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Tamaddon-Abibigloo Y, Dastmalchi S, Razzaghi-Asl N, Shahbazi Mojarrad J. Design, synthesis, in vitro and in silico evaluations of new isatin-triazine- aniline hybrids as potent anti- Alzheimer multi-target directed lead compounds. Bioorg Chem 2024; 147:107355. [PMID: 38657528 DOI: 10.1016/j.bioorg.2024.107355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 03/19/2024] [Accepted: 04/06/2024] [Indexed: 04/26/2024]
Abstract
Multi target directed ligands (MTDLs) are one of the promising tools for treatment of complex disease like Alzheimer's disease (AD). In this study, using rational design, we synthesized new 15 hybrids of the s-triazine, isatin and aniline derivatives as anti- AD compounds. The design was as way as that new compounds could had anti cholinesterase (ChE), antioxidant and biometal chelation ability. In vitro biological evaluation against ChE enzymes showed that these molecules were excellent inhibitors with IC50 values ranging from 0.2 nM to 734.5 nM for acetylcholinesterase (AChE), and 0.02 μM to 1.92 μM for butyrylcholinesterase (BChE). Among these compounds, 8 l with IC50 AChE = 0.7 nM, IC50 BChE = 0.09 μM and 8n with IC50 AChE = 0.2 nM, IC50 BChE = 0.03 μM were the most potent compounds. In silico studies showed that these molecules had key and effective interactions with the corresponding enzymes residues. The molecules with hydroxyl group on aniline moiety had also good antioxidant activity with EC50 values ranging from 64.2 μM to 103.6 μM. The UV-Vis spectroscopy study revealed that molecule 8n was also able to chelate biometals such as Zn2+, Cu2+and Fe2+ properly. It was concluded that these molecules could be excellent lead compounds for future studies.
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Affiliation(s)
- Yasaman Tamaddon-Abibigloo
- Department of Medicinal Chemistry, School of pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Siavoush Dastmalchi
- Department of Medicinal Chemistry, School of pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Faculty of Pharmacy, Near East University, Nicosia, North Cyprus, Turkey
| | - Nima Razzaghi-Asl
- Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Javid Shahbazi Mojarrad
- Department of Medicinal Chemistry, School of pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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Reza ASMA, Raihan R, Azam S, Shahanewz M, Nasrin MS, Siddique MAB, Uddin MN, Dey AK, Sadik MG, Alam AK. Experimental and pharmacoinformatic approaches unveil the neuropharmacological and analgesic potential of chloroform fraction of Roktoshirinchi (Achyranthes ferruginea Roxb.). J Ethnopharmacol 2024; 324:117769. [PMID: 38219886 DOI: 10.1016/j.jep.2024.117769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 01/07/2024] [Accepted: 01/11/2024] [Indexed: 01/16/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Achyranthes ferruginea (A. ferruginea) Roxb. is a common plant used in traditional medicine in Asia and Africa. It has a variety of local names, including "Gulmanci" in Nigeria, "Dangar" in Pakistan, "Thola" in Ethiopia, and "Roktoshirinchi" in Bangladesh. It is edible and has several ethnomedical uses for a wide range of illnesses, including hysteria, dropsy, constipation, piles, boils, asthma, and shigellosis. However, the neuropharmacological and analgesic potential of A. ferruginea remains uninvestigated. AIM OF THE STUDY To assess the neuropharmacological and analgesic potential of A. ferruginea through a multifaceted approach encompassing both experimental and computational models. MATERIALS AND METHODS Methanol was used to extract the leaves of A. ferruginea. It was then fractionated with low to high polar solvents (n-hexane, chloroform, ethyl acetate, and water) to get different fractions, including chloroform fraction (CLF). The study selected CLF at different doses and conducted advanced chemical element and proximate analyses, as well as phytochemical profiling using GC-MS. Toxicological studies were done at 300 μg per rat per day for 14 days. Cholinesterase inhibitory potential was checked using an in-vitro colorimetric assay. Acetic acid-induced writhing (AAWT) and formalin-induced licking tests (FILT) were used to assess anti-nociceptive effects. The forced swim test (FST), tail suspension test (TST), elevated plus maze (EPM), hole board test (HBT), and light and dark box test (LDB) were among the behavioral tests used to assess depression and anxiolytic activity. Network pharmacology-based analysis was performed on selected compounds using the search tool for interacting chemicals-5 (STITCH 5), Swiss target prediction tool, and search tool for the retrieval of interacting genes and proteins (STRING) database to link their role with genes involved in neurological disorders through gene ontology and reactome analysis. RESULTS Qualitative chemical element analysis revealed the presence of 15 elements, including Na, K, Ca, Mg, P, and Zn. The moisture content, ash value, and organic matter were found to be 11.12, 11.03, and 88.97%, respectively. GC-MS data revealed that the CLF possesses 25 phytoconstituents. Toxicological studies suggested the CLF has no effects on normal growth, hematological and biochemical parameters, or cellular organs after 14 days at 300 μg per rat. The CLF markedly reduced the activity of both acetylcholinesterase and butyrylcholinesterase (IC50: 56.22 and 13.22 μg/mL, respectively). Promising dose-dependent analgesic activity (p < 0.05) was observed in chemically-induced pain models. The TST and FST showed a dose-dependent substantial reduction in immobility time due to the CLF. Treatment with CLF notably increased the number of open arm entries and time spent in the EPM test at doses of 200 and 400 mg/kg b.w. The CLF showed significant anxiolytic activity at 200 mg/kg b.w. in the HBT test, whereas a similar activity was observed at 400 mg/kg b.w. in the EPM test. A notable increase in the amount of time spent in the light compartment was observed in the LDB test by mice treated with CLF, suggesting an anxiolytic effect. A network pharmacology study demonstrated the relationship between the phytochemicals and a number of targets, such as PPARA, PPARG, CHRM1, and HTR2, which are connected to the shown bioactivities. CONCLUSIONS This study demonstrated the safety of A. ferruginea and its efficacy in attenuating cholinesterase inhibitory activity, central and peripheral pain, anxiety, and depression, warranting further exploration of its therapeutic potential.
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Affiliation(s)
- A S M Ali Reza
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, 4318, Bangladesh.
| | - Riaj Raihan
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, 4318, Bangladesh.
| | - Saidul Azam
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, 4318, Bangladesh.
| | - Mohammed Shahanewz
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, 4318, Bangladesh.
| | - Mst Samima Nasrin
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, 4318, Bangladesh.
| | - Md Abu Bakar Siddique
- Institute of National Analytical Research and Service (INARS), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka, 1205, Bangladesh.
| | - Md Nazim Uddin
- Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka, 1205, Bangladesh.
| | - Anik Kumar Dey
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Md Golam Sadik
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Ahm Khurshid Alam
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
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Truong DH, Nguyen TLA, Alharzali N, Al Rawas HK, Taamalli S, Ribaucour M, Nguyen HL, El Bakali A, Ngo TC, Černušák I, Louis F, Dao DQ. Theoretical insights into the HO ●-induced oxidation of chlorpyrifos pesticide: Mechanism, kinetics, ecotoxicity, and cholinesterase inhibition of degradants. Chemosphere 2024; 350:141085. [PMID: 38163466 DOI: 10.1016/j.chemosphere.2023.141085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/28/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
The oxidation of the common pesticide chlorpyrifos (CPF) initiated by HO● radical and the risks of its degradation products were studied in the gaseous and aqueous phases via computational approaches. Oxidation mechanisms were investigated, including H-, Cl-, CH3- abstraction, HO●-addition, and single electron transfer. In both phases, HO●-addition at the C of the pyridyl ring is the most energetically favorable and spontaneous reaction, followed by H-abstraction reactions at methylene groups (i.e., at H19/H21 in the gas phase and H22/H28 in water). In contrast, other abstractions and electron transfer reactions are unfavorable. However, regarding the kinetics, the significant contribution to the oxidation of CPF is made from H-abstraction channels, mostly at the hydrogens of the methylene groups. CPF can be decomposed in a short time (5-8 h) in the gas phase, and it is more persistent in natural water with a lifetime between 24 days and 66 years, depending on the temperature and HO● concentration. Subsequent oxidation of the essential radical products with other oxidizing reagents, i.e., HO●, NO2●, NO●, and 3O2, gave primary neutral products P1-P15. Acute and chronic toxicity calculations estimate very toxic levels for CPF and two degradation products, P7w and P12w, in aquatic systems. The neurotoxicity of these products was investigated by docking and molecular dynamics. P7w and P12w show the most significant binding scores with acetylcholinesterases, while P8w and P13w are with butyrylcholinesterase enzyme. Finally, molecular dynamics illustrate stable interactions between CPF degradants and cholinesterase enzyme over a 100 ns time frame and determine P7w as the riskiest degradant to the neural developmental system.
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam.
| | - Nissrin Alharzali
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215, Bratislava, Slovakia
| | - Hisham K Al Rawas
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Sonia Taamalli
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France.
| | - Marc Ribaucour
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Hoang Linh Nguyen
- School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam; Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Viet Nam
| | - Abderrahman El Bakali
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Ivan Černušák
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215, Bratislava, Slovakia
| | - Florent Louis
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam
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Mlakić M, Odak I, Barić D, Talić S, Šagud I, Štefanić Z, Molčanov K, Lasić Z, Kovačević B, Škorić I. New resveratrol analogs as improved biologically active structures: Design, synthesis and computational modeling. Bioorg Chem 2024; 143:106965. [PMID: 38064804 DOI: 10.1016/j.bioorg.2023.106965] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/07/2023] [Accepted: 11/10/2023] [Indexed: 01/24/2024]
Abstract
New analogs of the well-known bioactive trihydroxy-stilbene resveratrol were synthesized to investigate their potential biological activity. The focus was on assessing their ability to inhibit cholinesterase enzymes (ChEs) and their antioxidative properties, which were thoroughly examined. New resveratrol analogs were synthesized through Wittig or McMurry reaction in moderate-to-good yields. In all synthetic pathways, mixtures of cis- and trans-isomers were obtained, then separated by chromatography, and trans-isomers were isolated as targeted structures. The stilbene derivatives underwent evaluation for antioxidant activity (AOA) using DPPH and CUPRAC assay, and their potential to inhibit acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) was also measured. The biological tests have shown that the same compounds exhibited significant antioxidative and butyrylcholinesterase inhibitory potential, as evidenced by lower IC50 values compared to the established standards, trans-resveratrol, and galantamine, respectively. Additionally, molecular docking of the selected synthesized potential inhibitors to the enzyme's active site was performed, followed by assessing the complex stability using molecular dynamics simulation lasting 100 ns. Lastly, the new compounds underwent examination to determine their potential mutagenicity.
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Affiliation(s)
- Milena Mlakić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10 000 Zagreb, Croatia
| | - Ilijana Odak
- Department of Chemistry, Faculty of Science and Education, University of Mostar, Matice hrvatske bb, 88 000 Mostar, Bosnia and Herzegovina.
| | - Danijela Barić
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, HR-10 000 Zagreb, Croatia
| | - Stanislava Talić
- Department of Chemistry, Faculty of Science and Education, University of Mostar, Matice hrvatske bb, 88 000 Mostar, Bosnia and Herzegovina
| | - Ivana Šagud
- Croatian Agency for Medicinal Products and Medical Devices, Ksaverska Cesta 4, HR-10 000 Zagreb, Croatia
| | - Zoran Štefanić
- Division of Physical Chemistry, Rudjer Bošković Institute, Bijenička cesta 54, HR-10 000 Zagreb, Croatia
| | - Krešimir Molčanov
- Division of Physical Chemistry, Rudjer Bošković Institute, Bijenička cesta 54, HR-10 000 Zagreb, Croatia
| | - Zlata Lasić
- Teva api Analytical R&D, Pliva, Prilaz Baruna Filipovića 25, HR-10 000 Zagreb, Croatia
| | - Borislav Kovačević
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, HR-10 000 Zagreb, Croatia.
| | - Irena Škorić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10 000 Zagreb, Croatia
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Ferdous R, Islam MB, Al-Amin MY, Dey AK, Mondal MOA, Islam MN, Alam AK, Rahman AA, Sadik MG. Anticholinesterase and antioxidant activity of Drynaria quercifolia and its ameliorative effect in scopolamine-induced memory impairment in mice. J Ethnopharmacol 2024; 319:117095. [PMID: 37634747 DOI: 10.1016/j.jep.2023.117095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 08/29/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Drynaria quercifolia is an epiphytic fern distributed all over Bangladesh with traditional use in treating neurological disorders and other ailments. Although several pharmacological activities of D. quercifolia have been investigated, the neuroprotective potential of this plant is still unexplored. AIM OF STUDY In this study, we evaluated the in vitro anticholinesterase and antioxidant activities of D. quercifolia and the neuroprotective effect in scopolamine-induced memory-impaired mouse model. MATERIALS AND METHODS The crude methanol extract (DCM) of the plant was fractionated to prepare n-hexane (DHF), chloroform (DCF), ethyl acetate (DEF), and aqueous (DAF) factions. All the fractions were evaluated for anticholinesterase activity by modified Ellman's method and the antioxidant activity by several in vitro assays such as DPPH and hydroxyl free radicals scavenging, reducing power, and inhibition of brain lipid peroxidation. The effect of the most active fractions (both DCF and DEF) on learning and memory was assessed in scopolamine-induced mouse model of memory-impairment by Morris water maze tasks. Biochemical assays were performed in brain tissue. The active compound was isolated and characterized by chromatographic, spectroscopic, and molecular docking methods. RESULTS Phytochemical analysis demonstrated a high content of phenolic and flavonoid in DEF. In vitro studies revealed a strong antioxidant power of DEF and anticholinesterase activity of DCF. Both the DCF and DEF significantly (P˂0.05) reduced the escape latency time in the Morris's water maze tasks, and increased the time spent in the northeast quadrant in the probe trial. Biochemical data demonstrated that treatment with DCF and DEF at different doses significantly (P˂0.0001) inhibited acetylcholinesterase activity, restored GSH levels, and reduced MDA levels in the brain of scopolamine-induced memory-impaired mice, indicating the protective effect of D. quercifolia, possibly by acetylcholinesterase inhibition and oxidative stress prevention. Chromatographic methods of separation led to he isolation of catechin and protocatechuric acid from DEF and 3,4-dihydroxy benzoic acid from DCF. The structure of the compounds was determined by studies of their 1H-NMR spectra. Molecular docking as well as in vitro study suggests the anticholinesterase and antioxidant activity of the isolated compounds. CONCLUSION Our study suggested that the extracts of D. quercifolia, due to anticholinesterase and antioxidant activity, ameliorate the scopolamine-induced memory impairment in mice and thus may represent therapeutics in the treatment of Alzheimer's disease.
