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García-Santos I, Krümpelmann J, Saa M, Burguera S, Frontera A, Castiñeiras A. Silver(I) Octanuclear Complexes Containing N'-(4-Oxotiazolidin-2-Iliden)picolinohydrazonamide and Nitrate as Bridge Ligands. An Example of Solvatomorphism? Inorg Chem 2024; 63:9221-9236. [PMID: 38713512 PMCID: PMC11110015 DOI: 10.1021/acs.inorgchem.4c00794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/19/2024] [Accepted: 04/26/2024] [Indexed: 05/09/2024]
Abstract
The versatile coordination chemistry of (2Z,N'E)-N'-(4-oxothiazolidin-2-ylidene)picolinohydrazonamide (HAmDHotaz) facilitated the synthesis of new complexes with different silver(I) salts. This paper describes the synthesis and characterization, through elemental analysis and spectroscopic techniques (when solubility permits), of a series of compounds that illustrate the coordinative and structural diversity achievable with the HAmDHotaz ligand. Five silver clusters containing the [Ag8(AmDHotaz)4]4+ nucleus were structurally analyzed by single-crystal X-ray diffraction and were found to exhibit solvomorphism. The compositions of these are [Ag8(AmDHotaz)4(NO3)3(MeOH)(H2O)](NO3)·MeOH·7.5H2O (1), {[Ag8(AmDHotaz)4(NO3)3(H2O)2](NO3)·9.5(H2O)}n (2), {[Ag8(AmDHotaz)4(NO3)3(H2O)2](NO3)·11.5(H2O)}n (2a), {[Ag8(AmDHotaz)4(NO3)2(H2O)2](NO3)(OH)·6H2O}n (3), and {[Ag8(AmDHotaz)4(NO3)2(H2O)](NO3)(OH)·4.5H2O}n (3a). Argentophilic interactions are present in each of the octanuclear structures, where Ag···Ag distances range from 2.828(2) to 2.986(1) Å. These distances are influenced by crystal packing, determined by the counterion and solvent molecules in the structure. In the solvatomorphs, solvent molecules were observed to be disordered. Various hydrogen-bonding interactions, such as N-H···O-N, O-H···O, N-H···O═C, C-H···O-N, and π-π stacking interactions, contribute to the crystal packing. The influence of these weak interactions on the crystal packing was further analyzed using DFT calculations and Bader's theory of atoms-in-molecules, with a focus on argentophilic interactions and Ag···S interactions.
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Affiliation(s)
- Isabel García-Santos
- Department
of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Julia Krümpelmann
- Department
of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Manuel Saa
- Department
of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Sergi Burguera
- Department
de Química, Universitat de les Illes
Balears, Crta. de Valldemossa km 7.5, Palma de Mallorca 07122, Spain
| | - Antonio Frontera
- Department
de Química, Universitat de les Illes
Balears, Crta. de Valldemossa km 7.5, Palma de Mallorca 07122, Spain
| | - Alfonso Castiñeiras
- Department
of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Santiago de Compostela 15782, Spain
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Takibayeva AT, Zhumabayeva GK, Bakibaev AA, Demets OV, Lyapunova MV, Mamaeva EA, Yerkassov RS, Kassenov RZ, Ibrayev MK. Methods of Analysis and Identification of Betulin and Its Derivatives. Molecules 2023; 28:5946. [PMID: 37630198 PMCID: PMC10458966 DOI: 10.3390/molecules28165946] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/21/2023] [Accepted: 07/30/2023] [Indexed: 08/27/2023] Open
Abstract
This scientific work presents practical and theoretical material on the methods of analysis and identification of betulin and its key derivatives. The properties of betulin and its derivatives, which are determined by the structural features of this class of compounds and their tendency to form dimers, polymorphism and isomerization, are considered. This article outlines ways to improve not only the bioavailability but also the solubility of triterpenoids, as well as any hydrophobic drug substances, through chemical transformations by introducing various functional groups, such as carboxyl, hydroxyl, amino, phosphate/phosphonate and carbonyl. The authors of this article summarized the physicochemical characteristics of betulin and its compounds, systematized the literature data on IR and NMR spectroscopy and gave the melting temperatures of key acids and aldehydes based on betulin.
