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Vieira WT, Viegas JSR, da Silva MGC, de Oliveira Nascimento L, Vieira MGA, Sarmento B. Self-assembly mucoadhesive beads of κ-carrageenan/sericin for indomethacin oral extended release. Int J Biol Macromol 2024; 270:132062. [PMID: 38705340 DOI: 10.1016/j.ijbiomac.2024.132062] [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: 01/19/2024] [Revised: 04/27/2024] [Accepted: 05/01/2024] [Indexed: 05/07/2024]
Abstract
Oral drug administration, especially when composed of mucoadhesive delivery systems, has been a research trend due to increased residence time and contact with the mucosa, potentially increasing drug bioavailability and stability. In this context, this study aimed to develop self-assembly mucoadhesive beads composed of blends of κ-carrageenan and sericin (κ-Car/Ser) loaded with the anti-inflammatory drug indomethacin (IND). We investigated the swelling, adhesion behaviour, and mechanical/physical properties of the beads, assessing their effects on cell viability, safety and permeation characteristics in both 2D and triple-culture model. The swelling ratio of the beads indicated pH-responsiveness, with maximum water absorption at pH 6.8, and strong mucoadhesion, increasing primarily with higher polymer concentrations. The beads exhibited thermal stability and no chemical interaction with IND, showing improved mechanical properties. Furthermore, the beads remained stable during accelerated and long-term storage studies. The beads were found to be biocompatible, and IND encapsulation improved cell viability (>70 % in both models, 79 % in VN) and modified IND permeation through the models (6.3 % for F5 formulation (κ-Car 0.90 % w/v | Ser 1.2 % w/v| IND 3.0 g); 10.9 % for free IND, p < 0.05). Accordingly, κ-Car/Ser/IND beads were demonstrated to be a promising IND drug carrier to improve oral administration while mitigating the side effects of non-steroidal anti-inflammatories.
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Affiliation(s)
- Wedja Timóteo Vieira
- University of Campinas, School of Chemical Engineering, Av. Albert Einstein, 500, Cidade Universitária "Zeferino Vaz", Campinas, SP 13083-852, Brazil
| | - Juliana Santos Rosa Viegas
- i3S - Institute for Research & Innovation in Health, University of Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
| | - Meuris Gurgel Carlos da Silva
- University of Campinas, School of Chemical Engineering, Av. Albert Einstein, 500, Cidade Universitária "Zeferino Vaz", Campinas, SP 13083-852, Brazil
| | - Laura de Oliveira Nascimento
- University of Campinas, School of Pharmaceutical Sciences, Rua Cândido Portinari, 200, Cidade Universitária "Zeferino Vaz", Campinas, SP 13083-871, Brazil
| | - Melissa Gurgel Adeodato Vieira
- University of Campinas, School of Chemical Engineering, Av. Albert Einstein, 500, Cidade Universitária "Zeferino Vaz", Campinas, SP 13083-852, Brazil.
| | - Bruno Sarmento
- i3S - Institute for Research & Innovation in Health, University of Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; IUCS-CESPU, Rua Central de Gandra 1317, 4585-116 Gandra, Portugal
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2
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Kakimoto Y, Ikemura R, Imai Y, Tohnai N, Yamazaki S, Nakata E, Takashima H. Circularly polarised luminescence from excimer emission of anthracene derivatives complexed with γ-cyclodextrin in the solid state. RSC Adv 2023; 13:1914-1922. [PMID: 36712637 PMCID: PMC9832359 DOI: 10.1039/d2ra07971b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 01/04/2023] [Indexed: 01/12/2023] Open
Abstract
In this study, we report circularly polarised luminescence (CPL)-active molecules that exhibit high fluorescence quantum yields in the solid state. We developed anthracene derivatives with substituents at the 9 and 10 positions, such as ethyl(anthracene-9-carbonyl)glycinate (9AnGlyEt), N-butylanthracene-9-carboxamide (9AnB), N-benzylanthracene-9-carboxamide (9AnPh), and N 9,N 10-dibutylanthracene-9,10-dicarboxamide (9,10AnB). These compounds were complexed with γ-cyclodextrin (γ-CD) in the solid state by grinding, and the fluorescence properties of the resulting γ-CD complexes were investigated. The fluorescence quantum yields were enhanced after γ-CD complexation. Among the prepared γ-CD complexes, 9AnGlyEt/γ-CD had the highest fluorescence quantum yield (Φ f = 0.35), which was enhanced up to 5.8 times after γ-CD complexation. This was probably due to the interaction between the two anthracene molecules in the γ-CD cavity, which prevented fluorescence quenching caused by aggregation of the compounds. Positive CPL of g CPL = 1.3 × 10-3 was observed for 9AnGlyEt/γ-CD based on its excimer emission.
