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Chisholm TS, Hunter CA. A closer look at amyloid ligands, and what they tell us about protein aggregates. Chem Soc Rev 2024; 53:1354-1374. [PMID: 38116736 DOI: 10.1039/d3cs00518f] [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: 12/21/2023]
Abstract
The accumulation of amyloid fibrils is characteristic of neurodegenerative diseases such as Alzheimer's disease (AD) and Parkinson's disease. Detecting these fibrils with fluorescent or radiolabelled ligands is one strategy for diagnosing and better understanding these diseases. A vast number of amyloid-binding ligands have been reported in the literature as a result. To obtain a better understanding of how amyloid ligands bind, we have compiled a database of 3457 experimental dissociation constants for 2076 unique amyloid-binding ligands. These ligands target Aβ, tau, or αSyn fibrils, as well as relevant biological samples including AD brain homogenates. From this database significant variation in the reported dissociation constants of ligands was found, possibly due to differences in the morphology of the fibrils being studied. Ligands were also found to bind to Aβ(1-40) and Aβ(1-42) fibrils with similar affinities, whereas a greater difference was found for binding to Aβ and tau or αSyn fibrils. Next, the binding of ligands to fibrils was shown to be largely limited by the hydrophobic effect. Some Aβ ligands do not fit into this hydrophobicity-limited model, suggesting that polar interactions can play an important role when binding to this target. Finally several binding site models were outlined for amyloid fibrils that describe what ligands target what binding sites. These models provide a foundation for interpreting and designing site-specific binding assays.
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Affiliation(s)
- Timothy S Chisholm
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1 EW, UK.
| | - Christopher A Hunter
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1 EW, UK.
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2
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Nikiforova A, Sedov I. Molecular Design of Magnetic Resonance Imaging Agents Binding to Amyloid Deposits. Int J Mol Sci 2023; 24:11152. [PMID: 37446329 DOI: 10.3390/ijms241311152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
Abstract
The ability to detect and monitor amyloid deposition in the brain using non-invasive imaging techniques provides valuable insights into the early diagnosis and progression of Alzheimer's disease and helps to evaluate the efficacy of potential treatments. Magnetic resonance imaging (MRI) is a widely available technique offering high-spatial-resolution imaging. It can be used to visualize amyloid deposits with the help of amyloid-binding diagnostic agents injected into the body. In recent years, a number of amyloid-targeted MRI probes have been developed, but none of them has entered clinical practice. We review the advances in the field and deduce the requirements for the molecular structure and properties of a diagnostic probe candidate. These requirements make up the base for the rational design of MRI-active small molecules targeting amyloid deposits. Particular attention is paid to the novel cryo-EM structures of the fibril aggregates and their complexes, with known binders offering the possibility to use computational structure-based design methods. With continued research and development, MRI probes may revolutionize the diagnosis and treatment of neurodegenerative diseases, ultimately improving the lives of millions of people worldwide.
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Affiliation(s)
- Alena Nikiforova
- Chemical Institute, Kazan Federal University, Kremlevskaya 18, 420008 Kazan, Russia
| | - Igor Sedov
- Chemical Institute, Kazan Federal University, Kremlevskaya 18, 420008 Kazan, Russia
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3
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Hou SS, Yang J, Lee JH, Kwon Y, Calvo-Rodriguez M, Bao K, Ahn S, Kashiwagi S, Kumar ATN, Bacskai BJ, Choi HS. Near-infrared fluorescence lifetime imaging of amyloid-β aggregates and tau fibrils through the intact skull of mice. Nat Biomed Eng 2023; 7:270-280. [PMID: 36747008 PMCID: PMC10040441 DOI: 10.1038/s41551-023-01003-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 01/08/2023] [Indexed: 02/08/2023]
Abstract
Non-invasive methods for the in vivo detection of hallmarks of Alzheimer's disease can facilitate the study of the progression of the disease in mouse models and may enable its earlier diagnosis in humans. Here we show that the zwitterionic heptamethine fluorophore ZW800-1C, which has peak excitation and emission wavelengths in the near-infrared optical window, binds in vivo and at high contrast to amyloid-β deposits and to neurofibrillary tangles, and allows for the microscopic imaging of amyloid-β and tau aggregates through the intact skull of mice. In transgenic mouse models of Alzheimer's disease, we compare the performance of ZW800-1C with that of the two spectrally similar heptamethine fluorophores ZW800-1A and indocyanine green, and show that ZW800-1C undergoes a longer fluorescence-lifetime shift when bound to amyloid-β and tau aggregates than when circulating in blood vessels. ZW800-1C may prove advantageous for tracking the proteinic aggregates in rodent models of amyloid-β and tau pathologies.
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Affiliation(s)
- Steven S Hou
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Joyce Yang
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Jeong Heon Lee
- Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Yeseo Kwon
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Maria Calvo-Rodriguez
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Kai Bao
- Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Sung Ahn
- Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Satoshi Kashiwagi
- Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Anand T N Kumar
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Brian J Bacskai
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
| | - Hak Soo Choi
- Gordon Center for Medical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
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4
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Mochizuki H. Low threshold amplified spontaneous emission from multicolor-tunable E,E-1,4-bis(2-trifluoromethylstyryl)benzene crystals. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroyuki Mochizuki
- Nanomaterials research institute, national institute of advanced industrial science and technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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5
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Yeo SK, Shepelytskyi Y, Grynko V, Albert MS. Molecular Imaging of Fluorinated Probes for Tau Protein and Amyloid-β Detection. Molecules 2020; 25:molecules25153413. [PMID: 32731418 PMCID: PMC7435578 DOI: 10.3390/molecules25153413] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 07/24/2020] [Accepted: 07/24/2020] [Indexed: 12/16/2022] Open
Abstract
Alzheimer’s disease (AD) is the most common form of dementia and results in progressive neurodegeneration. The incidence rate of AD is increasing, creating a major public health issue. AD is characterized by neurofibrillary tangles (NFTs) composed of hyperphosphorylated tau protein and senile plaques composed of amyloid-β (Aβ). Currently, a definitive diagnosis of AD is accomplished post-mortem. Thus, the use of molecular probes that are able to selectively bind to NFTs or Aβ can be valuable tools for the accurate and early diagnosis of AD. The aim of this review is to summarize and highlight fluorinated molecular probes that can be used for molecular imaging to detect either NFTs or Aβ. Specifically, fluorinated molecular probes used in conjunction with 19F MRI, PET, and fluorescence imaging will be explored.