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Affiliation(s)
- Rafia Ferdous
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Md Badrul Islam
- Bangladesh Council of Scientific and Industrial Research, Rajshahi Laboratories, Bangladesh, Rajshahi, 6206, Bangladesh.
| | - Md Yusuf Al-Amin
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Anik Kumar Dey
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | | | - Md Nurul Islam
- Department of Zoology, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Ahm Khurshid Alam
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Aziz Abdur Rahman
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
| | - Md Golam Sadik
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
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Kappenberg YG, Nogara PA, Stefanello FS, Delgado CP, Rocha JBT, Zanatta N, Martins MAP, Bonacorso HG. 1,2,3-Triazolo[4,5-b]aminoquinolines: Design, synthesis, structure, acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity, and molecular docking of novel modified tacrines. Bioorg Chem 2023; 139:106704. [PMID: 37453239 DOI: 10.1016/j.bioorg.2023.106704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/12/2023] [Accepted: 06/25/2023] [Indexed: 07/18/2023]
Abstract
An efficient [4 + 2] cyclization protocol to synthesize a series of twelve examples of 1,2,3-triazolo[4,5-b]aminoquinolines (5) as novel structurally modified tacrines was obtained by reacting readily accessible precursors (i.e., 3-alky(aryl)-5-amino-1,2,3-triazole-4-carbonitriles (3)) and selected cycloalkanones (4) of five-, six-, and seven-membered rings. We evaluated the AChE and BChE inhibitory activity of the novel modified tacrines 5, and the compound derivatives from cyclohexanone (4b) showed the best AChE and BChE inhibitory activities. Specifically, 1,2,3-triazolo[4,5-b]aminoquinolines 5bb obtained from 3-methyl-carbonitrile (3b) showed the highest AChE (IC50 = 12.01 μM), while 5ib from 3-sulfonamido-carbonitrile (3i) was the most significant inhibitor for BChE (IC50 = 1.78 μM). In general, the inhibitory potency of compound 5 was weaker than the pure tacrine reference, and our findings may help to design and develop novel anticholinesterase drugs based on modified tacrines.
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Affiliation(s)
- Yuri G Kappenberg
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Pablo A Nogara
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, 97105-900 - Santa Maria, RS, Brazil; Instituto Federal Sul-Rio-Grandense (IFSul), 96418-400- Bagé, RS, Brazil
| | - Felipe S Stefanello
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Cássia P Delgado
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, 97105-900 - Santa Maria, RS, Brazil
| | - João B T Rocha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, 97105-900 - Santa Maria, RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Helio G Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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Rosenberg YJ, Garcia K, Diener J, Gerk W, Donahue S, Mao L, Lees J, Jiang X, Urban LA, Sullivan D. The impact of solvents on the toxicity of the banned parathion insecticide. Chem Biol Interact 2023; 382:110635. [PMID: 37453609 PMCID: PMC10574261 DOI: 10.1016/j.cbi.2023.110635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/03/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
The aerial crop dusting and spraying of fields with the phosphorothioate insecticide parathion in the late 1900s, significantly improved crop yields but resulted in high levels of occupational toxicity in handlers and agricultural workers, as well as cases of intentional self-harm poisoning, culminating in its banning in many western countries by early 2000s. However because of the low solubility and volatility of parathion, most available products were formulated using organic solvents e.g. xylene, to increase the efficacy of the aerosols and dusts. In the present study, the toxicity of parathion was assessed when formulated in an aqueous solvents (ethanol/PBS (1:9)), and delivered to macaques as an aerosol. Doses of 780 μg/kg and 1.56 mg/kg were delivered one day apart, using a modified nebulizer calculated to result in lung deposition of ∼480 μg/kg with a similar or larger amount being swallowed; these doses being similar to the estimated lethal oral dose 286ug/kg - 1.43 mg/kg of formulated parathion in humans. Surprisingly, this dose (a combined amount of ∼14 mg) caused only low AChE inhibition and moderate BChE inhibition with no clinical symptoms, indicating that the use of organic solvents may have previously played a critical role in the severity of parathion toxicity following inhalation exposure. In addition, unlike constitutively toxic OPs, which are highly toxic when inhaled, these results are consistent with the idea that phosphorothioate insecticides appear to be more intoxicating following oral than inhalation exposure. However, this still remains uncertain because the presence of organic solvents in the ingested parathion studies was not always known.
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Dan W, Cao Y, Sun Y, Zhang J, Liu J, Gao J, Han R, Dai J. Novel N 1 or N 9 modified α-carboline analogues as potential ligands in Alzheimer's disease therapy: Synthesis and neurobiological activity evaluation. Bioorg Chem 2023; 133:106378. [PMID: 36736035 DOI: 10.1016/j.bioorg.2023.106378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/05/2023] [Accepted: 01/14/2023] [Indexed: 01/20/2023]
Abstract
A series of new α-carboline analogues modified at N1 or N9 positions by alkyl, benzyl and phenyl were synthesized and characterized as potential ligands for AD therapy. These compounds exhibited multifunctional neurobiological activities including anti-neuroinflammatory, neuroprotective and cholinesterase inhibition. Among them, compound 5d with good drug-like properties and no cytotoxicity, showed potent inhibitory activity against NO production (IC50 = 1.45 μM), which could suppress the expression levels of iNOS and COX-2 in a dose-dependent manner. Further mechanism exploration indicated that compound 5d could regulate the NF-κB signaling pathway by decreasing the phosphorylation of IκB-α and p65. Notably, compound 5d could effectively decrease the LPS-induced aberrations in zebrafish. Compounds 3b, 4f, 5c, 5g, 5m and 6i exhibited potential neuroprotective activity (cell viability > 70 %) in the H2O2-induced PC-12 neuronal death model and rescued the SOD activity. In particular, compounds 3b, 4f, and 5g activated the Nrf2 signaling pathway, and improved the expressions of antioxidant proteins NQO-1 and HO-1, which alleviated the head cell apoptosis in zebrafish. Additionally, compound 6i exhibited potential inhibitory activity against BuChE with IC50 of 0.77 μM. Overall, this work provided some lead compounds based on α-carboline used for AD therapy.
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Affiliation(s)
- Wenjia Dan
- School of Life Science and Technology, Weifang Medical University, Shandong, China
| | - Yidan Cao
- School of Life Science and Technology, Weifang Medical University, Shandong, China
| | - Yifan Sun
- School of Life Science and Technology, Weifang Medical University, Shandong, China
| | - Jiaoyue Zhang
- School of Life Science and Technology, Weifang Medical University, Shandong, China
| | - Jinyi Liu
- School of Life Science and Technology, Weifang Medical University, Shandong, China
| | - Jixiang Gao
- School of Life Science and Technology, Weifang Medical University, Shandong, China
| | - Rui Han
- Institute of Basic and Transitional Medicine, Xi'an Medical University, Shannxi, China.
| | - Jiangkun Dai
- School of Life Science and Technology, Weifang Medical University, Shandong, China.
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Punmiya A, Prabhu A. Structural fingerprinting of pleiotropic flavonoids for multifaceted Alzheimer's disease. Neurochem Int 2023; 163:105486. [PMID: 36641110 DOI: 10.1016/j.neuint.2023.105486] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 12/13/2022] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
Alzheimer's disease has emerged as one of the most challenging neurodegenerative diseases associated with dementia, loss of cognitive functioning and memory impairment. Despite enormous efforts to identify disease modifying technologies, the repertoire of currently approved drugs consists of a few symptomatic candidates that are not capable of halting disease progression. Moreover, these single mechanism drugs target only a small part of the pathological cascade and do not address most of the etiological basis of the disease. Development of therapies that are able to simultaneously tackle all the multiple interlinked causative factors such as amyloid protein aggregation, tau hyperphosphorylation, cholinergic deficit, oxidative stress, metal dyshomeostasis and neuro-inflammation has become the focus of intensive research in this domain. Flavonoids are natural phytochemicals that have demonstrated immense potential as medicinal agents due to their multiple beneficial therapeutic effects. The polypharmacological profile of flavonoids aligns well with the multifactorial pathological landscape of Alzheimer's disease, making them promising candidates to overcome the challenges of this neurodegenerative disorder. This review presents a detailed overview of the pleiotropic biology of flavonoids favourable for Alzheimer therapeutics and the structural basis for these effects. Structure activity trends for several flavonoid classes such as flavones, flavonols, flavanones, isoflavones, flavanols and anthocyanins are comprehensively analyzed in detail and presented.
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Affiliation(s)
- Amisha Punmiya
- Department of Quality Assurance, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
| | - Arati Prabhu
- Department of Quality Assurance, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India.
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Shaikh S, Dhavan P, Singh P, Uparkar J, Vaidya SP, Jadhav BL, Ramana MMV. Design, synthesis and biological evaluation of novel antipyrine based α-aminophosphonates as anti-Alzheimer and anti-inflammatory agent. J Biomol Struct Dyn 2023; 41:386-401. [PMID: 34878960 DOI: 10.1080/07391102.2021.2006088] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Herein, a series of novel antipyrine based α-aminophosphonates derivatives were synthesized and characterized. The synthesized derivatives were subjected for in vitro cholinesterase inhibition, enzyme kinetic studies, protein denaturation assay, proteinase inhibitory assay and cell viability assay. For cholinesterase inhibition, the results inferred that the test compounds possess better AChE activity (0.46 to 6.67 µM) than BuChE (2.395 to 12.47 µM). Compound 4j inhibited both AChE and BuChE (IC50 = 0.475 ± 0.12 µM and 2.95 ± 0.16 µM, respectively), implying that it serves as a dual AChE/BuChE inhibitor. Also, kinetic studies revealed that compound 4j exhibits mixed-type inhibition against both AChE and BuChE, with Ki values of 3.003 µM and 5.750 µM, respectively. Further, protein denaturation and proteinase inhibitory assays were used to test in vitro anti-inflammatory potential. It was found that compound 4o exhibited highest activity against protein denaturation (IC50 = 42.64 ± 0.19 µM) and proteinase inhibition (IC50 = 37.57 ± 0.19 µM) when compared to diclofenac. In addition, cell viability assay revealed that active compounds possess no cytotoxicity against N2a cell and RAW 264.7 macrophages. Finally, molecular docking experiments for AChE, BuChE, and COX-2 were conducted to better understand the binding modes of active compounds.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sarfaraz Shaikh
- Department of Chemistry, University of Mumbai, Santacruz East, Mumbai, India
| | - Pratik Dhavan
- Department of Life sciences, University of Mumbai, Santacruz East, Mumbai, India
| | - Pinky Singh
- Department of Microbiology, Haffkine Institute, Parel, Mumbai, India
| | - Jasmin Uparkar
- Department of Chemistry, University of Mumbai, Santacruz East, Mumbai, India
| | - S P Vaidya
- Department of Microbiology, Haffkine Institute, Parel, Mumbai, India
| | - B L Jadhav
- Department of Life sciences, University of Mumbai, Santacruz East, Mumbai, India
| | - M M V Ramana
- Department of Chemistry, University of Mumbai, Santacruz East, Mumbai, India
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11
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Narváez C, Sabat P, Sanchez-Hernandez JC. Synergistic effects of pesticides and environmental variables on earthworm standard metabolic rate. Comp Biochem Physiol C Toxicol Pharmacol 2022; 260:109404. [PMID: 35788402 DOI: 10.1016/j.cbpc.2022.109404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 11/03/2022]
Abstract
Endogeic earthworms such as Aporrectodea caliginosa play an essential role in the agroecosystems because of their continuous burrowing and feeding (geophagous) activity, which causes a profound impact on soil texture, organic matter decomposition, soil carbon storage, microbial activity, soil biodiversity, and nutrient cycling. Accordingly, endogeic earthworms are being proposed as suitable candidates for the ecotoxicity assessment of polluted soils. However, terrestrial ecotoxicology has little considered the interactive effects from pollutants and environmental variables (temperature, moisture). We acclimatized A. caliginosa for 90 days to two contrasting temperatures (10 °C and 20 °C) and moistures (25 % and 35 %, w/v) in soils contaminated with 20 mg kg-1 of chlorpyrifos to examine how these two climate change drivers may modulate the pesticide toxicity. We measured the inhibition of cholinesterase (ChE) activities as indicators of organophosphorus exposure, the standard metabolic rate as an integrative physiological biomarker, and the lipid peroxidation (TBARS) and the total antioxidant capacity (TAC) both as indicators of oxidative stress. The main results were: i) chlorpyrifos strongly inhibited ChE activity (>75 % of controls), demonstrating earthworm bioavailability and acute toxicity at the test concentration; 2) a 50 % mortality and loss of body weight (49 %) were found in the earthworms exposed to the most severe environmental conditions (20 °C, 25 %, and pesticide); 3) this latter experimental group displayed a high SMR, which was concomitant with an increase of the oxidative balance index (TBARS/TAC). We postulated that earthworms acclimatized to stressing environmental conditions experienced a higher pesticide-induced metabolic cost and physiological challenges imposed by adverse environmental conditions.
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Affiliation(s)
- Cristóbal Narváez
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile; Center of Applied Ecology and Sustainability (CAPES), Santiago, Chile; Laboratory of Ecotoxicology, Institute of Environmental Sciences, University of Castilla-La Mancha, 45071 Toledo, Spain
| | - Pablo Sabat
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile; Center of Applied Ecology and Sustainability (CAPES), Santiago, Chile. https://twitter.com/@sabatkirkwood
| | - Juan C Sanchez-Hernandez
- Laboratory of Ecotoxicology, Institute of Environmental Sciences, University of Castilla-La Mancha, 45071 Toledo, Spain.
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Zhang H, Peng Y, Zhuo L, Wang Y, Zeng G, Wang S, Long L, Li X, Wang Z. Recent advance on pleiotropic cholinesterase inhibitors bearing amyloid modulation efficacy. Eur J Med Chem 2022; 242:114695. [PMID: 36044812 DOI: 10.1016/j.ejmech.2022.114695] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/13/2022] [Accepted: 08/14/2022] [Indexed: 12/15/2022]
Abstract
Due to the hugely important roles of neurotransmitter acetylcholine (ACh) and amyloid-β (Aβ) in the pathogenesis of Alzheimer's disease (AD), the development of multi-target directed ligands (MTDLs) focused on cholinesterase (ChE) and Aβ becomes one of the most attractive strategies for combating AD. To date, numerous preclinical studies toward multifunctional conjugates bearing ChE inhibition and anti-Aβ aggregation have been reported. Noteworthily, most of the reported multifunctional cholinesterase inhibitors are carbamate-based compounds due to the initial properties of carbamate moiety. However, because their easy hydrolysis in vivo and the instability of the compound-enzyme conjugate, the mechanism of action of these compounds is rare. Thus, non-carbamate compounds are of great need for developing novel cholinesterase inhibitors. Besides, given that Aβ accumulation begins to occur 10-15 years before AD onset, modulating Aβ is ineffective only in inhibiting its aggregation but not eliminate the already accumulated Aβ if treatment is started when the patient has been diagnosed as AD. Considering the limitation of current Aβ accumulation modulators in ameliorating cognitive deficits and ineffectiveness of ChE inhibitors in blocking disease progression, the development of a practically valuable strategy with multiple pharmaceutical properties including ChE inhibition and Aβ modulation for treating AD is indispensable. In this review, we focus on summarizing the scaffold characteristics of reported non-carbamate cholinesterase inhibitors with Aβ modulation since 2020, and understanding the ingenious multifunctional drug design ideas to accelerate the pace of obtaining more efficient anti-AD drugs in the future.
