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Jin X, Du X, Liu G, Jin B, Cao K, Chen F, Huang Q. Efficient destruction of basic organo-nitrogenous compounds in liquid hydrocarbon fuel using ascorbic acid/H 2O 2 system under ambient condition. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132242. [PMID: 37562355 DOI: 10.1016/j.jhazmat.2023.132242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/25/2023] [Accepted: 08/05/2023] [Indexed: 08/12/2023]
Abstract
Due to the limitations of the conventional refinery methods, development of a new method such as oxidative denitrogenation (ODN) is highly desirable. This study described a novel ODN to remove organo-nitrogenous compounds (ONCs) in liquid fuel by ascorbic acid (AscH2) and H2O2 redox system under ambient conditions. Seven ONCs including pyridine, quinoline, acridine, 7,8-benzoquinoline, indole, N-methylpyrrolidone (NMP), and N,N-dimethylformamide (DMF) were chosen to assess the fuel-denitrified ability of the AscH2/H2O2 system. The results showed that the basic group of ONCs (pyridine, quinoline, and acridine) can be effectively removed (removal ratio > 95 %) while the removal efficiency of water-soluble compounds (7,8-benzoquinoline, NMP, and DMF) was moderate (61-68 %) under a mild temperature (30 °C) and atmospheric pressure. Free radical quenching and electron paramagnetic resonance experiments confirmed that hydroxyl and AscH2 radicals played a major role in the degradation of ONCs. The degraded products of quinoline were analyzed by gas chromatography-mass spectroscopy and ion chromatography. Based on the identified intermediate products, a putative reaction pathway majorly involving three steps of N-onium formation, transfer hydrogenation, and free radical oxidative ring-opening was suggested for the quinoline degradation. The presented approach can be performed at a normal temperature and pressure and will live up to expectations in the pre-denitrogenation and selective removal of basic ONCs in fuel oils.
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Affiliation(s)
- Xin Jin
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Xiaohu Du
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Guangrong Liu
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Bangheng Jin
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Kaihong Cao
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Fangyue Chen
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Qiang Huang
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies, School of Materials and Energy, Yunnan University, Kunming 650091, PR China.
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2
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Sosa MJ, Fonseca JL, Sakaya A, Urrutia MN, Petroselli G, Erra-Balsells R, Quindt MI, Bonesi SM, Cosa G, Vignoni M, Thomas AH. Alkylation converts riboflavin into an efficient photosensitizer of phospholipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184155. [PMID: 37003545 DOI: 10.1016/j.bbamem.2023.184155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/12/2023] [Accepted: 03/22/2023] [Indexed: 04/03/2023]
Abstract
A new decyl chain [-(CH2)9CH3] riboflavin conjugate has been synthesized and investigated. A nucleophilic substitution (SN2) reaction was used for coupling the alkyl chain to riboflavin (Rf), a model natural photosensitizer. As expected, the alkylated compound (decyl-Rf) is significantly more lipophilic than its precursor and efficiently intercalates within phospholipid bilayers, increasing its fluorescence quantum yield. The oxidative damage to lipid membranes photoinduced by decyl-Rf was investigated in large and giant unilamellar vesicles (LUVs and GUVs, respectively) composed of different phospholipids. Using a fluorogenic probe, fast radical formation and singlet oxygen generation was demonstrated upon UVA irradiation in vesicles containing decyl-Rf. Photosensitized formation of conjugated dienes and hydroperoxides, and membrane leakage in LUVs rich in poly-unsaturated fatty acids were also investigated. The overall assessment of the results shows that decyl-Rf is a significantly more efficient photosensitizer of lipids than its unsubstituted precursor and that the association to lipid membranes is key to trigger phospholipid oxidation. Alkylation of hydrophilic photosensitizers as a simple and general synthetic tool to obtain efficient photosensitizers of biomembranes, with potential applications, is discussed.
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Affiliation(s)
- María José Sosa
- Departamento de Química, Facultad de Ciencias Exactas, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, La Plata, Argentina
| | - José Luis Fonseca
- Departamento de Química, Facultad de Ciencias Exactas, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, La Plata, Argentina; Department of Chemistry, Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal H3A 0B8, QC, Canada
| | - Aya Sakaya
- Department of Chemistry, Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal H3A 0B8, QC, Canada
| | - María Noel Urrutia
- Departamento de Química, Facultad de Ciencias Exactas, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, La Plata, Argentina
| | - Gabriela Petroselli
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
| | - Rosa Erra-Balsells
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
| | - Matías I Quindt
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
| | - Sergio M Bonesi
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
| | - Gonzalo Cosa
- Department of Chemistry, Quebec Center for Advanced Materials (QCAM), McGill University, 801 Sherbrooke Street West, Montreal H3A 0B8, QC, Canada
| | - Mariana Vignoni
- Departamento de Química, Facultad de Ciencias Exactas, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, La Plata, Argentina.
| | - Andrés H Thomas
- Departamento de Química, Facultad de Ciencias Exactas, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, La Plata, Argentina.
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3
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Sakaya A, Bacellar IOL, Fonseca JL, Durantini AM, McCain J, Xu L, Vignoni M, Thomas AH, Baptista MS, Cosa G. Singlet Oxygen Flux, Associated Lipid Photooxidation, and Membrane Expansion Dynamics Visualized on Giant Unilamellar Vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:442-452. [PMID: 36576408 DOI: 10.1021/acs.langmuir.2c02720] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The physical properties of lipid membranes depend on their lipid composition. Photosensitized singlet oxygen (1O2) provides a handle to spatiotemporally control the generation of lipid hydroperoxides via the ene reaction, enabling fundamental studies on membrane dynamics in response to chemical composition changes. Critical to relating the physical properties of the lipid membrane to hydroperoxide formation is the availability of a sensitive reporter to quantify the arrival of 1O2. Here, we show that a fluorogenic α-tocopherol analogue, H4BPMHC, undergoes a >360-fold emission intensity enhancement in liposomes following a reaction with 1O2. Rapid quenching of 1O2 by the probe (kq = 4.9 × 108 M-1 s-1) ensures zero-order kinetics of probe consumption. The remarkable intensity enhancement of H4BPMHC upon 1O2 trapping, its linear temporal behavior, and its protective role in outcompeting membrane damage provide a sensitive and reliable method to quantify the 1O2 flux on lipid membranes. Armed with this probe, fluorescence microscopy studies were devised to enable (i) monitoring the flux of photosensitized 1O2 into giant unilamellar vesicles (GUVs), (ii) establishing the onset of the ene reaction with the double bonds of monounsaturated lipids, and (iii) visualizing the ensuing collective membrane expansion dynamics associated with molecular changes in the lipid structure upon hydroperoxide formation. A correlation was observed between the time for antioxidant H4BPMHC consumption by 1O2 and the onset of membrane fluctuations and surface expansion. Together, our imaging studies with H4BPMHC in GUVs provide a methodology to explore the intimate relationship between photosensitizer activity, chemical insult, membrane morphology, and its collective dynamics.
