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Rivera-Fuentes P, Weiss M. The 52nd EUCHEMS Conference on Stereochemistry: Bürgenstock Conference 2017, Brunnen, April 30th–May 4th, 2017. Chimia (Aarau) 2017; 71:387-389. [DOI: 10.2533/chimia.2017.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Tirla A, Rivera-Fuentes P. Development of a Photoactivatable Phosphine Probe for Induction of Intracellular Reductive Stress with Single-Cell Precision. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608779] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Xiong Y, Rivera-Fuentes P, Sezgin E, Vargas Jentzsch A, Eggeling C, Anderson HL. Photoswitchable Spiropyran Dyads for Biological Imaging. Org Lett 2016; 18:3666-9. [PMID: 27456166 PMCID: PMC5010358 DOI: 10.1021/acs.orglett.6b01717] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of a small-molecule dyad consisting of a far-red-emitting silicon rhodamine dye that is covalently linked to a photochromic spironaphthothiopyran unit, which serves as a photoswitchable quencher, is reported. This system can be switched reversibly between the fluorescent and nonfluorescent states using visible light at wavelengths of 405 and 630 nm, respectively, and it works effectively in aqueous solution. Live-cell imaging demonstrates that this dyad has several desirable features, including excellent membrane permeability, fast and reversible modulation of fluorescence by visible light, and good contrast between the bright and dark states.
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Rivera-Fuentes P, Lippard SJ. Metal-based optical probes for live cell imaging of nitroxyl (HNO). Acc Chem Res 2015; 48:2927-34. [PMID: 26550842 DOI: 10.1021/acs.accounts.5b00388] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitroxyl (HNO) is a biological signaling agent that displays distinctive reactivity compared to nitric oxide (NO). As a consequence, these two reactive nitrogen species trigger different physiological responses. Selective detection of HNO over NO has been a challenge for chemists, and several fluorogenic molecular probes have been recently developed with that goal in mind. Common constructs take advantage of the HNO-induced reduction of Cu(II) to Cu(I). The sensing mechanism of such probes relies on the ability of the unpaired electron in a d orbital of the Cu(II) center to quench the fluorescence of a photoemissive ligand by either an electron or energy transfer mechanism. Experimental and theoretical mechanistic studies suggest that proton-coupled electron transfer mediates this process, and careful tuning of the copper coordination environment has led to sensors with optimized selectivity and kinetics. The current optical probes cover the visible and near-infrared regions of the spectrum. This palette of sensors comprises structurally and functionally diverse fluorophores such as coumarin (blue/green emission), boron dipyrromethane (BODIPY, green emission), benzoresorufin (red emission), and dihydroxanthenes (near-infrared emission). Many of these sensors have been successfully applied to detect HNO production in live cells. For example, copper-based optical probes have been used to detect HNO production in live mammalian cells that have been treated with H2S and various nitrosating agents. These studies have established a link between HSNO, the smallest S-nitrosothiol, and HNO. In addition, a near-infrared HNO sensor has been used to perform multicolor/multianalyte microscopy, revealing that exogenously applied HNO elevates the concentration of intracellular mobile zinc. This mobilization of zinc ions is presumably a consequence of nitrosation of cysteine residues in zinc-chelating proteins such as metallothionein. Future challenges for the optical imaging of HNO include devising probes that can detect HNO reversibly, especially because ratiometric imaging can only report equilibrium concentrations when the sensing event is reversible. Another important aspect that needs to be addressed is the creation of probes that can sense HNO in specific subcellular locations. These tools would be useful to identify the organelles in which HNO is produced in mammalian cells and probe the intracellular signaling networks in which this reactive nitrogen species is involved. In addition, near-infrared emitting probes might be applied to detect HNO in thicker specimens, such as acute tissue slices and even live animals, enabling the investigation of the roles of HNO in physiological or pathological conditions in multicellular systems.
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Mügge C, Marzo T, Massai L, Hildebrandt J, Ferraro G, Rivera-Fuentes P, Metzler-Nolte N, Merlino A, Messori L, Weigand W. Platinum(II) Complexes with O,S Bidentate Ligands: Biophysical Characterization, Antiproliferative Activity, and Crystallographic Evidence of Protein Binding. Inorg Chem 2015; 54:8560-70. [PMID: 26280387 DOI: 10.1021/acs.inorgchem.5b01238] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We recently characterized a series of novel platinum(II) compounds bearing a conserved O,S binding moiety as a bifunctional ligand and evaluated their solution behavior and antiproliferative properties in vitro against a representative cancer cell line. On the whole, those platinum compounds showed an appreciable stability in mixed dimethyl sulfoxide-aqueous buffers and promising in vitro cytotoxic effects; yet they manifested a rather limited solubility in aqueous media making them poorly suitable for further pharmaceutical development. To overcome this drawback, four new derivatives of this series were prepared and characterized based on a careful choice of substituents on the O,S bidentate ligand. The solubility and stability profile of these novel compounds in a reference buffer was determined, as well as the ligands' log P(o/w) value (P(o/w) = n-octanol-water partition coefficient) as an indirect measure for the complexes' lipophilicity. The antiproliferative properties were comparatively evaluated in a panel of three cancer cell lines. The protein binding properties of the four platinum compounds were assessed using the model protein hen egg white lysozyme (HEWL), and the molecular structures of two relevant HEWL-metallodrug adducts were solved. Overall, it is shown that a proper choice of the substituents leads to a higher solubility and enables a selective fine-tuning of the antiproliferative properties. The implications of these results are thoroughly discussed.
