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Abdallah AE. Review on anti-alzheimer drug development: approaches, challenges and perspectives. RSC Adv 2024; 14:11057-11088. [PMID: 38586442 PMCID: PMC10995770 DOI: 10.1039/d3ra08333k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 03/22/2024] [Indexed: 04/09/2024] Open
Abstract
Alzheimer is an irreversible progressive neurodegenerative disease that causes failure of cerebral neurons and disability of the affected person to practice normal daily life activities. There is no concrete evidence to identify the exact reason behind the disease, so several relevant hypotheses emerged, highlighting many possible therapeutic targets, such as acetylcholinesterase, cholinergic receptors, N-methyl d-aspartate receptors, phosphodiesterase, amyloid β protein, protein phosphatase 2A, glycogen synthase kinase-3 beta, β-secretase, γ-secretase, α-secretase, serotonergic receptors, glutaminyl cyclase, tumor necrosis factor-α, γ-aminobutyric acid receptors, and mitochondria. All of these targets have been involved in the design of new potential drugs. An extensive number of these drugs have been studied in clinical trials. However, only galantamine, donepezil, and rivastigmine (ChEIs), memantine (NMDA antagonist), and aducanumab and lecanemab (selective anti-Aβ monoclonal antibodies) have been approved for AD treatment. Many drugs failed in the clinical trials to such an extent that questions have been posed about the significance of some of the aforementioned targets. On the contrary, the data of other drugs were promising and shed light on the significance of their targets for the development of new potent anti-alzheimer drugs.
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Affiliation(s)
- Abdallah E Abdallah
- Pharmaceutical Medicinal Chemistry & Drug Design Department, Faculty of Pharmacy (Boys), Al-Azhar University 11884 Cairo Egypt
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2
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Yakan H, Muğlu H, Türkeş C, Demir Y, Erdoğan M, Çavuş MS, Beydemir Ş. A novel series of thiosemicarbazone hybrid scaffolds: Design, Synthesis, DFT studies, metabolic enzyme inhibition properties, and molecular docking calculations. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Evaluation of neuroprotective effects of Canna indica L against aluminium chloride induced memory impairment in rats. ADVANCES IN TRADITIONAL MEDICINE 2022. [PMCID: PMC8853014 DOI: 10.1007/s13596-021-00627-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Memory disorders are the progressive neurological disorder, mainly causing dementia, memory loss and cognitive dysfunctions. The current study is aimed to experimentally validate the crude extract of Canna indica aerial parts (CIA) and root (CIR) against aluminium chloride induced altered memory in rats. Initially, methanolic extract of CIA, hydroalcoholic extract of CIR, and their combination of CIA + CIR were screened for Invitro antioxidant activity via 2,2-diphenyl-1-picrylhydrazyl (DPPH) and nitric oxide (NO) assays, acetylcholinesterase (AChE) inhibitory assay and were also screened for their memory enhancing activity by in-vivo models such as elevated plus maze (EPM), morris water maze (MWM), cooks pole climb (CPC), Actophotometer, novel object recognition (NOR), and T-maze. Aluminium chloride (AlCl3) (17 mg/kg/day p.o.) for 21 days, was used as an Alzheimer’s disease inducing agent and Donepezil (AChE inhibitor) as a standard treatment agent. The AChE, butyrylcholinesterase (BChE) activity and malondialdehyde (MDA) level were significantly increased, and glutathione (GSH), total protein (TP), catalase (CAT), and Dopamine were decreased only in AlCl3 treated rats and treatment with CIA 200 mg/kg and CIA + CIR 200 mg/kg significantly reversed these mechanisms.Histopathology of cortex and hippocampus was examined at 40× magnification, indicating maintain of integrity and architecture of CA1 and CA3 neuronal cells compared to control and standard groups. The in vivo studies of interospective and exteroceptive behavior models (EPM), MWM, CPC, Actophotometer, NOR, T-maze revealed that AlCl3 administration enhanced transfer latency (TL), escape latency time (ELT) and decreases locomotion, discriminatory index, and percentage alternation respectively. However, treatment with CIA and CIA + CIR 200 mg/kg highly significantly reversed the pathological changes of disease, extracts of Canna indica of both root and aerial parts phyto constituents are rich in flavonoids, phlobatannins, anthocyanin pigments, saponins, alkaloids, steroids, terpenoids etc. Which will decipher the acetylcholinestrase inhibitory, antioxidant and anti-inflammatory activity, will ameliorate the pathological state of Alzheimer disease.
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Gadhave K, Kumar D, Uversky VN, Giri R. A multitude of signaling pathways associated with Alzheimer's disease and their roles in AD pathogenesis and therapy. Med Res Rev 2021; 41:2689-2745. [PMID: 32783388 PMCID: PMC7876169 DOI: 10.1002/med.21719] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/13/2020] [Accepted: 07/29/2020] [Indexed: 02/06/2023]
Abstract
The exact molecular mechanisms associated with Alzheimer's disease (AD) pathology continue to represent a mystery. In the past decades, comprehensive data were generated on the involvement of different signaling pathways in the AD pathogenesis. However, the utilization of signaling pathways as potential targets for the development of drugs against AD is rather limited due to the immense complexity of the brain and intricate molecular links between these pathways. Therefore, finding a correlation and cross-talk between these signaling pathways and establishing different therapeutic targets within and between those pathways are needed for better understanding of the biological events responsible for the AD-related neurodegeneration. For example, autophagy is a conservative cellular process that shows link with many other AD-related pathways and is crucial for maintenance of the correct cellular balance by degrading AD-associated pathogenic proteins. Considering the central role of autophagy in AD and its interplay with many other pathways, the finest therapeutic strategy to fight against AD is the use of autophagy as a target. As an essential step in this direction, this comprehensive review represents recent findings on the individual AD-related signaling pathways, describes key features of these pathways and their cross-talk with autophagy, represents current drug development, and introduces some of the multitarget beneficial approaches and strategies for the therapeutic intervention of AD.
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Affiliation(s)
- Kundlik Gadhave
- School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh, 175005, India
| | - Deepak Kumar
- School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh, 175005, India
| | - Vladimir N. Uversky
- Department of Molecular Medicine and Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- Laboratory of New Methods in Biology, Institute for Biological Instrumentation, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Rajanish Giri
- School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh, 175005, India
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El-Ganainy SO, Gowayed MA, Agami M, Mohamed P, Belal M, Farid RM, Hanafy AS. Galantamine nanoparticles outperform oral galantamine in an Alzheimer's rat model: pharmacokinetics and pharmacodynamics. NANOMEDICINE (LONDON, ENGLAND) 2021; 16:1281-1296. [PMID: 34013783 DOI: 10.2217/nnm-2021-0051] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: Galantamine is an acetylcholinesterase inhibitor frequently used in Alzheimer's disease management. Its cholinergic adverse effects and rapid elimination limit its therapeutic outcomes. We investigated the pharmacodynamics and pharmacokinetics of 2-week intranasal galantamine-bound chitosan nanoparticles (G-NP) treatment in scopolamine-induced Alzheimer's disease rat model. Materials & methods: Behavioral, neurobiochemical and histopathological changes were assessed and compared with oral and nasal solutions. Brain uptake and pharmacokinetics were determined using a novel validated LC/MS assay. Results: G-NP enhanced spatial memory, exploring behavior and cholinergic transmission in rats. Beta-amyloid deposition and Notch signaling were suppressed and the histopathological degeneration was restored. G-NP potentiated galantamine brain delivery and delayed its elimination. Conclusion: G-NP hold promising therapeutic potentials and brain targeting, outperforming conventional galantamine therapy.
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Affiliation(s)
- Samar O El-Ganainy
- Department of Pharmacology & Therapeutics, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, 21500, Egypt
| | - Mennatallah A Gowayed
- Department of Pharmacology & Therapeutics, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, 21500, Egypt
| | - Mahmoud Agami
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, 21500, Egypt
| | - Passant Mohamed
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, 21500, Egypt
| | - Marwa Belal
- Department of Pharmaceutics, Faculty of Pharmacy, Damanhour University, Beheira, 22511, Egypt
| | - Ragwa M Farid
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, 21500, Egypt
| | - Amira S Hanafy
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, 21500, Egypt
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Pitchai A, Rajaretinam RK, Mani R, Nagarajan N. Molecular interaction of human acetylcholinesterase with trans-tephrostachin and derivatives for Alzheimer's disease. Heliyon 2020; 6:e04930. [PMID: 32995619 PMCID: PMC7501440 DOI: 10.1016/j.heliyon.2020.e04930] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/29/2020] [Accepted: 09/09/2020] [Indexed: 11/19/2022] Open
Abstract
Alzheimer's disease (AD), a neurodegenerative disorder affects more than 35 million people globally. Acetylcholinesterase suppression is the common approach to enhance the well-being of AD patients by increasing the duration of acetylcholine in the cholinergic synapses. Generally, herbal secondary metabolites are reported to be a major resource for acetylcholinesterase inhibitors (AChEIs). Trans-tephrostachin was reported from Tephrosia purpurea for AChE inhibition. Here, we report on the design, synthesis, and assessment of human acetylcholinesterase inhibitory activity from trans-tephrostachin derivatives or analogs as anti-AD agents. The five newly synthesized compounds 4a. 4b, 4c, 4d and 4e displayed potent inhibitory activities with IC50 values of 35.0, 35.6, 10.6, 10.3, and 28.1 μM respectively. AChE enzyme kinetic study was performed for the five derived compounds using the Ellman's method. The Lineweaver-Burk and the secondary plots revealed the mixed inhibition for 4a, 4c and 4d whereas 4b and 4e demonstrated competitive inhibition. Molecular docking and molecular dynamics simulations showed the derivatives or analogs of trans-tephrostachin attained a high binding affinity and efficacy than the standard drug. In conclusion, trans-tephrostachin and its derivative compounds could become effective agents for further drug development to treat AD.
