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Paolino M, de Candia M, Purgatorio R, Catto M, Saletti M, Tondo AR, Nicolotti O, Cappelli A, Brizzi A, Mugnaini C, Corelli F, Altomare CD. Investigation on Novel E/Z 2-Benzylideneindan-1-One-Based Photoswitches with AChE and MAO-B Dual Inhibitory Activity. Molecules 2023; 28:5857. [PMID: 37570828 PMCID: PMC10421270 DOI: 10.3390/molecules28155857] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/22/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023] Open
Abstract
The multitarget therapeutic strategy, as opposed to the more traditional 'one disease-one target-one drug', may hold promise in treating multifactorial neurodegenerative syndromes, such as Alzheimer's disease (AD) and related dementias. Recently, combining a photopharmacology approach with the multitarget-directed ligand (MTDL) design strategy, we disclosed a novel donepezil-like compound, namely 2-(4-((diethylamino)methyl)benzylidene)-5-methoxy-2,3-dihydro-1H-inden-1-one (1a), which in the E isomeric form (and about tenfold less in the UV-B photo-induced isomer Z) showed the best activity as dual inhibitor of the AD-related targets acetylcholinesterase (AChE) and monoamine oxidase B (MAO-B). Herein, we investigated further photoisomerizable 2-benzylideneindan-1-one analogs 1b-h with the unconjugated tertiary amino moiety bearing alkyls of different bulkiness and lipophilicity. For each compound, the thermal stable E geometric isomer, along with the E/Z mixture as produced by UV-B light irradiation in the photostationary state (PSS, 75% Z), was investigated for the inhibition of human ChEs and MAOs. The pure E-isomer of the N-benzyl(ethyl)amino analog 1h achieved low nanomolar AChE and high nanomolar MAO-B inhibition potencies (IC50s 39 and 355 nM, respectively), whereas photoisomerization to the Z isomer (75% Z in the PSS mixture) resulted in a decrease (about 30%) of AChE inhibitory potency, and not in the MAO-B one. Molecular docking studies were performed to rationalize the different E/Z selectivity of 1h toward the two target enzymes.
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Affiliation(s)
- Marco Paolino
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, I-53100 Siena, Italy; (M.P.); (M.S.); (A.C.); (A.B.); (C.M.); (F.C.)
| | - Modesto de Candia
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, I-70125 Bari, Italy; (M.d.C.); (R.P.); (M.C.); (A.R.T.); (O.N.)
| | - Rosa Purgatorio
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, I-70125 Bari, Italy; (M.d.C.); (R.P.); (M.C.); (A.R.T.); (O.N.)
| | - Marco Catto
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, I-70125 Bari, Italy; (M.d.C.); (R.P.); (M.C.); (A.R.T.); (O.N.)
| | - Mario Saletti
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, I-53100 Siena, Italy; (M.P.); (M.S.); (A.C.); (A.B.); (C.M.); (F.C.)
| | - Anna Rita Tondo
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, I-70125 Bari, Italy; (M.d.C.); (R.P.); (M.C.); (A.R.T.); (O.N.)
| | - Orazio Nicolotti
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, I-70125 Bari, Italy; (M.d.C.); (R.P.); (M.C.); (A.R.T.); (O.N.)
| | - Andrea Cappelli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, I-53100 Siena, Italy; (M.P.); (M.S.); (A.C.); (A.B.); (C.M.); (F.C.)
| | - Antonella Brizzi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, I-53100 Siena, Italy; (M.P.); (M.S.); (A.C.); (A.B.); (C.M.); (F.C.)
| | - Claudia Mugnaini
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, I-53100 Siena, Italy; (M.P.); (M.S.); (A.C.); (A.B.); (C.M.); (F.C.)
| | - Federico Corelli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, I-53100 Siena, Italy; (M.P.); (M.S.); (A.C.); (A.B.); (C.M.); (F.C.)
| | - Cosimo D. Altomare
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, I-70125 Bari, Italy; (M.d.C.); (R.P.); (M.C.); (A.R.T.); (O.N.)
