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López-Miranda S, Guardiola L, Hernández-Sánchez P, Núñez-Delicado E. Complexation between oleanolic and maslinic acids with native and modified cyclodextrins. Food Chem 2017; 240:139-146. [PMID: 28946254 DOI: 10.1016/j.foodchem.2017.07.092] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/29/2017] [Accepted: 07/18/2017] [Indexed: 11/25/2022]
Abstract
Oleanolic (OA) and maslinic (MA) acids are two natural triterpenoids with a wide range of beneficial effects for human health. However, their low solubility and permeability make their application in the food, or pharmaceutical, industry difficult. The complexation of OA and MA with α- β-, γ-, HP-α-, HP-β- and HP-γ-CDs, under different pH and temperature conditions, has been studied. Neither α- nor HP-α-CDs formed inclusion complexes, while β-, HP-β- and HP-γ-CDs provided AL type and γ-CDs BS phase solubility diagrams. Complexation was shown to be more stable in the case of MA but complexation efficiency was greater for OA. Increasing the pH and temperature of the complexation media tended to improve the complexation process with triterpenic acids.
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Affiliation(s)
- Santiago López-Miranda
- Department of Food Technology & Nutrition, UCAM Universidad Católica de Murcia, Avenida de los Jerónimos s/n, 30107 Guadalupe, Murcia, Spain
| | - Lucía Guardiola
- Department of Food Technology & Nutrition, UCAM Universidad Católica de Murcia, Avenida de los Jerónimos s/n, 30107 Guadalupe, Murcia, Spain
| | - Pilar Hernández-Sánchez
- Department of Food Technology & Nutrition, UCAM Universidad Católica de Murcia, Avenida de los Jerónimos s/n, 30107 Guadalupe, Murcia, Spain
| | - Estrella Núñez-Delicado
- Department of Food Technology & Nutrition, UCAM Universidad Católica de Murcia, Avenida de los Jerónimos s/n, 30107 Guadalupe, Murcia, Spain.
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Ramos AI, Vaz PD, Braga SS, Silva AMS. Association of aescin with β- and γ-cyclodextrins studied by DFT calculations and spectroscopic methods. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:348-357. [PMID: 28890859 PMCID: PMC5566205 DOI: 10.3762/bjnano.8.37] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 01/06/2017] [Indexed: 05/14/2023]
Abstract
Background: Aescin, a natural mixture of saponins occurring in Aesculus hippocastanum, exhibits important flebotonic properties, being used in the treatment of chronic venous insufficiency in legs. The inclusion of aescin into cyclodextrins (CDs) is a technical solution for its incorporation into the textile of stockings, but details of the physicochemistry of these host-guest systems are lacking. This work investigates the inclusion of aescin into the cavities of two native cyclodextrins, β-CD and γ-CD. Results: The continuous variation method applied to aqueous-phase 1H nuclear magnetic resonance (1H NMR) has demonstrated that the preferred CD/aescin inclusion stoichiometries are 2:1 with β-CD and 1:1 with γ-CD. The affinity constant calculated for γ-CD·aescin was 894 M-1, while for 2β-CD·aescin it was estimated to be 715 M-1. Density functional theory (DFT) calculations on the interaction of aescin Ib with CDs show that an inclusion can indeed occur and it is further demonstrated that the wider cavity of γ-CD is more adequate to accommodate this large guest. ROESY spectroscopy is consistent with the formation of a complex in which the triterpenic moiety of aescin is included into the cavity of γ-CD. The higher stability of this geometry was confirmed by DFT. Furthermore, DFT calculations were applied to determine the chemical shifts of the protons H3 and H5 of the CDs in the optimised structures of the inclusion complexes. The calculated values are very similar to the experimental data, validating the approach made in this study by NMR. Conclusion: The combination of experimental data from aqueous-state NMR measurements and theoretical calculations has demonstrated that γ-CD is the most suitable host for aescin, although the inclusion also occurs with β-CD. The geometry of the γ-CD·aescin complex is characterised by the inclusion of the triterpene segment of aescin into the host cavity.
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Affiliation(s)
- Ana I Ramos
- CICECO, Complexo de Laboratórios Tecnológicos, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
- Current affiliation: INEGI-FEUP Faculty of Engineering of the University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Pedro D Vaz
- CQB, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal
- ISIS Neutron & Muon Source, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Susana S Braga
- QOPNA, Departamento de Química, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Artur M S Silva
- QOPNA, Departamento de Química, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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Wang J, Jiang Z, Xiang L, Li Y, Ou M, Yang X, Shao J, Lu Y, Lin L, Chen J, Dai Y, Jia L. Synergism of ursolic acid derivative US597 with 2-deoxy-D-glucose to preferentially induce tumor cell death by dual-targeting of apoptosis and glycolysis. Sci Rep 2014; 4:5006. [PMID: 25833312 PMCID: PMC4650901 DOI: 10.1038/srep05006] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 05/01/2014] [Indexed: 02/08/2023] Open
Abstract
Ursolic acid (UA) is a naturally bioactive product that exhibits potential anticancer effects. The relatively safe and effective molecule intrigued us to explore a way to further improve its anti-cancer activity and tumor-targeting specificity. In the present study, a series of structural modifications of UA was achieved, which resulted in significant increase in growth inhibition on various cancer cell lines with minimal effects on normal cells. The leading molecule US597 (UA-4) caused depolarization of mitochondrial membrane potential, cell arrest in G0/G1 phase and apoptosis/necrosis in a dose-dependent manner. Structural docking suggested that the carbon chains of the modified UA derivatives compete strongly with glucose for binding to glucokinase, the key glycolysis enzyme presumably active in cancer cells. The combination of 2-deoxy-D-glucose (2-DG) and UA-4 induced cell cycle arrest in G2/M phase, promoted caspase-dependent cell death, reduced hexokinase activity, aggravated depletion of intracellular ATP, decreased lactate production and synergistically inhibited cancer cell growth in vitro (HepG2) and in vivo (H22). Collectively, our findings suggest that the structural modification enhances efficacy and selectivity of UA, and the combination of UA-4 with 2-DG produces synergistic inhibition on hepatoma cell proliferation by dual targeting of apoptosis and glycolysis.
