1
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Ruiz-Arias A, Fueyo-González F, Izquierdo-García C, Navarro A, Gutiérrez-Rodríguez M, Herranz R, Burgio C, Reinoso A, Cuerva JM, Orte A, González-Vera JA. Exchangeable Self-Assembled Lanthanide Antennas for PLIM Microscopy. Angew Chem Int Ed Engl 2024; 63:e202314595. [PMID: 37991081 DOI: 10.1002/anie.202314595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/08/2023] [Accepted: 11/22/2023] [Indexed: 11/23/2023]
Abstract
Lanthanides have unique photoluminescence (PL) emission properties, including very long PL lifetimes. This makes them ideal for biological imaging applications, especially using PL lifetime imaging microscopy (PLIM). PLIM is an inherently multidimensional technique with exceptional advantages for quantitative biological imaging. Unfortunately, due to the required prolonged acquisitions times, photobleaching of lanthanide PL emission currently constitutes one of the main drawbacks of PLIM. In this study, we report a small aqueous-soluble, lanthanide antenna, 8-methoxy-2-oxo-1,2,4,5-tetrahydrocyclopenta[de]quinoline-3-phosphonic acid, PAnt, specifically designed to dynamically interact with lanthanide ions, serving as exchangeable dye aimed at mitigating photobleaching in PLIM microscopy in cellulo. Thus, self-assembled lanthanide complexes that may be photobleached during image acquisition are continuously replenished by intact lanthanide antennas from a large reservoir. Remarkably, our self-assembled lanthanide complex clearly demonstrated a significant reduction of PL photobleaching when compared to well-established lanthanide cryptates, used for bioimaging. This concept of exchangeable lanthanide antennas opens new possibilities for quantitative PLIM bioimaging.
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Affiliation(s)
- Alvaro Ruiz-Arias
- Nanoscopy-UGR Laboratory. Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071, Granada, Spain
| | - Francisco Fueyo-González
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
- Current address: Department of Medicine, Translational Transplant Research Center, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, USA
| | | | - Amparo Navarro
- Departamento de Química Física y Analítica, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071, Jaén, Spain
| | - Marta Gutiérrez-Rodríguez
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
- PTI-Global Health CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
| | - Rosario Herranz
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | - Chiara Burgio
- Departamento de Bioquímica y Biología Molecular II, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071, Granada, Spain
| | - Antonio Reinoso
- Departamento de Bioquímica y Biología Molecular II, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071, Granada, Spain
| | - Juan M Cuerva
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva, 18071, Granada, Spain
| | - Angel Orte
- Nanoscopy-UGR Laboratory. Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071, Granada, Spain
| | - Juan A González-Vera
- Nanoscopy-UGR Laboratory. Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071, Granada, Spain
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
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2
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Fueyo-González F, Vilanova G, Ningoo M, Marjanovic N, González-Vera JA, Orte Á, Fribourg M. Small-molecule TIP60 inhibitors enhance regulatory T cell induction through TIP60-P300 acetylation crosstalk. iScience 2023; 26:108491. [PMID: 38094248 PMCID: PMC10716589 DOI: 10.1016/j.isci.2023.108491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 08/12/2023] [Accepted: 11/14/2023] [Indexed: 12/29/2023] Open
Abstract
Foxp3 acetylation is essential to regulatory T (Treg) cell stability and function, but pharmacologically increasing it remains an unmet challenge. Here, we report that small-molecule compounds that inhibit TIP60, an acetyltransferase known to acetylate Foxp3, unexpectedly increase Foxp3 acetylation and Treg induction. Utilizing a dual experimental/computational approach combined with a newly developed FRET-based methodology compatible with flow cytometry to measure Foxp3 acetylation, we unraveled the mechanism of action of these small-molecule compounds in murine and human Treg induction cell cultures. We demonstrate that at low-mid concentrations they activate TIP60 to acetylate P300, a different acetyltransferase, which in turn increases Foxp3 acetylation, thereby enhancing Treg cell induction. These results reveal a potential therapeutic target relevant to autoimmunity and transplant.
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Affiliation(s)
- Francisco Fueyo-González
- Translational Transplant Research Center, Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Immunology Institute Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Guillermo Vilanova
- LaCàN, Universitat Politècnica de Catalunya-BarcelonaTech, 08034 Barcelona Spain
| | - Mehek Ningoo
- Translational Transplant Research Center, Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Immunology Institute Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nada Marjanovic
- Deparment of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Juan A. González-Vera
- Deparment of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Nanoscopy-UGR Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Ángel Orte
- Deparment of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Nanoscopy-UGR Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Miguel Fribourg
- Translational Transplant Research Center, Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Immunology Institute Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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Fernandez A, Kielland N, Makda A, Carragher NO, González-García MC, Espinar-Barranco L, González-Vera JA, Orte A, Lavilla R, Vendrell M. A multicomponent reaction platform towards multimodal near-infrared BODIPY dyes for STED and fluorescence lifetime imaging. RSC Chem Biol 2022; 3:1251-1259. [PMID: 36320886 PMCID: PMC9533399 DOI: 10.1039/d2cb00168c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/25/2022] [Indexed: 11/07/2023] Open
Abstract
We report a platform combining multicomponent reaction synthesis and automated cell-based screening to develop biocompatible NIR-BODIPY fluorophores. From a library of over 60 fluorophores, we optimised compound NIRBD-62c as a multimodal probe with suitable properties for STED super-resolution and fluorescence lifetime imaging. Furthermore, we employed NIRBD-62c for imaging trafficking inside cells and to examine how pharmacological inhibitors can alter the vesicular traffic between intracellular compartments and the plasma membrane.
