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Weber TM, Özdüzenciler P, Tamgüney G, Pietruszka J. Utilization of a Branched Late-Stage Clickable Biotinylated Chassis on the Example of a Pittsburgh B Analogue. Org Lett 2024; 26:6771-6775. [PMID: 39051841 DOI: 10.1021/acs.orglett.4c02527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Biotinylation is probably the most frequent and practically useful modification of molecules to facilitate selective and highly affine binding to (strept)avidin for immobilization, enrichment, and purification for further (bio)chemical or (bio)physical investigations. We present a protecting-group-free synthesis of a branched biotin bis-azide that enables dual-payload late-stage functionalization with arbitrary alkynes via click chemistry. Utility of the chassis is briefly showcased on the example of a valuable Pittsburgh B analogue, which binds pathological protein aggregates, commonly found in neurodegenerative diseases.
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Affiliation(s)
- T Moritz Weber
- Mathematisch-Naturwissenschaftliche Fakultät, Institut für Bioorganische Chemie, Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, 52428 Jülich, Germany
| | - Pelin Özdüzenciler
- Institut für Biologische Informationsprozesse 7 (IBI-7: Strukturbiochemie), Forschungszentrum Jülich, 52428 Jülich, Germany
- Mathematisch-Naturwissenschaftliche Fakultät, Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Gültekin Tamgüney
- Institut für Biologische Informationsprozesse 7 (IBI-7: Strukturbiochemie), Forschungszentrum Jülich, 52428 Jülich, Germany
- Mathematisch-Naturwissenschaftliche Fakultät, Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Jörg Pietruszka
- Mathematisch-Naturwissenschaftliche Fakultät, Institut für Bioorganische Chemie, Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, 52428 Jülich, Germany
- Institut für Bio- und Geowissenschaften 1 (IBG-1: Biotechnologie), Forschungszentrum Jülich, 52428 Jülich, Germany
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2
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Zhang ZY, Li ZJ, Tang YH, Xu L, Zhang DT, Qin TY, Wang YL. Recent Research Progress in Fluorescent Probes for Detection of Amyloid-β In Vivo. BIOSENSORS 2023; 13:990. [PMID: 37998165 PMCID: PMC10669267 DOI: 10.3390/bios13110990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease. Due to its complex pathological mechanism, its etiology is not yet clear. As one of the main pathological markers of AD, amyloid-β (Aβ) plays an important role in the development of AD. The deposition of Aβ is not only related to the degeneration of neurons, but also can activate a series of pathological events, including the activation of astrocytes and microglia, the breakdown of the blood-brain barrier, and the change in microcirculation, which is the main cause of brain lesions and death in AD patients. Therefore, the development of efficient and reliable Aβ-specific probes is crucial for the early diagnosis and treatment of AD. This paper focuses on reviewing the application of small-molecule fluorescent probes in Aβ imaging in vivo in recent years. These probes efficiently map the presence of Aβ in vivo, providing a pathway for the early diagnosis of AD and providing enlightenment for the design of Aβ-specific probes in the future.
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Affiliation(s)
- Zhen-Yu Zhang
- State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, China
| | - Ze-Jun Li
- State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, China
| | - Ying-Hao Tang
- State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, China
| | - Liang Xu
- State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, China
| | - De-Teng Zhang
- Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Qingdao 266071, China
| | - Tian-Yi Qin
- State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, China
| | - Ya-Long Wang
- State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, China
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
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3
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Wang B, Shi J, Guo N, Shao L, Zhai W, Jiang L, Zhao F, Wang J, Wang J, Du L, Pang X, Yan L. Rational design synthesis and evaluation of a novel near-infrared fluorescent probe for selective imaging of amyloid-β aggregates in Alzheimer's disease. Anal Chim Acta 2023; 1281:341900. [PMID: 38783740 DOI: 10.1016/j.aca.2023.341900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/19/2023] [Accepted: 10/10/2023] [Indexed: 05/25/2024]
Abstract
Alzheimer's disease (AD) is a degenerative neurological disorder that remains incurable to date, seriously affecting the quality of life and health of those affected. One of the key neuropathological hallmarks of AD is the formation of amyloid-β (Aβ) plaques. Near-infrared (NIR) probes that possess a large Stokes shift show great potential for imaging of Aβ plaques in vivo and in vitro. Herein, we proposed a rational strategy for design and synthesis of a series of NIR fluorescent probes that incorporate a tricarbonitrile group as a strong electron-withdrawing group (EWG) to enable NIR emission and large Stokes shift for optimal imaging of Aβ plaques. The probe TCM-UM exhibited remarkable in vitro performance, including strong NIR emission (λem = 670 nm), large Stokes shift (120-245 nm), and its affinity for Aβ42 aggregates (Kd = 43.78 ± 4.09 nM) was superior to the commercially available probe Thioflavin T (ThT, Kd = 896.04 ± 33.43 nM). Further, TCM-UM was selected for imaging Aβ plaques in brain tissue slices and APP/PS1 transgenic (AD) mice, the results indicated that TCM-UM had an excellent ability to penetrate the blood-brain barrier (BBB) compared with ThT, and it could effectively distinguish wild-type (Wt) mice and APP/PS1 transgenic (AD) mice.
