1
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Vishakantegowda AG, Girmay BS, Shin JS, Lee JY, Ahn S, Jung YS. Discovery of (E)-2-(hydroxyimino)-N-(2 ((4methylpentyl)amino)ethyl)acetamide (KR-27425) as a non-pyridinium oxime reactivator of paraoxon-inhibited acetylcholinesterase. Bioorg Med Chem Lett 2023; 96:129504. [PMID: 37838342 DOI: 10.1016/j.bmcl.2023.129504] [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: 08/11/2023] [Revised: 09/26/2023] [Accepted: 10/07/2023] [Indexed: 10/16/2023]
Abstract
This study aimed to explore non-pyridinium oxime acetylcholinesterase (AChE) reactivators that could hold the potential to overcome the limitations of the currently available compounds used in the clinic to treat the neurologic manifestations induced by intoxication with organophosphorus agents. Fifteen compounds with various non-pyridinium oxime moieties were evaluated for AChE activity at different concentrations, including aldoximes, ketoximes, and α-ketoaldoximes. The therapeutic potential of the oxime compounds was evaluated by assessing their ability to reactivate AChE inhibited by paraoxon. Among the tested compounds, α-Ketoaldoxime derivative 13 showed the highest reactivation (%) reaching 67 % and 60 % AChE reactivation when evaluated against OP-inhibited electric eel AChE at concentrations of 1,000 and 100 μM, respectively. Compound 13 showed a comparable reactivation ability of AChE (60 %) compared to that of pralidoxime (56 %) at concentrations of 100 μM. Molecular docking simulation of the most active compounds 12 and 13 was conducted to predict the binding mode of the reactivation of electric eel AChE. As a result, a non-pyridinium oxime moiety 13, is a potential reactivator of OP-inhibited AChE and is taken as a lead compound for the development of novel AChE reactivators with enhanced capacity to freely cross the blood-brain barrier.
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Affiliation(s)
- Avinash G Vishakantegowda
- Division of Bio and Drug Discovery, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea; Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, Republic of Korea
| | - Berehe Solomon Girmay
- Division of Bio and Drug Discovery, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea; Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, Republic of Korea
| | - Jin Soo Shin
- Division of Bio and Drug Discovery, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Joo-Youn Lee
- Division of Bio and Drug Discovery, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Sunjoo Ahn
- Division of Bio and Drug Discovery, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Young-Sik Jung
- Division of Bio and Drug Discovery, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea; Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, Republic of Korea.
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2
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Prchalova E, Sukupova M, Malinak D, Andrys R, Sivak L, Pekarik V, Skarka A, Svobodova J, Prchal L, Fresser L, Heger Z, Musilek K. BODIPY-labelled acetylcholinesterase reactivators can be encapsulated into ferritin nanovehicles for enhanced bioavailability in the CNS. Biomed Pharmacother 2023; 167:115490. [PMID: 37722189 DOI: 10.1016/j.biopha.2023.115490] [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: 07/01/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 09/20/2023] Open
Abstract
The BODIPY-labelled oxime reactivator was prepared and used to study its biodistribution into central nervous system. The newly synthesized oxime was found to be weak inhibitor of acetylcholinesterase and strong inhibitor of butyrylcholinesterase. Its reactivation ability for organophosphate inhibited acetylcholinesterase was found similar to a parent oxime. The BODIPY-labelled oxime was further encapsulated into recombinant human H-ferritin and evaluated in vitro and in vivo. The oxime or encapsulated oxime were found to be bioaccumulated primarily in liver and kidneys of mice, but some amount was distributed also to the brain, where it was detectable even after 24 h. The BODIPY-labelled oxime encapsulated to human H-ferritin showed better CNS bioaccumulation and tissue retention at 8 and 24 h time points compared to free oxime, although the fluorescence results might be biased due to BODIPY metabolites identified in tissue homogenates. Taken together, the study demonstrates the first utilization of recombinant ferritins for changing the unfavourable pharmacokinetics of oxime reactivators and brings promising results for follow-up studies.
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Affiliation(s)
- Eliska Prchalova
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Martina Sukupova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, CZ-625 00 Brno, Czech Republic
| | - David Malinak
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic; University Hospital in Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Rudolf Andrys
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Ladislav Sivak
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Vladimir Pekarik
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Adam Skarka
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Jana Svobodova
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Lukas Prchal
- University Hospital in Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Lukas Fresser
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
| | - Kamil Musilek
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic.
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Kapitanov IV, Špulák M, Pour M, Soukup O, Marek J, Jun D, Novak M, Diz de Almeida JSF, França TCC, Gathergood N, Kuča K, Karpichev Y. Sustainable ionic liquids-based molecular platforms for designing acetylcholinesterase reactivators. Chem Biol Interact 2023; 385:110735. [PMID: 37802409 DOI: 10.1016/j.cbi.2023.110735] [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: 07/19/2023] [Revised: 09/09/2023] [Accepted: 09/25/2023] [Indexed: 10/10/2023]
Abstract
We report a green chemistry approach for preparation of oxime-functionalized ILs as AChE reactivators: amide/ester linked IL, l-alanine, and l-phenylalanine derived salts bearing pyridinium aldoxime moiety. The reactivation capacities of the novel oximes were evaluated towards AChE inhibited by typical toxic organophosphates, sarin (GB), VX, and paraoxon (PON). The studied compounds are mostly non-toxic up to the highest concentrations screened (2 mM) towards Gram-negative and Gram-positive bacteria cell lines and both filamentous fungi and yeasts in the in vitro screening experiments as well as towards the eukaryotic cell (CHO-K1 cell line). Introduction of the oxime moiety in initially biodegradable structure decreases its ability to biodegradation. The compound 3d was shown to reveal remarkable activity against the AChE inhibited by VX, exceeding conventional reactivators 2-PAM and obidoxime. The regularities on antidotal activity, cell viability, plasma stability, biodegradability as well as molecular docking study of the newly synthesized oximes will be used for further improvement of their structures.
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Affiliation(s)
- Illia V Kapitanov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia Tee 15, 12618 Tallinn, Estonia
| | - Marcel Špulák
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Kralove, Czech Republic
| | - Milan Pour
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Kralove, Czech Republic
| | - Ondřej Soukup
- Biomedical Research Center, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Jan Marek
- Biomedical Research Center, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; Department of Epidemiology, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Daniel Jun
- Department of Epidemiology, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Martin Novak
- Biomedical Research Center, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Joyce S F Diz de Almeida
- Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Military Institute of Engineering, Rio de Janeiro, RJ, Brazil
| | - Tanos C C França
- Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Military Institute of Engineering, Rio de Janeiro, RJ, Brazil; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Nicholas Gathergood
- School of Chemistry, College of Science, University of Lincoln, Lincoln LN6 7TS, UK
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic.
| | - Yevgen Karpichev
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia Tee 15, 12618 Tallinn, Estonia.
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Prchalova E, Kohoutova Z, Knittelova K, Malinak D, Musilek K. Strategies for enhanced bioavailability of oxime reactivators in the central nervous system. Arch Toxicol 2023; 97:2839-2860. [PMID: 37642747 DOI: 10.1007/s00204-023-03587-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 08/10/2023] [Indexed: 08/31/2023]
Abstract
Oxime reactivators of acetylcholinesterase are commonly used to treat highly toxic organophosphate poisoning. They are effective nucleophiles that can restore the catalytic activity of acetylcholinesterase; however, their main limitation is the difficulty in crossing the blood-brain barrier (BBB) because of their strongly hydrophilic nature. Various approaches to overcome this limitation and enhance the bioavailability of oxime reactivators in the CNS have been evaluated; these include structural modifications, conjugation with molecules that have transporters in the BBB, bypassing the BBB through intranasal delivery, and inhibition of BBB efflux transporters. A promising approach is the use of nanoparticles (NPs) as the delivery systems. Studies using mesoporous silica nanomaterials, poly (L-lysine)-graft-poly(ethylene oxide) NPs, metallic organic frameworks, poly(lactic-co-glycolic acid) NPs, human serum albumin NPs, liposomes, solid lipid NPs, and cucurbiturils, have shown promising results. Some NPs are considered as nanoreactors for organophosphate detoxification; these combine bioscavengers with encapsulated oximes. This study provides an overview and critical discussion of the strategies used to enhance the bioavailability of oxime reactivators in the central nervous system.
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Affiliation(s)
- Eliska Prchalova
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic
| | - Zuzana Kohoutova
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic
| | - Karolina Knittelova
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic
| | - David Malinak
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic.
- Biomedical Research Centre, University Hospital in Hradec Kralove, Sokolska 581, 500 05, Hradec Kralove, Czech Republic.
| | - Kamil Musilek
- Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic.
- Biomedical Research Centre, University Hospital in Hradec Kralove, Sokolska 581, 500 05, Hradec Kralove, Czech Republic.
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Kuca K, Valle da Silva JA, Nepovimova E, Pham NL, Wu W, Valis M, Wu Q, França TCC. Pralidoxime-like reactivator with increased lipophilicity - Molecular modeling and in vitro study. Chem Biol Interact 2023; 385:110734. [PMID: 37788753 DOI: 10.1016/j.cbi.2023.110734] [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: 07/09/2023] [Revised: 08/23/2023] [Accepted: 09/25/2023] [Indexed: 10/05/2023]
Abstract
Acetylcholinesterase (AChE, EC 3.1.1.7) reactivators (2-PAM, trimedoxime, obidoxime, asoxime) have become an integral part of antidotal treatment in cases of nerve agent and organophosphorus (OP) pesticide poisonings. They are often referred to as specific antidotes due to their ability to restore AChE function when it has been covalently inhibited by an OP compound. Currently available commercial reactivators exhibit limited ability to penetrate the blood-brain barrier, where reactivation of inhibited AChE is crucial. Consequently, there have been numerous efforts to discover more brain-penetrating AChE reactivators. In this study, we examined a derivative of 2-PAM designed to possess increased lipophilicity. This enhanced lipophilicity was achieved through the incorporation of a benzyl group into its molecular structure. Initially, a molecular modeling study was conducted, followed by a comparison of its reactivation efficacy with that of 2-PAM against 10 different AChE inhibitors in vitro. Unfortunately, this relatively significant structural modification of 2-PAM resulted in a decrease in its reactivation potency. Consequently, this derivative cannot be considered as a broad-spectrum AChE reactivator.
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Affiliation(s)
- Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic; Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.
| | - Jorge Alberto Valle da Silva
- Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Military Institute of Engineering, Rio de Janeiro/RJ, Brazil
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Ngoc Lam Pham
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Wenda Wu
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic; School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, China
| | - Martin Valis
- Department of Neurology, University Hospital Hradec Kralove, Hradec Kralove, 500 05, Czech Republic
| | - Qinghua Wu
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic; College of Life Science, Yangtze University, Jingzhou, Hubei, China
| | - Tanos Celmar Costa França
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic; Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.