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Mlakić M, Odak I, Faraho I, Talić S, Bosnar M, Lasić K, Barić D, Škorić I. New naphtho/thienobenzo-triazoles with interconnected anti-inflammatory and cholinesterase inhibitory activity. Eur J Med Chem 2022; 241:114616. [PMID: 35870364 DOI: 10.1016/j.ejmech.2022.114616] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 11/26/2022]
Abstract
New 1,2,3-triazolo(thieno)stilbenes were synthesized by Wittig reaction and photochemically transformed to corresponding substituted thienobenzo/naphtho-triazoles in high isolated yields. They were prepared to study the acetyl- and butyrylcholinesterase inhibition associated with the inhibition of TNFα cytokine production and anti-inflammatory activity. The best experimental results were achieved with the allyl-thienobenzotriazole and isopropyl, p-methoxybenzyl, and hydroxybutyl substituted naphthotriazoles bearing additional chloro or methoxy groups. The allyl-thienobenzotriazole photoproduct is twice as potent an inhibitor of eqBChE compared to the standard galantamine. At the same time, this compound strongly inhibited TNFα production in PBMCs in response to the LPS stimulus. The complexes between selected compounds with the active site of BChE and AChE are assessed by docking, providing insight into the stabilizing interactions between the potential inhibitor and the active site.
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Affiliation(s)
- Milena Mlakić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10 000, Zagreb, Croatia
| | - Ilijana Odak
- Department of Chemistry, Faculty of Science and Education, University of Mostar, Matice hrvatske bb, 88 000, Mostar, Bosnia and Herzegovina
| | - Ivan Faraho
- Pharmacology in vitro, Selvita Ltd., Prilaz baruna Filipovića 29, HR-10 000, Zagreb, Croatia.
| | - Stanislava Talić
- Department of Chemistry, Faculty of Science and Education, University of Mostar, Matice hrvatske bb, 88 000, Mostar, Bosnia and Herzegovina
| | - Martina Bosnar
- Pharmacology in vitro, Selvita Ltd., Prilaz baruna Filipovića 29, HR-10 000, Zagreb, Croatia
| | - Kornelija Lasić
- Teva api Chemical R&D, Pliva, Prilaz Baruna Filipovića 25, HR-10 000, Zagreb, Croatia
| | - Danijela Barić
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, HR-10 000, Zagreb, Croatia
| | - Irena Škorić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10 000, Zagreb, Croatia.
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Baussanne I, Firstova O, Dediu AB, Larosa C, Furdui B, Ghinea IO, Thomas A, Chierici S, Dinica R, Demeunynck M. Interest of novel N-alkylpyridinium-indolizine hybrids in the field of Alzheimer's disease: Synthesis, characterization and evaluation of antioxidant activity, cholinesterase inhibition, and amyloid fibrillation interference. Bioorg Chem 2021; 116:105390. [PMID: 34670332 DOI: 10.1016/j.bioorg.2021.105390] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/17/2021] [Accepted: 09/26/2021] [Indexed: 12/17/2022]
Abstract
A small library of molecules combining indolizine and N-alkyl pyridinium was synthesized and evaluated in a multi-target-directed-ligand strategy for Alzheimer's disease (AD) treatment. The new compounds were classified in three series depending on the number of methylene residues linking the two heterocycles (Ind-PyCx with x = 0, 2 or 3). The molecules were synthesized from the corresponding bis-pyridines by two-step formation of the indolizine core including mono-alkylation of pyridine and 1,3-dipolar cycloaddition with an alkylpropiolate. Their activities against AD's key-targets were evaluated in vitro: acetyl- and butyrylcholinesterase (AChE and BChE) inhibition, antioxidant properties and inhibition of amyloid fibril formation. None of the three series showed significant activities against all the targets. The Ind-PyC2 and Ind-PyC3 series are active on eeAChE and hAChE (µM IC50 values). Most of the positively charged molecules from these two series also appeared active against eqBChE, however they lost their activity on hBChE. Comparative molecular modeling of 13 and 15 docked in hAChE and hBChE highlighted the importance of the substituent (p-methoxybenzoyl or methyloxycarbonyl, respectively) located on the indolizine C-3 for the binding. The larger molecule 13 fits more tightly at the active site of the two enzymes than 15 that shows a larger degree of freedom. The Ind-PyC2 and Ind-PyC3 hybrids displayed some antioxidant activity when tested at 750 µg/mL (up to 95% inhibition of DPPH radical scavenging for 10). In both series, most hybrids were also able to interact with amyloid fibers, even if the inhibitory effect was observed at a high 100 µM concentration. The Ind-PyC0 molecules stand out completely due to their spectroscopic properties which prevent their evaluation by Ellman's and ThT assays. However, these molecules showed interesting features in the presence of preformed fibers. In particular, the strong increase in fluorescence of 3 in the presence of amyloid fibers is very promising for its use as a fibrillation fluorescent reporter dye.
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Affiliation(s)
| | - Olga Firstova
- Univ. Grenoble Alpes, CNRS, DPM, Grenoble, France; Univ. Grenoble Alpes, CNRS, DCM, Grenoble, France
| | - Andreea Botezatu Dediu
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania
| | | | - Bianca Furdui
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania
| | - Ioana Ottilia Ghinea
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania
| | - Aline Thomas
- Univ. Grenoble Alpes, CNRS, DPM, Grenoble, France
| | | | - Rodica Dinica
- Dunarea de Jos University of Galaţi, Faculty of Science and Environment, 111 Domneasca Street, 800201 Galaţi, Romania.
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15
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Islam MA, Zaman S, Biswas K, Al-Amin MY, Hasan MK, Alam AHMK, Tanaka T, Sadik G. Evaluation of cholinesterase inhibitory and antioxidant activity of Wedelia chinensis and isolation of apigenin as an active compound. BMC Complement Med Ther 2021; 21:204. [PMID: 34315449 PMCID: PMC8317308 DOI: 10.1186/s12906-021-03373-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 06/30/2021] [Indexed: 12/14/2022] Open
Abstract
Background Wedelia chinensis has been reported as a folk medicine for the treatment of different diseases including neurodegenerative disease. Although the plant has been studied well for diverse biological activities, the effect of this plant in neurological disorder is largely unknown. The present study was undertaken to evaluate the cholinesterase inhibitory and antioxidant potential of W. chinensis. Methods The extract and fractions of the plant were evaluated for acetylcholinesterase and butyrylcholinesterase inhibitory activity by modified Ellman method. The antioxidant activity was assessed in several in vitro models/assays such as reducing power, total antioxidant capacity, total phenolic and flavonoid content, scavenging of 2,2′-diphenyl-1-picrylhydrazyl (DPPH) free radical and hydroxyl radical, and inhibition of brain lipid peroxidation. Chromatographic and spectroscopic methods were used to isolate and identify the active compound from the extract. Results Among the fractions, aqueous fraction (AQF) and ethylacetate fraction (EAF) exhibited high inhibition against acetylcholinesterase (IC50: 40.02 ± 0.16 μg/ml and 57.76 ± 0.37 μg/ml) and butyrylcholinesterase (IC50: 31.79 ± 0.18 μg/ml and 48.41 ± 0.05 μg/ml). Similarly, the EAF and AQF had high content of phenolics and flavonoids and possess strong antioxidant activity in several antioxidant assays including DPPH and hydroxyl radical scavenging, reducing power and total antioxidant activity. They effectively inhibited the peroxidation of brain lipid in vitro with IC50 values of 45.20 ± 0.10 μg/ml and 25.53 ± 0.04 μg/ml, respectively. A significant correlation was observed between total flavonoids and antioxidant and cholinesterase inhibitory activity. Activity guided chromatographic separation led to the isolation of a major active compound from the EAF and its structure was elucidated as apigenin by spectral analysis. Conclusions The potential ability of W. chinensis to inhibit the cholinesterase activity and peroxidation of lipids suggest that the plant might be useful for the management of AD. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-021-03373-4.
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Affiliation(s)
- Md Aminul Islam
- Department of Chemistry, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Shahed Zaman
- Department of Chemistry, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Kushal Biswas
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Md Yusuf Al-Amin
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Md Kamrul Hasan
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - A H M K Alam
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | | | - Golam Sadik
- Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
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Koca M, Bilginer S. New benzamide derivatives and their nicotinamide/cinnamamide analogs as cholinesterase inhibitors. Mol Divers 2021; 26:1201-1212. [PMID: 34165688 DOI: 10.1007/s11030-021-10249-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/07/2021] [Indexed: 11/26/2022]
Abstract
In this study, a total of 18 new benzamide/ nicotinamide/ cinnamamide derivative compounds were designed and synthesized for the first time (except B1 and B5) by conventional and microwave irradiation methods. The chemical structures of the synthesized compounds were characterized by 1H NMR, 13C NMR, and HRMS spectra. In vitro acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) inhibition effects of the compounds were evaluated to find out new possible drug candidate molecule/s. According to the inhibition results, the IC50 values of the compounds synthesized were in the range of 10.66-83.03 nM towards AChE, while they were in the range of 32.74-66.68 nM towards BuChE. Tacrine was used as the reference drug and its IC50 values were 20.85 nM and 15.66 nM towards AChE and BuChE, respectively. The most active compounds B4 (IC50: 15.42 nM), N4 (IC50: 12.14 nM), and C4 (IC50: 10.67 nM) in each series towards AChE were docked at the binding site of AChE enzyme to explain the inhibitory activities of each series. On the other hand, the compounds B4, N4, and C4 showed satisfactory pharmacokinetic properties via the prediction of ADME profiles.
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Affiliation(s)
- Mehmet Koca
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University, TR-25240, Erzurum, Turkey.
| | - Sinan Bilginer
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University, TR-25240, Erzurum, Turkey
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Mooko T, Bala A, Tripathy S, Kumar CS, Mahadevappa CP, Chaudhary SK, Matsabisa MG. Cannabis Sativa L. Flower and Bud Extracts inhibited In vitro Cholinesterases and b-Secretase Enzymes Activities: Possible Mechanisms of Cannabis use in Alzheimer Disease. Endocr Metab Immune Disord Drug Targets 2021; 22:297-309. [PMID: 33618651 DOI: 10.2174/1871530321666210222124349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/19/2020] [Accepted: 12/30/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND There are anecdotal claims on the use of Cannabis sativa L. in the treatment of Alzheimer's disease, but there is lack of scientific data to support the efficacy and safety of Cannabis sativa L. for Alzheimer's disease. AIM The aim of the study was to evaluate the effect of aerial parts of Cannabis sativa L. on the cholinesterases and β-secretase enzyme activity as one of the possible mechanisms of Alzheimer's disease. METHODS The phytochemical and heavy metal contents were analysed. The extracts were screened for acetylcholinesterase, butyrylcholinesterase and β-secretase activity. Cytotoxicity of extracts was performed in normal vero and pre-adipocytes cell lines. The extracts were characterized using high performance thin layer chromatography and high-performance liquid chromatography for their chemical fingerprints. Alkaloids, flavonoids and glycosides were present amongst the tested phytochemicals. Cannabidiol concentrations were comparatively high in the hexane and dichloromethane than in dichloromethane: methanol (1:1) and methanol extracts. RESULTS Hexane and dichloromethane extracts showed a better inhibitory potential towards cholinesterase activity, while water, hexane, dichloromethane: methanol (1:1) and methanol showed an inhibitory potential towards β-secretase enzyme activity. All extracts showed no cytotoxic effect on pre-adipocytes and vero cells after 24- and 48-hours of exposure. CONCLUSION Therefore, this may explain the mechanism through which AD symptoms may be treated and managed by Cannabis sativa L. extracts.
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Affiliation(s)
- Teboho Mooko
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
| | - Asis Bala
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
| | - Satyajit Tripathy
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
| | - Chethan S Kumar
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
| | - Chandrashekara P Mahadevappa
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
| | - Sushil K Chaudhary
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
| | - Motlalepula G Matsabisa
- Department of Pharmacology, Indigenous Knowledge System Unit, Faculty of Health Sciences, University of the Free State, Bloemfontein 9300. South Africa
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18
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Kiełczewska U, Jorda R, Gonzalez G, Morzycki JW, Ajani H, Svrčková K, Štěpánková Š, Wojtkielewicz A. The synthesis and cholinesterase inhibitory activities of solasodine analogues with seven-membered F ring. J Steroid Biochem Mol Biol 2021; 205:105776. [PMID: 33130020 DOI: 10.1016/j.jsbmb.2020.105776] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/22/2020] [Accepted: 10/20/2020] [Indexed: 10/23/2022]
Abstract
Solasodine analogues containing a seven-membered F ring with a nitrogen atom placed at position 22a were prepared from diosgenin or tigogenin in a four-step synthesis comprising of the simultaneous opening of the F-ring and introduction of cyanide in position 22α, activation of the 26-hydroxyl group as mesylate, nitrile reduction, and N-cyclization. Solasodine, six obtained 22a(N)-homo analogues, as well as four 26a-homosolasodine derivatives and their open-chain precursors (13 in total) were tested as potential inhibitors of acetyl- and butyryl-cholinesterases and showed activity at micromolar concentrations. The structure-activity relationship study revealed that activities against studied esterases are affected by the structure of E/F rings and the substitution pattern of ring A. The most potent compound 8 acted as non-competitive inhibitors and exerted IC50 = 8.51 μM and 7.05 μM for eeAChE and eqBChE, respectively. Molecular docking studies revealed the hydrogen bond interaction of 8 with S293 of AChE; further rings are stabilized via hydrophobic interaction (ring A) or interaction with Y341 and W286 (rings B and C). Biological experiments showed no neurotoxicity of differentiated SH-SY5Y cells. More importantly, results from neuroprotective assay based on glutamate-induced cytotoxicity revealed that most derivatives had the ability to increase the viability of differentiated SH-SY5Y cells in comparison to galantamine and lipoic acid assayed as standards. The newly synthesized solasodine analogues are able to inhibit and to bind cholinesterases in noncompetitive mode of inhibition and exhibited neuroprotection potential of differentiated neuroblastoma cells after Glu-induced toxicity.
