1
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Pollet R, Chin W. In silico Investigation of the Thermochemistry and Photoactivity of Pyruvic Acid in an Aqueous Solution of NaCl. Chemistry 2023; 29:e202302225. [PMID: 37539648 DOI: 10.1002/chem.202302225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/05/2023]
Abstract
The photochemistry of oxocarboxylic acids contributes significantly to the complex chemistry occurring in the atmosphere. In this regard, pyruvic acid undergoes photoreactions that lead to many diverse products. The presence of sodium cation near pyruvic acid in an aqueous solution, or its conjugate base in non-acidic conditions, influences the hydration equilibrium and the photosensitivity to UV-visible light of the oxocarboxylic acid. We performed an ab initio metadynamics simulation which serves two purposes: first, it unveils the mechanisms of the reversible hydration reaction between the keto and the diol forms, with a free-energy difference of only 2 kJ/mol at 300 K, which shows the influence of sodium on the keto/diol ratio; second, it provides solvent-shared ion pairing (SSIP) and contact ion pairing (CIP) structures, including Na+ coordinated to carbonyl, for the calculations of the electronic transition energies to an antibonding π* orbital, which sheds light on the photoactivity of these two forms in the actinic region.
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Affiliation(s)
- Rodolphe Pollet
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191, Gif-sur-Yvette, France
| | - Wutharath Chin
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405, Orsay, France
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2
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Pham QD, Biatry B, Grégoire S, Topgaard D, Sparr E. Solubility of Foreign Molecules in Stratum Corneum Brick and Mortar Structure. Langmuir 2023; 39:2347-2357. [PMID: 36716111 PMCID: PMC9933541 DOI: 10.1021/acs.langmuir.2c03092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 01/12/2023] [Indexed: 06/18/2023]
Abstract
The barrier function of the skin is mainly assured by its outermost layer, stratum corneum (SC). One key aspect in predicting dermal drug delivery and in safety assessment of skin exposure to chemicals is the need to determine the amount of chemical that is taken up into the SC. We here present a strategy that allows for direct measures of the amount of various solid chemicals that can be dissolved in the SC in any environmental relative humidity (RH). A main advantage of the presented method is that it distinguishes between molecules that are dissolved within the SC and molecules that are not dissolved but might be present at, for example, the skin surface. In addition, the method allows for studies of uptake of hydrophobic chemicals without the need to use organic solvents. The strategy relies on the differences in the molecular properties of the added molecules in the dissolved and the excess states, employing detection methods that act as a dynamic filter to spot only one of the fractions, either the dissolved molecules or the excess solid molecules. By measuring the solubility in SC and delipidized SC at the same RHs, the same method can be used to estimate the distribution of the added chemical between the extracellular lipids and corneocytes at different hydration conditions. The solubility in porcine SC is shown to vary with hydration, which has implications for the molecular uptake and transport across the skin. The findings highlight the importance of assessing the chemical uptake at hydration conditions relevant to the specific applications. The methodology presented in this study can also be generalized to study the solubility and partitioning of chemicals in other heterogeneous materials with complex composition and structure.
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Affiliation(s)
- Quoc Dat Pham
- Division
of Physical Chemistry, Chemistry Department, Lund University, P.O. Box 124, 22100Lund, Sweden
- Gillette
Reading Innovation Centre, 460 Basingstoke Road, ReadingRG2 0QE, Berkshire, U.K.
| | - Bruno Biatry
- L’Oréal
Research & Innovation, 1, avenue Eugène Schueller, 93601Aulnay sous Bois, France
| | - Sébastien Grégoire
- L’Oréal
Research & Innovation, 1, avenue Eugène Schueller, 93601Aulnay sous Bois, France
| | - Daniel Topgaard
- Division
of Physical Chemistry, Chemistry Department, Lund University, P.O. Box 124, 22100Lund, Sweden
| | - Emma Sparr
- Division
of Physical Chemistry, Chemistry Department, Lund University, P.O. Box 124, 22100Lund, Sweden
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3
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Breslmayr E, Poliak P, Požgajčić A, Schindler R, Kracher D, Oostenbrink C, Ludwig R. Inhibition of the Peroxygenase Lytic Polysaccharide Monooxygenase by Carboxylic Acids and Amino Acids. Antioxidants (Basel) 2022; 11:1096. [PMID: 35739992 PMCID: PMC9220355 DOI: 10.3390/antiox11061096] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/23/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
Lytic polysaccharide monooxygenases (LPMOs) are widely distributed in fungi, and catalyze the oxidative degradation of polysaccharides such as cellulose. Despite their name, LPMOs possess a dominant peroxygenase activity that is reflected in high turnover numbers but also causes deactivation. We report on the influence of small molecules and ions on the activity and stability of LPMO during catalysis. Turbidimetric and photometric assays were used to identify LPMO inhibitors and measure their inhibitory effect. Selected inhibitors were employed to study LPMO activity and stability during cellulose depolymerization by HPLC and turbidimetry. It was found that the fungal metabolic products oxalic acid and citric acid strongly reduce LPMO activity, but also protect the enzyme from deactivation. QM calculations showed that the copper atom in the catalytic site could be ligated by bi- or tridentate chelating compounds, which replace two water molecules. MD simulations and QM calculations show that the most likely inhibition pattern is the competition between the inhibitor and reducing agent in the oxidized Cu(II) state. A correlation between the complexation energy and the IC50 values demonstrates that small, bidentate molecules interact strongest with the catalytic site copper and could be used by the fungus as physiological effectors to regulate LPMO activity.
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4
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Tilgner A, Schaefer T, Alexander B, Barth M, Collett JL, Fahey KM, Nenes A, Pye HOT, Herrmann H, McNeill VF. Acidity and the multiphase chemistry of atmospheric aqueous particles and clouds. Atmos Chem Phys 2021; 21:10.5194/acp-21-13483-2021. [PMID: 34675968 PMCID: PMC8525431 DOI: 10.5194/acp-21-13483-2021] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The acidity of aqueous atmospheric solutions is a key parameter driving both the partitioning of semi-volatile acidic and basic trace gases and their aqueous-phase chemistry. In addition, the acidity of atmospheric aqueous phases, e.g., deliquesced aerosol particles, cloud, and fog droplets, is also dictated by aqueous-phase chemistry. These feedbacks between acidity and chemistry have crucial implications for the tropospheric lifetime of air pollutants, atmospheric composition, deposition to terrestrial and oceanic ecosystems, visibility, climate, and human health. Atmospheric research has made substantial progress in understanding feedbacks between acidity and multiphase chemistry during recent decades. This paper reviews the current state of knowledge on these feedbacks with a focus on aerosol and cloud systems, which involve both inorganic and organic aqueous-phase chemistry. Here, we describe the impacts of acidity on the phase partitioning of acidic and basic gases and buffering phenomena. Next, we review feedbacks of different acidity regimes on key chemical reaction mechanisms and kinetics, as well as uncertainties and chemical subsystems with incomplete information. Finally, we discuss atmospheric implications and highlight the need for future investigations, particularly with respect to reducing emissions of key acid precursors in a changing world, and the need for advancements in field and laboratory measurements and model tools.
