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Lei X, Zhang G, Yang T, Wu Y, Peng Y, Wang T, Li D, Liu Q, Wang C, Zhang G. Preparation and In Vitro and In Vivo Evaluation of Rectal In Situ Gel of Meloxicam Hydroxypropyl-β-cyclodextrin Inclusion Complex. Molecules 2023; 28:molecules28104099. [PMID: 37241839 DOI: 10.3390/molecules28104099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/11/2023] [Accepted: 04/19/2023] [Indexed: 05/28/2023] Open
Abstract
Meloxicam (MLX) is one of the most effective NSAIDs, but its poor water solubility and low bioavailability limit its clinical application. In this study, we designed a thermosensitive in situ gel of the hydroxypropyl-β-cyclodextrin inclusion complex (MLX/HP-β-CD-ISG) for rectal delivery to improve bioavailability. The best method for preparing MLX/HP-β-CD was the saturated aqueous solution method. The optimal inclusion prescription was optimized using an orthogonal test, and the inclusion complex was evaluated via PXRD, SEM, FTIR and DSC. Then, MLX/HP-β-CD-ISG was characterized regarding the gel properties, release in vitro, and pharmacokinetics in vivo. The inclusion rate of the inclusion complex obtained via the optimal preparation process was 90.32 ± 3.81%. The above four detection methods show that MLX is completely embedded in the HP-β-CD cavity. The developed MLX/HP-β-CD-ISG formulation has a suitable gelation temperature of 33.40 ± 0.17 °C, a gelation time of 57.33 ± 5.13 s, pH of 7.12 ± 0.05, good gelling ability and meets the requirements of rectal preparations. More importantly, MLX/HP-β-CD-ISG significantly improved the absorption and bioavailability of MLX in rats, prolonging the rectal residence time without causing rectal irritation. This study suggests that the MLX/HP-β-CD-ISG can have a wide application prospect with superior therapeutic benefits.
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Affiliation(s)
- Xiaomeng Lei
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Guansheng Zhang
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
- Integrated Chinese and Western Medicine Institute for Children Health & Drug Innovation, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Tao Yang
- College of Chinese Medicine and Life Science, Jiangxi University of Chinese Medicine, Nanchang 330004, China
| | - Yuhuan Wu
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Ying Peng
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Tiantian Wang
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Dongxun Li
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Qian Liu
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
- Integrated Chinese and Western Medicine Institute for Children Health & Drug Innovation, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Canjian Wang
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Guosong Zhang
- National Engineering Research Center of Chinese Medicine Solid Preparation Manufacturing Technology, Jiangxi University of Chinese Medicine, Nanchang 330006, China
- Integrated Chinese and Western Medicine Institute for Children Health & Drug Innovation, Jiangxi University of Chinese Medicine, Nanchang 330006, China
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Asim MH, Ijaz M, Mahmood A, Knoll P, Jalil A, Arshad S, Bernkop-Schnürch A. Thiolated cyclodextrins: Mucoadhesive and permeation enhancing excipients for ocular drug delivery. Int J Pharm 2021; 599:120451. [PMID: 33675922 DOI: 10.1016/j.ijpharm.2021.120451] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/24/2021] [Accepted: 02/27/2021] [Indexed: 12/11/2022]
Abstract
Thiolated β-cyclodextrin (β-CD) has the potential to enhance mucoadhesive and permeation enhancing properties on ocular mucosa. Thiolated β-CD was synthesized via replacement of all primary hydroxyl groups on β-CD backbone by halogen followed by substitution with thiol groups. The structure was confirmed by FT-IR and 1H NMR spectroscopy. Thiolated CD was characterized for hemolytic effect, ocular irritation, solubility enhancement, viscoelastic behavior and mucoadhesive properties. Moreover, the permeation enhancing effect of thiolated oligomer on different ocular tissues including conjunctiva, sclera and cornea was evaluated with sodium fluorescein (Na-Flu) as a marker. Thiolated β-CD displayed 5360 ± 412 µmol/g thiol groups. The newly synthesized oligomer did not show any hemolytic effect on red blood cells at a concentration of 0.5% (m/v) for an incubation period of 3 h and minimal corneal irritation effects without any inflammation within 72 h. Thiolated β-CD exhibited a 5.3-fold improved aqueous solubility as compared to the unmodified β-CD. Thiolated oligomer (0.5% m/v) enhanced the viscosity of mucus up to 6.2-fold within 4 h and provided a 26-fold prolonged ocular residence time due to mucoadhesion. Moreover, 0.5% (m/v) thiolated β-CD enhanced the permeation of Na-Flu 9.6-, 7.1- and 5.3-fold on conjunctiva, sclera and cornea, respectively. Based on these findings, thiolated β-CD might be a promising auxiliary agent for ocular drug delivery.