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Affiliation(s)
- Antonio Fernandez
- Centre for Inflammation Research, The University of Edinburgh Edinburgh UK
- Dpt Organic Chemistry, Faculty of Chemistry, University of Murcia Spain
| | - Nicola Kielland
- Centre for Inflammation Research, The University of Edinburgh Edinburgh UK
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy and Institute of Biomedicine (IBUB), University of Barcelona Spain
| | - Ashraff Makda
- Institute of Genetics and Cancer, The University of Edinburgh Edinburgh UK
| | - Neil O Carragher
- Institute of Genetics and Cancer, The University of Edinburgh Edinburgh UK
| | | | | | - Juan A González-Vera
- Nanoscopy-UGR Laboratory, Facultad de Farmacia, Universidad de Granada Granada Spain
| | - Angel Orte
- Nanoscopy-UGR Laboratory, Facultad de Farmacia, Universidad de Granada Granada Spain
| | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy and Institute of Biomedicine (IBUB), University of Barcelona Spain
| | - Marc Vendrell
- Centre for Inflammation Research, The University of Edinburgh Edinburgh UK
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4
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Fueyo-González F, Espinar-Barranco L, Herranz R, Alkorta I, Crovetto L, Fribourg M, Paredes JM, Orte A, González-Vera JA. Self-Assembled Lanthanide Antenna Glutathione Sensor for the Study of Immune Cells. ACS Sens 2022; 7:322-330. [PMID: 35034437 PMCID: PMC8805117 DOI: 10.1021/acssensors.1c02439] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
![]()
The small molecule
8-methoxy-2-oxo-1,2,4,5-tetrahydrocyclopenta[de]quinoline-3-carboxylic
acid (2b) behaves as a reactive non-fluorescent Michael
acceptor, which after reaction with thiols becomes fluorescent, and
an efficient Eu3+ antenna, after self-assembling with this
cation in water. This behavior makes 2b a highly selective
GSH biosensor, which has demonstrated high potential for studies in
murine and human cells of the immune system (CD4+ T, CD8+ T, and B cells) using flow cytometry. GSH can be monitored
by the fluorescence of the product of addition to 2b (445
nm) or by the luminescence of Eu3+ (592 nm). 2b was able to capture baseline differences in GSH intracellular levels
among murine and human CD4+ T, CD8+ T, and B
cells. We also successfully used 2b to monitor intracellular
changes in GSH associated with the metabolic variations governing
the induction of CD4+ naïve T cells into regulatory
T cells (TREG).
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Affiliation(s)
- Francisco Fueyo-González
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
- Department of Medicine, Translational Transplant Research Center, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Laura Espinar-Barranco
- Nanoscopy Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Rosario Herranz
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Ibon Alkorta
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Luis Crovetto
- Nanoscopy Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Miguel Fribourg
- Department of Medicine, Translational Transplant Research Center, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Jose Manuel Paredes
- Nanoscopy Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Angel Orte
- Nanoscopy Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Juan A. González-Vera
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
- Nanoscopy Laboratory, Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
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5
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Ruiz-Arias Á, Jurado R, Fueyo-González F, Herranz R, Gálvez N, González-Vera JA, Orte A. Selecting FRET pairs for visualizing amyloid aggregation. Results in Chemistry 2022. [DOI: 10.1016/j.rechem.2021.100275] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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6
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Cueto-Díaz EJ, Ebiloma GU, Alfayez IA, Ungogo MA, Lemgruber L, González-García MC, Giron MD, Salto R, Fueyo-González FJ, Shiba T, González-Vera JA, Ruedas Rama MJ, Orte A, de Koning HP, Dardonville C. Synthesis, biological, and photophysical studies of molecular rotor-based fluorescent inhibitors of the trypanosome alternative oxidase. Eur J Med Chem 2021; 220:113470. [PMID: 33940464 DOI: 10.1016/j.ejmech.2021.113470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/26/2021] [Accepted: 04/10/2021] [Indexed: 11/28/2022]
Abstract
We have recently reported on the development and trypanocidal activity of a class of inhibitors of Trypanosome Alternative Oxidase (TAO) that are targeted to the mitochondrial matrix by coupling to lipophilic cations via C14 linkers to enable optimal interaction with the enzyme's active site. This strategy resulted in a much-enhanced anti-parasite effect, which we ascribed to the greater accumulation of the compound at the location of the target protein, i.e. the mitochondrion, but to date this localization has not been formally established. We therefore synthesized a series of fluorescent analogues to visualize accumulation and distribution within the cell. The fluorophore chosen, julolidine, has the remarkable extra feature of being able to function as a viscosity sensor and might thus additionally act as a probe of the cellular glycerol that is expected to be produced when TAO is inhibited. Two series of fluorescent inhibitor conjugates incorporating a cationic julolidine-based viscosity sensor were synthesized and their photophysical and biological properties were studied. These probes display a red emission, with a high signal-to-noise ratio (SNR), using both single- and two-photon excitation. Upon incubation with T. brucei and mammalian cells, the fluorescent inhibitors 1a and 2a were taken up selectively in the mitochondria as shown by live-cell imaging. Efficient partition of 1a in functional isolated (rat liver) mitochondria was estimated to 66 ± 20% of the total. The compounds inhibited recombinant TAO enzyme in the submicromolar (1a, 2c, 2d) to low nanomolar range (2a) and were effective against WT and multidrug-resistant trypanosome strains (B48, AQP1-3 KO) in the submicromolar range. Good selectivity (SI > 29) over mammalian HEK cells was observed. However, no viscosity-related shift could be detected, presumably because the glycerol was produced cytosolically, and released through aquaglyceroporins, whereas the probe was located, virtually exclusively, in the trypanosome's mitochondrion.