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Affiliation(s)
- Sarah K. Yeo
- Biology Department, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;
| | - Yurii Shepelytskyi
- Chemistry and Materials Science Program, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (Y.S.); (V.G.)
- Thunder Bay Regional Health Research Institute, Thunder Bay, ON P7B 6V4, Canada
| | - Vira Grynko
- Chemistry and Materials Science Program, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (Y.S.); (V.G.)
- Thunder Bay Regional Health Research Institute, Thunder Bay, ON P7B 6V4, Canada
| | - Mitchell S. Albert
- Thunder Bay Regional Health Research Institute, Thunder Bay, ON P7B 6V4, Canada
- Chemistry Department, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Northern Ontario School of Medicine, Thunder Bay, ON P7B 5E1, Canada
- Correspondence: ; Tel.: +1-807-355-9191
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6
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Zhang J, Konsmo A, Sandberg A, Wu X, Nyström S, Obermüller U, Wegenast-Braun BM, Konradsson P, Lindgren M, Hammarström P. Phenolic Bis-styrylbenzo[c]-1,2,5-thiadiazoles as Probes for Fluorescence Microscopy Mapping of Aβ Plaque Heterogeneity. J Med Chem 2019; 62:2038-2048. [DOI: 10.1021/acs.jmedchem.8b01681] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jun Zhang
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Audun Konsmo
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Alexander Sandberg
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Xiongyu Wu
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Sofie Nyström
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Ulrike Obermüller
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany
- DZNE−German Center for Neurodegenerative Diseases, 72076 Tübingen, Germany
| | - Bettina M. Wegenast-Braun
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany
- DZNE−German Center for Neurodegenerative Diseases, 72076 Tübingen, Germany
| | - Peter Konradsson
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Mikael Lindgren
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Per Hammarström
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
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7
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Gao W, Li Z, Xu Q, Li Y. First synthesis of novel 2,4-bis(( E)-styryl)quinoline-3-carboxylate derivatives and their antitumor activity. RSC Adv 2018; 8:38844-38849. [PMID: 35558278 PMCID: PMC9090603 DOI: 10.1039/c8ra08023b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 11/12/2018] [Indexed: 11/21/2022] Open
Abstract
A simple and flexible synthesis of a new series of 2,4-bis((E)-styryl)quinoline-3-carboxylates (3a-t) has been achieved for the first time in good yields via successive Arbuzov/Horner-Wadsworth-Emmons (HWE) reaction in one-pot using the newly-synthesized ethyl 4-(bromomethyl)-2-(chloromethyl)quinoline-3-carboxylate as the substrate. Our synthetic protocol is as attractive and powerful as it is simple, tolerates a wide range of substituents, and does not involve the use of expensive reagents or catalysts. These title compounds belong to a new class of quinoline derivatives and their antitumor activity was assessed on human cancer cell lines (A549, HT29 and T24). The MTT assay showed compounds 3h, 3k and 3t had significant inhibitory activity with IC50 values of 1.53, 1.38 and 2.36 μM against A549 and 1.50, 0.77 and 0.97 μM against HT29, respectively, much better than the reference cisplatin.
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Affiliation(s)
- Wentao Gao
- Institute of Superfine Chemicals, Bohai University Jinzhou 121000 P. R. China
| | - Zhiyuan Li
- Institute of Superfine Chemicals, Bohai University Jinzhou 121000 P. R. China
| | - Qiqi Xu
- Institute of Superfine Chemicals, Bohai University Jinzhou 121000 P. R. China
| | - Yang Li
- Institute of Superfine Chemicals, Bohai University Jinzhou 121000 P. R. China
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8
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A Bifunctional Anti-Amyloid Blocks Oxidative Stress and the Accumulation of Intraneuronal Amyloid-Beta. Molecules 2018; 23:molecules23082010. [PMID: 30103547 PMCID: PMC6222334 DOI: 10.3390/molecules23082010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/04/2018] [Accepted: 08/08/2018] [Indexed: 12/30/2022] Open
Abstract
There is growing recognition regarding the role of intracellular amyloid beta (Aβ) in the Alzheimer’s disease process, which has been linked with aberrant signaling and the disruption of protein degradation mechanisms. Most notably, intraneuronal Aβ likely underlies the oxidative stress and mitochondrial dysfunction that have been identified as key elements of disease progression. In this study, we employed fluorescence imaging to explore the ability of a bifunctional small molecule to reduce aggregates of intracellular Aβ and attenuate oxidative stress. Structurally, this small molecule is comprised of a nitroxide spin label linked to an amyloidophilic fluorene and is known as spin-labeled fluorene (SLF). The effect of the SLF on intracellular Aβ accumulation and oxidative stress was measured in MC65 cells, a human neuronal cell line with inducible expression of the amyloid precursor protein and in the N2a neuronal cell line treated with exogenous Aβ. Super-resolution microscopy imaging showed SLF decreases the accumulation of intracellular Aβ. Confocal microscopy imaging of MC65 cells treated with a reactive oxygen species (ROS)-sensitive dye demonstrated SLF significantly reduces the intracellular Aβ-induced ROS signal. In order to determine the contributions of the separate SLF moieties to these protective activities, experiments were also carried out on cells with nitroxides lacking the Aβ targeting domain or fluorene derivatives lacking the nitroxide functionality. The findings support a synergistic effect of SLF in counteracting both the conformational toxicity of both endogenous and exogenous Aβ, its promotion of ROS, and Aβ metabolism. Furthermore, these studies demonstrate an intimate link between ROS production and Aβ oligomer formation.