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Affiliation(s)
- Arjun Pitchai
- Neuroscience Lab, Centre for Molecular and Nanomedical Sciences, Centre for Nanoscience and Nanotechnology (CNSNT), School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai, 600119, Tamil Nadu, India
| | - Rajesh Kannan Rajaretinam
- Neuroscience Lab, Centre for Molecular and Nanomedical Sciences, Centre for Nanoscience and Nanotechnology (CNSNT), School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai, 600119, Tamil Nadu, India
| | - Rajasekar Mani
- Neuroscience Lab, Centre for Molecular and Nanomedical Sciences, Centre for Nanoscience and Nanotechnology (CNSNT), School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai, 600119, Tamil Nadu, India
| | - Nagasundaram Nagarajan
- School of Humanities, Nanyang Technological University, 14 Nanyang Dr, Singapore, 637332, Singapore
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Dembitsky VM, Dzhemileva L, Gloriozova T, D'yakonov V. Natural and synthetic drugs used for the treatment of the dementia. Biochem Biophys Res Commun 2020; 524:772-783. [PMID: 32037088 DOI: 10.1016/j.bbrc.2020.01.123] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 01/22/2020] [Indexed: 01/07/2023]
Abstract
This review is devoted to comparative pharmacological analysis of synthetic drugs such as memantine and its isomers, as well as tacrine, velnacrine, rivastigmine, and donepezil, with natural alkaloids, terpenoids, and triterpenoid peroxides, which are used to treat dementia, Alzheimer's and Parkinson's diseases, myasthenia gravis and other neurodegenerative diseases. Recently discovered by French scientists from Marseille triterpenoid hydroperoxides demonstrate high activity as potential therapeutic agents for the treatment of dementia. The information presented in this review is of great interest to pharmacologists, medical chemists, physiologists, neurologists and doctors, as well as for the pharmaceutical industry.
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Affiliation(s)
- Valery M Dembitsky
- Centre for Applied Research, Innovation and Entrepreneurship, Lethbridge College, 3000 College Drive South, Lethbridge, AB T1K 1L6, Canada.
| | - Lilya Dzhemileva
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Ufa, 450075, Russia.
| | - Tatyana Gloriozova
- Institute of Biomedical Chemistry, Russian Academy of Sciences, Moscow, 119121, Russia.
| | - Vladimir D'yakonov
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Ufa, 450075, Russia.
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Işık M, Demir Y, Durgun M, Türkeş C, Necip A, Beydemir Ş. Molecular docking and investigation of 4-(benzylideneamino)- and 4-(benzylamino)-benzenesulfonamide derivatives as potent AChE inhibitors. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00988-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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Umar T, Shalini S, Raza MK, Gusain S, Kumar J, Seth P, Tiwari M, Hoda N. A multifunctional therapeutic approach: Synthesis, biological evaluation, crystal structure and molecular docking of diversified 1H-pyrazolo[3,4-b]pyridine derivatives against Alzheimer's disease. Eur J Med Chem 2019; 175:2-19. [DOI: 10.1016/j.ejmech.2019.04.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/03/2019] [Accepted: 04/13/2019] [Indexed: 11/26/2022]
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10
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Wan Y, Guan S, Qian M, Huang H, Han F, Wang S, Zhang H. Structural basis of fullerene derivatives as novel potent inhibitors of protein acetylcholinesterase without catalytic active site interaction: insight into the inhibitory mechanism through molecular modeling studies. J Biomol Struct Dyn 2019; 38:410-425. [DOI: 10.1080/07391102.2019.1576543] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yongfeng Wan
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, People’s Republic of China
| | - Shanshan Guan
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, People’s Republic of China
- College of Biology and Food Engineering, Jilin Engineering Normal University, Changchun, Jilin, China
| | - Mengdan Qian
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China
| | - Houhou Huang
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, People’s Republic of China
| | - Fei Han
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, People’s Republic of China
| | - Song Wang
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, People’s Republic of China
| | - Hao Zhang
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, People’s Republic of China
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11
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Volobuff CRF, Junior PCO, Dos Santos SM, Pereira ZV, Ferreira DC, Cardoso CAL, Ruiz ALTG, Foglio MA, de Carvalho JE, Formagio ASN. Antitumoral and Anticholinesterasic Activities of the Seven Species from Rubiaceae. Curr Pharm Biotechnol 2019; 20:302-308. [PMID: 30747062 DOI: 10.2174/1389201020666190211154550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/30/2019] [Accepted: 02/05/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND The genus Psychotria and Palicourea are reported as a source of alkaloids and iridoids, which exhibit biological activities. This study aimed to evaluate antiproliferative and anticholinesterase activities and quantification of the alkaloids of seven species among the genus found in Mato Grosso do Sul region in Brazil. METHODS Concentrations of alkaloids were measured spectrophotometrically. The extracts were submitted to antiproliferative activity against ten cell lines. The anticholinesterase activity of the extracts was developed using brain structures of male Wistar rats: cerebral cortex, hippocampus, hypothalamus and striatum by the Ellman method. RESULTS Alkaloids from Psychotria and Palicourea species were quantified which showed values of 47.6 to 21.9 µg/g. Regarding the antiproliferative potential, Palicourea crocea demonstrated selectivity against the 786-0 cell line (GI50: 22.87 µg/mL). Psychotria leiocarpa inhibited cell growth against OVCAR-3 (GI50: 3.28 µg/mL), K-562 (GI50: 5.26 µg/mL), HaCaT (GI50: 27.20 µg/mL), PC-3 (GI50: 34.92 µg/mL), MCF-7 (GI50: 35.80 µg/mL) and P. capillacea showed activity against OVCAR-3 (GI50: 2.33 µg/ml) and U251 (GI50: 16.66 µg/ml). The effect of acetylcholinesterase inhibition was more effective in the hippocampus, demonstrating inhibition for Paliourea crocea, Psychotria deflexa, P. brachybotrya and P. leiocarpa of 70%, 57%, 50% and 40%, respectively, followed by P. poeppigiana and P. capillacea, inhibiting 21%, compared to the control. CONCLUSION Herein, the present work showed for the first time, anticholinesterasic and antiproliferative activities of extracts of Palicourea and Psychotria seem to be mainly associated with the levels of alkaloids in the leaves of these species.
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Affiliation(s)
- Carla R F Volobuff
- Faculty of Health Sciences, Federal University of Grande Dourados, Dourados-MS, Brazil
| | - Pedro C O Junior
- Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados-MS, Brazil
| | - Sidney M Dos Santos
- Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados-MS, Brazil
| | - Zefa V Pereira
- Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados-MS, Brazil
| | - Diego C Ferreira
- Department of Chemistry, State University of Mato Grosso do Sul, Dourados-MS, Brazil
| | - Claudia A L Cardoso
- Department of Chemistry, State University of Mato Grosso do Sul, Dourados-MS, Brazil
| | - Ana L T G Ruiz
- Faculty of Pharmaceutical Science, University of Campinas Unicamp, SP, Sao Paulo, Brazil
| | - Mary A Foglio
- Faculty of Pharmaceutical Science, University of Campinas Unicamp, SP, Sao Paulo, Brazil
| | - João E de Carvalho
- Faculty of Pharmaceutical Science, University of Campinas Unicamp, SP, Sao Paulo, Brazil
| | - Anelise S N Formagio
- Faculty of Health Sciences, Federal University of Grande Dourados, Dourados-MS, Brazil.,Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados-MS, Brazil
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Kim HH, Jung NH. The effect of exercise combined with a cognitive-enhancement group training program on cognition and depression in the community-dwelling elderly. J Phys Ther Sci 2018; 30:335-338. [PMID: 29545708 PMCID: PMC5851377 DOI: 10.1589/jpts.30.335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/29/2017] [Indexed: 12/03/2022] Open
Abstract
[Purpose] In this study, we investigated the effects of combining exercise with a
cognitive-enhancement group program on cognition and depression in a group of
community-dwelling elderly people. [Subjects and Methods] The study’s subjects consisted
of 30 community-dwelling elderly people of both genders, whose average age was 78 years.
They participated in a program of physical exercise combined with a cognitive-enhancement
group training program. This consisted of sessions lasting 60 minutes that took place once
a week over 3 months. To assess the participants’ levels of cognition and depression, we
conducted batteries of tests using, respectively, the Korean versions of the Consortium to
Establish a Registry for Alzheimer’s Disease assessment packet (CERAD-K) and the Geriatric
Depression Scale-Short Form (GDS-SF). [Results] The Verbal Fluency test, Word List Memory
test, Modified Boston Naming test, Mini Mental Status Examination (Korean Version)
(MMSE-KC), Constructional Praxis task and Constructional Recall task showed significant
improvement, but improvement in the Word List Recall and Word List Recognition tests did
not achieve significant levels. Meanwhile, the symptoms of depression were shown to
decrease significantly. [Conclusion] Physical exercise combined with a
cognitive-enhancement group training program was effective in improving, some of the
components of cognition, as well as alleviating depression. This program should be used
for the prevention of dementia in community-dwelling elderly, through the intervention
should be complemented in order to improve more of the components of cognition.