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Affiliation(s)
- Eduardo J Cueto-Díaz
- Instituto de Química Médica, IQM-CSIC, Juan de la Cierva 3, E-28006, Madrid, Spain
| | - Godwin U Ebiloma
- Graduate School of Science and Technology, Department of Applied Biology, Kyoto Institute of Technology, Kyoto, 606-8585, Japan; Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom; School of Health and Life Sciences, Teesside University, Middlesbrough, United Kingdom
| | - Ibrahim A Alfayez
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Marzuq A Ungogo
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom; Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
| | - Leandro Lemgruber
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - M Carmen González-García
- Departamento de Fisicoquimica, Facultad de Farmacia, Universidad de Granada, C. U. Cartuja, E-18071, Granada, Spain
| | - Maria D Giron
- Departamento de Bioquimica y Biologia Molecular II. Facultad de Farmacia, Universidad de Granada, C. U. Cartuja, E-18071, Granada, Spain
| | - Rafael Salto
- Departamento de Bioquimica y Biologia Molecular II. Facultad de Farmacia, Universidad de Granada, C. U. Cartuja, E-18071, Granada, Spain
| | | | - Tomoo Shiba
- Graduate School of Science and Technology, Department of Applied Biology, Kyoto Institute of Technology, Kyoto, 606-8585, Japan
| | - Juan A González-Vera
- Departamento de Fisicoquimica, Facultad de Farmacia, Universidad de Granada, C. U. Cartuja, E-18071, Granada, Spain
| | - Maria José Ruedas Rama
- Departamento de Fisicoquimica, Facultad de Farmacia, Universidad de Granada, C. U. Cartuja, E-18071, Granada, Spain
| | - Angel Orte
- Departamento de Fisicoquimica, Facultad de Farmacia, Universidad de Granada, C. U. Cartuja, E-18071, Granada, Spain
| | - Harry P de Koning
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
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7
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Cercós P, Peraza DA, de Benito-Bueno A, Socuéllamos PG, Aziz-Nignan A, Arrechaga-Estévez D, Beato E, Peña-Acevedo E, Albert A, González-Vera JA, Rodríguez Y, Martín-Martínez M, Valenzuela C, Gutiérrez-Rodríguez M. Pharmacological Approaches for the Modulation of the Potassium Channel K V4.x and KChIPs. Int J Mol Sci 2021; 22:ijms22031419. [PMID: 33572566 PMCID: PMC7866805 DOI: 10.3390/ijms22031419] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 01/27/2021] [Accepted: 01/28/2021] [Indexed: 02/06/2023] Open
Abstract
Ion channels are macromolecular complexes present in the plasma membrane and intracellular organelles of cells. Dysfunction of ion channels results in a group of disorders named channelopathies, which represent an extraordinary challenge for study and treatment. In this review, we will focus on voltage-gated potassium channels (KV), specifically on the KV4-family. The activation of these channels generates outward currents operating at subthreshold membrane potentials as recorded from myocardial cells (ITO, transient outward current) and from the somata of hippocampal neurons (ISA). In the heart, KV4 dysfunctions are related to Brugada syndrome, atrial fibrillation, hypertrophy, and heart failure. In hippocampus, KV4.x channelopathies are linked to schizophrenia, epilepsy, and Alzheimer's disease. KV4.x channels need to assemble with other accessory subunits (β) to fully reproduce the ITO and ISA currents. β Subunits affect channel gating and/or the traffic to the plasma membrane, and their dysfunctions may influence channel pharmacology. Among KV4 regulatory subunits, this review aims to analyze the KV4/KChIPs interaction and the effect of small molecule KChIP ligands in the A-type currents generated by the modulation of the KV4/KChIP channel complex. Knowledge gained from structural and functional studies using activators or inhibitors of the potassium current mediated by KV4/KChIPs will better help understand the underlying mechanism involving KV4-mediated-channelopathies, establishing the foundations for drug discovery, and hence their treatments.
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Affiliation(s)
- Pilar Cercós
- Instituto de Química Médica (IQM-CSIC), 28006 Madrid, Spain; (P.C.); (M.M.-M.)
| | - Diego A. Peraza
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBM), CSIC-UAM, 28029 Madrid, Spain; (D.A.P.); (A.d.B.-B.); (P.G.S.)
- Spanish Network for Biomedical Research in Cardiovascular Research (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Angela de Benito-Bueno
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBM), CSIC-UAM, 28029 Madrid, Spain; (D.A.P.); (A.d.B.-B.); (P.G.S.)
- Spanish Network for Biomedical Research in Cardiovascular Research (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Paula G. Socuéllamos
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBM), CSIC-UAM, 28029 Madrid, Spain; (D.A.P.); (A.d.B.-B.); (P.G.S.)
- Spanish Network for Biomedical Research in Cardiovascular Research (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Abdoul Aziz-Nignan
- Department of Natural Sciences, Hostos Community College of CUNY, New York, NY 10451, USA; (A.A.-N.); (D.A.-E.); (E.B.); (E.P.-A.); (Y.R.)
| | - Dariel Arrechaga-Estévez
- Department of Natural Sciences, Hostos Community College of CUNY, New York, NY 10451, USA; (A.A.-N.); (D.A.-E.); (E.B.); (E.P.-A.); (Y.R.)
| | - Escarle Beato
- Department of Natural Sciences, Hostos Community College of CUNY, New York, NY 10451, USA; (A.A.-N.); (D.A.-E.); (E.B.); (E.P.-A.); (Y.R.)
| | - Emilio Peña-Acevedo
- Department of Natural Sciences, Hostos Community College of CUNY, New York, NY 10451, USA; (A.A.-N.); (D.A.-E.); (E.B.); (E.P.-A.); (Y.R.)
| | - Armando Albert
- Instituto de Química Física Rocasolano (IQFR-CSIC), 28006 Madrid, Spain;
| | - Juan A. González-Vera
- Departamento de Físicoquímica, Facultad de Farmacia, Universidad de Granada, 18071 Granada, Spain;
| | - Yoel Rodríguez
- Department of Natural Sciences, Hostos Community College of CUNY, New York, NY 10451, USA; (A.A.-N.); (D.A.-E.); (E.B.); (E.P.-A.); (Y.R.)
| | | | - Carmen Valenzuela
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBM), CSIC-UAM, 28029 Madrid, Spain; (D.A.P.); (A.d.B.-B.); (P.G.S.)
- Spanish Network for Biomedical Research in Cardiovascular Research (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence: ; (C.V.); (M.G.-R.); Tel.: +34-91-585-4493 (C.V.); +34-91-258-7493 (M.-G.R.)
| | - Marta Gutiérrez-Rodríguez
- Instituto de Química Médica (IQM-CSIC), 28006 Madrid, Spain; (P.C.); (M.M.-M.)
- Correspondence: ; (C.V.); (M.G.-R.); Tel.: +34-91-585-4493 (C.V.); +34-91-258-7493 (M.-G.R.)
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8
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Gila-Vilchez C, Mañas-Torres MC, González-Vera JA, Franco-Montalban F, Tamayo JA, Conejero-Lara F, Cuerva JM, Lopez-Lopez MT, Orte A, Álvarez de Cienfuegos L. Insights into the co-assemblies formed by different aromatic short-peptide amphiphiles. Polym Chem 2021. [DOI: 10.1039/d1py01366a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The mechanism of co-assembly of different aromatic dipeptides has been studied using a combination of microscopy and spectroscopy techniques. At an equimolar ratio, the kinetics of the process is favored giving rise to alternate copolymers.