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Affiliation(s)
- Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - Becky Alexander
- Department of Atmospheric Science, University of Washington, Seattle, WA 98195, USA
| | - Mary Barth
- Atmospheric Chemistry Observation & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO 80307, USA
| | - Jeffrey L. Collett
- Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, USA
| | - Kathleen M. Fahey
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27711, USA
| | - Athanasios Nenes
- School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
- Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras 26504, Greece
| | - Havala O. T. Pye
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, Durham, NC 27711, USA
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
| | - V. Faye McNeill
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA
- Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, USA
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5
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Ailuno G, Iacobazzi RM, Lopalco A, Baldassari S, Arduino I, Azzariti A, Pastorino S, Caviglioli G, Denora N. The Pharmaceutical Technology Approach on Imaging Innovations from Italian Research. Pharmaceutics 2021; 13:1214. [PMID: 34452175 PMCID: PMC8402236 DOI: 10.3390/pharmaceutics13081214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/27/2021] [Accepted: 08/02/2021] [Indexed: 11/16/2022] Open
Abstract
Many modern therapeutic approaches are based on precise diagnostic evidence, where imaging procedures play an essential role. To date, in the diagnostic field, a plethora of agents have been investigated to increase the selectivity and sensitivity of diagnosis. However, the most common drawbacks of conventional imaging agents reside in their non-specificity, short imaging time, instability, and toxicity. Moreover, routinely used diagnostic agents have low molecular weights and consequently a rapid clearance and renal excretion, and this represents a limitation if long-lasting imaging analyses are to be conducted. Thus, the development of new agents for in vivo diagnostics requires not only a deep knowledge of the physical principles of the imaging techniques and of the physiopathological aspects of the disease but also of the relative pharmaceutical and biopharmaceutical requirements. In this scenario, skills in pharmaceutical technology have become highly indispensable in order to respond to these needs. This review specifically aims to collect examples of newly developed diagnostic agents connoting the importance of an appropriate formulation study for the realization of effective products. Within the context of pharmaceutical technology research in Italy, several groups have developed and patented promising agents for fluorescence and radioactive imaging, the most relevant of which are described hereafter.
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Affiliation(s)
- Giorgia Ailuno
- Department of Pharmacy, University of Genova, Viale Cembrano 4, 16148 Genova, Italy; (G.A.); (S.B.)
| | - Rosa Maria Iacobazzi
- Laboratory of Experimental Pharmacology, IRCCS Istituto Tumori “Giovanni Paolo II”, O. Flacco St., 70124 Bari, Italy; (R.M.I.); (A.A.)
| | - Antonio Lopalco
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari “Aldo Moro”, Orabona St. 4, 70125 Bari, Italy; (A.L.); (I.A.)
| | - Sara Baldassari
- Department of Pharmacy, University of Genova, Viale Cembrano 4, 16148 Genova, Italy; (G.A.); (S.B.)
| | - Ilaria Arduino
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari “Aldo Moro”, Orabona St. 4, 70125 Bari, Italy; (A.L.); (I.A.)
| | - Amalia Azzariti
- Laboratory of Experimental Pharmacology, IRCCS Istituto Tumori “Giovanni Paolo II”, O. Flacco St., 70124 Bari, Italy; (R.M.I.); (A.A.)
| | - Sara Pastorino
- Nuclear Medicine Unit, S. Andrea Hospital, via Vittorio Veneto 197, 19124 La Spezia, Italy;
| | - Gabriele Caviglioli
- Department of Pharmacy, University of Genova, Viale Cembrano 4, 16148 Genova, Italy; (G.A.); (S.B.)
| | - Nunzio Denora
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari “Aldo Moro”, Orabona St. 4, 70125 Bari, Italy; (A.L.); (I.A.)
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6
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Carrera C, Cavallari E, Digilio G, Bondar O, Aime S, Reineri F. ParaHydrogen Polarized Ethyl-[1- 13 C]pyruvate in Water, a Key Substrate for Fostering the PHIP-SAH Approach to Metabolic Imaging. Chemphyschem 2021; 22:1042-1048. [PMID: 33720491 PMCID: PMC8251755 DOI: 10.1002/cphc.202100062] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/12/2021] [Indexed: 01/01/2023]
Abstract
An efficient synthesis of vinyl-[1-13 C]pyruvate has been reported, from which 13 C hyperpolarized (HP) ethyl-[1-13 C]pyruvate has been obtained by means of ParaHydrogen Induced Polarization (PHIP). Due to the intrinsic lability of pyruvate, which leads quickly to degradation of the reaction mixture even under mild reaction conditions, the vinyl-ester has been synthesized through the intermediacy of a more stable ketal derivative. 13 C and 1 H hyperpolarizations of ethyl-[1-13 C]pyruvate, hydrogenated using ParaHydrogen, have been compared to those observed on the more widely used allyl-derivative. It has been demonstrated that the spin order transfer from ParaHydrogen protons to 13 C, is more efficient on the ethyl than on the allyl-esterdue to the larger J-couplings involved. The main requirements needed for the biological application of this HP product have been met, i. e. an aqueous solution of the product at high concentration (40 mM) with a good 13 C polarization level (4.8 %) has been obtained. The in vitro metabolic transformation of the HP ethyl-[1-13 C]pyruvate, catalyzed by an esterase, has been observed. This substrate appears to be a good candidate for in vivo metabolic investigations using PHIP hyperpolarized probes.
