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Chen Y, Zhou Q, Pan F, Rong B, Xiao R, Wen Y, Song J, Tu Z, Liu S, Li Y, Zhang X. Synthesis and anti-influenza virus activity of substituted dibenzoxepine-based baloxavir derivatives. Eur J Med Chem 2024; 280:116922. [PMID: 39388905 DOI: 10.1016/j.ejmech.2024.116922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Revised: 09/20/2024] [Accepted: 09/26/2024] [Indexed: 10/12/2024]
Abstract
Seasonal influenza poses a significant threat to global public health, driving the need for effective anti-influenza agents. The PA protein, which captures the pre-mRNA cap structure, is crucial for the replication of the influenza virus and serves as an important target for developing such agents. Baloxavir, a PA inhibitor, has shown excellent activity against influenza A and B viruses. In this study, its structure was optimized using bioisosteric replacement to develop novel dibenzoxepine-based derivatives for combating influenza. As the lead compounds, ATV03 (EC50 = 0.78 ± 0.10 nM, SI > 64103) and ATV07 (EC50 = 0.78 ± 0.01 nM, SI = 31603) demonstrated excellent anti-influenza A (H3N2) activity and SI, and possessed favorable anti-influenza B activity, with 2.02 ± 0.40 nM and 2.32 ± 0.29 nM of EC50 respectively. They showed improved bioavailability and metabolic stability. Mechanism studies revealed that ATV03 and ATV07 both possessed significant activity in inhibiting PA and RdRp as well as disturbing NP. Consequently, ATV03 was selected for further investigation in the fight against seasonal and pandemic influenza due to its superior bioavailability, metabolic stability, and efficacy against multiple influenza A viruses.
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Affiliation(s)
- Yongzhi Chen
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China
| | - Qifan Zhou
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China.
| | - Fan Pan
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China
| | - Binhao Rong
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Renwei Xiao
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China
| | - Yuanmei Wen
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China
| | - Jingyuan Song
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China; State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, 510180, China
| | - Zhengchao Tu
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, 510632, China
| | - Shuwen Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China; State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Southern Medical University, Guangzhou, 510515, China.
| | - Yingjun Li
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, 510180, China.
| | - Xumu Zhang
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, Shenzhen Grubbs Institute and Medi-X Pingshan, Southern University of Science and Technology, Shenzhen, 518000, China.
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Casulli MA, Yan R, Takeuchi S, Cesari A, Mancin F, Hayashita T, Hashimoto T, Taurino I. Cyclodextrin-Based Nanogels for Stabilization and Sensing of Curcumin. ACS APPLIED NANO MATERIALS 2024; 7:20153-20162. [PMID: 39296865 PMCID: PMC11407302 DOI: 10.1021/acsanm.4c02972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 08/09/2024] [Accepted: 08/19/2024] [Indexed: 09/21/2024]
Abstract
Curcumin (CUR), a polyphenolic substance from turmeric, displays diverse medicinal properties. However, its instability poses challenges in detection. Cyclodextrin-based nanogels (CyDngs) offer a transformative solution, enhancing CUR's stability in aqueous solutions. Multisensing approaches involving fluorescence, electrochemistry, and NMR spectroscopy were employed, demonstrating CyDngs' pivotal role in CUR detection. Langmuir analysis revealed a binding constant of 1.4 × 104 M-1 for CyDngs, highlighting their effectiveness over native β-CyDs. The study emphasized CyDngs' superiority in stabilizing CUR and enabling reliable and sensitive detection with very diverse methods.