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Paolino M, Rullo M, Maramai S, de Candia M, Pisani L, Catto M, Mugnaini C, Brizzi A, Cappelli A, Olivucci M, Corelli F, Altomare CD. Design, synthesis and biological evaluation of light-driven on-off multitarget AChE and MAO-B inhibitors. RSC Med Chem 2022; 13:873-883. [PMID: 35923722 PMCID: PMC9298480 DOI: 10.1039/d2md00042c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/19/2022] [Indexed: 08/13/2023] Open
Abstract
Neurodegenerative diseases are multifactorial disorders characterized by protein misfolding, oxidative stress, and neuroinflammation, finally resulting in neuronal loss and cognitive dysfunctions. Nowadays, an attractive strategy to improve the classical treatments is the development of multitarget-directed molecules able to synergistically interact with different enzymes and/or receptors. In addition, an interesting tool to refine personalized therapies may arise from the use of bioactive species able to modify their activity as a result of light irradiation. To this aim, we designed and synthesized a small library of cinnamic acid-inspired isomeric compounds with light modulated activity able to inhibit acetylcholinesterase (AChE) and monoamine oxidase B (MAO-B), with remarkable selectivity over butyrylcholinesterase (BChE) and MAO-A, which have been investigated as the enzyme targets related to Alzheimer's disease (AD). The inhibitory activities were evaluated for the pure E-diastereomers and the E/Z-diastereomer mixtures, obtained upon UV irradiation. Molecular docking studies were carried out to rationalize the differences in the inhibition potency of the E and Z diastereomers of the best performing analogue 1c. Our preliminary findings may open-up the way for developing innovative multitarget photo-switch drugs against neurodegenerative diseases.
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Affiliation(s)
- Marco Paolino
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
| | - Mariagrazia Rullo
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro Via E. Orabona 4 70125 Bari Italy
| | - Samuele Maramai
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
| | - Modesto de Candia
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro Via E. Orabona 4 70125 Bari Italy
| | - Leonardo Pisani
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro Via E. Orabona 4 70125 Bari Italy
| | - Marco Catto
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro Via E. Orabona 4 70125 Bari Italy
| | - Claudia Mugnaini
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
| | - Antonella Brizzi
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
| | - Andrea Cappelli
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
| | - Massimo Olivucci
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
- Chemistry Department, Bowling Green State University USA
| | - Federico Corelli
- Dipartimento di Biotecnologie, Chimica e Farmacia (Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena Via A. Moro 2 53100 Siena Italy
| | - Cosimo D Altomare
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro Via E. Orabona 4 70125 Bari Italy
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Tassone G, Paolino M, Pozzi C, Reale A, Salvini L, Giorgi G, Orlandini M, Galvagni F, Mangani S, Yang X, Carlotti B, Ortica F, Latterini L, Olivucci M, Cappelli A. Xanthopsin-Like Systems via Site-Specific Click-Functionalization of a Retinoic Acid Binding Protein. Chembiochem 2022; 23:e202100449. [PMID: 34647400 PMCID: PMC8934143 DOI: 10.1002/cbic.202100449] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/12/2021] [Indexed: 01/07/2023]
Abstract
The use of light-responsive proteins to control both living or synthetic cells, is at the core of the expanding fields of optogenetics and synthetic biology. It is thus apparent that a richer reaction toolbox for the preparation of such systems is of fundamental importance. Here, we provide a proof-of-principle demonstration that Morita-Baylis-Hillman adducts can be employed to perform a facile site-specific, irreversible and diastereoselective click-functionalization of a lysine residue buried into a lipophilic binding pocket and yielding an unnatural chromophore with an extended π-system. In doing so we effectively open the path to the in vitro preparation of a library of synthetic proteins structurally reminiscent of xanthopsin eubacterial photoreceptors. We argue that such a library, made of variable unnatural chromophores inserted in an easy-to-mutate and crystallize retinoic acid transporter, significantly expand the scope of the recently introduced rhodopsin mimics as both optogenetic and "lab-on-a-molecule" tools.