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Affiliation(s)
- Altynaray T. Takibayeva
- Department of Chemistry and Chemical Technologies, NJSC Karaganda Technical University Named after Abylkas Saginov, Karaganda 100027, Kazakhstan;
| | - Gulistan K. Zhumabayeva
- Faculty of Natural Sciences, L.N. Gumilyov Eurasian National University, Astana 010000, Kazakhstan; (G.K.Z.); (R.S.Y.)
| | - Abdigali A. Bakibaev
- Chemical Faculty, National Research Tomsk State University, 634028 Tomsk, Russia; (A.A.B.); (M.V.L.)
| | - Olga V. Demets
- Department of Chemistry and Chemical Technologies, NJSC Karaganda Technical University Named after Abylkas Saginov, Karaganda 100027, Kazakhstan;
| | - Maria V. Lyapunova
- Chemical Faculty, National Research Tomsk State University, 634028 Tomsk, Russia; (A.A.B.); (M.V.L.)
| | - Elena A. Mamaeva
- Chemical Faculty, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia;
| | - Rakhmetulla Sh. Yerkassov
- Faculty of Natural Sciences, L.N. Gumilyov Eurasian National University, Astana 010000, Kazakhstan; (G.K.Z.); (R.S.Y.)
| | - Rymchan Z. Kassenov
- Department of Organic Chemistry and Polymers, Chemistry Faculty, NJSC Karaganda University Named after Y.A. Buketov, Karaganda 100024, Kazakhstan; (R.Z.K.); (M.K.I.)
| | - Marat K. Ibrayev
- Department of Organic Chemistry and Polymers, Chemistry Faculty, NJSC Karaganda University Named after Y.A. Buketov, Karaganda 100024, Kazakhstan; (R.Z.K.); (M.K.I.)
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Petrenko M, Güttler A, Funtan A, Keßler J, Emmerich D, Paschke R, Vordermark D, Bache M. Combined 3-O-acetylbetulin treatment and carbonic anhydrase IX inhibition results in additive effects on human breast cancer cells. Chem Biol Interact 2021; 333:109326. [PMID: 33245928 DOI: 10.1016/j.cbi.2020.109326] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/11/2020] [Accepted: 11/20/2020] [Indexed: 12/18/2022]
Abstract
Hypoxia plays a key role in tumor progression and resistance to radiotherapy. Expression of the transmembrane-tethered enzyme carbonic anhydrase IX (CA IX) is strongly induced by hypoxia. High CA IX expression levels correlate with poor prognosis in cancer patients. Previously, we showed that the downregulation of CA IX expression by siRNA interference and the inhibition of CA IX activity results in increased cytotoxicity, inhibition of migration and radiosensitization of hypoxic cancer cells. Betulinic acid (BA) is a natural compound derived from birch bark. It has shown promising anti-tumor effects due to its cancer cell specific cytotoxic properties. We have shown that BA inhibits the HIF-1α pathway, resulting in apoptosis, inhibition of migration and enhanced cytotoxicity of breast cancer cells. In this study, we investigate the effects of the novel betulin derivative 3-O-acetylbetulin (3-AC) and carbonic anhydrase inhibitors (CAI) octyl disulfamate (OCT) or 4-(3-[4-fluorophenyl]ureido)benzenesulfonamide (SLC-0111), on cellular and radiobiological parameters in MDA-MB-231 and MCF-7 cells. Treatment with 3-AC or OCT alone only caused moderate cytotoxicity, reduction in cell migration, ROS production and DNA damage. However, the combined treatment with 3-AC and CAI strongly enhanced radiosensitivity, increased cytotoxicity, inhibited cell motility and enhanced DNA damage. Our findings suggest that the combination of two bioactive drugs 3-AC and a CAI, such as OCT or SLC-0111, could be a promising therapeutic approach for targeting hypoxic tumor cells.