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9
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Andhare NH, Thopate Y, Shamsuzzama, Kumar L, Sharma T, Siddiqi M, Sinha AK, Nazir A. A facile tandem double-dehydrative-double-Heck olefination strategy for pot-economic synthesis of ( E )-distyrylbenzenes as multi-target-directed ligands against Alzheimer's disease employing C. elegans model. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Saima, Kumar L, Lavekar AG, Sharma T, Shamsuzzama, Equbal D, Siddiqi MI, Sinha AK, Nazir A. Chemo‐Biocatalytic Oxidative Condensation of Natural Arylpropene with 2‐Aminobenzothiazole into Schiff‐Bases as Potent Anti‐Amyloid Agents: Studies Employing Transgenic
C. elegans. ChemistrySelect 2018. [DOI: 10.1002/slct.201800243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Saima
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
- Academy of Scientific and Innovative Research New Delhi India
| | - Lalit Kumar
- Toxicology divisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Aditya G. Lavekar
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
| | - Tanuj Sharma
- Molecular and Structural Biology DivisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Shamsuzzama
- Toxicology divisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Danish Equbal
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
| | - Mohammad Imran Siddiqi
- Molecular and Structural Biology DivisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Arun K. Sinha
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
- Academy of Scientific and Innovative Research New Delhi India
| | - Aamir Nazir
- Toxicology divisionCSIR-Central Drug Research Institute Lucknow, U.P. India
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Abstract
Variably protease-sensitive prionopathy (VPSPr), originally identified in 2008, was further characterized and renamed in 2010. Thirty-seven cases of VPSPr have been reported to date, consistent with estimated prevalence of 0.7-1.7% of all sporadic prion diseases. The lack of gene mutations establishes VPSPr as a sporadic form of human prion diseases, along with sporadic Creutzfeldt-Jakob disease (sCJD) and sporadic fatal insomnia. Like sCJD, VPSPr affects patients harboring any of the three genotypes, MM, MV, and VV at the prion protein (PrP) gene polymorphic codon 129, with VPSPr VV accounting for 65% of all VPSPr cases. Distinguishing clinical features include a median 2-year duration and presentation with psychiatric signs, speech/language impairment, or cognitive decline. Neuropathology comprises moderate spongiform degeneration, PrP amyloid miniplaques, and a target-like or plaque-like PrP deposition. The abnormal PrP associated with VPSPr typically forms an electrophoretic profile of five to seven bands (according to the antibody) presenting variable protease resistance depending on the 129 genotype. The familial prion disease associated with the V180I PrP gene mutation which harbors an abnormal PrP with similar electrophoretic profile might serve as a model for VPSPr. Transmission to animals has definitively established VPSPr as a prion disease. Because of its recent identification, rarity, and the elusiveness of its abnormal PrP, VPSPr remains largely understudied.
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Affiliation(s)
- Silvio Notari
- Department of Pathology, Case Western Reserve University, Cleveland, OH, United States
| | - Brian S Appleby
- Department of Pathology, Case Western Reserve University, Cleveland, OH, United States; National Prion Disease Pathology Surveillance Center, Case Western Reserve University, Cleveland, OH, United States; Department of Neurology, Case Western Reserve University, Cleveland, OH, United States; Department of Psychiatry, Case Western Reserve University, Cleveland, OH, United States
| | - Pierluigi Gambetti
- Department of Pathology, Case Western Reserve University, Cleveland, OH, United States.
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Mochizuki H. Effect of Trifluoromethyl Group Position in Bis-styrylbenzenes on Their Characteristics. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Nabuurs RJ, Kapoerchan VV, Metaxas A, Hafith S, de Backer M, Welling MM, Jiskoot W, van den Nieuwendijk AM, Windhorst AD, Overkleeft HS, van Buchem MA, Overhand M, van der Weerd L. Bis-pyridylethenyl benzene as novel backbone for amyloid-β binding compounds. Bioorg Med Chem 2016; 24:6139-6148. [PMID: 27838168 DOI: 10.1016/j.bmc.2016.05.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 04/28/2016] [Accepted: 05/14/2016] [Indexed: 11/16/2022]
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14
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Neuroimaging in Alzheimer's disease: preclinical challenges toward clinical efficacy. Transl Res 2016; 175:37-53. [PMID: 27033146 DOI: 10.1016/j.trsl.2016.03.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/05/2016] [Accepted: 03/06/2016] [Indexed: 12/21/2022]
Abstract
The scope of this review focuses on recent applications in preclinical and clinical magnetic resonance imaging (MRI) toward accomplishing the goals of early detection and responses to therapy in animal models of Alzheimer's disease (AD). Driven by the outstanding efforts of the Alzheimer's Disease Neuroimaging Initiative (ADNI), a truly invaluable resource, the initial use of MRI in AD imaging has been to assess changes in brain anatomy, specifically assessing brain shrinkage and regional changes in white matter tractography using diffusion tensor imaging. However, advances in MRI have led to multiple efforts toward imaging amyloid beta plaques first without and then with the use of MRI contrast agents. These technological advancements have met with limited success and are not yet appropriate for the clinic. Recent developments in molecular imaging inclusive of high-power liposomal-based MRI contrast agents as well as fluorine 19 ((19)F) MRI and manganese enhanced MRI have begun to propel promising advances toward not only plaque imaging but also using MRI to detect perturbations in subcellular processes occurring within the neuron. This review concludes with a discussion about the necessity for the development of novel preclinical models of AD that better recapitulate human AD for the imaging to truly be meaningful and for substantive progress to be made toward understanding and effectively treating AD. Furthermore, the continued support of outstanding programs such as ADNI as well as the development of novel molecular imaging agents and MRI fast scanning sequences will also be requisite to effectively translate preclinical findings to the clinic.
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Heo CH, Sarkar AR, Baik SH, Jung TS, Kim JJ, Kang H, Mook-Jung I, Kim HM. A quadrupolar two-photon fluorescent probe for in vivo imaging of amyloid-β plaques. Chem Sci 2016; 7:4600-4606. [PMID: 30155107 PMCID: PMC6016450 DOI: 10.1039/c6sc00355a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/07/2016] [Indexed: 01/22/2023] Open
Abstract
A quadrupolar two-photon fluorescent probe for in vivo imaging of amyloid-β plaques is reported.
The formation of beta amyloid (Aβ) plaques in specific brain regions is one of the early pathological hallmarks of Alzheimer's disease (AD). To enable the early detection of AD and related applications, a method for real-time, clear 3D visualization of Aβ plaques in vivo is highly desirable. Two-photon microscopy (TPM) which utilizes two near-infrared photons is an attractive tool for such applications. However, this technique needs a sensitive and photostable two-photon (TP) probe possessing bright TP exited fluorescence to impart high signal-to-noise (S/N) visualization of Aβ plaques. Herein, we report a quadrupolar TP fluorescent probe (QAD1) having large TP action cross section (Φδmax = 420 GM) and its application for in vivo TPM imaging of Aβ plaques. This probe, designed with a centrosymmetric D–A–D motif with a cyclic conjugating bridge and solubilizing unit, displays bright TP excited fluorescence, appreciable water solubility, robust photostability, and high sensitivity and selectivity for Aβ plaques. Using the real-time TPM imaging of transgenic 5XFAD mice after intravenous injection of QAD1, we show that this probe readily enters the blood brain barrier and provides high S/N ratio images of individual Aβ plaques in vivo. We also used QAD1 in dual-color TPM imaging for 3D visualization of Aβ plaques along with blood vessels and cerebral amyloid angiopathy (CAA) inside living mouse brains. These findings demonstrate that this probe will be useful in biomedical applications including early diagnosis and treatments of AD.
