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Verma P, Rezaei L, Govindarajan R, Greig NH, Donovan MD. Gastroretentive Delivery Approach to Address pH-Dependent Degradation of (+)- and (-)-Phenserine. AAPS PharmSciTech 2024; 25:198. [PMID: 39192157 DOI: 10.1208/s12249-024-02903-w] [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: 05/16/2024] [Accepted: 07/26/2024] [Indexed: 08/29/2024] Open
Abstract
(-)-Phenserine ("phenserine") and (+)-phenserine (posiphen; buntanetap) are longer-acting enantiomeric analogs of physostigmine with demonstrated promise in the treatment of Alzheimer's and Parkinson's diseases. Both enantiomers have short plasma half-lives, and their pharmacokinetics might be improved through the use of either once or twice-daily administration of an extended-release dosage form. Phenserine was observed to form a colored degradation product in near-neutral and alkaline pH environments, and at pH 7, the half-life of posiphen was determined to be ~ 9 h (40 °C). To limit luminal degradation which would reduce bioavailability, a gastroretentive tablet composed of a polyethylene oxide-xanthan gum matrix was developed. When placed in simulated gastric fluid (pH 1.2), approximately 70% of the phenserine was released over a 12 h period, and no degradants were detected in the release medium. In comparison, a traditional hydrophilic-matrix, extended-release tablet showed measurable amounts of phenserine degradation in a pH 7.2 medium over an 8 h release interval. These results confirm that a gastroretentive tablet can reduce the luminal degradation of phenserine or posiphen by limiting exposure to neutral pH conditions while providing sustained release of the drug over at least 12 h. Additional advantages of the gastroretentive tablet include reduced gastric and intestinal concentrations of the drug resulting from the slower release from the gastroretentive tablet which may also limit the occurrence of the dose-limiting GI side effects previously observed with immediate-release phenserine capsules.
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Affiliation(s)
- Pratishtha Verma
- Department of Pharmaceutical Sciences and Experimental Therapeutics, University of Iowa, Iowa City, Iowa, 52242, USA
| | - Leyla Rezaei
- Department of Pharmaceutical Sciences and Experimental Therapeutics, University of Iowa, Iowa City, Iowa, 52242, USA
| | - Ramprakash Govindarajan
- Department of Pharmaceutical Sciences and Experimental Therapeutics, University of Iowa, Iowa City, Iowa, 52242, USA
| | - Nigel H Greig
- Translational Gerontology Branch, National Institute On Aging, Intramural Research Program, National Institutes of Health, Baltimore, Maryland, 21224, USA
| | - Maureen D Donovan
- Department of Pharmaceutical Sciences and Experimental Therapeutics, University of Iowa, Iowa City, Iowa, 52242, USA.
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2
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Zheng K, Zhao J, Wang Q, Zhao Y, Yang H, Yang X, He L. Design and Evaluation of Ginkgolides Gastric Floating Controlled Release Tablets Based on Solid Supersaturated Self-nanoemulsifying. AAPS PharmSciTech 2023; 25:7. [PMID: 38147267 DOI: 10.1208/s12249-023-02717-2] [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: 09/11/2023] [Accepted: 11/30/2023] [Indexed: 12/27/2023] Open
Abstract
Ginkgolides are receptor antagonist of platelet activating factor with great clinical prospect, but its application is limited by its low solubility, short half-life and poor alkaline environment stability. It is difficult to solve these problems with a single drug delivery system. In this study, supersaturated self-nanoemulsifying gastric floating tablets of ginkgolides were developed through the combination of solid supersaturated self-nanoemulsifying drug delivery system (solid S-SNEDDS) and gastric retentive floating drug delivery system (GFDDS) to solve these problems of ginkgolides. Solid S-SNEDDS was prepared by D-optimal mixture design, normalization method and single factor experiment. The properties of solid-S-SNEDDS were studied by TEM, PXRD, FT-IR, SEM and in vitro drug release profile. Then, the optimal formulation of stomach floating tablet was obtained through single factor experiment and center composite design, followed by the study of in vitro release, model and mechanism of release, in vitro buoyancy and kinetics of erosion and swelling. PXRD and FT-IR showed that the drug in solid S-SNEDDS existed in an amorphous manner and formed hydrogen bond with excipients. The results showed that the cumulative release of GA and GB in the optimal tablets was 96.12% and 92.57% higher than the simple tablets within 12 h. The release mechanism of the tablet was skeleton erosion and drug diffusion. In 12 h, the optimal tablets can float stably in vitro and release the drug at a constant rate, with a cumulative release of more than 80%. In summary, the combination of SNEDDS and GFDDS is a promising means to solve the problems of ginkgolides.