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Rivera-Fuentes P, Wrobel AT, Zastrow ML, Khan M, Georgiou J, Luyben TT, Roder JC, Okamoto K, Lippard SJ. A Far-Red Emitting Probe for Unambiguous Detection of Mobile Zinc in Acidic Vesicles and Deep Tissue. Chem Sci 2015; 6:1944-1948. [PMID: 25815162 PMCID: PMC4372157 DOI: 10.1039/c4sc03388d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/02/2015] [Indexed: 12/12/2022] Open
Abstract
Imaging mobile zinc in acidic environments remains challenging because most small-molecule optical probes display pH-dependent fluorescence. Here we report a reaction-based sensor that detects mobile zinc unambiguously at low pH. The sensor responds reversibly and with a large dynamic range to exogenously applied Zn2+ in lysosomes of HeLa cells, endogenous Zn2+ in insulin granules of MIN6 cells, and zinc-rich mossy fiber boutons in hippocampal tissue from mice. This long-wavelength probe is compatible with the green-fluorescent protein, enabling multicolor imaging, and facilitates visualization of mossy fiber boutons at depths of >100 µm, as demonstrated by studies in live tissue employing two-photon microscopy.
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Wrobel AT, Johnstone TC, Deliz Liang A, Lippard SJ, Rivera-Fuentes P. A fast and selective near-infrared fluorescent sensor for multicolor imaging of biological nitroxyl (HNO). J Am Chem Soc 2014; 136:4697-705. [PMID: 24564324 PMCID: PMC3985477 DOI: 10.1021/ja500315x] [Citation(s) in RCA: 162] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
The
first near-infrared fluorescent turn-on sensor for the detection
of nitroxyl (HNO), the one-electron reduced form of nitric oxide (NO),
is reported. The new copper-based probe, CuDHX1, contains a dihydroxanthene
(DHX) fluorophore and a cyclam derivative as a Cu(II) binding site.
Upon reaction with HNO, CuDHX1 displays a five-fold fluorescence turn-on
in cuvettes and is selective for HNO over thiols and reactive nitrogen
and oxygen species. CuDHX1 can detect exogenously applied HNO in live
mammalian cells and in conjunction with the zinc-specific, green-fluorescent
sensor ZP1 can perform multicolor/multianalyte microscopic imaging.
These studies reveal that HNO treatment elicits an increase in the
concentration of intracellular mobile zinc.
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Rivera-Fuentes P, Lippard SJ. SpiroZin1: a reversible and pH-Insensitive, reaction-based, red-fluorescent probe for imaging biological mobile zinc. ChemMedChem 2014; 9:1238-43. [PMID: 24616292 DOI: 10.1002/cmdc.201400014] [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: 01/03/2014] [Indexed: 11/06/2022]
Abstract
A reversible, reaction-based sensor for biological mobile zinc was designed, prepared, and characterized. The sensing mechanism of this probe is based on the zinc-induced, ring-opening reaction of spirobenzopyran to give a cyanine fluorophore that emits in the deep-red region of the electromagnetic spectrum. This probe is not activated by protons and operates efficiently in aqueous solution at pH 7 and high ionic strength. The mechanism of this reaction was studied by using a combination of kinetics experiments and DFT calculations. The biocompatibility of the probe was demonstrated in live HeLa cells.