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Affiliation(s)
- Cheol Ho Heo
- Department of Chemistry , Department of Energy Systems Research , Ajou University , Suwon 443-749 , Korea .
| | - Avik Ranjan Sarkar
- Department of Chemistry , Department of Energy Systems Research , Ajou University , Suwon 443-749 , Korea .
| | - Sung Hoon Baik
- Department of Biochemistry , Biomedical Sciences College of Medicine , Seoul National University , Seoul , 110-799 , Korea .
| | - Tae Sung Jung
- Department of Chemistry , Department of Energy Systems Research , Ajou University , Suwon 443-749 , Korea .
| | - Jeong Jin Kim
- Department of Chemistry , Department of Energy Systems Research , Ajou University , Suwon 443-749 , Korea .
| | - Hyuk Kang
- Department of Chemistry , Department of Energy Systems Research , Ajou University , Suwon 443-749 , Korea .
| | - Inhee Mook-Jung
- Department of Biochemistry , Biomedical Sciences College of Medicine , Seoul National University , Seoul , 110-799 , Korea .
| | - Hwan Myung Kim
- Department of Chemistry , Department of Energy Systems Research , Ajou University , Suwon 443-749 , Korea .
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16
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Sharma N, Mohanakrishnan D, Shard A, Sharma A, Sinha AK, Sahal D. Hydroxylated di- and tri-styrylbenzenes, a new class of antiplasmodial agents: discovery and mechanism of action. RSC Adv 2016. [DOI: 10.1039/c6ra06059e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The first systematic evaluation of the antiplasmodial activity of the hydroxystilbene family of natural products and di/tristyrylbenzenes is described.
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Affiliation(s)
- Naina Sharma
- Natural Plant Products Division
- CSIR-Institute of Himalaya Bioresource Technology
- Palampur
- India
- Department of Chemistry
| | - Dinesh Mohanakrishnan
- Malaria Drug Discovery Group
- International Centre for Genetic Engineering and Biotechnology
- New Delhi 110067
- India
| | - Amit Shard
- Natural Plant Products Division
- CSIR-Institute of Himalaya Bioresource Technology
- Palampur
- India
| | - Abhishek Sharma
- Natural Plant Products Division
- CSIR-Institute of Himalaya Bioresource Technology
- Palampur
- India
- Department of Chemistry
| | - Arun K. Sinha
- Natural Plant Products Division
- CSIR-Institute of Himalaya Bioresource Technology
- Palampur
- India
| | - Dinkar Sahal
- Malaria Drug Discovery Group
- International Centre for Genetic Engineering and Biotechnology
- New Delhi 110067
- India
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17
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Ji K, Wu H, Chen J, Shen J, Wang X, Wu H, Liu C. A selective chromofluorogenic chemodosimeter for fluoride ions based on distyrylbenzenes derivatives containing dual Si-O groups. LUMINESCENCE 2015; 31:924-8. [DOI: 10.1002/bio.3048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 09/08/2015] [Accepted: 09/17/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Kai Ji
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
| | - Haocheng Wu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
| | - Jinju Chen
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
| | - Jiajie Shen
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
| | - Xinyu Wang
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
| | - Hongwei Wu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
| | - Chuanxiang Liu
- School of Chemical and Environmental Engineering; Shanghai Institute of Technology; 201418 Shanghai People's Republic of China
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18
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Cheng Y, Zhu B, Deng Y, Zhang Z. In Vivo Detection of Cerebral Amyloid Fibrils with Smart Dicynomethylene-4H-Pyran-Based Fluorescence Probe. Anal Chem 2015; 87:4781-7. [PMID: 25875134 DOI: 10.1021/acs.analchem.5b00017] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yan Cheng
- Key Laboratory
of Drug Targeting
and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Biyue Zhu
- Key Laboratory
of Drug Targeting
and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yue Deng
- Key Laboratory
of Drug Targeting
and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhirong Zhang
- Key Laboratory
of Drug Targeting
and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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Tong H, Lou K, Wang W. Near-infrared fluorescent probes for imaging of amyloid plaques in Alzheimer׳s disease. Acta Pharm Sin B 2015; 5:25-33. [PMID: 26579421 PMCID: PMC4629210 DOI: 10.1016/j.apsb.2014.12.006] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 12/08/2014] [Accepted: 12/11/2014] [Indexed: 12/25/2022] Open
Abstract
One of the early pathological hallmarks of Alzheimer׳s disease (AD) is the deposition of amyloid-β (Aβ) plaques in the brain. There has been a tremendous interest in the development of Aβ plaques imaging probes for early diagnosis of AD in the past decades. Optical imaging, particularly near-infrared fluorescence (NIRF) imaging, has emerged as a safe, low cost, real-time, and widely available technique, providing an attractive approach for in vivo detection of Aβ plaques among many different imaging techniques. In this review, we provide a brief overview of the state-of-the-art development of NIRF Aβ probes and their in vitro and in vivo applications with special focus on design strategies and optical, binding, and brain-kinetic properties.
