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Theoretical search of crystal polymorphs of temozolomide. Heliyon 2022; 8:e09608. [PMID: 35706947 PMCID: PMC9189895 DOI: 10.1016/j.heliyon.2022.e09608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/19/2022] [Accepted: 05/26/2022] [Indexed: 11/22/2022] Open
Abstract
Possible polymorphic forms of the chemotherapy drug, temozolomide were predicted from the ab initio and DFT methods. The lattice minimization via distributed multipole analysis was carried out for the hypothetical generated structures. A crystal with unit cell parameters close to the real one and of same space group was retrieved, with partly similar packing and interactions. The analysis of inter molecular interaction (through Hirshfeld surface) and electrostatic potential reveals the complementary sites in the molecule. The 26 predicted structures were analyzed with respect to two computed lattice energies and hydrogen-bond propensity. The lattice energy of the real crystal [EXP] packing ranked number 6 compared on the basis of DMACRYS software and number 3 on the basis of the total lattice energy issued from the Crystalexplorer17 software at the B3LYP/6-31G∗∗ level of theory. The molecule has two strong hydrogen bond donors and five strong acceptors. The predicted packings are stabilized by one or two strong N–H…O/N–H…N as well as weak C–H…O/C–H…N and H…π hydrogen bonds. While the real structure with Z’ = 1, EXP, forms only one strong H-bond (N–H…O=C), several of the predicted packings form two strong H-bonds. Two predicted crystal packings have unit cell parameters close to the real structure, one of them shares several common intermolecular interactions.
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Lal S, Snape TJ. A therapeutic update on PARP inhibitors: implications in the treatment of glioma. Drug Discov Today 2020; 26:532-541. [PMID: 33157194 DOI: 10.1016/j.drudis.2020.10.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/07/2020] [Accepted: 10/29/2020] [Indexed: 01/01/2023]
Abstract
Central nervous system (CNS) cancers are among the most aggressive and devastating. Further, due to unavailability of neuro-oncologists and neurosurgeons, the specialized treatment options of CNS cancers are still not completely available in most parts of the world. Among various strategies of inducing death in cancer cells, inhibition of poly(ADP-ribose) polymerase (PARP) has emerged as a beneficial therapy when combined with other anticancer agents. In this review, we provide a detailed therapeutic update of PARP inhibitors that have shown clinical activity against glioma.
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Affiliation(s)
- Samridhi Lal
- Amity Institute of Pharmacy, Amity University, Gurugram, 122413, Haryana, India.
| | - Timothy J Snape
- Leicester School of Pharmacy, De Montfort University, Leicester, LE1 9BH, UK
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Hu D, Ogawa K, Kajiyama M, Enomae T. Characterization of self-assembled silver nanoparticle ink based on nanoemulsion method. ROYAL SOCIETY OPEN SCIENCE 2020; 7:200296. [PMID: 32537225 PMCID: PMC7277254 DOI: 10.1098/rsos.200296] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 04/29/2020] [Indexed: 06/04/2023]
Abstract
A well-dispersed self-assembled silver nanoparticles (AgNPs) ink with high purity was synthesized via AgNO3 emulsion prepared by blending an AgNO3 aqueous solution and a liquid paraffin solution of both polyoxyethylene (20) sorbitan monooleate (Tween 80) and sorbitan monooleate (Span 80). The ink remained as an emulsion at low temperatures; however, it produced AgNPs after sintering at about 60°C and showed a high stability at nanoscale sizes (with diameters ranging 8.6-13.4 nm) and a high conductivity. During the whole procedure, Tween 80 acted as a surfactant, reductant and stabilizer. Presumably, Tween 80 underwent an autoxidation process, where a free radical of an α-carbon of ether oxygen was formed by hydrogen abstraction. The mean diameter of emulsion droplets could be reduced by decreasing water content and increasing the ratio of surfactant and concentration of AgNO3 aqueous solution. Consequently, the thermogravimetric analysis and X-ray diffraction result clarified the purity of the produced Ag0. Dynamic light scattering and ultraviolet-visible spectroscopy clarified that an increased concentration of AgNO3 decreased the particle size.