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Affiliation(s)
- Giusy Tassone
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Marco Paolino
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Cecilia Pozzi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Annalisa Reale
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Laura Salvini
- Toscana Life Sciences Foundation, Via Fiorentina 1, 53100, Siena, Italy
| | - Gianluca Giorgi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Maurizio Orlandini
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Federico Galvagni
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Stefano Mangani
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
| | - Xuchun Yang
- Chemistry Department, Bowling Green State University, Overman Hall, Bowling Green, OH 43403, USA
| | - Benedetta Carlotti
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | - Fausto Ortica
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | - Loredana Latterini
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123, Perugia, Italy
| | - Massimo Olivucci
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
- Chemistry Department, Bowling Green State University, Overman Hall, Bowling Green, OH 43403, USA
| | - Andrea Cappelli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Dipartimento di Eccellenza 2018-2022), Università degli Studi di Siena, Via A. Moro 2, 53100, Siena, Italy
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Speranza S, Knechtl R, Witlaczil R, Schönlechner R. Reversed-Phase HPLC Characterization and Quantification and Antioxidant Capacity of the Phenolic Acids and Flavonoids Extracted From Eight Varieties of Sorghum Grown in Austria. FRONTIERS IN PLANT SCIENCE 2021; 12:769151. [PMID: 34812260 PMCID: PMC8604811 DOI: 10.3389/fpls.2021.769151] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 09/30/2021] [Indexed: 06/06/2023]
Abstract
Sorghum is raising great interest as a grain for the future, for its agricultural advantages in times of climate change, and for the positive impact of its bioactive compounds on human health. These compounds comprise phenolic acids, in a free, conjugated, and bound form, and flavonoids. The most commonly used extraction methods require high volumes of chemicals and are non-practical when handling many samples at a time. The main aim of this study was to develop a microscale extraction procedure for both phenolic acids and flavonoids to improve yield and diversity, labor time, and chemicals usage. The improved protocols allowed to perform the extraction in 2-ml safe-lock tubes using around 60 times less chemical volume for phenolic acids and 6 times less for flavonoids. In addition, compared to the macroscale method, the microscale approach was effective in extracting a comparable amount of phenolic acids (between 0.99 and 1.57 mg ferulic acid/g) and even a higher quantity of flavonoids (between 1.10 and 2.24 mg ferulic acid/g). With the established methods, phenolic compounds were extracted from eight varieties of sorghum grown in Austria, previously shown to be promising for food processing. In all sorghum varieties, protocatechuic, vanillic, caffeic, syringic, P-coumaric, and ferulic acids were detected in free, conjugated and bound form, with the last being the most abundant. Arsky and Icebergg varieties presented the lowest (922.65 μg/g) and the highest (1,269.28 μg/g) levels of total phenolic acids, respectively, recorded using high-performance liquid chromatography (HPLC). Flavonoids, comprising luteolinidin, apigenidin, naringenin, apigenin, 5-methoxy-luteolinidin (5-MetO-Lut), and 7-methoxy-apigeninidin (7-MetO-Api), were detected in amounts between 27.03 (Kalatur variety) and 87.52 μg/g (Huggo variety). The red varieties, Huggo, Armorik, and Arsky, had the highest antioxidant activity measured as 2,2-Diphenyl-1-picrylhydrazyl (DPPH) [around 5.00 μg Trolox equivalent (TE)/g] and Azino-bis(3-ehtylbenzthiazoline-6-sulfonic acid) (ABTS) (around 3.00 μg TE/g) scavenging capacity for both phenolic acids and flavonoids. Ferric reducing antioxidant power (FRAP) was the highest for the phenolic acids extracted from a white Ggolden variety.
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Mukherjee M, Mandal P, Patra D, Pal D, Shunmugam R, Chattopadhyay D. A unique twisted rod‐like pattern due to π‐π stacking induced host‐guest self‐assembly. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Madhumita Mukherjee
- Department of Polymer Science and Technology University of Calcutta Kolkata India
| | - Piyali Mandal
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Nadia India
| | - Diptendu Patra
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Nadia India
| | - Dwaipayan Pal
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Nadia India
| | - Raja Shunmugam
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Nadia India
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Timár Z, Varga G, Szabados M, Csankó K, Alapi T, Forano C, Prevot V, Sipos P, Pálinkó I. Structural insight into the photoinduced E→Z isomerisation of cinnamate embedded in ZnAl and MgAl layered double hydroxides. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Rodríguez RB, Zapata RL, Salum ML, Erra-Balsells R. Understanding the role played by protic ionic liquids (PILs) and the substituent effect for enhancing the generation of Z-cinnamic acid derivatives†. Photochem Photobiol Sci 2020; 19:819-830. [PMID: 33856671 DOI: 10.1039/d0pp00072h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/30/2020] [Indexed: 11/21/2022]
Abstract
Photoisomerization of a series of substituted E-cinnamic acids in MeCN in their acid forms and as their corresponding protic ionic liquids (PILs) with light of 300 nm is studied. The nature, strength, number, and position effects of substituents on the photochemical behavior of E-cinnamic derivatives are investigated. The photosensitization of the reaction in the presence of Michler's ketone is also studied at 366 nm and it demonstrates that the triplet-excited state is involved in the reaction. As the presence of n-butylamine needed to form the PILs significantly increases the photoproduct yields in all cases, the role of the PILs is also discussed. Thus, understanding of these fundamental aspects has allowed us to establish an excellent and practical synthetic protocol for successfully synthesizing Z-cinnamic acids.
