022] Open
Abstract
The objectives of this work were the formulation optimization of the preparation process parameters and to evaluate spray-dried sustained-release microspheres using ammonio methacrylate copolymer (AMC) as a polymer matrix. The effects of log P and the concentrations of the cosolvents (acetone, methyl ethyl ketone and n-butyl acetate) and different drug/copolymer ratios as independent variables on the physicochemical parameters (the W1/O emulsion viscosity, the microsphere production yield, the average particle size, the encapsulation efficiency) and the cumulative in vitro drug release as dependent variables were studied. The optimization was carried out on the basis of the 33 factorial design study. The optimization process results showed that addition of polar cosolvents proved effective, linear relationships were observed between the independent and the dependent variables. The best conditions were achieved by microspheres prepared by using a low/medium cosolvent log P, cosolvent concentration of 25-50% v/v and a drug/copolymer ratio of 1:16. The microspheres ensured sustained release with Nernst and Baker-Lonsdale release profiles.
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Aher KB, Bhavar GB, Joshi HP, Chaudhari SR. WITHDRAWN: Recent advances in compression-coated tablets as a controlled drug delivery system. Saudi Pharm J 2011. [DOI: 10.1016/j.jsps.2011.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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21
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Maderuelo C, Zarzuelo A, Lanao JM. Critical factors in the release of drugs from sustained release hydrophilic matrices. J Control Release 2011; 154:2-19. [DOI: 10.1016/j.jconrel.2011.04.002] [Citation(s) in RCA: 337] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 03/29/2011] [Indexed: 11/30/2022]
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22
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Dabhi C, Randale S, Belgamwar V, Gattani S, Tekade A. Predictable pulsatile release of tramadol hydrochloride for chronotherapeutics of arthritis. Drug Deliv 2010; 17:273-81. [PMID: 20524906 DOI: 10.3109/10717541003706240] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The present investigation deals with the development of a pH and time-dependent press-coated pulsatile drug delivery system for delivering drugs into the colon. The system consists of a drug containing core, coated by a combination of natural polymer Delonix regia gum (DRG) and hydroxypropyl methylcellulose (HPMC K4M) in various proportions, which controls the onset of release. The whole system was coated with methacrylic acid copolymers, which not only prevents the drug release in the stomach, but also prolongs the lag time. Tramadol HCl was used as a model drug and varying combinations of DRG and HPMC K4M were used to achieve the desired lag time before rapid and complete release of the drug in the colon. It was observed that the lag time depends on the coating ratio of DRG to HPMC and also on press coating weight. Drug release was found to be increased by 15-30% in the presence of colonic microbial flora. The results showed the capability of the system in achieving pulsatile release for a programmable period of time and pH-dependent release to attain colon-targeted delivery.
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Affiliation(s)
- Chandu Dabhi
- Department of Pharmaceutics, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur 425405, District Dhule (M.S.), India
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Kshirsagar SJ, Bhalekar MR, Umap RR. Design, development and in vitro-in vivo study of a colon-specific fast disintegrating tablet. Pharm Dev Technol 2010; 16:449-56. [DOI: 10.3109/10837450.2010.485319] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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24
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Lamas MC, Leonardi D, Lambri OA, Bassani G, Barrera MG, Bolmaro RE, Salomon CJ. Preparation, characterization and dissolution studies of fast release diclofenac sodium tablets from PVP solid dispersions. Pharm Dev Technol 2010. [DOI: 10.3109/10837450903085400] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Rane AB, Gattani SG, Kadam VD, Tekade AR. Formulation and evaluation of press coated tablets for pulsatile drug delivery using hydrophilic and hydrophobic polymers. Chem Pharm Bull (Tokyo) 2009; 57:1213-7. [PMID: 19881269 DOI: 10.1248/cpb.57.1213] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The aim of present investigation was to develop press coated tablet for pulsatile drug delivery of ketoprofen using hydrophilic and hydrophobic polymers. The drug delivery system was designed to deliver the drug at such a time when it could be most needful to patient of rheumatoid arthritis. The press coated tablets containing ketoprofen in the inner core was formulated with an outer shell by different weight ratio of hydrophobic polymer (micronized ethyl cellulose powder) and hydrophilic polymers (glycinemax husk or sodium alginate). The release profile of press coated tablet exhibited a lag time followed by burst release, in which outer shell ruptured into two halves. Authors also investigated factors influencing on lag time such as particle size and viscosity of ethyl cellulose, outer coating weight and paddle rpm. The surface morphology of the tablet was examined by a scanning electron microscopy. Differential scanning calorimeter and Fourier transformed infrared spectroscopy study showed compatibility between ketoprofen and coating material.