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Affiliation(s)
- Mulazim Hussain Asim
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, University of Innsbruck, 6020 Innsbruck, Austria; Department of Pharmaceutics, Faculty of Pharmacy, University of Sargodha, 40100 Sargodha, Pakistan
| | - Muhammad Ijaz
- Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, 54000 Lahore, Pakistan
| | - Arshad Mahmood
- College of Pharmacy, Al Ain University, Abu Dhabi Campus, Abu Dhabi, United Arab Emirates
| | - Patrick Knoll
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, University of Innsbruck, 6020 Innsbruck, Austria
| | - Aamir Jalil
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, University of Innsbruck, 6020 Innsbruck, Austria
| | - Shumaila Arshad
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, 44000 Islamabad, Pakistan
| | - Andreas Bernkop-Schnürch
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, University of Innsbruck, 6020 Innsbruck, Austria.
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Miranda GM, Santos VORE, Bessa JR, Teles YCF, Yahouédéhou SCMA, Goncalves MS, Ribeiro-Filho J. Inclusion Complexes of Non-Steroidal Anti-Inflammatory Drugs with Cyclodextrins: A Systematic Review. Biomolecules 2021; 11:biom11030361. [PMID: 33673414 PMCID: PMC7996898 DOI: 10.3390/biom11030361] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 01/01/2023] Open
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) are one of the most widely used classes of medicines in the treatment of inflammation, fever, and pain. However, evidence has demonstrated that these drugs can induce significant toxicity. In the search for innovative strategies to overcome NSAID-related problems, the incorporation of drugs into cyclodextrins (CDs) has demonstrated promising results. This study aims to review the impact of cyclodextrin incorporation on the biopharmaceutical and pharmacological properties of non-steroidal anti-inflammatory drugs. A systematic search for papers published between 2010 and 2020 was carried out using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol and the following search terms: “Complexation”; AND “Cyclodextrin”; AND “non-steroidal anti-inflammatory drug”. A total of 24 different NSAIDs, 12 types of CDs, and 60 distinct inclusion complexes were identified, with meloxicam and β-CD appearing in most studies. The results of the present review suggest that CDs are drug delivery systems capable of improving the pharmacological and biopharmaceutical properties of non-steroidal anti-inflammatory drugs.
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Affiliation(s)
- Gustavo Marinho Miranda
- Laboratory of Investigation in Genetics and Translational Hematology, Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, BA 40296-710, Brazil; (G.M.M.); (V.O.R.eS.); (S.C.M.A.Y.); (M.S.G.)
| | - Vitória Ohana Ramos e Santos
- Laboratory of Investigation in Genetics and Translational Hematology, Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, BA 40296-710, Brazil; (G.M.M.); (V.O.R.eS.); (S.C.M.A.Y.); (M.S.G.)
| | - Jonatas Reis Bessa
- Institute of Psychology (IPS), Federal University of Bahia (UFBA), Salvador, BA 40170-055, Brazil;
| | - Yanna C. F. Teles
- Agrarian Sciences Center (CCA), Department of Chemistry and Physics (DQF), Federal University of Paraiba (UFPB), Areia, PB 58397-000, Brazil;
| | - Setondji Cocou Modeste Alexandre Yahouédéhou
- Laboratory of Investigation in Genetics and Translational Hematology, Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, BA 40296-710, Brazil; (G.M.M.); (V.O.R.eS.); (S.C.M.A.Y.); (M.S.G.)
| | - Marilda Souza Goncalves
- Laboratory of Investigation in Genetics and Translational Hematology, Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, BA 40296-710, Brazil; (G.M.M.); (V.O.R.eS.); (S.C.M.A.Y.); (M.S.G.)
| | - Jaime Ribeiro-Filho
- Laboratory of Investigation in Genetics and Translational Hematology, Gonçalo Moniz Institute (IGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, BA 40296-710, Brazil; (G.M.M.); (V.O.R.eS.); (S.C.M.A.Y.); (M.S.G.)