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Affiliation(s)
- Jichuang Wang
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
- These authors contributed equally to this work
| | - Zhou Jiang
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
- These authors contributed equally to this work
| | - Liping Xiang
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Yuanfang Li
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Minrui Ou
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Xiang Yang
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Jingwei Shao
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Yusheng Lu
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Lifeng Lin
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
| | - Jianzhong Chen
- School of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350108, China
| | - Yun Dai
- Virginia Commonwealth University and the Massey Cancer Center, Room 234 Goodwin Research Building, 401 College Street, Richmond VA 23298, USA
| | - Lee Jia
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, 523 Industry Road, Science Building, 3FL., Fuzhou, Fujian 350002, China
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Mihajlovic T, Kachrimanis K, Graovac A, Djuric Z, Ibric S. Improvement of aripiprazole solubility by complexation with (2-hydroxy)propyl-β-cyclodextrin using spray drying technique. AAPS PharmSciTech 2012; 13:623-31. [PMID: 22535520 DOI: 10.1208/s12249-012-9786-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Accepted: 03/28/2012] [Indexed: 11/30/2022] Open
Abstract
Due to the fact that the number of new poorly soluble active pharmaceutical ingredients is increasing, it is important to investigate the possibilities of improvement of their solubility in order to obtain a final pharmaceutical formulation with enhanced bioavailability. One of the strategies to increase drug solubility is the inclusion of the APIs in cyclodextrins. The aim of this study was to investigate the possibility of aripiprazole solubility improvement by inclusion in (2-hydroxy)propyl-β-cyclodextrin (HPBCD) and simultaneous manipulation of pH of the medium and addition of polyvinylpyrrolidone. Aripiprazole-HPBCD complexes were prepared by spray drying aqueous drug-HPBCD solutions, and their properties were compared with those prepared by solvent-drop co-grinding and physical mixing. The obtained powders were characterized by thermoanalytical methods (TGA and DSC), FTIR spectroscopy, their dissolution properties were assessed, while the binding of aripiprazole into the cavity of HPBCD was studied by molecular docking simulations. The solubilization capacity was found to be dependent on pH as well as the buffer solution's ionic composition. The presence of PVP in the formulation could affect the solubilization capacity significantly, but further experimentation is required before its effect is fully understood. On the basis of solubility studies, the drug/HPBCD stoichiometry was found to be 1:3. The spray-dried products were free of crystalline aripiprazole, they possessed higher solubility and dissolution rate, and were stable enough over a prolonged period of storage. Spray drying of cyclodextrin solutions proved to be an appropriate and efficient technique for the preparation of highly soluble inclusion compounds of aripiprazole and HPBCD.
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Li R, Quan P, Liu DF, Wei FD, Zhang Q, Xu QW. The influence of cosolvent on the complexation of HP-beta-cyclodextrins with oleanolic acid and ursolic acid. AAPS PharmSciTech 2009; 10:1137-44. [PMID: 19834815 PMCID: PMC2799583 DOI: 10.1208/s12249-009-9317-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Accepted: 09/18/2009] [Indexed: 11/30/2022] Open
Abstract
The present work was aimed at the influence of ethanol on the complex formation of hydroxypropyl-beta-cyclodextrin (HP-beta-CD) with oleanolic acid (OA) and ursolic acid (UA), two insoluble isomeric triterpenic acids. Phase solubility studies were carried out to evaluate the solubilizing power of HP-beta-CD, in association with ethanol, toward OA and UA. A mathematical model was applied to explain and predict the solubility of OA and UA influenced by HP-beta-CD and ethanol. The solid complexes were prepared by evaporating the filtrate of samples which was prepared in different complexing media. The solubility of OA is much higher than that of UA in all the tested aqueous solutions. The solubility of OA and UA can be increased over 900 and 200 times, respectively, by forming complex with HP-beta-CD. Ethanol (0.5%, v/v) can help the formation of OA-HP-beta-CD complex, but is harmful to the formation of UA-HP-beta-CD complex. Increasing solubility in water can be achieved by adding ethanol into the complexing media, but the concentration of ethanol should be optimized. The ring E of the chemical compounds has a great influence on the complexing process.
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Affiliation(s)
- Rui Li
- />Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, 140 Hanzhong Road, 210029 Nanjing, People’s Republic of China
| | - Peng Quan
- />Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, 110016 Shenyang, People’s Republic of China
| | - Dong-Fei Liu
- />Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, 140 Hanzhong Road, 210029 Nanjing, People’s Republic of China
| | - Fang-Di Wei
- />Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, 140 Hanzhong Road, 210029 Nanjing, People’s Republic of China
| | - Qing Zhang
- />Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, 140 Hanzhong Road, 210029 Nanjing, People’s Republic of China
| | - Qun-Wei Xu
- />Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, 140 Hanzhong Road, 210029 Nanjing, People’s Republic of China
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