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Affiliation(s)
- Cristina Gila-Vilchez
- Universidad de Granada, Departamento de Física Aplicada, Facultad de Ciencias, 18071 Granada, Spain
| | - Mari C. Mañas-Torres
- Universidad de Granada, Dpto de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente (UEQ), 18071-Granada, Spain
| | - Juan A. González-Vera
- Universidad de Granada, Nanoscopy-UGR Laboratory. Dpto de FisicoQuímica, Facultad de Farmacia, UEQ, 18072-Granada, Spain
| | - Francisco Franco-Montalban
- Universidad de Granada, Dpto de Química Farmacéutica y Orgánica, Facultad de Farmacia, 18072-Granada, Spain
| | - Juan A. Tamayo
- Universidad de Granada, Dpto de Química Farmacéutica y Orgánica, Facultad de Farmacia, 18072-Granada, Spain
| | | | - Juan Manuel Cuerva
- Universidad de Granada, Dpto de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente (UEQ), 18071-Granada, Spain
| | - Modesto T. Lopez-Lopez
- Universidad de Granada, Departamento de Física Aplicada, Facultad de Ciencias, 18071 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Angel Orte
- Universidad de Granada, Nanoscopy-UGR Laboratory. Dpto de FisicoQuímica, Facultad de Farmacia, UEQ, 18072-Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Universidad de Granada, Dpto de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente (UEQ), 18071-Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
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9
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Peyressatre M, Arama DP, Laure A, González-Vera JA, Pellerano M, Masurier N, Lisowski V, Morris MC. Identification of Quinazolinone Analogs Targeting CDK5 Kinase Activity and Glioblastoma Cell Proliferation. Front Chem 2020; 8:691. [PMID: 32974274 PMCID: PMC7466635 DOI: 10.3389/fchem.2020.00691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 07/03/2020] [Indexed: 11/15/2022] Open
Abstract
CDK5/p25 kinase plays a major role in neuronal functions, and is hyperactivated in several human cancers including glioblastoma and neurodegenerative pathologies such as Alzheimer's and Parkinson's. CDK5 therefore constitutes an attractive pharmacological target. Since the successful discovery and development of Roscovitine, several ATP-competitive inhibitors of CDK5 and peptide inhibitors of CDK5/p25 interface have been developed. However, these compounds suffer limitations associated with their mechanism of action and nature, thereby calling for alternative targeting strategies. To date, few allosteric inhibitors have been developed for successful targeting of protein kinases. Indeed, although this latter class of inhibitors are believed to be more selective than compounds targeting the active site, they have proven extremely difficult to identify in high throughput screens. By implementing a fluorescent biosensor that discriminates against ATP-pocket binding compounds to screen for allosteric inhibitors that target conformational activation of CDK5, we have identified a novel family of quinazolinones. Characterization of these hits and several of their derivatives revealed their inhibitory potential toward CDK5 kinase activity in vitro and to inhibit glioblastoma cell proliferation. The quinazolinone derivatives described in this study are the first small molecules reported to target CDK5 at a site other than the ATP pocket, thereby constituting attractive leads for glioblastoma therapeutics and providing therapeutic perspectives for neurodegenerative diseases. These compounds offer alternatives to conventional ATP-competitive inhibitors or peptides targeting CDK5/p25 interface with the potential of bypassing their limitations.
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Affiliation(s)
- Marion Peyressatre
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - Dominique Patomo Arama
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - Arthur Laure
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - Juan A González-Vera
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - Morgan Pellerano
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - Nicolas Masurier
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - Vincent Lisowski
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
| | - May C Morris
- Institut des Biomolecules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, UFR des Sciences Pharmaceutiques et Biologiques, Montpellier, France
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10
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Fueyo-González F, González-Vera JA, Alkorta I, Infantes L, Jimeno ML, Aranda P, Acuña-Castroviejo D, Ruiz-Arias A, Orte A, Herranz R. Environment-Sensitive Probes for Illuminating Amyloid Aggregation In Vitro and in Zebrafish. ACS Sens 2020; 5:2792-2799. [PMID: 32551591 DOI: 10.1021/acssensors.0c00587] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The aberrant aggregation of certain peptides and proteins, forming extracellular plaques of fibrillar material, is one of the hallmarks of amyloid diseases, such as Alzheimer's and Parkinson's. Herein, we have designed a new family of solvatochromic dyes based on the 9-amino-quinolimide moiety capable of reporting during the early stages of amyloid fibrillization. We have rationally improved the photophysical properties of quinolimides by placing diverse amino groups at the 9-position of the quinolimide core, leading to higher solvatochromic and fluorogenic character and higher lifetime dependence on the hydrophobicity of the environment, which represent excellent properties for the sensitive detection of prefibrillar aggregates. Among the different probes prepared, the 9-azetidinyl-quinolimide derivative showed striking performance in the following β-amyloid peptide (Aβ) aggregation in solution in real time and identifying the formation of different types of early oligomers of Aβ, the most important species linked to cytotoxicity, using novel, multidimensional fluorescence microscopy, with one- or two-photon excitation. Interestingly, the new dye allowed the visualization of proteinaceous inclusion bodies in a zebrafish model with neuronal damage induced by the neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine. Our results support the potential of the novel fluorophores as powerful tools to follow amyloid aggregation using fluorescence microscopy in vivo, revealing heterogeneous populations of different types of aggregates and, more broadly, to study protein interactions.
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Affiliation(s)
| | - Juan A. González-Vera
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Ibon Alkorta
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Lourdes Infantes
- Instituto de Química Física Rocasolano, IQFR-CSIC, Serrano 119, 28006 Madrid, Spain
| | - Maria Luisa Jimeno
- Centro de Química Orgánica Lora Tamayo (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Paula Aranda
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, 18016 Granada, Spain
| | - Dario Acuña-Castroviejo
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, 18016 Granada, Spain
- CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Hospital Universitario San Cecilio, 18016 Granada, Spain
| | - Alvaro Ruiz-Arias
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Angel Orte
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain
| | - Rosario Herranz
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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11
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Ruiz-Arias Á, Paredes JM, Di Biase C, Cuerva JM, Giron MD, Salto R, González-Vera JA, Orte A. Seeding and Growth of β-Amyloid Aggregates upon Interaction with Neuronal Cell Membranes. Int J Mol Sci 2020; 21:ijms21145035. [PMID: 32708806 PMCID: PMC7404110 DOI: 10.3390/ijms21145035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/22/2022] Open
Abstract
In recent years, the prevalence of amyloid neurodegenerative diseases such as Alzheimer's disease (AD) has significantly increased in developed countries due to increased life expectancy. This amyloid disease is characterized by the presence of accumulations and deposits of β-amyloid peptide (Aβ) in neuronal tissue, leading to the formation of oligomers, fibers, and plaques. First, oligomeric intermediates that arise during the aggregation process are currently thought to be primarily responsible for cytotoxicity in cells. This work aims to provide further insights into the mechanisms of cytotoxicity by studying the interaction of Aβ aggregates with Neuro-2a (N2a) neuronal cells and the effects caused by this interaction. For this purpose, we have exploited the advantages of advanced, multidimensional fluorescence microscopy techniques to determine whether different types of Aβ are involved in higher rates of cellular toxicity, and we measured the cellular stress caused by such aggregates by using a fluorogenic intracellular biothiol sensor. Stress provoked by the peptide is evident by N2a cells generating high levels of biothiols as a defense mechanism. In our study, we demonstrate that Aβ aggregates act as seeds for aggregate growth upon interacting with the cellular membrane, which results in cell permeability and damage and induces lysis. In parallel, these damaged cells undergo a significant increase in intracellular biothiol levels.