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Affiliation(s)
- Rocío B Rodríguez
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
- Design and Chemistry of Macromolecules Group, Institute of Technology in Polymers and Nanotechnology (ITPN), UBA-CONICET, FADU, University of Buenos Aires, Intendente Güiraldes 2160, Pabellón III, subsuelo, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina
| | - Ramiro L Zapata
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
| | - María L Salum
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina.
- CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR). Facultad de Ciencias Exactas y Naturales Pabellón II, 3er P. Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina.
| | - Rosa Erra-Balsells
- Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica. Pabellón II, 3er P., Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
- CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR). Facultad de Ciencias Exactas y Naturales Pabellón II, 3er P. Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
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Molecular recognition: Evidence of the redox role of ferrocenyl-imine derivatives in the presence of copper (II) ions. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Schmidt De León T, Salum ML, Erra-Balsells R. norHarmane containing ionic liquid matrices for low molecular weight MALDI-MS carbohydrate analysis: The perfect couple with α-cyano-4-hydroxycinnamic acid. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:643-654. [PMID: 31113009 DOI: 10.1002/jms.4375] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 05/09/2019] [Accepted: 05/13/2019] [Indexed: 06/09/2023]
Abstract
Cinnamic acid derivatives, particularly α-cyano-4-hydroxycinnamic acid (E-α-cyano-4-hydroxycinnamic acid or (E)-2-cyano-3-(4-hydroxyphenyl)prop-2-enoate; CHCA), have been extensively used especially for protein and peptide analysis. Together with the introduction of ionic liquid MALDI matrix (ILM) started the study of applications of IL prepared with CHCA and a counter organic base (ie, aliphatic amines) in which CHCA moiety is the chromophore responsible of UV-laser absorption. Despite the extensive studies of norharmane (9H-pyrido[3,4-b]indole; nHo) applications as matrix and its peculiar basic properties in the ground and electronic excited state, nHo containing ILM was never tested in MALDI-MS experiments. This pyrido-indole compound was introduced as MALDI matrix 22 years ago for different applications including low molecular weight (LMW) carbohydrates (neutral, acidic, and basic carbohydrates). These facts encouraged us to use it as a base, for the first time, for ILM preparation. As a rational design of new IL MALDI matrices, E-α-cyanocinnamic acid.nHo and E-cinnamic acid.nHo were prepared and their properties as matrices studied. Their performance was compared with that of (a) the corresponding IL prepared with butylamine as basic component, (b) the corresponding crystalline E-α-cyanocinnamic and E-cinnamic acid, and (c) the classical crystalline matrices (2,5-dihydroxybenzoic acid, DHB; nHo) used in the analysis of neutral/sulfated carbohydrates. The IL DHB.nHo was tested, too. Herein, we demonstrate the outstanding performance for the IL CHCA.nHo for LMW carbohydrate in positive and negative ion mode (linear and reflectron modes). Sulfated oligosaccharides were detected in negative ion mode, and although the dissociation of sulfate groups was not completely suppressed the relative intensity (RI) of [M - Na]- peak was quite high. Additionally, to better understand the quite different performance of each IL tested as matrix, the physical and morphological properties in solid state were studied (optical image; MS image).