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Key Words
- AD, Alzheimer’s disease
- APP, amyloid peptide precursor
- Ach, acetylcholine
- Alzheimer׳s disease
- Amyloid-β plagues
- Aβ, amyloid-β
- BAP, BODIPY-based Ab imaging probe
- BBB, blood-brain barrier
- Blood-brain barrier
- Cy, cyanine dyes
- Fluorescence probe
- ICG, indocyanine green dyes
- MRI, magnetic resonance imaging
- NIR, near-infrared
- NIRF, near-infrared fluorescence
- Near-infrared fluorescence
- Optical imaging
- PET, positron emission tomography
- ROS, reactive oxygen species
- SPECT, single photon emission computed tomography
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20
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Aldawsari FS, Elshenawy OH, El Gendy MAM, Aguayo-Ortiz R, Baksh S, El-Kadi AOS, Velázquez-Martínez CA. Design and synthesis of resveratrol–salicylate hybrid derivatives as CYP1A1 inhibitors. J Enzyme Inhib Med Chem 2014; 30:884-95. [DOI: 10.3109/14756366.2014.979347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Fahad S. Aldawsari
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada,
| | - Osama H. Elshenawy
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada,
| | - Mohamed A. M. El Gendy
- Experimental Oncology Unit, Department of Oncology, University of Alberta, Edmonton, Alberta, Canada,
- Department of Pharmacognosy, Pharmaceutical Sciences Division, Natural Research Centre, Dokki, Giza, Egypt,
| | - Rodrigo Aguayo-Ortiz
- Facultad de Química, Departamento de Farmacia, Universidad Nacional Autónoma de México, México,
| | - Shairaz Baksh
- Department of Pediatrics, Oncology and Biochemistry, University of Alberta, Edmonton, Alberta, Canada, and
- Alberta Inflammatory Bowel Disease Consortium, Alberta, Canada
| | - Ayman O. S. El-Kadi
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada,
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21
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Nakazono M, Obayashi K, Sasamoto K, Tomiyoshi K, Suenaga G, Ando Y. Novel styrylbenzene derivatives for detecting amyloid deposits. Clin Chim Acta 2014; 436:27-34. [PMID: 24815035 DOI: 10.1016/j.cca.2014.04.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 04/08/2014] [Accepted: 04/28/2014] [Indexed: 11/25/2022]
Abstract
BACKGROUND Various styrylbenzene compounds were synthesized and evaluated as mainly Aβ amyloid sensors. These compounds, however, cannot be used for detecting amyloid deposition in peripheral nerves because of the inherent sensitivity of the compounds. These compounds often generate false positives especially in the basement membrane of blood vessels in histochemical studies. To overcome these problems, we must first synthesize other styryl compounds for detecting amyloid fibrils in tissues. METHODS A wide variety of symmetrical and unsymmetrical styrylbenzene derivatives were synthesized and then these compounds were used to detect amyloid fibrils in autopsy and biopsy samples from patients with various systemic and localized forms of amyloidosis such as familial amyloidotic polyneuropathy (FAP), senile systemic amyloidosis (SSA), amyloid A (AA) amyloidosis, localized AL amyloidosis, and Alzheimer's disease. RESULTS 1-Methoxy-2,5-bis-styrylbenzene and 2-(2-(2-fluoroethoxy)ethoxy)ethoxy)-2,5-bis-styrylbenzene (EEEFSB) detected amyloid fibrils in both in vitro and in vivo histopathological studies. 1-Methoxy-2,5-bis-styrylbenzene also showed a high strength of fluorescence with amyloid deposition in peripheral nerves in a patient with FAP. CONCLUSIONS 1-Methoxy-2,5-bis-styrylbenzene and EEEFSB may prove a useful tool for diagnosing amyloidosis, not only in a histochemical study but also in whole body amyloid positron emission tomography (PET) imaging.
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Affiliation(s)
- Manabu Nakazono
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Konen Obayashi
- Diagnostic Unit for Amyloidosis, Department of Laboratory Medicine, Kumamoto University Hospital, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Kazumi Sasamoto
- Dojindo Laboratories, 2025-5 Tabaru, Mashiki-machi, Kumamoto 861-2202, Japan
| | - Katsumi Tomiyoshi
- Department of Clinical Radiation Technology, Graduate School of Health Sciences, Kumamoto University, 4-24-1 Kuhonji, Kumamoto 862-0976, Japan
| | - Genki Suenaga
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
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22
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Quadrupolar D-π-A-π-D chromophores with central tetrafluorobenzene acceptor and two peripheral N,N-dimethylamino and methoxy donors. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.02.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Nabuurs RJA, Kapoerchan VV, Metaxas A, de Jongh S, de Backer M, Welling MM, Jiskoot W, Windhorst AD, Overkleeft HS, van Buchem MA, Overhand M, van der Weerd L. Polyfluorinated bis-styrylbenzenes as amyloid-β plaque binding ligands. Bioorg Med Chem 2014; 22:2469-81. [PMID: 24657049 DOI: 10.1016/j.bmc.2014.02.054] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 02/25/2014] [Accepted: 02/28/2014] [Indexed: 10/25/2022]
Abstract
Detection of cerebral β-amyloid (Aβ) by targeted contrast agents remains of great interest to aid the in vivo diagnosis of Alzheimer's disease (AD). Bis-styrylbenzenes have been previously reported as potential Aβ imaging agents. To further explore their potency as (19)F MRI contrast agents we synthetized several novel fluorinated bis-styrylbenzenes and studied their fluorescent properties and amyloid-β binding characteristics. The compounds showed a high affinity for Aβ plaques on murine and human brain sections. Interestingly, competitive binding experiments demonstrated that they bound to a different binding site than chrysamine G. Despite their high logP values, many bis-styrylbenzenes were able to enter the brain and label murine amyloid in vivo. Unfortunately initial post-mortem (19)F NMR studies showed that these compounds as yet do not warrant further MRI studies due to the reduction of the (19)F signal in the environment of the brain.
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Affiliation(s)
- Rob J A Nabuurs
- Department of Radiology CS2, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands.
| | - Varsha V Kapoerchan
- Department of Bioorganic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | | | - Sanne de Jongh
- Department of Radiology CS2, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands
| | - Maaike de Backer
- Department of Radiology CS2, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands
| | - Mick M Welling
- Department of Radiology CS2, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands
| | - Wim Jiskoot
- Division of Drug Delivery Technology, Leiden Academic Center for Drug Research, Leiden University, Netherlands
| | | | - Hermen S Overkleeft
- Department of Bioorganic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Mark A van Buchem
- Department of Radiology CS2, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands
| | - Mark Overhand
- Department of Bioorganic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Louise van der Weerd
- Department of Radiology CS2, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands; Department of Human Genetics, Leiden University Medical Center, Leiden, Netherlands
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24
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Laughlin BJ, Duniho TL, El Homsi SJ, Levy BE, Deligonul N, Gaffen JR, Protasiewicz JD, Tennyson AG, Smith RC. Comparison of 1,4-distyrylfluorene and 1,4-distyrylbenzene analogues: synthesis, structure, electrochemistry and photophysics. Org Biomol Chem 2013; 11:5425-34. [PMID: 23863862 DOI: 10.1039/c3ob40580j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of nine 1,4-distyrylfluorene derivatives (2) functionalized with substituents of variable electrondonating or -accepting capabilities was synthesised. The photophysical properties of the molecules were investigated, including UV/vis absorption, photoluminescence emission, and fluorescence quantum yields. Photophysical properties of chromophores 2 were found to exhibit significant solvatochromic effects, especially in the Stokes shift and photoluminescence maxima. The electrochemical properties of series 2 were also assessed by cyclic voltammetry and differential pulse voltammetry. Results of photophysical and electrochemical analyses were further supported by DFT calculations (B3LYP/6-31G*) and single crystal X-ray diffraction on select molecules. The contributions of intermolecular π-stacking and hydrogen bonding to crystal packing are discussed. A series of nine 1,4-distyrylphenylene derivatives (3) were also synthesised and similarly characterized for comparison to photophysical and solvatochromic effects observed in series 2. Properties of similarly-substituted molecules in series 2 and 3 were compared to one another in order to assess the influence of the 1,4-fluorenylene unit.