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Affiliation(s)
- Aya Sakaya
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Isabel O L Bacellar
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo, São PauloCEP 05508-000, Brazil
| | - José Luis Fonseca
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, La Plata1900, Argentina
| | - Andrés M Durantini
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Julia McCain
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Laiyi Xu
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Mariana Vignoni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, La Plata1900, Argentina
| | - Andrés H Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, La Plata1900, Argentina
| | - Mauricio S Baptista
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo, São PauloCEP 05508-000, Brazil
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
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Matsuoka Y, Yamada KI. Detection and structural analysis of lipid-derived radicals in vitro and in vivo. Free Radic Res 2021; 55:441-449. [PMID: 33504242 DOI: 10.1080/10715762.2021.1881500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Lipids can be oxidized by reactive oxygen species, resulting in lipid peroxidation and the formation of reactive metabolites such as lipid-derived electrophiles. These products have been reported to induce inflammation, angiogenesis, and ferroptosis. Lipid peroxidation can produce many different products, each of which performs a different function, and which can be challenging to detect in vivo. The initial products of lipid oxidation are lipid-derived radicals, which can cause extensive chain reactions leading to lipid peroxidation. Hence, the ability to detect lipid radicals may provide information about this important class of molecules and the mechanism by which they cause cellular and tissue damage in a wide range of oxidative conditions. In this review, we report recent scientific advances in the detection of lipid-derived radicals in vitro and in cultured cells. We also introduce the possibility of visualization and structural analysis of lipid-derived radicals generated not only in in cells but also in animal tissue samples from oxidative disease models, using fluorescence-based lipid radicals' detection probes. We anticipate that the various innovative techniques summarized in this paper will be applied and further developed to clarify the role of lipid peroxidation in the pathogenesis of oxidative stress-associated diseases.
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Affiliation(s)
- Yuta Matsuoka
- Physical Chemistry for Life Science Laboratory, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Ken-Ichi Yamada
- Physical Chemistry for Life Science Laboratory, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
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5
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Foret MK, Lincoln R, Do Carmo S, Cuello AC, Cosa G. Connecting the "Dots": From Free Radical Lipid Autoxidation to Cell Pathology and Disease. Chem Rev 2020; 120:12757-12787. [PMID: 33211489 DOI: 10.1021/acs.chemrev.0c00761] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Our understanding of lipid peroxidation in biology and medicine is rapidly evolving, as it is increasingly implicated in various diseases but also recognized as a key part of normal cell function, signaling, and death (ferroptosis). Not surprisingly, the root and consequences of lipid peroxidation have garnered increasing attention from multiple disciplines in recent years. Here we "connect the dots" between the fundamental chemistry underpinning the cascade reactions of lipid peroxidation (enzymatic or free radical), the reactive nature of the products formed (lipid-derived electrophiles), and the biological targets and mechanisms associated with these products that culminate in cellular responses. We additionally bring light to the use of highly sensitive, fluorescence-based methodologies. Stemming from the foundational concepts in chemistry and biology, these methodologies enable visualizing and quantifying each reaction in the cascade in a cellular and ultimately tissue context, toward deciphering the connections between the chemistry and physiology of lipid peroxidation. The review offers a platform in which the chemistry and biomedical research communities can access a comprehensive summary of fundamental concepts regarding lipid peroxidation, experimental tools for the study of such processes, as well as the recent discoveries by leading investigators with an emphasis on significant open questions.
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Affiliation(s)
- Morgan K Foret
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - Richard Lincoln
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8
| | - Sonia Do Carmo
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - A Claudio Cuello
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6.,Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7.,Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada H3A 2B4
| | - Gonzalo Cosa
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8
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6
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Martínez SR, Durantini AM, Becerra MC, Cosa G. Real-Time Single-Cell Imaging Reveals Accelerating Lipid Peroxyl Radical Formation in Escherichia coli Triggered by a Fluoroquinolone Antibiotic. ACS Infect Dis 2020; 6:2468-2477. [PMID: 32786297 DOI: 10.1021/acsinfecdis.0c00317] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The formation of reactive oxygen species (ROS) induced by bactericidal antibiotics has been associated with a common, nonspecific mechanism of cellular death. Herein, we report real-time single-cell fluorescence studies on Escherichia coli stained with a fluorogenic probe for lipid peroxyl radicals showing the generation of this form of ROS when exposed to the minimum inhibitory concentration (MIC) and 10× MIC of the fluoroquinolone antibiotic ciprofloxacin (3 and 30 μM, respectively). Single-cell intensity-time trajectories show an induction period followed by an accelerating phase for cells treated with antibiotic, where initial and maximum intensity achieved following 3.5 h of incubation with antibiotic showed dose-dependent average values. A large fraction of bacteria remains viable after the studies, indicating ROS formation is occurring a priori of cell death. Punctate structures are observed, consistent with membrane blebbing. The addition of a membrane embedding lipid peroxyl radical scavenger, an α-tocopherol analogue, to the media increased the MIC of ciprofloxacin. Lipid peroxyl radical formation precedes E. coli cell death and may be invoked in a cascade event including membrane disruption and consequent cell wall permeabilization. Altogether, our work illustrates that lipid peroxidation is caused by ciprofloxacin in E. coli and suppressed by α-tocopherol analogues. Lipid peroxidation may be invoked in a cascade event including membrane disruption and consequent cell wall permeabilization. Our work provides a methodology to assess antibiotic-induced membrane peroxidation at the single-cell level; this methodology provides opportunities to explore the scope and nature of lipid peroxidation in antibiotic-induced cell lethality.