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6
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Baghersad MH, Habibi A, Dehdashti Nejad A. Novel uncharged triazole salicylaldoxime derivatives as potential acetylcholinesterase reactivators: comprehensive computational study, synthesis and in vitro evaluation. RSC Adv 2023; 13:28527-28541. [PMID: 37780731 PMCID: PMC10534079 DOI: 10.1039/d3ra05658a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 09/19/2023] [Indexed: 10/03/2023] Open
Abstract
The present study aims to design and synthesise novel uncharged aldoximes and explore their reactivation abilities, structures, descriptors, and mechanisms of action, as well as assessing the interactions and stabilities in the active site of paraoxon-inhibited acetylcholinesterase enzyme using computational studies and in vitro assay. The comprehensive computational studies including quantum chemical, molecular dynamics simulations and molecular docking were conducted on paraoxon-inhibited human acetylcholinesterase to investigate the reactivation ability of the novel aldoximes and compare them with pralidoxime as a reactivator model molecule.
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Affiliation(s)
- Mohammad Hadi Baghersad
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences Tehran Iran
| | - Azizollah Habibi
- Faculty of Chemistry, Kharazmi University No. 43, P. Code 15719-14911, Mofatteh Street, Enghelab Ave. Tehran Iran
| | - Arash Dehdashti Nejad
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences Tehran Iran
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Jaćević V, Dumanović J, Grujić-Milanović J, Milovanović Z, Amidžić L, Vojinović N, Nežić L, Marković B, Dobričić V, Milosavljević P, Nepovimova E, Kuča K. Oxidative stress status assessment of rats' brains injury following subacute exposure to K-oximes. Chem Biol Interact 2023; 383:110658. [PMID: 37572873 DOI: 10.1016/j.cbi.2023.110658] [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: 06/28/2023] [Revised: 07/29/2023] [Accepted: 08/09/2023] [Indexed: 08/14/2023]
Abstract
Oxidative stress status and morphological injuries in the brain of Wistar rats induced by repeated application of selected acetylcholinesterase reactivators - asoxime, obidoxime, K027, K048, K074, and K075 were evaluated. Each oxime in a dose of 0.1 of LD50/kg im was given 2x/week for 4 weeks. Markers of lipid peroxidation (malondialdehyde, MDA), and protein oxidation (advanced oxidation protein products, AOPP), as well as the activity of antioxidant enzymes (catalase, CAT, superoxide dismutase, SOD, glutathione reductase, GR, and glutathione peroxidase, GPx), were estimated in the brain tissue homogenates on day 35 of the study. Brain alterations were carefully quantified by semiquantitative grading scales - brain damage score (BDS). Oxidative stress parameters, MDA and AOPP were significantly highest in the asoxime-, obidoxime- and K075-treated groups (p < 0.001). The activity of SOD and CAT was significantly elevated in the obidoxime-, K048-, and K075-treated groups (p < 0.001). Besides, GR was markedly decreased in the obidoxime- and K074-treated groups (p < 0.01), while treatment with K048, K074 and K075 induced extremely high elevation in GPx levels (p < 0.001). In the same groups of rats, brain alterations associated with polymorphonuclear cell infiltrate were significantly more severe than those observed in animals receiving only asoxime or K027 (p < 0.001). The presented results confirmed that treatment with different oximes significantly improved the oxidative status and attenuated signs of inflammation in rats' brains. Presented results, together with our previously published data can help to predict likely adverse systemic toxic effects, and target organ systems, which are crucial for establishing risk categories, as well as in dose selection of K-oximes as drug candidates.
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Affiliation(s)
- Vesna Jaćević
- Department for Experimental Toxicology and Pharmacology, National Poison Control Centre, Military Medical Academy, Crnotravska 17, 11000, Belgrade, Serbia; Medical Faculty of the Military Medical Academy, University of Defence, Crnotravska 17, 11000, Belgrade, Serbia; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic.
| | - Jelena Dumanović
- Medical Faculty of the Military Medical Academy, University of Defence, Crnotravska 17, 11000, Belgrade, Serbia; University of Belgrade - Faculty of Chemistry, Department of Analytical Chemistry Studenski trg 16, 11000, Belgrade, Serbia
| | - Jelica Grujić-Milanović
- University of Belgrade - Institute for Medical Research, National Institute of the Republic of Serbia, Department for Cardiovascular Research, Dr Subotića 4, 11 000, Belgrade, Serbia
| | - Zoran Milovanović
- Special Police Unit, Ministry of Interior, Trebevićka 12/A, 11 030, Belgrade, Serbia
| | - Ljiljana Amidžić
- Centre for Biomedical Research, Faculty of Medicine, University of Banja Luka, Save Mrkalja 14, 78000, Banja Luka, Bosnia and Herzegovina; Department of Human Genetics, Faculty of Medicine, University of Banja Luka, Save Mrkalja 14, 78000, Banja Luka, Bosnia and Herzegovina
| | - Nataša Vojinović
- Centre for Biomedical Research, Faculty of Medicine, University of Banja Luka, Save Mrkalja 14, 78000, Banja Luka, Bosnia and Herzegovina
| | - Lana Nežić
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Banja Luka, Save Mrkalja 14, 78000, Banja Luka, Bosnia and Herzegovina
| | - Bojan Marković
- University of Belgrade - Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Vojvode Stepe 450, 11000, Belgrade, Serbia
| | - Vladimir Dobričić
- University of Belgrade - Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Vojvode Stepe 450, 11000, Belgrade, Serbia
| | - Petar Milosavljević
- Veterinary Services Center, Military Health Department, Crnotravska 17, 11000, Belgrade, Serbia
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Kralove, Czech Republic; Biomedical Research Center, University Hospital Hradec Kralove, 50005, Hradec Kralove, Czech Republic
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Pampalakis G, Kostoudi S. Chemical, Physical, and Toxicological Properties of V-Agents. Int J Mol Sci 2023; 24:ijms24108600. [PMID: 37239944 DOI: 10.3390/ijms24108600] [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: 04/12/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
V-agents are exceedingly toxic organophosphate nerve agents. The most widely known V-agents are the phosphonylated thiocholines VX and VR. Nonetheless, other V-subclasses have been synthesized. Here, a holistic overview of V-agents is provided, where these compounds have been categorized based on their structures to facilitate their study. A total of seven subclasses of V-agents have been identified, including phospho(n/r)ylated selenocholines and non-sulfur-containing agents, such as VP and EA-1576 (EA: Edgewood Arsenal). Certain V-agents have been designed through the conversion of phosphorylated pesticides to their respective phosphonylated analogs, such as EA-1576 derived from mevinphos. Further, this review provides a description of their production, physical properties, toxicity, and stability during storage. Importantly, V-agents constitute a percutaneous hazard, while their high stability ensures the contamination of the exposed area for weeks. The danger of V-agents was highlighted in the 1968 VX accident in Utah. Until now, VX has been used in limited cases of terrorist attacks and assassinations, but there is an increased concern about potential terrorist production and use. For this reason, studying the chemistry of VX and other less-studied V-agents is important to understand their properties and develop potential countermeasures.
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Affiliation(s)
- Georgios Pampalakis
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Stavroula Kostoudi
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Jokanović M, Oleksak P, Kuca K. Multiple neurological effects associated with exposure to organophosphorus pesticides in man. Toxicology 2023; 484:153407. [PMID: 36543276 DOI: 10.1016/j.tox.2022.153407] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/02/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022]
Abstract
This article reviews available data regarding the possible association of organophosphorus (OP) pesticides with neurological disorders such as dementia, attention deficit hyperactivity disorder, neurodevelopment, autism, cognitive development, Parkinson's disease and chronic organophosphate-induced neuropsychiatric disorder. These effects mainly develop after repeated (chronic) human exposure to low doses of OP. In addition, three well defined neurotoxic effects in humans caused by single doses of OP compounds are discussed. Those effects are the cholinergic syndrome, the intermediate syndrome and organophosphate-induced delayed polyneuropathy. Usually, the poisoning can be avoided by an improved administrative control, limited access to OP pesticides, efficient measures of personal protection and education of OP pesticide applicators and medical staff.
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Affiliation(s)
- Milan Jokanović
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech republic
| | - Patrik Oleksak
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech republic
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech republic; Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech republic.
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10
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Santos MC, Botelho FD, Gonçalves AS, Kitagawa DAS, Borges CVN, Carvalho-Silva T, Bernardo LB, Ferreira CN, Rodrigues RB, Ferreira Neto DC, Nepovimova E, Kuča K, LaPlante SR, Lima ALS, França TCC, Cavalcante SFA. Are the current commercially available oximes capable of reactivating acetylcholinesterase inhibited by the nerve agents of the A-series? Arch Toxicol 2022; 96:2559-2572. [PMID: 35666269 DOI: 10.1007/s00204-022-03316-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 05/11/2022] [Indexed: 12/20/2022]
Abstract
The misuse of novichok agents in assassination attempts has been reported in the international media since 2018. These relatively new class of neurotoxic agents is claimed to be more toxic than the agents of the G and V series and so far, there is no report yet in literature about potential antidotes against them. To shed some light into this issue, we report here the design and synthesis of NTMGMP, a surrogate of A-242 and also the first surrogate of a novichok agent useful for experimental evaluation of antidotes. Furthermore, the efficiency of the current commercial oximes to reactivate NTMGMP-inhibited acetylcholinesterase (AChE) was evaluated. The Ellman test was used to confirm the complete inhibition of AChE, and to compare the subsequent rates of reactivation in vitro as well as to evaluate aging. In parallel, molecular docking, molecular dynamics and MM-PBSA studies were performed on a computational model of the human AChE (HssAChE)/NTMGMP complex to assess the reactivation performances of the commercial oximes in silico. Experimental and theoretical studies matched the exact hierarchy of efficiency and pointed to trimedoxime as the most promising commercial oxime for reactivation of AChE inhibited by A-242.
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Affiliation(s)
- Marcelo C Santos
- Laboratory of Molecular Modeling Applied to Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Fernanda D Botelho
- Laboratory of Molecular Modeling Applied to Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Arlan S Gonçalves
- Federal Institute of Education, Science and Technology of Espírito Santo - Units Vila Velha and Vitória, Vitória, ES, Brazil.,Federal University of Espírito Santo, Unit Goiabeiras, Vitória, ES, Brazil
| | - Daniel A S Kitagawa
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil
| | - Caio V N Borges
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil.,Chemical Engineering Department, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Taynara Carvalho-Silva
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil.,Chemical Engineering Department, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Leandro B Bernardo
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil.,Chemical Engineering Department, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Cíntia N Ferreira
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil
| | - Rafael B Rodrigues
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil
| | - Denise C Ferreira Neto
- Chemical Engineering Department, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Steven R LaPlante
- Université de Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, H7V 1B7, Canada
| | - Antonio L S Lima
- Chemical Engineering Department, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Tanos C C França
- Laboratory of Molecular Modeling Applied to Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, Brazil. .,Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic. .,Université de Québec, INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, H7V 1B7, Canada.
| | - Samir F A Cavalcante
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Rio de Janeiro, Brazil. .,Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.