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Affiliation(s)
- Maria Antonietta Casulli
- Micro and Nano-Systems (MNS), Department of Electrical Engineering (ESAT), Katholieke Universiteit Leuven (KU Leuven), 3001 Leuven, Belgium
| | - Ruyu Yan
- Graduate School of Science and Technology, Department of Materals and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Satomi Takeuchi
- Graduate School of Science and Technology, Department of Materals and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Andrea Cesari
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Fabrizio Mancin
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Takashi Hayashita
- Graduate School of Science and Technology, Department of Materals and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Takeshi Hashimoto
- Graduate School of Science and Technology, Department of Materals and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Irene Taurino
- Micro and Nano-Systems (MNS), Department of Electrical Engineering (ESAT), Katholieke Universiteit Leuven (KU Leuven), 3001 Leuven, Belgium
- Semiconductor Physics (HF), Department of Physics and Astronomy, Katholieke Universiteit Leuven (KU Leuven), 3001 Leuven, Belgium
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Aree T. Supramolecular assemblies of citalopram and escitalopram in β-cyclodextrin dimeric cavity: Crystallographic and theoretical insights. Carbohydr Polym 2024; 329:121771. [PMID: 38286546 DOI: 10.1016/j.carbpol.2023.121771] [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: 11/17/2023] [Revised: 12/27/2023] [Accepted: 12/29/2023] [Indexed: 01/31/2024]
Abstract
Cyclodextrin (CD) encapsulation improves physicochemical and pharmacological properties of selective serotonin reuptake inhibitors (SSRIs), which are efficacious in treating depression, a global mental health problem. Here, we scrutinize β-CD inclusion complexes with racemate citalopram (rac-CTP; 1) and escitalopram ((S)-CTP; 2) by combined single-crystal X-ray diffraction and DFT full-geometry optimization. X-ray analysis unveiled that the 2:2 inclusion complexes of 1 and 2 with similar inclusion modes and topologies are stabilized by various intermolecular interactions of host-guest CH···π, host-host OH···O H-bonds, and guest-guest F···F in the tail-to-tail dimeric asymmetric unit. In the crystals, these dimers are stacked on top of each other, yielding similar channel structures of distinct crystal symmetries, triclinic, P1 (1) and monoclinic, P21 (2), which are further maintained by guest-guest π···π and CN···π interactions. The thermodynamic stabilities evaluated by DFT calculation indicate the vital role of weak intermolecular interactions in the formation and stabilization of the β-CD monomeric and dimeric inclusion complexes. This study provides crystallographic and theoretical evidence for the improved stability and the masked bitterness of CTP through β-CD encapsulation as patented previously and suggests the pharmaceutical implications in the drug delivery and enantioseparation.
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Affiliation(s)
- Thammarat Aree
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
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Demircan Ozelcaglayan E, Honek JF, Parker WJ. Molecular level investigation of interactions between pharmaceuticals and β-cyclodextrin (β-CD) functionalized adsorption sites for removal of pharmaceutical contaminants from water. CHEMOSPHERE 2024; 347:140639. [PMID: 37939929 DOI: 10.1016/j.chemosphere.2023.140639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/23/2023] [Accepted: 11/05/2023] [Indexed: 11/10/2023]
Abstract
This study describes a novel application of the use of molecular modeling tools for investigating the adsorption of organic micropollutants (OMPs) from water by nanocomposites. The partitioning of pharmaceuticals onto β-Cyclodextrin (β-CD) functionalized adsorbents was investigated at the molecular level to explore the atomistic interactions of pharmaceutical contaminants in water systems with β-CD and to provide insight into possible approaches for removal of pharmaceuticals from water. Molecular electrostatic surface potential mapping of β-CD derivatives was employed to examine the impact of substitution degree of β-CD and type of grafting agent on host-guest complexation. The stability of the complexes of selected pharmaceuticals and β-CD derivatives were assessed via molecular dynamics simulations to evaluate competitive adsorption between organic micropollutants (OMPs) and between OMPs and fulvic acid, a representative natural organic material (NOM) component found in water systems. Molecular electrostatic surface potential maps showed that grafting agents with aromatic and amine functional groups were found to provide attractive interactions for negatively charged OMPs. In addition, optimization of substitution degree of β-CD is necessary to enhance adsorption of target OMPs. Furthermore, it was found that aromatic ring bearing grafting agents can provide additional electrostatic attractions by π-π interactions with the aromatic ring of the OMPs. The impact of common water quality characteristics on adsorption was assessed and it was revealed that the effect of pH and calcium on adsorption depends on the ionizable functional groups present on the grafting agent. Molecular dynamics simulations showed that adsorption of target OMPs does not solely depend on hydrophobicity but is affected by electrostatic interactions. The simulations revealed that fulvic acid which is commonly present in environmental waters can be a competitor with ibuprofen for the β-CD cavity. Ultimately, this study showed that molecular level simulation can be effectively employed to investigate adsorption of OMPs by β-CD functionalized adsorbents and could be employed to enhance their design and subsequent environmental applications.