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Affiliation(s)
- Sol R. Martínez
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
- IMBIV-CONICET and Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Quı́micas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Córdoba X5000, Argentina
| | - Andrés M. Durantini
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - María C. Becerra
- IMBIV-CONICET and Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Quı́micas, Universidad Nacional de Córdoba, Haya de la Torre S/N, Córdoba X5000, Argentina
| | - Gonzalo Cosa
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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Kusio J, Sitkowska K, Konopko A, Litwinienko G. Hydroxycinnamyl Derived BODIPY as a Lipophilic Fluorescence Probe for Peroxyl Radicals. Antioxidants (Basel) 2020; 9:antiox9010088. [PMID: 31968662 PMCID: PMC7022944 DOI: 10.3390/antiox9010088] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/14/2020] [Accepted: 01/15/2020] [Indexed: 01/21/2023] Open
Abstract
Herein, we describe the synthesis of a fluorescent probe NB-2 and its use for the detection of peroxyl radicals. This probe is composed of two receptor segments (4-hydroxycinnamyl moieties) sensitive towards peroxyl radicals that are conjugated with a fluorescent reporter, dipyrrometheneboron difluoride (BODIPY), whose emission changes depend on the oxidation state of the receptors. The measurement of the rate of peroxidation of methyl linoleate in a micellar system in the presence of 1.0 µM NB-2 confirmed its ability to trap lipid peroxyl radicals with the rate constant kinh = 1000 M−1·s−1, which is ten-fold smaller than for pentamethylchromanol (an analog of α-tocopherol). The reaction of NB-2 with peroxyl radicals was further studied via fluorescence measurements in methanol, with α,α′-azobisisobutyronitrile (AIBN) used as a source of radicals generated by photolysis or thermolysis, and in the micellar system at pH 7.4, with 2,2′-azobis(2-amidinopropane) (ABAP) used as a thermal source of the radicals. The reaction of NB-2 receptors with peroxyl radicals manifests itself by the strong increase of a fluorescence with a maximum at 612–616 nm, with a 14-fold enhancement of emission in methanol and a 4-fold enhancement in the micelles, as compared to the unoxidized probe. Our preliminary results indicate that NB-2 behaves as a “switch on” fluorescent probe that is suitable for sensing peroxyl radicals in an organic lipid environment and in bi-phasic dispersed lipid systems.
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Affiliation(s)
- Jaroslaw Kusio
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (J.K.); (A.K.)
| | - Kaja Sitkowska
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (J.K.); (A.K.)
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
- Correspondence: (K.S.); (G.L.)
| | - Adrian Konopko
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (J.K.); (A.K.)
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur St, 02-093 Warsaw, Poland
| | - Grzegorz Litwinienko
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (J.K.); (A.K.)
- Correspondence: (K.S.); (G.L.)
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Greene LE, Lincoln R, Cosa G. Tuning Photoinduced Electron Transfer Efficiency of Fluorogenic BODIPY-α
-Tocopherol Analogues. Photochem Photobiol 2018; 95:192-201. [DOI: 10.1111/php.13062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 11/14/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Lana E. Greene
- Department of Chemistry; Quebec Centre for Advanced Materials (QCAM/CQMF); McGill University; Montreal QC Canada
| | - Richard Lincoln
- Department of Chemistry; Quebec Centre for Advanced Materials (QCAM/CQMF); McGill University; Montreal QC Canada
| | - Gonzalo Cosa
- Department of Chemistry; Quebec Centre for Advanced Materials (QCAM/CQMF); McGill University; Montreal QC Canada
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9
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Glembockyte V, Frenette M, Mottillo C, Durantini AM, Gostick J, Štrukil V, Friščić T, Cosa G. Highly Photostable and Fluorescent Microporous Solids Prepared via Solid-State Entrapment of Boron Dipyrromethene Dyes in a Nascent Metal–Organic Framework. J Am Chem Soc 2018; 140:16882-16887. [DOI: 10.1021/jacs.8b09608] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Viktorija Glembockyte
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
| | - Mathieu Frenette
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
- Department of Chemistry, Université du Québec à Montréal, Case postale 8888, Succursale Centre-Ville, Montreal, Quebec H3C 3P8, Canada
| | - Cristina Mottillo
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
| | - Andrés M. Durantini
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional 36 Km 601, X5804BYA Río Cuarto, Córdoba, Argentina
| | - Jeff Gostick
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada
| | - Vjekoslav Štrukil
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
- Rud̵er Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Tomislav Friščić
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
- Rud̵er Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Centre for Applied Materials (QCAM), McGill University, 801 Sherbrooke Street W., Montreal, Quebec H3A 0B8, Canada
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10
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Greene LE, Lincoln R, Cosa G. Spatio-temporal monitoring of lipid peroxyl radicals in live cell studies combining fluorogenic antioxidants and fluorescence microscopy methods. Free Radic Biol Med 2018; 128:124-136. [PMID: 29649566 DOI: 10.1016/j.freeradbiomed.2018.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/05/2018] [Accepted: 04/06/2018] [Indexed: 12/28/2022]
Abstract
Lipid peroxidation of polyunsaturated fatty acids in cells may occur via their catalytic autoxidation through peroxyl radicals under oxidative stress conditions. Lipid peroxidation is related to a number of pathologies, and may be invoked in new forms of regulated cell death, yet it may also have beneficial roles in cell signaling cascades. Antioxidants are a natural line of defense against lipid peroxidation, and may accordingly impact the biological outcome associated with the redox chemistry of lipid peroxidation. Critical to unraveling the physiological and pathological role of lipid peroxidation is the development of novel probes with the partition, chemical sensitivity and more importantly, molecular specificity, enabling the spatial and temporal imaging of peroxyl radicals in the lipid membranes of live cells, reporting on the redox status of the cell membrane. This review describes our recent progress to visualize lipid peroxidation in model membrane systems and in live cell studies. Our work portrays the mechanistic insight leading to the development of a highly sensitive probe to monitor lipid peroxyl radicals (LOO•). It also describes technical aspects including reagents and fluorescence microscopy methodologies to consider in order to achieve the much sought after monitoring of rates of lipid peroxyl radical production in live cell studies, be it under oxidative stress but also under cell homeostasis. This review seeks to bring attention to the study of lipid redox reactions and to lay the groundwork for the adoption of fluorogenic antioxidant probeshancement and maximum intensity recorded in turn provide a benchmark to estimate, when compared to the control BODIPY dye lacking the intramolecular PeT based switch, the overall exte and related fluorescence microscopy methods toward gaining rich spatiotemporal information on lipid peroxidation in live cells.
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Affiliation(s)
- Lana E Greene
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
| | - Richard Lincoln
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8.