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Affiliation(s)
- Brynna J Laughlin
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
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25
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Cavazzini M, Quici S, Orlandi S, Sissa C, Terenziani F, Painelli A. Intimately bound coumarin and bis(alkylaminostyryl)benzene fragments: synthesis and energy transfer. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Li C, Zhao X, Gao X, Wang Q, Li Z. Foldamer-Derived Preorganized Bi- and Tri-zinc Porphyrin Tweezers for a Pentafluorobenzene-bearing Pyridine Guest: The Binding Pattern Study. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Mukkamala R, Senthilmurugan A, Aidhen IS. Convenient Access to Acyl-Substituted Bis(styrylbenzenes) Based on Building Blocks Using Julia Olefination and Weinreb Amide Chemistry. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201607] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Vithanarachchi SM, Allen MJ. A multimodal, β-amyloid-targeted contrast agent. Chem Commun (Camb) 2013; 49:4148-50. [DOI: 10.1039/c2cc36583a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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29
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Ha YM, Lee HJ, Park D, Jeong HO, Park JY, Park YJ, Lee KJ, Lee JY, Moon HR, Chung HY. Molecular Docking Studies of (1 E,3 E,5 E)-1,6-Bis(substituted phenyl)hexa-1,3,5-triene and 1,4-Bis(substituted trans-styryl)benzene Analogs as Novel Tyrosinase Inhibitors. Biol Pharm Bull 2013; 36:55-65. [DOI: 10.1248/bpb.b12-00605] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Young Mi Ha
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University
| | - Hye Jin Lee
- Laboratory of Medicinal Chemistry, College of Pharmacy, Pusan National University
| | - Daeui Park
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University
| | - Hyoung Oh Jeong
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University
| | - Ji Young Park
- Laboratory of Medicinal Chemistry, College of Pharmacy, Pusan National University
| | - Yun Jung Park
- Laboratory of Medicinal Chemistry, College of Pharmacy, Pusan National University
| | - Kyung Jin Lee
- Laboratory of Medicinal Chemistry, College of Pharmacy, Pusan National University
| | - Ji Yeon Lee
- Laboratory of Medicinal Chemistry, College of Pharmacy, Pusan National University
| | - Hyung Ryong Moon
- Laboratory of Medicinal Chemistry, College of Pharmacy, Pusan National University
| | - Hae Young Chung
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University
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30
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Gu J, Anumala UR, Lo Monte F, Kramer T, Heyny von Haußen R, Hölzer J, Goetschy-Meyer V, Mall G, Hilger I, Czech C, Schmidt B. 2-Styrylindolium based fluorescent probes visualize neurofibrillary tangles in Alzheimer’s disease. Bioorg Med Chem Lett 2012; 22:7667-71. [DOI: 10.1016/j.bmcl.2012.09.109] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 09/27/2012] [Accepted: 09/29/2012] [Indexed: 10/27/2022]
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31
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Shard A, Sharma N, Bharti R, Dadhwal S, Kumar R, Sinha AK. Tandem Heck/Decarboxylation/Heck Strategy: Protecting-Group-Free Synthesis of Symmetric and Unsymmetric Hydroxylated Stilbenoids. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206346] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Shard A, Sharma N, Bharti R, Dadhwal S, Kumar R, Sinha AK. Tandem Heck/Decarboxylation/Heck Strategy: Protecting-Group-Free Synthesis of Symmetric and Unsymmetric Hydroxylated Stilbenoids. Angew Chem Int Ed Engl 2012; 51:12250-3. [DOI: 10.1002/anie.201206346] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 09/09/2012] [Indexed: 01/08/2023]
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33
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Peng H, Thurecht KJ, Blakey I, Taran E, Whittaker AK. Effect of Solvent Quality on the Solution Properties of Assemblies of Partially Fluorinated Amphiphilic Diblock Copolymers. Macromolecules 2012. [DOI: 10.1021/ma3019188] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui Peng
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Kristofer J. Thurecht
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Idriss Blakey
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Elena Taran
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
| | - Andrew K. Whittaker
- Australian
Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, and §Australian National
Fabrication Facility Queensland Node, The University of Queensland, St. Lucia 4072, Australia
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Bolognesi ML, Melchiorre C, Van der Schyf CJ, Youdim M. Discovery of Multi-Target Agents for Neurological Diseases via Ligand Design. DESIGNING MULTI-TARGET DRUGS 2012. [DOI: 10.1039/9781849734912-00290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The incidence of neurological disorders in the developed world is rising in concert with an increase in human life expectancy, due in large part to better nutrition and health care. Even as drug discovery efforts are refocused on these disorders, there has been a dearth in the introduction of new disease-modifying therapies to prevent or delay their onset, or reverse their progression. Mounting evidence points to complex and heterogeneous etiopathologies that underlie these diseases. Therefore, it is unlikely that disorders in this class will be mitigated by any single drug that acts exclusively on a single pathway or target. The rational design of novel drug entities with the ability to simultaneously address multiple drug targets of a complex pathophysiology has recently emerged as a new paradigm in drug discovery. Similarly to the concept of multi-target agents within the psychopharmacology field, ligand design has gained an increasing prominence within the medicinal chemistry community. In this chapter we discuss several examples of select chemical scaffolds (polyamines, alkylxanthines, and propargyl carbamates) wherein these concepts were applied to develop novel drug candidates for Alzheimer's disease and Parkinson's disease.