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Affiliation(s)
- Hwan-Hee Kim
- Department of Occupational Therapy, Semyung University, Republic of Korea
| | - Nam-Hae Jung
- Department of Occupational Therapy, Dongseo University: 47 Jurye-ro, Sasang-gu, Busan 47011, Republic of Korea
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Nian Y, Lu NH, Liu XL, Li DS, Zhou L, Qiu MH. Antiacetylcholinesterase triterpenes from the fruits of Cimicifuga yunnanensis. RSC Adv 2018; 8:7832-7838. [PMID: 35539105 PMCID: PMC9078504 DOI: 10.1039/c8ra00291f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/10/2018] [Indexed: 11/21/2022] Open
Abstract
Two new cycloartane triterpenes, cimyunnin E (1), containing a unique oxaspiro[4.4]nonanedione moiety based on rings D and E, together with cimicifine B (2), a 25,26,27-trinortriterpene featuring a pyridine ring E, were purified from the fruits of Cimicifuga yunnanensis. Their structures were elucidated by spectroscopic methods and ECD (electronic circular dichroism calculations). Compounds 1 and 2 showed significant acetylcholinesterase (AChE) inhibition with IC50 values of 1.58 and 3.87 μM, respectively. In addition, they noticeably enhanced the neurite outgrowth of nerve growth factor (NGF) mediated PC12 cells at a concentration of 10 μM.
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Affiliation(s)
- Yin Nian
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 People's Republic of China
| | - Ni-Hong Lu
- Department of Respiratory Medicine, The Third People's Hospital of Kunming Kunming 650041 People's Republic of China
| | - Xiao-Ling Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 People's Republic of China
| | - Da-Shan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 People's Republic of China
| | - Lin Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 People's Republic of China
| | - Ming-Hua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 People's Republic of China
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Dickey AS, La Spada AR. Therapy development in Huntington disease: From current strategies to emerging opportunities. Am J Med Genet A 2017; 176:842-861. [PMID: 29218782 DOI: 10.1002/ajmg.a.38494] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 09/08/2017] [Indexed: 12/13/2022]
Abstract
Huntington disease (HD) is a progressive autosomal dominant neurodegenerative disorder in which patients typically present with uncontrolled involuntary movements and subsequent cognitive decline. In 1993, a CAG trinucleotide repeat expansion in the coding region of the huntingtin (HTT) gene was identified as the cause of this disorder. This extended CAG repeat results in production of HTT protein with an expanded polyglutamine tract, leading to pathogenic HTT protein conformers that are resistant to protein turnover, culminating in cellular toxicity and neurodegeneration. Research into the mechanistic basis of HD has highlighted a role for bioenergetics abnormalities stemming from mitochondrial dysfunction, and for synaptic defects, including impaired neurotransmission and excitotoxicity. Interference with transcription regulation may underlie the mitochondrial dysfunction. Current therapies for HD are directed at treating symptoms, as there are no disease-modifying therapies. Commonly prescribed drugs for involuntary movement control include tetrabenazine, a potent and selective inhibitor of vesicular monoamine transporter 2 that depletes synaptic monoamines, and olanzapine, an atypical neuroleptic that blocks the dopamine D2 receptor. Various drugs are used to treat non-motor features. The HD therapeutic pipeline is robust, as numerous efforts are underway to identify disease-modifying treatments, with some small compounds and biological agents moving into clinical trials. Especially encouraging are dosage reduction strategies, including antisense oligonucleotides, and molecules directed at transcription dysregulation. Given the depth and breadth of current HD drug development efforts, there is reason to believe that disease-modifying therapies for HD will emerge, and this achievement will have profound implications for the entire neurotherapeutics field.
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Affiliation(s)
- Audrey S Dickey
- Departments of Neurology, Neurobiology, and Cell Biology, Duke Center for Neurodegeneration & Neurotherapeutics, Duke University Medical Center, Durham, North Carolina
| | - Albert R La Spada
- Departments of Neurology, Neurobiology, and Cell Biology, Duke Center for Neurodegeneration & Neurotherapeutics, Duke University Medical Center, Durham, North Carolina
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In Vitro Screening of Three Indian Medicinal Plants for Their Phytochemicals, Anticholinesterase, Antiglucosidase, Antioxidant, and Neuroprotective Effects. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5140506. [PMID: 29204442 PMCID: PMC5674485 DOI: 10.1155/2017/5140506] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 07/20/2017] [Indexed: 12/14/2022]
Abstract
Cooccurrence of Diabetes Mellitus and Alzheimer's disease in elder people prompts scientists to develop multitarget agents that combat causes and symptoms of both diseases simultaneously. In line with this modern paradigm and as a follow-up to our previous studies, the present study is designed to investigate the crude methanolic extracts and subsequent CHCl3, n-BuOH, and H2O fractions of Acalypha alnifolia, Pavetta indica, and Ochna obtusata for their inhibitory activities towards specific targets involved in AD and DM, namely, acetylcholinesterase, butyrylcholinesterase, and α-glucosidase (α-Glc). The methanolic extract and its derived chloroform fractions exhibited remarkable inhibitory capacities with IC50 values being found at the μg/mL level. Further studies on most active chloroform fractions presented a prominent ability to scavenge DPPH and ABTS reactive species and highest neuroprotective effect against H2O2 induced cell injury. Phytochemical analysis showed a large amount of phenolics, flavonoids, and terpenoids in active fractions. In conclusion, A. alnifolia, P. indica, and O. obtusata could be promising sources for the treatment of AD and DM since these fractions induced significant anticholinesterase, antidiabetic, antioxidant, and neuroprotection effects attributable to phenolic, flavonoid, and terpenoid contents and encourage further studies for development of multifunctional therapeutic agent for AD and DM dual therapy.
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Liu Y, Yan B, Winkler DA, Fu J, Zhang A. Competitive Inhibition Mechanism of Acetylcholinesterase without Catalytic Active Site Interaction: Study on Functionalized C 60 Nanoparticles via in Vitro and in Silico Assays. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18626-18638. [PMID: 28492309 DOI: 10.1021/acsami.7b05459] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Acetylcholinesterase (AChE) activity regulation by chemical agents or, potentially, nanomaterials is important for both toxicology and pharmacology. Competitive inhibition via direct catalytic active sites (CAS) binding or noncompetitive inhibition through interference with substrate and product entering and exiting has been recognized previously as an AChE-inhibition mechanism for bespoke nanomaterials. The competitive inhibition by peripheral anionic site (PAS) interaction without CAS binding remains unexplored. Here, we proposed and verified the occurrence of a presumed competitive inhibition of AChE without CAS binding for hydrophobically functionalized C60 nanoparticles (NPs) by employing both experimental and computational methods. The kinetic inhibition analysis distinguished six competitive inhibitors, probably targeting the PAS, from the pristine and hydrophilically modified C60 NPs. A simple quantitative nanostructure-activity relationship (QNAR) model relating the pocket accessible length of substituent to inhibition capacity was then established to reveal how the geometry of the surface group decides the NP difference in AChE inhibition. Molecular docking identified the PAS as the potential binding site interacting with the NPs via a T-shaped plug-in mode. Specifically, the fullerene core covered the enzyme gorge as a lid through π-π stacking with Tyr72 and Trp286 in the PAS, while the hydrophobic ligands on the fullerene surface inserted into the AChE active site to provide further stability for the complexes. The modeling predicted that inhibition would be severely compromised by Tyr72 and Trp286 deletions, and the subsequent site-directed mutagenesis experiments proved this prediction. Our results demonstrate AChE competitive inhibition of NPs without CAS participation to gain further understanding of both the neurotoxicity and the curative effect of NPs.
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Affiliation(s)
- Yanyan Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences , Beijing 100190, China
| | - Bing Yan
- School of Chemistry and Chemical Engineering, Shandong University , Jinan 250100, China
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University , Guangzhou 510632, China
| | - David A Winkler
- CSIRO Manufacturing , Clayton 3168, Australia
- Monash Institute of Pharmaceutical Sciences , Parkville 3052, Australia
- Latrobe Institute for Molecular Science , Bundoora, 3046, Australia
- School of Chemical and Physical Science, Flinders University , Bedford Park 5042, Australia
| | - Jianjie Fu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences , Beijing 100190, China
| | - Aiqian Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences , Beijing 100190, China
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Horáková E, Drabina P, Brož B, Štěpánková Š, Vorčáková K, Královec K, Havelek R, Sedlák M. Synthesis, characterization and in vitro evaluation of substituted N-(2-phenylcyclopropyl)carbamates as acetyl- and butyrylcholinesterase inhibitors. J Enzyme Inhib Med Chem 2016; 31:173-179. [PMID: 27476673 DOI: 10.1080/14756366.2016.1212193] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
A serie of O-substituted N-2-phenylcyclopropylcarbamates was prepared and characterized. These carbamates were tested as inhibitors of acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). It was found, that these compounds exhibit moderate inhibition activity with values of IC50 in the range of 54.8-94.4 μM (for AChE) and up to 5.8 μM (for BChE). The AChE/BChE selectivity for each carbamate was calculated. These values varied from 0.50 to 9.46, two carbamate derivatives inhibited only AChE selectively. The most promising derivative was prepared in all optically pure forms (four isomers). It was found that individual stereoisomers differed only slightly in the inhibition ability. The cytotoxicity of all carbamates was evaluated using the standard in vitro test with Jurkat cells. With regard to their inhibition activity and cytotoxicity as well as easy preparation, O-substituted N-2-phenylcyclopropylcarbamates can be considered as promising compounds for potential medicinal applications.