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Affiliation(s)
- Donghao Hu
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuyoshi Ogawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Mikio Kajiyama
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Toshiharu Enomae
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
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Flavonoids from Brazilian Cerrado: Biosynthesis, Chemical and Biological Profile. Molecules 2019; 24:molecules24162891. [PMID: 31395797 PMCID: PMC6720525 DOI: 10.3390/molecules24162891] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 04/03/2019] [Indexed: 02/07/2023] Open
Abstract
Flavonoids are highly bioactive compounds with very low toxicity, which makes them attractive starting points in drug discovery. This study aims to provide information on plant species containing flavonoids, which are found in the Brazilian Cerrado. First, we present the characterization and plant diversity with emphasis on the families of flavonoid-producing plants, and then we describe the phenylpropanoid pathway which represents the flavonoids’ main route biosynthesis—generally conserved in all species. Chemical structures and biological activities of flavonoids isolated from the Cerrado’s plant species are also described based on examples from the relevant literature studies. Finally, research on the biodiversity of the Cerrado biome should be encouraged, due to the discovery of new sources of flavonoids which can provide several benefits to human health and the possibility of developing new drugs by the pharmaceutical industry.
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Lajous H, Lelièvre B, Vauléon E, Lecomte P, Garcion E. Rethinking Alkylating(-Like) Agents for Solid Tumor Management. Trends Pharmacol Sci 2019; 40:342-357. [PMID: 30979523 DOI: 10.1016/j.tips.2019.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/15/2019] [Accepted: 03/06/2019] [Indexed: 12/20/2022]
Abstract
Although old molecules, alkylating agents and platinum derivatives are still widely used in the treatment of various solid tumors. However, systemic toxicity and cellular resistance mechanisms impede their efficacy. Innovative strategies, including local administration, optimization of treatment schedule/dosage, synergistic combinations, and the encapsulation of bioactive molecules in smart, multifunctional drug delivery systems, have shown promising results in potentiating anticancer activity while circumventing such hurdles. Furthermore, questioning of the old paradigm according to which nuclear DNA is the critical target of their anticancer activity has shed light on subcellular alternative and neglected targets that obviously participate in the mediation of cytotoxicity or resistance. Thus, rethinking of the use of these pivotal antineoplastic agents appears critical to improve clinical outcomes in the management of solid tumors.
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Affiliation(s)
- Hélène Lajous
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France; Center for Education and Research on Macromolecules (CERM), CESAM Research Unit, University of Liege, B6a Sart-Tilman, B-4000 Liege, Belgium
| | - Bénédicte Lelièvre
- Centre Régional de Pharmacovigilance, Laboratoire de Pharmacologie-Toxicologie, CHU Angers, 4 rue Larrey, F-49100 Angers, France
| | - Elodie Vauléon
- Centre Eugène Marquis, Rennes, France; INSERM U1242, Université de Rennes 1, Rennes, France
| | - Philippe Lecomte
- Center for Education and Research on Macromolecules (CERM), CESAM Research Unit, University of Liege, B6a Sart-Tilman, B-4000 Liege, Belgium; Equivalent contribution
| | - Emmanuel Garcion
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France; Equivalent contribution.
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Custodio JM, Vaz WF, de Castro MR, Bernardes A, Naves RF, Moura AF, de Moraes MO, da Silva CC, Martins FT, Perez CN, Napolitano HB. Solvent-driven structural adaptation in a novel anticancer sulfonamide chalcone. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.07.059] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yavuz G, Felgueiras HP, Ribeiro AI, Seventekin N, Zille A, Souto AP. Dyed Poly(styrene-methyl Methacrylate-acrylic Acid) Photonic Nanocrystals for Enhanced Structural Color. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23285-23294. [PMID: 29924594 DOI: 10.1021/acsami.8b03003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present work, we investigated the combined effect of poly(styrene-methyl methacrylate-acrylic acid) [P(St-MMA-AA)] PCs with the disperse dye C.I. Disperse Red 343 on the photonic crystals (PCs) shape, distribution, organization, iridescence, chemical structure, thermal stability, and reflectance. PCs were successfully produced in the form of highly spherical, monodisperse colloidal structures. Presence of dye in the PCs inner core-shell structure was confirmed via Fourier-transformed infrared spectroscopy. The PCs brightness and iridescent effect was enhanced by the presence of the dyestuff, which also promoted the self-assembly of the colloidal nanospheres in the form of arrays. The P(St-MMA-AA) PCs thermal stability did not alter with the introduction of the dye. In a side experiment, dyed PCs were also coated onto dyed polyamide fabrics. Data reported successful coating of the textile fabric and an improvement of its reflectance. Fabric immobilization fostered the self-assembling of the dyed colloidal nanospheres in the form of well-organized face-centered cubic, closed-packed arrays. This is the simplest and most energy favorable organization for PCs. The combination of disperse dyes with PCs is a very recent and challenging idea and could open new ways to understand the influence the PCs photonic-band structure may exert on the photoluminescence properties of the dyes embedded in the PCs inner space, and vice versa.