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Affiliation(s)
- Carla Carrera
- Institute of Biostructures and BioimagingNational Research CouncilVia Nizza 5210126TorinoItaly
| | - Eleonora Cavallari
- Department of Molecular Biotechnology and Health Sciences Molecular Imaging CentreUniversity of TorinoVia Nizza 5210126TorinoItaly
| | - Giuseppe Digilio
- Department of Science and Technologic InnovationUniversità del Piemonte Orientale “A. Avogadro”Viale Teresa Michel 1115121AlessandriaItaly
| | - Oksana Bondar
- Department of Molecular Biotechnology and Health Sciences Molecular Imaging CentreUniversity of TorinoVia Nizza 5210126TorinoItaly
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences Molecular Imaging CentreUniversity of TorinoVia Nizza 5210126TorinoItaly
| | - Francesca Reineri
- Department of Molecular Biotechnology and Health Sciences Molecular Imaging CentreUniversity of TorinoVia Nizza 5210126TorinoItaly
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7
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Ali SS, Elsamahy T, Koutra E, Kornaros M, El-Sheekh M, Abdelkarim EA, Zhu D, Sun J. Degradation of conventional plastic wastes in the environment: A review on current status of knowledge and future perspectives of disposal. Sci Total Environ 2021; 771:144719. [PMID: 33548729 DOI: 10.1016/j.scitotenv.2020.144719] [Citation(s) in RCA: 148] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/30/2020] [Accepted: 12/21/2020] [Indexed: 05/23/2023]
Abstract
Accumulation of plastic wastes has been recently recognized as one of the most critical environmental challenges, affecting all life forms, natural ecosystems and economy, worldwide. Under this threat, finding alternative environmentally-friendly solutions, such as biodegradation instead of traditional disposal, is of utmost importance. However, up to date, there is limited knowledge on plastic biodegradation mechanisms and efficiency. From this point of view, the purpose of this review is to highlight the negative effects of the accumulation of the most conventional plastic waste (polyethylene, polypropylene, polystyrene, polyvinylchloride, polyethylene terephthalate and polyurethane) on the environment and to present their degradability potential through abiotic and biotic processes. Furthermore, the ability of different microbial species for degradation of these polymers is thoroughly discussed. The present review also addresses the contribution of invertebrates, such as insects, in plastic degradation process, highlighting the vital role that they could play in the future. In total, a schematic pathway of an innovative approach to improve the disposal of plastic wastes is proposed, with view to establishing an effective and sustainable practice for plastic waste management.
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Affiliation(s)
- Sameh Samir Ali
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Tamer Elsamahy
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Eleni Koutra
- Laboratory of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 1 Karatheodori Str., University Campus, 26504 Patras, Greece; INVALOR: Research Infrastructure for Waste Valorization and Sustainable Management, University Campus, 26504 Patras, Greece
| | - Michael Kornaros
- Laboratory of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 1 Karatheodori Str., University Campus, 26504 Patras, Greece; INVALOR: Research Infrastructure for Waste Valorization and Sustainable Management, University Campus, 26504 Patras, Greece
| | - Mostafa El-Sheekh
- Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Esraa A Abdelkarim
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Daochen Zhu
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jianzhong Sun
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
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8
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Pollet R, Chin W. Reversible Hydration of α-Dicarbonyl Compounds from Ab Initio Metadynamics Simulations: Comparison between Pyruvic and Glyoxylic Acids in Aqueous Solutions. J Phys Chem B 2021; 125:2942-2951. [PMID: 33725456 DOI: 10.1021/acs.jpcb.0c09748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Glyoxylic and pyruvic oxoacids are widely available in the atmosphere as gas-phase clusters and particles or in wet aerosols. In aqueous conditions, they undergo interconversion between the unhydrated oxo and gem-diol forms, where two hydroxyl groups replace the carbonyl group. We here examine the hydration equilibrium of glyoxylic and pyruvic acids with first-principles simulations in water at ambient conditions using ab initio metadynamics to reconstruct the corresponding free-energy landscapes. The main results are as follows: (i) our simulations reveal the high conformational diversity of these species in aqueous solutions. (ii) We show that gem-diol is strongly favored in water compared to its oxo counterpart by 29 and 16 kJ/mol for glyoxylic and pyruvic acids, respectively. (iii) From our atomic-scale simulations, we present new insights into the reaction mechanisms with a special focus on hydrogen-bond arrangements and the electronic structure of the transition state.
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Affiliation(s)
- Rodolphe Pollet
- NIMBE, Université Paris-Saclay, CEA, CNRS, 91191 Gif-sur-Yvette, France
| | - Wutharath Chin
- Institut des Sciences Moléculaires d'Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France
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9
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Luo M, Wauer NA, Angle KJ, Dommer AC, Song M, Nowak CM, Amaro RE, Grassian VH. Insights into the behavior of nonanoic acid and its conjugate base at the air/water interface through a combined experimental and theoretical approach. Chem Sci 2020; 11:10647-10656. [PMID: 33144932 PMCID: PMC7583472 DOI: 10.1039/d0sc02354j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/15/2020] [Indexed: 12/14/2022] Open
Abstract
The partitioning of medium-chain fatty acid surfactants such as nonanoic acid (NA) between the bulk phase and the air/water interface is of interest to a number of fields including marine and atmospheric chemistry. However, questions remain about the behavior of these molecules, the contributions of various relevant chemical equilibria, and the impact of pH, salt and bulk surfactant concentrations. In this study, the surface adsorption of nonanoic acid and its conjugate base is quantitatively investigated at various pH values, surfactant concentrations and the presence of salts. Surface concentrations of protonated and deprotonated species are dictated by surface-bulk equilibria which can be calculated from thermodynamic considerations. Notably we conclude that the surface dissociation constant of soluble surfactants cannot be directly obtained from these experimental measurements, however, we show that molecular dynamics (MD) simulation methods, such as free energy perturbation (FEP), can be used to calculate the surface acid dissociation constant relative to that in the bulk. These simulations show that nonanoic acid is less acidic at the surface compared to in the bulk solution with a pK a shift of 1.1 ± 0.6, yielding a predicted surface pK a of 5.9 ± 0.6. A thermodynamic cycle for nonanoic acid and its conjugate base between the air/water interface and the bulk phase can therefore be established. Furthermore, the effect of salts, namely NaCl, on the surface activity of protonated and deprotonated forms of nonanoic acid is also examined. Interestingly, salts cause both a decrease in the bulk pK a of nonanoic acid and a stabilization of both the protonated and deprotonated forms at the surface. Overall, these results suggest that the deprotonated medium-chain fatty acids under ocean conditions can also be present within the sea surface microlayer (SSML) present at the ocean/atmosphere interface due to the stabilization effect of the salts in the ocean. This allows the transfer of these species into sea spray aerosols (SSAs). More generally, we present a framework with which the behavior of partially soluble species at the air/water interface can be predicted from surface adsorption models and the surface pK a can be predicted from MD simulations.