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Affiliation(s)
- Yuna Kakimoto
- Department of Chemistry, Biology and Environmental Science, Faculty of Science, Nara Women's UniversityNara 630-8506Japan
| | - Ryoya Ikemura
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai UniversityOsaka 577-8502Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai UniversityOsaka 577-8502Japan
| | - Norimitsu Tohnai
- Department of Applied Chemistry, Graduate School of Engineering, Osaka UniversityOsaka 565-0871Japan
| | - Shoko Yamazaki
- Department of Chemistry, Nara University of EducationNara 630-8528Japan
| | - Eiji Nakata
- Institute of Advanced Energy, Kyoto UniversityKyoto 611-0011Japan
| | - Hiroshi Takashima
- Department of Chemistry, Biology and Environmental Science, Faculty of Science, Nara Women's UniversityNara 630-8506Japan
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3
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Du Y, Su Y. 19F Solid-state NMR characterization of pharmaceutical solids. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2022; 120:101796. [PMID: 35688018 DOI: 10.1016/j.ssnmr.2022.101796] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
Solid-state NMR has been increasingly recognized as a high-resolution and versatile spectroscopic tool to characterize drug substances and products. However, the analysis of pharmaceutical materials is often carried out at natural isotopic abundance and a relatively low drug loading in multi-component systems and therefore suffers from challenges of low sensitivity. The fact that fluorinated therapeutics are well represented in pipeline drugs and commercial products offers an excellent opportunity to utilize fluorine as a molecular probe for pharmaceutical analysis. We aim to review recent advancements of 19F magic angle spinning NMR methods in modern drug research and development. Applications to polymorph screening at the micromolar level, structural elucidation, and investigation of molecular interactions at the Ångström to submicron resolution in drug delivery, stability, and quality will be discussed.
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Affiliation(s)
- Yong Du
- Analytical Research and Development, Merck & Co., Inc., Rahway, NJ, 07065, United States
| | - Yongchao Su
- Analytical Research and Development, Merck & Co., Inc., Rahway, NJ, 07065, United States; Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, IN, 47907, United States; Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX, 78712, United States; Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT, 06269, United States.
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4
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Porcino M, Li X, Gref R, Martineau-Corcos C. Solid-State NMR Spectroscopy: A Key Tool to Unravel the Supramolecular Structure of Drug Delivery Systems. Molecules 2021; 26:4142. [PMID: 34299416 PMCID: PMC8306949 DOI: 10.3390/molecules26144142] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/30/2021] [Accepted: 07/03/2021] [Indexed: 11/16/2022] Open
Abstract
In the past decades, nanosized drug delivery systems (DDS) have been extensively developed and studied as a promising way to improve the performance of a drug and reduce its undesirable side effects. DDSs are usually very complex supramolecular assemblies made of a core that contains the active substance(s) and ensures a controlled release, which is surrounded by a corona that stabilizes the particles and ensures the delivery to the targeted cells. To optimize the design of engineered DDSs, it is essential to gain a comprehensive understanding of these core-shell assemblies at the atomic level. In this review, we illustrate how solid-state nuclear magnetic resonance (ssNMR) spectroscopy has become an essential tool in DDS design.