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11
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Countermeasures in organophosphorus intoxication: pitfalls and prospects. Trends Pharmacol Sci 2022; 43:593-606. [DOI: 10.1016/j.tips.2022.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/14/2022] [Accepted: 04/17/2022] [Indexed: 11/24/2022]
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12
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Zhang Y, Li T, Zhang Y, Sun X, Liu H, Wang Y, Nie Z. Acetylcholinesterase-capped mesoporous silica gated switches for selective detection of high-toxicity organophosphate compounds. Anal Chim Acta 2022; 1207:339708. [DOI: 10.1016/j.aca.2022.339708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 03/06/2022] [Accepted: 03/08/2022] [Indexed: 11/25/2022]
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13
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Methylene blue can act as an antidote to pesticide poisoning of bumble bee mitochondria. Sci Rep 2021; 11:14710. [PMID: 34282204 PMCID: PMC8289979 DOI: 10.1038/s41598-021-94231-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/07/2021] [Indexed: 11/09/2022] Open
Abstract
The population of bumble bees and other pollinators has considerably declined worldwide, probably, due to the toxic effect of pesticides used in agriculture. Inexpensive and available antidotes can be one of the solutions for the problem of pesticide toxicity for pollinators. We studied the properties of the thiazine dye Methylene blue (MB) as an antidote against the toxic action of pesticides in the bumble bee mitochondria and found that MB stimulated mitochondrial respiration mediated by Complex I of the electron transport chain (ETC) and increased respiration of the mitochondria treated with mitochondria-targeted (chlorfenapyr, hydramethylnon, pyridaben, tolfenpyrad, and fenazaquin) and non-mitochondrial (deltamethrin, metribuzin, and penconazole) pesticides. MB also restored the mitochondrial membrane potential dissipated by the pesticides affecting the ETC. The mechanism of MB action is most probably related to its ability to shunt electron flow in the mitochondrial ETC.
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14
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De Boer D, Nguyen N, Mao J, Moore J, Sorin EJ. A Comprehensive Review of Cholinesterase Modeling and Simulation. Biomolecules 2021; 11:580. [PMID: 33920972 PMCID: PMC8071298 DOI: 10.3390/biom11040580] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/08/2021] [Accepted: 04/11/2021] [Indexed: 01/18/2023] Open
Abstract
The present article reviews published efforts to study acetylcholinesterase and butyrylcholinesterase structure and function using computer-based modeling and simulation techniques. Structures and models of both enzymes from various organisms, including rays, mice, and humans, are discussed to highlight key structural similarities in the active site gorges of the two enzymes, such as flexibility, binding site location, and function, as well as differences, such as gorge volume and binding site residue composition. Catalytic studies are also described, with an emphasis on the mechanism of acetylcholine hydrolysis by each enzyme and novel mutants that increase catalytic efficiency. The inhibitory activities of myriad compounds have been computationally assessed, primarily through Monte Carlo-based docking calculations and molecular dynamics simulations. Pharmaceutical compounds examined herein include FDA-approved therapeutics and their derivatives, as well as several other prescription drug derivatives. Cholinesterase interactions with both narcotics and organophosphate compounds are discussed, with the latter focusing primarily on molecular recognition studies of potential therapeutic value and on improving our understanding of the reactivation of cholinesterases that are bound to toxins. This review also explores the inhibitory properties of several other organic and biological moieties, as well as advancements in virtual screening methodologies with respect to these enzymes.
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Affiliation(s)
- Danna De Boer
- Department of Chemistry & Biochemistry, California State University, Long Beach, CA 90840, USA;
| | - Nguyet Nguyen
- Department of Chemical Engineering, California State University, Long Beach, CA 90840, USA; (N.N.); (J.M.)
| | - Jia Mao
- Department of Chemical Engineering, California State University, Long Beach, CA 90840, USA; (N.N.); (J.M.)
| | - Jessica Moore
- Department of Biomedical Engineering, California State University, Long Beach, CA 90840, USA;
| | - Eric J. Sorin
- Department of Chemistry & Biochemistry, California State University, Long Beach, CA 90840, USA;
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15
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Development of versatile and potent monoquaternary reactivators of acetylcholinesterase. Arch Toxicol 2021; 95:985-1001. [PMID: 33517499 DOI: 10.1007/s00204-021-02981-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/06/2021] [Indexed: 12/15/2022]
Abstract
To date, the only treatments developed for poisoning by organophosphorus compounds, the most toxic chemical weapons of mass destruction, have exhibited limited efficacy and versatility. The available causal antidotes are based on reactivation of the enzyme acetylcholinesterase (AChE), which is rapidly and pseudo-irreversibly inhibited by these agents. In this study, we developed a novel series of monoquaternary reactivators combining permanently charged moieties tethered to position 6- of 3-hydroxypyridine-2-aldoxime reactivating subunit. Highlighted representatives (21, 24, and 27; also coded as K1371, K1374, and K1375, respectively) that contained 1-phenylisoquinolinium, 7-amino-1-phenylisoquinolinium and 4-carbamoylpyridinium moieties as peripheral anionic site ligands, respectively, showed efficacy superior or comparable to that of the clinically used standards. More importantly, these reactivators exhibited wide-spectrum efficacy and were minutely investigated via determination of their reactivation kinetics in parallel with molecular dynamics simulations to study their mechanisms of reactivation of the tabun-inhibited AChE conjugate. To further confirm the potential applicability of these candidates, a mouse in vivo assay was conducted. While K1375 had the lowest acute toxicity and the most suitable pharmacokinetic profile, the oxime K1374 with delayed elimination half-life was the most effective in ameliorating the signs of tabun toxicity. Moreover, both in vitro and in vivo, the versatility of the agents was substantially superior to that of clinically used standards. Their high efficacy and broad-spectrum capability make K1374 and K1375 promising candidates that should be further investigated for their potential as nerve agents and insecticide antidotes.
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16
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Thakur A, Patil P, Sharma A, Flora S. Advances in the Development of Reactivators for the Treatment of Organophosphorus Inhibited Cholinesterase. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999201020203544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Organophosphorus Compounds (OPCs) are used as pesticides to control pest, as
chemical weapons in military conflict and unfortunately in the terrorist attack. These compounds
are irreversible inhibitors of acetylcholinesterase, resulting in the accumulation of
acetylcholine that leads to severe health complications which may be ended with the death of
the victim. Current antidotes used for reactivation of organophosphorus inhibited acetylcholinesterase
(OP-AChE) are not able to cross the blood-brain barrier efficiently, therefore being
incapable to reactivate OP-AChE of the central nervous system. Due to limitations with
current antidotes, there is an urgent need for new effective antidotes that could be included in
the treatment regimen of OP poisoning. In this direction, comprehensive work has been done
to improve the permeability of existing antidotes using a variety of strategies that include
synthesis of oxime bonded to peripheral site binding moiety via an alkyl, aryl, or heteroatom-containing linker, synthesis
of sugar oximes, and prodrug of 2-PAM, incorporating fluorine and chlorine in the structure of charged oximes.
Other classes of compounds such as the mannich base, N-substituted hydroxyimino acetamide, alkylating
agents, have been investigated for reactivation of OP-AChE. This review comprises the development of various
classes of reactivators with the aim of either enhancing blood-brain permeability of existing antidotes or discovering
a new class of reactivators.
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Affiliation(s)
- Ashima Thakur
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Raebareli, India
| | - Pooja Patil
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Raebareli, India
| | - Abha Sharma
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Raebareli, India
| | - S.J.S. Flora
- Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli, India
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17
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Abbasi-Jorjandi M, Asadikaram G, Abolhassani M, Fallah H, Abdollahdokht D, Salimi F, Faramarz S, Pournamdari M. Pesticide exposure and related health problems among family members of farmworkers in southeast Iran. A case-control study. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115424. [PMID: 32866869 DOI: 10.1016/j.envpol.2020.115424] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 08/06/2020] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Pesticides used in agriculture are some of the most common pollutants in the world. This study aimed to investigate the effects of Organophosphorus Pesticides (OPPs) and Organochlorine Pesticides (OCPs) on the families of farmworkers in the southeast of Iran. METHODS In the present case-control study, 141 family members of farmworkers (as the case group) and 59 family members of non-farmworkers (as the controls) were recruited. Serum levels of OCPs such as α-HCH, β-HCH, γ-HCH, 2,4-DDE, 4,4-DDE, 2,4-DDT, and 4,4-DDT were determined. In addition, erythrocyte acetylcholinesterase (AChE) activity, malondialdehyde (MDA), total antioxidant capacity (TAC), protein carbonyl (PC), nitric oxide (NO) serum levels, arylesterase activity of paraoxonase 1 (PON-1), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) activity were determined in all participants. Furthermore, distance to farmlands, education, crops, type, and the number of consumed fruits were evaluated for each individual separately. RESULTS The erythrocyte AChE activity and serum activities of GPx, SOD, and PON-1 and TAC levels were significantly decreased, whereas the concentration of MDA, PC, NO, and seven OCPs were significantly increased in the farmworkers' families as compared to the controls. Spearman correlation and linear regression suggest that OCPs increase the oxidative stress in farmworkers' family members. Moreover, distance, education, farming precedence, products, and ventilation had significant effects on the OCP levels and increased the odds ratio of OCP levels in farmworkers' families. CONCLUSION With regards to the data obtained in this study, it was revealed that OCPs as illegal pesticides and OPPs were higher than expected in the farmworkers' family members. Furthermore, exposure to OCPs and OPPs, apart from the other effects on the body, leads to oxidative stress (OS) that may cause serious diseases in the exposed populations.
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Affiliation(s)
- Mojtaba Abbasi-Jorjandi
- Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman, Iran; Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Gholamreza Asadikaram
- Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran; Neuroscience Research Center, Institute of Neuropharmacology, School of Medicine, Kerman University of Medical Sciences, Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman, Iran.
| | - Moslem Abolhassani
- Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran; Physiology Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Hossein Fallah
- Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Danial Abdollahdokht
- Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Fouzieh Salimi
- Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Sanaz Faramarz
- Department of Clinical Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mostafa Pournamdari
- Pharmaceutics Research Center, Department of Medical Chemistry, School of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
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18
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Gambino A, Burnett JC, Koide K. Methyl Scanning and Revised Binding Mode of 2-Pralidoxime, an Antidote for Nerve Agent Poisoning. ACS Med Chem Lett 2020; 11:1893-1898. [PMID: 33062170 DOI: 10.1021/acsmedchemlett.9b00586] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/09/2020] [Indexed: 12/18/2022] Open
Abstract
Organophosphorus nerve agents (OPNAs) inhibit acetylcholinesterase (AChE) and, despite the Chemical Weapons Convention arms control treaty, continue to represent a threat to both military personnel and civilians. 2-Pralidoxime (2-PAM) is currently the only therapeutic countermeasure approved by the United States Food and Drug Administration for treating OPNA poisoning. However, 2-PAM is not centrally active due to its hydrophilicity and resulting poor blood-brain barrier permeability; hence, these deficiencies warrant the development of more hydrophobic analogs. Specifically, gaps exist in previously published structure activity relationship (SAR) studies for 2-PAM, thereby making it difficult to rationally design novel analogs that are concomitantly more permeable and more efficacious. In this study, we methodically performed a methyl scan on the core pyridinium of 2-PAM to identify ring positions that could tolerate both additional steric bulk and hydrophobicity. Subsequently, SAR-guided molecular docking was used to rationalize hydropathically feasible binding modes for 2-PAM and the reported derivatives. Overall, the data presented herein provide new insights that may facilitate the rational design of more efficacious 2-PAM analogs.
