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Kimura A, Arai T, Ueno M, Oyama K, Yu H, Yamashita S, Otome Y, Taguchi M. Synthesis of Small Peptide Nanogels Using Radiation Crosslinking as a Platform for Nano-Imaging Agents for Pancreatic Cancer Diagnosis. Pharmaceutics 2022; 14:2400. [PMID: 36365217 PMCID: PMC9696042 DOI: 10.3390/pharmaceutics14112400] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/01/2022] [Accepted: 11/04/2022] [Indexed: 08/22/2023] Open
Abstract
Nanoparticle-based drug delivery systems (DDS) have been developed as effective diagnostic and low-dose imaging agents. Nano-imaging agents with particles greater than 100 nm are difficult to accumulate in pancreatic cancer cells, making high-intensity imaging of pancreatic cancer challenging. Peptides composed of histidine and glycine were designed and synthesized. Additionally, aqueous peptide solutions were irradiated with γ-rays to produce peptide nanogels with an average size of 25-53 nm. The mechanisms underlying radiation-mediated peptide crosslinking were investigated by simulating peptide particle formation based on rate constants. The rate constants for reactions between peptides and reactive species produced by water radiolysis were measured using pulse radiolysis. HGGGHGGGH (H9, H-histidine; G-glycine) particles exhibited a smaller size, as well as high formation yield, stability, and biodegradability. These particles were labeled with fluorescent dye to change their negative surface potential and enhance their accumulation in pancreatic cancer cells. Fluorescent-labeled H9 particles accumulated in PANC1 human pancreatic cancer cells, demonstrating that these particles are effective nano-imaging agents for intractable cancers.
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Affiliation(s)
- Atsushi Kimura
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
| | - Tadashi Arai
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjintyo, Kiryu 376-8515, Gunma, Japan
| | - Miho Ueno
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjintyo, Kiryu 376-8515, Gunma, Japan
| | - Kotaro Oyama
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
| | - Hao Yu
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
- Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22 Shirakata-Shirane, Tokai-mura, Naka-gun 319-1188, Ibaraki, Japan
| | - Shinichi Yamashita
- Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22 Shirakata-Shirane, Tokai-mura, Naka-gun 319-1188, Ibaraki, Japan
| | - Yudai Otome
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjintyo, Kiryu 376-8515, Gunma, Japan
| | - Mitsumasa Taguchi
- Takasaki Advanced Radiation Research Institute (TARRI), National Institutes for Quantum Science and Technology (QST), 1233 Watanuki-Machi, Takasaki 370-1207, Gunma, Japan
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjintyo, Kiryu 376-8515, Gunma, Japan
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2
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Bin Mohd Yusof MS, Siow JX, Yang N, Chan WX, Loh ZH. Spectroscopic observation and ultrafast coherent vibrational dynamics of the aqueous phenylalanine radical. Phys Chem Chem Phys 2022; 24:2800-2812. [PMID: 35048090 DOI: 10.1039/d1cp04326a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phenylalanine radical (Phe˙) has been proposed to mediate biological electron transport (ET) and exhibit long-lived electronic coherences following attosecond photoionization. However, the coupling of ultrafast structural reorganization to the oxidation/ionization of biomolecules such as phenylalanine remains unexplored. Moreover, studies of ET involving Phe˙ are hindered by its hitherto unobserved electronic spectrum. Here, we report the spectroscopic observation and coherent vibrational dynamics of aqueous Phe˙, prepared by sub-6 fs photodetachment of phenylalaninate anions. Sub-picosecond transient absorption spectroscopy reveals the ultraviolet absorption signature of Phe˙. Ultrafast structural reorganization drives coherent vibrational motion involving nine fundamental frequencies and one overtone. DFT calculations rationalize the absence of the decarboxylation reaction, a photodegradation pathway previously identified for Phe˙. Our findings guide the interpretation of future attosecond experiments aimed at elucidating coherent electron motion in photoionized aqueous biomolecules and pave way for the spectroscopic identification of Phe˙ in studies of biological ET.
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Affiliation(s)
- Muhammad Shafiq Bin Mohd Yusof
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | - Jing Xuan Siow
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | - Ningchen Yang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | - Wei Xin Chan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | - Zhi-Heng Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
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3
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Bhangu SK, Ashokkumar M, Cavalieri F. Synthesis of bio-functional nanoparticles from sono-responsive amino acids using high frequency ultrasound. ULTRASONICS SONOCHEMISTRY 2020; 63:104967. [PMID: 31978711 DOI: 10.1016/j.ultsonch.2020.104967] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/03/2020] [Accepted: 01/09/2020] [Indexed: 05/07/2023]
Abstract
A simple, one-pot high frequency ultrasonication (490 kHz) methodology to convert hydrophobic and amphipathic amino acids into nanostructures was investigated. The approach involved the oxidative coupling of aromatic amino acids (phenylalanine and tryptophan) in aqueous solutions to form high molecular weight dimers and oligomers. The role of cavitation bubble surface and ultrasonic power to trigger the out-of-equilibrium self-assembly of dimers and trimers to spherical and uniform nanostructures with controlled size has been discussed. The synthesized particles exhibited fluorescence in blue, green and red spectral regions and a strong antioxidant activity.