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Affiliation(s)
- Ezgi Demircan Ozelcaglayan
- Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, N2L 3G1, Ontario, Canada.
| | - John F Honek
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, N2L 3G1, Ontario, Canada
| | - Wayne J Parker
- Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, N2L 3G1, Ontario, Canada
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Michael AM, Mahmoud AM, Fahmy NM. Determination of Clomipramine using eco-friendly solid-contact ionophore-doped potentiometric sensor. BMC Chem 2023; 17:27. [PMID: 36966337 PMCID: PMC10040110 DOI: 10.1186/s13065-023-00938-x] [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: 10/08/2022] [Accepted: 03/13/2023] [Indexed: 03/27/2023] Open
Abstract
INTRODUCTION Clomipramine is a tricyclic antidepressant acting as a serotonin reuptake inhibitor. Its maximum plasma concentration (Cmax) is 13-310 ng/mL, the therapeutic range is 220-500 ng/mL and its toxic effect appears in doses above 900 ng/mL. OBJECTIVES The fabrication of eco-friendly solid-contact ion-selective electrodes to evaluate the concentration of Clomipramine in different matrices based on disposable screen-printed carbon electrode. METHODS Disposable screen-printed carbon electrode was utilized as a substrate to fabricate the proposed sensors. The sensors were optimized to determine Clomipramine using calix[4]arene as an ionophore into PVC polymeric membrane to enhance selectivity towards the target analyte. The solid-contact sensor potential stability was improved by the incorporation of graphene nanoparticles transducer layer. RESULTS The sensors were assessed as per the IUPAC recommendations. The linearity range was 1 × 10- 2 to 1 × 10- 5.3 M. The sensors were successfully applied to determine CLM in the pharmaceutical formulation. Furthermore, the ion selective electrodes were applied for Clompiramine assay in spiked plasma for the purpose of Point-of-Care testing to be a diagnostic tool for therapeutic monitoring of the cited central nervous system agent. The findings were statistically compared to the reported method showing no statistically significant difference. CONCLUSION This work was concerned with developing a green analytical method for the determination of Clomipramine. The proposed SC-ISE was mixed with graphene nanocomposite transducer interlayer. The graphene layer succeeded in preventing the formation of an aqueous layer so resulted in a stable, reproducible standard potential besides the rapid response time.
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Affiliation(s)
- Adel M Michael
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, October city, Egypt
| | - Amr M Mahmoud
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Nesma M Fahmy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, October city, Egypt
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Current Status of Quantum Chemical Studies of Cyclodextrin Host-Guest Complexes. Molecules 2022; 27:molecules27123874. [PMID: 35744998 PMCID: PMC9229288 DOI: 10.3390/molecules27123874] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/09/2022] [Accepted: 06/13/2022] [Indexed: 12/30/2022] Open
Abstract
This article aims to review the application of various quantum chemical methods (semi-empirical, density functional theory (DFT), second order Møller-Plesset perturbation theory (MP2)) in the studies of cyclodextrin host-guest complexes. The details of applied approaches such as functionals, basis sets, dispersion corrections or solvent treatment methods are analyzed, pointing to the best possible options for such theoretical studies. Apart from reviewing the ways that the computations are usually performed, the reasons for such studies are presented and discussed. The successful applications of theoretical calculations are not limited to the determination of stable conformations but also include the prediction of thermodynamic properties as well as UV-Vis, IR, and NMR spectra. It has been shown that quantum chemical calculations, when applied to the studies of CD complexes, can provide results unobtainable by any other methods, both experimental and computational.
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Yadav S, Misra N, Khanna P, Mansi, Batra K, Khanna L. A DFT Study on Diels-Alder Reaction of Dibenzazepine and 2,5-Dimethylfuran Using Different Solvents and Temperature Conditions. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2056622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Shilpa Yadav
- University School of Basic & Applied Sciences, Guru Gobind Singh Indraprastha University, New Delhi, India
| | - Neeti Misra
- Department of Chemistry, Acharya Narendra Dev College, University of Delhi, New Delhi, India
| | - Pankaj Khanna
- Department of Chemistry, Acharya Narendra Dev College, University of Delhi, New Delhi, India
| | - Mansi
- University School of Basic & Applied Sciences, Guru Gobind Singh Indraprastha University, New Delhi, India
| | - Kriti Batra
- University School of Basic & Applied Sciences, Guru Gobind Singh Indraprastha University, New Delhi, India
| | - Leena Khanna
- University School of Basic & Applied Sciences, Guru Gobind Singh Indraprastha University, New Delhi, India
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Elias E, Zhang AY, Manners MT. Novel Pharmacological Approaches to the Treatment of Depression. Life (Basel) 2022; 12:196. [PMID: 35207483 PMCID: PMC8879976 DOI: 10.3390/life12020196] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/19/2022] [Accepted: 01/23/2022] [Indexed: 12/18/2022] Open
Abstract
Major depressive disorder is one of the most prevalent mental health disorders. Monoamine-based antidepressants were the first drugs developed to treat major depressive disorder. More recently, ketamine and other analogues were introduced as fast-acting antidepressants. Unfortunately, currently available therapeutics are inadequate; lack of efficacy, adverse effects, and risks leave patients with limited treatment options. Efforts are now focused on understanding the etiology of depression and identifying novel targets for pharmacological treatment. In this review, we discuss promising novel pharmacological targets for the treatment of major depressive disorder. Targeting receptors including N-methyl-D-aspartate receptors, peroxisome proliferator-activated receptors, G-protein-coupled receptor 39, metabotropic glutamate receptors, galanin and opioid receptors has potential antidepressant effects. Compounds targeting biological processes: inflammation, the hypothalamic-pituitary-adrenal axis, the cholesterol biosynthesis pathway, and gut microbiota have also shown therapeutic potential. Additionally, natural products including plants, herbs, and fatty acids improved depressive symptoms and behaviors. In this review, a brief history of clinically available antidepressants will be provided, with a primary focus on novel pharmaceutical approaches with promising antidepressant effects in preclinical and clinical studies.