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Affiliation(s)
- Adriana Gambino
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - James C. Burnett
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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19
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Understanding the Interaction Modes and Reactivity of Trimedoxime toward MmAChE Inhibited by Nerve Agents: Theoretical and Experimental Aspects. Int J Mol Sci 2020; 21:ijms21186510. [PMID: 32899591 PMCID: PMC7554915 DOI: 10.3390/ijms21186510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 11/17/2022] Open
Abstract
Organophosphorus (OP) compounds are used as both chemical weapons and pesticides. However, these agents are very dangerous and toxic to humans, animals, and the environment. Thus, investigations with reactivators have been deeply developed in order to design new antidotes with better efficiency, as well as a greater spectrum of action in the acetylcholinesterase (AChE) reactivation process. With that in mind, in this work, we investigated the behavior of trimedoxime toward the Mus musculus acetylcholinesterase (MmAChE) inhibited by a range of nerve agents, such as chemical weapons. From experimental assays, reactivation percentages were obtained for the reactivation of different AChE–OP complexes. On the other hand, theoretical calculations were performed to assess the differences in interaction modes and the reactivity of trimedoxime within the AChE active site. Comparing theoretical and experimental data, it is possible to notice that the oxime, in most cases, showed better reactivation percentages at higher concentrations, with the best result for the reactivation of the AChE–VX adduct. From this work, it was revealed that the mechanistic process contributes most to the oxime efficiency than the interaction in the site. In this way, this study is important to better understand the reactivation process through trimedoxime, contributing to the proposal of novel antidotes.
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20
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Safety and Efficacy of New Oximes to Reverse Low Dose Diethyl-Paraoxon-Induced Ventilatory Effects in Rats. Molecules 2020; 25:molecules25133056. [PMID: 32635368 PMCID: PMC7411965 DOI: 10.3390/molecules25133056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 06/30/2020] [Accepted: 07/02/2020] [Indexed: 12/31/2022] Open
Abstract
Background: Oximes are used in addition to atropine to treat organophosphate poisoning. However, the efficiency of oximes is still a matter of debate. In vitro experiments suggested than new oximes are more potent than the commercial oximes. However, the antidotal activity of new oximes has not been assessed in vivo. Methods: The aim of this work was to assess the safety and efficiency of new oximes compared to pralidoxime in a rat model of diethyl paraoxon-induced non-lethal respiratory toxicity. Results: Safety study of oximes showed no adverse effects on ventilation in rats. KO-33, KO-48, KO-74 oximes did not exhibit significant antidotal effect in vivo. In contrast, KO-27 and BI-6 showed evidence of antidotal activity by normalization of respiratory frequency and respiratory times. KO-27 became inefficient only during the last 30 min of the study. In contrast, pralidoxime demonstrated to be inefficient at 30 min post injection. Inversely, the antidotal activity of BI-6 occurred lately, within the last 90 min post injection. Conclusion: This study showed respiratory safety of new oximes. Regarding, the efficiency, KO-27 revealed to be a rapid acting antidote toward diethylparaoxon-induced respiratory toxicity, meanwhile BI-6 was a late-acting antidote. Simultaneous administration of these two oximes might result in a complete and prolonged antidotal efficiency.
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21
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Chambers JE, Dail MB, Meek EC. Oxime-mediated reactivation of organophosphate-inhibited acetylcholinesterase with emphasis on centrally-active oximes. Neuropharmacology 2020; 175:108201. [PMID: 32544483 DOI: 10.1016/j.neuropharm.2020.108201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/02/2020] [Accepted: 06/11/2020] [Indexed: 01/25/2023]
Abstract
This review provides an overview of the global research leading to the large number of compounds developed as reactivators of acetylcholinesterase inhibited by a variety of organophosphate compounds, most of which are nerve agents but also some insecticides. A number of these organophosphates are highly toxic and effective therapy by reactivators contributes to saving lives. Two major challenges for more effective therapy with reactivators are identification of a broad spectrum reactivator efficacious against a variety of organophosphate structures, and a reactivator that can cross the blood-brain barrier to protect the brain. The most effective of the reactivators developed are the nucleophilic pyridinium oximes, which bear a permanent positive charge from the quaternary nitrogen in the pyridinium ring. The permanent positive charge retards the oximes from crossing the blood-brain barrier and therefore restoration of normal cholinergic function in the brain is unlikely. A number of laboratories have developed nucleophiles, mostly oximes, that are theorized to cross the blood-brain barrier by several strategies. At the present time, no reactivator is optimally broad spectrum across the wide group of organophosphate chemistries. Some oximes, including the substituted phenoxyalkyl pyridinium oximes invented by our laboratories, have the potential to provide neuroprotection in the brain and show evidence of efficacy against both nerve agent and insecticidal chemistries, so these novel oximes have promise for future development. This article is part of the special issue entitled 'Acetylcholinesterase Inhibitors: From Bench to Bedside to Battlefield'.
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Affiliation(s)
- Janice E Chambers
- Center for Environmental Health Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762-6100, USA.
| | - Mary B Dail
- Center for Environmental Health Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762-6100, USA
| | - Edward C Meek
- Center for Environmental Health Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762-6100, USA
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22
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de Koning MC, Horn G, Worek F, van Grol M. Synthesis and in vitro evaluation of novel non-oximes for the reactivation of nerve agent inhibited human acetylcholinesterase. Chem Biol Interact 2020; 326:109139. [PMID: 32454005 DOI: 10.1016/j.cbi.2020.109139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/06/2020] [Accepted: 05/19/2020] [Indexed: 11/18/2022]
Abstract
Since several decades oximes have been used as part of treatment of nerve agent intoxication with the aim to restore the biological function of the enzyme acetylcholinesterase after its covalent inhibition by organophosphorus compounds such as pesticides and nerve agents. Recent findings have illustrated that, besides oximes, certain Mannich phenols can reactivate the inhibited enzyme very effectively, and may therefore represent an attractive complementary class of reactivators. In this paper we further probe the effect of structural variation on the in vitro efficacy of Mannich phenol based reactivators. Thus, we present the synthesis of 14 compounds that are close variants of the previously reported 4-amino-2-(1-pyrrolidinylmethyl)-phenol, a very effective non-oxime reactivator, and 3 dimeric Mannich phenols. All compounds were assessed for their ability to reactivate human acetylcholinesterase inhibited by the nerve agents VX, tabun, sarin, cyclosarin and paraoxon in vitro. It was confirmed that the potency of the compounds is highly sensitive to small structural changes, leading to diminished reactivation potency in many cases. However, the presence of 4-substituted alkylamine substituents (as exemplified with the 4-benzylamine-variant) was tolerated. More surprisingly, the dimeric compounds demonstrated non-typical behavior and displayed some reactivation potency as well. Both findings may open up new avenues for designing more effective non-oxime reactivators.
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Affiliation(s)
| | - Gabriele Horn
- Bundeswehr Institute of Pharmacology and Toxicology, Neuherbergstrasse 11, 80937, Munich, Germany
| | - Franz Worek
- Bundeswehr Institute of Pharmacology and Toxicology, Neuherbergstrasse 11, 80937, Munich, Germany
| | - Marco van Grol
- TNO, Lange Kleiweg 137, 2288, GJ Rijswijk, the Netherlands
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23
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de Castro AA, Assis LC, Soares FV, Kuca K, Polisel DA, da Cunha EFF, Ramalho TC. Trends in the Recent Patent Literature on Cholinesterase Reactivators (2016-2019). Biomolecules 2020; 10:biom10030436. [PMID: 32178264 PMCID: PMC7175240 DOI: 10.3390/biom10030436] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 03/02/2020] [Accepted: 03/03/2020] [Indexed: 12/22/2022] Open
Abstract
Acetylcholinesterase (AChE) is the key enzyme responsible for deactivating the ACh neurotransmitter. Irreversible or prolonged inhibition of AChE, therefore, elevates synaptic ACh leading to serious central and peripheral adverse effects which fall under the cholinergic syndrome spectra. To combat the toxic effects of some AChEI, such as organophosphorus (OP) nerve agents, many compounds with reactivator effects have been developed. Within the most outstanding reactivators, the substances denominated oximes stand out, showing good performance for reactivating AChE and restoring the normal synaptic acetylcholine (ACh) levels. This review was developed with the purpose of covering the new advances in AChE reactivation. Over the past years, researchers worldwide have made efforts to identify and develop novel active molecules. These researches have been moving farther into the search for novel agents that possess better effectiveness of reactivation and broad-spectrum reactivation against diverse OP agents. In addition, the discovery of ways to restore AChE in the aged form is also of great importance. This review will allow us to evaluate the major advances made in the discovery of new acetylcholinesterase reactivators by reviewing all patents published between 2016 and 2019. This is an important step in continuing this remarkable research so that new studies can begin.
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Affiliation(s)
- Alexandre A. de Castro
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil; (A.A.d.C.); (L.C.A.); (F.V.S.); (D.A.P.); (E.F.F.d.C.)
| | - Letícia C. Assis
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil; (A.A.d.C.); (L.C.A.); (F.V.S.); (D.A.P.); (E.F.F.d.C.)
| | - Flávia V. Soares
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil; (A.A.d.C.); (L.C.A.); (F.V.S.); (D.A.P.); (E.F.F.d.C.)
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, 500 03 Hradec Kralove, Czech Republic
- Correspondence: (K.K.); (T.C.R.)
| | - Daniel A. Polisel
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil; (A.A.d.C.); (L.C.A.); (F.V.S.); (D.A.P.); (E.F.F.d.C.)
| | - Elaine F. F. da Cunha
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil; (A.A.d.C.); (L.C.A.); (F.V.S.); (D.A.P.); (E.F.F.d.C.)
| | - Teodorico C. Ramalho
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil; (A.A.d.C.); (L.C.A.); (F.V.S.); (D.A.P.); (E.F.F.d.C.)
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, 500 03 Hradec Kralove, Czech Republic
- Correspondence: (K.K.); (T.C.R.)
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Cavalcante SFDA, Simas ABC, Barcellos MC, de Oliveira VGM, Sousa RB, Cabral PADM, Kuča K, França TCC. Acetylcholinesterase: The "Hub" for Neurodegenerative Diseases and Chemical Weapons Convention. Biomolecules 2020; 10:biom10030414. [PMID: 32155996 PMCID: PMC7175162 DOI: 10.3390/biom10030414] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/02/2020] [Accepted: 03/03/2020] [Indexed: 12/12/2022] Open
Abstract
This article describes acetylcholinesterase (AChE), an enzyme involved in parasympathetic neurotransmission, its activity, and how its inhibition can be pharmacologically useful for treating dementia, caused by Alzheimer’s disease, or as a warfare method due to the action of nerve agents. The chemical concepts related to the irreversible inhibition of AChE, its reactivation, and aging are discussed, along with a relationship to the current international legislation on chemical weapons.