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Affiliation(s)
- Gonul Yavuz
- Textile and Apparel Research and Application Center , Ege University , 35040 Izmir , Turkey
| | - Helena P Felgueiras
- 2C2T-Centro de Ciência e Tecnologia Têxtil , Universidade do Minho , Campus de Azurém , 4800-058 Guimarães , Portugal
| | - Ana Isabel Ribeiro
- 2C2T-Centro de Ciência e Tecnologia Têxtil , Universidade do Minho , Campus de Azurém , 4800-058 Guimarães , Portugal
| | - Necdet Seventekin
- Faculty of Engineering, Textile Engineering Department , Ege University , 35100 Izmir , Turkey
| | - Andrea Zille
- 2C2T-Centro de Ciência e Tecnologia Têxtil , Universidade do Minho , Campus de Azurém , 4800-058 Guimarães , Portugal
| | - Antonio Pedro Souto
- 2C2T-Centro de Ciência e Tecnologia Têxtil , Universidade do Minho , Campus de Azurém , 4800-058 Guimarães , Portugal
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Di Martino A, Pavelkova A, Maciulyte S, Budriene S, Sedlarik V. Polysaccharide-based nanocomplexes for co-encapsulation and controlled release of 5-Fluorouracil and Temozolomide. Eur J Pharm Sci 2016; 92:276-86. [DOI: 10.1016/j.ejps.2016.05.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/09/2016] [Accepted: 05/02/2016] [Indexed: 12/17/2022]
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Hydrogen bonded and stacked geometries of the temozolomide dimer. J Mol Model 2016; 22:77. [PMID: 26971506 DOI: 10.1007/s00894-016-2934-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 02/17/2016] [Indexed: 10/22/2022]
Abstract
Dispersion-corrected density functional theory (DFT) and MP2 quantum chemical methods are used to examine homodimers of temozolomide (TMZ). Of the 12 dimer configurations found to be minima, the antarafacial stacked dimer is the most favored, it is lower in energy than coplanar dimers which are stabilized by H-bonds. The comparison between B3LYP and B3LYP-D binding energies points to dispersion as a primary factor in stabilizing the stacked geometries. CO(π) → CO(π*) charge transfers between amide groups in the global minimum are identified by NBO, as well as a pair of weak CH∙∙N H-bonds. AIM analysis of the electron density provides an alternative description which includes N∙∙O, N∙∙N, and C∙∙C noncovalent bonds.
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Mirzaei S, Khalilian MH, Taherpour AA. Mechanistic study of the hydrolytic degradation and protonation of temozolomide. RSC Adv 2015. [DOI: 10.1039/c5ra04680g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two pathways for the degradation of the anticancer agent, temozolomide, were investigated, in which the most energy-favoured mechanism was a combination of the two possible pathways.
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Affiliation(s)
| | | | - Avat Arman Taherpour
- Faculty of Chemistry
- Razi University
- Kermanshah
- Iran
- Medical Biology Research Center
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The medicinal chemistry of imidazotetrazine prodrugs. Pharmaceuticals (Basel) 2014; 7:797-838. [PMID: 25014631 PMCID: PMC4113733 DOI: 10.3390/ph7070797] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 02/02/2023] Open
Abstract
Temozolomide (TMZ) is the standard first line treatment for malignant glioma, reaching “blockbuster” status in 2010, yet it remains the only drug in its class. The main constraints on the clinical effectiveness of TMZ therapy are its requirement for active DNA mismatch repair (MMR) proteins for activity, and inherent resistance through O6-methyl guanine-DNA methyl transferase (MGMT) activity. Moreover, acquired resistance, due to MMR mutation, results in aggressive TMZ-resistant tumour regrowth following good initial responses. Much of the attraction in TMZ as a drug lies in its PK/PD properties: it is acid stable and has 100% oral bioavailability; it also has excellent distribution properties, crosses the blood-brain barrier, and there is direct evidence of tumour localisation. This review seeks to unravel some of the mysteries of the imidazotetrazine class of compounds to which TMZ belongs. In addition to an overview of different synthetic strategies, we explore the somewhat unusual chemical reactivity of the imidazotetrazines, probing their mechanisms of reaction, examining which attributes are required for an active drug molecule and reviewing the use of this combined knowledge towards the development of new and improved anti-cancer agents.
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