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Affiliation(s)
- Urszula Kiełczewska
- Faculty of Chemistry, University of Białystok, K. Ciołkowskiego 1K, 15-245, Białystok, Poland
| | - Radek Jorda
- Laboratory of Growth Regulators, Palacký University & Institute of Experimental Botany of The Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic; Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 77900, Olomouc, Czech Republic
| | - Gabriel Gonzalez
- Laboratory of Growth Regulators, Palacký University & Institute of Experimental Botany of The Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic; Department of Neurology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - Jacek W Morzycki
- Faculty of Chemistry, University of Białystok, K. Ciołkowskiego 1K, 15-245, Białystok, Poland
| | - Haresh Ajani
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nam. 2, 166 10, Prague 6, Czech Republic
| | - Katarína Svrčková
- Department of Biological and Biochemical Sciences, Faculty of Technology, University of Pardubice, Czech Republic
| | - Šárka Štěpánková
- Department of Biological and Biochemical Sciences, Faculty of Technology, University of Pardubice, Czech Republic
| | - Agnieszka Wojtkielewicz
- Faculty of Chemistry, University of Białystok, K. Ciołkowskiego 1K, 15-245, Białystok, Poland.
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Onder S, Sari S, Tacal O. Inhibition of cholinesterases by safranin O: Integration of inhibition kinetics with molecular docking simulations. Arch Biochem Biophys 2021; 698:108728. [PMID: 33345803 DOI: 10.1016/j.abb.2020.108728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/03/2020] [Accepted: 12/08/2020] [Indexed: 12/11/2022]
Abstract
In the present study, the inhibitory mechanisms and effects of a synthetic phenazine dye, safranin O (SO) on human plasma butyrylcholinesterase (BChE), human erythrocyte acetylcholinesterase (AChE) and recombinant BChE mutants were investigated. Kinetic studies showed the following information: SO leaded to linear competitive inhibition of human plasma BChE with Ki = 0.44 ± 0.085 μM; α = ∞. It acted as a hyperbolic noncompetitive inhibitor of human erythrocyte AChE with Ki = 0.69 ± 0.13; α = 1; β = 0.08 ± 0.02. On the other hand, the inhibitory effects of SO on two BChE mutants, where A328 was modified to either F or Y, revealed differences in terms of inhibitory patterns and Ki values, compared to the obtained results with recombinant wild type BChE. SO was found to act as a linear competitive inhibitor of A328F and A328Y BChE mutants. Compared to recombinant wild type BChE, A328Y and A328F BChE mutants caused a 4- and 10-fold decrease in Ki value for SO, respectively. These findings were supported by molecular modelling studies. In conclusion, SO is a potent inhibitor of human cholinesterases and may be useful in the design and development of new drugs for the treatment of AD.
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Orhan IE. Cholinesterase Inhibitory Potential of Quercetin towards Alzheimer's Disease - A Promising Natural Molecule or Fashion of the Day? - A Narrowed Review. Curr Neuropharmacol 2020; 19:2205-2213. [PMID: 33213346 PMCID: PMC9185776 DOI: 10.2174/1570159x18666201119153807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 10/22/2020] [Accepted: 11/15/2020] [Indexed: 11/22/2022] Open
Abstract
Natural substances are known to have strong protective effects against neurodegenerative diseases. Among them, phenolic compounds, especially flavonoids, come to the fore with their neuroprotective effects. Since quercetin, which is found in many medicinal plants and foods, is also taken through diet, its physiological effects on humans are imperative. Many studies have been published up to date on the neuroprotective properties of quercetin, a flavanol derivative. However, there is no review published so far summarizing the effect of quercetin on the cholinesterase (ChE) enzymes related to the cholinergic hypothesis, which is one of the pathological mechanisms of Alzheimer's disease (AD). However, ChE inhibitors regardless of natural or synthetic play a vital role in the treatment of AD. Although the number of studies on the ChE inhibitory effect of quercetin is limited, it deserves to be discussed in a review article. With this sensitivity, the neuroprotective effect of quercetin against AD through ChE inhibition was scrutinized in the current review study. In addition, studies on the bioavailability of quercetin and its capacity to cross the blood-brain barrier and how this capacity and bioavailability can be increased were given. Generally, studies containing data published in recent years were obtained from search engines such as PubMed, Scopus, and Medline and included herein. Consequently, quercetin should not be considered as a fashionable natural compound and should be identified as a promising compound, especially with increased bioavailability, for the treatment of AD.
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Affiliation(s)
- Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara. Turkey
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Moussa Z, Al-Mamary M, Al-Juhani S, Ahmed SA. Preparation and biological assessment of some aromatic hydrazones derived from hydrazides of phenolic acids and aromatic aldehydes. Heliyon 2020; 6:e05019. [PMID: 33024857 PMCID: PMC7527643 DOI: 10.1016/j.heliyon.2020.e05019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/03/2020] [Accepted: 09/18/2020] [Indexed: 11/23/2022] Open
Abstract
There has been substantial interest over the past many years in the design of novel chemical compounds containing the azomethine group (-NH-N=CH) and exhibiting various medicinal properties such as antibacterial, antiviral, antifungal, and anti-inflammatory activities. Herein, hydrazones were synthesized via the chemical reaction of substituted aromatic hydrazides with various aromatic aldehydes. The obtained products were confirmed using different physical and spectroscopic techniques, such as m.p., IR, 1H-NMR and 13C-NMR. The present study was designed to synthesize different aromatic hydrazones assembled by various combinations of aromatic hydrazides and aromatic benzaldehydes containing different substituents such as hydroxyl and polyhydroxyl groups as key structural features. Thus, incorporating such moieties and simultaneously creating highly-conjugated systems was expected to create novel species to mimic as much as possible natural phenolics, chalcones and stilbenes. Compounds of aromatic hydrazones synthesized in the present study were tested in vitro for their direct and indirect antioxidant activities using different methods such as DPPH, ABTS and FTC. The antioxidant activities of the new compounds ranged from very weak to very high activity. In addition, the inhibition of tyrosinase and cholinesterase by these compounds was tested. The new compounds containing two or three hydroxyl groups attached to aldehyde rings exhibited significantly greater inhibition effects on tyrosinase or cholinesterase activities in comparison to other compounds of the same series containing only one hydroxyl group.
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Affiliation(s)
- Ziad Moussa
- Department of Chemistry, College of Science, United Arab Emirates University, P.O. Box 15551, Al Ain, United Arab Emirates
| | - Mohammed Al-Mamary
- Chemistry Department, Faculty of Science, Taibah University, PO Box 30002, Code, 14177, Al Madinah Al Almunawarrah, Saudi Arabia
| | - Sultan Al-Juhani
- Chemistry Department, Faculty of Science, Taibah University, PO Box 30002, Code, 14177, Al Madinah Al Almunawarrah, Saudi Arabia
| | - Saleh A. Ahmed
- Chemistry Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
- Department of Chemistry, Faculty of Science, Assiut University, 71516 Assiut, Egypt
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Dourson M, Gadagbui B, Onyema C, McGinnis P. A commentary on some epidemiology data for chlorpyrifos. Regul Toxicol Pharmacol 2020; 113:104616. [PMID: 32119975 DOI: 10.1016/j.yrtph.2020.104616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 10/18/2019] [Accepted: 02/18/2020] [Indexed: 11/18/2022]
Abstract
Extensive animal and human studies on chlorpyrifos (CPF) point to changes in a blood enzyme as its first biological effect, and governments and health groups around the world have used this effect in the determination of its safe dose. Preventing this first biological effect, referred to in risk assessment parlance as the critical effect, is part and parcel of chemical regulation in general and of CFP specifically. Rauh et al. (2011), one of the published studies from the Columbia Center for Children's Environmental Health (CCCEH), reported evidence of deficits in Working Memory Index and Full-Scale IQ in children at 7 years old as a function of prenatal CPF exposures that are much lower than levels causing cholinesterase inhibition. Since the raw data on which Rauh et. al. (2011) publicly-funded (in part) findings were based have not been made available despite repeated requests, we show extracted data in Fig. 1A and 1E of Rauh et al. (2011), and plotted these extracted data as response versus log dose, a common risk assessment approach. Surprisingly, a significant portion of the data stated to be available in Rauh et al. (2011) were not found in these published figures, perhaps due to data point overlay. However, the reported associations of chlorpyrifos levels with Working Memory and Full Scale IQ were also not replicated in our analysis due perhaps to this missing data. Multiple requests were made to Rauh et al. (2011) for access to data from this, in part, publicly funded study, so that confirmation could be attempted. This general lack of data and inconsistency with cholinergic responses in other researches raises concerns about the lack of data transparency.
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Affiliation(s)
- Michael Dourson
- Toxicology Excellence for Risk Assessment (TERA), 1250 Ohio Pike, Suite 197, Amelia, OH, 45102, United States.
| | - Bernard Gadagbui
- Toxicology Excellence for Risk Assessment (TERA), 1250 Ohio Pike, Suite 197, Amelia, OH, 45102, United States.
| | - Chijioke Onyema
- Toxicology Excellence for Risk Assessment (TERA), 1250 Ohio Pike, Suite 197, Amelia, OH, 45102, United States.
| | - Patricia McGinnis
- Toxicology Excellence for Risk Assessment (TERA), 1250 Ohio Pike, Suite 197, Amelia, OH, 45102, United States.
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Karumuri SB, Singh H, Naqvi S, Mishra A, Flora SJS. Impact of chronic low dose exposure of monocrotophos in rat brain: Oxidative/ nitrosative stress, neuronal changes and cholinesterase activity. Toxicol Rep 2019; 6:1295-303. [PMID: 31867220 DOI: 10.1016/j.toxrep.2019.11.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 10/17/2019] [Accepted: 11/01/2019] [Indexed: 01/25/2023] Open
Abstract
Monocrotophos (MCP) is an organophosphate mainly used as insecticides in agriculture, and veterinary practice to control pests. Exposure to MCP is known to induce significant systemic toxicity in animals and humans. Short term exposure to a high dose of MCP has been reported to cause systemic toxicity, however limited information is available regarding low dose long term exposure in rats. We studied the effects of low dose long term exposure to MCP on oxidative/nitrosative stress, cholinesterase activity and neuronal loss in rat. Male rats were exposed to MCP (0.1 μg or 1 μg/ml) via drinking water for 8 weeks. The pro-oxidant markers such as reactive oxygen species (ROS), lipid peroxidation (MDA), nitrite level and antioxidant markers such as reduced glutathione (GSH), superoxide dismutase (SOD), catalase (CAT) and inhibition of cholinesterase activities were measured to evaluate the effects of MCP on brain along with plasma cholinesterase activity. Neuronal loss was analyzed in cortical region using H&E stained slices. The results suggested that exposure to MC even at the low dose, increased reactive oxygen species, thiobarbituric acid reactive substance levels and decreased glutathione, superoxide dismutase, catalase and cholinesterase activities in brain. No significant effect however, was observed on nitrite levels. Histological analysis revealed that low dose MCP exposure lead to structural changes in the cortical neurons in rats. It can be concluded from the study that low dose long term exposure (lower than No Observed Effect Level) of MCP may lead to the generation of oxidative stress by elevation of pro-oxidants markers and depletion of antioxidant enzymes markers along with inhibition of cholinesterase activity. These changes might thus be considered as the possible mechanism of cortical neuronal loss in these animals.
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Key Words
- ATCI, acetylthiocholineiodide
- BSA, bovine serum albumin
- ChE, cholinesterase
- Cholinesterase inhibition
- DCFDA, 2, 7-dichlrofluorescein diacetate
- DMS, dimethyl sulfoxide
- DTNB, 5, 5-dithiobis (2-nitro-benzoic acid)
- H2O2, hydrogen peroxide
- MCP, monocrotophos
- MDA, malondialdehyde
- Monocrotophos
- NADH, nicotinamide adenine dinucleotide reduced
- NBT, nitrobluetetrazolium
- NO, nitric oxide
- NOEL, no observed effect level
- Na2CO3, sodium carbonate
- NaOH, sodium hydroxide
- Neuronal loss
- Nitrosative stress
- OP, organophosphate
- Oxidative stress
- PMSP, henazinemethosulphate
- ROS, reactive oxygen species
- Rat
- SDS, sodium dodecyl sulphate
- SOD, superoxide dismutase
- TBA, thiobarbituricacid
- TBARS, thiobarbituric acid reactive substances
- rGSH, reduced glutathion
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Hulcová D, Maříková J, Korábečný J, Hošťálková A, Jun D, Kuneš J, Chlebek J, Opletal L, De Simone A, Nováková L, Andrisano V, Růžička A, Cahlíková L. Amaryllidaceae alkaloids from Narcissus pseudonarcissus L. cv. Dutch Master as potential drugs in treatment of Alzheimer's disease. Phytochemistry 2019; 165:112055. [PMID: 31261031 DOI: 10.1016/j.phytochem.2019.112055] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/27/2019] [Accepted: 06/23/2019] [Indexed: 05/27/2023]
Abstract
Twenty-one known Amaryllidaceae alkaloids of various structural types and one undescribed alkaloid, named narcimatuline, have been isolated from fresh bulbs of Narcissus pseudonarcissus L. cv. Dutch Master. The chemical structures were elucidated by combination of MS, HRMS, 1D and 2D NMR spectroscopic techniques, and by comparison with literature data. Narcimatuline amalgamates two basic scaffolds of Amaryllidaceae alkaloids in its core, namely galanthamine and galanthindole. All isolated compounds were evaluated for their in vitro acetylcholinesterase (AChE), butyrylcholinesterase (BuChE), prolyl oligopeptidase (POP), and glycogen synthase kinase-3β (GSK-3β) inhibitory activities. The most interesting biological profile was demonstrated by newly isolated alkaloid narcimatuline.
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Affiliation(s)
- Daniela Hulcová
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic; Department of Pharmacognosy, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Jana Maříková
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Jan Korábečný
- Department of Toxicoloxy and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Třebešská 1575, 500 05, Hradec Králové, Czech Republic; Department Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05, Hradec Králové, Czech Republic
| | - Anna Hošťálková
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Daniel Jun
- Department of Toxicoloxy and Military Pharmacy, Faculty of Military Health Sciences, University of Defence, Třebešská 1575, 500 05, Hradec Králové, Czech Republic
| | - Jiří Kuneš
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Jakub Chlebek
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Lubomír Opletal
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Angela De Simone
- Department for Life Quality Studies, University of Bologna, Corso D'Augusto 237, 47921, Rimini, Italy
| | - Lucie Nováková
- Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Vincenza Andrisano
- Department for Life Quality Studies, University of Bologna, Corso D'Augusto 237, 47921, Rimini, Italy
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10, Pardubice, Czech Republic
| | - Lucie Cahlíková
- ADINACO Research Group, Department of Pharmaceutical Botany, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05, Hradec Králové, Czech Republic.