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Affiliation(s)
- Samir F. de A. Cavalcante
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), CCS, Bloco H, Rio de Janeiro 21941-902, Brazil
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003 Hradec Králové, Czech Republic
- Correspondence: (S.F.d.A.C.); (A.B.C.S.); (K.K.); (T.C.C.F.); Tel.: +55-21-998-419-561 (S.F.d.A.C.); +55-21-998-744-886 (A.B.C.S.); +420-603-289-166 (K.K.)
| | - Alessandro B. C. Simas
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), CCS, Bloco H, Rio de Janeiro 21941-902, Brazil
- Correspondence: (S.F.d.A.C.); (A.B.C.S.); (K.K.); (T.C.C.F.); Tel.: +55-21-998-419-561 (S.F.d.A.C.); +55-21-998-744-886 (A.B.C.S.); +420-603-289-166 (K.K.)
| | - Marcos C. Barcellos
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Victor G. M. de Oliveira
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Roberto B. Sousa
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Paulo A. de M. Cabral
- Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Brazilian Army Technological Center (CTEx), Avenida das Américas 28705, Rio de Janeiro 23020-470, Brazil; (M.C.B.); (V.G.M.d.O.); (R.B.S.); (P.A.d.M.C.)
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003 Hradec Králové, Czech Republic
- Correspondence: (S.F.d.A.C.); (A.B.C.S.); (K.K.); (T.C.C.F.); Tel.: +55-21-998-419-561 (S.F.d.A.C.); +55-21-998-744-886 (A.B.C.S.); +420-603-289-166 (K.K.)
| | - Tanos C. C. França
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003 Hradec Králové, Czech Republic
- Laboratory of Molecular Modelling Applied to Chemical and Biological Defense (LMACBD), Military Institute of Engineering (IME), Praça General Tibúrcio 80, Rio de Janeiro 22290-270, Brazil
- Correspondence: (S.F.d.A.C.); (A.B.C.S.); (K.K.); (T.C.C.F.); Tel.: +55-21-998-419-561 (S.F.d.A.C.); +55-21-998-744-886 (A.B.C.S.); +420-603-289-166 (K.K.)
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25
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Malinak D, Dolezal R, Hepnarova V, Hozova M, Andrys R, Bzonek P, Racakova V, Korabecny J, Gorecki L, Mezeiova E, Psotka M, Jun D, Kuca K, Musilek K. Synthesis, in vitro screening and molecular docking of isoquinolinium-5-carbaldoximes as acetylcholinesterase and butyrylcholinesterase reactivators. J Enzyme Inhib Med Chem 2020; 35:478-488. [PMID: 31910701 PMCID: PMC6968506 DOI: 10.1080/14756366.2019.1710501] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The series of symmetrical and unsymmetrical isoquinolinium-5-carbaldoximes was designed and prepared for cholinesterase reactivation purposes. The novel compounds were evaluated for intrinsic acetylcholinesterase (AChE) or butyrylcholinesterase (BChE) inhibition, when the majority of novel compounds resulted with high inhibition of both enzymes and only weak inhibitors were selected for reactivation experiments on human AChE or BChE inhibited by sarin, VX, or paraoxon. The AChE reactivation for all used organophosphates was found negligible if compared to the reactivation ability of obidoxime. Importantly, two compounds were found to reactivate BChE inhibited by sarin or VX better to obidoxime at human attainable concentration. One compound resulted as better reactivator of NEMP (VX surrogate)-inhibited BChE than obidoxime. The in vitro results were further rationalized by molecular docking studies showing future directions on designing potent BChE reactivators.
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Affiliation(s)
- David Malinak
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Rafael Dolezal
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Vendula Hepnarova
- Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Miroslava Hozova
- Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Rudolf Andrys
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Petr Bzonek
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Veronika Racakova
- Faculty of Informatics and Management, Center for Basic and Applied Research, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jan Korabecny
- Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Lukas Gorecki
- Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Eva Mezeiova
- Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Miroslav Psotka
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Daniel Jun
- Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Kamil Musilek
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
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26
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Reactivation of VX-Inhibited Human Acetylcholinesterase by Deprotonated Pralidoxime. A Complementary Quantum Mechanical Study. Biomolecules 2020; 10:biom10020192. [PMID: 32012780 PMCID: PMC7072650 DOI: 10.3390/biom10020192] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 01/25/2023] Open
Abstract
In the present work, we performed a complementary quantum mechanical (QM) study to describe the mechanism by which deprotonated pralidoxime (2-PAM) could reactivate human (Homo sapiens sapiens) acetylcholinesterase (HssAChE) inhibited by the nerve agent VX. Such a reaction is proposed to occur in subsequent addition-elimination steps, starting with a nucleophile bimolecular substitution (SN2) mechanism through the formation of a trigonal bipyramidal transition state (TS). A near attack conformation (NAC), obtained in a former study using molecular mechanics (MM) calculations, was taken as a starting point for this project, where we described the possible formation of the TS. Together, this combined QM/MM study on AChE reactivation shows the feasibility of the reactivation occurring via attack of the deprotonated form of 2-PAM against the Ser203-VX adduct of HssAChE.
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27
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Gorecki L, Andrys R, Schmidt M, Kucera T, Psotka M, Svobodova B, Hrabcova V, Hepnarova V, Bzonek P, Jun D, Kuca K, Korabecny J, Musilek K. Cysteine-Targeted Insecticides against A. gambiae Acetylcholinesterase Are Neither Selective nor Reversible Inhibitors. ACS Med Chem Lett 2020; 11:65-71. [PMID: 31938465 DOI: 10.1021/acsmedchemlett.9b00477] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 11/26/2019] [Indexed: 11/28/2022] Open
Abstract
Acetylcholinesterase cysteine-targeted insecticides against malaria vector Anopheles gambia and other mosquitos have already been introduced. We have applied the olefin metathesis for the preparation of cysteine-targeted insecticides in high yields. The prepared compounds with either a succinimide or maleimide moiety were evaluated on Anopheles gambiae and human acetylcholinesterase with relatively high irreversible inhibition of both enzymes but poor selectivity. The concept of cysteine binding was not proved by several methods, and poor stability was observed of the chosen most potent/selective compounds in a water/buffer environment. Thus, our findings do not support the proposed concept of cysteine-targeted selective insecticides for the prepared series of succinimide or maleimide compounds.
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Affiliation(s)
- Lukas Gorecki
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Rudolf Andrys
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Monika Schmidt
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Tomas Kucera
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Miroslav Psotka
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Barbora Svobodova
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Veronika Hrabcova
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Vendula Hepnarova
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Petr Bzonek
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Daniel Jun
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Kamil Kuca
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Jan Korabecny
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Defence, Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
| | - Kamil Musilek
- University Hospital Hradec Kralove, Biomedical Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
- University of Hradec Kralove, Faculty of Science, Department of Chemistry, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
- Florida International University, Herbert Wertheim College of Medicine, Department of Cellular Biology & Pharmacology, 11200 SW Eighth Street GL 495-G Miami, Florida 33199, United States
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Parvaz S, Taheri-Ledari R, Esmaeili MS, Rabbani M, Maleki A. A brief survey on the advanced brain drug administration by nanoscale carriers: With a particular focus on AChE reactivators. Life Sci 2019; 240:117099. [PMID: 31760098 DOI: 10.1016/j.lfs.2019.117099] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/16/2019] [Accepted: 11/19/2019] [Indexed: 10/25/2022]
Abstract
Obviously, delivery of the medications to the brain is more difficult than other tissues due to the existence of a strong obstacle, which is called blood-brain barrier (BBB). Because of the lipophilic nature of this barrier, it would be a complex (and in many cases impossible) process to cross the medications with hydrophilic behavior from BBB and deliver them to the brain. Thus, novel intricate drug-carriers in nano scales have been recently developed and suitably applied for this purpose. One of the most important categories of these hydrophilic medications, are reactivators for acetyl cholinesterase (AChE) enzyme that facilitates the breakdown of acetylcholine (as a neurotransmitter). The AChE function is inhibited by organophosphorus (OP) nerve agents that are extremely used in military conflicts. In this review, the abilities of the nanosized drug delivery systems to perform as suitable vehicles for AChE reactivators are comprehensively discussed.
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Affiliation(s)
- Sina Parvaz
- Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Reza Taheri-Ledari
- Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Mir Saeed Esmaeili
- Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Mahboubeh Rabbani
- Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Ali Maleki
- Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
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29
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Jaćević V, Nepovimova E, Kuča K. Acute Toxic Injuries of Rat's Visceral Tissues Induced by Different Oximes. Sci Rep 2019; 9:16425. [PMID: 31712702 PMCID: PMC6848205 DOI: 10.1038/s41598-019-52768-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 10/23/2019] [Indexed: 12/27/2022] Open
Abstract
Certain AChE reactivators, asoxime, obidoxime, K027, K048, and K075, when taken in overdoses and sometimes even when introduced within therapeutic ranges, may injure the different organs. As a continuation of previously published data, in this study, Wistar rats have sacrificed 24 hrs and 7 days after single im application of 0.1LD50, 0.5LD50 and 1.0LD50 of each reactivator, and examinated tissue samples were obtained for pathohistological and semiquantitative analysis. A severity of tissue alteration, expressed as different tissue damage scores were evaluated. Morphological structure of examinated tissues treated with of 0.1LD50 of all reactivators was comparable with the control group of rats. Moderate injuries were seen in visceral tissues treated with 0.5LD50 of asoxime, obidoxime and K027. Acute damages were enlarged after treatment with 0.5LD50 and 1.0LD50 of all reactivators during the next 7 days. The most prominent changes were seen in rats treated with 1.0LD50 of K048 and K075 (P < 0.001 vs. control and asoxime-treated group). All reactivators given by a single, high, unitary dose regimen, have an adverse effect not only on the main visceral tissue, but on the whole rat as well, but the exact mechanism of cellular injury remains to be confirmed in further investigation.
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Affiliation(s)
- Vesna Jaćević
- National Poison Control Centre, Military Medical Academy, Belgrade, Serbia.,Faculty of Medicine of the Military Medical Academy, University of Defense, Belgrade, Serbia.,Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia.