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Affiliation(s)
- Álvaro Ruiz-Arias
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (Á.R.-A.); (J.M.P.); (C.D.B.); (J.A.G.-V.)
| | - Jose M. Paredes
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (Á.R.-A.); (J.M.P.); (C.D.B.); (J.A.G.-V.)
| | - Chiara Di Biase
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (Á.R.-A.); (J.M.P.); (C.D.B.); (J.A.G.-V.)
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029 Urbino, Italy
| | - Juan M. Cuerva
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva, 18071 Granada, Spain;
| | - María D. Giron
- Departamento de Bioquímica y Biología Molecular II, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (M.D.G.); (R.S.)
| | - Rafael Salto
- Departamento de Bioquímica y Biología Molecular II, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (M.D.G.); (R.S.)
| | - Juan A. González-Vera
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (Á.R.-A.); (J.M.P.); (C.D.B.); (J.A.G.-V.)
| | - Angel Orte
- Departamento de Fisicoquímica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, 18071 Granada, Spain; (Á.R.-A.); (J.M.P.); (C.D.B.); (J.A.G.-V.)
- Correspondence: ; Tel.: +34-958243825
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12
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Fueyo-González F, Garcia-Fernandez E, Martínez D, Infantes L, Orte A, González-Vera JA, Herranz R. Smart lanthanide antennas for sensing water. Chem Commun (Camb) 2020; 56:5484-5487. [PMID: 32347241 DOI: 10.1039/d0cc01725f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Two new families of lanthanide antennas are described. 8-Methoxy-4,5-dihydrocyclopenta[de]quinolin-2(1H)-one phosphonates or carboxylates behave as selective antennas exhibiting Eu3+ luminescence in organic solvents, while quinolin-2(1H)-one analogues selectively sensitize the Tb3+ emission. These emissions are quenched by H2O addition. Based on this behaviour, the new lanthanide antennas can be used as highly sensitive water sensors.
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Affiliation(s)
| | - Emilio Garcia-Fernandez
- Departmento de Fisicoquímica, Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, Granada 18071, Spain.
| | - David Martínez
- Departmento de Fisicoquímica, Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, Granada 18071, Spain.
| | - Lourdes Infantes
- Instituto de Química Física Rocasolano, IQFR-CSIC, Serrano 119, Madrid 28006, Spain
| | - Angel Orte
- Departmento de Fisicoquímica, Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, Granada 18071, Spain.
| | - Juan A González-Vera
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, Madrid 28006, Spain. and Departmento de Fisicoquímica, Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, Campus Cartuja, Granada 18071, Spain.
| | - Rosario Herranz
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, Madrid 28006, Spain.
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Jurado R, Adamcik J, López-Haro M, González-Vera JA, Ruiz-Arias Á, Sánchez-Ferrer A, Cuesta R, Domínguez-Vera JM, Calvino JJ, Orte A, Mezzenga R, Gálvez N. Apoferritin Protein Amyloid Fibrils with Tunable Chirality and Polymorphism. J Am Chem Soc 2018; 141:1606-1613. [DOI: 10.1021/jacs.8b11418] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Rocío Jurado
- Department of Inorganic Chemistry, University of Granada, 18071 Granada, Spain
| | - Jozef Adamcik
- Department of Health Sciences and Technology, ETH Zürich, 8092 Zürich, Switzerland
| | - Miguel López-Haro
- Department of Material Science and Metallurgy Engineering and Inorganic Chemistry, University of Cádiz, 11510, Cádiz, Spain
| | - Juan A. González-Vera
- Department of Physical Chemistry, Faculty of Pharmacy, University of Granada, Campus Cartuja, 18071, Granada, Spain
| | - Álvaro Ruiz-Arias
- Department of Physical Chemistry, Faculty of Pharmacy, University of Granada, Campus Cartuja, 18071, Granada, Spain
| | | | - Rafael Cuesta
- Department of Organic and Inorganic Chemistry, EPS Linares, University of Jaén, 23700 Linares, Spain
| | | | - José J. Calvino
- Department of Material Science and Metallurgy Engineering and Inorganic Chemistry, University of Cádiz, 11510, Cádiz, Spain
| | - Angel Orte
- Department of Physical Chemistry, Faculty of Pharmacy, University of Granada, Campus Cartuja, 18071, Granada, Spain
| | - Raffaele Mezzenga
- Department of Health Sciences and Technology, ETH Zürich, 8092 Zürich, Switzerland
- Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Natividad Gálvez
- Department of Inorganic Chemistry, University of Granada, 18071 Granada, Spain
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14
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González-Vera JA, Bouzada D, Bouclier C, Eugenio Vázquez M, Morris MC. Lanthanide-based peptide biosensor to monitor CDK4/cyclin D kinase activity. Chem Commun (Camb) 2018; 53:6109-6112. [PMID: 28530267 DOI: 10.1039/c6cc09948c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We describe a lanthanide biosensor that responds to CDK4 kinase activity in melanoma cell extracts through a significant and dose dependent increase in luminescence, thanks to sensitization of a DOTA[Tb3+] complex incorporated into a CDK4 substrate peptide by a unique tryptophan residue in an adjacent phosphoaminoacid binding moiety.
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Affiliation(s)
- Juan A González-Vera
- Institut des Biomolécules Max Mousseron, CNRS, IBMM-UMR 5247, Université de Montpellier, 15 Av. Charles Flahault, 34093 Montpellier, France.