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25
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Bose B, Tripathy D, Chatterjee A, Tandon P, Kumaria S. Secondary metabolite profiling, cytotoxicity, anti-inflammatory potential and in vitro inhibitory activities of Nardostachys jatamansi on key enzymes linked to hyperglycemia, hypertension and cognitive disorders. Phytomedicine 2019; 55:58-69. [PMID: 30668444 DOI: 10.1016/j.phymed.2018.08.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 08/06/2018] [Indexed: 05/28/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Nardostachys jatamansi (D. Don) DC., 'Spikenard' or 'Jatamansi', a highly valued, aromatic herb from alpine Himalayas has a long history of use as ethnomedicine and dietary supplements in Ayurveda, Unani and Chinese system of medicine since Vedic ages (1000-800 BC). In Ayurveda and traditional system of medicine, the species is used as stimulant, sedative, brain tonic or mind rejuvenator, antidiabetic, cardio tonic, and in the treatment of various neurological disorders such as insomnia, epilepsy, hysteria, anxiety and depression. It is considered as Sattvic herb in Ayurveda and is now commercially marketed either as single or poly-herbal formulations by many companies in national and international markets. AIM OF THE STUDY The species has become threatened in its natural habitats due to over exploitation and illegal trade of its rhizomes for drug preparation in herbal and pharmaceutical industries. Considering the increasing demand and tremendous medicinal importance of this threatened plant species, a detailed study was undertaken to evaluate its antioxidant potential, secondary metabolite profiling, cytotoxicity, anti-inflammatory potential and in vitro enzyme inhibitory activities on key enzymes linked to hyperglycemia, hypertension and cognitive disorders in different plant parts of wild and in vitro-raised plants with respect to different solvent systems for its sustainable utilization. MATERIALS AND METHODS Anti-cholinesterase activity of leaves and rhizome of wild and cultured plant extracts was investigated against both acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) enzymes. In vitro anti-hyperglycemic (α-amylase and PTP1B), anti-hypertensive (angiotensin-converting enzyme), anti-tyrosinase and anti-inflammatory potential (5-lipoxygenase and hyaluronidase) of different plant parts of wild and in vitro-raised plants with respect to different solvent systems were also evaluated. In vitro cytotoxic effect of rootstock extracts of wild and in vitro-derived plants were against cancer (HCT-116, MCF-7 and OE33) and two normal (HEK and MEF) cell lines. Secondary metabolite profiling of rhizome segments of wild and in vitro-derived plants was carried out by quantitative gas chromatography-mass spectrometry (GC-MS). RESULTS In vitro-raised plantlets showed comparative higher yield of various secondary metabolites with a significantly high antioxidant activity as compared to the wild plants. Methanolic rootstock extracts of both wild and in vitro-derived plants of N. jatamansi exhibited significant AChE (IC50 36.46 ± 2.1 and 31.18 ± 2.6 µg/ml, respectively) and BuChE (IC50 64.6 ± 3.5 and 60.12 ± 3.6 µg/ml, respectively) inhibitory potential as compared to standard inhibitor galanthamine (IC50 0.94 ± 0.03 and 4.45 ± 0.5 µg/ml). Methanolic rootstock extract of in vitro-derived plants showed significant α-amylase (IC50 90.69 ± 2.1 µg/ml), PTP1B (IC50 24.56 ± 0.8 µg/ml), angiotensin-converting enzyme (IC50 42.5 ± 3.6 µg/ml) and tyrosinase (IC50 168.12 ± 3.6 µg/ml) inhibitory potential as compared to standard acarbose (IC50 52.36 ± 3.1 µg/ml), ursolic acid (IC50 5.24 ± 0.8 µg/ml), captopril (IC50 32.36 ± 2.5 µg/ml) and kojic acid (IC50 = 54.44 ± 2.3 µg/ml). Both the methanolic rootstock and leaf extracts of tissue culture-derived plants exhibited promising anti-5-LOX and anti-hyaluronidase activities against the known inhibitor of 5-LOX and hyaluronidase. Furthermore, methanolic rootstock extracts of both wild and in vitro-derived plants exhibited promising cytotoxic effects to HCT-116, MCF-7 and OE33 cell lines as compared to the normal HEK and MEF after 12 h of treatment. Secondary metabolite profiling of wild and in vitro-derived plants by quantitative GC-MS analysis revealed the presence of different classes of terpenoids and phenolic acids might be responsible for its effective biological activities. CONCLUSION In vitro-derived plants revealed a substantial anti-cholinesterases, anti-hyperglycemic anti-inflammatory, anti-hypertensive and anti-tyrosinase potential with higher yield of various bioactive metabolites and significantly higher antioxidant activity which substantially explain medicinal importance of N. jatamansi in traditional medicine, used for centuries in different Ayurvedic formulations. The present findings suggest that cultured plants could be a promising alternative for the production of bioactive metabolites with comparative biological activities to the wild plants.
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Affiliation(s)
- Biswajit Bose
- Plant Biotechnology Laboratory, Department of Botany, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Debabrata Tripathy
- Molecular Genetics Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Anupam Chatterjee
- Molecular Genetics Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Pramod Tandon
- Plant Biotechnology Laboratory, Department of Botany, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Suman Kumaria
- Plant Biotechnology Laboratory, Department of Botany, North-Eastern Hill University, Shillong 793022, Meghalaya, India.
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Derabli C, Boualia I, Abdelwahab AB, Boulcina R, Bensouici C, Kirsch G, Debache A. A cascade synthesis, in vitro cholinesterases inhibitory activity and docking studies of novel Tacrine-pyranopyrazole derivatives. Bioorg Med Chem Lett 2018; 28:2481-2484. [PMID: 29887354 DOI: 10.1016/j.bmcl.2018.05.063] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 05/30/2018] [Accepted: 05/31/2018] [Indexed: 10/14/2022]
Abstract
In this work, we describe the preparation of some new Tacrine analogues modified with a pyranopyrazole moiety. A one-pot multicomponent reaction of 3-methyl-1H-pyrazol-5(4H)-one, aryl(or hetero)aldehydes, malononitrile and cyclohexanone involving a Friedländer condensation led to the title compounds. The synthesized heterocyclic analogues of this molecule were evaluated in vitro for their AChE and BChE inhibitory activities in search for potent cholinesterase enzyme inhibitors. Most of the synthesized compounds displayed remarkable AChE inhibitory activities with IC50 values ranging from 0.044 to 5.80 µM, wherein compounds 5e and 5j were found to be most active inhibitors against AChE with IC50 values of 0.058 and 0.044 µM respectively. Molecular modeling simulation on AChE and BChE receptors, showed good correlation between IC50 values and binding interaction template of the most active inhibitors docked into the active site of their relevant enzymes.
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Affiliation(s)
- Chamseddine Derabli
- Laboratory of Synthesis of Molecules with Biological Interest, Frères Mentouri-Constantine University, 25000 Constantine, Algeria
| | - Imen Boualia
- Laboratory of Synthesis of Molecules with Biological Interest, Frères Mentouri-Constantine University, 25000 Constantine, Algeria
| | - Ahmed B Abdelwahab
- SRSMC, Lorraine University, 1 Boulevard Arago, 57070, France; Chemistry of Natural Compounds Department, National Research Centrer, El-Behoos St. 33, Dokki, Cairo 12622, Egypt
| | - Raouf Boulcina
- Laboratory of Synthesis of Molecules with Biological Interest, Frères Mentouri-Constantine University, 25000 Constantine, Algeria; Faculty of Technology, Batna 2 University, 05000 Batna, Algeria.
| | | | - Gilbert Kirsch
- SRSMC, Lorraine University, 1 Boulevard Arago, 57070, France
| | - Abdelmadjid Debache
- Laboratory of Synthesis of Molecules with Biological Interest, Frères Mentouri-Constantine University, 25000 Constantine, Algeria
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Khan NA, Khan I, Abid SMA, Zaib S, Ibrar A, Andleeb H, Hameed S, Iqbal J. Quinolinic Carboxylic Acid Derivatives as Potential Multi-target Compounds for Neurodegeneration: Monoamine Oxidase and Cholinesterase Inhibition. Med Chem 2018; 14:74-85. [PMID: 28545383 DOI: 10.2174/1573406413666170525125231] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 05/14/2017] [Accepted: 05/16/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Parkinson's disease (PD), a debilitating and progressive disorder, is among the most challenging and devastating neurodegenerative diseases predominantly affecting the people over 60 years of age. OBJECTIVES To confront PD, an advanced and operational strategy is to design single chemical functionality able to control more than one target instantaneously. METHODS In this endeavor, for the exploration of new and efficient inhibitors of Parkinson's disease, we synthesized a series of quinoline carboxylic acids (3a-j) and evaluated their in vitro monoamine oxidase and cholinesterase inhibitory activities. The molecular docking and in silico studies of the most potent inhibitors were performed to identify the probable binding modes in the active site of the monoamine oxidase enzymes. Moreover, molecular properties were calculated to evaluate the druglikeness of the compounds. RESULTS The biological evaluation results revealed that the tested compounds were highly potent against monoamine oxidase (A & B), 3c targeted both the isoforms of MAO with IC50 values of 0.51 ± 0.12 and 0.51 ± 0.03 µM, respectively. The tested compounds also demonstrated high and completely selective inhibitory action against acetylcholinesterase (AChE) with IC50 values ranging from 4.36 to 89.24 µM. Among the examined derivatives, 3i was recognized as the most potent inhibitor of AChE with an IC50 value of 4.36 ± 0.12 ±µM. CONCLUSION The compounds appear to be promising inhibitors and could be used for the future development of drugs targeting neurodegenerative disorders.
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Affiliation(s)
- Nehal A Khan
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad-22060. Pakistan
| | - Imtiaz Khan
- Department of Chemistry, Quaid-i-Azam University, Islamabad-45320. Pakistan
| | - Syed M A Abid
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad-22060. Pakistan
| | - Sumera Zaib
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad-22060. Pakistan
| | - Aliya Ibrar
- Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad-22060. Pakistan
| | - Hina Andleeb
- Department of Chemistry, Quaid-i-Azam University, Islamabad-45320. Pakistan
| | - Shahid Hameed
- Department of Chemistry, Quaid-i-Azam University, Islamabad-45320. Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad-22060. Pakistan
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28
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Prasad S, Kumar B, Kumar S, Chand K, Kamble SS, Gautam HK, Sharma SK. Acetamide Derivatives of Chromen-2-ones as Potent Cholinesterase Inhibitors. Arch Pharm (Weinheim) 2017; 350. [PMID: 28699213 DOI: 10.1002/ardp.201700076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 06/06/2017] [Accepted: 06/13/2017] [Indexed: 12/13/2022]
Abstract
Alzheimer's disease (AD), a neurodegenerative disorder, is a serious medical issue worldwide with drastic social consequences. Inhibition of cholinesterase is one of the rational and effective approaches to retard the symptoms of AD and, hence, consistent efforts are being made to develop efficient anti-cholinesterase agents. In pursuit of this, a series of 19 acetamide derivatives of chromen-2-ones were synthesized and evaluated for their acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory potential. All the synthesized compounds exhibited significant anti-AChE and anti-BChE activity, with IC50 values in the range of 0.24-10.19 μM and 0.64-30.08 μM, respectively, using donepezil hydrochloride as the standard. Out of 19 compounds screened, 3 compounds, viz. 22, 40, and 43, caused 50% inhibition of AChE at 0.24, 0.25, and 0.25 μM, respectively. A kinetic study revealed them to be mixed-type inhibitors, binding with both the CAS and PAS sites of AChE. The above-selected compounds were found to be effective inhibitors of AChE-induced and self-mediated Aβ1-42 aggregation. ADMET predictions demonstrated that these compounds may possess suitable blood-brain barrier (BBB) permeability. Hemolytic assay results revealed that these compounds did not lyse human RBCs up to a thousand times of their IC50 value. MTT assays performed for the shortlisted compounds showed them to be negligibly toxic after 24 h of treatment with the SH-SY5Y neuroblastoma cells. These results provide insights for further optimization of the scaffolds for designing the next generation of compounds as lead cholinesterase inhibitors.
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Affiliation(s)
- Suchita Prasad
- Department of Chemistry, University of Delhi, Delhi, India
| | - Bipul Kumar
- CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, Delhi, India
| | - Shiv Kumar
- Department of Chemistry, University of Delhi, Delhi, India
| | - Karam Chand
- Department of Chemistry, University of Delhi, Delhi, India.,Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Shashank S Kamble
- CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, Delhi, India
| | - Hemant K Gautam
- CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, Delhi, India
| | - Sunil K Sharma
- Department of Chemistry, University of Delhi, Delhi, India
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Orhan IE, Senol FS, Shekfeh S, Skalicka-Wozniak K, Banoglu E. Pteryxin - A promising butyrylcholinesterase-inhibiting coumarin derivative from Mutellina purpurea. Food Chem Toxicol 2017; 109:970-974. [PMID: 28286309 DOI: 10.1016/j.fct.2017.03.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/05/2017] [Accepted: 03/06/2017] [Indexed: 11/24/2022]
Abstract
Pteryxin is a dihydropyranocoumarin derivative found in Apiaceae family. In this study, pteryxin, which was previously isolated from the fruits of Mutellina purpurea, was investigated for its inhibitory potential against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), which are the key enzymes in the pathology of Alzheimer's disease (AD). The compound was tested in vitro using ELISA microplate reader at 100 μg/ml and found to cause 9.30 ± 1.86% and 91.62 ± 1.53% inhibition against AChE and BChE, respectively. According to our results, pteryxin (IC50 = 12.96 ± 0.70 μg/ml) was found to be a more active inhibitor of BChE than galanthamine (IC50 = 22.16 ± 0.91 μg/ml; 81.93± 2.52% of inhibition at 100 μg/ml). Further study on pteryxin using molecular docking experiments revealed different possible binding modes with both polar and hydrophobic interactions inside the binding pocket of BChE. Top docking solution points out to the formation of two hydrogen bonds with the catalytic residues S198 and H438 of BChE as well as a strong π - π stacking with W231. Therefore, pteryxin as a natural coumarin seems to be a strong BChE inhibitor, which could be considered as a lead compound to develop novel BChE inhibitors for AD treatment.
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Affiliation(s)
- Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey.
| | - Fatma Sezer Senol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey
| | - Suhaib Shekfeh
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey
| | - Krystyna Skalicka-Wozniak
- Department of Pharmacognosy with Medicinal Plant Unit, Faculty of Pharmacy, Medical University of Lublin, 20-093 Lublin, Poland
| | - Erden Banoglu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey.