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30
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Hepnarova V, Muckova L, Ring A, Pejchal J, Herman D, Misik J, Hrabinova M, Jun D, Soukup O. Pharmacological and toxicological in vitro and in vivo effect of higher doses of oxime reactivators. Toxicol Appl Pharmacol 2019; 383:114776. [DOI: 10.1016/j.taap.2019.114776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 09/18/2019] [Accepted: 10/04/2019] [Indexed: 12/26/2022]
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31
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Semenov VE, Zueva IV, Lushchekina SV, Lenina OA, Gubaidullina LM, Saifina LF, Shulaeva MM, Kayumova RM, Saifina AF, Gubaidullin AT, Kondrashova SA, Latypov SK, Masson P, Petrov KA. 6-Methyluracil derivatives as peripheral site ligand-hydroxamic acid conjugates: Reactivation for paraoxon-inhibited acetylcholinesterase. Eur J Med Chem 2019; 185:111787. [PMID: 31675511 DOI: 10.1016/j.ejmech.2019.111787] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/07/2019] [Accepted: 10/11/2019] [Indexed: 12/19/2022]
Abstract
New uncharged conjugates of 6-methyluracil derivatives with imidazole-2-aldoxime and 1,2,4-triazole-3-hydroxamic acid units were synthesized and studied as reactivators of organophosphate-inhibited cholinesterase. Using paraoxon (POX) as a model organophosphate, it was shown that 6-methyluracil derivatives linked with hydroxamic acid are able to reactivate POX-inhibited human acetylcholinesterase (AChE) in vitro. The reactivating efficacy of one compound (5b) is lower than that of pyridinium-2-aldoxime (2-PAM). Meanwhile, unlike 2-PAM, in vivo study showed that the lead compound 5b is able: (1) to reactivate POX-inhibited AChE in the brain; (2) to decrease death of neurons and, (3) to prevent memory impairment in rat model of POX-induced neurodegeneration.
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Affiliation(s)
- Vyacheslav E Semenov
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation.
| | - Irina V Zueva
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Sofya V Lushchekina
- N.M. Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, Kosygina str., 4, Moscow, 119334, Russian Federation
| | - Oksana A Lenina
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Lilya M Gubaidullina
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Lilya F Saifina
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Marina M Shulaeva
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Ramilya M Kayumova
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Alina F Saifina
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Aidar T Gubaidullin
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Svetlana A Kondrashova
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Shamil K Latypov
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
| | - Patrick Masson
- Kazan Federal University, Kremlyovskaya str., 18, Kazan, 420008, Russian Federation
| | - Konstantin A Petrov
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center "Kazan Scientific Center of the Russian Academy of Sciences", Arbuzov str., 8, Kazan, 420088, Russian Federation
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de A. Cavalcante SF, Simas ABC, Kuča K. Nerve Agents’ Surrogates: Invaluable Tools for Development of Acetylcholinesterase Reactivators. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190806114017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The use of nerve agents as warfare and in terrorist acts has drawn much attention from the governments and societies. Such toxic organophosphorus compounds are listed in Chemical Weapons Convention as Schedule 1 chemicals. The discussion about the chemical identity of the elusive Novichok agents, more potent compounds than best known G- and V-Agents, which have been implicated in recent rumorous assassination plots, clearly demonstrating the importance of the matter. Furthermore, accidents with pesticides or misuse thereof have been a pressing issue in many countries. In this context, the continued development of novel cholinesterase reactivators, antidotes for organophosphorus poisoning, a rather restricted class of pharmaceutical substances, is warranted. Testing of novel candidates may require use of actual nerve agents. Nonetheless, only a few laboratories comply with the requirements for storing, possession and manipulation of such toxic chemicals. To overcome such limitations, nerve agents’ surrogates may be a useful alternative, as they undergo the same reaction with cholinesterases, yielding similar adducts, allowing assays with novel antidote candidates, among other applications.
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Affiliation(s)
- Samir F. de A. Cavalcante
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Alessandro B. C. Simas
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
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Tacroximes: novel unique compounds for the recovery of organophosphorus-inhibited acetylcholinesterase. Future Med Chem 2019; 11:2625-2634. [DOI: 10.4155/fmc-2019-0027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Organophosphorus compounds are irreversible inhibitors of AChE. Without immediate countermeasure, intoxication leads quickly to death. None of the clinically-used causal antidotes can ensure a good prognosis for any poisoned patient. When fallen into the wrong hands, organophosphates represent a serious threat to mankind. Results & methodology: Herein, we describe two novel compounds as unique merged molecules built on a tacrine scaffold against organophosphorus intoxication. These reactivators of AChE have balanced physicochemical properties, and should be able to cross the blood–brain barrier with a slightly lowered cytotoxicity profile compared to reference tacrine. Conclusion: Their efficiency compared with pralidoxime and obidoxime was proved against dichlorvos.
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Bharate SB, Chao CK, Thompson CM. Comparison of the reactivation rates of acetylcholinesterase modified by structurally different organophosphates using novel pyridinium oximes. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2019; 71:103218. [PMID: 31302432 PMCID: PMC6736693 DOI: 10.1016/j.etap.2019.103218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 03/27/2019] [Accepted: 06/24/2019] [Indexed: 06/10/2023]
Abstract
A novel panel of oximes were synthesized, which have displayed varying degree of reactivation ability towards different organophosphorus (OP) modified cholinesterases. In the present article, we report a comparative reactivation profile of a series of quaternary pyridinium-oximes for electric eel acetylcholinesterase (EEAChE) inhibited by the organophosphorus (OP) inhibitors methyl paraoxon (MePOX), ethyl paraoxon (POX; paraoxon) and diisopropyl fluorophosphate (DFP) that are distinguishable as dimethoxyphosphoryl, diethoxyphosphoryl and diisopropoxyphosphoryl AChE-OP-adducts. Most of the 59-oximes tested led to faster and more extensive reactivation of MePOX- and POX-inhibited EEAChE as compared to DFP-modified EEAChE. All were effective reactivators of three OP-modified EEAChE conjugates showing 18-21% reactivation for DFP-inhibited AChE and ≥45% reactivation for MePOX- and POX-inhibited EEAChE. Oximes 7 and 8 showed kr values better than pralidoxime (1) for DFP-inhibited EEAChE. Reactivation rates determined at different inhibition times showed no significant change in kr values during 0-90 min incubation with three OPs. However, a 34-72% decrease in kr for MePOX and POX and > 95% decrease in kr for DFP-inhibited EEAChE was observed after 24 h of OP-exposure (aging).
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Affiliation(s)
- Sandip B Bharate
- The Center for Structural and Functional Neuroscience, Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT, 59812, USA; Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, India.
| | - Chih-Kai Chao
- The Center for Structural and Functional Neuroscience, Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT, 59812, USA
| | - Charles M Thompson
- The Center for Structural and Functional Neuroscience, Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT, 59812, USA.
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Bajgar J, Kassa J, Kucera T, Musilek K, Jun D, Kuca K. Some Possibilities to Study New Prophylactics against Nerve Agents. Mini Rev Med Chem 2019; 19:970-979. [PMID: 30827238 DOI: 10.2174/1389557519666190301112530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 04/10/2017] [Accepted: 04/26/2017] [Indexed: 11/22/2022]
Abstract
Nerve agents belong to the most dangerous chemical warfare agents and can be/were misused by terrorists. Effective prophylaxis and treatment is necessary to diminish their effect. General principles of prophylaxis are summarized (protection against acetylcholinesterase inhibition, detoxification, treatment "in advance" and use of different drugs). They are based on the knowledge of mechanism of action of nerve agents. Among different examinations, it is necessary to test prophylactic effectivity in vivo and compare the results with protection in vitro. Chemical and biological approaches to the development of new prophylactics would be applied simultaneously during this research. Though the number of possible prophylactics is relatively high, the only four drugs were introduced into military medical practice. At present, pyridostigmine seems to be common prophylactic antidote; prophylactics panpal (tablets with pyridostigmine, trihexyphenidyl and benactyzine), transant (transdermal patch containing HI-6) are other means introduced into different armies as prophylactics. Scavenger commercionally available is Protexia®. Future development will be focused on scavengers, and on other drugs either reversible cholinesterase inhibitors (e.g., huperzine A, gallantamine, physostigmine, acridine derivatives) or other compounds.
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Affiliation(s)
- J Bajgar
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - J Kassa
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - T Kucera
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - K Musilek
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - D Jun
- Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - K Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.,Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
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Jaćević V, Nepovimova E, Kuča K. Interspecies and intergender differences in acute toxicity of K-oximes drug candidates. Chem Biol Interact 2019; 308:312-316. [PMID: 31153983 DOI: 10.1016/j.cbi.2019.05.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/22/2019] [Accepted: 05/22/2019] [Indexed: 01/17/2023]
Abstract
K-oximes were developed as modern drug candidates acting as AChE reactivators. In this study, it has been investigated which interspecies and intergender differences changes could be observed in Wistar rats and Swiss mice, both genders, after the treatment with increasing doses of selected acetylcholinesterase reactivators - asoxime, obidoxime, K027, K048, and K075. After the 24 h, a number of died animals was counted and the median lethal dose (LD50) for each oxime was calculated. By using the intramuscular route of administration, asoxime and K027 had the least toxicity in female rats (640.21 mg/kg and 686.08 mg/kg), and in female mice (565.75 mg/kg and 565.74 mg/kg), respectively. Moreover, asoxime and K027 showed 3, 4 or 8 times less acute toxicity in comparison to K048, obidoxime and K075, respectively. Beyond, K075 had the greatest toxicity in male rats (81.53 mg/kg), and in male mice (57.34 mg/kg), respectively. Our results can help to predict likely adverse toxic effects, target organ systems and possible outcome in the event of massive human overexposure, and in establishing risk categories or in dose selection for the initial repeated dose toxicity tests to be conducted for each oxime.
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Affiliation(s)
- Vesna Jaćević
- National Poison Control Centre, Military Medical Academy, 17 Crnotravska St, 11000, Belgrade, Republic of Serbia; Medical Faculty of the Military Medical Academy, University of Defence, 1 Pavla Jurišića-Šturma St, 11000, Belgrade, Republic of Serbia; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 50003, Hradec Králové, Czech Republic
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 50003, Hradec Králové, Czech Republic
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanského 62, 50003, Hradec Králové, Czech Republic; Malaysia-Japan International Institute of Technology (MJIIT), University Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
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da Silva JAV, Nepovimova E, Ramalho TC, Kuca K, Costa França TC. Molecular modelling studies on the interactions of 7-methoxytacrine-4-pyridinealdoxime with VX-inhibited human acetylcholinesterase. A near attack approach to assess different spacer-lengths. Chem Biol Interact 2019; 307:195-205. [DOI: 10.1016/j.cbi.2019.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/18/2019] [Accepted: 05/13/2019] [Indexed: 10/26/2022]
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Polisel DA, de Castro AA, Mancini DT, da Cunha EFF, França TCC, Ramalho TC, Kuca K. Slight difference in the isomeric oximes K206 and K203 makes huge difference for the reactivation of organophosphorus-inhibited AChE: Theoretical and experimental aspects. Chem Biol Interact 2019; 309:108671. [PMID: 31207225 DOI: 10.1016/j.cbi.2019.05.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/28/2019] [Accepted: 05/22/2019] [Indexed: 01/26/2023]
Abstract
Studies with oximes have been extensively developed to design new reactivators with better efficiency, and greater spectrum of action. In this study, we aimed to analyze the influence of the Carbamoyl group position change in two isomeric oximes, K203 and K206, on the reactivation percentage of Mus musculus Acetylcholinesterase (MmAChE), inhibited by different nerve agents. Theoretical calculations were performed to assess the difference for the oxime activity with inhibited AChE-complexes and the factors that govern this difference. Comparing theoretical and experimental data, it is possible to observe that this change between the oximes results in different reactivation percentage for the same nerve agent, due to the different interaction modes and activation energy for the studied systems.