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Affiliation(s)
- Eva Horáková
- a Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic and
| | - Pavel Drabina
- a Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic and
| | - Břetislav Brož
- a Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic and
| | - Šárka Štěpánková
- b Department of Biological and Biochemical Sciences , Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic
| | - Katarína Vorčáková
- b Department of Biological and Biochemical Sciences , Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic
| | - Karel Královec
- b Department of Biological and Biochemical Sciences , Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic
| | - Radim Havelek
- b Department of Biological and Biochemical Sciences , Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic
| | - Miloš Sedlák
- a Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice , Pardubice , Czech Republic and
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The Red Blood Cell Acetylcholinesterase Levels of Depressive Patients with Suicidal Behavior in an Agricultural Area. Indian J Clin Biochem 2016; 31:473-9. [PMID: 27605747 DOI: 10.1007/s12291-016-0558-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 02/01/2016] [Indexed: 10/22/2022]
Abstract
Long-term exposure to organophosphate pesticides (OPs) without acute poisoning can lead to various OPs. Environmental exposure to organophosphate pesticides may be associated with depression and suicide attempts in a population living in a rural agricultural area. Patients (n = 149) suffering from major depressive disorder (with and without attempted suicide) and a control group of healthy individuals (n = 64) who had been living in the same rural district for at least 1 year were selected. Red blood cell acetylcholine esterase (RBC-AChE) activity was examined as the basis of evaluating the degree of chronic environmental exposure to OPs residues. There were negative association between RBC-AChE activity levels and suicide attempts, the number of past suicide attempts and hopelessness levels in the depressive patients. The results of the study may support the idea that environmental exposure to OPs may be associated with mental health in individuals living in agricultural districts who are not farmers or working in occupations with access to OPs.
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Ma Q, Ruan YY, Xu H, Shi XM, Wang ZX, Hu YL. Safflower yellow reduces lipid peroxidation, neuropathology, tau phosphorylation and ameliorates amyloid β-induced impairment of learning and memory in rats. Biomed Pharmacother 2015; 76:153-64. [PMID: 26653563 DOI: 10.1016/j.biopha.2015.10.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 10/26/2015] [Indexed: 11/16/2022] Open
Abstract
Insoluble plaques of amyloid β proteins (Aβ) and neurofibrillary tangles of hyperphosphorylated tau are key markers for Alzheimer's disease (AD). Safflower yellow (SY) is one of traditional Chinese medicine extracted from safflower, which is suggested to have therapeutic potential for neurodegenerative disorders. However, whether SY can ameliorate impairment of learning and memory in AD model, and its causal mechanism are still unclear. Here, we applied different doses of SY intragastrically to Wistar rats injected with amyloid β (1-42) for 1 month. By the Morris water maze test, we found that treatment of SY significantly attenuated amyloid β (1-42)-induced impairment of memory in rats. Mechanistically, SY treatment increased the level of superoxidedismutase (SOD) and Glutathione peroxidase (GSH-Px), and decreased the level of malondialdehyde (MDA) and acetylcholinesterase (T-CHE) in brain tissues of AD rats. Pathological analysis also showed that SY treatment inhibited the morphological alteration of neurons and tau hyperphosphorylation induced by amyloid β (1-42)-injection in the cortex and hippocampus. Moreover, SY treatment inhibited CDK-5 and GSK-3 signaling pathways, which are upregulated in AD rats. Our data indicate that safflower yellow can serve as a therapeutic candidate for Alzheimer's disease.
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Affiliation(s)
- Qin Ma
- Shihezi University, Shihezi, Xinjiang 832000, PR China; Yili Friendship Hospital, Yining, Xinjiang 835000, PR China
| | | | - Hui Xu
- Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Xiao-meng Shi
- Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Zhi-xiang Wang
- Graduate student office, Shihezi University, Shihezi, Xinjiang 832000, PR China
| | - Yan-li Hu
- Shihezi University, Shihezi, Xinjiang 832000, PR China.
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20
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Lee J, Lee B, Park Y, Kim Y. Effects of combined fine motor skill and cognitive therapy to cognition, degree of dementia, depression, and activities of daily living in the elderly with Alzheimer's disease. J Phys Ther Sci 2015; 27:3151-4. [PMID: 26644663 PMCID: PMC4668154 DOI: 10.1589/jpts.27.3151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 07/10/2015] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study evaluated the effects of combined fine motor skill and cognitive therapies on cognition, depression, and activities of daily living in elderly patients with Alzheimer's disease (AD). [Subjects and Methods] Twenty-six participants comprised 2 groups. The experimental group (n=13) received combined fine motor skill and cognitive therapy, and the control group (n=13) received only general medical care. [Results] The experimental group showed improvements in cognition, degree of dementia, depression, and activities of daily living compared to the control group. However, there were no significant differences between the two groups. [Conclusion] These results suggest that combined fine motor skill and cognitive therapy improves cognition, degree of dementia, depression, and daily living in elderly patients with AD. These therapies would therefore be effective as general medical care strategies.
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Affiliation(s)
- Jin Lee
- Graduate School of Physical Therapy, Sahmyook University, Republic of Korea
| | - ByoungHee Lee
- Deptartment of Physical Therapy, Sahmyook University, Republic of Korea
| | - YuHyung Park
- Graduate School of Physical Therapy, Sahmyook University, Republic of Korea
| | - Yumi Kim
- Graduate School of Physical Therapy, Sahmyook University, Republic of Korea
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21
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Rahman MA, Abdullah N, Aminudin N. Interpretation of mushroom as a common therapeutic agent for Alzheimer’s disease and cardiovascular diseases. Crit Rev Biotechnol 2015; 36:1131-1142. [DOI: 10.3109/07388551.2015.1100585] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Mohammad Azizur Rahman
- Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia and
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka Bangladesh
| | - Noorlidah Abdullah
- Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia and
| | - Norhaniza Aminudin
- Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia and
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22
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Singh M, Kaur M, Chadha N, Silakari O. Hybrids: a new paradigm to treat Alzheimer’s disease. Mol Divers 2015; 20:271-97. [DOI: 10.1007/s11030-015-9628-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 07/29/2015] [Indexed: 12/19/2022]
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Giri BR, Roy B. Resveratrol- and α-viniferin-induced alterations of acetylcholinesterase and nitric oxide synthase in Raillietina echinobothrida. Parasitol Res 2015; 114:3775-81. [PMID: 26141435 DOI: 10.1007/s00436-015-4607-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 06/25/2015] [Indexed: 11/28/2022]
Abstract
Phytostilbenes, like resveratrol and α-viniferin, which occur mainly in the plants and belong to the families Cyperaceae, Vitaceae, and Gnetaceae are extensively popular for their medicinal and nutritional properties. In Northeast India, the Jaintia tribes consume these phytochemicals through aqueous extract of the medicinal plant Carex baccans to control helminthiasis. The present study aimed to investigate the inhibitory effect of the phytochemicals on neurotransmitters and its related enzymes in helminth parasite Raillietina echinobothrida. Viability of the parasites exposed to the phytostilbenes and extent of inhibition of cholinergic and nitrergic enzymes were evaluated in comparison to reference anthelmintic drug praziquantel and two known enzyme inhibitors, namely Nω-nitro-L-arginine and pyridostigmine. On exposure to resveratrol, α-viniferin, and reference drug praziquantel, the parasites ceased movement at 9.37, 11.38, and 0.24 h followed by death at 23.65, 34.13, and 1.87 h, respectively. Exposed parasites also showed a significant decrease in the activity of acetylcholinesterase (46.101, 65.935, and 63.645%) and nitric oxide synthase (61.241, 55.046, and 29.618%) in comparison to the controls. In addition, a decreased trend in nitric oxide (NO) level was also detected in the tissue of different phytochemical-exposed parasites compared to control. The present study suggests that anthelmintic potential of both the phytochemicals is mediated through inhibition of two vital enzymes which play diverse role in intracellular communications through neuromuscular system.
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Affiliation(s)
- Bikash Ranjan Giri
- Parasitology Laboratory, Department of Zoology, North-Eastern Hill University, Shillong, 793022, Meghalaya, India
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Proaporphine and aporphine alkaloids with acetylcholinesterase inhibitory activity from Stephania epigaea. Fitoterapia 2015; 104:102-7. [PMID: 26028544 DOI: 10.1016/j.fitote.2015.05.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 05/22/2015] [Accepted: 05/24/2015] [Indexed: 11/20/2022]
Abstract
An unusual proaporphine alkaloid bearing an isopropanenitrile group at isoquinoline nitrogen, named epiganine A (1) and a new aporphine alkaloid, epiganine B (2), together with eight known alkaloids, pronuciferine (3), dehydrodicentrine (4), romerine (5), romeline (6), N-methylcalycinine (7), phanostenine (8), dicentrine (9), and N-methyllaurotetanine (10), were isolated from the roots of Stephania epigaea. The absolute configuration of 1 was determined by calculating electronic circular dichroism (ECD) and comparing with experimental data. Compounds 2 and 4 showed strong acetylcholinesterase (AChE) inhibitory effects with the IC50 values of 4.36 and 2.98μM, respectively. Compounds 5-9 also exhibited potent AChE inhibitory activities.