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Affiliation(s)
- Marina Petrenko
- Department of Radiotherapy, Martin Luther University Halle-Wittenberg, Ernst Grube Straße 40, D-06120, Halle, Germany.
| | - Antje Güttler
- Department of Radiotherapy, Martin Luther University Halle-Wittenberg, Ernst Grube Straße 40, D-06120, Halle, Germany.
| | - Anne Funtan
- Biozentrum, Martin Luther University Halle-Wittenberg, Weinbergweg 22, D-06120, Halle, Germany.
| | - Jacqueline Keßler
- Department of Radiotherapy, Martin Luther University Halle-Wittenberg, Ernst Grube Straße 40, D-06120, Halle, Germany.
| | - Daniel Emmerich
- Biozentrum, Martin Luther University Halle-Wittenberg, Weinbergweg 22, D-06120, Halle, Germany.
| | - Reinhard Paschke
- Biozentrum, Martin Luther University Halle-Wittenberg, Weinbergweg 22, D-06120, Halle, Germany.
| | - Dirk Vordermark
- Department of Radiotherapy, Martin Luther University Halle-Wittenberg, Ernst Grube Straße 40, D-06120, Halle, Germany.
| | - Matthias Bache
- Department of Radiotherapy, Martin Luther University Halle-Wittenberg, Ernst Grube Straße 40, D-06120, Halle, Germany.
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Yuan P, Yang D, Wang R, Gong N, Zhang L, Lu Y, Du G. Characterization of a New Solvatomorph of Drospirenone by Thermogravimetry-Mass Spectrometry Combined with Other Solid-State Analysis Methods. ACS OMEGA 2020; 5:25289-25296. [PMID: 33043207 PMCID: PMC7542801 DOI: 10.1021/acsomega.0c03531] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
Drospirenone (DE) is a fourth-generation progesterone that has been widely used in oral contraceptives for women because of its safety and few side effects in terms of pharmacological activity. A new solvatomorph (crystal form C) of DE with dimethyl sulfoxide was identified and characterized for the first time through a thermogravimetry-mass spectrometry (TG-MS) coupling system. The thermodynamic property of the new solvatomorph of DE was different from those of most pharmaceutical solvatomorphs, and it was revealed via the skimmer-type interfaced TG-MS system and differential scanning calorimetry. This new solvatomorph and a polymorph of DE obtained without solvent (crystal form A) were well characterized by X-ray crystallography and vibrational spectroscopic analysis. Computational studies based on their single-crystal structures, such as Hirshfeld surface analyses, were used to determine the intermolecular interactions in the crystal network. The single-crystal structure of crystal form C of DE was determined and reported for the first time.