- Correspondence: ; Tel.: +55-71-3126-2226
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Aggregate Determination by Permeation Technique. Methods Mol Biol 2020. [PMID: 33113126 DOI: 10.1007/978-1-0716-0920-0_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Permeation technique is used to study molecular aggregation in aqueous solutions including formation of cyclodextrin guest/host aggregates. Since only guest molecules, host molecules and guest/host aggregates that are smaller than the pore size of a given semipermeable membrane are able to permeate through the membrane, negative deviation of permeation profiles indicates formation of guest/host aggregates or self-aggregates. This chapter describes how the method is used to detect formation of nano-sized aggregates and to determine the critical aggregation concentration (cac) from permeation profiles of a guest molecule.
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Soe HMH, Chamni S, Mahalapbutr P, Kongtaworn N, Rungrotmongkol T, Jansook P. The investigation of binary and ternary sulfobutylether-β-cyclodextrin inclusion complexes with asiaticoside in solution and in solid state. Carbohydr Res 2020; 498:108190. [PMID: 33160203 DOI: 10.1016/j.carres.2020.108190] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 11/24/2022]
Abstract
Asiaticoside (AS) is poorly water-soluble compound that can lead to low the bioavailability. The aims of this study were to determine the cyclodextrin (CD) solubilization of AS and characterize binary AS/CD and ternary AS/CD/polymer complexes in solution- and solid-state. Thermal stability of AS through heating process was determined and found that It could withstand by heating through sonication method. Phase-solubility profiles showed that β-cyclodextrin (βCD) exhibited the greatest solubilizing effect but sulfobutylether-βCD (SBEβCD) was selected for further investigations due to its relatively high complexation efficiency (CE) value. The effect of polymers that were poloxamer 407 (P407) and chitosan (CS) on CD solubilization were investigated. It was found that the increment of CE was resulted from the formation of ternary complexes or complex aggregates with confirmed by dynamic light scattering and transmission electron microscopy. Proton nuclear magnetic resonance (1H NMR) data indicated that the cyclohexane moiety of AS was totally inserted into the hydrophobic inner cavity of SBEβCD in the presence or absence of polymer. The molecular modeling study displayed the binding orientation of such complex which correlated to 1H NMR result. The solid state characterized by Fourier transform infra-red, differential scanning calorimetry and powder X-ray diffraction demonstrated the formation of binary AS/SBEβCD and ternary AS/SBEβCD/polymer inclusion complexes. The enhancement of AS dissolution was achieved in both binary and ternary complexes. The permeation study showed that ternary AS/SBEβCD/CS nanoparticles exhibited a promising controlled drug release nanocarrier.
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Affiliation(s)
- Hay ManSaung Hnin Soe
- Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phyathai rd., Pathumwan, Bangkok, 10330, Thailand
| | - Supakarn Chamni
- Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phyathai rd., Pathumwan, Bangkok, 10330, Thailand
| | - Panupong Mahalapbutr
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Napat Kongtaworn
- Program in Bioinformatics and Computational Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thanyada Rungrotmongkol
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Program in Bioinformatics and Computational Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Molecular Sensory Science Center, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Phatsawee Jansook
- Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phyathai rd., Pathumwan, Bangkok, 10330, Thailand.