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25
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Hameed A, Zehra ST, Shah SJA, Khan KM, Alharthy RD, Furtmann N, Bajorath J, Tahir MN, Iqbal J. Syntheses, Cholinesterases Inhibition, and Molecular Docking Studies of Pyrido[2,3-b
]pyrazine Derivatives. Chem Biol Drug Des 2015; 86:1115-20. [DOI: 10.1111/cbdd.12579] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 04/17/2015] [Accepted: 04/27/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Abdul Hameed
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi 75270 Pakistan
| | - Syeda T. Zehra
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi 75270 Pakistan
| | - Syed J. A. Shah
- Centre for Advanced Drug Research; COMSATS Institute of Information Technology; Abbottabad 22060 Pakistan
| | - Khalid M. Khan
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi 75270 Pakistan
| | - Rima D. Alharthy
- Department of Chemistry; King Abdulaziz University; Jeddah Saudi Arabia
| | - Norbert Furtmann
- Department of Life Science Informatics, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry; Rheinische Friedrich-Wilhelms-Universität; Dahlmann Str. 2 D-53113 Bonn Germany
- Pharmaceutical Institute; University of Bonn; An der Immenburg 4 D-53121 Bonn Germany
| | - Jürgen Bajorath
- Department of Life Science Informatics, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry; Rheinische Friedrich-Wilhelms-Universität; Dahlmann Str. 2 D-53113 Bonn Germany
| | | | - Jamshed Iqbal
- Centre for Advanced Drug Research; COMSATS Institute of Information Technology; Abbottabad 22060 Pakistan
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Cho M, Kim D, Chung J, Park J, You H, Yang Y. Effects of a cognitive-enhancement group training program on daily living activities, cognition, and depression in the demented elderly. J Phys Ther Sci 2015; 27:681-4. [PMID: 25931707 PMCID: PMC4395691 DOI: 10.1589/jpts.27.681] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 10/10/2014] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The effects of a cognitive enhancement group training program on daily living
activities, cognition, and depression in the demented elderly population of a local Korean
community were investigated. [Subjects and Methods] The study included 22 elderly subjects
who were 65 years of age or older, had been diagnosed with dementia, and were attending a
daily care center in K City, Republic of Korea. Eleven subjects participated in the
program, which was conducted twice a week for 8 weeks for a total of 16 sessions. Eleven
subjects in a non-training group did not receive any interventions. [Results] The MMSE-K,
MBI and KDS scores of all of the eleven subjects who participated in the program improved,
and the improvements were statistically significant. [Conclusion] Cognitive enhancement
group training programs may have positive effects on daily living activities, cognition,
and depression.
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Affiliation(s)
- MiLim Cho
- Department of Occupational Therapy, Kimcheon Science College, Republic of Korea
| | - DeokJu Kim
- Department of Occupational Therapy, Sorabol College, Republic of Korea
| | - JaeYeop Chung
- Department of Occupational Therapy, Kyongbuk Science College, Republic of Korea
| | - JuHyung Park
- Department of Occupational Therapy, Kyungbuk College, Republic of Korea
| | - HeeCheon You
- Department of Industrial and Management Engineering, Pohang University, Republic of Korea
| | - YeongAe Yang
- Department of Occupational Therapy, College of Biomedical Sciences and Engineering, Inje University, Republic of Korea
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Braga ILS, Silva PN, Furuya TK, Santos LC, Pires BC, Mazzotti DR, Bertolucci PH, Cendoroglo MS, Smith MC. Effect of APOE and CHRNA7 genotypes on the cognitive response to cholinesterase inhibitor treatment at different stages of Alzheimer's disease. Am J Alzheimers Dis Other Demen 2015; 30:139-44. [PMID: 24951635 PMCID: PMC10852661 DOI: 10.1177/1533317514539540] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The loss of cholinergic transmission is considered to be an important cause of Alzheimer's disease (AD). Treatment with acetyl cholinesterase inhibitors (ChEIs) shows benefits; however, great heterogeneity has been observed in patient responses. We evaluated apolipoprotein E (APOE) and α7 nicotinic receptor (CHRNA7) single-nucleotide polymorphisms (SNPs) and associated these SNPs with pharmacological responses to ChEIs in a Brazilian population with AD. We studied 177 outpatients using ChEIs, and they were classified as responders and nonresponders according to variation in Mini-Mental State Examination (MMSE) status. The analysis of APOE genotypes showed that patients with the ε4 allele had a worse response than those without the ε4 allele. We observed an association between the CHRNA7 T allele and a better response to treatment with ChEIs in patients with mild AD (MMSE ≥ 20). The SNP rs6494223 of CHRNA7 as well as APOEε4 could be useful for understanding the response to ChEI treatment in patients with AD.
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Affiliation(s)
- Ianna Lacerda Sampaio Braga
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
| | - Patricia Natalia Silva
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
| | - Tatiane Katsue Furuya
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
| | - Leonardo Caires Santos
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
| | - Belisa Caldana Pires
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
| | - Diego Robles Mazzotti
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
| | - Paulo Henrique Bertolucci
- Disciplina de Neurologia Clínica, Departamento de Neurologia e Neurocirurgia (UNIFESP), São Paulo-SP, Brazil
| | - Maysa Seabra Cendoroglo
- Disciplina de Geriatria e Gerontologia, Departamento de Medicina (UNIFESP), São Paulo-SP, Brazil
| | - Marília Cardoso Smith
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), São Paulo-SP, Brazil
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Ionic liquid mediated synthesis and molecular docking study of novel aromatic embedded Schiff bases as potent cholinesterase inhibitors. Bioorg Chem 2014; 57:162-168. [DOI: 10.1016/j.bioorg.2014.10.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 10/14/2014] [Accepted: 10/22/2014] [Indexed: 01/16/2023]
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29
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Zipp GG, Barbosa J, Green MA, Terranova KM, Fink C, Yu XC, Nouraldeen A, Wilson A, Savelieva K, Lanthorn TH, David Kimball S. Novel inhibitors of the high-affinity l-proline transporter as potential therapeutic agents for the treatment of cognitive disorders. Bioorg Med Chem Lett 2014; 24:3886-90. [DOI: 10.1016/j.bmcl.2014.06.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 10/25/2022]
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Development of dual inhibitors against Alzheimer's disease using fragment-based QSAR and molecular docking. BIOMED RESEARCH INTERNATIONAL 2014; 2014:979606. [PMID: 25019089 PMCID: PMC4075005 DOI: 10.1155/2014/979606] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 03/27/2014] [Accepted: 03/27/2014] [Indexed: 12/17/2022]
Abstract
Alzheimer's (AD) is the leading cause of dementia among elderly people. Considering the complex heterogeneous etiology of AD, there is an urgent need to develop multitargeted drugs for its suppression. β-amyloid cleavage enzyme (BACE-1) and acetylcholinesterase (AChE), being important for AD progression, have been considered as promising drug targets. In this study, a robust and highly predictive group-based QSAR (GQSAR) model has been developed based on the descriptors calculated for the fragments of 20 1,4-dihydropyridine (DHP) derivatives. A large combinatorial library of DHP analogues was created, the activity of each compound was predicted, and the top compounds were analyzed using refined molecular docking. A detailed interaction analysis was carried out for the top two compounds (EDC and FDC) which showed significant binding affinity for BACE-1 and AChE. This study paves way for consideration of these lead molecules as prospective drugs for the effective dual inhibition of BACE-1 and AChE. The GQSAR model provides site-specific clues about the molecules where certain modifications can result in increased biological activity. This information could be of high value for design and development of multifunctional drugs for combating AD.
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Stasiuk M, Janiszewska A, Kozubek A. Phenolic lipids affect the activity and conformation of acetylcholinesterase from Electrophorus electricus (Electric eel). Nutrients 2014; 6:1823-31. [PMID: 24787269 PMCID: PMC4042574 DOI: 10.3390/nu6051823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/12/2014] [Accepted: 04/03/2014] [Indexed: 12/16/2022] Open
Abstract
Phenolic lipids were isolated from rye grains, cashew nutshell liquid (CNSL) from Anacardium occidentale, and fruit bodies of Merrulius tremellosus, and their effects on the electric eel acetylcholinesterase activity and conformation were studied. The observed effect distinctly depended on the chemical structure of the phenolic lipids that were available for interaction with the enzyme. All of the tested compounds reduced the activity of acetylcholinesterase. The degree of inhibition varied, showing a correlation with changes in the conformation of the enzyme tested by the intrinsic fluorescence of the Trp residues of the protein.
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Affiliation(s)
- Maria Stasiuk
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
| | - Alicja Janiszewska
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
| | - Arkadiusz Kozubek
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
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Basiri A, Murugaiyah V, Osman H, Kumar RS, Kia Y, Hooda A, Parsons RB. Cholinesterase inhibitory activity versus aromatic core multiplicity: A facile green synthesis and molecular docking study of novel piperidone embedded thiazolopyrimidines. Bioorg Med Chem 2014; 22:906-16. [DOI: 10.1016/j.bmc.2013.11.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 11/08/2013] [Accepted: 11/09/2013] [Indexed: 01/05/2023]
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da Cunha Xavier Soares SF, Vieira AA, Delfino RT, Figueroa-Villar JD. NMR determination of Electrophorus electricus acetylcholinesterase inhibition and reactivation by neutral oximes. Bioorg Med Chem 2013; 21:5923-30. [DOI: 10.1016/j.bmc.2013.05.063] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/21/2013] [Accepted: 05/29/2013] [Indexed: 12/20/2022]
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Poorthuis RB, Mansvelder HD. Nicotinic acetylcholine receptors controlling attention: behavior, circuits and sensitivity to disruption by nicotine. Biochem Pharmacol 2013; 86:1089-98. [PMID: 23856288 DOI: 10.1016/j.bcp.2013.07.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/01/2013] [Accepted: 07/02/2013] [Indexed: 11/26/2022]
Abstract
Attention is a central cognitive function that enables long-term engagement in a task and suppression of irrelevant information to obtain future goals. The prefrontal cortex (PFC) is the main link in integrating emotional and motivational state of an animal to regulate top-down attentional processes. Acetylcholine modulates PFC neuronal networks by activating nicotinic acetylcholine receptors (nAChRs) to support attention. However, how neuronal activity changes in the PFC during attention and which nAChR subtypes mediate this is only rudimentarily understood, but progress is being made. Recently, exciting new insights were obtained in the dynamics of cholinergic signaling in the PFC and modes of acetylcholine transmission via nAChRs in the cortex. In addition, mechanisms are uncovered on how the PFC circuitry is regulated by nAChRs. Novel studies show that endogenous activation of nAChRs in the PFC plays a central role in controlling attention. Here, we review current insights into how different subtypes of nAChRs expressed by distinct types of neurons in the PFC circuitry shape attention. In addition we discuss the impact of nicotine on the cholinergic system and prefrontal cortical circuits. Low concentrations of nicotine, as experienced by smokers, interfere with cholinergic signaling. In the long-term exposure to nicotine during adolescence leads to maladaptive adaptations of the PFC circuitry, which ultimately leads to a decrement in attention performance, again emphasizing the importance of nAChRs in attention.