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Affiliation(s)
- Penghui Yuan
- Beijing
City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical
Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Dezhi Yang
- Beijing
City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical
Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ruonan Wang
- Beijing
City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical
Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ningbo Gong
- Beijing
City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical
Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Li Zhang
- Beijing
City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical
Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yang Lu
- Beijing
City Key Laboratory of Polymorphic Drugs, Center of Pharmaceutical
Polymorphs, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Guanhua Du
- Beijing
City Key Laboratory of Drug Target and Screening Research, National
Center for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union
Medical College, Beijing 100050, China
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5
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Nicolov M, Ghiulai RM, Voicu M, Mioc M, Duse AO, Roman R, Ambrus R, Zupko I, Moaca EA, Coricovac DE, Farcas C, Racoviceanu RM, Danciu C, Dehelean CA, Soica C. Cocrystal Formation of Betulinic Acid and Ascorbic Acid: Synthesis, Physico-Chemical Assessment, Antioxidant, and Antiproliferative Activity. Front Chem 2019; 7:92. [PMID: 30847340 PMCID: PMC6393380 DOI: 10.3389/fchem.2019.00092] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 02/04/2019] [Indexed: 01/08/2023] Open
Abstract
Betulinic acid (BA) was demonstrated to be a very promising anticancer agent against various tumor cell lines such as breast, colon, lung, and brain. Despite its strong cytotoxic effect, betulinic acid exhibits low water solubility, feature that is reflected in its poor bioavailability. To overcome these drawbacks, numerous strategies were conducted to improve its physicochemical and pharmacokinetic profile, among which cocrystalization emerged as a promising approach. Thus, our work consisted in obtaining slowly grown cocrystals of BA and ascorbic acid (BA+VitC) in isopropyl alcohol obtained in a hydrothermal experiment. The newly formed cocrystals were characterized by physico-chemical methods such asSEM, DSC, XRPD, and FT-IR spectroscopy demonstrating BA+VitC cocrystal formation while their antioxidant activity revealed an additive antioxidant effect. To investigate the biological effect, BA+VitC cocrystals were tested on HaCat (immortalized human keratinocytes), B164A5 and B16F0 (murine melanoma), MCF7 and MDA-MB-231 (human breast cancer), and HeLa (cervical cancer) cell lines. Results of BA upon the tested tumor cell lines, after co-crystallization with vitamin C, indicated a superior cytotoxic effect with the preservation of a good selectivity index assumably due to an improved BA water solubility and consequently an optimized bioavailability.
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Affiliation(s)
- Mirela Nicolov
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Roxana M Ghiulai
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Mirela Voicu
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Marius Mioc
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Adina Octavia Duse
- Faculty of Medicine, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Roxana Roman
- Faculty of Physics, West University of Timisoara, Timisoara, Romania
| | - Rita Ambrus
- Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Szeged, Hungary
| | - Istvan Zupko
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - Elena Alina Moaca
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Dorina E Coricovac
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Claudia Farcas
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | | | - Corina Danciu
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | | | - Codruta Soica
- Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
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6
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Melnikova NB, Malygina DS, Klabukova IN, Belov DV, Vasin VA, Petrov PS, Knyazev AV, Markin AV. Betulin-3,28-diphosphate. Physico-Chemical Properties and In Vitro Biological Activity Experiments. Molecules 2018; 23:E1175. [PMID: 29757999 PMCID: PMC6099732 DOI: 10.3390/molecules23051175] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 05/10/2018] [Accepted: 05/11/2018] [Indexed: 11/16/2022] Open
Abstract
Betulin-3,28-diphosphate (BDP) obtained by phosphorylation of betulin using POCl₃ has two main structural forms-BDP-1 and BDP-2-which differ in ethanol solubility, melting point, FTIR spectra, thermoanalytical characteristics and biological activity. Betulin-3,28-diphosphate and its sodium salt (Na-BDP) were characterized using 13C and 31P-NMR spectra, powder XRD experiments, as well as differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) methods. The exo-effects at 193 ± 8 °C for ethanol soluble BDP-1 samples (-19.7 ± 0.2 kJ∙mol-1) were about three times less than for ethanol insoluble BDP-2 samples f (-70.5 ± 0.7 kJ∙mol-1). The DSC curves of Na-BDP-1 and Na-BDP-2 characterized the endo-effects having a maximum at 95⁻112 °C. Water-soluble Na-BDP-1 was obtained as needle-like crystals, unlike poorly crystalline Na-BDP-2, whereas BDP-1 and BDP-2 aged with time and were isolated as amorphous substances. In vitro experiments on rats showed that compared to the control, Na-BDP-1 increased catalase and SOD activity and improved energy metabolism more effectively than Na-BDP-2.
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Affiliation(s)
- Nina B Melnikova
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Darina S Malygina
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Irina N Klabukova
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Denis V Belov
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Viktor A Vasin
- Department of Chemistry, N.P. Ogarev Mordovian State University, Bolshevistskaya St. 68, 430005 Saransk, Russia.
| | - Pavel S Petrov
- Department of Chemistry, N.P. Ogarev Mordovian State University, Bolshevistskaya St. 68, 430005 Saransk, Russia.
| | - Alexander V Knyazev
- Department of Chemistry, Lobachevsky University, 23/5 Gagarin Av., 603950 Nizhny Novgorod, Russia.
| | - Alexey V Markin
- Department of Chemistry, Lobachevsky University, 23/5 Gagarin Av., 603950 Nizhny Novgorod, Russia.