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Affiliation(s)
- Daniel A Polisel
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil
| | | | - Daiana T Mancini
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil
| | - Elaine F F da Cunha
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil; Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, Brazil
| | - Tanos C C França
- Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, Brazil; Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Teodorico C Ramalho
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.
| | - Kamil Kuca
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic.
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39
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da Silva JAV, Nepovimova E, Ramalho TC, Kuca K, Celmar Costa França T. Molecular modeling studies on the interactions of 7-methoxytacrine-4-pyridinealdoxime, 4-PA, 2-PAM, and obidoxime with VX-inhibited human acetylcholinesterase: a near attack conformation approach. J Enzyme Inhib Med Chem 2019; 34:1018-1029. [PMID: 31074292 PMCID: PMC6522925 DOI: 10.1080/14756366.2019.1609953] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
7-methoxytacrine-4-pyridinealdoxime (7-MEOTA-4-PA, named hybrid 5C) is a compound formerly synthesized and evaluated in vitro, together with 4-pyridine aldoxime (4-PA) and commercial reactivators of acetylcholinesterase (AChE). This compound was designed with the purpose of being a prophylactic reactivator, capable of interacting with different subdomains of the active site of AChE. To investigate these interactions, theoretical results from docking were first compared with experimental data of hybrid 5C, 4-PA, and two commercial oximes, on the reactivation of human AChE (HssAChE) inhibited by VX. Then, further docking studies, molecular dynamics simulations, and molecular mechanics Poisson–Boltzmann surface area calculations, were carried out to investigate reactivation performances, considering the near attack conformation (NAC) approach, prior to the nucleophilic substitution mechanism. Our results helped to elucidate the interactions of such molecules with the different subdomains of the active site of HssAChE. Additionally, NAC poses of each oxime were suggested for further theoretical studies on the reactivation reaction.
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Affiliation(s)
- Jorge Alberto Valle da Silva
- a Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Department of Chemical Engineering , Military Institute of Engineering , Rio de Janeiro/RJ , Brazil
| | - Eugenie Nepovimova
- b Faculty of Science, Department of Chemistry , University of Hradec Kralove , Hradec Kralove , Czech Republic
| | - Teodorico Castro Ramalho
- b Faculty of Science, Department of Chemistry , University of Hradec Kralove , Hradec Kralove , Czech Republic.,c Laboratory of Molecular Modeling, Chemistry Department , Federal University of Lavras , Lavras , Brazil
| | - Kamil Kuca
- b Faculty of Science, Department of Chemistry , University of Hradec Kralove , Hradec Kralove , Czech Republic
| | - Tanos Celmar Costa França
- a Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Department of Chemical Engineering , Military Institute of Engineering , Rio de Janeiro/RJ , Brazil.,b Faculty of Science, Department of Chemistry , University of Hradec Kralove , Hradec Kralove , Czech Republic
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40
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Cavalcante SFDA, Kitagawa DAS, Rodrigues RB, Bernardo LB, da Silva TN, Dos Santos WV, Correa ABDA, de Almeida JSFD, França TCC, Kuča K, Simas ABC. Synthesis and in vitro evaluation of neutral aryloximes as reactivators of Electrophorus eel acetylcholinesterase inhibited by NEMP, a VX surrogate. Chem Biol Interact 2019; 309:108682. [PMID: 31163137 DOI: 10.1016/j.cbi.2019.05.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/23/2019] [Accepted: 05/27/2019] [Indexed: 01/08/2023]
Abstract
Casualties caused by nerve agents, potent acetylcholinesterase inhibitors, have attracted attention from media recently. Poisoning with these chemicals may be fatal if not correctly addressed. Therefore, research on novel antidotes is clearly warranted. Pyridinium oximes are the only clinically available compounds, but poor penetration into the blood-brain barrier hampers efficient enzyme reactivation at the central nervous system. In searching for structural factors that may be explored in SAR studies, we synthesized and evaluated neutral aryloximes as reactivators for acetylcholinesterase inhibited by NEMP, a VX surrogate. Although few tested compounds reached comparable reactivation results with clinical standards, they may be considered as leads for further optimization.
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Affiliation(s)
- Samir F de A Cavalcante
- Brazilian Army Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Avenida das Américas 28705, Rio de Janeiro, 23020-470, Brazil; Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), CCS, Bloco H, Rio de Janeiro, 21941-902, Brazil; University Castelo Branco (UCB), School of Pharmacy, Avenida Santa Cruz 1631, Rio de Janeiro, 21710-255, Brazil; Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003, Hradec Králové, Czech Republic.
| | - Daniel A S Kitagawa
- Laboratory of Molecular Modelling Applied to Chemical and Biological Defense (LMACDB), Praça General Tibúrcio 80, Rio de Janeiro, 22290-270, Brazil
| | - Rafael B Rodrigues
- Brazilian Army Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Avenida das Américas 28705, Rio de Janeiro, 23020-470, Brazil
| | - Leandro B Bernardo
- Brazilian Army Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Avenida das Américas 28705, Rio de Janeiro, 23020-470, Brazil
| | - Thiago N da Silva
- University Castelo Branco (UCB), School of Pharmacy, Avenida Santa Cruz 1631, Rio de Janeiro, 21710-255, Brazil
| | - Wellington V Dos Santos
- Emergency and Rescue Department (DSE), Rio de Janeiro State Fire Department (CBMERJ), Praça São Salvador 4, Rio de Janeiro, 22231-170, Brazil; University Universus Veritas (UNIVERITAS), School of Biomedicine, Rua Marquês de Abrantes 55, Rio de Janeiro, 22230-060, Brazil
| | - Ana Beatriz de A Correa
- Brazilian Army Institute of Chemical, Biological, Radiological and Nuclear Defense (IDQBRN), Avenida das Américas 28705, Rio de Janeiro, 23020-470, Brazil
| | - Joyce S F D de Almeida
- Laboratory of Molecular Modelling Applied to Chemical and Biological Defense (LMACDB), Praça General Tibúrcio 80, Rio de Janeiro, 22290-270, Brazil
| | - Tanos C C França
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003, Hradec Králové, Czech Republic; Laboratory of Molecular Modelling Applied to Chemical and Biological Defense (LMACDB), Praça General Tibúrcio 80, Rio de Janeiro, 22290-270, Brazil
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanskeho 62, 50003, Hradec Králové, Czech Republic
| | - Alessandro B C Simas
- Walter Mors Institute of Research on Natural Products (IPPN), Federal University of Rio de Janeiro (UFRJ), CCS, Bloco H, Rio de Janeiro, 21941-902, Brazil.
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Gerlits O, Kong X, Cheng X, Wymore T, Blumenthal DK, Taylor P, Radić Z, Kovalevsky A. Productive reorientation of a bound oxime reactivator revealed in room temperature X-ray structures of native and VX-inhibited human acetylcholinesterase. J Biol Chem 2019; 294:10607-10618. [PMID: 31138650 DOI: 10.1074/jbc.ra119.008725] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/21/2019] [Indexed: 11/06/2022] Open
Abstract
Exposure to organophosphorus compounds (OPs) may be fatal if untreated, and a clear and present danger posed by nerve agent OPs has become palpable in recent years. OPs inactivate acetylcholinesterase (AChE) by covalently modifying its catalytic serine. Inhibited AChE cannot hydrolyze the neurotransmitter acetylcholine leading to its build-up at the cholinergic synapses and creating an acute cholinergic crisis. Current antidotes, including oxime reactivators that attack the OP-AChE conjugate to free the active enzyme, are inefficient. Better reactivators are sought, but their design is hampered by a conformationally rigid portrait of AChE extracted exclusively from 100K X-ray crystallography and scarcity of structural knowledge on human AChE (hAChE). Here, we present room temperature X-ray structures of native and VX-phosphonylated hAChE with an imidazole-based oxime reactivator, RS-170B. We discovered that inhibition with VX triggers substantial conformational changes in bound RS-170B from a "nonproductive" pose (the reactive aldoxime group points away from the VX-bound serine) in the reactivator-only complex to a "semi-productive" orientation in the VX-modified complex. This observation, supported by concurrent molecular simulations, suggested that the narrow active-site gorge of hAChE may be significantly more dynamic than previously thought, allowing RS-170B to reorient inside the gorge. Furthermore, we found that small molecules can bind in the choline-binding site hindering approach to the phosphorous of VX-bound serine. Our results provide structural and mechanistic perspectives on the reactivation of OP-inhibited hAChE and demonstrate that structural studies at physiologically relevant temperatures can deliver previously overlooked insights applicable for designing next-generation antidotes.
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Affiliation(s)
- Oksana Gerlits
- From the Bredesen Center, University of Tennessee, Knoxville, Tennessee 37996
| | - Xiaotian Kong
- the Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210
| | - Xiaolin Cheng
- the Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210
| | - Troy Wymore
- the Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Donald K Blumenthal
- the Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112
| | - Palmer Taylor
- the Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California 92093-0751, and
| | - Zoran Radić
- the Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California 92093-0751, and
| | - Andrey Kovalevsky
- the Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Kobrlova T, Korabecny J, Soukup O. Current approaches to enhancing oxime reactivator delivery into the brain. Toxicology 2019; 423:75-83. [PMID: 31112674 DOI: 10.1016/j.tox.2019.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/17/2019] [Accepted: 05/13/2019] [Indexed: 01/21/2023]
Abstract
The misuse of organophosphate compounds still represents a current threat worldwide. Treatment of poisoning with organophosphates (OPs) remains unsatisfactorily resolved despite the extensive investment in research in academia. There are no universal, effective and centrally-active acetylcholinesterase (AChE) reactivators to countermeasure OP intoxication. One major obstacle is to overcome the blood-brain barrier (BBB). The central compartment is readily accessible by the OPs which are lipophilic bullets that can easily cross the BBB, whereas first-line therapeutics, namely oxime-based AChE reactivators and atropine, do not cross or do so rather slowly. The limitation of oxime-based AChE reactivators can be ascribed to their chemical nature, bearing a positive charge which is essential either for their AChE affinity or their reactivating potency. The aim of this article is to review the methods for targeting the brain by oxime reactivators that have been developed so far. Approaches using prodrugs, lipophilicity enhancement, or sugar-based oximes have been rather unsuccessful. However, other strategies have been more promising, such as the use of nanoparticles or co-administration of the reactivator with efflux transporter inhibitors. Encouraging results have also been associated with intranasal delivery, but research in this field is still at the beginning. Further research of auspicious approaches is inevitable.
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Affiliation(s)
- Tereza Kobrlova
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Kralove, Czech Republic; Biomedical Research Centre, University Hospital, Sokolska 581, 500 05, Hradec Kralove, Czech Republic.
| | - Jan Korabecny
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Kralove, Czech Republic; Biomedical Research Centre, University Hospital, Sokolska 581, 500 05, Hradec Kralove, Czech Republic.
| | - Ondrej Soukup
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Kralove, Czech Republic; Biomedical Research Centre, University Hospital, Sokolska 581, 500 05, Hradec Kralove, Czech Republic.