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Affiliation(s)
- Marianna Porcino
- CEMHTI UPR CNRS 3079, Université d’Orléans, 45071 Orléans, France
| | - Xue Li
- Institut des Sciences Moléculaires d’Orsay, UMR CNRS 8214, Paris-Sud University, Université Paris Saclay, 91400 Orsay, France; (X.L.); (R.G.)
| | - Ruxandra Gref
- Institut des Sciences Moléculaires d’Orsay, UMR CNRS 8214, Paris-Sud University, Université Paris Saclay, 91400 Orsay, France; (X.L.); (R.G.)
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5
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Li X, Porcino M, Martineau-Corcos C, Guo T, Xiong T, Zhu W, Patriarche G, Péchoux C, Perronne B, Hassan A, Kümmerle R, Michelet A, Zehnacker-Rentien A, Zhang J, Gref R. Efficient incorporation and protection of lansoprazole in cyclodextrin metal-organic frameworks. Int J Pharm 2020; 585:119442. [PMID: 32445910 DOI: 10.1016/j.ijpharm.2020.119442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 01/01/2023]
Abstract
Lansoprazole (LPZ) is an acid pump inhibitor, which readily degrades upon acidic or basic conditions and under heating. We investigated here LPZ stability upon incorporation in particles made of cyclodextrin metal-organic frameworks (CD-MOFs). LPZ loaded CD-MOFs were successfully synthesized, reaching high LPZ payloads of 23.2 ± 2.1 wt%, which correspond to a molar ratio of 1:1 between LPZ and γ-CD. The homogeneity of LPZ loaded CD-MOFs in terms of component distribution was confirmed by elemental mapping by STEM-EDX. Both CTAB, the surfactant used in the CD-MOFs synthesis, and LPZ compete for their inclusion in the CD cavities. CTAB allowed obtaining regular cubic particles of around 5 µm with 15 wt% residual CTAB amounts. When LPZ was incorporated, the residual CTAB amount was less than 0.1 wt%, suggesting a higher affinity of LPZ for the CDs than CTAB. These findings were confirmed by molecular simulations. Vibrational circular dichroism studies confirmed the LPZ incorporation inside the CDs. Solid-state NMR showed that LPZ was located in the CDs and that it remained intact even after three years storage. Remarkably, the CD-MOFs matrix protected the drug upon thermal decomposition. This study highlights the interest of CD-MOFs for the incorporation and protection of LPZ.
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Affiliation(s)
- Xue Li
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Marianna Porcino
- Université d'Orléans, CEMHTI UPR CNRS 3079, F-45071 Orléans, France
| | - Charlotte Martineau-Corcos
- Université d'Orléans, CEMHTI UPR CNRS 3079, F-45071 Orléans, France; Université Paris Saclay, ILV UMR CNRS 8180, Université de Versailles St-Quentin en Yvelines, 78035 Versailles, France; Institut Universitaire de France (IUF), 75005 Paris, France
| | - Tao Guo
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 201210 Shanghai, China
| | - Ting Xiong
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, 330004 Nanchang, China
| | - Weifeng Zhu
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, 330004 Nanchang, China
| | - Gilles Patriarche
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, France
| | | | - Alia Hassan
- Bruker Biospin Corporation, 8117 Fällanden, Switzerland
| | | | | | - Anne Zehnacker-Rentien
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Jiwen Zhang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 201210 Shanghai, China; Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, 330004 Nanchang, China
| | - Ruxandra Gref
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France.
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6
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Marchetti A, Chen J, Pang Z, Li S, Ling D, Deng F, Kong X. Understanding Surface and Interfacial Chemistry in Functional Nanomaterials via Solid-State NMR. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1605895. [PMID: 28247966 DOI: 10.1002/adma.201605895] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/26/2016] [Indexed: 05/24/2023]
Abstract
Surface and interfacial chemistry is of fundamental importance in functional nanomaterials applied in catalysis, energy storage and conversion, medicine, and other nanotechnologies. It has been a perpetual challenge for the scientific community to get an accurate and comprehensive picture of the structures, dynamics, and interactions at interfaces. Here, some recent examples in the major disciplines of nanomaterials are selected (e.g., nanoporous materials, battery materials, nanocrystals and quantum dots, supramolecular assemblies, drug-delivery systems, ionomers, and graphite oxides) and it is shown how interfacial chemistry can be addressed through the perspective of solid-state NMR characterization techniques.