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15
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Ripoll C, Cheng C, Garcia-Fernandez E, Li J, Orte A, Do H, Jiao L, Robinson D, Crovetto L, González-Vera JA, Talavera EM, Alvarez-Pez JM, Boens N, Ruedas-Rama MJ. Synthesis and Spectroscopy of Benzylamine-Substituted BODIPYs for Bioimaging. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800083] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Consuelo Ripoll
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Cheng Cheng
- The Key Laboratory of Functional Molecular Solids; Ministry of Education; School of Chemistry and Materials Science; Anhui Normal University; 241000 Wuhu China
| | - Emilio Garcia-Fernandez
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Jin Li
- The Key Laboratory of Functional Molecular Solids; Ministry of Education; School of Chemistry and Materials Science; Anhui Normal University; 241000 Wuhu China
| | - Angel Orte
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Hainam Do
- Department of Chemical and Environmental Engineering; University of Nottingham Ningbo China; 199 Taikang East Road 315100 Ningbo China
| | - Lijuan Jiao
- The Key Laboratory of Functional Molecular Solids; Ministry of Education; School of Chemistry and Materials Science; Anhui Normal University; 241000 Wuhu China
| | - David Robinson
- Department of Chemistry and Forensics; Nottingham Trent University; Clifton Lane Nottingham United Kingdom
| | - Luis Crovetto
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Juan A. González-Vera
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Eva M. Talavera
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Jose M. Alvarez-Pez
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
| | - Noël Boens
- Department of Chemistry; KU Leuven (Katholieke Universiteit Leuven); Celestijnenlaan 200f 3001 Leuven Belgium
| | - María Jose Ruedas-Rama
- Department of Physical Chemistry; Faculty of Pharmacy; University of Granada; Campus Cartuja 18071 Granada Spain
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16
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González-Vera JA, Medina RA, Martín-Fontecha M, Gonzalez A, de la Fuente T, Vázquez-Villa H, García-Cárceles J, Botta J, McCormick PJ, Benhamú B, Pardo L, López-Rodríguez ML. A new serotonin 5-HT 6 receptor antagonist with procognitive activity - Importance of a halogen bond interaction to stabilize the binding. Sci Rep 2017; 7:41293. [PMID: 28117458 PMCID: PMC5259792 DOI: 10.1038/srep41293] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 12/16/2016] [Indexed: 12/13/2022] Open
Abstract
Serotonin 5-HT6 receptor has been proposed as a promising therapeutic target for cognition enhancement though the development of new antagonists is still needed to validate these molecules as a drug class for the treatment of Alzheimer's disease and other pathologies associated with memory deficiency. As part of our efforts to target the 5-HT6 receptor, new benzimidazole-based compounds have been designed and synthesized. Site-directed mutagenesis and homology models show the importance of a halogen bond interaction between a chlorine atom of the new class of 5-HT6 receptor antagonists identified herein and a backbone carbonyl group in transmembrane domain 4. In vitro pharmacological characterization of 5-HT6 receptor antagonist 7 indicates high affinity and selectivity over a panel of receptors including 5-HT2B subtype and hERG channel, which suggests no major cardiac issues. Compound 7 exhibited in vivo procognitive activity (1 mg/kg, ip) in the novel object recognition task as a model of memory deficit.
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Affiliation(s)
- Juan A. González-Vera
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Rocío A. Medina
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Mar Martín-Fontecha
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Angel Gonzalez
- Laboratori de Medicina Computacional, Unitat de Bioestadística, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - Tania de la Fuente
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Henar Vázquez-Villa
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Javier García-Cárceles
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Joaquín Botta
- School of Pharmacy, University of East Anglia, NR4 7TJ Norwich, UK
| | | | - Bellinda Benhamú
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - Leonardo Pardo
- Laboratori de Medicina Computacional, Unitat de Bioestadística, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - María L. López-Rodríguez
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
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17
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González-Vera JA, Fueyo-González F, Alkorta I, Peyressatre M, Morris MC, Herranz R. Highly solvatochromic and tunable fluorophores based on a 4,5-quinolimide scaffold: novel CDK5 probes. Chem Commun (Camb) 2016; 52:9652-5. [PMID: 27383006 DOI: 10.1039/c6cc04566a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Novel 4,5-quinolimide-based fluorophores are more solvatochromic and red-shifted than known naphthalimide analogues. Conjugation of one of these fluorophores to a peptide derived from CDK5 kinase demonstrated its sensitivity for monitoring the interaction with its regulatory partner p25. Introduction of the quinolimide-labelled peptide into living glioblastoma cells probed the interaction with endogenous p25.
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18
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Prével C, Pellerano M, González-Vera JA, Henri P, Meunier L, Vollaire J, Josserand V, Morris MC. Fluorescent peptide biosensor for monitoring CDK4/cyclin D kinase activity in melanoma cell extracts, mouse xenografts and skin biopsies. Biosens Bioelectron 2016; 85:371-380. [PMID: 27203461 DOI: 10.1016/j.bios.2016.04.050] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/15/2016] [Accepted: 04/18/2016] [Indexed: 11/28/2022]
Abstract
Melanoma constitutes the most aggressive form of skin cancer, which further metastasizes into a deadly form of cancer. The p16(INK4a)-Cyclin D-CDK4/6-pRb pathway is dysregulated in 90% of melanomas. CDK4/Cyclin D kinase hyperactivation, associated with mutation of CDK4, amplification of Cyclin D or loss of p16(INK4a) leads to increased risk of developing melanoma. This kinase therefore constitutes a key biomarker in melanoma and an emerging pharmacological target, however there are no tools enabling direct detection or quantification of its activity. Here we report on the design and application of a fluorescent peptide biosensor to quantify CDK4 activity in melanoma cell extracts, skin biopsies and melanoma xenografts. This biosensor provides sensitive means of comparing CDK4 activity between different melanoma cell lines and further responds to CDK4 downregulation by siRNA or small-molecule inhibitors. By affording means of monitoring CDK4 hyperactivity consequent to cancer-associated molecular alterations in upstream signaling pathways that converge upon this kinase, this biosensor offers an alternative to immunological identification of melanoma-specific biomarkers, thereby constituting an attractive tool for diagnostic purposes, providing complementary functional information to histological analysis, of particular utility for detection of melanoma onset in precancerous lesions. This is indeed the first fluorescent peptide biosensor which has been successfully implemented to monitor kinase activity in skin samples and melanoma tumour xenografts. Moreover by enabling to monitor response to CDK4 inhibitors, this biosensor constitutes an attractive companion assay to identify compounds of therapeutic relevance for melanoma.