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Kamel R, El-Wakil NA, Abdelkhalek AA, Elkasabgy NA. Nanofibrillated cellulose/cyclodextrin based 3D scaffolds loaded with raloxifene hydrochloride for bone regeneration. Int J Biol Macromol 2020; 156:704-716. [DOI: 10.1016/j.ijbiomac.2020.04.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/02/2020] [Accepted: 04/05/2020] [Indexed: 01/16/2023]
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7
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González-Louzao R, Lucas-Abellán C, Pérez-Sánchez H, Pedro Cerón-Carrasco J, Antonio Gabaldón J, López-Miranda S, Josefa Yáñez-Gascón M, Asín-Llorca M, Núñez-Delicado E. Encapsulation of finasteride with native and modified γ-cyclodextrins. Extensive characterization of the complexes. Int J Pharm 2020; 587:119619. [PMID: 32693287 DOI: 10.1016/j.ijpharm.2020.119619] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 11/17/2022]
Abstract
The aim of this work was to study the complexation process of FIN with native and modified CDs, to develop an aqueous solution for the topical treatment of male androgenic alopecia. The effect of pH and temperature in the complexation process were studied by solubility studies. The complexes FIN-CDs were characterized by 1HNMR and 2-D NMR (ROESY) spectroscopy. Molecular modeling studies and NMR data were used to build three-dimensional models of the complexes. FTIR, DSC and SEM techniques were also applied to strengthen physicochemical characterization, geometry as well as structural aspects evidencing the effective inclusion of FIN into the CDs' hydrophobic cavity. The most effective CDs in the FIN complexation were γ-CDs, and their modified HP-γ- and methyl-γ-CDs by forming 1:1 complexes. The Kc value obtained for γ-CDs was 9687 ± 51 M-1, whereas the Kc values obtained for HP-γ- and methyl-γ-CDs were lower, indicating that the presence of HP or methyl groups hinder the entry of FIN in the hydrophobic cavity of γ-CDs. In conclusion, FIN aqueous solubility could be increased by complexation with CDs and the aqueous solutions obtained can be used to improve FIN therapeutic possibilities in a pleasant preparation for the patient that guarantees the adherence to the treatment.
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Affiliation(s)
- Rebeca González-Louzao
- Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - Carmen Lucas-Abellán
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Dpto. Ciencias Politécnicas, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - José Pedro Cerón-Carrasco
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Dpto. Ciencias Politécnicas, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - José Antonio Gabaldón
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - Santiago López-Miranda
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | - María Josefa Yáñez-Gascón
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain
| | | | - Estrella Núñez-Delicado
- Dpto. Tecnología Alimentaria y Nutrición, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos, N° 135, Guadalupe, 30107 Murcia, Spain.
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Praphanwittaya P, Saokham P, Jansook P, Loftsson T. Aqueous solubility of kinase inhibitors: II the effect of hexadimethrine bromide on the dovitinib/γ-cyclodextrin complexation. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2019.101463] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fernández MA, Silva OF, Vico RV, de Rossi RH. Complex systems that incorporate cyclodextrins to get materials for some specific applications. Carbohydr Res 2019; 480:12-34. [PMID: 31158527 DOI: 10.1016/j.carres.2019.05.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/06/2019] [Accepted: 05/15/2019] [Indexed: 12/14/2022]
Abstract
Cyclodextrins (CDs) are a family of biodegradable cyclic hydrocarbons composed of α-(1,4) linked glucopyranose subunits, the more common containing 6, 7 or 8 glucose units are named α, β and γ-cyclodextrins respectively. Since the discovery of CDs, they have attracted interest among scientists and the first studies were about the properties of the native compounds and in particular their use as catalysts of organic reactions. Characteristics features of different types of cyclodextrins stimulated investigation in different areas of research, due to its non-toxic and non-inmunogenic properties and also to the development of an improved industrial production. In this way, many materials with important properties have been developed. This mini-review will focus on chemical systems that use cyclodextrins, whatever linked covalently or mediated by the non covalent interactions, to build complex systems developed mainly during the last five years.
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Affiliation(s)
- Mariana A Fernández
- Instituto de Investigaciones en Fisicoquímica de Córdoba, CONICET y Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Ciudad Universitaria, X5000HUA, Córdoba, Argentina.