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Affiliation(s)
| | | | - Melissa T. Manners
- Department of Biological Sciences, University of the Sciences, 600 South 43rd Street, Philadelphia, PA 19104, USA; (E.E.); (A.Y.Z.)
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Aree T. Inclusion Scenarios and Conformational Flexibility of the SSRI Paroxetine as Perceived from Polymorphism of β-Cyclodextrin–Paroxetine Complex. Pharmaceuticals (Basel) 2022; 15:ph15010098. [PMID: 35056155 PMCID: PMC8781563 DOI: 10.3390/ph15010098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/07/2022] [Accepted: 01/12/2022] [Indexed: 02/01/2023] Open
Abstract
Depression, a global mental health problem, is prevalent during the coronavirus disease 2019 (COVID-19) pandemic and can be efficiently treated by selective serotonin reuptake inhibitors (SSRIs). Our study series aims at forwarding insights on the β-cyclodextrin (β-CD)–SSRI inclusion complexes by X-ray crystallography combined with density functional theory (DFT) calculation. Here, we report a new crystal form (II) of the 1:1 β-CD–paroxetine (PXT) complex, which is inspired by the reported 2:1 β-CD–PXT complex (crystal form I), reflecting an elusive phenomenon of the polymorphism in CD inclusion complexes. The β-CD–PXT polymorphism stems from the PXT conformational flexibility, which is defined by torsion angles κ, ε around the -CH2–O- group bridging the A- and C–D-rings, of which those of PXT in I and II are totally different. While PXT (II) in an open V-shaped conformation that has the B-ring shallowly inserted in the β-CD cavity, PXT (I) in a closed U-shaped structure is mostly entirely embedded in the β-CD dimeric cavity, of which the A-ring is deeply inserted in the main β-CD cavity. However, PXT molecules in both crystal forms are similarly maintained in the CD cavity via host–guest N–H···O5/O6 H-bonds and C/O–H···π(B/C) interactions and β-CDs have similar 3D arrangements, channel (II) vs. screw-channel (I). Further theoretical explorations on the β-CD–PXT thermodynamic stabilities and the PXT conformational stabilities based on their potential energy surfaces (PESs) have been completed by DFT calculations. The 2:1 β-CD–PXT complex with the greater presence of dispersion interactions is more energetically favorable than the unimolar complex. Conversely, whereas free PXT, PXT (II) and PXT in complex with serotonin transporter are more energetically stable, PXT (I) is least stable and stabilized in the β-CD cavity. As SSRIs could lessen the COVID-19 severity, the CD inclusion complexation not only helps to improve the drug bioavailability, but also promotes the use of antidepressants and COVID-19 medicines concurrently.