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Affiliation(s)
- Kai Zheng
- Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, 110016, China
| | - Jing Zhao
- Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, 110016, China
| | - Qiuli Wang
- Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, 110016, China
| | - Yuyang Zhao
- Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, 110016, China
| | - Husheng Yang
- Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, 110016, China
| | - Xinggang Yang
- Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, 110016, China.
| | - Lian He
- Cancer Hospital of China Medical University, No. 44 Xiaoheyan Road, Shenyang, 110042, China.
- Liaoning Cancer Hospital & Institute, No. 44 Xiaoheyan Road, Shenyang, 110042, China.
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Samaro A, Vergaelen M, Purino M, Tigrine A, de la Rosa VR, Goudarzi NM, Boone MN, Vanhoorne V, Hoogenboom R, Vervaet C. Poly(2-alkyl-2-oxazoline)s: A polymer platform to sustain the release from tablets with a high drug loading. Mater Today Bio 2022; 16:100414. [PMID: 36133793 PMCID: PMC9483731 DOI: 10.1016/j.mtbio.2022.100414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 08/24/2022] [Accepted: 08/28/2022] [Indexed: 11/25/2022] Open
Abstract
Sustaining the release of highly dosed APIs from a matrix tablet is challenging. To address this challenge, this study evaluated the performance of thermoplastic poly (2-alkyl-2-oxazoline)s (PAOx) as matrix excipient to produce sustained-release tablets via three processing routes: (a) hot-melt extrusion (HME) combined with injection molding (IM), (b) HME combined with milling and compression and (c) direct compression (DC). Different PAOx (co-)polymers and polymer mixtures were processed with several active pharmaceutical ingredients having different aqueous solubilities and melting temperatures (metoprolol tartrate (MPT), metformin hydrochloride (MTF) and theophylline anhydrous (THA)). Different PAOx grades were synthesized and purified by the Supramolecular Chemistry Group, and the effect of PAOx grade and processing technique on the in vitro release kinetics was evaluated. Using the hydrophobic poly (2-n-propyl-2-oxazoline) (PnPrOx) as a matrix excipient allowed to sustain the release of different APIs, even at a 70% (w/w) drug load. Whereas complete THA release was not achieved from the PnPrOx matrix over 24 h regardless of the processing technique, adding 7.5% w/w of the hydrophilic poly (2-ethyl-2-oxazoline) to the hydrophobic PnPrOx matrix significantly increased THA release, highlighting the relevance of mixing different PAOx grades. In addition, it was demonstrated that the release of THA was similar from co-polymer and polymer mixtures with the same polymer ratios. On the other hand, as the release of MTF from a PnPrOx matrix was fast, the more hydrophobic poly (2-sec-butyl-2-oxazoline) (PsecBuOx) was used to retard MTF release. In addition, a mixture between the hydrophilic PEtOx and the hydrophobic PsecBuOx allowed accurate tuning of the release of MTF formulations. Finally, it was demonstrated that PAOx also showed a high ability to tune the in vivo release. IM tablets containing 70% MTF and 30% PsecBuOx showed a lower in vivo bioavailability compared to IM tablets containing a low PEtOx concentration (7.5%, w/w) in combination with PsecBuOx (22.5%, w/w). Importantly, the in vivo MTF blood level from the sustained release tablets correlated well with the in vitro release profiles. In general, this work demonstrates that PAOx polymers offer a versatile formulation platform to adjust the release rate of different APIs, enabling sustained release from tablets with up to 70% w/w drug loading.