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Affiliation(s)
- Tobías Schmidt De León
- Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica, Universidad de Buenos Aires, Pabellón II, 3er P., Ciudad Universitaria, 1428, Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales Pabellón II, CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR), 3er P. Ciudad Universitaria, 1428, Buenos Aires, Argentina
| | - María L Salum
- Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica, Universidad de Buenos Aires, Pabellón II, 3er P., Ciudad Universitaria, 1428, Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales Pabellón II, CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR), 3er P. Ciudad Universitaria, 1428, Buenos Aires, Argentina
| | - Rosa Erra-Balsells
- Facultad de Ciencias Exactas y Naturales. Departamento de Química Orgánica, Universidad de Buenos Aires, Pabellón II, 3er P., Ciudad Universitaria, 1428, Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales Pabellón II, CONICET, Universidad de Buenos Aires. Centro de Investigación en Hidratos de Carbono (CIHIDECAR), 3er P. Ciudad Universitaria, 1428, Buenos Aires, Argentina
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Investigation on the interactions of E -4-methoxycinnamic acid with solvent: Solvatochromism, electric dipole moment and pH effect. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.11.136] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Haenle JC, Bruchlos K, Ludwigs S, Köhn A, Laschat S. Rigidified Push-Pull Dyes: Using Chromophore Size, Donor, and Acceptor Units to Tune the Ground State between Neutral and the Cyanine Limit. Chempluschem 2017; 82:1197-1210. [DOI: 10.1002/cplu.201700347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Indexed: 11/06/2022]
Affiliation(s)
| | - Kirsten Bruchlos
- Institut für Polymerchemie; Universität Stuttgart; Pfaffenwalding 55 70569 Stuttgart Germany
| | - Sabine Ludwigs
- Institut für Polymerchemie; Universität Stuttgart; Pfaffenwalding 55 70569 Stuttgart Germany
| | - Andreas Köhn
- Institut für Theoretische Chemie; Universität Stuttgart; Pfaffenwalding 55 70569 Stuttgart Germany
| | - Sabine Laschat
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwalding 55 70569 Stuttgart Germany
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Martin C, Bruneel JL, Castet F, Fritsch A, Teissedre PL, Jourdes M, Guillaume F. Spectroscopic and theoretical investigations of phenolic acids in white wines. Food Chem 2016; 221:568-575. [PMID: 27979242 DOI: 10.1016/j.foodchem.2016.11.137] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 10/28/2016] [Accepted: 11/25/2016] [Indexed: 12/21/2022]
Abstract
Model solutions of white wines containing phenolic acids have been investigated by means of UV-vis, laser induced fluorescence and Raman spectroscopic techniques. In order to interpret the spectra, density functional theory calculations of phenolic acids have been performed. This work demonstrates that only hydroxynamic acids are in resonance with a laser excitation line with 325nm wavelength and are therefore at the origin of the strong enhancement of the Raman light scattering. Real white wines also display such resonance Raman scattering so that their content in hydroxycinnamic acids may be quite precisely determined. The analysis of the Raman spectrum of a real dry white wine reveals qualitatively the preponderance in its composition of p-coumaric and caftaric acids.
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Affiliation(s)
- Coralie Martin
- Université de Bordeaux, CNRS UMR 5255, ISM, 351 cours de la Libération, 33405 Talence Cedex, France; Advanced Track and Trace, ATT 99 avenue de la châtaigneraie, F-92500 Rueil Malmaison, France
| | - Jean-Luc Bruneel
- Université de Bordeaux, CNRS UMR 5255, ISM, 351 cours de la Libération, 33405 Talence Cedex, France
| | - Frédéric Castet
- Université de Bordeaux, CNRS UMR 5255, ISM, 351 cours de la Libération, 33405 Talence Cedex, France
| | - Alain Fritsch
- Université de Bordeaux, CNRS UMR 5255, ISM, 351 cours de la Libération, 33405 Talence Cedex, France
| | - Pierre-Louis Teissedre
- Université de Bordeaux, ISVV, EA4577 Unité de Recherche Œnologie, F-33140 Villenave D'ornon, France; INRA, ISVV, USC 1366 Œnologie, F-33140 Villenave d'Ornon, France
| | - Michael Jourdes
- Université de Bordeaux, ISVV, EA4577 Unité de Recherche Œnologie, F-33140 Villenave D'ornon, France; INRA, ISVV, USC 1366 Œnologie, F-33140 Villenave d'Ornon, France
| | - François Guillaume
- Université de Bordeaux, CNRS UMR 5255, ISM, 351 cours de la Libération, 33405 Talence Cedex, France.
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