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Affiliation(s)
- Bingxin Wang
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Junzhuo Shi
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Ning Guo
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Lulian Shao
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Weibin Zhai
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Lei Jiang
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Fenqin Zhao
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Jianhong Wang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China
| | - Junfeng Wang
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 125 Nushua St, Boston, MA, 02149, USA
| | - Lida Du
- Institute of Molecular Medicine & Innovative Pharmaceutics, Qingdao University, Qingdao, 266071, China.
| | - Xiaobin Pang
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China.
| | - Lin Yan
- State Key Laboratory of Antiviral Drugs, School of Pharmacy, Henan University, N. Jinming Ave., Kaifeng, Henan, 475004, China.
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4
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Zhuang ZM, Zhou Z, Chen X, Xu XR, Wang HX, Pan J. A Flexible Bivalent Approach to Comprehensively Improve the Performances of Stilbazolium Dyes as Amyloid-β Fluorescent Probes. ACS APPLIED MATERIALS & INTERFACES 2023; 15:44742-44751. [PMID: 37721982 DOI: 10.1021/acsami.3c09034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
Exploring new ways to reconstruct the structure and function of inappropriate organic fluorophores for improving amyloid-β (Aβ) fluorescent imaging performance is desired for precise detection and early diagnosis of Alzheimer's disease (AD). With stilbazolium dyes as examples, here, we present a multipronged approach to comprehensively improved the Aβ fluorescent imaging performance through a flexible bivalent method, where a flexible carbon chain was introduced to link two monomers to form a homodimer. Our results reveal a mechanism wherein the flexible linker creates a well-defined probe with specific orientations and distinct photophysical properties. Applying this approach in combination with theoretical simulation, the homodimers exhibited a comprehensive improvement of the Aβ fluorescent imaging performance of the dye monomers, including better photostability and higher signal-to-noise (S/N) ratio, higher "off-on" near-infrared fluorescence (NIRF) response sensitivity, higher specificity and affinity to Aβ deposits, and more reasonable lipophilicity for blood-brain barrier (BBB) penetrability. The results demonstrate that flexible homodimers offer a multipronged approach to obtaining high-performance NIRF imaging reagents for the detection of Aβ deposits both in vitro and in vivo.