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Affiliation(s)
- Aseel Samaro
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg, 460 9000, Ghent, Belgium
| | - Maarten Vergaelen
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Martin Purino
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Ali Tigrine
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Victor R de la Rosa
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium.,Avroxa BV., Technologiepark-Zwijnaarde, Ghent, Belgium
| | - Niloofar Moazami Goudarzi
- Radiation Physics Research Group, Department of Physics and Astronomy, Ghent University, Belgium.,Center for X-ray Tomography (UGCT), Ghent University, Ghent, Belgium
| | - Matthieu N Boone
- Radiation Physics Research Group, Department of Physics and Astronomy, Ghent University, Belgium.,Center for X-ray Tomography (UGCT), Ghent University, Ghent, Belgium
| | - Valérie Vanhoorne
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg, 460 9000, Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg, 460 9000, Ghent, Belgium
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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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Lowinger MB, Maier EY, Williams RO, Zhang F. Hydrophilic Poly(urethanes) Are an Effective Tool for Gastric Retention Independent of Drug Release Rate. J Pharm Sci 2020; 109:1967-1977. [PMID: 32087181 DOI: 10.1016/j.xphs.2020.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/12/2019] [Accepted: 02/05/2020] [Indexed: 11/28/2022]
Abstract
Acyclovir is a poorly permeable, short half-life drug with poor colonic absorption, and current conventional controlled release formulations are unable to decrease the frequency of administration. We designed acyclovir dosage forms to be administered less frequently by being retained in the stomach and releasing drug over an extended duration. We developed a conventional modified-release matrix tablet to sustain the release of acyclovir and surrounded it with a hydrophilic poly(urethane) layer. When hydrated, the porous poly(urethane) swells to a size near or beyond that of the relaxed pylorus diameter and does not affect drug release rate. We demonstrated that the formulation is retained in the stomach for extended durations as it slowly releases drug, allowing for similar area under the curve but delayed tmax relative to a nongastroretentive control tablet. Unlike many other gastroretentive formulations, this dosage form design decouples drug release rate from gastric retention time, allowing them to be modulated independently. It also effectively retains in the stomach regardless of the prandial state, differentiating from other approaches. Our direct observation of excised rat stomachs allowed for a rigorous assessment of the impact of polymer swelling extent and the prandial state on both the dosage form integrity and retention time.
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Affiliation(s)
- Michael B Lowinger
- Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712; MRL, Merck & Co, Inc., 126 E. Lincoln Avenue, Rahway, New Jersey 07065
| | - Esther Y Maier
- Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712
| | - Robert O Williams
- Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712
| | - Feng Zhang
- Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712.
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Swellable and porous bilayer tablet for gastroretentive drug delivery: Preparation and in vitro-in vivo evaluation. Int J Pharm 2019; 572:118783. [DOI: 10.1016/j.ijpharm.2019.118783] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/23/2019] [Accepted: 10/10/2019] [Indexed: 11/20/2022]
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7
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Formulation and evaluation of gastric-floating controlled release tablets of Ginkgolides. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Simons FJ, Wagner KG. Modeling, design and manufacture of innovative floating gastroretentive drug delivery systems based on hot-melt extruded tubes. Eur J Pharm Biopharm 2019; 137:196-208. [PMID: 30826475 DOI: 10.1016/j.ejpb.2019.02.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/23/2019] [Accepted: 02/26/2019] [Indexed: 01/07/2023]
Abstract
The problem of many gastroretentive systems is the mechanistic connection of drug release and gastric retention control. This connection could be successfully separated by formulating hollow tubes via hot-melt extrusion and sealing both tube ends, which led to immediately floating devices. The tube wall consisted of metformin crystals embedded in an inert polymer matrix of Eudragit® RS PO and E PO. Very high drug loadings of up to 80% (w/w) were used without generating a 'burst release'. Sustained release profiles from four to more than twelve hours were achieved by varying the polymer proportions without affecting the floatability. Buoyancy was found to mainly depend on the cylinder design, i.e. the outer to inner diameter ratio. This allowed the polymer/metformin composition to be changed without affecting buoyancy, i.e. a separation of floatability and release control was achieved. A prediction model was implemented that allowed for the buoyancy force to be determined with high accuracy by selecting a suitable ratio of outer to inner diameter of the modular tube die. Wall thickness and mass normalized surface area were identified as geometric parameters that mainly influenced the release properties. Conclusively, this study offers a highly flexible and rational manufacturing approach for the development of gastroretentive floating drug delivery systems.