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Affiliation(s)
- Rogier B Poorthuis
- Department of Integrative Neurophysiology, CNCR, Neuroscience Campus Amsterdam, VU University, Amsterdam, The Netherlands
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35
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Basiri A, Murugaiyah V, Osman H, Kumar RS, Kia Y, Awang KB, Ali MA. An expedient, ionic liquid mediated multi-component synthesis of novel piperidone grafted cholinesterase enzymes inhibitors and their molecular modeling study. Eur J Med Chem 2013; 67:221-9. [PMID: 23871902 DOI: 10.1016/j.ejmech.2013.06.054] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 06/19/2013] [Accepted: 06/24/2013] [Indexed: 11/17/2022]
Abstract
Series of hitherto unreported piperidone grafted pyridopyrimidines synthesized through ionic liquid mediated multi-component reaction. These compounds were evaluated for their inhibitory activities against AChE and BChE enzymes. All the compounds displayed considerable potency against AChE with IC50 values ranging from 0.92 to 9.11 μM, therein compounds 6a, 6h and 6i displayed superior enzyme inhibitory activities compared to standard drug with IC50 values of 0.92, 1.29 and 2.07 μM. Remarkably, all the compounds displayed higher BChE inhibitory activity compared to galantamine with IC50 values of 1.89-8.13 μM. Molecular modeling, performed for the most active compounds using three dimensional crystal structures of TcAChE and hBChE, disclosed binding template of these inhibitors into the active site of their respective enzymes.
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Affiliation(s)
- Alireza Basiri
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
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36
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Samadi A, de la Fuente Revenga M, Pérez C, Iriepa I, Moraleda I, Rodríguez-Franco MI, Marco-Contelles J. Synthesis, pharmacological assessment, and molecular modeling of 6-chloro-pyridonepezils: new dual AChE inhibitors as potential drugs for the treatment of Alzheimer's disease. Eur J Med Chem 2013; 67:64-74. [PMID: 23838422 DOI: 10.1016/j.ejmech.2013.06.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 05/31/2013] [Accepted: 06/04/2013] [Indexed: 12/30/2022]
Abstract
6-Chloro-pyridonepezils are chloropyridine-donepezil hybrids designed by combining the N-benzylpiperidine moiety present in donepezil with the 2-chloropyridine-3,5-dicarbonitrile heterocyclic ring system, both connected by an appropriate polymethylene linker. 6-Chloro-pyridonepezils1-8 were prepared by reaction of 2,6-dichloro-4-phenylpyridine-3,5-dicarbonitrile (13) [or 2,6-dichloropyridine-3,5-dicarbonitrile (14)] with suitable 2-(1-benzylpiperidin-4-yl)alkylamines (9-12). The biological evaluation showed that these new compounds are cholinesterase inhibitors, in the submicromolar range, one of them (6) being a potent hBuChE inhibitor (IC50 = 0.47 ± 0.08 μM). 6-Chloro-pyridonepezils4, 7 and 8 are potent hAChE inhibitors showing IC50 in the 0.013-0.054 μM range. Particularly, 6-chloro-pyridonepezil8 is 625-fold more selective for hAChE than for hBuChE and compared to donepezil is equipotent for the inhibition of hAChE. Molecular modeling investigation on 6-chloro-pyridonepezils4, 6-8 supports its dual AChE inhibitory profile, by binding simultaneously at the catalytic active and at peripheral anionic sites of the enzyme. The in vitro Blood Brain Barrier (BBB) and theoretical ADME analysis of 6-chloro-pyridonepezils1-8 have been carried out. Overall, compound 8, is a permeable potent and selective dual AChEI that can be considered as a good candidate with potential impact for further pharmacological development in Alzheimer's therapy.
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Affiliation(s)
- Abdelouahid Samadi
- Laboratorio de Química Médica, Instituto de Química Orgánica General (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
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Silva D, Chioua M, Samadi A, Agostinho P, Garção P, Lajarín-Cuesta R, de los Ríos C, Iriepa I, Moraleda I, Gonzalez-Lafuente L, Mendes E, Pérez C, Rodríguez-Franco MI, Marco-Contelles J, Carmo Carreiras M. Synthesis, pharmacological assessment, and molecular modeling of acetylcholinesterase/butyrylcholinesterase inhibitors: effect against amyloid-β-induced neurotoxicity. ACS Chem Neurosci 2013; 4:547-65. [PMID: 23379636 DOI: 10.1021/cn300178k] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The synthesis, molecular modeling, and pharmacological analysis of phenoxyalkylamino-4-phenylnicotinates (2-7), phenoxyalkoxybenzylidenemalononitriles (12, 13), pyridonepezils (14-18), and quinolinodonepezils (19-21) are described. Pyridonepezils 15-18 were found to be selective and moderately potent regarding the inhibition of hAChE, whereas quinolinodonepezils 19-21 were found to be poor inhibitors of hAChE. The most potent and selective hAChE inhibitor was ethyl 6-(4-(1-benzylpiperidin-4-yl)butylamino)-5-cyano-2-methyl-4-phenylnicotinate (18) [IC(50) (hAChE) = 0.25 ± 0.02 μM]. Pyridonepezils 15-18 and quinolinodonepezils 20-21 are more potent selective inhibitors of EeAChE than hAChE. The most potent and selective EeAChE inhibitor was ethyl 6-(2-(1-benzylpiperidin-4-yl)ethylamino)-5-cyano-2-methyl-4-phenylnicotinate (16) [IC(50) (EeAChE) = 0.0167 ± 0.0002 μM], which exhibits the same inhibitory potency as donepezil against hAChE. Compounds 2, 7, 13, 17, 18, 35, and 36 significantly prevented the decrease in cell viability caused by Aβ(1-42). All compounds were effective in preventing the enhancement of AChE activity induced by Aβ(1-42). Compounds 2-7 caused a significant reduction whereas pyridonepezils 17 and 18, and compound 16 also showed some activity. The pyrazolo[3,4-b]quinolines 36 and 38 also prevented the upregulation of AChE induced by Aβ(1-42). Compounds 2, 7, 12, 13, 17, 18, and 36 may act as antagonists of voltage sensitive calcium channels, since they significantly prevented the Ca(2+) influx evoked by KCl depolarization. Docking studies show that compounds 16 and 18 adopted different orientations and conformations inside the active-site gorges of hAChE and hBuChE. The structural and energetic features of the 16-AChE and 18-AChE complexes compared to the 16-BuChE and 18-BuChE complexes account for a higher affinity of the ligand toward AChE. The present data indicate that compounds 2, 7, 17, 18, and 36 may represent attractive multipotent molecules for the potential treatment of Alzheimer's disease.
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Affiliation(s)
- Daniel Silva
- Research Institute for Medicines and Pharmaceutical
Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
- Laboratorio de Química Médica (IQOG, CSIC), C/Juan de
la Cierva 3, 28006-Madrid, Spain
| | - Mourad Chioua
- Laboratorio de Química Médica (IQOG, CSIC), C/Juan de
la Cierva 3, 28006-Madrid, Spain
| | - Abdelouahid Samadi
- Laboratorio de Química Médica (IQOG, CSIC), C/Juan de
la Cierva 3, 28006-Madrid, Spain
| | - Paula Agostinho
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Pedro Garção
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Rocío Lajarín-Cuesta
- Instituto Teófilo Hernando, Fundación
de Investigación Biomédica, Hospital Universitario de la Princesa, C/Diego de Léon, 62, 28006-Madrid,
Spain
| | - Cristobal de los Ríos
- Instituto Teófilo Hernando, Fundación
de Investigación Biomédica, Hospital Universitario de la Princesa, C/Diego de Léon, 62, 28006-Madrid,
Spain
| | - Isabel Iriepa
- Departamento de Química
Orgánica. Universidad de Alcalá, Ctra. Madrid-Barcelona, Km. 33,6, 28871, Alcalá de Henares,
Madrid, Spain
| | - Ignacio Moraleda
- Departamento de Química
Orgánica. Universidad de Alcalá, Ctra. Madrid-Barcelona, Km. 33,6, 28871, Alcalá de Henares,
Madrid, Spain
| | - Laura Gonzalez-Lafuente
- Instituto Teófilo Hernando, Fundación
de Investigación Biomédica, Hospital Universitario de la Princesa, C/Diego de Léon, 62, 28006-Madrid,
Spain
| | - Eduarda Mendes
- Research Institute for Medicines and Pharmaceutical
Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Concepción Pérez
- Instituto
de Química Médica, Consejo Superior de Investigaciones Científicas (IQM-CSIC), C/Juan
de la Cierva 3, 28006-Madrid, Spain
| | - María Isabel Rodríguez-Franco
- Instituto
de Química Médica, Consejo Superior de Investigaciones Científicas (IQM-CSIC), C/Juan
de la Cierva 3, 28006-Madrid, Spain
| | - José Marco-Contelles
- Laboratorio de Química Médica (IQOG, CSIC), C/Juan de
la Cierva 3, 28006-Madrid, Spain
| | - M. Carmo Carreiras
- Research Institute for Medicines and Pharmaceutical
Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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Liu JQ, Peng XR, Li XY, Li TZ, Zhang WM, Shi L, Han J, Qiu MH. Norfriedelins A–C with Acetylcholinesterase Inhibitory Activity from Acerola Tree (Malpighia emarginata). Org Lett 2013; 15:1580-3. [PMID: 23484960 DOI: 10.1021/ol4003702] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie-Qing Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Xing-Rong Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Xu-Yang Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Ting-Zhao Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Wei-Ming Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Lei Shi
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Jiang Han
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
| | - Ming-Hua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China, University of Chinese Academy of Sciences, Beijing 100049, China, Amway (China) Botanical Research Center, Wuxi 214115, China
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Guo Y, Pan D, Wu Z, Zhao C, Cao J. Antioxidant activity and oxidative stress protection of duck proteins hydrolysates in SK-N-SH cells. Food Funct 2013; 4:476-80. [PMID: 23295546 DOI: 10.1039/c2fo30264k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studies have found that natural antioxidants, which are free-radical scavengers, can reduce the risk of diseases caused by free radicals. This work investigated the antioxidant properties of duck proteins hydrolysates. The free-radical scavenging function of CP-1 (M(r) > 10 kDa), CP-2 (5 kDa < M(r) < 10 kDa) and CP-3 (M(r) < 5 kDa), obtained through ultrafiltration and gel filtration were evaluated. The results showed that the lower molecular weight fraction exhibited a stronger free-radical scavenging ability. The highest free-radical scavenging activity was detected in the fraction of p4 purified from CP-3 using Sephadex G-15 column chromatography. The 50% inhibitory value (IC(50)) of p4 for scavenging radicals of superoxide, hydroxyl and 1,1-diphenyl-2-pycrylhydrazyl (DPPH) were, respectively, 0.97 mg mL(-1), 0.84 mg mL(-1) and 1.84 mg mL(-1). Furthermore, the p4 fraction at a concentration of 10 μg mL(-1) increased cell viability from 84.8% to 94% under antioxidative stress in neuroblastoma SK-N-SH cells.