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Rivera-Fuentes P, Rekowski MVW, Schweizer WB, Gisselbrecht JP, Boudon C, Diederich F. Cascade Carbopalladation Reaction between Alkynes and gem-Dibromoolefins: Facile Access to Monoannelated Pentalenes. Org Lett 2012; 14:4066-9. [DOI: 10.1021/ol301670d] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Rivera-Fuentes P, Diederich F. Allenes in Molecular Materials. Angew Chem Int Ed Engl 2012; 51:2818-28. [DOI: 10.1002/anie.201108001] [Citation(s) in RCA: 256] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Indexed: 11/11/2022]
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Ehmke V, Quinsaat JEQ, Rivera-Fuentes P, Heindl C, Freymond C, Rottmann M, Brun R, Schirmeister T, Diederich F. Tuning and predicting biological affinity: aryl nitriles as cysteine protease inhibitors. Org Biomol Chem 2012; 10:5764-8. [DOI: 10.1039/c2ob00034b] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Reisinger CM, Rivera-Fuentes P, Lampart S, Schweizer WB, Diederich F. Cascade Pericyclic Reactions of Alleno-Acetylenes: Facile Access to Highly Substituted Cyclobutene, Dendralene, Pentalene, and Indene Skeletons. Chemistry 2011; 17:12906-11. [DOI: 10.1002/chem.201102852] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Rivera-Fuentes P, Nieto-Ortega B, Schweizer WB, López Navarrete JT, Casado J, Diederich F. Enantiopure, Monodisperse Alleno-acetylenic Cyclooligomers: Effect of Symmetry and Conformational Flexibility on the Chiroptical Properties of Carbon-Rich Compounds. Chemistry 2011; 17:3876-85. [DOI: 10.1002/chem.201100131] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Indexed: 11/11/2022]
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Rivera-Fuentes P, Alonso-Gómez JL, Petrovic A, Seiler P, Santoro F, Harada N, Berova N, Rzepa H, Diederich F. Inside Cover: Enantiomerically Pure Alleno-Acetylenic Macrocycles: Synthesis, Solid-State Structures, Chiroptical Properties, and Electron Localization Function Analysis (Chem. Eur. J. 32/2010). Chemistry 2010. [DOI: 10.1002/chem.201090158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Rivera-Fuentes P, Alonso-Gómez JL, Petrovic A, Seiler P, Santoro F, Harada N, Berova N, Rzepa H, Diederich F. Enantiomerically Pure Alleno-Acetylenic Macrocycles: Synthesis, Solid-State Structures, Chiroptical Properties, and Electron Localization Function Analysis. Chemistry 2010; 16:9796-807. [DOI: 10.1002/chem.201001087] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kraszewska A, Rivera-Fuentes P, Rapenne G, Crassous J, Petrovic AG, Alonso-Gómez JL, Huerta E, Diederich F, Thilgen C. Regioselectivity in Tether-Directed Remote Functionalization - The Addition of a Cyclotriveratrylene-Based Trimalonate to C60 Revisited. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Buschhaus B, Convertino V, Rivera-Fuentes P, Alonso-Gómez JL, Petrovic AG, Diederich F. Optically Active Trialkynyl(phenyl)methane: Synthesis and Determination of Its Absolute Configuration by Vibrational Circular Dichroism (VCD) and Optical Rotatory Dispersion (ORD). European J Org Chem 2010. [DOI: 10.1002/ejoc.201000076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yamada M, Rivera-Fuentes P, Schweizer W, Diederich F. Optische Stabilität axial-chiraler push-pull-substituierter Buta-1,3-diene: Effekt einer einzelnen Methylgruppe auf der Oberfläche von C60. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906853] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yamada M, Rivera-Fuentes P, Schweizer W, Diederich F. Optical Stability of Axially Chiral Push-Pull-Substituted Buta-1,3-dienes: Effect of a Single Methyl Group on the C60 Surface. Angew Chem Int Ed Engl 2010; 49:3532-5. [DOI: 10.1002/anie.200906853] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Rivera-Fuentes P, Alonso-Gómez J, Petrovic A, Santoro F, Harada N, Berova N, Diederich F. Amplifikation der Chiralität in monodispersen, enantiomerenreinen Allen-Acetylen-Oligomeren. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906191] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Rivera-Fuentes P, Alonso-Gómez J, Petrovic A, Santoro F, Harada N, Berova N, Diederich F. Amplification of Chirality in Monodisperse, Enantiopure Alleno-Acetylenic Oligomers. Angew Chem Int Ed Engl 2010; 49:2247-50. [DOI: 10.1002/anie.200906191] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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48
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Alonso-Gómez JL, Petrovic A, Harada N, Rivera-Fuentes P, Berova N, Diederich F. Chiral Induction from Allenes into Twisted 1,1,4,4-Tetracyanobuta-1,3-dienes (TCBDs): Conformational Assignment by Circular Dichroism Spectroscopy. Chemistry 2009; 15:8396-8400. [DOI: 10.1002/chem.200900103] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Alonso-Gómez J, Rivera-Fuentes P, Harada N, Berova N, Diederich F. Cover Picture: An Enantiomerically Pure Alleno-Acetylenic Macrocycle: Synthesis and Rationalization of Its Outstanding Chiroptical Response (Angew. Chem. Int. Ed. 30/2009). Angew Chem Int Ed Engl 2009. [DOI: 10.1002/anie.200990154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Alonso-Gómez J, Rivera-Fuentes P, Harada N, Berova N, Diederich F. Titelbild: Ein enantiomerenreiner alleno-acetylenischer Makrocyclus: Synthese und Interpretation seiner herausragenden chiroptischen Eigenschaften (Angew. Chem. 30/2009). Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200990156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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