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Affiliation(s)
- Man Luo
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Nicholas A Wauer
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Kyle J Angle
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Abigail C Dommer
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Meishi Song
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Christopher M Nowak
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Rommie E Amaro
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
| | - Vicki H Grassian
- Department of Chemistry and Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA . ;
- Department of Nanoengineering , Scripps Institution of Oceanography , University of California , La Jolla , San Diego , CA 92093 , USA
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10
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Luo M, Shemesh D, Sullivan MN, Alves MR, Song M, Gerber RB, Grassian VH. Impact of pH and NaCl and CaCl2 Salts on the Speciation and Photochemistry of Pyruvic Acid in the Aqueous Phase. J Phys Chem A 2020; 124:5071-5080. [DOI: 10.1021/acs.jpca.0c01016] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Man Luo
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Dorit Shemesh
- Institute of Chemistry and Fritz Haber Research Center, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Michael N. Sullivan
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Michael R. Alves
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Meishi Song
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - R. Benny Gerber
- Institute of Chemistry and Fritz Haber Research Center, Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Department of Chemistry, University of California, Irvine, California 92617, United States
| | - Vicki H. Grassian
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
- Scripps Institution of Oceanography, University of California, San Diego, California 92037, United States
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11
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Chatterjee T, Boutin E, Robert M. Manifesto for the routine use of NMR for the liquid product analysis of aqueous CO 2 reduction: from comprehensive chemical shift data to formaldehyde quantification in water. Dalton Trans 2020; 49:4257-4265. [PMID: 32129388 DOI: 10.1039/c9dt04749b] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
CO2 reduction research is at a critical turnaround since it has the potential to partially or even substantially fulfil future clean energy needs. CO2-to-CO electrochemical conversion is getting closer from industrial implementation requirements. Efforts are now more and more directed to obtain highly reduced products such as methanol, methane, ethylene, ethanol, etc., most of them being liquids. Gas-phase products (e.g., CO, CH4) are typically detected and quantified by well-defined gas chromatography (GC and GC/MS) protocols. On the other hand, NMR, GC-MS, HPLC have been used for the liquid phase characterization, but no routine technique has yet been established, mainly due to lack of versatility of a single technique. Additionally, except NMR and GC-MS, classical techniques cannot distinguish 13C from 12C products, although it is a mandatory step to assess products origin. Herein, we show the efficiency and applicability of 1H NMR as routine technique for liquid phase products analysis and we address two previous shortcomings. We first established a comprehensive 1H and 13C NMR chemical shifts list for all 12CO2 and 13CO2 reduction products in water ranging from C1 to C3. Then we overcame the difficulty of identifying aqueous formaldehyde intermediate by 1H NMR through an efficient chemical trapping step, along with isotopic signature study. Formaldehyde can be reliably quantified in water with a concentration as low as 50 μM.
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Affiliation(s)
- Tamal Chatterjee
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75013 Paris, France.
| | - Etienne Boutin
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75013 Paris, France.
| | - Marc Robert
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75013 Paris, France.
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12
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Shemesh D, Luo M, Grassian VH, Gerber RB. Absorption spectra of pyruvic acid in water: insights from calculations for small hydrates and comparison to experiment. Phys Chem Chem Phys 2020; 22:12658-12670. [DOI: 10.1039/d0cp01810d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This study shows that small hydrate models including the roles of both neutral and deprotonated speciated forms provide a good quantitative description and a microscopic interpretation of the experimental spectrum of pyruvic acid in aqueous solution.
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Affiliation(s)
- Dorit Shemesh
- Institute of Chemistry
- Fritz Haber Research Center
- Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Man Luo
- Department of Chemistry
- University of California
- San Diego
- USA
| | | | - R. Benny Gerber
- Institute of Chemistry
- Fritz Haber Research Center
- Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
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13
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Lopalco A, Deeken R, Douglas J, Denora N, Stella VJ. Some Preformulation Studies of Pyruvic Acid and Other α-Keto Carboxylic Acids in Aqueous Solution: Pharmaceutical Formulation Implications for These Peroxide Scavengers. J Pharm Sci 2019; 108:3281-3288. [PMID: 31163186 DOI: 10.1016/j.xphs.2019.05.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/26/2019] [Accepted: 05/17/2019] [Indexed: 11/18/2022]
Abstract
The purpose of this study is to assess some of the variables determining the aldol-like condensation of pyruvic acid (1), a peroxide scavenger, in aqueous solution to parapyruvic acid and higher oligomers. Its stability is compared to 3 other α-keto carboxylic acids, 2 with sterically hindered methylene groups alpha to the keto functionality (2-3) and phenylglyoxylic acid (4) with no methylene group. High-performance liquid chromatography, nuclear magnetic resonance, and liquid chromatography mass spectroscopy techniques are used in the kinetics and product analyses. 1 condensation is concentration dependent and base catalyzed above pH 7, consistent with the reaction mechanism proceeding through the attack of the fraction of the methylene group, alpha to the keto group, in its anionic form, at the keto group of a second molecule of 1. The major product is confirmed to be parapyruvic acid, but higher-order oligomers are also observed. All 3 of the other α-keto carboxylic acids 2-4 are considerably less reactive, with 4 being completely stable. Stable solutions of 1 can be prepared by the use of relatively dilute solutions maintained at slightly acidic pH values. 1 prevents the oxidation of methionine on addition of hydrogen peroxide.