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Affiliation(s)
- Ashish Babulal Rane
- Department of Pharmaceutics and Quality Assurance, R. C. Patel Institute of Pharmaceutical Education & Research, Shirpur 425 405, Maharashtra, India
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An assessment of the interactions between diclofenac sodium and ammonio methacrylate copolymer using thermal analysis and Raman spectroscopy. J Pharm Biomed Anal 2008; 46:288-94. [DOI: 10.1016/j.jpba.2007.10.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 10/04/2007] [Accepted: 10/06/2007] [Indexed: 11/18/2022]
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Koseki T, Onishi H, Takahashi Y, Uchida M, Machida Y. Development of Novel Fast-Disintegrating Tablets by Direct Compression Using Sucrose Stearic Acid Ester as a Disintegration-Accelerating Agent. Chem Pharm Bull (Tokyo) 2008; 56:1384-8. [DOI: 10.1248/cpb.56.1384] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Takuma Koseki
- Department of Drug Delivery Research, Hoshi University
| | - Hiraku Onishi
- Department of Drug Delivery Research, Hoshi University
| | | | - Minoru Uchida
- Market Development Department, Mitsubishi-kagaku Foods Corporation
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28
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Shekunov BY, Chattopadhyay P, Tong HHY, Chow AHL. Particle size analysis in pharmaceutics: principles, methods and applications. Pharm Res 2006; 24:203-27. [PMID: 17191094 DOI: 10.1007/s11095-006-9146-7] [Citation(s) in RCA: 258] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2006] [Accepted: 08/07/2006] [Indexed: 11/28/2022]
Abstract
Physicochemical and biopharmaceutical properties of drug substances and dosage forms can be highly affected by the particle size, a critical process parameter in pharmaceutical production. The fundamental issue with particle size analysis is the variety of equivalent particle diameters generated by different methods, which is largely ascribable to the particle shape and particle dispersion mechanism involved. Thus, to enable selection of the most appropriate or optimal sizing technique, cross-correlation between different techniques may be required. This review offers an in-depth discussion on particle size analysis pertaining to specific pharmaceutical applications and regulatory aspects, fundamental principles and terminology, instrumentation types, data presentation and interpretation, in-line and process analytical technology. For illustration purposes, special consideration is given to the analysis of aerosols using time-of-flight and cascade impactor measurements, which is supported by a computational analysis conducted for this review.
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Affiliation(s)
- Boris Y Shekunov
- Ferro Pfanstiehl Laboratories, Pharmaceutical Technologies, Independence, Ohio 44131, USA.
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29
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Gazzaniga A, Maroni A, Sangalli ME, Zema L. Time-controlled oral delivery systems for colon targeting. Expert Opin Drug Deliv 2006; 3:583-97. [PMID: 16948555 DOI: 10.1517/17425247.3.5.583] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In recent years, many research efforts have been spent in the achievement of selective delivery of drugs into the colon following oral administration. Indeed, colonic release is regarded as a beneficial approach to the pharmacological treatment or prevention of widespread large bowel pathologies, such as inflammatory bowel disease and adenocarcinoma. In addition, it is extensively explored as a potential means of enhancing the oral bioavailability of peptides, proteins and other biotechnological molecules, which are known to be less prone to enzymatic degradation in the large, rather than in the small, intestine. Based on these premises, several formulation strategies have been attempted in pursuit of colonic release, chiefly including microflora-, pH-, pressure- and time-dependent delivery technologies. In particular, this review is focused on the main design features and release performances of time-controlled devices, which rely on the relative constancy that is observed in the small intestinal transit time of dosage forms.