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11
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Wong FH, AbuArish A, Matthes E, Turner MJ, Greene LE, Cloutier A, Robert R, Thomas DY, Cosa G, Cantin AM, Hanrahan JW. Cigarette smoke activates CFTR through ROS-stimulated cAMP signaling in human bronchial epithelial cells. Am J Physiol Cell Physiol 2018; 314:C118-C134. [PMID: 28978522 PMCID: PMC5866379 DOI: 10.1152/ajpcell.00099.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/27/2017] [Accepted: 09/27/2017] [Indexed: 11/22/2022]
Abstract
Air pollution stimulates airway epithelial secretion through a cholinergic reflex that is unaffected in cystic fibrosis (CF), yet a strong correlation is observed between passive smoke exposure in the home and impaired lung function in CF children. Our aim was to study the effects of low smoke concentrations on cystic fibrosis transmembrane conductance regulator (CFTR) function in vitro. Cigarette smoke extract stimulated robust anion secretion that was transient, mediated by CFTR, and dependent on cAMP-dependent protein kinase activation. Secretion was initiated by reactive oxygen species (ROS) and mediated by at least two distinct pathways: autocrine activation of EP4 prostanoid receptors and stimulation of Ca2+ store-operated cAMP signaling. The response was absent in cells expressing the most common disease-causing mutant F508del-CFTR. In addition to the initial secretion, prolonged exposure of non-CF bronchial epithelial cells to low levels of smoke also caused a gradual decline in CFTR functional expression. F508del-CFTR channels that had been rescued by the CF drug combination VX-809 (lumacaftor) + VX-770 (ivacaftor) were more sensitive to this downregulation than wild-type CFTR. The results suggest that CFTR-mediated secretion during acute cigarette smoke exposure initially protects the airway epithelium while prolonged exposure reduces CFTR functional expression and reduces the efficacy of CF drugs.
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Affiliation(s)
- Francis H Wong
- Department of Physiology, McGill University , Montreal, Quebec , Canada
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
| | - Asmahan AbuArish
- Department of Physiology, McGill University , Montreal, Quebec , Canada
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
| | - Elizabeth Matthes
- Department of Physiology, McGill University , Montreal, Quebec , Canada
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
| | - Mark J Turner
- Department of Physiology, McGill University , Montreal, Quebec , Canada
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
| | - Lana E Greene
- Department of Chemistry, McGill University , Montreal, Quebec , Canada
| | - Alexandre Cloutier
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke , Sherbrooke, Quebec , Canada
| | - Renaud Robert
- Department of Physiology, McGill University , Montreal, Quebec , Canada
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
- Department of Biochemistry, McGill University , Montreal, Quebec , Canada
| | - David Y Thomas
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
- Department of Biochemistry, McGill University , Montreal, Quebec , Canada
| | - Gonzalo Cosa
- Department of Chemistry, McGill University , Montreal, Quebec , Canada
| | - André M Cantin
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke , Sherbrooke, Quebec , Canada
| | - John W Hanrahan
- Department of Physiology, McGill University , Montreal, Quebec , Canada
- Cystic Fibrosis Translational Research Centre, McGill University , Montreal, Quebec , Canada
- Research Institute of McGill Univ. Hospital Centre , Montreal, Quebec , Canada
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12
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Greene LE, Lincoln R, Cosa G. Rate of Lipid Peroxyl Radical Production during Cellular Homeostasis Unraveled via Fluorescence Imaging. J Am Chem Soc 2017; 139:15801-15811. [DOI: 10.1021/jacs.7b08036] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lana E. Greene
- Department of Chemistry and Centre
for Self Assembled Chemical Structures (CSACS/CRMAA), McGill University, 801
Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Richard Lincoln
- Department of Chemistry and Centre
for Self Assembled Chemical Structures (CSACS/CRMAA), McGill University, 801
Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Gonzalo Cosa
- Department of Chemistry and Centre
for Self Assembled Chemical Structures (CSACS/CRMAA), McGill University, 801
Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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13
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Koch A, Kumar S, Ravikanth M. Use of Wittig reaction for the synthesis of conjugated Aza-BODIPYs and their spectral and electrochemical properties. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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Gidi Y, Götte M, Cosa G. Conformational Changes Spanning Angstroms to Nanometers via a Combined Protein-Induced Fluorescence Enhancement-Förster Resonance Energy Transfer Method. J Phys Chem B 2017; 121:2039-2048. [PMID: 28177636 DOI: 10.1021/acs.jpcb.6b11495] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Förster resonance energy transfer (FRET)-based single-molecule techniques have revolutionized our understanding of conformational dynamics in biomolecular systems. Recently, a new single-molecule technique based on protein-induced fluorescence enhancement (PIFE) has aided studies in which minimal (<3 nm) displacements occur. Concerns have been raised regarding whether donor fluorophore intensity (and correspondingly fluorescence quantum yield Φf) fluctuations, intrinsic to PIFE methods, may adversely affect FRET studies when retrieving the donor-acceptor dye distance. Here, we initially show through revisions of Förster's original equation that distances may be calculated in FRET experiments regardless of protein-induced intensity (and Φf) fluctuations occurring in the donor fluorophore. We additionally demonstrate by an analysis of the recorded emission intensity and competing decay pathways that PIFE and FRET methods may be conveniently combined, providing parallel complementary information in a single experiment. Single-molecule studies conducted with Cy3- and ATTO647N-labeled RNA structures and the HCV-NS5B polymerase protein undergoing binding dynamics along the RNA backbone provide a case study to validate the results. The analysis behind the proposed method enables for PIFE and FRET changes to be disentangled when both FRET and PIFE fluctuate over time following protein arrival and, for example, sliding. A new method, intensity-FRET, is thus proposed to monitor conformational changes spanning from angstroms to nanometers.
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Affiliation(s)
- Yasser Gidi
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University , 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8
| | - Matthias Götte
- Department of Biochemistry and Department of Medical Microbiology and Immunology, University of Alberta , 6020K Katz Group Centre, Edmonton, Alberta, Canada T6G 2E1
| | - Gonzalo Cosa
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University , 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8
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15
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López J, de la Cruz FN, Flores-Conde MI, Flores-Álamo M, Delgado F, Tamariz J, Vázquez MA. Regioselective Multicomponent Synthesis of 2,4,6-Trisubstituted Phenols from Fischer Alkynyl Carbene Complexes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501211] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Kowada T, Maeda H, Kikuchi K. BODIPY-based probes for the fluorescence imaging of biomolecules in living cells. Chem Soc Rev 2016; 44:4953-72. [PMID: 25801415 DOI: 10.1039/c5cs00030k] [Citation(s) in RCA: 866] [Impact Index Per Article: 108.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fluorescence imaging techniques have been widely used to visualize biological molecules and phenomena. In particular, several studies on the development of small-molecule fluorescent probes have been carried out, because their fluorescence properties can be easily tuned by synthetic chemical modification. For this reason, various fluorescent probes have been developed for targeting biological components, such as proteins, peptides, amino acids, and ions, to the interior and exterior of cells. In this review, we cover advances in the development of 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based fluorescent probes for biological studies over the past decade.
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Affiliation(s)
- Toshiyuki Kowada
- Immunology Frontier Research Center (IFReC), Osaka University, Suita, Osaka 565-0871, Japan.