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Affiliation(s)
- Antonio Lopalco
- Department of Pharmacy - Drug Sciences, The University of Bari Aldo Moro, Bari 70125, Italy.
| | - Rodney Deeken
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047
| | - Justin Douglas
- Nuclear Magnetic Resonance Core Laboratory, Molecular Structures Group, The University of Kansas, Lawrence, Kansas 66045
| | - Nunzio Denora
- Department of Pharmacy - Drug Sciences, The University of Bari Aldo Moro, Bari 70125, Italy
| | - Valentino J Stella
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047
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14
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Kouřil K, Kouřilová H, Bartram S, Levitt MH, Meier B. Scalable dissolution-dynamic nuclear polarization with rapid transfer of a polarized solid. Nat Commun 2019; 10:1733. [PMID: 30988293 PMCID: PMC6465283 DOI: 10.1038/s41467-019-09726-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 03/27/2019] [Indexed: 12/02/2022] Open
Abstract
In dissolution-dynamic nuclear polarization, nuclear spins are hyperpolarized at cryogenic temperatures using radicals and microwave irradiation. The hyperpolarized solid is dissolved with hot solvent and the solution is transferred to a secondary magnet where strongly enhanced magnetic resonance signals are observed. Here we present a method for transferring the hyperpolarized solid. A bullet containing the frozen, hyperpolarized sample is ejected using pressurized helium gas, and shot into a receiving structure in the secondary magnet, where the bullet is retained and the polarized solid is dissolved rapidly. The transfer takes approximately 70 ms. A solenoid, wound along the entire transfer path ensures adiabatic transfer and limits radical-induced low-field relaxation. The method is fast and scalable towards small volumes suitable for high-resolution nuclear magnetic resonance spectroscopy while maintaining high concentrations of the target molecule. Polarization levels of approximately 30% have been observed for 1-13C-labelled pyruvic acid in solution. Dissolution-dynamic nuclear polarization is able to enhance nuclear magnetic resonance signals, but requires complex procedures to generate hyperpolarized nuclear spins. Here the authors establish a fast and facile method to transfer hyperpolarized samples into the liquid solution where the measurement is performed.
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Affiliation(s)
- Karel Kouřil
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
| | - Hana Kouřilová
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Samuel Bartram
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Malcolm H Levitt
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Benno Meier
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
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15
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Cutrignelli A, Sanarica F, Lopalco A, Lopedota A, Laquintana V, Franco M, Boccanegra B, Mantuano P, De Luca A, Denora N. Dasatinib/HP-β-CD Inclusion Complex Based Aqueous Formulation as a Promising Tool for the Treatment of Paediatric Neuromuscular Disorders. Int J Mol Sci 2019; 20:E591. [PMID: 30704045 DOI: 10.3390/ijms20030591] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/18/2019] [Accepted: 01/27/2019] [Indexed: 12/31/2022] Open
Abstract
New scientific findings have recently shown that dasatinib (DAS), the first-choice oral drug in the treatment of chronic myeloid leukemia (CML) for adult patients who are resistant or intolerant to imatinib, is also potentially useful in the paediatric age. Moreover, recent preclinical evidences suggest that this drug could be useful for the treatment of Duchenne muscular dystrophy, since it targets cSrc tyrosin kinase. Based on these considerations, the purpose of this work was to use the strategy of complexation with hydroxypropyl-β-cyclodextrin (HP-β-CD) in order to obtain an aqueous preparation of DAS, which is characterized by a low water solubility (6.49 × 10−4 mg/mL). Complexation studies demonstrated that HP-β-CD is able to form a stable host-guest inclusion complex with DAS with a 1:1 apparent formation constant of 922.13 M−1, as also demonstrated by the Job’s plot, with an increase in DAS aqueous solubility of about 21 times in the presence of 6% w/v of HP-β-CD (0.014 mg/mL). The inclusion complex has been prepared in the solid state by lyophilization and characterized by Fourier Transform Infrared (FT-IR), Nuclear Magnetic Resonance (NMR), Differential Scanning Calorimetry (DSC) techniques, and its dissolution profile was studied at different pH values. Moreover, in view of potential use of DAS for Duchenne muscular dystrophy, the cytotoxic effect of the inclusion complex has been assessed on C2C12 cells, a murine muscle satellite cell line. In parallel, a one-week oral treatment was performed in wild type C57Bl/6J mice to test both palatability and the exposure levels of the new oral formulation of the compound. In conclusion, this new inclusion complex could allow the development of a liquid and solvent free formulation to be administered both orally and parenterally, especially in the case of an administration in paediatric age.
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16
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Lopalco A, Curci A, Lopedota A, Cutrignelli A, Laquintana V, Franco M, Denora N. Pharmaceutical preformulation studies and paediatric oral formulations of sodium dichloroacetate. Eur J Pharm Sci 2018; 127:339-350. [PMID: 30447284 DOI: 10.1016/j.ejps.2018.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 09/17/2018] [Accepted: 11/13/2018] [Indexed: 11/26/2022]
Abstract
The purpose of this study was to develop liquid and solid paediatric formulations of sodium dichloroacetate (DCA) for the treatment of congenital lactic acidosis (CLA). In this work preformulation studies on the active molecule were performed to identify those physico-chemical properties of the drug relevant to the design of the dosage forms and their process of manufacture. TGA and DSC analysis suggested that sodium DCA was very hygroscopic. HPLC and NMR analysis showed that the compound was widely stable in aqueous solutions at 25 and 40 °C at all the pH values studied. Based on these results, sodium DCA was formulated as palatable solutions containing sweetener, viscosity enhancer and flavoring excipients tolerated by paediatric patients affected by CLA. The developed liquid formulations resulted chemically stable at 25 and 4 °C over three months. In use-stability tests showed no chemical degradation and microbiological contamination over one month. Oral tablets of sodium DCA were prepared by molding technique as an alternative and more practical formulation, easier to administer for caregivers than the liquid one. Technological assays (reported in the European Pharmacopeia) showed that oral tablets disaggregated quickly within 3 min at 25 °C in water, thus they were classified as orally disintegrating tablets. Preformulation studies provided a set of parameters against which detailed formulation design could be carried out. Formulation studies showed that the developed dosage forms achieved adequate stability, producibility and patient acceptability.
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Affiliation(s)
- Antonio Lopalco
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy
| | - Alessandra Curci
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy
| | - Angela Lopedota
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy
| | - Annalisa Cutrignelli
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy
| | - Valentino Laquintana
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy
| | - Massimo Franco
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy
| | - Nunzio Denora
- University of Bari Aldo Moro, Department of Pharmacy - Drug Sciences, 4 E. Orabona st, 70125 Bari, Italy.