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Affiliation(s)
- Fabian J Simons
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Bonn, Germany
| | - Karl G Wagner
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Bonn, Germany.
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9
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Kim S, Hwang KM, Park YS, Nguyen TT, Park ES. Preparation and evaluation of non-effervescent gastroretentive tablets containing pregabalin for once-daily administration and dose proportional pharmacokinetics. Int J Pharm 2018; 550:160-169. [PMID: 30138708 DOI: 10.1016/j.ijpharm.2018.08.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/27/2018] [Accepted: 08/19/2018] [Indexed: 01/29/2023]
Abstract
The main purpose of this study was to develop gastroretentive tablets with floating and swelling properties for once-daily administration of pregabalin. The non-effervescent floating and swelling tablets were prepared using wet granulation and compaction, which are widely used and easily accessible. All formulations showed sustained release patterns and maintained buoyancy for over 24 h. The amount of hydroxypropyl methylcellulose and crospovidone were found to be critical factors affecting in vitro dissolution and floating properties of the prepared tablets. The optimized tablets containing 300 mg of pregabalin started to float within 3 min and swelled above 12.8 mm, the reported pyloric sphincter diameter during the fed state, in all dimensions including length, width, and thickness. In vivo results in beagle dogs indicated that the optimized formulations are suitable as once-daily dosage forms, and dose proportionality was observed in doses ranging from 75 to 300 mg. Additionally, the dogs administered with the formulation having poor in vitro gastroretentive properties showed highly variable and reduced extent of absorption, signifying the necessity of the gastroretentive drug delivery system. In conclusion, the developed non-effervescent floating tablets are promising candidates for once-daily delivery of pregabalin.
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Affiliation(s)
- Seongkyu Kim
- Yuhan Research Institute, Yuhan Corporation, Yongin 17084, Republic of Korea; School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyu-Mok Hwang
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yoong Sik Park
- Yuhan Research Institute, Yuhan Corporation, Yongin 17084, Republic of Korea
| | - Thi-Tram Nguyen
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Eun-Seok Park
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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Belhadji L, HadjSadok A, Moulai-Mostefa N. Design and characterization of calcium-free in-situ gel formulation based on sodium alginate and chitosan. Drug Dev Ind Pharm 2017; 44:662-669. [DOI: 10.1080/03639045.2017.1408640] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Linda Belhadji
- Laboratoire Analyse Fonctionnelle des Procédés Chimiques, Département de Génie des Procédés, Universite´ de Blida 1, Blida, Algeria
| | - Abdelkader HadjSadok
- Laboratoire Analyse Fonctionnelle des Procédés Chimiques, Département de Génie des Procédés, Universite´ de Blida 1, Blida, Algeria
| | - Nadji Moulai-Mostefa
- Laboratoire Analyse Fonctionnelle des Procédés Chimiques, Département de Génie des Procédés, Universite´ de Blida 1, Blida, Algeria
- Laboratoire Matériaux et Environnement, Faculté de Technologie, Université de Medea, Medea, Algeria
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Verstraete G, De Jaeghere W, Vercruysse J, Grymonpré W, Vanhoorne V, Stauffer F, De Beer T, Bezuijen A, Remon J, Vervaet C. The use of partially hydrolysed polyvinyl alcohol for the production of high drug-loaded sustained release pellets via extrusion-spheronisation and coating: In vitro and in vivo evaluation. Int J Pharm 2017; 517:88-95. [DOI: 10.1016/j.ijpharm.2016.11.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/29/2016] [Accepted: 11/30/2016] [Indexed: 10/20/2022]
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12
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A comparative study between melt granulation/compression and hot melt extrusion/injection molding for the manufacturing of oral sustained release thermoplastic polyurethane matrices. Int J Pharm 2016; 513:602-611. [DOI: 10.1016/j.ijpharm.2016.09.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/23/2016] [Accepted: 09/24/2016] [Indexed: 02/01/2023]
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13
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Mandal UK, Chatterjee B, Senjoti FG. Gastro-retentive drug delivery systems and their in vivo success: A recent update. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2016.04.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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HPMC-based gastroretentive dual working matrices coated with Ca +2 ion crosslinked alginate-fenugreek gum gel membrane. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:170-181. [DOI: 10.1016/j.msec.2016.05.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 04/11/2016] [Accepted: 05/03/2016] [Indexed: 11/18/2022]