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17
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Durantini AM, Greene LE, Lincoln R, Martínez SR, Cosa G. Reactive Oxygen Species Mediated Activation of a Dormant Singlet Oxygen Photosensitizer: From Autocatalytic Singlet Oxygen Amplification to Chemicontrolled Photodynamic Therapy. J Am Chem Soc 2016; 138:1215-25. [DOI: 10.1021/jacs.5b10288] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Andrés M. Durantini
- Department
of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Lana E. Greene
- Department
of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Richard Lincoln
- Department
of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Sol R. Martínez
- Department
of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
- Instituto
Multidisciplinario de Biología Vegetal (IMBIV), CONICET, and
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
| | - Gonzalo Cosa
- Department
of Chemistry and Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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18
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Li B, Zheng F, Chauvin JPR, Pratt DA. The medicinal thiosulfinates from garlic and Petiveria are not radical-trapping antioxidants in liposomes and cells, but lipophilic analogs are. Chem Sci 2015; 6:6165-6178. [PMID: 30090232 PMCID: PMC6054074 DOI: 10.1039/c5sc02270c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 07/27/2015] [Indexed: 01/11/2023] Open
Abstract
The radical-trapping antioxidant (RTA) activities of allicin and petivericin, thiosulfinates widely believed responsible for the medicinal properties of garlic and Petiveria, were determined in phosphatidylcholine lipid bilayers and mammalian cell culture.
The radical-trapping antioxidant (RTA) activities of allicin and petivericin, thiosulfinates widely believed responsible for the medicinal properties of garlic and Petiveria, were determined in phosphatidylcholine lipid bilayers. The results indicate that both compounds are surprisingly ineffective, in sharp contrast with previous studies in organic solution which showed that they undergo facile Cope elimination to produce sulfenic acids – potent radical-trapping agents. In an effort to understand the medium dependence of this activity, a more lipophilic (hexylated) analog of petivericin was synthesized and shown to be among the most effective RTAs known, but only in the presence of a hydrophilic thiol (e.g. N-acetylcysteine). Additional symmetric and unsymmetric thiosulfinates were synthesized to shed light on the structural features that underlie this reactivity. These studies reveal that amphiphilic thiosulfinates which undergo S-thiolation with a hydrophilic thiol to give lipophilic sulfenic acids are required, and that an activated methylene group – key to promote Cope elimination – is not. Interestingly, the added thiol was also found to regenerate the sulfenic acid following its reaction with peroxyl radicals. This activity was diminished at more acidic pH, suggesting that it occurs by electron transfer from the thiolate. Allicin, petivericin and hexylated petivericin were assayed as inhibitors of lipid peroxidation in human TF1a erythroblasts and HEK-293 kidney cells, revealing similar efficacies in the low μM range – the same range in which allicin and petivericin were found to induce cell death concomitant with, or as a result of, glutathione (GSH) depletion. In contrast, hexylated petivericin was not cytotoxic throughout the concentration range assayed, and had no effect on GSH levels. Taken together, the results in lipid bilayers and in cell culture suggest that the greater lipophilicity of hexylated petivericin enables it to partition to membranous cell compartments where it forms a lipid-soluble sulfenic acid that traps peroxyl radicals, whereas allicin and petivericin partition to the cytosol where they deplete GSH and induce cell death.
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Affiliation(s)
- Bo Li
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie Curie Pvt. , Ottawa , Ontario , Canada . ; ; Tel: +1-613-562-5800 ext. 2119
| | - Feng Zheng
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie Curie Pvt. , Ottawa , Ontario , Canada . ; ; Tel: +1-613-562-5800 ext. 2119
| | - Jean-Philippe R Chauvin
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie Curie Pvt. , Ottawa , Ontario , Canada . ; ; Tel: +1-613-562-5800 ext. 2119
| | - Derek A Pratt
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie Curie Pvt. , Ottawa , Ontario , Canada . ; ; Tel: +1-613-562-5800 ext. 2119
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19
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Macia N, Heyne B. Using photochemistry to understand and control the production of reactive oxygen species in biological environments. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.03.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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20
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Lincoln R, Greene LE, Bain C, Flores-Rizo JO, Bohle DS, Cosa G. When Push Comes to Shove: Unravelling the Mechanism and Scope of Nonemissive meso-Unsaturated BODIPY Dyes. J Phys Chem B 2015; 119:4758-65. [PMID: 25751527 DOI: 10.1021/acs.jpcb.5b02080] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Richard Lincoln
- Department
of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
| | - Lana E. Greene
- Department
of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
| | - Cheryl Bain
- Department
of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
| | - Juan O. Flores-Rizo
- Department
of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
- Departamento
de Química, Universidad de Guanajuato, Col. Noria Alta S/N, Guanajuato, Gto 36050, Mexico
| | - D. Scott Bohle
- Department
of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
| | - Gonzalo Cosa
- Department
of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
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21
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Jouanno LA, Chevalier A, Sekkat N, Perzo N, Castel H, Romieu A, Lange N, Sabot C, Renard PY. Kondrat’eva Ligation: Diels–Alder-Based Irreversible Reaction for Bioconjugation. J Org Chem 2014; 79:10353-66. [DOI: 10.1021/jo501972m] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Laurie-Anne Jouanno
- Normandie Univ, COBRA, UMR 6014 & FR 3038; Univ Rouen; INSA Rouen; CNRS, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Arnaud Chevalier
- Normandie Univ, COBRA, UMR 6014 & FR 3038; Univ Rouen; INSA Rouen; CNRS, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Nawal Sekkat
- Section
des Sciences Pharmaceutiques, Université de Genève, Université de Lausanne, Quai Ernest Ansermet 30, CH-1211 Genève 4, Switzerland
| | - Nicolas Perzo
- Inserm
U982, Laboratory of Neuronal and Neuroendocrine Communication and
Differentiation (DC2N), Astrocyte and Vascular Niche, Institute of
Research and Biomedical Innovation (IRIB), PRES Normandy University, University of Rouen, 76821 Mont-Saint-Aignan Cedex, France
- North-West Cancéropole (CNO), 59008 Lille Cedex, France
| | - Hélène Castel
- Inserm
U982, Laboratory of Neuronal and Neuroendocrine Communication and
Differentiation (DC2N), Astrocyte and Vascular Niche, Institute of
Research and Biomedical Innovation (IRIB), PRES Normandy University, University of Rouen, 76821 Mont-Saint-Aignan Cedex, France
- North-West Cancéropole (CNO), 59008 Lille Cedex, France
| | - Anthony Romieu
- ICMUB,
UMR CNRS 6302, Université de Bourgogne, 9 Avenue Alain Savary, 21078 Dijon, France
- Institut Universitaire de France, 103 Boulevard Saint-Michel, 75005 Paris, France
| | - Norbert Lange
- Section
des Sciences Pharmaceutiques, Université de Genève, Université de Lausanne, Quai Ernest Ansermet 30, CH-1211 Genève 4, Switzerland
| | - Cyrille Sabot
- Normandie Univ, COBRA, UMR 6014 & FR 3038; Univ Rouen; INSA Rouen; CNRS, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
| | - Pierre-Yves Renard
- Normandie Univ, COBRA, UMR 6014 & FR 3038; Univ Rouen; INSA Rouen; CNRS, 1 rue Tesnière, 76821 Mont-Saint-Aignan Cedex, France