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Kuznetsova DA, Gabdrakhmanov DR, Vasilieva EA, Lukashenko SS, Ahtamyanova LR, Siraev IS, Zakharova LY. Supramolecular Catalytic Systems Based on a Cationic Amphiphile and Sodium Polystyrene Sulfonate for Decomposition of Organophosphorus Pollutants. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428019010032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Franjesevic AJ, Sillart SB, Beck JM, Vyas S, Callam CS, Hadad CM. Resurrection and Reactivation of Acetylcholinesterase and Butyrylcholinesterase. Chemistry 2019; 25:5337-5371. [PMID: 30444932 PMCID: PMC6508893 DOI: 10.1002/chem.201805075] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/15/2018] [Indexed: 01/10/2023]
Abstract
Organophosphorus (OP) nerve agents and pesticides present significant threats to civilian and military populations. OP compounds include the nefarious G and V chemical nerve agents, but more commonly, civilians are exposed to less toxic OP pesticides, resulting in the same negative toxicological effects and thousands of deaths on an annual basis. After decades of research, no new therapeutics have been realized since the mid-1900s. Upon phosphylation of the catalytic serine residue, a process known as inhibition, there is an accumulation of acetylcholine (ACh) in the brain synapses and neuromuscular junctions, leading to a cholinergic crisis and eventually death. Oxime nucleophiles can reactivate select OP-inhibited acetylcholinesterase (AChE). Yet, the fields of reactivation of AChE and butyrylcholinesterase encounter additional challenges as broad-spectrum reactivation of either enzyme is difficult. Additional problems include the ability to cross the blood brain barrier (BBB) and to provide therapy in the central nervous system. Yet another complication arises in a competitive reaction, known as aging, whereby OP-inhibited AChE is converted to an inactive form, which until very recently, had been impossible to reverse to an active, functional form. Evaluations of uncharged oximes and other neutral nucleophiles have been made. Non-oxime reactivators, such as aromatic general bases and Mannich bases, have been developed. The issue of aging, which generates an anionic phosphylated serine residue, has been historically recalcitrant to recovery by any therapeutic approach-that is, until earlier this year. Mannich bases not only serve as reactivators of OP-inhibited AChE, but this class of compounds can also recover activity from the aged form of AChE, a process referred to as resurrection. This review covers the modern efforts to address all of these issues and notes the complexities of therapeutic development along these different lines of research.
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Affiliation(s)
- Andrew J Franjesevic
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Ave, Columbus, OH, 43210, USA
| | - Sydney B Sillart
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Ave, Columbus, OH, 43210, USA
| | - Jeremy M Beck
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Ave, Columbus, OH, 43210, USA
| | - Shubham Vyas
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Ave, Columbus, OH, 43210, USA
- Current Address: Department of Chemistry, Colorado School of Mines, 1500 Illinois St., Golden, CO, 80401, USA
| | - Christopher S Callam
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Ave, Columbus, OH, 43210, USA
| | - Christopher M Hadad
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Ave, Columbus, OH, 43210, USA
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Sheet SK, Sen B, Khatua S. Organoiridium(III) Complexes as Luminescence Color Switching Probes for Selective Detection of Nerve Agent Simulant in Solution and Vapor Phase. Inorg Chem 2019; 58:3635-3645. [PMID: 30843684 DOI: 10.1021/acs.inorgchem.8b03044] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this work, cationic organoiridium(III) complex based photoluminescent (PL) probes have been developed to selectively detect the chemical warfare nerve agent mimic, diethyl chlorophosphate(DCP) at nanomolar range by distinct bright green to orange-red luminescence color switching (on-off-on) in solution as well as in the vapor phase. Interference of other chemical warfare agents (CWAs) and their mimics was not observed either by PL spectroscopy or with the naked-eye in solution and gas phase. The detection was attained via a simultaneous nucleophilic attack of two -OH groups of the 4,7-dihydroxy-1,10-phenanthroline ligand with DCP by forming bulkier phosphotriester. The detailed reaction mechanism was established through extensive 1H NMR titration, 31P NMR, and ESI-MS analysis. Finally, a test paper strip and solid poly(ethylene oxide) (PEO) film with iridium(III) complex 1[PF6] were fabricated for the vapor-phase detection of DCP. The solution and vapor-phase detection properties of these luminescent Ir(III) complexes can offer a worthy approach into the design of new metal complex based PL switching probes for chemical warfare agents.
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Affiliation(s)
- Sanjoy Kumar Sheet
- Centre for Advanced Studies, Department of Chemistry , North Eastern Hill University , Shillong , Meghalaya 793022 , India
| | - Bhaskar Sen
- Centre for Advanced Studies, Department of Chemistry , North Eastern Hill University , Shillong , Meghalaya 793022 , India
| | - Snehadrinarayan Khatua
- Centre for Advanced Studies, Department of Chemistry , North Eastern Hill University , Shillong , Meghalaya 793022 , India
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Toxic Injury to Muscle Tissue of Rats Following Acute Oximes Exposure. Sci Rep 2019; 9:1457. [PMID: 30728420 PMCID: PMC6365527 DOI: 10.1038/s41598-018-37837-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 12/13/2018] [Indexed: 01/10/2023] Open
Abstract
Therapeutic application of newly developed oximes is limited due to their adverse effects on different tissues. Within this article, it has been investigated which morphological changes could be observed in Wistar rats after the treatment with increasing doses of selected acetyl cholinesterase reactivators - asoxime, obidoxime, K027, K048, and K075. Subsequently, heart, diaphragm and musculus popliteus were obtained for pathohistological and semiquantitative analysis 24 hrs and 7 days after im administration of a single dose of 0.1 LD50, 0.5 LD50, and 1.0 LD50 of each oxime. Different muscle damage score was based on an estimation scale from 0 (no damage) to 5 (strong damage). In rats treated with 0.1 LD50 of each oxime, muscle fibres did not show any change. The intensive degeneration was found in all muscles after treatment with 0.5 LD50 of asoxime and obidoxime, respectively. Acute toxic muscle injury was developed within 7 days following treatment with 0.5 LD50 and 1.0 LD50 of each oxime, with the highest values in K048 and K075 group (P < 0.001 vs. control and asoxime), respectively. The early muscle alterations observed in our study seem to contribute to the pathogenesis of the oxime-induced toxic muscle injury, which probably manifests as necrosis and/or inflammation.
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Gorecki L, Soukup O, Kucera T, Malinak D, Jun D, Kuca K, Musilek K, Korabecny J. Oxime K203: a drug candidate for the treatment of tabun intoxication. Arch Toxicol 2018; 93:673-691. [PMID: 30564897 DOI: 10.1007/s00204-018-2377-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 12/10/2018] [Indexed: 12/19/2022]
Abstract
For over 60 years, researchers across the world have sought to deal with poisoning by nerve agents, the most toxic and lethal chemical weapons. To date, there is no efficient causal antidote with sufficient effect. Every trialed compound fails to fulfil one or more criteria (e.g. reactivation potency, broad reactivation profile). In this recent contribution, we focused our attention to one of the promising compounds, namely the bis-pyridinium reactivator K203. The oxime K203 is very often cited as the best reactivator against tabun poisoning. Herein, we provide all the available literature data in comprehensive and critical review to address whether K203 could be considered as a new drug candidate against organophosphorus poisoning with the stress on tabun. We describe its development from the historical point of view and review all available in vitro as well as in vivo data to date. K203 is easily accessible by a relatively simple two-step synthesis. It is well accommodated in the enzyme active gorge of acetylcholinesterase providing suitable interactions for reactivation, as shown by molecular docking simulations. According to a literature survey, in vitro data for tabun-inhibited AChE are extraordinary. However, in vivo efficiency remains unconvincing. The K203 toxicity profile did not show any perturbations compared to clinically used standards; on the other hand versatility of K203 does not exceed currently available oximes. In summary, K203 does not seem to address current issues associated with the organophosphorus poisoning, especially the broad profile against all nerve agents. However, its reviewed efficacy entitles K203 to be considered as a backup or tentative replacement for obidoxime and trimedoxime, currently only available anti-tabun drugs.
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Affiliation(s)
- Lukas Gorecki
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Králové, Czech Republic.,Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic
| | - Ondrej Soukup
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Králové, Czech Republic.,Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic
| | - Tomas Kucera
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Králové, Czech Republic
| | - David Malinak
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic.,Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Králové, Czech Republic
| | - Daniel Jun
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Králové, Czech Republic.,Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic
| | - Kamil Kuca
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic.,Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Králové, Czech Republic
| | - Kamil Musilek
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic. .,Faculty of Science, Department of Chemistry, University of Hradec Kralove, Rokitanskeho 62, 500 03, Hradec Králové, Czech Republic.
| | - Jan Korabecny
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01, Hradec Králové, Czech Republic. .,Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic.
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da Silva FD, Nogara PA, Braga MM, Piccoli BC, Rocha JBT. Molecular docking analysis of acetylcholinesterase corroborates the protective effect of pralidoxime against chlorpyrifos-induced behavioral and neurochemical impairments in Nauphoeta cinerea. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.comtox.2018.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Experimental hydrophilic reactivator: bisoxime with three positive charges. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0612-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Agatonovic-Kustrin S, Kettle C, Morton DW. A molecular approach in drug development for Alzheimer's disease. Biomed Pharmacother 2018; 106:553-565. [PMID: 29990843 DOI: 10.1016/j.biopha.2018.06.147] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/20/2018] [Accepted: 06/27/2018] [Indexed: 01/08/2023] Open
Abstract
An increase in dementia numbers and global trends in population aging across the world prompts the need for new medications to treat the complex biological dysfunctions, such as neurodegeneration associated with dementia. Alzheimer's disease (AD) is the most common form of dementia. Cholinergic signaling, which is important in cognition, is slowly lost in AD, so the first line therapy is to treat symptoms with acetylcholinesterase inhibitors to increase levels of acetylcholine. Out of five available FDA-approved AD medications, donepezil, galantamine and rivastigmine are cholinesterase inhibitors while memantine, a N-methyl d-aspartate (NMDA) receptor antagonist, blocks the effects of high glutamate levels. The fifth medication consists of a combination of donepezil and memantine. Although these medications can reduce and temporarily slow down the symptoms of AD, they cannot stop the damage to the brain from progressing. For a superior therapeutic effect, multi-target drugs are required. Thus, a Multi-Target-Directed Ligand (MTDL) strategy has received more attention by scientists who are attempting to develop hybrid molecules that simultaneously modulate multiple biological targets. This review highlights recent examples of the MTDL approach and fragment based strategy in the rational design of new potential AD medications.
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Affiliation(s)
- Snezana Agatonovic-Kustrin
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Selangor Darul Ehsan, Malaysia; School of Pharmacy and Applied Science, La Trobe Institute for Molecular Sciences, La Trobe University, Edwards Rd., Bendigo, 3550, Australia.
| | - Christine Kettle
- School of Pharmacy and Applied Science, La Trobe Institute for Molecular Sciences, La Trobe University, Edwards Rd., Bendigo, 3550, Australia
| | - David W Morton
- School of Pharmacy and Applied Science, La Trobe Institute for Molecular Sciences, La Trobe University, Edwards Rd., Bendigo, 3550, Australia
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