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Suzuki R, Sakakura M, Mori M, Fujii M, Akashi S, Takahashi H. Methyl-selective isotope labeling using α-ketoisovalerate for the yeast Pichia pastoris recombinant protein expression system. J Biomol NMR 2018; 71:213-223. [PMID: 29869771 DOI: 10.1007/s10858-018-0192-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
Methyl-detected NMR spectroscopy is a useful tool for investigating the structures and interactions of large macromolecules such as membrane proteins. The procedures for preparation of methyl-specific isotopically-labeled proteins were established for the Escherichia coli (E. coli) expression system, but typically it is not feasible to express eukaryotic proteins using E. coli. The Pichia pastoris (P. pastoris) expression system is the most common yeast expression system, and is known to be superior to the E. coli system for the expression of mammalian proteins, including secretory and membrane proteins. However, this system has not yet been optimized for methyl-specific isotope labeling, especially for Val/Leu-methyl specific isotope incorporation. To overcome this difficulty, we explored various culture conditions for the yeast cells to efficiently uptake Val/Leu precursors. Among the searched conditions, we found that the cultivation pH has a critical effect on Val/Leu precursor uptake. At an acidic cultivation pH, the uptake of the Val/Leu precursor was increased, and methyl groups of Val and Leu in the synthesized recombinant protein yielded intense 1H-13C correlation signals. Based on these results, we present optimized protocols for the Val/Leu-methyl-selective 13C incorporation by the P. pastoris expression system.
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Affiliation(s)
- Rika Suzuki
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Masayoshi Sakakura
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Masaki Mori
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Moe Fujii
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Satoko Akashi
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Hideo Takahashi
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan.
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18
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Foti C, Lopalco A, Stingeni L, Hansel K, Lopedota A, Denora N, Romita P. Contact allergy to electrocardiogram electrodes caused by acrylic acid without sensitivity to methacrylates and ethyl cyanoacrylate. Contact Dermatitis 2018; 79:118-121. [PMID: 29749023 DOI: 10.1111/cod.13015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/19/2018] [Accepted: 03/22/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Caterina Foti
- Department of Biomedical Science and Human Oncology, Dermatological Clinic, University of Bari, Bari, Italy
| | - Antonio Lopalco
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
| | - Luca Stingeni
- Clinical, Allergological and Venereological Dermatology Section, Department of Medicine, University of Perugia, Perugia, Italy
| | - Katharina Hansel
- Clinical, Allergological and Venereological Dermatology Section, Department of Medicine, University of Perugia, Perugia, Italy
| | - Angela Lopedota
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
| | - Nunzio Denora
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
| | - Paolo Romita
- Department of Biomedical Science and Human Oncology, Dermatological Clinic, University of Bari, Bari, Italy
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19
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Lopalco A, Cutrignelli A, Denora N, Perrone M, Iacobazzi RM, Fanizza E, Lopedota A, Depalo N, de Candia M, Franco M, Laquintana V. Delivery of Proapoptotic Agents in Glioma Cell Lines by TSPO Ligand-Dextran Nanogels. Int J Mol Sci 2018; 19:ijms19041155. [PMID: 29641449 PMCID: PMC5979576 DOI: 10.3390/ijms19041155] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/07/2018] [Accepted: 04/08/2018] [Indexed: 12/22/2022] Open
Abstract
Translocator protein 18-kDa (TSPO) is a versatile mitochondrial target for molecular imaging and therapy. Moreover, selective TSPO ligands have been widely investigated for diagnostic purposes and explored to target drug delivery systems directed to cancer cells overexpressing TSPO. Indeed, poly(d,l-lactic-co-glycolic acid (PLGA) polymers and nanocarriers decorated with TSPO ligands are capable of transporting TSPO ligands inside cancer cells, inducing survival inhibition in cancer cells and producing mitochondrial morphology modification. The aim of this work was to prepare nanogels (NGs) made with TSPO ligand dextran conjugates (TSPO-Dex) that are useful as potential delivery systems of two TSPO ligands as apoptotic agents. Synthesis and complete characterization of TSPO–dextran conjugates, an average molecular weights analysis, TSPO ligand release profiles, thermal behaviour and swelling studies were achieved. NG preparation, characterization and in vitro biological studies were also performed. The release of TSPO ligands released from dextran conjugates at 37 °C occurred in human serum at a faster rate than that detected in phosphate buffer. Cytotoxicity studies demonstrated that NGs produced from TSPO ligand–dextran conjugates induce survival inhibition in rat C6 glioma cell lines. Cellular uptake was also proven by fluorescence microscopy.
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Affiliation(s)
- Antonio Lopalco
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
| | - Annalisa Cutrignelli
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
| | - Nunzio Denora
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
- Institute for Physical and Chemical Processes (IPCF)-CNR, SS Bari, Via Orabona, St. 4, 70125 Bari, Italy.
| | - Mara Perrone
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
- Istituto tumori IRCCS "Giovanni Paolo II", Flacco, St. 65, 70124 Bari, Italy.
| | | | - Elisabetta Fanizza
- Institute for Physical and Chemical Processes (IPCF)-CNR, SS Bari, Via Orabona, St. 4, 70125 Bari, Italy.
- Department of Chemistry, University of Bari "Aldo Moro", 70125 Bari, Italy.
| | - Angela Lopedota
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
| | - Nicoletta Depalo
- Institute for Physical and Chemical Processes (IPCF)-CNR, SS Bari, Via Orabona, St. 4, 70125 Bari, Italy.
| | - Modesto de Candia
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
| | - Massimo Franco
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
| | - Valentino Laquintana
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", Via Orabona, St. 4, 70125 Bari, Italy.