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Affiliation(s)
- Thammarat Aree
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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Advancing insights on β-cyclodextrin inclusion complexes with SSRIs through lens of X-ray diffraction and DFT calculation. Int J Pharm 2021; 609:121113. [PMID: 34543619 PMCID: PMC8450047 DOI: 10.1016/j.ijpharm.2021.121113] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/02/2021] [Accepted: 09/15/2021] [Indexed: 01/04/2023]
Abstract
Depression-the global crisis hastened by the coronavirus outbreak, can be efficaciously treated by the selective serotonin reuptake inhibitors (SSRIs). Cyclodextrin (CD) inclusion complexation is a method of choice for reducing side effects and improving bioavailability of drugs. Here, we investigate in-depth the β-CD encapsulation of sertraline (STL) HCl (1) and fluoxetine (FXT) HCl (2) by single-crystal X-ray diffraction and DFT complete-geometry optimization, in comparison to the reported complex of paroxetine (PXT) base. X-ray analysis unveiled the 2:2 β-CD-STL/FXT complexes with two drug molecules inserting their halogen-containing aromatic ring in the β-CD dimeric cavity, which are stabilized by the interplay of intermolecular O2-H⋯N1-H⋯O3 H-bonds, C3/C5-H⋯π and halogen⋯halogen interactions. Similarly, the 1:1 β-CD-tricyclic-antidepressant (TCA) complexes have an exclusive inclusion mode of the aromatic ring, which is maintained by C3/C5-H⋯π interactions. By contrast, the 2:1 β-CD-PXT complex has a total inclusion that is stabilized by host-guest O6-H⋯N1-H⋯O5 H-bonds and C3-H⋯π interactions. The inherent stabilization energies of 1 and 2 evaluated using DFT calculation suggested that the improved thermodynamic stabilities via CD encapsulation facilitates the reduction of drug side effects. Moreover, the SSRI conformational flexibilities are thoroughly discussed for understanding of their pharmacoactivity.
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Belica-Pacha S, Daśko M, Buko V, Zavodnik I, Miłowska K, Bryszewska M. Thermodynamic Studies of Interactions between Sertraline Hydrochloride and Randomly Methylated β-Cyclodextrin Molecules Supported by Circular Dichroism Spectroscopy and Molecular Docking Results. Int J Mol Sci 2021; 22:12357. [PMID: 34830239 PMCID: PMC8620473 DOI: 10.3390/ijms222212357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/12/2021] [Accepted: 11/13/2021] [Indexed: 12/20/2022] Open
Abstract
The interaction between sertraline hydrochloride (SRT) and randomly methylated β-cyclodextrin (RMβCD) molecules have been investigated at 298.15 K under atmospheric pressure. The method used-Isothermal Titration Calorimetry (ITC) enabled to determine values of the thermodynamic functions like the enthalpy (ΔH), the entropy (ΔS) and the Gibbs free energy (ΔG) of binding for the examined system. Moreover, the stoichiometry coefficient of binding (n) and binding/association constant (K) value have been calculated from the experimental results. The obtained outcome was compared with the data from the literature for other non-ionic βCD derivatives interacting with SRT and the enthalpy-entropy compensation were observed and interpreted. Furthermore, the connection of RMβCD with SRT was characterized by circular dichroism spectroscopy (CD) and complexes of βCD derivatives with SRT were characterized through the computational studies with the use of molecular docking (MD).
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Affiliation(s)
- Sylwia Belica-Pacha
- Unit of Biophysical Chemistry, Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 165, 90-236 Lodz, Poland
| | - Mateusz Daśko
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland;
| | - Vyacheslav Buko
- Division of Biochemical Pharmacology, Institute of Biochemistry of Biologically Active Compounds, National Academy of Sciences, BLK-50, 230030 Grodno, Belarus; (V.B.); (I.Z.)
- Department of Biotechnology, School of Medical Sciences, Krakowska 9, 15-875 Bialystok, Poland
| | - Ilya Zavodnik
- Division of Biochemical Pharmacology, Institute of Biochemistry of Biologically Active Compounds, National Academy of Sciences, BLK-50, 230030 Grodno, Belarus; (V.B.); (I.Z.)
- Department of Biochemistry, Yanka Kupala Grodno State University, BLK-50, 230030 Grodno, Belarus
| | - Katarzyna Miłowska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland; (K.M.); (M.B.)
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland; (K.M.); (M.B.)