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Shifrin H, Mouhadeb O, Gluck N, Varol C, Weinstock M. Cholinergic Anti-Inflammatory Pathway Does Not Contribute to Prevention of Ulcerative Colitis by Novel Indoline Carbamates. J Neuroimmune Pharmacol 2017; 12:484-491. [PMID: 28271317 DOI: 10.1007/s11481-017-9735-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Accepted: 02/28/2017] [Indexed: 12/27/2022]
Abstract
Indoline carbamates, AN680 and AN917 decrease cytokines, TNF-α and IL-6 in peritoneal macrophages activated by lipopolysaccharide (LPS) and in mouse tissues after LPS injection. They prevent nuclear translocation of nuclear factor κB (NF-κB) and activator protein 1. Only AN917 inhibits cholinesterase (ChE) at relevant concentrations. ChE inhibitors decrease NF-κB by activating α7 nicotinic acetylcholine receptors (α7nAChR). The current study compared the effect of rivastigmine, a ChE inhibitor, AN680 and AN917 on ulcerative colitis induced in mice by ingestion of dextran sodium sulfate (4.5%) solution. Rivastigmine (1 mg/kg), AN680 (2.5-10 mg/kg) and AN917 (2-5 mg/kg) were injected subcutaneously once daily for 8 days. Disease severity was assessed by disease activity index (DAI), colonoscopy, colon length and body weight loss, colonic levels of TNF-α, IL-6, IL-1β and myeloid peroxidase (MPO) activity. AN680 (5 mg/kg) reduced DAI, colon shrinkage, weight loss, histopathological signs of colon damage, MPO activity, TNF-α, IL-1β and IL-6 levels without inhibiting ChE. AN917 (5 mg/kg) and rivastigmine (1 mg/kg) inhibited ChE in plasma and colon by 65%, reduced DAI, MPO activity and IL-6, but not TNF-α or IL-1β. AN917 did not prevent weight loss or colon shrinkage. Mecamylamine abolished the reduction of DAI, MPO activity and IL-6 by AN917 and rivastigmine, indicating they were mediated by α7nAChR. CONCLUSIONS AN680 is very effective in preventing DSS-induced UC in mice and may therefore have potential therapeutic application in humans. Addition of ChE inhibition and indirect activation of α7nAChR lessens the efficacy of AN917 in this model.
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Affiliation(s)
- Helena Shifrin
- Institute of Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Odelia Mouhadeb
- Research Centre for Digestive Tract and Liver Diseases, Tel Aviv-Sourasky Medical Centre and Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - Nathan Gluck
- Research Centre for Digestive Tract and Liver Diseases, Tel Aviv-Sourasky Medical Centre and Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - Chen Varol
- Research Centre for Digestive Tract and Liver Diseases, Tel Aviv-Sourasky Medical Centre and Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - Marta Weinstock
- Institute of Drug Research, The Hebrew University of Jerusalem, Jerusalem, Israel.
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Xia CL, Wang N, Guo QL, Liu ZQ, Wu JQ, Huang SL, Ou TM, Tan JH, Wang HG, Li D, Huang ZS. Design, synthesis and evaluation of 2-arylethenyl-N-methylquinolinium derivatives as effective multifunctional agents for Alzheimer's disease treatment. Eur J Med Chem 2017; 130:139-153. [PMID: 28242549 DOI: 10.1016/j.ejmech.2017.02.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 02/14/2017] [Accepted: 02/16/2017] [Indexed: 10/20/2022]
Abstract
A series of 2-arylethenyl-N-methylquinolinium derivatives were designed and synthesized based on our previous research of 2-arylethenylquinoline analogues as multifunctional agents for the treatment of Alzheimer's disease (AD) (Eur. J. Med. Chem. 2015, 89, 349-361). The results of in vitro biological activity evaluation, including β-amyloid (Aβ) aggregation inhibition, cholinesterase inhibition, and antioxidant activity, showed that introduction of N-methyl in quinoline ring significantly improved the anti-AD potential of compounds. The optimal compound, compound a12, dramatically attenuated the cell death of glutamate-induced HT22 cells by preventing the generation of ROS and increasing the level of GSH. Most importantly, intragastric administration of a12•HAc was well tolerated at doses up to 2000 mg/kg and could traverse blood-brain barrier.
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Affiliation(s)
- Chun-Li Xia
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Ning Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Qian-Liang Guo
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Zhen-Quan Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Jia-Qiang Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Shi-Liang Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Tian-Miao Ou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Jia-Heng Tan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Hong-Gen Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Ding Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Zhi-Shu Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China.
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32
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Horton W, Sood A, Peerannawar S, Kugyela N, Kulkarni A, Tulsan R, Tran CD, Soule J, LeVine H, Török B, Török M. Synthesis and application of β-carbolines as novel multi-functional anti-Alzheimer's disease agents. Bioorg Med Chem Lett 2017; 27:232-236. [PMID: 27923619 PMCID: PMC5282889 DOI: 10.1016/j.bmcl.2016.11.067] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 12/22/2022]
Abstract
The design, synthesis and assessment of β-carboline core-based compounds as potential multifunctional agents against several processes that are believed to play a significant role in Alzheimer's disease (AD) pathology, are described. The activity of the compounds was determined in Aβ self-assembly (fibril and oligomer formation) and cholinesterase (AChE, BuChE) activity inhibition, and their antioxidant properties were also assessed. To obtain insight into the mode of action of the compounds, HR-MS studies were carried out on the inhibitor-Aβ complex formation and molecular docking was performed on inhibitor-BuChE interactions. While several compounds exhibited strong activities in individual assays, compound 14 emerged as a promising multi-target lead for the further structure-activity relationship studies.
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Affiliation(s)
- William Horton
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Abha Sood
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | | | - Nandor Kugyela
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Aditya Kulkarni
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Rekha Tulsan
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Chris D Tran
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Jessica Soule
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Harry LeVine
- Department of Molecular and Cellular Biochemistry, Chandler School of Medicine, and Center on Aging, University of Kentucky, Lexington, KY 40536, USA
| | - Béla Török
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Marianna Török
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA.
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33
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Carev I, Ruščić M, Skočibušić M, Maravić A, Siljak-Yakovlev S, Politeo O. Phytochemical and Cytogenetic Characterization of Centaurea solstitialis L. (Asteraceae) from Croatia. Chem Biodivers 2017; 14. [PMID: 27552682 DOI: 10.1002/cbdv.201600213] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 08/22/2016] [Indexed: 11/07/2022]
Abstract
The cytogenetic characterization of Centaurea solstitialis L. (Asteraceae) showed a chromosome number of 2n = 16. Karyotype is composed by four pairs of metacentric, two pairs of submetacentric and two pairs of subtelocentric chromosomes. Physical mapping of two rDNA probes revealed two loci of 35S and one locus of 5S rRNA genes. Chromomycin fluorochrome banding revealed that all rDNA loci were GC rich. The genome size (2C-value) of 1.95 pg classes this species in the group of very small genomes. Chemical composition of C. solstitialis volatile oil (VO) from Croatia, studied with gas chromatography-mass spectrometry showed dominant components as it follows: hexadecanoic acid, α-linolenic acid, germacrene D and heptacosane. Antioxidant capacity, measured by ferric reducing power assay and 2,2-diphenyl-1-picrylhydrazyl methods, as well as inhibition of acetyl- and butyrylcholinesterase of VO was lower comparing to a standard solutions. Volatile oil tested with disc diffusion method showed good inhibitory potential against Pseudomonas aeruginosa, Escherichia coli and all tested fungi: Candida albicans, Penicillium funiculosum and Aspergillus fumigatus. The microdilution method showed best activity against Chronobacter sakazakii and A. fumigatus.
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Affiliation(s)
- Ivana Carev
- Department of Biochemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21 000, Split, Croatia
| | - Mirko Ruščić
- Faculty of Natural Sciences, University of Split, Ruđera Boškovića 33, 21 000, Split, Croatia
| | - Mirjana Skočibušić
- Faculty of Natural Sciences, University of Split, Ruđera Boškovića 33, 21 000, Split, Croatia
| | - Ana Maravić
- Faculty of Natural Sciences, University of Split, Ruđera Boškovića 33, 21 000, Split, Croatia
| | - Sonja Siljak-Yakovlev
- Ecologie Systématique Evolution, University of Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, FR-91400, Orsay Cedex
| | - Olivera Politeo
- Department of Biochemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21 000, Split, Croatia
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Senol FS, Ślusarczyk S, Matkowski A, Pérez-Garrido A, Girón-Rodríguez F, Cerón-Carrasco JP, den-Haan H, Peña-García J, Pérez-Sánchez H, Domaradzki K, Orhan IE. Selective in vitro and in silico butyrylcholinesterase inhibitory activity of diterpenes and rosmarinic acid isolated from Perovskia atriplicifolia Benth. and Salvia glutinosa L. Phytochemistry 2017; 133:33-44. [PMID: 27817931 DOI: 10.1016/j.phytochem.2016.10.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 10/25/2016] [Accepted: 10/27/2016] [Indexed: 06/06/2023]
Abstract
Cholinesterase inhibition is one of the most treatment strategies against Alzheimer's disease (AD) where metal accumulation is also strongly associated with pathology of the disease. In the current study, we assessed inhibitory effect against acetyl- (AChE) and butyrylcholinesterase (BChE) and metal-chelating capacity of twelve diterpenes: arucadiol, miltirone, tanshinone IIa, 1-oxomiltirone, cryptotanshinone, 1,2-didehydromiltirone, 1,2-didehydrotanshinone IIa, 1β-hydroxycryptotanshinone, 15,16-dihydrotanshinone, tanshinone I, isotanshinone II, 1(S)-hydroxytanshinone IIa, and rosmarinic acid, isolated from Perovskia atriplicifolia and Salvia glutinosa. The compounds were tested at 10 μg/mL using ELISA microtiter assays against AChE and BChE. QSAR and molecular docking studies have been also performed on the active compounds. All of the compounds showed higher [e.g., IC50 = 1.12 ± 0.07 μg/mL for 1,2-didehydromiltirone, IC50 = 1.15 ± 0.07 μg/mL for cryptotanshinone, IC50 = 1.20 ± 0.03 μg/mL for arucadiol, etc.)] or closer [1,2-didehydrotanshinone IIa (IC50 = 5.98 ± 0.49 μg/mL) and 1(S)-hydroxytanshinone IIa (IC50 = 5.71 ± 0.27 μg/mL)] inhibition against BChE as compared to that of galanthamine (IC50 = 12.56 ± 0.37 μg/mL), whereas only 15,16-dihydrotanshinone moderately inhibited AChE (65.17 ± 1.39%). 1,2-Didehydrotanshinone IIa (48.94 ± 0.26%) and 1(S)-hydroxytanshinone IIa (47.18 ± 5.10%) possessed the highest metal-chelation capacity. The present study affords an evidence for the fact that selective BChE inhibitors should be further investigated as promising candidate molecules for AD therapy.
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Affiliation(s)
- F Sezer Senol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey
| | - Sylwester Ślusarczyk
- Department of Pharmaceutical Biology and Botany, Wroclaw Medical University, Wroclaw, Poland; Bioinformatics and High Performance Computing Research Group, Universidad Católica San Antonio de Murcia (UCAM), Spain
| | - Adam Matkowski
- Department of Pharmaceutical Biology and Botany, Wroclaw Medical University, Wroclaw, Poland
| | - Alfonso Pérez-Garrido
- Bioinformatics and High Performance Computing Research Group, Universidad Católica San Antonio de Murcia (UCAM), Spain
| | - Francisco Girón-Rodríguez
- Department of Food and Nutrition Technology, Universidad Católica San Antonio de Murcia (UCAM), Spain
| | - José P Cerón-Carrasco
- Bioinformatics and High Performance Computing Research Group, Universidad Católica San Antonio de Murcia (UCAM), Spain
| | - Helena den-Haan
- Bioinformatics and High Performance Computing Research Group, Universidad Católica San Antonio de Murcia (UCAM), Spain
| | - Jorge Peña-García
- Bioinformatics and High Performance Computing Research Group, Universidad Católica San Antonio de Murcia (UCAM), Spain
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group, Universidad Católica San Antonio de Murcia (UCAM), Spain.
| | - Krzysztof Domaradzki
- Department of Weed Science and Soil Tillage Systems, IUNG-Institute of Soil Science and Plant Cultivation, Wroclaw, Poland
| | - Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey.
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35
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Hadidi L, Babou L, Zaidi F, Valentão P, Andrade PB, Grosso C. Quercus ilex L.: How season, Plant Organ and Extraction Procedure Can Influence Chemistry and Bioactivities. Chem Biodivers 2016; 14. [PMID: 27584870 DOI: 10.1002/cbdv.201600187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/31/2016] [Indexed: 12/11/2022]
Abstract
Quercus species have a plethora of applications, either in wine and wood industries, in human and animal nutrition or in human health. In order to improve the knowledge on this genus, the aim of the present study was to correlate, for the first time, the phenolic composition of different Quercus ilex L. plant tissues (leaves in two maturation stages, acorns, teguments and cotyledons) and different extraction procedures with scavenging and anticholinesterase activities. The hydromethanolic and aqueous extracts obtained showed strong radical scavenging activity against DPPH, superoxide anion radical and nitric oxide radical, leaves exhibiting higher total phenolic content and revealing the best antioxidant properties, followed by tegument and acorns. Concerning the phenolic profile, fifteen compounds were identified and quantified by HPLC-DAD, ranging from 1568.43 to 45,803.16 mg/kg dried extract. The results indicate that Q. ilex can be a source of strong antioxidant phenolic compounds with possible interest for food and pharmaceutical industries.
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Affiliation(s)
- Lila Hadidi
- Department of Physico-Chemical Biology, Faculty of Nature and Life Sciences, University of Bejaia, Bejaia, 06000, Algeria
| | - Louiza Babou
- Department of Food Science, Faculty of Nature and Life Sciences, University of Bejaia, Bejaia, 06000, Algeria
| | - Farid Zaidi
- Department of Food Science, Faculty of Nature and Life Sciences, University of Bejaia, Bejaia, 06000, Algeria
| | - Patrícia Valentão
- REQUIMTE/LAQV, Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, no. 228, PT-4050-313, Porto, Portugal
| | - Paula B Andrade
- REQUIMTE/LAQV, Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, no. 228, PT-4050-313, Porto, Portugal
| | - Clara Grosso
- REQUIMTE/LAQV, Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, no. 228, PT-4050-313, Porto, Portugal
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Wang L, Wang Y, Tian Y, Shang J, Sun X, Chen H, Wang H, Tan W. Design, synthesis, biological evaluation, and molecular modeling studies of chalcone-rivastigmine hybrids as cholinesterase inhibitors. Bioorg Med Chem 2016; 25:360-371. [PMID: 27856236 DOI: 10.1016/j.bmc.2016.11.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 10/31/2016] [Accepted: 11/01/2016] [Indexed: 12/30/2022]
Abstract
A series of novel chalcone-rivastigmine hybrids were designed, synthesized, and tested in vitro for their ability to inhibit human acetylcholinesterase and butyrylcholinesterase. Most of the target compounds showed hBChE selective activity in the micro- and submicromolar ranges. The most potent compound 3 exhibited comparable IC50 to the commercially available drug (rivastigmine). To better understand their structure activity relationships (SAR) and mechanisms of enzyme-inhibitor interactions, kinetic and molecular modeling studies including molecular docking and molecular dynamics (MD) simulations were carried out. Furthermore, compound 3 blocks the formation of reactive oxygen species (ROS) in SH-SY5Y cells and shows the required druggability and low cytotoxicity, suggesting this hybrid is a promising multifunctional drug candidate for Alzheimer's disease (AD) treatment.