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Affiliation(s)
- Yuxing Guo
- Food Science and Nutrition Department, Ginling College, Nanjing Normal University, Nanjing 210097, P R China
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40
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Spilovska K, Korabecny J, Kral J, Horova A, Musilek K, Soukup O, Drtinova L, Gazova Z, Siposova K, Kuca K. 7-Methoxytacrine-adamantylamine heterodimers as cholinesterase inhibitors in Alzheimer's disease treatment--synthesis, biological evaluation and molecular modeling studies. Molecules 2013; 18:2397-418. [PMID: 23429378 PMCID: PMC6270602 DOI: 10.3390/molecules18022397] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 01/24/2013] [Accepted: 02/04/2013] [Indexed: 01/30/2023] Open
Abstract
A structural series of 7-MEOTA-adamantylamine thioureas was designed, synthesized and evaluated as inhibitors of human acetylcholinesterase (hAChE) and human butyrylcholinesterase (hBChE). The compounds were prepared based on the multi-target-directed ligand strategy with different linker lengths (n = 2-8) joining the well-known NMDA antagonist adamantine and the hAChE inhibitor 7-methoxytacrine (7-MEOTA). Based on in silico studies, these inhibitors proved dual binding site character capable of simultaneous interaction with the peripheral anionic site (PAS) of hAChE and the catalytic active site (CAS). Clearly, these structural derivatives exhibited very good inhibitory activity towards hBChE resulting in more selective inhibitors of this enzyme. The most potent cholinesterase inhibitor was found to be thiourea analogue 14 (with an IC₅₀ value of 0.47 µM for hAChE and an IC₅₀ value of 0.11 µM for hBChE, respectively). Molecule 14 is a suitable novel lead compound for further evaluation proving that the strategy of dual binding site inhibitors might be a promising direction for development of novel AD drugs.
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Affiliation(s)
- Katarina Spilovska
- Department of Toxicology, Trebesska 1575, Faculty of Military Health Sciences, University of Defence, 500 01 Hradec Kralove, Czech Republic; E-Mails: (K.S.); (J.K.); (A.H.); (K.M.); (L.D.)
| | - Jan Korabecny
- Department of Toxicology, Trebesska 1575, Faculty of Military Health Sciences, University of Defence, 500 01 Hradec Kralove, Czech Republic; E-Mails: (K.S.); (J.K.); (A.H.); (K.M.); (L.D.)
- University Hospital, Biomedicinal Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; E-Mail: (O.S.)
| | - Jan Kral
- Department of Pharmaceutical Chemistry and Drug Control, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic; E-Mail:
| | - Anna Horova
- Department of Toxicology, Trebesska 1575, Faculty of Military Health Sciences, University of Defence, 500 01 Hradec Kralove, Czech Republic; E-Mails: (K.S.); (J.K.); (A.H.); (K.M.); (L.D.)
| | - Kamil Musilek
- Department of Toxicology, Trebesska 1575, Faculty of Military Health Sciences, University of Defence, 500 01 Hradec Kralove, Czech Republic; E-Mails: (K.S.); (J.K.); (A.H.); (K.M.); (L.D.)
- University Hospital, Biomedicinal Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; E-Mail: (O.S.)
- Department of Chemistry, Faculty of Sciences, University of Hradec Kralove, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Ondrej Soukup
- University Hospital, Biomedicinal Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; E-Mail: (O.S.)
| | - Lucie Drtinova
- Department of Toxicology, Trebesska 1575, Faculty of Military Health Sciences, University of Defence, 500 01 Hradec Kralove, Czech Republic; E-Mails: (K.S.); (J.K.); (A.H.); (K.M.); (L.D.)
| | - Zuzana Gazova
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; E-Mails: (Z.G.); (K.S.)
| | - Katarina Siposova
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; E-Mails: (Z.G.); (K.S.)
- Faculty of Sciences, Institute of Chemistry, P. J. Safarik University, Srobarova 2, 041 54 Kosice, Slovakia
| | - Kamil Kuca
- University Hospital, Biomedicinal Research Centre, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; E-Mail: (O.S.)
- Centre of Advanced Studies, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic; E-Mail:
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41
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Effect of hypoxanthine, antioxidants and allopurinol on cholinesterase activities in rats. J Neural Transm (Vienna) 2013; 120:1359-67. [DOI: 10.1007/s00702-013-0989-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 01/29/2013] [Indexed: 10/27/2022]
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Trinh Thi Thanh V, Doan Thi Mai H, Pham VC, Litaudon M, Dumontet V, Guéritte F, Nguyen VH, Chau VM. Acetylcholinesterase inhibitors from the leaves of Macaranga kurzii. JOURNAL OF NATURAL PRODUCTS 2012; 75:2012-2015. [PMID: 23134335 DOI: 10.1021/np300660y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Bioassay-guided fractionation of an extract of leaves of Macaranga kurzii yielded four new compounds, a stilbene (furanokurzin, 1) and three flavonoids (macakurzin A-C, 2-4). Nine known compounds were also isolated (5-13). Their structures were determined by spectroscopic analyses including MS and 2D NMR. The isolates were all evaluated for acetylcholinesterase inhibitory activity. Compound 6 (trans-3,5-dimethoxystilbene) exhibited the greatest activity (IC50 9 μM). Cytotoxic evaluation against KB cells showed that compound 7 had an IC50 of 4 μM, followed by 11 (IC50 10 μM) and 3 (IC50 13 μM).
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Affiliation(s)
- Van Trinh Thi Thanh
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
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43
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Samadi A, Estrada M, Pérez C, Rodríguez-Franco MI, Iriepa I, Moraleda I, Chioua M, Marco-Contelles J. Pyridonepezils, new dual AChE inhibitors as potential drugs for the treatment of Alzheimer's disease: synthesis, biological assessment, and molecular modeling. Eur J Med Chem 2012; 57:296-301. [PMID: 23078965 DOI: 10.1016/j.ejmech.2012.09.030] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Revised: 09/20/2012] [Accepted: 09/24/2012] [Indexed: 11/17/2022]
Abstract
The synthesis, biological assessment and molecular modeling of new pyridonepezils1-8, able to inhibit human acetylcholinesterase (hAChE) and human butyrylcholinesterase (hBuChE), are described. The new compounds have been designed as hybrids resulting from a conjunctive approach that combines the N-benzylpiperidine moiety, present in donepezil, and the 2-amino-6-chloropyridine heterocyclic ring system, connected by an appropriate polymethylene linker. Compounds 1-8 were prepared by reaction of 2-amino-6-chloro-4-phenylpyridine-3,5-dicarbonitrile (13) [or 2-amino-6-chloropyridine-3,5-dicarbonitrile (14)] with 2-(1-benzylpiperidin-4-yl)alkylamines (9-12). The biological evaluation of molecules 1-8 showed that compounds 1-6 are potent AChE inhibitors, in the submicromolar, while compounds 7 and 8 are on the nanomolar range, the most potent, 2-amino-6-((3-(1-benzylpiperidin-4-yl)propyl)amino)pyridine-3,5-dicarbonitrile (7), showing a IC(50) (hAChE) = 9.4 ± 0.4 nM. Inhibitors 2-8 are permeable as determined in the PAMPA assay. Compared to donepezil, compound 7 is in the same range of inhibitory activity for hAChE, and 703-fold more selective for hAChE than for hBuChE. Molecular modeling investigation on pyridonepezil7 supports its dual AChE inhibitory profile, binding simultaneously at the catalytic active and at peripheral anionic sites of the enzyme. The theoretical ADME analysis of pyridonepezils1-8 has been carried out. Overall, compound 7, a potent and selective dual AChEI, can be considered as a candidate with potential impact for further pharmacological development in Alzheimer's therapy.