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Affiliation(s)
- Alessandro Marchetti
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Juner Chen
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhenfeng Pang
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Shenhui Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Daishun Ling
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, P. R. China
| | - Feng Deng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Xueqian Kong
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
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7
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Priotti J, Ferreira MJG, Lamas MC, Leonardi D, Salomon CJ, Nunes TG. First solid-state NMR spectroscopy evaluation of complexes of benznidazole with cyclodextrin derivatives. Carbohydr Polym 2015; 131:90-7. [DOI: 10.1016/j.carbpol.2015.05.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 05/07/2015] [Accepted: 05/22/2015] [Indexed: 11/29/2022]
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8
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Ferreira MJG, García A, Leonardi D, Salomon CJ, Lamas MC, Nunes TG. 13C and 15N solid-state NMR studies on albendazole and cyclodextrin albendazole complexes. Carbohydr Polym 2015; 123:130-5. [DOI: 10.1016/j.carbpol.2015.01.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/10/2015] [Accepted: 01/19/2015] [Indexed: 11/24/2022]
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9
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Rudrangi SRS, Bhomia R, Trivedi V, Vine GJ, Mitchell JC, Alexander BD, Wicks SR. Influence of the preparation method on the physicochemical properties of indomethacin and methyl-β-cyclodextrin complexes. Int J Pharm 2015; 479:381-90. [DOI: 10.1016/j.ijpharm.2015.01.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/06/2015] [Accepted: 01/07/2015] [Indexed: 10/24/2022]
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10
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Maity B, Chatterjee A, Ahmed SA, Seth D. Supramolecular interactions of nonsteroidal anti-inflammatory drug in nanochannels of molecular containers: a spectroscopic, thermogravimetric and microscopic investigation. Chemphyschem 2014; 15:3502-14. [PMID: 25146319 DOI: 10.1002/cphc.201402419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Indexed: 11/11/2022]
Abstract
Supramolecular host-guest complexation between the nonsteroidal anti-inflammatory drug indomethacin (IMC) and molecular containers were investigated. The weakly fluorescent drug molecule becomes highly fluorescent on complexation with different molecular containers, and time-resolved fluorescence emission spectroscopy reveals that the lifetime components of IMC significantly increase in the presence of molecular containers, compared with the lifetimes in neat water. The respective solid host-guest complexes were synthesised and characterised by Fourier transform infrared and (1) H nuclear magnetic resonance spectroscopic analysis. Microscopy techniques were used to analyse modifications of the surface morphology, owing to the formation of supramolecular complexes. The effect of the molecular container on the optical properties of IMC has also been investigated to determine the effect of nanochannels of different size and structure.
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Affiliation(s)
- Banibrata Maity
- Department of Chemistry, Indian Institute of Technology Patna, Patliputra Colony, Patna 800013, Bihar (India), Fax: 91-612-2277383
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11
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Skorupska E, Jeziorna A, Kazmierski S, Potrzebowski MJ. Recent progress in solid-state NMR studies of drugs confined within drug delivery systems. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2014; 57-58:2-16. [PMID: 24398051 DOI: 10.1016/j.ssnmr.2013.12.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 11/27/2013] [Accepted: 12/03/2013] [Indexed: 06/03/2023]
Abstract
Recent progress in the application of solid-state NMR (SS NMR) spectroscopy in structural studies of active pharmaceutical ingredients (APIs) embedded in different drug carriers is detailed. This article is divided into sections. The first part reports short characterization of the nanoparticles and microparticles that can be used as drug delivery systems (DDSs). The second part shows the applicability of SS NMR to study non-steroidal anti-inflammatory drugs (NSAIDs). In this section, problems related to API-DDS interactions, morphology, local molecular dynamics, nature of inter- or intramolecular connections, and pore filling are reviewed for different drug carriers (e.g. mesoporous silica nanoparticles (MSNs), cyclodextrins, polymeric matrices and others). The third and fourth sections detail the recent applications of SS NMR for searching for antibiotics and anticancer drugs confined in zeolites, MSNs, amorphous calcium phosphate and other carriers.