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Affiliation(s)
- Ling Wang
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, Pre-Incubator for Innovative Drugs & Medicine, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China.
| | - Yu Wang
- Department of Pharmacology, Institute of Medical Sciences, Shanghai Jiao Tong University, School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
| | - Yiguang Tian
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, Pre-Incubator for Innovative Drugs & Medicine, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Jinling Shang
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, Pre-Incubator for Innovative Drugs & Medicine, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Xiaoou Sun
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, Pre-Incubator for Innovative Drugs & Medicine, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Hongzhuan Chen
- Department of Pharmacology, Institute of Medical Sciences, Shanghai Jiao Tong University, School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
| | - Hao Wang
- Department of Pharmacology, Institute of Medical Sciences, Shanghai Jiao Tong University, School of Medicine, 280 South Chongqing Road, Shanghai 200025, China.
| | - Wen Tan
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, Pre-Incubator for Innovative Drugs & Medicine, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China.
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37
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Generalić Mekinić I, Blažević I, Mudnić I, Burčul F, Grga M, Skroza D, Jerčić I, Ljubenkov I, Boban M, Miloš M, Katalinić V. Sea fennel ( Crithmum maritimum L.): phytochemical profile, antioxidative, cholinesterase inhibitory and vasodilatory activity. J Food Sci Technol 2016; 53:3104-3112. [PMID: 27765981 DOI: 10.1007/s13197-016-2283-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/12/2016] [Accepted: 06/29/2016] [Indexed: 10/21/2022]
Abstract
Sea fennel, a rediscovered star of the coastal cuisine, has been investigated for its phytochemical profile and biological potential. Sea fennel flowers, stems and leaves were analyzed for essential oils (EOs) isolated by hydrodistillation, as well as non-volatiles obtained by ethanolic extraction. Limonene were found to be a dominant compound in EOs and ethanolic extracts; ranging from 57.5-74.2 % and 0.7-8.1 mg/g dry plant material, respectively. In addition total phenolic content was determined for ethanolic extracts. All samples and their main phytochemicals were tested for various methods. EO and extract obtained from flowers were tested for vasodilatory activity on rat aortic rings. Antioxidant activity of EOs was extremely low in comparison to extracts, on the contrary to cholinesterase inhibition where EOs showed better activity than extracts. Flower extract and chlorogenic acid showed stronger vasodilators in comparison to EO and limonene. The obtained results point out the potential impact of the dominant compounds from EO and extract on the biological properties of the sea fennel.
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Affiliation(s)
- Ivana Generalić Mekinić
- Department of Food Technology and Biotechnology, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Ivica Blažević
- Department of Organic Chemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Ivana Mudnić
- Department of Pharmacology, School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia
| | - Franko Burčul
- Department of Biochemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Mia Grga
- Department of Food Technology and Biotechnology, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Danijela Skroza
- Department of Food Technology and Biotechnology, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Iva Jerčić
- Department of Pharmacology, School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia
| | - Ivica Ljubenkov
- Department of Chemistry, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
| | - Mladen Boban
- Department of Pharmacology, School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia
| | - Mladen Miloš
- Department of Biochemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Višnja Katalinić
- Department of Food Technology and Biotechnology, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
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Liu W, Lang M, Youdim MBH, Amit T, Sun Y, Zhang Z, Wang Y, Weinreb O. Design, synthesis and evaluation of novel dual monoamine-cholinesterase inhibitors as potential treatment for Alzheimer's disease. Neuropharmacology 2016; 109:376-385. [PMID: 27318273 DOI: 10.1016/j.neuropharm.2016.06.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 11/18/2022]
Abstract
Current novel therapeutic approach suggests that multifunctional compounds with diverse biological properties and a single bioavailability and pharmacokinetic metabolism, will produce higher significant advantages in treatment of neurodegenerative diseases, such as Alzheimer's disease (AD). Based on this rational, a new class of cholinesterase (ChE)-monoamine oxidase (MAO) inhibitors were designed and synthesized by amalgamating the propargyl moiety of the irreversible selective MAO-B inhibitor, neuroprotective/neurorestorative anti-Parkinsonian drug, rasagiline, into the "N-methyl" position of the ChE inhibitor, anti-AD drug rivastigmine. Initially, we examined the MAO and ChE inhibitory effect of these novel compounds, MT series in vitro and in vivo. Among MT series, MT-031 exhibited higher potency as a dual MAO-A and ChE inhibitor compared to other compounds in acute-treated mice. Additionally, MT-031 was found to increase the striatal levels of dopamine (DA), serotonin (5-HT) and norepinephrine (NE), and prevent the metabolism of DA and 5-HT. Finally, we have demonstrated that MT-031 exerted neuroprotective effect against H2O2-induced neurotoxicity and reactive oxygen species generation in human neuroblastoma SH-SY5Y cells. These findings provide evidence that MT-031 is a potent brain permeable novel multifunctional, neuroprotective and MAO-A/ChE inhibitor, preserves in one molecule entity some of the beneficial properties of its parent drugs, rasagiline and rivastigmine, and thus may be indicated as novel therapeutic approach for AD.
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Affiliation(s)
- Wei Liu
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ming Lang
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Moussa B H Youdim
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Tamar Amit
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Yewei Sun
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Zaijun Zhang
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Yuqiang Wang
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Orly Weinreb
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
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Thangaraj G, Manakov V, Cucu A, Fournier C, Layer PG. Inflammatory effects of TNFα are counteracted by X-ray irradiation and AChE inhibition in mouse micromass cultures. Chem Biol Interact 2016; 259:313-318. [PMID: 27019294 DOI: 10.1016/j.cbi.2016.03.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/12/2016] [Accepted: 03/21/2016] [Indexed: 01/17/2023]
Abstract
As a means to analyze anti-inflammatory effects by radiation and/or by cholinergic mechanisms, we found that cultured primary human osteoblasts express most cholinergic components. After X-ray irradiation, their level of acetylcholinesterase (AChE) was strongly elevated. As a 3D model, we cultured mesenchymal stem cells isolated from E11 mouse embryos as micromass nodules, and differentiated them into chondro- and osteoblasts. They were stimulated by 5 or 10 ng/ml of the inflammatory cytokine TNF-α to mimic an inflammatory condition in vitro, before exposure to 2 Gy X-rays. Effects on chondro- and osteoblasts of TNF-α, of X-rays, or both were analysed by Alcian Blue, or Alizarin Red staining, respectively. Acetylcholinesterase (AChE) activity was visualized histochemically. The results showed that treatment with TNF-α affected cartilage and bone formation in vitro, while X-rays reversed the effects of TNF-α. After irradiation, both AChE and alkaline phosphatase (ALP) activities, a marker for bone mineralization, were raised, suggesting that X-rays stimulated cholinergic mechanisms during calcification. Notably, the TNFα-effects on cultures were also counterbalanced after AChE activity was blocked by BW284c51. These findings suggest a complex crosstalk between radiation, cholinergic and inflammatory mechanisms, which could have wide significances, e.g. for understanding rheumatoid arthritis.
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Affiliation(s)
- Gopenath Thangaraj
- Technische Universität Darmstadt, Developmental Biology & Neurogenetics, Schnittspahnstrasse 13, D-64287 Darmstadt, Germany
| | - Vadim Manakov
- Technische Universität Darmstadt, Developmental Biology & Neurogenetics, Schnittspahnstrasse 13, D-64287 Darmstadt, Germany
| | - Aljona Cucu
- GSI Helmholtzzentrum für Schwerionenforschung, Department of Biophysics, Planckstrasse 1, D-64291 Darmstadt-Wixhausen, Germany
| | - Claudia Fournier
- GSI Helmholtzzentrum für Schwerionenforschung, Department of Biophysics, Planckstrasse 1, D-64291 Darmstadt-Wixhausen, Germany
| | - Paul G Layer
- Technische Universität Darmstadt, Developmental Biology & Neurogenetics, Schnittspahnstrasse 13, D-64287 Darmstadt, Germany.
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Lee YS, Lewis JA, Ippolito DL, Hussainzada N, Lein PJ, Jackson DA, Stallings JD. Repeated exposure to neurotoxic levels of chlorpyrifos alters hippocampal expression of neurotrophins and neuropeptides. Toxicology 2016; 340:53-62. [PMID: 26775027 DOI: 10.1016/j.tox.2016.01.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 12/23/2015] [Accepted: 01/10/2016] [Indexed: 12/19/2022]
Abstract
Chlorpyrifos (CPF), an organophosphorus pesticide (OP), is one of the most widely used pesticides in the world. Subchronic exposures to CPF that do not cause cholinergic crisis are associated with problems in cognitive function (i.e., learning and memory deficits), but the biological mechanism(s) underlying this association remain speculative. To identify potential mechanisms of subchronic CPF neurotoxicity, adult male Long Evans (LE) rats were administered CPF at 3 or 10mg/kg/d (s.c.) for 21 days. We quantified mRNA and non-coding RNA (ncRNA) expression profiles by RNA-seq, microarray analysis and small ncRNA sequencing technology in the CA1 region of the hippocampus. Hippocampal slice immunohistochemistry was used to determine CPF-induced changes in protein expression and localization patterns. Neither dose of CPF caused overt clinical signs of cholinergic toxicity, although after 21 days of exposure, cholinesterase activity was decreased to 58% or 13% of control levels in the hippocampus of rats in the 3 or 10mg/kg/d groups, respectively. Differential gene expression in the CA1 region of the hippocampus was observed only in the 10mg/kg/d dose group relative to controls. Of the 1382 differentially expressed genes identified by RNA-seq and microarray analysis, 67 were common to both approaches. Differential expression of six of these genes (Bdnf, Cort, Crhbp, Nptx2, Npy and Pnoc) was verified in an independent CPF exposure study; immunohistochemistry demonstrated that CRHBP and NPY were elevated in the CA1 region of the hippocampus at 10mg/kg/d CPF. Gene ontology enrichment analysis suggested association of these genes with receptor-mediated cell survival signaling pathways. miR132/212 was also elevated in the CA1 hippocampal region, which may play a role in the disruption of neurotrophin-mediated cognitive processes after CPF administration. These findings identify potential mediators of CPF-induced neurobehavioral deficits following subchronic exposure to CPF at a level that inhibits hippocampal cholinesterase to less than 20% of control. An equally significant finding is that subchronic exposure to CPF at a level that produces more moderate inhibition of hippocampal cholinesterase (approximately 50% of control) does not produce a discernable change in gene expression.
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Abstract
OBJECTIVE To explore cholinesterase inhibitory and antioxidant effect of six coniferous trees (Abies bornmulleriana, Picea pungens, Juniperus communis, Cedrus libani, Taxus baccata, and Cupressus sempervirens var. horizantalis). METHODS Acetone (Ace), ethyl acetate (EtOAc), and ethanol (EtOH) extracts prepared from the needles and shoots of the six coniferous trees were screened for their acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity at 100 μg/mL. Antioxidant activity of the extracts was tested using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and N,N-dimethyl-p-phenylendiamine (DMPD) radical scavenging, metal-chelation capacity, ferric-(FRAP) and phosphomolibdenum-reducing antioxidant power (PRAP) assays. All of the assays were performed in ELISA microplate reader. Total phenol and flavonoid amounts in the extracts were determined spectrophotometrically. RESULTS Among thirty-six extracts in total, the shoot-Ace extract of Cupressus sempervirens var. horizantalis exerted the highest inhibition against AChE [(54.84±2.51)%], while the needle-Ace extract of Cedrus libani was the most effective in inhibiting BChE [(67.54±0.30)%]. The highest DPPH radical scavenging effect, FRAP and PRAP was observed in the shoot-Ace and EtOAc extracts from Taxus baccata, whereas all the extracts showed a variable degree of scavenging effect against DPMD radical. The shoot-EtOAc extract of Cedrus libani had the highest metal-chelation capacity [(58.04±0.70)%]. The shoot extracts of Taxus baccata were determined to have the richest total phenol content, which may contribute to its marked antioxidant activity. CONCLUSIONS The conifer species screened in this study may contain cholinesterase-inhibiting and antioxidant properties, which might be useful against Alzheimer's disease.
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Affiliation(s)
- Fatma Sezer Senol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey
| | - Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey.
| | - Osman Ustun
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey
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Stankov-Jovanović VP, Ilić MD, Mitić VD, Mihajilov-Krstev TM, Simonović SR, Nikolić Mandić SD, Tabet JC, Cole RB. Secondary metabolites of Seseli rigidum: Chemical composition plus antioxidant, antimicrobial and cholinesterase inhibition activity. J Pharm Biomed Anal 2015; 111:78-90. [PMID: 25863020 DOI: 10.1016/j.jpba.2015.03.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 12/01/2022]
Abstract
Extracts of different polarity obtained from various plant parts (root, leaf, flower and fruit) of Seseli rigidum were studied by different antioxidant assays: DPPH and ABTS radical scavenging activity, by total reducing power method as well as via total content of flavonoids and polyphenols. Essential oils of all plant parts showed weak antioxidant characteristics. The inhibitory concentration range of the tested extracts, against bacteria Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, and fungi Candida albicans and Aspergillus niger was 0.01-1.50 mg/mL and of a microbicidal 0.02-3.00 mg/mL. In the interaction with cholinesterase, all essential oils proved effective as inhibitors. The highest percentage of inhibition versus human and horse cholinesterase was shown by root essential oil (38.20% and 48.30%, respectively) among oils, and root hexane extract (40.56% and 50.65% respectively). Essential oils and volatile components of all plant parts were identified by GC, GC-MS and headspace/GC-MS. Statistical analysis of the ensemble of results showed that the root essential oil composition differed significantly from essential oils of other parts of the plant. Taking into account all of the studied activities, the root hexane extract showed the best overall properties. By means of high performance liquid chromatography coupled to high resolution mass spectrometry, the 30 most abundant constituents were identified in extracts of different polarity. The presence of identified constituents was linked to observed specific biological activities, thus designating compounds potentially responsible for each exhibited activity.