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22
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Godin R, Liu HW, Smith L, Cosa G. Dye lipophilicity and retention in lipid membranes: implications for single-molecule spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11138-11146. [PMID: 25158129 DOI: 10.1021/la5021669] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fluorescence studies of individual lipid vesicles rely on the proper positioning of probes in the lipid milieu. This is true for both positional tags and chemoselective fluorogenic probes that undergo chemical modification following reaction with an analyte of interest within the lipid environment. The present report describes lipophilicity and localization estimations for a series of BODIPY dyes bearing substituents of varying hydrophobicity. We also studied fluorogenic trap-reporter probes that undergo fluorescence emission enhancement upon trapping of reactive oxygen species (ROS), including lipid peroxyl radicals. We show that caution has to be taken to extrapolate ensemble partition measurements of dyes to the single-molecule regime as a result of the dramatically different lipid concentration prevailing in ensemble versus single-molecule experiments. We show that the mole fraction of dyes that remains embedded in liposomes during a typical single-molecule experiment may be accurately determined from a ratiometric single-particle imaging analysis. We further demonstrate that fluorescence correlation spectroscopy (FCS) provides a very rapid and reliable estimate of the lipophilic nature of a given dye under highly dilute single-molecule-like conditions. Our combined single-particle spectroscopy and FCS experiments suggest that the minimal mole fraction of membrane-associated dyes (x(m)) as determined from FCS experiments is about 0.5 for adequate dye retention during single-molecule imaging in lipid membranes. Our work further highlights the dramatic effect that chemical modifications can have on chemoselective fluorogenic probe localization.
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Affiliation(s)
- Robert Godin
- Department of Chemistry and Centre for Self-Assembled Chemical Structures (CSACS/CRMAA), McGill University , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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23
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Lincoln R, Greene LE, Krumova K, Ding Z, Cosa G. Electronic Excited State Redox Properties for BODIPY Dyes Predicted from Hammett Constants: Estimating the Driving Force of Photoinduced Electron Transfer. J Phys Chem A 2014; 118:10622-30. [PMID: 25066755 DOI: 10.1021/jp5059148] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Richard Lincoln
- Department of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Lana E. Greene
- Department of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Katerina Krumova
- Department of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Zhutian Ding
- Department of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Gonzalo Cosa
- Department of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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24
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Godin R, Liu HW, Cosa G. Ambient condition oxidation in individual liposomes observed at the single molecule level. Chem Sci 2014. [DOI: 10.1039/c4sc00033a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A ratiometric method based on a fluorogenic α-tocopherol analogue reveals oxidation occurring under ambient conditions during liposome preparation.
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Affiliation(s)
- Robert Godin
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS/CRMAA)
- McGill University
- Montreal, Canada
| | - Hsiao-Wei Liu
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS/CRMAA)
- McGill University
- Montreal, Canada
| | - Gonzalo Cosa
- Department of Chemistry and Center for Self-Assembled Chemical Structures (CSACS/CRMAA)
- McGill University
- Montreal, Canada
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25
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Lai YC, Su SY, Chang CC. Special reactive oxygen species generation by a highly photostable BODIPY-based photosensitizer for selective photodynamic therapy. ACS APPLIED MATERIALS & INTERFACES 2013; 5:12935-12943. [PMID: 24313397 DOI: 10.1021/am403593m] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We introduce a new class of photostable, efficient photosensitizers based on boron-dipyrromethene (BODIPY) derivatives that can generate singlet oxygen and super oxide simultaneously under irradiation. For compound preparation, appropriate regulation of the reaction conditions and control of specifically substituted BODIPY derivatives have been achieved. After biologically evaluating the intracellular uptake, localization, and phototoxicity of the compounds, we conclude that 3,5-dianiline-substituted BODIPY is a potentially selective photodynamic therapy candidate because its photodamage is more efficient in cancer cells than in normal cells, without apparent dark toxicity. Furthermore, direct comparison of photodamage efficacy revealed that our compound has better efficacy than Foscan and nearly equal efficacy to that of methylene blue.
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Affiliation(s)
- Yen-Chih Lai
- Graduate Institute of Biomedical Engineering, National Chung Hsing University , 250 Kuo Kuang Road, Taichung, 402, Taiwan, R.O.C
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26
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Structural effects on the hesperidin properties obtained by chelation to magnesium complexes. J Inorg Biochem 2013; 129:35-42. [DOI: 10.1016/j.jinorgbio.2013.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 08/07/2013] [Accepted: 08/07/2013] [Indexed: 02/05/2023]
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27
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Krumova K, Greene LE, Cosa G. Fluorogenic α-Tocopherol Analogue for Monitoring the Antioxidant Status within the Inner Mitochondrial Membrane of Live Cells. J Am Chem Soc 2013; 135:17135-43. [DOI: 10.1021/ja408227f] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Katerina Krumova
- Department
of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Lana E. Greene
- Department
of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Gonzalo Cosa
- Department
of Chemistry and
Center for Self-Assembled Chemical Structures (CSACS-CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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28
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Flores-Rizo JO, Esnal I, Osorio-Martínez CA, Gómez-Durán CFA, Bañuelos J, López Arbeloa I, Pannell KH, Metta-Magaña AJ, Peña-Cabrera E. 8-Alkoxy- and 8-aryloxy-BODIPYs: straightforward fluorescent tagging of alcohols and phenols. J Org Chem 2013; 78:5867-77. [PMID: 23721096 DOI: 10.1021/jo400417h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We demonstrate herein that both alcohols and phenols can be tagged with a BODIPY (borondipyrromethene) moiety to yield highly fluorescent products. Thus, 8-(methylthio)-BODIPY (1) undergoes an S(N)Ar-type reaction with a host of alcohols and phenols in the presence of a base and a Cu(I) additive. The BODIPY dyes bearing alkoxy or nonfunctionalized phenoxy moieties are characterized by a highly efficient fluorescence emission, regardless of the media, in the blue-green part of the visible region. Complementary to this, the presence of electron-donor groups at the aryl ring leads to an intramolecular charge-transfer process, which quenches the fluorescence mainly in polar media. In addition to simple alcohols and phenols, four natural products (eugenol, menthol, cholesterol, and estrone) were labeled in a simple fashion. X-ray structures of the cholesterol and estrone derivatives are discussed. In fact, the BODIPY bearing cholesterol stands out as a bright fluorescence biological marker.