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Affiliation(s)
- Zi-Min Zhuang
- Key Laboratory for the Synthesis and Application of Organic Functional Molecules (MOE), College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Zhe Zhou
- Neurology Department, Lanzhou University First Hospital, Lanzhou 730000, P. R. China
| | - Xian Chen
- College of Health Science and Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Xin-Ru Xu
- Key Laboratory for the Synthesis and Application of Organic Functional Molecules (MOE), College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Hang-Xing Wang
- Key Laboratory for the Synthesis and Application of Organic Functional Molecules (MOE), College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Jie Pan
- Key Laboratory for the Synthesis and Application of Organic Functional Molecules (MOE), College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China
- College of Health Science and Engineering, Hubei University, Wuhan 430062, P. R. China
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5
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Gharai PK, Khan J, Mallesh R, Garg S, Saha A, Ghosh S, Ghosh S. Vanillin Benzothiazole Derivative Reduces Cellular Reactive Oxygen Species and Detects Amyloid Fibrillar Aggregates in Alzheimer's Disease Brain. ACS Chem Neurosci 2023; 14:773-786. [PMID: 36728363 DOI: 10.1021/acschemneuro.2c00771] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The misfolding of amyloid beta (Aβ) peptides into Aβ fibrillary aggregates is a major hallmark of Alzheimer's disease (AD), which responsible for the excess production of hydrogen peroxide (H2O2), a prominent reactive oxygen species (ROS) from the molecular oxygen (O2) by the reduction of the Aβ-Cu(I) complex. The excessive production of H2O2 causes oxidative stress and inflammation in the AD brain. Here, we have designed and developed a dual functionalized molecule VBD by using π-conjugation (C═C) in the backbone structure. In the presence of H2O2, the VBD can turn into fluorescent probe VBD-1 by cleaving of the selective boronate ester group. The fluorescent probe VBD-1 can undergo intramolecular charge transfer transition (ICT) by a π-conjugative system, and as a result, its emission increases from the yellow (532 nm) to red (590 nm) region. The fluorescence intensity of VBD-1 increases by 3.5-fold upon binding with Aβ fibrillary aggregates with a high affinity (Kd = 143 ± 12 nM). Finally, the VBD reduces the cellular toxic H2O2 as proven by the CCA assay and DCFDA assay and the binding affinity of VBD-1 was confirmed by using in vitro histological staining in 8- and 18-month-old triple transgenic AD (3xTg-AD) mice brain slices.
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Affiliation(s)
- Prabir Kumar Gharai
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, WB, India.,Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India
| | - Juhee Khan
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, WB, India.,Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India
| | - Rathnam Mallesh
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, WB, India.,Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India.,National Institute of Pharmaceutical Education and Research, Kolkata, Chunilal Bhawan 168, Maniktala Main Road, Kolkata 700054, India
| | - Shubham Garg
- Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India
| | - Abhijit Saha
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Subhajit Ghosh
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, WB, India
| | - Surajit Ghosh
- Organic and Medicinal Chemistry and Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, WB, India.,Department of Bioscience & Bioengineering, Indian Institute of Technology, Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India.,National Institute of Pharmaceutical Education and Research, Kolkata, Chunilal Bhawan 168, Maniktala Main Road, Kolkata 700054, India
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6
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Alzheimer's Disease-Biochemical and Psychological Background for Diagnosis and Treatment. Int J Mol Sci 2023; 24:ijms24021059. [PMID: 36674580 PMCID: PMC9866942 DOI: 10.3390/ijms24021059] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 01/09/2023] Open
Abstract
There is a paucity of empirical research on the use of non-pharmacological interventions to both treat and curb the spread of Alzheimer's disease (AD) across the globe. This paper examines the biochemical and clinical outlook and the social implications of the condition in relation to psychological aspects that may indicate a direction for further interventions. There is a scarcity of research on the effectiveness of using various psychological aspects of AD, a disease characterized by a process of transition from health and independence to a dependent state with a progressive loss of memory and functional skills. The paper investigates the biochemical and psychological aspects of AD and their significance for improving quality of life for patients with this disease. Psychological interventions based on, among other factors, biochemical studies, are conducted to improve the emotional wellbeing of AD patients and may assist in slowing down the progression of the disease. To date, however, no effective methods of AD treatment have been established.