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Affiliation(s)
- Camille Prével
- Institut des Biomolécules Max Mousseron, CNRS, UMR 5247, Université de Montpellier, Faculté de Pharmacie, 15, Av. Charles Flahault, 34093 Montpellier, France
| | - Morgan Pellerano
- Institut des Biomolécules Max Mousseron, CNRS, UMR 5247, Université de Montpellier, Faculté de Pharmacie, 15, Av. Charles Flahault, 34093 Montpellier, France
| | - Juan A González-Vera
- Institut des Biomolécules Max Mousseron, CNRS, UMR 5247, Université de Montpellier, Faculté de Pharmacie, 15, Av. Charles Flahault, 34093 Montpellier, France
| | - Pauline Henri
- Institut des Biomolécules Max Mousseron, CNRS, UMR 5247, Université de Montpellier, Faculté de Pharmacie, 15, Av. Charles Flahault, 34093 Montpellier, France
| | - Laurent Meunier
- Institut des Biomolécules Max Mousseron, CNRS, UMR 5247, Université de Montpellier, Faculté de Pharmacie, 15, Av. Charles Flahault, 34093 Montpellier, France
| | - Julien Vollaire
- INSERM U823, Institut Albert Bonniot, F-38000 Grenoble, France; Universite Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France
| | - Véronique Josserand
- INSERM U823, Institut Albert Bonniot, F-38000 Grenoble, France; Universite Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France
| | - May C Morris
- Institut des Biomolécules Max Mousseron, CNRS, UMR 5247, Université de Montpellier, Faculté de Pharmacie, 15, Av. Charles Flahault, 34093 Montpellier, France.
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19
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Gamo AM, González-Vera JA, Rueda-Zubiaurre A, Alonso D, Vázquez-Villa H, Martín-Couce L, Palomares Ó, López JA, Martín-Fontecha M, Benhamú B, López-Rodríguez ML, Ortega-Gutiérrez S. Chemoproteomic Approach to Explore the Target Profile of GPCR ligands: Application to 5-HT1A
and 5-HT6
Receptors. Chemistry 2015; 22:1313-21. [DOI: 10.1002/chem.201503101] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Ana M. Gamo
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Juan A. González-Vera
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Ainoa Rueda-Zubiaurre
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Dulce Alonso
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Henar Vázquez-Villa
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Lidia Martín-Couce
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Óscar Palomares
- Departamento de Bioquímica y Biología Molecular I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Juan A. López
- Proteomics Unit; Centro Nacional de Investigaciones Cardiovasculares, CNIC; 28029 Madrid Spain
| | - Mar Martín-Fontecha
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Bellinda Benhamú
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - María L. López-Rodríguez
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Silvia Ortega-Gutiérrez
- Departamento de Química Orgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
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20
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González-Vera JA, Morris MC. Fluorescent Reporters and Biosensors for Probing the Dynamic Behavior of Protein Kinases. Proteomes 2015; 3:369-410. [PMID: 28248276 PMCID: PMC5217393 DOI: 10.3390/proteomes3040369] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 09/30/2015] [Accepted: 10/23/2015] [Indexed: 12/20/2022] Open
Abstract
Probing the dynamic activities of protein kinases in real-time in living cells constitutes a major challenge that requires specific and sensitive tools tailored to meet the particular demands associated with cellular imaging. The development of genetically-encoded and synthetic fluorescent biosensors has provided means of monitoring protein kinase activities in a non-invasive fashion in their native cellular environment with high spatial and temporal resolution. Here, we review existing technologies to probe different dynamic features of protein kinases and discuss limitations where new developments are required to implement more performant tools, in particular with respect to infrared and near-infrared fluorescent probes and strategies which enable improved signal-to-noise ratio and controlled activation of probes.
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Affiliation(s)
- Juan A González-Vera
- Cell Cycle Biosensors & Inhibitors, Department of Amino Acids, Peptides and Proteins, Institute of Biomolecules Max Mousseron (IBMM) CNRS-UMR 5247, 15 Avenue Charles Flahault, Montpellier 34093, France.
| | - May C Morris
- Cell Cycle Biosensors & Inhibitors, Department of Amino Acids, Peptides and Proteins, Institute of Biomolecules Max Mousseron (IBMM) CNRS-UMR 5247, 15 Avenue Charles Flahault, Montpellier 34093, France.
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21
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Affiliation(s)
| | | | | | - Rosario Herranz
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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22
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23
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Vázquez-Villa H, González-Vera JA, Benhamú B, Viso A, Fernández de la Pradilla R, Junquera E, Aicart E, López-Rodríguez ML, Ortega-Gutiérrez S. Development of Molecular Probes for the Human 5-HT6 Receptor. J Med Chem 2010; 53:7095-106. [DOI: 10.1021/jm1007177] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Alma Viso
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas, Juan de la Cierva 3, E-28006 Madrid, Spain
| | - Roberto Fernández de la Pradilla
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas, Juan de la Cierva 3, E-28006 Madrid, Spain
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24
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González-Vera JA, Luković E, Imperiali B. Synthesis of red-shifted 8-hydroxyquinoline derivatives using click chemistry and their incorporation into phosphorylation chemosensors. J Org Chem 2009; 74:7309-14. [PMID: 19725503 DOI: 10.1021/jo901369k] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Protein phosphorylation is a ubiquitous post-translational modification, and protein kinases, the enzymes that catalyze the phosphoryl transfer, are involved in nearly every aspect of normal, as well as aberrant, cell function. Here we describe the synthesis of novel, red-shifted 8-hydroxyquinoline-based fluorophores and their incorporation into peptidyl kinase activity reporters. Replacement of the sulfonamide group of the sulfonamido-oxine (1, Sox) chromophore, which has been previously used in kinase sensing, by a 1,4-substituted triazole moiety prepared via click chemistry resulted in a significant bathochromic shift in the fluorescence excitation (15 nm) and emission (40 nm) maxima for the Mg(2+) chelate. Furthermore, when a click derivative was incorporated into a chemosensor for MK2, the kinase accepted the new substrate as efficiently as the previously reported Sox-based sensor. Taken together, these results extend the utility range of kinase sensors that are based on chelation-enhanced fluorescence (CHEF).
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Affiliation(s)
- Juan A González-Vera
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge,Massachusetts 02139, USA
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25
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González-Vera JA, Luković E, Imperiali B. A rapid method for generation of selective Sox-based chemosensors of Ser/Thr kinases using combinatorial peptide libraries. Bioorg Med Chem Lett 2009; 19:1258-60. [PMID: 19157873 PMCID: PMC2838374 DOI: 10.1016/j.bmcl.2008.12.090] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Accepted: 12/12/2008] [Indexed: 10/21/2022]
Abstract
A novel screening method to identify selective Sox-based fluorescent probes for Ser/Thr kinases has been developed. Peptide libraries were exposed to a kinase of interest and the products of the timed reaction were analyzed by MALDI-TOF. To demonstrate the potential of this methodology, a selective substrate for Aurora A kinase was identified that showed a 7-fold improvement in catalytic efficiency over the best substrate described to date in the literature.