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Affiliation(s)
- Juan O Flores-Rizo
- Departamento de Quı́mica, Universidad de Guanajuato, Col. Noria Alta S/N, Guanajuato, Gto. 36050, Mexico
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Li B, Harjani JR, Cormier NS, Madarati H, Atkinson J, Cosa G, Pratt DA. Besting Vitamin E: Sidechain Substitution is Key to the Reactivity of Naphthyridinol Antioxidants in Lipid Bilayers. J Am Chem Soc 2013; 135:1394-405. [DOI: 10.1021/ja309153x] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Li
- Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Jitendra R. Harjani
- Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Nicholas S. Cormier
- Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Hasam Madarati
- Department of Chemistry and
Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Jeffrey Atkinson
- Department of Chemistry and
Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Gonzalo Cosa
- Department of Chemistry and Centre
for Self-Assembled Chemical Structures, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8 Canada
| | - Derek A. Pratt
- Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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Zheng F, Pratt DA. Antioxidant generation and regeneration in lipid bilayers: the amazing case of lipophilic thiosulfinates and hydrophilic thiols. Chem Commun (Camb) 2013; 49:8181-3. [DOI: 10.1039/c3cc44401e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Jun T, Kim K, Lee KM, Benniston AC, Churchill DG. Meso-thienyl and furyl rotor effects in BF2-chelated dipyrrin dyes: solution spectroscopic studies and X-ray structural packing analysis of isomer and congener effects. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.740023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Taehong Jun
- a Department of Chemistry , Korea Advanced Institute of Science and Technology 373-1 Guseong-dong , Yuseong-gu , Daejeon 305-701 , Republic of Korea
| | - Kibong Kim
- a Department of Chemistry , Korea Advanced Institute of Science and Technology 373-1 Guseong-dong , Yuseong-gu , Daejeon 305-701 , Republic of Korea
| | - Kang Mun Lee
- a Department of Chemistry , Korea Advanced Institute of Science and Technology 373-1 Guseong-dong , Yuseong-gu , Daejeon 305-701 , Republic of Korea
| | - Andrew C. Benniston
- b Molecular Photonics Laboratory , School of Chemistry, Newcastle University , Newcastle-upon-Tyne, NE1 7RU , UK
| | - David G. Churchill
- a Department of Chemistry , Korea Advanced Institute of Science and Technology 373-1 Guseong-dong , Yuseong-gu , Daejeon 305-701 , Republic of Korea
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32
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Krumova K, Friedland S, Cosa G. How lipid unsaturation, peroxyl radical partitioning, and chromanol lipophilic tail affect the antioxidant activity of α-tocopherol: direct visualization via high-throughput fluorescence studies conducted with fluorogenic α-tocopherol analogues. J Am Chem Soc 2012; 134:10102-13. [PMID: 22568598 DOI: 10.1021/ja301680m] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The preparation of two highly sensitive fluorogenic α-tocopherol (TOH) analogues which undergo >30-fold fluorescence intensity enhancement upon reaction with peroxyl radicals is reported. The probes consist of a chromanol moiety coupled to the meso position of a BODIPY fluorophore, where the use of a methylene linker (BODIPY-2,2,5,7,8-pentamethyl-6-hydroxy-chroman adduct, H(2)B-PMHC) vs an ester linker (meso-methanoyl BODIPY-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid, H(2)B-TOH) enables tuning their reactivity toward H-atom abstraction by peroxyl radicals. The development of a high-throughput fluorescence assay for monitoring kinetics of peroxyl radical reactions in liposomes is subsequently described where the evolution of the fluorescence intensity over time provides a rapid, facile method to conduct competitive kinetic studies in the presence of TOH and its analogues. A quantitative treatment is formulated for the temporal evolution of the intensity in terms of relative rate constants of H-atom abstraction (k(inh)) from the various tocopherol analogues. Combined, the new probes, the fluorescence assay, and the data analysis provide a new method to obtain, in a rapid, parallel format, relative antioxidant activities in phospholipid membranes. The method is exemplified with four chromanol-based antioxidant compounds differing in their aliphatic tails (TOH, PMHC, H(2)B-PMHC, and H(2)B-TOH). Studies were conducted in six different liposome solutions prepared from poly- and mono-unsaturated and saturated (fluid vs gel phase) lipids in the presence of either hydrophilic or lipophilic peroxyl radicals. A number of key insights into the chemistry of the TOH antioxidants in lipid membranes are provided: (1) The relative antioxidant activities of chromanols in homogeneous solution, arising from their inherent chemical reactivity, readily translate to the microheterogeneous environment at the water/lipid interface; thus similar values for k(inh)(H(2)B-PMHC)/k(inh)(H(2)B-TOH) in the range of 2-3 are recorded both in homogeneous solution and in liposome suspensions with hydrophilic or lipophilic peroxyl radicals. (2) The relative antioxidant activity between tocopherol analogues with the same inherent chemical reactivity but bearing short (PMHC) or long (TOH) aliphatic tails, k(inh)(PMHC)/k(inh)(TOH), is ~8 in the presence of hydrophilic peroxyl radicals, regardless of the nature of the lipid membrane into which they are embedded. (3) Antioxidants embedded in saturated lipids do not efficiently scavenge hydrophilic peroxyl radicals; under these conditions wastage reactions among peroxyl radicals become important, and this translates into larger times for antioxidant consumption. (4) Lipophilic peroxyl radicals show reduced discrimination between antioxidants bearing long and short aliphatic tails, with k(inh)(PMHC)/k(inh)(TOH) in the range of 3-4 for most lipid membranes. (5) Lipophilic peroxyl radicals are scavenged with the same efficiency by all four antioxidants studied, regardless of the nature of their aliphatic tail or the lipid membrane into which they are embedded. These data underpin the key role the lipid environment plays in modulating the rate of reaction of antioxidants characterized by similar inherent chemical reactivity (arising from a conserved chromanol moiety) but differing in their membrane mobility (structural differences in the lipophilic tail). Altogether, a novel, facile method of study, new insights, and a quantitative understanding on the critical role of lipid diversity in modulating antioxidant activity in the lipid milieu are reported.