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Affiliation(s)
- Abdelouahid Samadi
- Laboratorio de Química Médica, Instituto de Química Orgánica General (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
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Evaluation of acetylcholinesterase in an animal model of maple syrup urine disease. Mol Neurobiol 2012; 45:279-86. [PMID: 22328136 DOI: 10.1007/s12035-012-8243-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 02/01/2012] [Indexed: 10/14/2022]
Abstract
Maple syrup urine disease is an inherited metabolic disease predominantly characterized by neurological dysfunction. However, the mechanisms underlying the neuropathology of this disease are still not defined. Therefore, the aim of this study was to investigate the effect of acute and chronic administration of a branched-chain amino acids (BCAA) pool (leucine, isoleucine, and valine) on acetylcholinesterase (AChE) activity and gene expression in the brain and serum of rats and to assess if antioxidant treatment prevented the alterations induced by BCAA administration. Our results show that the acute administration of a BCAA pool in 10- and 30-day-old rats increases AChE activity in the cerebral cortex, striatum, hippocampus, and serum. Moreover, chronic administration of the BCAA pool also increases AChE activity in the structures studied, and antioxidant treatment prevents this increase. In addition, we show a significant decrease in the mRNA expression of AChE in the hippocampus following acute administration in 10- and 30-day-old rats. On the other hand, AChE expression increased significantly after chronic administration of the BCAA pool. Interestingly, the antioxidant treatment was able to prevent the increased AChE activity without altering AChE expression. In conclusion, the results from the present study demonstrate a marked increase in AChE activity in all brain structures following the administration of a BCAA pool. Moreover, the increased AChE activity is prevented by the coadministration of N-acetylcysteine and deferoxamine as antioxidants.
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45
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Reduction of butyrylcholinesterase activity in plasma from patients with disorders of propionate metabolism is prevented by treatment with L-carnitine and protein restriction. Clin Biochem 2012; 45:77-81. [DOI: 10.1016/j.clinbiochem.2011.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 10/17/2011] [Accepted: 10/20/2011] [Indexed: 01/12/2023]
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Selective cholinesterase inhibition by lanostane triterpenes from fruiting bodies of Ganoderma lucidum. Bioorg Med Chem Lett 2011; 21:6603-7. [DOI: 10.1016/j.bmcl.2011.04.042] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 04/04/2011] [Accepted: 04/08/2011] [Indexed: 11/20/2022]
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Silva D, Chioua M, Samadi A, Carmo Carreiras M, Jimeno ML, Mendes E, Ríos CDL, Romero A, Villarroya M, López MG, Marco-Contelles J. Synthesis and pharmacological assessment of diversely substituted pyrazolo[3,4-b]quinoline, and benzo[b]pyrazolo[4,3-g][1,8]naphthyridine derivatives. Eur J Med Chem 2011; 46:4676-81. [PMID: 21715067 DOI: 10.1016/j.ejmech.2011.05.068] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 05/20/2011] [Accepted: 05/26/2011] [Indexed: 01/14/2023]
Abstract
The synthesis and pharmacological analyses of a number of pyrazolo[3,4-b]quinoline and benzo[b]pyrazolo[4,3-g][1,8]naphthyridine derivatives are reported. We have synthesized the diversely substituted tacrine analogues 1-6, by Friedländer-type reaction of readily available o-amino-1-methyl-pyrazole-dicarbonitriles with cyclohexanone. The biological evaluation showed that pyrazolotacrines 1-6 are inhibitors of Electrophorus electricus acetylcholinesterase (EeAChE), in the micromolar range, and quite selective in respect to serum horse butyrylcholinesterase (eqBuChE) inhibition; the most interesting inhibitor is N-(5-amino-1-methyl-6,7,8,9-tetrahydro-1H-benzo[b]pyrazolo[4,3-g][1,8]naphthyridin-3-yl)acetamide (5) [IC(50) (EeAChE) = 0.069 ± 0.006 μM; IC(50) (eqBuChE) = 6.3 ± 0.6 μM]. Kinetic studies showed that compound 5 is a mixed-type inhibitor of EeAChE (K(i) = 155 nM). Inhibitor 5 showed a 45% neuroprotection value against rotenone/oligomycin A-induced neuronal death.
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Affiliation(s)
- Daniel Silva
- Research Institute for Medicines and Pharmaceutical Sciences, UL, Faculty of Pharmacy, University of Lisbon, Av Prof Gama Pinto, 1649-003 Lisbon, Portugal
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48
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Giridharan VV, Thandavarayan RA, Konishi T. Effect of Shengmai-san on cognitive performance and cerebral oxidative damage in BALB/c mice. J Med Food 2011; 14:601-9. [PMID: 21554136 DOI: 10.1089/jmf.2010.1362] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The aim of this study was to examine the effect of Shengmai-san (SMS) on learning and memory impairment induced by scopolamine (1 mg/kg, i.p.) in mice. The passive avoidance task (PAT) and Morris water maze (MWM) test served as the behavioral models for testing memory. To elucidate the mechanism of its cognitive-enhancing activity, the effects of SMS (2, 4, or 8 g/kg) on activities of acetylcholinesterase (AChE) and antioxidant enzymes and levels of acetylcholine (ACh) and nitrite were evaluated in brain homogenate. Tacrine (THA) (10 mg/kg, p.o.) was used as a reference drug. SMS (4 or 8 g/kg) significantly prevented scopolamine-induced impairments as measured by the PAT and MWM (probe trial session). SMS (4 or 8 g/kg) also significantly reduced the oxidative-nitrative stress, as evidenced by decreased malondialdehyde and nitrite levels and by its prevention of decreases in glutathione and superoxide dismutase levels. The activity of AChE was decreased in scopolamine-treated mice but was inhibited significantly by SMS treatment (4 or 8 g/kg) in both salt- and detergent-soluble fractions of brain homogenates. Further SMS treatment (4 or 8 g/kg) significantly increased the ACh levels in the brain homogenate to a level similar to that observed in THA treatment. Thus, the significant cognitive enhancement observed after 7 days of administration of SMS is closely related to the strong antioxidant properties of SMS in addition to its inhibition of brain AChE activity. These findings stress the critical impact of SMS on higher brain functions such as learning and memory.
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Affiliation(s)
- Vijayasree V Giridharan
- Department of Functional and Analytical Food Sciences, Niigata University of Pharmacy & Applied Life Sciences, Niigata City, Japan
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Dumas JA, Newhouse PA. The cholinergic hypothesis of cognitive aging revisited again: cholinergic functional compensation. Pharmacol Biochem Behav 2011; 99:254-61. [PMID: 21382398 DOI: 10.1016/j.pbb.2011.02.022] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Revised: 02/04/2011] [Accepted: 02/27/2011] [Indexed: 10/18/2022]
Abstract
It is now possible to reevaluate the cholinergic hypothesis of age-related cognitive dysfunction based on a synthesis of new evidence from cholinergic stimulation studies and cognitive models. We propose that a change of functional circuitry that can be observed through a combination of pharmacologic challenge and functional neuroimaging is associated with age-related changes in cholinergic system functioning. Psychopharmacological manipulations using cholinergic agonists and antagonists have been consistent in replicating patterns of aging seen in functional imaging studies. In addition, studies of anticholinesterase drugs in patients with Alzheimer's disease and mild cognitive impairment show support for the proposal that cholinergic compensation causes alterations in task-related brain activity. Thus, the cholinergic hypothesis of age-related cognitive dysfunction deserves further consideration as new methodologies for evaluating its validity are increasingly being used. Future directions for testing hypotheses generated from this model are presented.
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Affiliation(s)
- Julie A Dumas
- Clinical Neuroscience Research Unit and Brain Imaging Program, Department of Psychiatry, University of Vermont College of Medicine, Burlington, VT 05401, USA.
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50
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Terry AV, Callahan PM, Hall B, Webster SJ. Alzheimer's disease and age-related memory decline (preclinical). Pharmacol Biochem Behav 2011; 99:190-210. [PMID: 21315756 DOI: 10.1016/j.pbb.2011.02.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 01/21/2011] [Accepted: 02/01/2011] [Indexed: 01/05/2023]
Abstract
An unfortunate result of the rapid rise in geriatric populations worldwide is the increasing prevalence of age-related cognitive disorders such as Alzheimer's disease (AD). AD is a devastating neurodegenerative illness that is characterized by a profound impairment of cognitive function, marked physical disability, and an enormous economic burden on the afflicted individual, caregivers, and society in general. The rise in elderly populations is also resulting in an increase in individuals with related (potentially treatable) conditions such as "Mild Cognitive Impairment" (MCI) which is characterized by a less severe (but abnormal) level of cognitive impairment and a high-risk for developing dementia. Even in the absence of a diagnosable disorder of cognition (e.g., AD and MCI), the perception of increased forgetfulness and declining mental function is a clear source of apprehension in the elderly. This is a valid concern given that even a modest impairment of cognitive function is likely to be associated with significant disability in a rapidly evolving, technology-based society. Unfortunately, the currently available therapies designed to improve cognition (i.e., for AD and other forms of dementia) are limited by modest efficacy and adverse side effects, and their effects on cognitive function are not sustained over time. Accordingly, it is incumbent on the scientific community to develop safer and more effective therapies that improve and/or sustain cognitive function in the elderly allowing them to remain mentally active and productive for as long as possible. As diagnostic criteria for memory disorders evolve, the demand for pro-cognitive therapeutic agents is likely to surpass AD and dementia to include MCI and potentially even less severe forms of memory decline. The purpose of this review is to provide an overview of the contemporary therapeutic targets and preclinical pharmacologic approaches (with representative drug examples) designed to enhance memory function.
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Affiliation(s)
- Alvin V Terry
- Department of Pharmacology and Toxicology and Small Animal Behavior Core, Medical College of Georgia, Augusta, GA 30912, USA.
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