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Affiliation(s)
- Ewa Skorupska
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Agata Jeziorna
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Slawomir Kazmierski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Marek J Potrzebowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
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12
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Roy S, Mandal M, Pal C, Giri P, Kumar GS, Mukherjee J, Jaisankar P. Studies on aqueous solubility of 3,3′-diindolylmethane derivatives using cyclodextrin inclusion complexes. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.09.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Vogt FG, Strohmeier M. 2D solid-state NMR analysis of inclusion in drug-cyclodextrin complexes. Mol Pharm 2012; 9:3357-74. [PMID: 23009557 DOI: 10.1021/mp300416w] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The solubility of drug molecules can often be improved through preparation and delivery of cyclodextrin (CD) inclusion complexes. These drug-oligosaccharide complexes can be prepared in solution and converted to the solid state via methods such as lyophilization and spray-drying, or they can be prepared directly from solids by a variety of methods. The development of drug-CD complexes as solids allows for potential advantages in dosage form design, such as the preparation of layered formulations, and it also can yield improvements in chemical and physical stability. 2D solid-state NMR (SSNMR) methods provide a direct way to probe drug-CD interactions in solid complexes through dipolar interactions between nuclei within the drug and CD molecules. In this study, 2D heteronuclear and homonuclear correlation SSNMR experiments involving (1)H, (13)C, (19)F, and (31)P nuclei are used to demonstrate the inclusion of drug within the CD cavity in a variety of powder samples. To illustrate the general applicability of the SSNMR approach presented, examples are shown for the drugs diflunisal, adefovir dipivoxil, voriconazole, dexamethasone, and prednisolone in complexes with α-CD, β-CD, and sulfobutylether-substituted β-CD. The quantitative analysis of included and free drug fractions in a solid drug-CD complex using SSNMR is also demonstrated. On the basis of these results, general approaches to the characterization of these materials using SSNMR are proposed.
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Affiliation(s)
- Frederick G Vogt
- Product Development, GlaxoSmithKline plc, 709 Swedeland Road, King of Prussia, Pennsylvania 19406, United States.
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14
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Pham TN, Watson SA, Edwards AJ, Chavda M, Clawson JS, Strohmeier M, Vogt FG. Analysis of amorphous solid dispersions using 2D solid-state NMR and (1)H T(1) relaxation measurements. Mol Pharm 2010; 7:1667-91. [PMID: 20681586 DOI: 10.1021/mp100205g] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Solid-state NMR (SSNMR) can provide detailed structural information about amorphous solid dispersions of pharmaceutical small molecules. In this study, the ability of SSNMR experiments based on dipolar correlation, spin diffusion, and relaxation measurements to characterize the structure of solid dispersions is explored. Observation of spin diffusion effects using the 2D (1)H-(13)C cross-polarization heteronuclear correlation (CP-HETCOR) experiment is shown to be a useful probe of association between the amorphous drug and polymer that is capable of directly proving glass solution formation. Dispersions of acetaminophen and indomethacin in different polymers are examined using this approach, as well as (1)H double-quantum correlation experiments to probe additional structural features. (1)H-(19)F CP-HETCOR serves a similar role for fluorinated drug molecules such as diflunisal in dispersions, providing a rapid means to prove the formation of a glass solution. Phase separation is detected using (13)C, (19)F, and (23)Na-detected (1)H T(1) experiments in crystalline and amorphous solid dispersions that contain small domains. (1)H T(1) measurements of amorphous nanosuspensions of trehalose and dextran illustrate the ability of SSNMR to detect domain size effects in dispersions that are not glass solutions via spin diffusion effects. Two previously unreported amorphous solid dispersions involving up to three components and containing voriconazole and telithromycin are analyzed using these experiments to demonstrate the general applicability of the approach.