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Affiliation(s)
- Juan A González-Vera
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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26
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Luković E, González-Vera JA, Imperiali B. Recognition-domain focused chemosensors: versatile and efficient reporters of protein kinase activity. J Am Chem Soc 2008; 130:12821-7. [PMID: 18759402 DOI: 10.1021/ja8046188] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Catalyzed by kinases, serine/threonine and tyrosine phosphorylation is a vital mechanism of intracellular regulation. Thus, assays that easily monitor kinase activity are critical in both academic and pharmaceutical settings. We previously developed sulfonamido-oxine (Sox)-based fluorescent peptides following a beta-turn focused (BTF) design for the continuous assay of kinase activity in vitro and in cell lysates. Upon phosphorylation of the Sox-containing peptide, the chromophore binds Mg (2+) and undergoes chelation-enhanced fluorescence (CHEF). Although the design was applied successfully to the development of several kinase sensors, an intrinsic limitation was that only residues C- or N-terminal to the phosphorylated residue could be used to derive specificity for the target kinase. To address this limitation, a new, recognition-domain focused (RDF) strategy was developed that also relies on CHEF. In this approach, the requirement for the constrained beta-turn motif is obviated by alkylation of a cysteine residue with a Sox-based derivative to afford an amino acid termed C-Sox. The RDF design allows inclusion of extended binding determinants to maximize recognition by the cognate kinase, which has now permitted the construction of chemosensors for a variety of representative Ser/Thr (PKC alpha, PKC betaIota, PKC delta, Pim2, Akt1, MK2, and PKA) as well as receptor (IRK) and nonreceptor (Src, Abl) Tyr kinases with greatly enhanced selectivity. The new sensors have up to 28-fold improved catalytic efficiency and up to 66-fold lower K M when compared to the corresponding BTF probes. The improved generality of the strategy is exemplified with the synthesis and analysis of Sox-based probes for PKC betaIota and PKC delta, which were previously unattainable using the BTF approach.
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Affiliation(s)
- Elvedin Luković
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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27
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González-Vera JA, García-López MT, Herranz R. Synthesis of Indole Alkaloid Analogues: Novel Domino Stereoselective Electrophile Addition−Cyclizations of Tryptophan-Derived α-Amino Nitriles. J Org Chem 2007; 72:5395-8. [PMID: 17579457 DOI: 10.1021/jo070684u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of new indole alkaloid analogues, containing a 1,2,4,5,10b,10c-hexahydropyrrolo[1',2',3':1,9a,9]imidazo[1,2-a]indole skeleton, via highly stereoselective novel domino cyclative halogenation or prenylation reactions of tryptophan-derived alpha-amino nitriles, is described.
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28
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González-Vera JA, García-López MT, Herranz R. Regioselective Base-Promoted Nucleophilic Ring Opening of Spirocyclic 2,6-Dioxopiperazines: Synthesis ofN-(1-Carboxycyclohexyl)amino Acid Derivatives. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
[reaction: see text] The scope and stereoselectivity of the acid-promoted cyclization of new tryptophan-based alpha-amino nitriles derived from either ketones or aldehydes to novel hexahydropyrrolo[1',2',3':1,9a,9]imidazo[1,2-a]indoles is described. This cyclization involves the generation of two or three stereogenic centers. The time and stereoselectivity of this reaction mostly depended on both the steric volume of the substituents at the amino nitrile and its stereochemistry. Unhindered amino nitriles gave exclusively 2-exo-isomers, while hindered amino nitriles, which required higher reaction times, provided also these isomers under kinetic control. Under thermodynamic control, the 2-endo-isomer was the main reaction product, except for the benzaldehyde-derived alpha-amino nitriles, where a favorable electronic interaction between the phenyl and methoxycarbonyl groups in a relative cis-disposition might be responsible of the formation of the 2-exo-isomer as the only cyclization product.
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30
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González-Vera JA, García-López MT, Herranz R. Molecular Diversity via Amino Acid Derived α-Amino Nitriles: Synthesis of Spirocyclic 2,6-Dioxopiperazine Derivatives. J Org Chem 2005; 70:3660-6. [PMID: 15845004 DOI: 10.1021/jo050146m] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Chiral spirocyclic 2,6-dioxopiperazines were synthesized from amino acid derived alpha-quaternary alpha-amino nitriles via H(2)SO(4)-promoted cyano hydration, followed by base-mediated cyclization and N-alkylation. This methodology, requiring the previous preparation of the amino nitrile by a modified Strecker reaction, was applied to Phe, Trp, Pro, Asp, Glu, and Ser derivatives. In the case of the Trp-derived amino nitrile the major product of the treatment with H(2)SO(4) was not the expected carboxamide, but a new tetracyclic indoline derivative containing the novel heterocyclic system hexahydropyrrolo[1',2',3':1,9a,9]imidazo[1,2-a]indole, as a result of a domino tautomerization. The treatment of this indoline derivative with refluxing 1 N HCl led to a Trp-derived 2,6-dioxopiperazine. The 2,6-dioxopiperazine ring opened under the reaction conditions of methyl ester saponification, giving N-(carboxyalkyl)amino acid derivatives. Therefore, the synthesis of 2,6-dioxopiperazines containing free carboxylic acids from the respective methyl esters required transesterification to benzyl esters, followed by hydrogenolysis.
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31
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González-Vera JA, García-López MT, Herranz R. Unprecedented Stereospecific Synthesis of a Novel Tetracyclic Ring System, a Hybrid of Tetrahydropyrrolo[2,3-b]indole and Tetrahydroimidazo[1,2-a]indole, via a Domino Reaction upon a Tryptophan-Derived Amino Nitrile. Org Lett 2004; 6:2641-4. [PMID: 15281733 DOI: 10.1021/ol049222i] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Compounds containing a novel tetracyclic ring system, a hybrid of tetrahydropyrrolo[2,3-b]indole and tetrahydroimidazo[1,2-a]indole, are synthesized via an acid-mediated stereospecific domino tautomerization of a tryptophan-derived alpha-amino nitrile. Characterization of these new compounds and preliminary studies on the reactivity of the tetracyclic heterocyclic system are reported. [reaction: see text]
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