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Affiliation(s)
| | | | | | - Moussa Youdim
- Technion Israel Institute of Technology Haifa Israel
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35
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Mustazza C, Sbriccoli M, Borioni A, Ferretti R, Del Giudice MR. New fluorinated 1,4-bis-(arylaminomethyl)- and 1,4-bis-(arylaminomethylene)benzenes as fluorescent probes for amyloid plaques in Alzheimer's disease and transmissible spongiform encephalopathies. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md00254j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Vainer AY, Dyumaev KM, Kovalenko AM, Davidovich MZ, Zelikson KI, Pinchuk EM. New polyphenols of the fluorene family and positive-tone photoresists based on them for 22-nm nanolithography. DOKLADY CHEMISTRY 2012. [DOI: 10.1134/s0012500812010041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Vainer AY, Dyumaev KM, Kovalenko AM, Davidovich MZ, Pinchuk EM, Sorokin VY. 2,7,12-tri(4-trifluorovinyloxyphenyl)-5,5,10,10,15,15-hexa(4-trifluorovinyloxybenzyl)truxene for 22-nm nanolithography: Synthesis and thermo- and photochemical transformations. DOKLADY PHYSICAL CHEMISTRY 2011. [DOI: 10.1134/s0012501611100034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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Sharma N, Sharma A, Shard A, Kumar R, Saima, Sinha AK. Pd-Catalyzed Orthogonal Knoevenagel/Perkin Condensation-Decarboxylation-Heck/Suzuki Sequences: Tandem Transformations of Benzaldehydes into Hydroxy-Functionalized Antidiabetic Stilbene-Cinnamoyl Hybrids and Asymmetric Distyrylbenzenes. Chemistry 2011; 17:10350-6. [DOI: 10.1002/chem.201101174] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Indexed: 11/09/2022]
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39
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Fluorinated molecules in the diagnosis and treatment of neurodegenerative diseases. Future Med Chem 2011; 1:821-33. [PMID: 21426082 DOI: 10.4155/fmc.09.85] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The use of fluorinated molecules as drugs and imaging agents for CNS disorders has been studied extensively over the years. Incorporating a fluorine atom into the structure of a drug changes its physiochemical properties and can thereby lead to much more desirable pharmacokinetic and pharmacodynamic properties. This change can help to facilitate blood-brain barrier permeability, which is a critical matter for drugs intended for CNS activities. Fluorine incorporation into structures of drugs for the treatment of neurodegenerative diseases has been an attractive field for drug discovery. Such incorporation can greatly influence the physicochemical properties, metabolic stability and receptor binding affinity of the resulting molecule. Some studies have shown that when a proton was substituted with fluorine, the binding or inhibitory potency was greatly increased. The fluorine-18 isotope, (18)F, is utilized in detection and diagnosis of neurodegenerative diseases, whereas (19)F compounds are used in the treatment of these diseases and in MRI. (18)F is widely used in PET imaging because it offers the advantage of a longer half-life compared with other radionuclides. It is used for imaging various receptors and transporters that have been linked to neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, Huntington's disease and multiple system atrophy. Fluorine plays an important role in the diagnosis and treatment of many CNS diseases, including neurodegenerative disorders. The use of fluorine in the diagnosis and treatment of neurodegenerative diseases, such as Alzheimer's disease and Parkinson's disease, will be discussed in this review.
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Vainer AY, Dyumaev KM, Mareeva SA, Alekseev VD, Bruskina MB, Glagolev AA. Aromatic polyethers with 2,6-bis(4-azidotetrafluorobenzylidene)cyclohexanone side fragments and styryl groups in the backbone. DOKLADY CHEMISTRY 2011. [DOI: 10.1134/s0012500811050041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Hochdörffer K, März-Berberich J, Nagel-Steger L, Epple M, Meyer-Zaika W, Horn AHC, Sticht H, Sinha S, Bitan G, Schrader T. Rational design of β-sheet ligands against Aβ42-induced toxicity. J Am Chem Soc 2011; 133:4348-58. [PMID: 21381732 DOI: 10.1021/ja107675n] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A β-sheet-binding scaffold was equipped with long-range chemical groups for tertiary contacts toward specific regions of the Alzheimer's Aβ fibril. The new constructs contain a trimeric aminopyrazole carboxylic acid, elongated with a C-terminal binding site, whose influence on the aggregation behavior of the Aβ(42) peptide was studied. MD simulations after trimer docking to the anchor point (F19/F20) suggest distinct groups of complex structures each of which featured additional specific interactions with characteristic Aβ regions. Members of each group also displayed a characteristic pattern in their antiaggregational behavior toward Aβ. Specifically, remote lipophilic moieties such as a dodecyl, cyclohexyl, or LPFFD fragment can form dispersive interactions with the nonpolar cluster of amino acids between I31 and V36. They were shown to strongly reduce Thioflavine T (ThT) fluorescence and protect cells from Aβ lesions (MTT viability assays). Surprisingly, very thick fibrils and a high β-sheet content were detected in transmission electron microscopy (TEM) and CD spectroscopic experiments. On the other hand, distant single or multiple lysines which interact with the ladder of stacked E22 residues found in Aβ fibrils completely dissolve existing β-sheets (ThT, CD) and lead to unstructured, nontoxic material (TEM, MTT). Finally, the triethyleneglycol spacer between heterocyclic β-sheet ligand and appendix was found to play an active role in destabilizing the turn of the U-shaped protofilament. Fluorescence correlation spectroscopy (FCS) and sedimentation velocity analysis (SVA) provided experimental evidence for some smaller benign aggregates of very thin, delicate structure (TEM, MTT). A detailed investigation by dynamic light scattering (DLS) and other methods proved that none of the new ligands acts as a colloid. The evolving picture for the disaggregation mechanism by these new hybrid ligands implies transformation of well-ordered fibrils into less structured aggregates with a high molecular weight. In the few cases where fibrillar components remain, these display a significantly altered morphology and have lost their acute cellular toxicity.
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Affiliation(s)
- Katrin Hochdörffer
- Universität Duisburg-Essen, Fachbereich Chemie, Universitätstrasse 5, 45117 Essen, Germany
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Amatsubo T, Yanagisawa D, Morikawa S, Taguchi H, Tooyama I. Amyloid imaging using high-field magnetic resonance. Magn Reson Med Sci 2011; 9:95-9. [PMID: 20885081 DOI: 10.2463/mrms.9.95] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The formation of senile plaques followed by deposition of amyloid β peptides (Aβ) are the earliest pathological changes of Alzheimer's disease (AD); thus, detection of the plaques remains the most important early diagnostic indicator of AD. Amyloid imaging is a noninvasive technique for visualizing senile plaques in the brains of patients with Alzheimer's using positron emission tomography (PET) or magnetic resonance (MR) imaging. Several types of probes have been developed for PET, but few ligands have been developed specifically for MR imaging detection of amyloid plaques. This review presents recent advances in amyloid imaging using MR imaging and includes our studies.