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Affiliation(s)
- Tran N Pham
- Chemical Development, GlaxoSmithKline plc, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, UK.
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15
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Guilbaud JB, Baker H, Clark BC, Meehan E, Khimyak YZ. Effect of Encapsulating Arginine Containing Molecules on PLGA: A Solid-State NMR Study. J Pharm Sci 2010; 99:2697-710. [DOI: 10.1002/jps.22019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Guilbaud JB, Clark BC, Meehan E, Hughes L, Saiani A, Khimyak YZ. Effect of Encapsulating a Pseudo-Decapeptide Containing Arginine on PLGA: A Solid-State NMR Study. J Pharm Sci 2010; 99:2681-96. [DOI: 10.1002/jps.22060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Adeli M, Zarnegar Z, Kabiri R. Amphiphilic star copolymers containing cyclodextrin core and their application as nanocarrier. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.03.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Guilbaud JB, Cummings L, Khimyak YZ. Encapsulation of Indomethacin in PVP: Solid-State NMR Studies. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/masy.200750506] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Carpentier L, Decressain R, Desprez S, Descamps M. Dynamics of the Amorphous and Crystalline α-, γ-Phases of Indomethacin. J Phys Chem B 2005; 110:457-64. [PMID: 16471556 DOI: 10.1021/jp053545u] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Crystallization processes in indomethacin can be observed below Tg leading to different forms depending on the thermal treatment: a rapid and deep quench below Tg leads to the metastable alpha-phase and a slow cooling close to Tg gives rise to the stable gamma-phase. To understand this atypical behavior, we have studied the molecular mobility of the amorphous and crystalline forms of indomethacin by dielectric relaxation and 1H NMR spectroscopy. Two relaxations were detected in the glassy state obtained from the deeply quenched liquid. One, also present in the gamma-phase, was attributed to local rotations. The other one, of very low amplitude, was attributed to the Johari-Goldstein relaxation. The results allowed to discuss the relationship between these two relaxation processes and the crystallization properties of amorphous indomethacin.
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Affiliation(s)
- L Carpentier
- Laboratoire de Dynamique et Structure des Matériaux Moléculaires, U.M.R. CNRS 8024, Bât. P5, Ust Lille, 59655 Villeneuve d'Ascq, France. laurent.carpentier@univ-lille1@fr
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Su YC, Chen WC, Chang FC. Preparation and characterization of polyseudorotaxanes based on adamantane-modified polybenzoxazines and β-cyclodextrin. POLYMER 2005. [DOI: 10.1016/j.polymer.2004.09.059] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Liu Y, Chen GS, Chen Y, Ding F, Chen J. Cyclodextrins as carriers for cinchona alkaloids: a pH-responsive selective binding system. Org Biomol Chem 2005; 3:2519-23. [PMID: 15999183 DOI: 10.1039/b506053b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of cyclodextrin-cinchona alkaloid inclusion complexes were prepared from beta-cyclodextrin, heptakis(2,6-di-O-methyl)-beta-cyclodextrin and heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin and four cinchona alkaloids in ca. 90% yields, and their inclusion complexation behavior was investigated at pH 7.2 and 1.5 by means of fluorescence, UV/Vis and 2D NMR spectroscopy. The results showed that the cinchona alkaloids can be efficiently encapsulated in the cyclodextrin cavity in an acidic environment and sufficiently released in a neutral environment, which makes these cyclodextrin derivatives the potential carriers for cinchona alkaloids. The binding ability and molecular selectivity of cyclodextrins toward cinchona alkaloids were discussed from the viewpoint of the size-fit concept and multiple recognition mechanism between host and guest.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, PR China.
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