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7
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Mioc M, Pavel IZ, Ghiulai R, Coricovac DE, Farcaş C, Mihali CV, Oprean C, Serafim V, Popovici RA, Dehelean CA, Shtilman MI, Tsatsakis AM, Şoica C. The Cytotoxic Effects of Betulin-Conjugated Gold Nanoparticles as Stable Formulations in Normal and Melanoma Cells. Front Pharmacol 2018; 9:429. [PMID: 29773989 PMCID: PMC5943567 DOI: 10.3389/fphar.2018.00429] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/11/2018] [Indexed: 12/19/2022] Open
Abstract
Gold nanoparticles are currently investigated as theranostics tools in cancer therapy due to their proper biocompatibility and increased efficacy related to the ease to customize the surface properties and to conjugate other molecules. Betulin, [lup-20(29)-ene-3β, 28-diol], is a pentacyclic triterpene that has raised scientific interest due to its antiproliferative effect on several cancer types. Herein we described the synthesis of surface modified betulin-conjugated gold nanoparticles using a slightly modified Turkevich method. Transmission electron microscopy (TEM) imaging, dynamic light scattering (DLS), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were used for the characterization of obtained gold nanoparticles. Cytotoxic activity and apoptosis assessment were carried out using the MTT and Annexin V/PI apoptosis assays. The in vitro results showed that betulin coated gold nanoparticles presented a dose-dependent cytotoxic effect and induced apoptosis in all tested cell lines.
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Affiliation(s)
- Marius Mioc
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Ioana Zinuca Pavel
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Roxana Ghiulai
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Dorina E Coricovac
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Claudia Farcaş
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Ciprian-Valentin Mihali
- "George Emil Palade" Electron Microscopy Center, Institute of Life Sciences, "Vasile Goldiş" Western University of Arad, Arad, Romania
| | - Camelia Oprean
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania.,"Pius Brînzeu" Timişoara County Emergency Clinical Hospital, Oncogen Institute, Timişoara, Romania
| | - Vlad Serafim
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania.,Department of Natural Sciences, Middlesex University London, London, United Kingdom
| | - Ramona A Popovici
- Faculty of Dentistry, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Cristina A Dehelean
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
| | - Michael I Shtilman
- Dmitry Mendeleev University of Chemical Technology of Russia, Moscow, Russia
| | - Aristidis M Tsatsakis
- Department of Forensic Sciences and Toxicology, Faculty of Medicine, University of Crete, Heraklion, Greece
| | - Codruţa Şoica
- Faculty of Pharmacy, Victor Babeş University of Medicine and Pharmacy, Timişoara, Romania
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8
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Zhang XR, He SF, Zhang S, Li J, Li S, Liu JS, Zhang L. Polymorphs and solvatomorphs of azilsartan medoxomil: Elucidation of solvent-induced construction and conformational diversity. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Abstract
Three solvates for sulfamethazine (SMT) are reported. The solvent interacts with SMT in a strong hydrogen bonding network imparting stability to the solvate structure.
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Affiliation(s)
- Dipali Ahuja
- Synthesis and Solid State Pharmaceutical Centre
- Department of Chemical Sciences
- Bernal Institute
- University of Limerick
- Limerick
| | - Pauric Bannigan
- Synthesis and Solid State Pharmaceutical Centre
- Department of Chemical Sciences
- Bernal Institute
- University of Limerick
- Limerick
| | - Åke C. Rasmuson
- Synthesis and Solid State Pharmaceutical Centre
- Department of Chemical Sciences
- Bernal Institute
- University of Limerick
- Limerick
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10
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Xiong X, Du Q, Zeng X, He J, Yang H, Li H. Solvates and polymorphs of rebamipide: preparation, characterization, and physicochemical analysis. RSC Adv 2017. [DOI: 10.1039/c7ra02895d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Preparation and characterization of four solvates and three novel polymorphs of rebamipide, and investigations on the stability, solubility, and dissolution rate of the stable solid forms.