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Affiliation(s)
- Andrea Gazzaniga
- Istituto di Chimica Farmaceutica e Tossicologica P. Pratesi, Università di Milano, V.le Abruzzi 42, 20131 Milan, Italy.
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30
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Gonçalves VL, Laranjeira MCM, Fávere VT, Pedrosa RC. Effect of crosslinking agents on chitosan microspheres in controlled release of diclofenac sodium. POLIMEROS 2005. [DOI: 10.1590/s0104-14282005000100005] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Fujimori J, Yoshihashi Y, Yonemochi E, Terada K. Application of Eudragit RS to thermo-sensitive drug delivery systems. J Control Release 2005; 102:49-57. [PMID: 15653133 DOI: 10.1016/j.jconrel.2004.09.027] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2004] [Accepted: 09/17/2004] [Indexed: 11/18/2022]
Abstract
The Eudragit RS and polyethylene glycol 400 (PEG 400) blend polymer (EPG) membranes were prepared by the solvent casting method to pioneer a novel application of Eudragit RS to a thermo-sensitive material. The EPG membranes containing 2.5-10% PEG 400 (2.5-10% EPG) showed the glass transition temperatures (Tgs) around the body temperature (32-42 degrees C). Drug permeation studies through the EPG membranes were carried out using acetaminophen (AAP) and aminopyrine (AMP) as the model drugs. The permeability of AAP and AMP through the EPG membranes has been shown to be a discontinuous function of temperature, that is, their permeability increased steeply above the Tg of the membranes. The amount of AMP permeated at 42 degrees C was nearly eight times as much as that at 36 degrees C. Arrhenius plots of the steady-state permeability coefficient (P) of AAP indicated two straight lines that intersect at the Tg of the 10% EPG membrane. In the water uptake study for the 10% EPG membrane, the degree of the swelling for the membrane tended to increase with increasing temperature above the Tg of the membrane. The thermo-sensitive permeation mechanism for the EPG membranes might be based on the structure change of the membranes caused by the glass transition, so that the membranes could absorb more water. Considering the high biological safety of Eudragit RS and PEG 400, the EPG membranes might be used to develop a novel thermo-sensitive drug delivery system.
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Affiliation(s)
- Junya Fujimori
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
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Lin SY, Lin KH, Li MJ. Formulation design of double-layer in the outer shell of dry-coated tablet to modulate lag time and time-controlled dissolution function: studies on micronized ethylcellulose for dosage form design (VII). AAPS JOURNAL 2004; 6:e17. [PMID: 15760102 PMCID: PMC2751242 DOI: 10.1208/aapsj060317] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dry-coated tablet with optimal lag time was designed to simulate the dosing time of drug administration according to the physiological needs. Different compositions of ethylcellulose (EC) powder with a coarse particle (167.5 microm) and several fine particles (< 6 microm), respectively, were mixed to formulate the whole layer of the outer shell of dry-coated tablets. The formulations containing different weight ratios of coarse/fine particles of EC powders or 167.5 microm EC powder/excipient in the upper layer of the outer shell to influence the release behavior of sodium diclofenac from dry-coated tablet were also explored. The results indicate that sodium diclofenac released from all the dry-coated tablets exhibited an initial lag period, followed by a stage of rapid drug release. When the mixture of the coarse/fine particles of EC powders was incorporated into the whole layer, the lag time was almost the same. The outer shell broke into 2 halves to make a rapid drug release after the lag time, which belonged to the time-controlled disruption of release mechanism. When the lower layer in the outer shell was composed of 167.5 microm EC powder and the upper layer was formulated by mixing different weight ratios of 167.5 microm and 6 microm of EC powders, the drug release also exhibited a time-controlled disruption behavior. Its lag time might be freely modulated, depending on the amount of 6 microm EC powder added. Once different excipients were respectively incorporated into the upper layer of the outer shell, different release mechanisms were observed as follows: time-controlled explosion for Explotab, disruption for Avicel and spray-dried lactose, erosion for dibasic calcium phosphate anhydrate, and sigmoidal profile for hydroxypropyl methylcellulose.
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Affiliation(s)
- Shan-Yang Lin
- Biopharmaceutics Laboratory, Department of Medical Research & Education, Veterans General Hospital-Taipei, Taipei, Taiwan, Republic of China.
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