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Recent progresses in bioadhesive microspheres via transmucosal administration. Colloids Surf B Biointerfaces 2015; 140:361-372. [PMID: 26774569 DOI: 10.1016/j.colsurfb.2015.12.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 12/05/2015] [Accepted: 12/26/2015] [Indexed: 01/04/2023]
Abstract
Based on the advantages of adhesion preparations and the application status of microspheres (MSs) in mucous delivery, this paper primarily reviews the bioadhesive MSs via transmucosal administration routes, including the mucosa in alimentary tract and other lumens. Particularly, the detailed researches about of celladhesive MSs and some new-style bioadhesive MSs are mentioned. Furthermore, this review attempts to reveal the advances of bioadhesive MSs as cell-selective bioadhesion systems and the stimuli-responsive MSs as location-specific drug delivery systems. Although these MSs show powerful strength, some far-sighted ideas should be brought on agendas. In the future, mechanisms should be put under tight scrutiny and more attention should be focused on the excellent bioadhesive materials and the 'second generation mucoadhesives'. Meaningful clinical applications of these novel MSs are also of current concerns and need more detailed researches.
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Walsh PL, Bothe JR, Bhardwaj S, Hu M, Nofsinger R, Xia B, Persak S, Pennington J, Bak A. A canine biorelevant dissolution method for predicting in vivo performance of orally administered sustained release matrix tablets. Drug Dev Ind Pharm 2015; 42:836-44. [DOI: 10.3109/03639045.2015.1082583] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Paul L. Walsh
- Department of Analytical Sciences, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Rahway, NJ, USA,
| | - Jameson R. Bothe
- Department of Analytical Sciences, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Rahway, NJ, USA,
| | - Sunny Bhardwaj
- Department of Discovery Pharmaceutical Sciences, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Kenilworth, NJ, USA,
| | - Mengwei Hu
- Department of Discovery Pharmaceutical Sciences, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Kenilworth, NJ, USA,
| | - Rebecca Nofsinger
- Department of Biopharmaceutics, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, West Point, PA, USA, and
| | - Binfeng Xia
- Department of Biopharmaceutics, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, West Point, PA, USA, and
| | - Steven Persak
- Department of Device Development, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Rahway, NJ, USA
| | - Justin Pennington
- Department of Analytical Sciences, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Rahway, NJ, USA,
| | - Annette Bak
- Department of Discovery Pharmaceutical Sciences, Pharmaceutical Sciences & Clinical Supplies, Merck Research Laboratories, Kenilworth, NJ, USA,
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El-Zahaby SA, Kassem AA, El-Kamel AH. Formulation and in vitro evaluation of size expanding gastro-retentive systems of levofloxacin hemihydrate. Int J Pharm 2014; 464:10-8. [PMID: 24472642 DOI: 10.1016/j.ijpharm.2014.01.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 01/13/2014] [Accepted: 01/18/2014] [Indexed: 02/07/2023]
Abstract
Size increasing (plug-type) levofloxacin hemihydrate (LVF) tablets for eradication of Helicobacter pylori (H. pylori) were prepared using in situ gel forming polymers including: gellan gum, sodium alginate, pectin and xanthan gum. Effect of cross-linkers: calcium and aluminum chloride, on the drug release was also studied. The prepared tablets were evaluated for their physicochemical parameters: weight variation, thickness, friability, hardness, drug content, water uptake and in vitro drug release. The optimized formula was subjected to further studies such as radial swelling test, FT-IR and DSC. Results revealed that LVF release depends not only on the nature of the matrix but also on the type of cross linker used to form this polymeric matrix. The addition of either calcium chloride or aluminum chloride, as cross-linkers, to gellan gum formulations significantly decreased drug release. Other polymers' formulations resulted in increased drug release upon addition of the same cross-linkers. The formula containing xanthan gum without any cross linker showed the most sustained LVF release with an increase in diameter with time, thus acting as a plug-type dosage form. IR spectra and DSC thermograms of LVF, xanthan gum, and a physical mixture of both, indicated that there was no interaction between the drug and the polymer and confirmed the drug stability.