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Affiliation(s)
- Xinnuo Xiong
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Qiaohong Du
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Xia Zeng
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Jiawei He
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Hongqin Yang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Hui Li
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
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11
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Synthesis, structure and cytotoxic activity of acetylenic derivatives of betulonic and betulinic acids. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.102] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Isolation, Characterization, Crystal Structure Elucidation of Two Flavanones and Simultaneous RP-HPLC Determination of Five Major Compounds from Syzygium campanulatum Korth. Molecules 2015; 20:14212-33. [PMID: 26248073 PMCID: PMC6331876 DOI: 10.3390/molecules200814212] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 07/06/2015] [Indexed: 11/27/2022] Open
Abstract
Two flavanones named (2S)-7-Hydroxy-5-methoxy-6,8-dimethyl flavanone (1), (S)-5,7-dihydroxy-6,8-dimethyl-flavanone (2), along with known chalcone, namely, (E)-2ʹ,4ʹ-dihydroxy-6ʹ-methoxy-3ʹ,5ʹ-dimethylchalcone (3) and two triterpenoids, namely, betulinic and ursolic acids (4 and 5), were isolated from the leaves of Syzygium campanulatum Korth (Myrtaceae). The structures of compounds (1 and 2) were determined on the basis of UV-visible, FTIR, NMR spectroscopies and LC-EIMS analytical techniques. Furthermore, new, simple, precise, selective, accurate, highly sensitive, efficient and reproducible RP-HPLC method was developed and validated for the quantitative analysis of the compounds (1–5) from S. campanulatum plants of five different age. RP-HPLC method was validated in terms of specificity, linearity (r2 ≤ 0.999), precision (2.0% RSD), and recoveries (94.4%–105%). The LOD and LOQ of these compounds ranged from 0.13–0.38 and 0.10–2.23 µg·mL−1, respectively. Anti-proliferative activity of isolated flavanones (1 and 2) and standardized extract of S. campanulatum was evaluated on human colon cancer (HCT 116) cell line. Compounds (1 and 2) and extract revealed potent and dose-dependent activity with IC50 67.6, 132.9 and 93.4 µg·mL−1, respectively. To the best of our knowledge, this is the first study on isolation, characterization, X-ray crystallographic analysis of compounds (1 and 2) and simultaneous RP-HPLC determination of five major compounds (1–5) from different age of S. campanulatum plants.
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Tang W, Chen NH, Li GQ, Wang GC, Li YL. Crystal structure of betulinic acid methanol monosolvate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o1242-3. [PMID: 25553022 PMCID: PMC4257419 DOI: 10.1107/s1600536814023848] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 10/29/2014] [Indexed: 11/16/2022]
Abstract
The title compound [systematic name: 3β-hydroxylup-20(29)-en-28-oic acid methanol monosolvate], C30H48O3·CH3OH, is a solvent pseudopolymorph of a naturally occurring plant-derived lupane-type pentacyclic triterpenoid, which was isolated from the traditional Chinese medicinal plant Syzygium jambos (L.) Alston. The dihedral angle between the planes of the carboxylic acid group and the olefinic group is 12.17 (18)°. The A/B, B/C, C/D and D/E ring junctions are all trans-fused. In the crystal, O—H⋯O hydrogen bonds involving the hydroxy and carboxylic acid groups and the methanol solvent molecule give rise to a two-dimensional network structure lying parallel to (001).
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Affiliation(s)
- Wei Tang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
| | - Neng-Hua Chen
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
| | - Guo-Qiang Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
| | - Guo-Cai Wang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yao-Lan Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
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