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Wang Y, Mei D, Zhang X, Qu DH, Mei J. Visualizing Aβ deposits in live young AD model mice with a simple red/near-infrared-fluorescent AIEgen. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1113-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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8
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Sanna E, Rodrigues M, Fagan SG, Chisholm TS, Kulenkampff K, Klenerman D, Spillantini MG, Aigbirhio FI, Hunter CA. Mapping the binding site topology of amyloid protein aggregates using multivalent ligands. Chem Sci 2021; 12:8892-8899. [PMID: 34257890 PMCID: PMC8246084 DOI: 10.1039/d1sc01263k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/19/2021] [Indexed: 11/21/2022] Open
Abstract
A key process in the development of neurodegenerative diseases such as Alzheimer's and Parkinson's diseases is the aggregation of proteins to produce fibrillary aggregates with a cross β-sheet structure, amyloid. The development of reagents that can bind these aggregates with high affinity and selectivity has potential for early disease diagnosis. By linking two benzothiazole aniline (BTA) head groups with different length polyethylene glycol (PEG) spacers, fluorescent probes that bind amyloid fibrils with low nanomolar affinity have been obtained. Dissociation constants measured for interaction with Aβ, α-synuclein and tau fibrils show that the length of the linker determines binding affinity and selectivity. These compounds were successfully used to image α-synuclein aggregates in vitro and in the post-mortem brain tissue of patients with Parkinson's disease. The results demonstrate that multivalent ligands offer a powerful approach to obtain high affinity, selective reagents to bind the fibrillary aggregates that form in neurodegenerative disease. Multivalent ligands offer a powerful approach to obtain high affinity reagents to bind the aggregates that form in neurodegenerative disease. Selectivity for different proteins was achieved by using different linkers to connect the head groups.![]()
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Affiliation(s)
- Elena Sanna
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Margarida Rodrigues
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Steven G Fagan
- Department of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge Cambridge CB2 0AH UK
| | - Timothy S Chisholm
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Klara Kulenkampff
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - David Klenerman
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Maria Grazia Spillantini
- Department of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge Cambridge CB2 0AH UK
| | - Franklin I Aigbirhio
- Department of Clinical Neuroscience, Wolfson Brain Imaging Centre, University of Cambridge CB2 0QQ UK
| | - Christopher A Hunter
- Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
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9
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Dorababu A. Critical evaluation of current Alzheimer's drug discovery (2018-19) & futuristic Alzheimer drug model approach. Bioorg Chem 2019; 93:103299. [PMID: 31586701 DOI: 10.1016/j.bioorg.2019.103299] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/14/2019] [Accepted: 09/16/2019] [Indexed: 12/17/2022]
Abstract
Alzheimer's disease (AD), a neurodegenerative disease responsible for death of millions of people worldwide is a progressive clinical disorder which causes neurons to degenerate and ultimately die. It is one of the common causes of dementia wherein a person's incapability to independently think, behave and decline in social skills can be quoted as major symptoms. However the early signs include the simple non-clinical symptoms such as forgetting recent events and conversations. Onset of these symptoms leads to worsened conditions wherein the AD patient suffers severe memory impairment and eventually becomes unable to work out everyday tasks. Even though there is no complete cure for AD, rigorous research has been going on to reduce the progress of AD. Currently, a very few clinical drugs are prevailing for AD treatment. So this is the need of hour to design, develop and discovery of novel anti-AD drugs. The main factors for the cause of AD according to scientific research reveals structural changes in brain proteins such as beta amyloid, tau proteins into plaques and tangles respectively. The abnormal proteins distort the neurons. Despite the high potencies of the synthesized molecules; they could not get on the clinical tests up to human usage. In this review article, the recent research carried out with respect to inhibition of AChE, BuChE, NO, BACE1, MAOs, Aβ, H3R, DAPK, CSF1R, 5-HT4R, PDE, σ1R and GSK-3β is compiled and organized. The summary is focused mainly on cholinesterases, Aβ, BACE1 and MAOs classes of potential inhibitors. The review also covers structure activity relationship of most potent compounds of each class of inhibitors alongside redesign and remodeling of the most significant inhibitors in order to expect cutting edge inhibitory properties towards AD. Alongside the molecular docking studies of the some final compounds are discussed.
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Affiliation(s)
- Atukuri Dorababu
- Department of Studies in Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, Karnataka, India.
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10
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Roscales S, Csákÿ AG. Synthesis of Mono- N-Methyl Aromatic Amines from Nitroso Compounds and Methylboronic Acid. ACS OMEGA 2019; 4:13943-13953. [PMID: 31497712 PMCID: PMC6713987 DOI: 10.1021/acsomega.9b01608] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/12/2019] [Indexed: 05/08/2023]
Abstract
The selective synthesis of mono-N-methyl aromatic amines was achieved by the reaction of aromatic nitroso compounds with methylboronic acid promoted by triethylphosphite under transition metal-free conditions. The target compounds are constructed efficiently without overmethylation, under environmentally benign reaction conditions that do not require bases or reductants and therefore are of interest in pharmaceutical, agricultural, and chemical industries.