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Distinctive Supramolecular Features of β-Cyclodextrin Inclusion Complexes with Antidepressants Protriptyline and Maprotiline: A Comprehensive Structural Investigation. Pharmaceuticals (Basel) 2021; 14:ph14080812. [PMID: 34451908 PMCID: PMC8400697 DOI: 10.3390/ph14080812] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/08/2021] [Accepted: 08/16/2021] [Indexed: 12/19/2022] Open
Abstract
Depression, a global mental illness, is worsened due to the coronavirus disease 2019 (COVID-2019) pandemic. Tricyclic antidepressants (TCAs) are efficacious for the treatment of depression, even though they have more side effects. Cyclodextrins (CDs) are powerful encapsulating agents for improving molecular stability, water solubility, and lessening the undesired effects of drugs. Because the atomic-level understanding of the β-CD–TCA inclusion complexes remains elusive, we carried out a comprehensive structural study via single-crystal X-ray diffraction and density functional theory (DFT) full-geometry optimization. Here, we focus on two complexes lining on the opposite side of the β-CD–TCA stability spectrum based on binding constants (Kas) in solution, β-CD–protriptyline (PRT) 1—most stable and β-CD–maprotiline (MPL) 2—least stable. X-ray crystallography unveiled that in the β-CD cavity, the PRT B-ring and MPL A-ring are aligned at a nearly perfect right angle against the O4 plane and primarily maintained in position by intermolecular C–H···π interactions. The increased rigidity of the tricyclic cores is arising from the PRT -CH=CH- bridge widens, and the MPL -CH2–CH2- flexure narrows the butterfly angles, facilitating the deepest and shallower insertions of PRT B-ring (1) and MPL A-ring (2) in the distorted round β-CD cavity for better complexation. This is indicated by the DFT-derived complex stabilization energies (ΔEstbs), although the complex stability orders based on Kas and ΔEstbs are different. The dispersion and the basis set superposition error (BSSE) corrections were considered to improve the DFT results. Plus, the distinctive 3D arrangements of 1 and 2 are discussed. This work provides the first crystallographic evidence of PRT and MPL stabilized in the β-CD cavity, suggesting the potential application of CDs for efficient drug delivery.
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β-Cyclodextrin Inclusion Complexes with Catechol-Containing Antioxidants Protocatechuic Aldehyde and Protocatechuic Acid-An Atomistic Perspective on Structural and Thermodynamic Stabilities. Molecules 2021; 26:molecules26123574. [PMID: 34208150 PMCID: PMC8230902 DOI: 10.3390/molecules26123574] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 11/29/2022] Open
Abstract
Protocatechuic aldehyde (PCAL) and protocatechuic acid (PCAC) are catechol derivatives and have broad therapeutic effects associated with their antiradical activity. Their pharmacological and physicochemical properties have been improved via the cyclodextrin (CD) encapsulation. Because the characteristics of β-CD inclusion complexes with PCAL (1) and PCAC (2) are still equivocal, we get to the bottom of the inclusion complexation by an integrated study of single-crystal X-ray diffraction and DFT full-geometry optimization. X-ray analysis unveiled that PCAL and PCAC are nearly totally shielded in the β-CD wall. Their aromatic rings are vertically aligned in the β-CD cavity such that the functional groups on the opposite side of the ring (3,4-di(OH) and 1-CHO/1-COOH groups) are placed nearby the O6–H and O2–H/O3–H rims, respectively. The preferred inclusion modes in 1 and 2 help to establish crystal contacts of OH⋅⋅⋅O H-bonds with the adjacent β-CD OH groups and water molecules. By contrast, the DFT-optimized structures of both complexes in the gas phase are thermodynamically stable via the four newly formed host–guest OH⋯O H-bonds. The intermolecular OH⋅⋅⋅O H-bonds between PCAL/PCAC 3,4-di(OH) and β-CD O6–H groups, and the shielding of OH groups in the β-CD wall help to stabilize these antioxidants in the β-CD cavity, as observed in our earlier studies. Moreover, PCAL and PCAC in distinct lattice environments are compared for insights into their structural flexibility.
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Caffeine-Cyclodextrin Complexes as Solids: Synthesis, Biological and Physicochemical Characterization. Int J Mol Sci 2021; 22:ijms22084191. [PMID: 33919556 PMCID: PMC8073077 DOI: 10.3390/ijms22084191] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 12/16/2022] Open
Abstract
Mechanochemical and in-solution synthesis of caffeine complexes with α-, β-, and γ-cyclodextrins was optimized. It was found that short-duration, low-energy cogrinding, and evaporation (instead of freeze-drying) are effective methods for the formation and isolation of these complexes. The products obtained, their pure components, and their mixtures were examined by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), FT-IR and Raman spectroscopy. Moreover, molecular modeling provided an improved understanding of the association process between the guest and host molecules in these complexes. The complexes were found to exhibit high toxicity in zebrafish (Danio rerio) embryos, in contrast to pure caffeine and cyclodextrins at the same molar concentrations. HPLC measurements of the caffeine levels in zebrafish embryos showed that the observed cytotoxicity is not caused by an increased caffeine concentration in the body of the organism, as the concentrations are similar regardless of the administered caffeine form. Therefore, the observed high toxicity could be the result of the synergistic effect of caffeine and cyclodextrins.
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