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Affiliation(s)
- V P Stankov-Jovanović
- University of Niš, Faculty of Science and Mathematics, Department of Chemistry, Višegradska 33, 18000 Niš, Serbia.
| | - M D Ilić
- University of Niš, Faculty of Science and Mathematics, Department of Chemistry, Višegradska 33, 18000 Niš, Serbia
| | - V D Mitić
- University of Niš, Faculty of Science and Mathematics, Department of Chemistry, Višegradska 33, 18000 Niš, Serbia
| | - T M Mihajilov-Krstev
- University of Niš, Faculty of Science and Mathematics, Department of Biology and Ecology, Višegradska 33, 18000 Niš, Serbia
| | - S R Simonović
- University of Priština (Kosovska Mitrovica), Faculty of Science and Mathematics, Department of Chemistry, Ive Lole Ribara 29, 38220 Kosovska Mitrovica, Serbia
| | - S D Nikolić Mandić
- University of Belgrade, Faculty of Chemistry, Studentski trg 12-16, Belgrade, Serbia
| | - J C Tabet
- Institut Parisien de Chimie Moléculaire, UMR 8232, Université Pierre and Marie Curie (Paris 6), 4 Place Jussieu, 75252 Paris, France
| | - R B Cole
- Institut Parisien de Chimie Moléculaire, UMR 8232, Université Pierre and Marie Curie (Paris 6), 4 Place Jussieu, 75252 Paris, France
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Liendro N, Ferrari A, Mardirosian M, Lascano CI, Venturino A. Toxicity of the insecticide chlorpyrifos to the South American toad Rhinella arenarum at larval developmental stage. Environ Toxicol Pharmacol 2015; 39:525-535. [PMID: 25681703 DOI: 10.1016/j.etap.2014.12.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 12/30/2014] [Accepted: 12/31/2014] [Indexed: 06/04/2023]
Abstract
Chlorpyrifos (CPF) is an insecticide widely used for pest control in the fruit-productive region of North Patagonia, Argentina, where it is found in superficial waters. The aim of this study was to establish the toxic effects of CPF in Rhinella arenarum toad larvae as a potentially exposed species. We determined the 96 h-LC50 (1.46 ± 0.27 mg/L), the LOEC (0.81 mg/L, LC10) and NOEC (0.43 mg/L, LC1) for CPF lethality as endpoint. We also analyzed biochemical biomarkers in larvae exposed to sublethal CPF concentrations. The IC50 for cholinesterase was 0.113 ± 0.026 mg/L, one order of magnitude lower than the LC50. Carboxylesterase activity was inhibited, buffering OP toxicity on cholinesterase. Reduced glutathione increased after 24h as an antioxidant response, and decreased at 96 h together with catalase activity, due to oxidative stress. These biochemical effects suggest that environmentally relevant CPF concentrations pose a threat to R. arenarum larvae progression.
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Affiliation(s)
- Natacha Liendro
- Laboratorio de Investigaciones Bioquímicas y Químicas del Ambiente (LIBIQUIMA), Facultad de Ingeniería, Universidad Nacional del Comahue - CONICET, Buenos Aires 1400, 8300 Neuquén, Argentina(2); Facultad de Ciencias Agrarias, Universidad Nacional del Comahue, Ruta 151 Km 12.5, 8303 Cinco Saltos, Río Negro, Argentina(3)
| | - Ana Ferrari
- Laboratorio de Investigaciones Bioquímicas y Químicas del Ambiente (LIBIQUIMA), Facultad de Ingeniería, Universidad Nacional del Comahue - CONICET, Buenos Aires 1400, 8300 Neuquén, Argentina(2); Facultad de Ciencias Médicas, Universidad Nacional del Comahue, Toschi y Arrayanes, 8324 Cipolletti, Río Negro, Argentina
| | - Mariana Mardirosian
- Laboratorio de Investigaciones Bioquímicas y Químicas del Ambiente (LIBIQUIMA), Facultad de Ingeniería, Universidad Nacional del Comahue - CONICET, Buenos Aires 1400, 8300 Neuquén, Argentina(2); Facultad de Ciencias Agrarias, Universidad Nacional del Comahue, Ruta 151 Km 12.5, 8303 Cinco Saltos, Río Negro, Argentina(3)
| | - Cecilia I Lascano
- Laboratorio de Investigaciones Bioquímicas y Químicas del Ambiente (LIBIQUIMA), Facultad de Ingeniería, Universidad Nacional del Comahue - CONICET, Buenos Aires 1400, 8300 Neuquén, Argentina(2); Facultad de Ciencias Agrarias, Universidad Nacional del Comahue, Ruta 151 Km 12.5, 8303 Cinco Saltos, Río Negro, Argentina(3)
| | - Andrés Venturino
- Laboratorio de Investigaciones Bioquímicas y Químicas del Ambiente (LIBIQUIMA), Facultad de Ingeniería, Universidad Nacional del Comahue - CONICET, Buenos Aires 1400, 8300 Neuquén, Argentina(2); Facultad de Ciencias Agrarias, Universidad Nacional del Comahue, Ruta 151 Km 12.5, 8303 Cinco Saltos, Río Negro, Argentina(3).
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Moser VC, Phillips PM, McDaniel KL. Assessment of biochemical and behavioral effects of carbaryl and methomyl in Brown-Norway rats from preweaning to senescence. Toxicology 2015; 331:1-13. [PMID: 25707986 DOI: 10.1016/j.tox.2015.02.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/13/2015] [Accepted: 02/18/2015] [Indexed: 10/24/2022]
Abstract
Factors impacting life stage-specific sensitivity to chemicals include toxicokinetic and toxicodynamic changes. To evaluate age-related differences in the biochemical and behavioral impacts of two typical N-methyl carbamate pesticides, we systematically compared their dose-response and time-course in preweanling (postnatal day, PND, 18) and adult male Brown Norway rats (n=9-10/dose or time) ranging from adolescence to senescence (1, 4, 12, 24 mo). Carbaryl was administered orally at 3, 7.5, 15, or 22.5mg/kg and data were collected at 40 min after dosing, or else given at 3 or 15 mg/kg and data collected at 30, 60, 120, and 240 min. Methomyl was studied only in adult and senescent rat (4, 12, 24 mo) in terms of dose-response (0.25. 0.6, 1.25, 2.5mg/kg) and time-course (1.25mg/kg at 30, 60, 120, 240 min). Motor activity as well as brain and erythrocyte (RBC) cholinesterase (ChE) activity were measured in the same animals. In the carbaryl dose-response, PND18 rats were the most sensitive to the brain ChE-inhibiting effects of carbaryl, but 12- and 24-mo rats showed more motor activity depression even at similar levels of brain ChE inhibition. We have previously reported that brain ChE inhibition, but not motor activity effects, closely tracked carbaryl tissue levels. There were no age-related differences in methomyl-induced ChE inhibition across doses, but greater motor activity depression was again observed in the 12- and 24-mo rats. Carbaryl time-course data showed that motor activity depression reached a maximum later, and recovered slower, in the 12- and 24-mo rats compared to the younger ages; slowest recovery and maximal effects were seen in the 24-mo rats. Acetylcholinesterase sensitivity (concentration-inhibition curves) was measured in vitro using control tissues from each age. Inhibitory concentrations of carbaryl were somewhat lower in PND18, 12-, and 24-mo tissues compared to 1- and 4-mo, but there were no differences with methomyl-treated tissues. Thus, in the dose-response and time-course, there were dissociations between brain ChE inhibition and the magnitude as well as recovery of motor activity changes. The explanation for this dissociation is unclear, and is likely due to early development followed by aging-related decline in both kinetic parameters and neurological responsiveness.
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Affiliation(s)
- Virginia C Moser
- Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC, United States.
| | - Pamela M Phillips
- Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Katherine L McDaniel
- Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC, United States
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Yoon M, Kedderis GL, Yan GZ, Clewell HJ. Use of in vitro data in developing a physiologically based pharmacokinetic model: Carbaryl as a case study. Toxicology 2014; 332:52-66. [PMID: 24863738 DOI: 10.1016/j.tox.2014.05.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 04/02/2014] [Accepted: 05/18/2014] [Indexed: 12/14/2022]
Abstract
In vitro-derived information has been increasingly used to support and improve human health risk assessment for exposure to chemicals. Physiologically based pharmacokinetic (PBPK) modeling is a key component in the movement toward in vitro-based risk assessment, providing a tool to integrate diverse experimental data and mechanistic information to relate in vitro effective concentrations to equivalent human exposures. One of the challenges, however, in the use of PBPK models for this purpose has been the need for extensive chemical-specific parameters. With the remarkable advances in in vitro methodologies in recent years, in vitro-derived parameters can now be easily incorporated into PBPK models. In this study we demonstrate an in vitro data based parameterization approach to develop a physiologically based pharmacokinetic and pharmacodynamic (PBPK/PD) model, using carbaryl as a case study. In vitro experiments were performed to provide the chemical-specific pharmacokinetic (PK) and pharmacodynamic (PD) parameters for carbaryl in the PBPK model for this compound. Metabolic clearance and cholinesterase (ChE) interaction parameters for carbaryl were measured in rat and human tissues. These in vitro PK and PD data were extrapolated to parameters in the whole body PBPK model using biologically appropriate scaling. The PBPK model was then used to predict the kinetics and ChE inhibition dynamics of carbaryl in vivo. This case study with carbaryl provides a reasonably successful example of utilizing the in vitro to in vivo extrapolation (IVIVE) approach for PBPK model development. This approach can be applied to other carbamates with an anticholinesterase mode of action as well as to environmental chemicals in general with further refinement of the current shortcomings in the approach. It will contribute to minimizing the need for in vivo human data for PBPK model parameterization and evaluation in human risk assessments.
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Affiliation(s)
- Miyoung Yoon
- Center for Human Health Assessment, The Hamner Institutes for Health Sciences, Research Triangle Park, NC, USA.
| | | | - Grace Zhixia Yan
- Center for Human Health Assessment, The Hamner Institutes for Health Sciences, Research Triangle Park, NC, USA.
| | - Harvey J Clewell
- Center for Human Health Assessment, The Hamner Institutes for Health Sciences, Research Triangle Park, NC, USA.
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Oropesa AL, Pérez-López M, Soler F. Characterization of plasma cholinesterase in rabbit and evaluation of the inhibitory potential of diazinon. Ecotoxicol Environ Saf 2014; 100:39-43. [PMID: 24433789 DOI: 10.1016/j.ecoenv.2013.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 11/28/2013] [Accepted: 12/01/2013] [Indexed: 06/03/2023]
Abstract
Several studies indicate that more than one cholinesterase form may be present in the blood of mammals. In this study the predominant plasma cholinesterase activity, the physiological cholinesterase activity as well as cholinesterase sex-dependent changes in non-exposed individuals of rabbit have been established. Plasma cholinesterase was characterized using three substrates (acetylthiocholine iodide, propionylthiocholine iodide, and S-butyrylthiocholine iodide) and three cholinesterase inhibitors (eserine sulfate, BW284C51 and iso-OMPA). The results indicated that propionylthiocholine was the preferred substrate by plasma cholinesterase followed by acetylthiocholine and butyrylthiocholine, and the predominant enzymatic activity was acetylcholinesterase. Physiological plasma cholinesterase activity was 198.9 ± 5.8 nmol/min/ml for male and 205.2 ± 5.0 nmol/min/ml for female using acetylthiocholine as substrate. Thus, sex had no significant effect on the physiological cholinesterase activity (p>0.05). In addition, the in vivo and in vitro sensitivity of plasma cholinesterase to diazinon was also investigated. In rabbits exposed to single doses of diazinon (25 or 125 mg/kg) the higher inhibitions of plasma cholinesterase were reached 9h after oral administration (53% and 87% inhibition, respectively). Cholinesterase activity significantly recovered up to values similar to pre-administration between 3 and 7d depending on the administered dose and sex of the animals. Plasma cholinesterase activity decreased to 24%, 53% and 74% of the initial activity at 9h of in vitro exposure to 1.25, 3.13 and 6.25mg/l of diazinon, respectively, and it remained steadily depressed throughout the experimental period (10d). This study has demonstrated the sensitivity of cholinesterase activity in plasma of rabbits following both in vivo and in vitro exposure to sub-lethal concentrations of diazinon.
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Affiliation(s)
- Ana Lourdes Oropesa
- Toxicology Area, Veterinary Faculty, University of Extremadura, Avda. de la Universidad, s/n, P.O. Box 643, 10003 Cáceres, Spain.
| | - Marcos Pérez-López
- Toxicology Area, Veterinary Faculty, University of Extremadura, Avda. de la Universidad, s/n, P.O. Box 643, 10003 Cáceres, Spain
| | - Francisco Soler
- Toxicology Area, Veterinary Faculty, University of Extremadura, Avda. de la Universidad, s/n, P.O. Box 643, 10003 Cáceres, Spain
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Oropesa AL, Gravato C, Sánchez S, Soler F. Characterization of plasma cholinesterase from the White stork (Ciconia ciconia) and its in vitro inhibition by anticholinesterase pesticides. Ecotoxicol Environ Saf 2013; 97:131-138. [PMID: 23962622 DOI: 10.1016/j.ecoenv.2013.07.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/12/2013] [Accepted: 07/15/2013] [Indexed: 06/02/2023]
Abstract
Blood plasma cholinesterase (ChE) activity is a sensitive biomarker of exposure to organophosphorus (OP) and carbamate (CB) insecticides in vertebrates. Several studies indicate that more than one ChE form may be present in blood of birds. In this study the predominant ChE activity (acetylcholinesterase - AChE- or butyrylcholinesterase - BChE-), the range of ChE activity as well as ChE age-dependent changes in non-exposed individuals of White stork (Ciconia ciconia) have been established. The in vitro sensitivity of ChE to OP and CB insecticides such as paraoxon-methyl, carbofuran and carbaryl was also investigated. Plasma ChE was characterised using three substrates (acetylthiocholine iodide, propionylthiocholine iodide, and S-butyrylthiocholine iodide) and three ChE inhibitors (eserine sulphate, BW284C51 and iso-OMPA). The results indicated that propionylthiocholine was the preferred substrate by plasma cholinesterase followed by acetylcholine and butyrylcholine and the predominant enzymatic activity in plasma of White storks was BChE. Normal plasma BChE activity in White stork was 0.32±0.01μmol/min/ml for adults and 0.28±0.03μmol/min/ml for juveniles. So, the age had no significant effect on the range of BChE activity. The study on the in vitro inhibitory potential of tested anticholinesterase pesticides on plasma ChE activity revealed that paraoxon-methyl is the most potent inhibitor followed by carbofuran and finally by carbaryl. The percentage of in vitro plasma ChE inhibition was observed to be similar between adults and juveniles.
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Affiliation(s)
- Ana-Lourdes Oropesa
- Toxicology Area, School of Veterinary, University of Extremadura, Avda. de la Universidad, s/n, 10003 Cáceres, Spain.
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