| | - O Fernando Silva
- Instituto de Investigaciones en Fisicoquímica de Córdoba, CONICET y Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Raquel V Vico
- Instituto de Investigaciones en Fisicoquímica de Córdoba, CONICET y Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Rita H de Rossi
- Instituto de Investigaciones en Fisicoquímica de Córdoba, CONICET y Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Ciudad Universitaria, X5000HUA, Córdoba, Argentina
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Loftsson T, Saokham P, Sá Couto AR. Self-association of cyclodextrins and cyclodextrin complexes in aqueous solutions. Int J Pharm 2019; 560:228-234. [PMID: 30771468 DOI: 10.1016/j.ijpharm.2019.02.004] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/07/2019] [Accepted: 02/09/2019] [Indexed: 12/23/2022]
Abstract
Cyclodextrins (CDs) are oligosaccharides that self-assemble in aqueous solutions to form transient clusters, nanoparticles and small microparticles. The critical aggregation concentration (cac) of the natural αCD, βCD and γCD in pure aqueous solutions was estimated to be 25, 8 and 9 mg/ml, respectively. The cac of 2-hydroxypropyl-β-cyclodextrin (HPβCD), that consists of mixture of isomers, was estimated to be significantly higher or 118 mg/ml. Addition of chaotropic agents (i.e. that disrupts non-covalent bonds such as hydrogen bonds) to the aqueous media increases the cac. Formation of drug/CD complexes can increase or decrease the cac. Due to the transient nature of the CD clusters and nanoparticles they can be difficult to detect and their presence is frequently ignored. However, they have profound effect on the physiochemical properties of CDs and their pharmaceutical applications. For example, the values of stability constants of drug/CD complexes can be both concentration dependent and method dependent. Like in the case of micelles water-soluble polymers can enhance the solubilizing effect of CDs. Also, formation of drug/CD complex nanoparticles appears to increase the ability of CDs to enhance drug delivery through some mucosal membranes.
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Affiliation(s)
- Thorsteinn Loftsson
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavík, Iceland.
| | - Phennapha Saokham
- College of Pharmacy, Rangsit University, Pathum Thani 12000, Thailand.
| | - André Rodrigues Sá Couto
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavík, Iceland.
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Cova TF, Murtinho D, Pais AACC, Valente AJM. Combining Cellulose and Cyclodextrins: Fascinating Designs for Materials and Pharmaceutics. Front Chem 2018; 6:271. [PMID: 30027091 PMCID: PMC6041395 DOI: 10.3389/fchem.2018.00271] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 06/18/2018] [Indexed: 12/15/2022] Open
Abstract
Cellulose and cyclodextrins possess unique properties that can be tailored, combined, and used in a considerable number of applications, including textiles, coatings, sensors, and drug delivery systems. Successfully structuring and applying cellulose and cyclodextrins conjugates requires a deep understanding of the relation between structural, and soft matter behavior, materials, energy, and function. This review focuses on the key advances in developing materials based on these conjugates. Relevant aspects regarding structural variations, methods of synthesis, processing and functionalization, and corresponding supramolecular properties are presented. The use of cellulose/cyclodextrin conjugates as intelligent platforms for applications in materials science and pharmaceutical technology is also outlined, focusing on drug delivery, textiles, and sensors.
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Affiliation(s)
| | | | | | - Artur J. M. Valente
- Coimbra Cemistry Centre, CQC, Department of Chemistry, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal
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Zhang MK, Lyu Y, Zhu X, Wang JP, Jin ZY, Narsimhan G. Enhanced solubility and antimicrobial activity of alamethicin in aqueous solution by complexation with γ-cyclodextrin. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.12.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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13
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Saokham P, Loftsson T. γ-Cyclodextrin. Int J Pharm 2016; 516:278-292. [PMID: 27989822 DOI: 10.1016/j.ijpharm.2016.10.062] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 10/24/2016] [Accepted: 10/26/2016] [Indexed: 12/26/2022]
Abstract
γ-Cyclodextrin (γCD) is a cyclic oligosaccharide formed by bacterial digestion of starch and used as solubilizing agent and stabilizer in a variety of pharmaceutical and food products. γCD is a large (molecular weight 1297Da) hydrophilic molecule that does not readily permeate biological membranes and is rapidly digested by bacteria in the gastrointestinal tract. In humans γCD is metabolized by α-amylase that is found in, for example, saliva, bile fluid and tears. Thus, bioavailability of γCD is negligible. Also, γCD is readily excreted unchanged in the urine after parenteral administration. Like other cyclodextrins, γCD can form water-soluble inclusion complexes with many poorly-soluble compounds. In comparison with the natural αCD and βCD, γCD has the largest hydrophobic cavity, highest water solubility and the most favorable toxicological profile. The focus of this review is production, physiochemical properties, pharmacokinetics, toxicity and applications of γCD and its derivatives. Also, the aggregation behavior of γCD in aqueous media is discussed.
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Affiliation(s)
- Phennapha Saokham
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavik, Iceland
| | - Thorsteinn Loftsson
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavik, Iceland.
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