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Affiliation(s)
- Katerina Krumova
- Department of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
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Uppal T, Hu X, Fronczek FR, Maschek S, Bobadova-Parvanova P, Vicente MGH. Synthesis, Computational Modeling, and Properties of Benzo-Appended BODIPYs. Chemistry 2012; 18:3893-905. [PMID: 22367756 DOI: 10.1002/chem.201103002] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Timsy Uppal
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
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34
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Suzuki S, Kozaki M, Nozaki K, Okada K. Recent progress in controlling photophysical processes of donor–acceptor arrays involving perylene diimides and boron-dipyrromethenes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2011. [DOI: 10.1016/j.jphotochemrev.2011.10.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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35
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Borozenko O, Godin R, Lau KL, Mah W, Cosa G, Skene WG, Giasson S. Monitoring in Real-Time the Degrafting of Covalently Attached Fluorescent Polymer Brushes Grafted to Silica Substrates—Effects of pH and Salt. Macromolecules 2011. [DOI: 10.1021/ma2013755] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olga Borozenko
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Robert Godin
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - Kai Lin Lau
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - Wayne Mah
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - Gonzalo Cosa
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - W. G. Skene
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Suzanne Giasson
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
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36
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Yu C, Jiao L, Yin H, Zhou J, Pang W, Wu Y, Wang Z, Yang G, Hao E. α-/β-Formylated Boron-Dipyrrin (BODIPY) Dyes: Regioselective Syntheses and Photophysical Properties. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100736] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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37
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Jiao L, Liu M, Zhang M, Yu C, Wang Z, Hao E. Visual and Colorimetric Detection of Cyanide Anion Based on a “Turn-off” Daylight Fluorescent Molecule. CHEM LETT 2011. [DOI: 10.1246/cl.2011.623] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Krumova K, Cosa G. Bodipy dyes with tunable redox potentials and functional groups for further tethering: preparation, electrochemical, and spectroscopic characterization. J Am Chem Soc 2010; 132:17560-9. [PMID: 21090723 DOI: 10.1021/ja1075663] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation, spectroscopic, and electrochemical characterization of a family of 16 new bodipy dyes with tunable redox potentials and versatile functional groups is reported. Electron-withdrawing or -donating groups (Et, H, Cl, or CN) at positions C2 and C6 enabled tuning the redox potentials within a ca. 0.7 eV window without significantly affecting either the HOMO-LUMO gap or the absorption and emission spectra. Hydroxymethyl or formyl groups at the meso (C8) position in turn provided a handle for covalent tethering to receptors and biomolecules of interest, which dispenses with the more commonly used meso-aryl moiety as a means to tag molecules. The dyes can thus be coupled to both electrophiles and nucleophiles. Importantly, it is shown that meso-formyl bodipy dyes are nonemissive and have significantly lower molar extinction coefficients compared to their meso-hydroxymethyl and meso-acetoxymethyl counterparts (which in turn are bright, with emission quantum yields in the range of 0.7-1). The nonemissive meso-formyl bodipy dyes thus provide unique opportunities as fluorogenic probes of nucleophilic attack and as fluorescent labeling agents where uncoupled fluorophores will not contribute to the fluorescence background. Overall, the new bodipy dyes reported here are promising candidates for the preparation of fluorescent sensors relying on photoinduced electron transfer and may find use in a number of fluorescent-labeling protocols.
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Affiliation(s)
- Katerina Krumova
- Department of Chemistry and Center for Self Assembled Chemical Structures, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
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39
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Atkinson J, Harroun T, Wassall SR, Stillwell W, Katsaras J. The location and behavior of alpha-tocopherol in membranes. Mol Nutr Food Res 2010; 54:641-51. [PMID: 20166146 DOI: 10.1002/mnfr.200900439] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Vitamin E (alpha-tocopherol) has long been recognized as the major antioxidant in biological membranes, and yet many structurally related questions persist of how the vitamin functions. For example, the very low levels of alpha-tocopherol reported for whole cell extracts question how this molecule can successfully protect the comparatively enormous quantities of PUFA-containing phospholipids found in membranes that are highly susceptible to oxidative attack. The contemporary realization that membranes laterally segregate into regions of distinct lipid composition (domains), we propose, provides the answer. We hypothesize alpha-tocopherol partitions into domains that are enriched in polyunsaturated phospholipids, amplifying the concentration of the vitamin in the place where it is most needed. These highly disordered domains depleted in cholesterol are analogous, but organizationally antithetical, to the well-studied lipid rafts. We review here the ideas that led to our hypothesis. Experimental evidence in support of the formation of PUFA-rich domains in model membranes is presented, focusing upon docosahexaenoic acid that is the most unsaturated fatty acid commonly found. Physical methodologies are then described to elucidate the nature of the interaction of alpha-tocopherol with PUFA and to establish that the vitamin and PUFA-containing phospholipids co-localize in non-raft domains.
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Affiliation(s)
- Jeffrey Atkinson
- Department of Chemistry, Brock University, St. Catharines, Ont., Canada.
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40
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Jiao L, Yu C, Liu M, Wu Y, Cong K, Meng T, Wang Y, Hao E. Synthesis and Functionalization of Asymmetrical Benzo-Fused BODIPY Dyes. J Org Chem 2010; 75:6035-8. [PMID: 20690775 DOI: 10.1021/jo101164a] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lijuan Jiao
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Changjiang Yu
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Mingming Liu
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Yangchun Wu
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Kebing Cong
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Ting Meng
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Yuqing Wang
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Erhong Hao
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu, 241000, China
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41
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Jiao L, Yu C, Uppal T, Liu M, Li Y, Zhou Y, Hao E, Hu X, Vicente MGH. Long wavelength red fluorescent dyes from 3,5-diiodo-BODIPYs. Org Biomol Chem 2010; 8:2517-9. [DOI: 10.1039/c001068e] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Jiao L, Yu C, Li J, Wang Z, Wu M, Hao E. β-Formyl-BODIPYs from the Vilsmeier−Haack Reaction. J Org Chem 2009; 74:7525-8. [DOI: 10.1021/jo901407h] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lijuan Jiao
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, China
| | - Changjiang Yu
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, China
| | - Jilong Li
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, China
| | - Zhaoyun Wang
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, China
| | - Min Wu
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, China
| | - Erhong Hao
- Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Material Science, and Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, China
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43
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Khatchadourian A, Krumova K, Boridy S, Ngo AT, Maysinger D, Cosa G. Molecular Imaging of Lipid Peroxyl Radicals in Living Cells with a BODIPY−α-Tocopherol Adduct. Biochemistry 2009; 48:5658-68. [DOI: 10.1021/bi900402c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Armen Khatchadourian
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - Katerina Krumova
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6
| | - Sebastien Boridy
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - An Thien Ngo
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - Gonzalo Cosa
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6
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