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20
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Lopedota A, Denora N, Laquintana V, Cutrignelli A, Lopalco A, Tricarico D, Maqoud F, Curci A, Mastrodonato M, la Forgia F, Fontana S, Franco M. Alginate-Based Hydrogel Containing Minoxidil/Hydroxypropyl-β-Cyclodextrin Inclusion Complex for Topical Alopecia Treatment. J Pharm Sci 2018; 107:1046-1054. [DOI: 10.1016/j.xphs.2017.11.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 11/16/2017] [Indexed: 11/30/2022]
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21
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Lopalco A, Cutrignelli A, Denora N, Lopedota A, Franco M, Laquintana V. Transferrin Functionalized Liposomes Loading Dopamine HCl: Development and Permeability Studies across an In Vitro Model of Human Blood-Brain Barrier. Nanomaterials (Basel) 2018; 8:nano8030178. [PMID: 29558440 PMCID: PMC5869669 DOI: 10.3390/nano8030178] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 03/16/2018] [Accepted: 03/16/2018] [Indexed: 12/13/2022]
Abstract
The transport of dopamine across the blood brain barrier represents a challenge for the management of Parkinson’s disease. The employment of central nervous system targeted ligands functionalized nanocarriers could be a valid tactic to overcome this obstacle and avoid undesirable side effects. In this work, transferrin functionalized dopamine-loaded liposomes were made by a modified dehydration–rehydration technique from hydrogenated soy phosphatidylcoline, cholesterol and 1,2-stearoyl-sn-glycero-3-phosphoethanolamine-N-[carboxy(poly(ethylene glycol)-2000)]. The physical features of the prepared liposomes were established with successive determination of their endothelial permeability across an in vitro model of the blood-brain barrier, constituted by human cerebral microvascular endothelial cells (hCMEC/D3). Functionalized dopamine-loaded liposomes with encapsulation efficiency more than 35% were made with sizes in a range around 180 nm, polydispersity indices of 0.2, and positive zeta potential values (+7.5 mV). Their stability and drug release kinetics were also evaluated. The apparent permeability (Pe) values of encapsulated dopamine in functionalized and unfunctionalized liposomes showed that transferrin functionalized nanocarriers could represent appealing non-toxic candidates for brain delivery, thus improving benefits and decreasing complications to patients subjected to L-dopa chronical treatment.
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Affiliation(s)
- Antonio Lopalco
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", 4 E. Orabona st, 70125 Bari, Italy.
| | - Annalisa Cutrignelli
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", 4 E. Orabona st, 70125 Bari, Italy.
| | - Nunzio Denora
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", 4 E. Orabona st, 70125 Bari, Italy.
- Institute for Physical and Chemical Processes (IPCF)-CNR, SS Bari, 4 E. Orabona st, 70125 Bari, Italy.
| | - Angela Lopedota
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", 4 E. Orabona st, 70125 Bari, Italy.
| | - Massimo Franco
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", 4 E. Orabona st, 70125 Bari, Italy.
| | - Valentino Laquintana
- Department of Pharmacy-Drug Sciences, University of Bari "Aldo Moro", 4 E. Orabona st, 70125 Bari, Italy.
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22
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Tricarico D, Maqoud F, Curci A, Camerino G, Zizzo N, Denora N, Cutrignelli A, Laquintana V, Lopalco A, la Forgia F, Fontana S, Franco M, Lopedota A. Characterization of minoxidil/hydroxypropyl-β-cyclodextrin inclusion complex in aqueous alginate gel useful for alopecia management: Efficacy evaluation in male rat. Eur J Pharm Biopharm 2018; 122:146-57. [DOI: 10.1016/j.ejpb.2017.10.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/26/2017] [Accepted: 10/23/2017] [Indexed: 01/26/2023]
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23
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Onoda H, Shoji O, Suzuki K, Sugimoto H, Shiro Y, Watanabe Y. α-Oxidative decarboxylation of fatty acids catalysed by cytochrome P450 peroxygenases yielding shorter-alkyl-chain fatty acids. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02263h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Shorter-alkyl-chain fatty acids such as tridecanoic acid or lauric acid were produced from myristic acid by CYP152 peroxygenases.
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Affiliation(s)
- Hiroki Onoda
- Department of Chemistry, Graduate School of Science
- Nagoya University
- Nagoya 464-0802
- Japan
| | - Osami Shoji
- Department of Chemistry, Graduate School of Science
- Nagoya University
- Nagoya 464-0802
- Japan
- Core Research for Evolutional Science and Technology (CREST)
| | - Kazuto Suzuki
- Department of Chemistry, Graduate School of Science
- Nagoya University
- Nagoya 464-0802
- Japan
| | - Hiroshi Sugimoto
- Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency
- Tokyo
- Japan
- RIKEN SPring-8 Center
| | | | - Yoshihito Watanabe
- Research Center for Materials Science
- Nagoya University
- Nagoya 464-0802
- Japan
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24
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Cassano T, Lopalco A, de Candia M, Laquintana V, Lopedota A, Cutrignelli A, Perrone M, Iacobazzi RM, Bedse G, Franco M, Denora N, Altomare CD. Oxazepam-Dopamine Conjugates Increase Dopamine Delivery into Striatum of Intact Rats. Mol Pharm 2017; 14:3178-3187. [PMID: 28780872 DOI: 10.1021/acs.molpharmaceut.7b00405] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The neurotransmitter dopamine (DA) was covalently linked to oxazepam (OXA), a well-known positive allosteric modulator of γ-aminobutyric acid type-A (GABAA) receptor, through a carbamate linkage (4) or a succinic spacer (6). These conjugates were synthesized with the aim of improving the delivery of DA into the brain and enhancing GABAergic transmission, which may be useful for the long-term treatment of Parkinson disease (PD). Structure-based permeability properties, in vitro stability, and blood-brain barrier (BBB) permeability studies led to identify the OXA-DA carbamate conjugate 4a as the compound better combining sufficient stability and ability to cross BBB. Finally, in vivo microdialysis experiments in freely moving rats demonstrated that 4a (20 mg/kg, i.p.) significantly increases extracellular DA levels into striatum, with a peak (more than 15-fold increase over the baseline) at about 80 min after a single administration. The stability and delivery data proved that 4a may be a promising candidate for further pharmacological studies in animal models of PD.
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Affiliation(s)
- Tommaso Cassano
- Department of Clinical and Experimental Medicine, University of Foggia , Foggia 71100, Italy
| | - Antonio Lopalco
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Modesto de Candia
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Valentino Laquintana
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Angela Lopedota
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Annalisa Cutrignelli
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Mara Perrone
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Rosa M Iacobazzi
- Istituto tumori IRCCS "Giovanni Paolo II" , Flacco, St. 65, 70124 Bari, Italy
| | - Gaurav Bedse
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University of Rome , 00185 Rome, Italy.,Department of Psychiatry, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | - Massimo Franco
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Nunzio Denora
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
| | - Cosimo D Altomare
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro , Bari 70125, Italy
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Iacobazzi RM, Lopalco A, Cutrignelli A, Laquintana V, Lopedota A, Franco M, Denora N. Bridging Pharmaceutical Chemistry with Drug and Nanoparticle Targeting to Investigate the Role of the 18-kDa Translocator Protein TSPO. ChemMedChem 2017; 12:1261-1274. [PMID: 28771957 DOI: 10.1002/cmdc.201700322] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/06/2017] [Indexed: 11/10/2022]
Abstract
An interesting mitochondrial biomarker is the 18-kDa mitochondrial translocator protein (TSPO). Decades of study have shown that this protein plays an important role in a wide range of cellular functions, including opening of the mitochondrial permeability transition pore as well as programmed cell death and proliferation. Variations in TSPO expression have been correlated to different diseases, from tumors to endocrine and neurological disorders. TSPO has therefore become an appealing target for both early diagnosis and selective mitochondrial drug delivery. The number of structurally different TSPO ligands examined has increased over time, highlighting the scientific community's growing understanding of the roles of TSPO in normal and pathological conditions. However, only few TSPO ligands are characterized by the presence of groups that are potentially derivatizable; therefore only few such ligands are well suited for the preparation of targeted prodrugs or nanocarriers able to deliver therapeutics and/or diagnostic agents to mitochondria. This review provides an overview of the very few examples of drug delivery systems characterized by moieties that target TSPO.