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Affiliation(s)
- Tomone Amatsubo
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu, Japan
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Knight JC, Edwards PG, Paisey SJ. Fluorinated contrast agents for magnetic resonance imaging; a review of recent developments. RSC Adv 2011. [DOI: 10.1039/c1ra00627d] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Bolognesi ML, Bartolini M, Mancini F, Chiriano G, Ceccarini L, Rosini M, Milelli A, Tumiatti V, Andrisano V, Melchiorre C. Bis(7)-tacrine derivatives as multitarget-directed ligands: Focus on anticholinesterase and antiamyloid activities. ChemMedChem 2010; 5:1215-20. [PMID: 20486153 DOI: 10.1002/cmdc.201000086] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Flaherty DP, Kiyota T, Dong Y, Ikezu T, Vennerstrom JL. Phenolic bis-styrylbenzenes as β-amyloid binding ligands and free radical scavengers. J Med Chem 2010; 53:7992-9. [PMID: 21038854 DOI: 10.1021/jm1006929] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Starting from bisphenolic bis-styrylbenzene DF-9 (4), β-amyloid (Aβ) binding affinity and specificity for phenolic bis-styrylbenzenes, monostyrylbenzenes, and alkyne controls were determined by fluorescence titration with β-amyloid peptide Aβ(1-40) and a fluorescence assay using APP/PS1 transgenic mouse brain sections. Bis-styrylbenzene SAR is derived largely from work on symmetrical compounds. This study is the first to describe Aβ binding data for bis-styrylbenzenes unsymmetrical in the outer rings. With one exception, binding affinity and specificity were decreased by adding and/or changing the substitution pattern of phenol functional groups, changing the orientation about the central phenyl ring, replacing the alkene with alkyne bonds, or eliminating the central phenyl ring. The only compound with an Aβ binding affinity and specificity comparable to 4 was its 3-hydroxy regioisomer 8. Like 4, 8 crossed the blood-brain barrier and bound to Aβ plaques in vivo. By use of a DPPH assay, phenol functional groups with para orientations seem to be a necessary, but insufficient, criterion for good free radical scavenging properties in these compounds.
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Affiliation(s)
- Daniel P Flaherty
- University of Nebraska Medical Center, College of Pharmacy, 986025 Nebraska Medical Center, Omaha, Nebraska 68198, USA
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Geurink PP, Liu N, Spaans MP, Downey SL, van den Nieuwendijk AMCH, van der Marel GA, Kisselev AF, Florea BI, Overkleeft HS. Incorporation of fluorinated phenylalanine generates highly specific inhibitor of proteasome's chymotrypsin-like sites. J Med Chem 2010; 53:2319-23. [PMID: 20131905 DOI: 10.1021/jm9015685] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Proteasomal processing is conducted by three individual catalytic subunits, namely beta1, beta2, and beta5. Subunit-specific inhibitors are useful tools in dissecting the role of these individual subunits and are leads toward the development of antitumor agents. We here report that the presence of fluorinated phenylalanine derivatives in peptide based proteasome inhibitors has a profound effect on inhibitor potency and selectivity. Specifically, compound 4a emerges as one of the most beta5 specific inhibitors known to date.
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Affiliation(s)
- Paul P Geurink
- Leiden Institute of Chemistry and Netherlands Proteomics Centre, Gorlaeus Laboratories, Einsteinweg 55, 2333 CC Leiden, The Netherlands
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Härtig W, Kacza J, Paulke BR, Grosche J, Bauer U, Hoffmann A, Elsinghorst PW, Gütschow M. In vivolabelling of hippocampal β-amyloid in triple-transgenic mice with a fluorescent acetylcholinesterase inhibitor released from nanoparticles. Eur J Neurosci 2010; 31:99-109. [DOI: 10.1111/j.1460-9568.2009.07038.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Sharma A, Sharma N, Kumar R, Shard A, Sinha AK. Direct olefination of benzaldehydes into hydroxy functionalized oligo (p-phenylenevinylene)s via Pd-catalyzed heterodomino Knoevenagel-decarboxylation-Heck sequence and its application for fluoride sensing π-conjugated units. Chem Commun (Camb) 2010; 46:3283-5. [DOI: 10.1039/c001980a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tokuraku K, Marquardt M, Ikezu T. Real-time imaging and quantification of amyloid-beta peptide aggregates by novel quantum-dot nanoprobes. PLoS One 2009; 4:e8492. [PMID: 20041162 PMCID: PMC2794548 DOI: 10.1371/journal.pone.0008492] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Accepted: 12/01/2009] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Protein aggregation plays a major role in the pathogenesis of neurodegenerative disorders, such as Alzheimer's disease. However, direct real-time imaging of protein aggregation, including oligomerization and fibrillization, has never been achieved. Here we demonstrate the preparation of fluorescent semiconductor nanocrystal (quantum dot; QD)-labeled amyloid-beta peptide (QDAbeta) and its advanced applications. METHODOLOGY/PRINCIPAL FINDINGS The QDAbeta construct retained Abeta oligomer-forming ability, and the sizes of these oligomers could be estimated from the relative fluorescence intensities of the imaged spots. Both QDAbeta coaggregation with intact Abeta42 and insertion into fibrils were detected by fluorescence microscopy. The coaggregation process was observed by real-time 3D imaging using slit-scanning confocal microscopy, which showed a typical sigmoid curve with 1.5 h in the lag-time and 12 h until saturation. Inhibition of coaggregation using an anti-Abeta antibody can be observed as 3D images on a microscopic scale. Microglia ingested monomeric QDAbeta more significantly than oligomeric QDAbeta, and the ingested QDAbeta was mainly accumulated in the lysosome. CONCLUSIONS/SIGNIFICANCE These data demonstrate that QDAbeta is a novel nanoprobe for studying Abeta oligomerization and fibrillization in multiple modalities and may be applicable for high-throughput drug screening systems.
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Affiliation(s)
- Kiyotaka Tokuraku
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Department of Chemical Science and Engineering, Miyakonojo National College of Technology, Miyakonojo, Japan
| | - Meg Marquardt
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Tsuneya Ikezu
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * E-mail:
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Flaherty DP, Dong Y, Vennerstrom JL. A one-pot synthesis of unsymmetrical bis-styrylbenzenes. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.08.083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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