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11
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Wreden AB, Fernandes L, Kelley M, Pereira-Neves A, Moreira CS, da Rocha DR, Palhano FL. Selective and Sensitive Pull Down of Amyloid Fibrils Produced in Vitro and in Vivo by the Use of Pentameric-Thiophene-Coupled Resins. ACS Chem Neurosci 2018; 9:2807-2814. [PMID: 29762014 DOI: 10.1021/acschemneuro.8b00222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Protein aggregation is a hallmark of several degenerative diseases, including Alzheimer's disease, Parkinson's disease and familial amyloidosis (Finnish type) (FAF). A method to isolate and detect amyloids is desired for the diagnosis of amyloid diseases. Here, we report the synthesis of pentameric thiophene amyloid ligand (p-FTAA) linked to agarose resin for selective purification of amyloid aggregates produced in vitro and in vivo. Using amyloid fibrils produced in vitro from α-synuclein, gelsolin, and Aβ1-40 and gelsolin amyloid aggregates extracted from tissue homogenates of a mouse model of FAF, we observed that p-FTAA resin was able to pull down amyloid aggregates. The functionalized resin was also able to pull down oligomers produced in vitro from the A30P variant of α-synuclein. The methodology described here can be useful for the diagnosis of amyloidogenic disease and also can be used to purify amyloid fibrils from biological samples, rendering the fibrils available for more accurate structural and biochemical characterization.
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Affiliation(s)
- Anna Beatriz Wreden
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Luiza Fernandes
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Mirian Kelley
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Antonio Pereira-Neves
- Fiocruz Pernambuco, Instituto Aggeu Magalhães, Departamento de Microbiologia, Recife, PE 50740-465, Brazil
| | - Caroline S. Moreira
- Departamento de Química, Instituto de Química Orgânica, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil
| | - David R. da Rocha
- Departamento de Química, Instituto de Química Orgânica, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil
| | - Fernando L. Palhano
- Instituto de Bioquímica Médica Leopoldo de Meis, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
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12
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Salehi N, Mirjalili BBF, Nadri H, Abdolahi Z, Forootanfar H, Samzadeh-Kermani A, Küçükkılınç TT, Ayazgok B, Emami S, Haririan I, Sharifzadeh M, Foroumadi A, Khoobi M. Synthesis and biological evaluation of new N-benzylpyridinium-based benzoheterocycles as potential anti-Alzheimer's agents. Bioorg Chem 2018; 83:559-568. [PMID: 30471578 DOI: 10.1016/j.bioorg.2018.11.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 08/25/2018] [Accepted: 11/10/2018] [Indexed: 01/04/2023]
Abstract
A novel series of benzylpyridinium-based benzoheterocycles (benzimidazole, benzoxazole or benzothiazole) were designed as potent acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) inhibitors. The title compounds 4a-q were conveniently synthesized via condensation reaction of 1,2-phenylenediamine, 2-aminophenol or 2-aminothiophenol with pyridin-4-carbalehyde, followed by N-benzylation using various benzyl halides. The results of in vitro biological assays revealed that most of them, especially 4c and 4g, had potent anticholinesterase activity comparable or more potent than reference drug, donepezil. The kinetic study demonstrated that the representative compound 4c inhibits AChE in competitive manner. According to the ligand-enzyme docking simulation, compound 4c occupied the active site at the vicinity of catalytic triad. The compounds 4c and 4g were found to be inhibitors of Aβ self-aggregation as well as AChE-induced Aβ aggregation. Meanwhile, these compounds could significantly protect PC12 cells against H2O2-induced injury and showed no toxicity against HepG2 cells. As multi-targeted structures, compounds 4c and 4g could be considered as promising candidate for further lead developments to treat Alzheimer's disease.
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Affiliation(s)
- Naeimeh Salehi
- Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran
| | - Bi Bi Fatemeh Mirjalili
- Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran.
| | - Hamid Nadri
- Faculty of Pharmacy, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Zahra Abdolahi
- Faculty of Pharmacy, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Hamid Forootanfar
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | | | | | - Beyza Ayazgok
- Hacettepe University, Faculty of Pharmacy, Department of Biochemistry, Ankara, Turkey
| | - Saeed Emami
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Ismaeil Haririan
- Department of Pharmaceutical Biomaterials, Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Sharifzadeh
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Toxicology and Poisoning Research Centre, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Foroumadi
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Khoobi
- The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran 1417614411, Iran; Departmnt of Pharmaceutical Biomaterials, Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
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