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Affiliation(s)
- Sally A El-Zahaby
- Department of Pharmaceutics, Faculty of Pharmacy and Drug manufacturing, Pharos University in Alexandria, Alexandria, Egypt.
| | - Abeer A Kassem
- Department of Pharmaceutics, Faculty of Pharmacy and Drug manufacturing, Pharos University in Alexandria, Alexandria, Egypt
| | - Amal H El-Kamel
- Department of Pharmaceutics, Faculty of Pharmacy, University of Alexandria, Alexandria, Egypt
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18
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El-Zahaby SA, Kassem AA, El-Kamel AH. Formulation and in vitro evaluation of size expanding gastro-retentive systems of levofloxacin hemihydrate. Int J Pharm 2014. [DOI: https://doi.org/10.1016/j.ijpharm.2014.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Foster KA, Sun H, Fancher RM, Proszynski M, Dixon G, Ford K, Cornelius G, Gudmundsson OS, Hageman MJ. Utility of gastric-retained alginate gels to modulate pharmacokinetic profiles in rats. J Pharm Sci 2013; 102:2440-9. [PMID: 23744594 DOI: 10.1002/jps.23630] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 04/25/2013] [Accepted: 05/14/2013] [Indexed: 11/10/2022]
Abstract
A gastric-retentive formulation amenable to dosing in rodents has the potential to enable sustained release in a preclinical setting. This may be useful to provide systemic exposure over a longer duration or to increase duration of exposure for compounds with targets localized in the gastrointestinal tract. Previous work has shown that a mixture of 1% sodium alginate and 0.625% karaya gum in the presence of a calcium chelator can form gels in situ that are gastric retained in rats. The aim of this work was to define the physicochemical boundaries of compounds within this technology and their relation to in vivo release using a series of model compounds with high permeability but varying solubility. In vitro data demonstrated a good correlation between solubility and initial release rates from the gels. In vivo studies were conducted in Sprague-Dawley rats to compare the exposure profile of compounds dosed in gel relative to a standard formulation. In vivo data were consistent with trends from the in vitro studies. These data suggest that, in conjunction with an understanding of compound solubility, sodium alginate/karaya gum gels may be a useful tool to modulate exposure profiles in rodent models in a preclinical setting.
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Affiliation(s)
- Kimberly A Foster
- Pharmaceutical Candidate Optimization, Bristol-Myers Squibb, Princeton, New Jersey 08543, USA.
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Foster KA, Morgen M, Murri B, Yates I, Fancher RM, Ehrmann J, Gudmundsson OS, Hageman MJ. Utility of in situ sodium alginate/karaya gum gels to facilitate gastric retention in rodents. Int J Pharm 2012; 434:406-12. [DOI: 10.1016/j.ijpharm.2012.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 05/24/2012] [Accepted: 06/03/2012] [Indexed: 10/28/2022]
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