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Affiliation(s)
| | - Antonio Lopalco
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Annalisa Cutrignelli
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Valentino Laquintana
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Angela Lopedota
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Massimo Franco
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Nunzio Denora
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
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Caruso G, Fresta CG, Martinez-Becerra F, Antonio L, Johnson RT, de Campos RPS, Siegel JM, Wijesinghe MB, Lazzarino G, Lunte SM. Carnosine modulates nitric oxide in stimulated murine RAW 264.7 macrophages. Mol Cell Biochem 2017; 431:197-210. [PMID: 28290048 DOI: 10.1007/s11010-017-2991-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 02/24/2017] [Indexed: 12/24/2022]
Abstract
Excess nitric oxide (NO) production occurs in several pathological states, including neurodegeneration, ischemia, and inflammation, and is generally accompanied by increased oxidative/nitrosative stress. Carnosine [β-alanine-histidine (β-Ala-His)] has been reported to decrease oxidative/nitrosative stress-associated cell damage by reducing the amount of NO produced. In this study, we evaluated the effect of carnosine on NO production by murine RAW 264.7 macrophages stimulated with lipopolysaccharides + interferon-γ. Intracellular NO and intracellular and extracellular nitrite were measured by microchip electrophoresis with laser-induced fluorescence and by the Griess assay, respectively. Results showed that carnosine causes an apparent suppression of total NO production by stimulated macrophages accompanied by an unexpected simultaneous drastic increase in its intracellular low toxicity endproduct, nitrite, with no inhibition of inducible nitric oxide synthase (iNOS). ESI-MS and NMR spectroscopy in a cell-free system showed the formation of multiple adducts (at different ratios) of carnosine-NO and carnosine-nitrite, involving both constituent amino acids (β-Ala and His) of carnosine, thus providing a possible mechanism for the changes in free NO and nitrite in the presence of carnosine. In stimulated macrophages, the addition of carnosine was also characterized by changes in the expression of macrophage activation markers and a decrease in the release of IL-6, suggesting that carnosine might alter M1/M2 macrophage ratio. These results provide evidence for previously unknown properties of carnosine that modulate the NO/nitrite ratio of stimulated macrophages. This modulation is also accompanied by changes in the release of pro-inflammatory molecules, and does not involve the inhibition of iNOS activity.
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Affiliation(s)
- Giuseppe Caruso
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA.,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA
| | - Claudia G Fresta
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA.,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA
| | - Francisco Martinez-Becerra
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA.,Immunology Core Laboratory of the Kansas Vaccine Institute, University of Kansas, Lawrence, KS, USA
| | - Lopalco Antonio
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA
| | - Ryan T Johnson
- Department of Chemistry, University of Kansas, Lawrence, KS, USA
| | - Richard P S de Campos
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA.,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA.,Department of Chemistry, State University of Campinas, Campinas, Brazil
| | - Joseph M Siegel
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA.,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA
| | - Manjula B Wijesinghe
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA.,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA
| | - Giuseppe Lazzarino
- Division of Medical Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy.
| | - Susan M Lunte
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA. .,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, USA. .,Department of Chemistry, University of Kansas, Lawrence, KS, USA.
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Lopalco A, Stella VJ. Effect of Molecular Structure on the Relative Hydrogen Peroxide Scavenging Ability of Some α-Keto Carboxylic Acids. J Pharm Sci 2016; 105:2879-2885. [DOI: 10.1016/j.xphs.2016.03.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 03/28/2016] [Accepted: 03/30/2016] [Indexed: 11/16/2022]
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Lopalco A, Dalwadi G, Niu S, Schowen RL, Douglas J, Stella VJ. Mechanism of Decarboxylation of Pyruvic Acid in the Presence of Hydrogen Peroxide. J Pharm Sci 2016; 105:705-713. [PMID: 26422524 DOI: 10.1002/jps.24653] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 08/10/2015] [Accepted: 08/26/2015] [Indexed: 11/10/2022]
Abstract
The purpose of this work was to probe the rate and mechanism of rapid decarboxylation of pyruvic acid in the presence of hydrogen peroxide (H2O2) to acetic acid and carbon dioxide over the pH range 2-9 at 25 °C, utilizing UV spectrophotometry, high performance liquid chromatography (HPLC), and proton and carbon nuclear magnetic resonance spectrometry ((1)H, (13)C-NMR). Changes in UV absorbance at 220 nm were used to determine the kinetics as the reaction was too fast to follow by HPLC or NMR in much of the pH range. The rate constants for the reaction were determined in the presence of molar excess of H2O2 resulting in pseudo first-order kinetics. No buffer catalysis was observed. The calculated second-order rate constants for the reaction followed a sigmoidal shape with pH-independent regions below pH 3 and above pH 7 but increased between pH 4 and 6. Between pH 4 and 9, the results were in agreement with a change from rate-determining nucleophilic attack of the deprotonated peroxide species, HOO(-), on the α-carbonyl group followed by rapid decarboxylation at pH values below 6 to rate-determining decarboxylation above pH 7. The addition of H2O2 to ethyl pyruvate was also characterized.
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Affiliation(s)
- Antonio Lopalco
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047
| | - Gautam Dalwadi
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047
| | - Sida Niu
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047
| | - Richard L Schowen
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047
| | - Justin Douglas
- Nuclear Magnetic Resonance Laboratory, Lawrence, Kansas 66045
| | - Valentino J Stella
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66047.
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