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Affiliation(s)
| | | | - Francesca Cavalieri
- School of Science, RMIT University, Melbourne, VIC 3001, Australia; Dipartimento di Scienze e Tecnologie Chimiche, Universita' degli Studi di Roma "Tor Vergata", via della ricerca scientifica 1, 00133 Rome, Italy.
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4
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Kovacs P, Szelig L, Kun S, Loibl C, Woth GL, Molnar GA, Wittmann I, Bogar L, Miseta A, Csontos C. Changes of para-, meta- and ortho-tyrosine over time in burned patients. Immunobiology 2020; 225:151917. [PMID: 32147189 DOI: 10.1016/j.imbio.2020.151917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 02/08/2020] [Accepted: 02/20/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE Serious burn injury leads to oxidative stress resulting in production of meta- and ortho-tyrosine, while para-tyrosine is the physiological isoform. Our aim was to investigate the metabolism of these tyrosine isoforms following major burn injury. METHODS Fifteen patients requiring intensive care were followed for 5 consecutive days after major burn injury. Serum and urine concentrations of para-, meta-, and ortho-tyrosine were measured with high performance liquid chromatography. Fifteen healthy matching individuals were invited as control group. RESULTS Median serum concentration of normal isoform para-tyrosine decreased in burned patients between days 2 and 5 (p < 0.01). Mean meta-, and ortho-tyrosine levels were significantly higher in patients compared to controls in the same time period (p < 0.05). Renal excretion of para-tyrosine increased significantly in our observation period (p < 0.01). CONCLUSIONS Pathologic isoforms of tyrosine accumulate in serum meanwhile the level of normal isoform decreases possibly due to belated enhanced renal excretion or, to decreased synthesis after major burn injury.
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Affiliation(s)
- Patricia Kovacs
- Department of Anaesthesiology and Intensive Care, University of Pécs, Medical School, Hungary.
| | - Livia Szelig
- Department of Anaesthesiology and Intensive Care, University of Pécs, Medical School, Hungary.
| | - Szilard Kun
- Department of Medicine and Nephrological Centre, University of Pécs, Medical School, Hungary.
| | - Csaba Loibl
- Department of Anaesthesiology and Intensive Care, University of Pécs, Medical School, Hungary.
| | - Gabor Laszlo Woth
- Department of Anaesthesiology and Intensive Care, University of Pécs, Medical School, Hungary.
| | - Gergo A Molnar
- Department of Medicine and Nephrological Centre, University of Pécs, Medical School, Hungary.
| | - Istvan Wittmann
- Department of Medicine and Nephrological Centre, University of Pécs, Medical School, Hungary.
| | - Lajos Bogar
- Department of Anaesthesiology and Intensive Care, University of Pécs, Medical School, Hungary.
| | - Attila Miseta
- Department of Laboratory Medicine, University of Pécs, Medical School, Hungary.
| | - Csaba Csontos
- Department of Anaesthesiology and Intensive Care, University of Pécs, Medical School, Hungary.
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5
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Suarez M, Caicedo C, Morales J, López EF, Torres YÁ. Design, theoretical study and correlation of the electronic and optical properties of diethynylphenylthiophene as photovoltaic materials. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Csire G, Canabady-Rochelle L, Averlant-Petit MC, Selmeczi K, Stefan L. Both metal-chelating and free radical-scavenging synthetic pentapeptides as efficient inhibitors of reactive oxygen species generation. Metallomics 2020; 12:1220-1229. [DOI: 10.1039/d0mt00103a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The very first Fe(iii)-peptide chelators exhibiting antioxidant properties thanks to an unprecedented dual direct/indirect mode of action.
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Affiliation(s)
| | | | | | | | - Loic Stefan
- Université de Lorraine
- CNRS
- LCPM
- F-54000 Nancy
- France
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7
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Uranga J, Mujika JI, Grande-Aztatzi R, Matxain JM. Oxidation of Acid, Base, and Amide Side-Chain Amino Acid Derivatives via Hydroxyl Radical. J Phys Chem B 2018; 122:4956-4971. [PMID: 29676577 DOI: 10.1021/acs.jpcb.7b12450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Hydroxyl radical (•OH) is known to be highly reactive. Herein, we analyze the oxidation of acid (Asp and Glu), base (Arg and Lys), and amide (Asn and Gln) containing amino acid derivatives by the consecutive attack of two •OH. In this work, we study the reaction pathway by means of density functional theory. The oxidation mechanism is divided into two steps: (1) the first •OH can abstract a H atom or an electron, leading to a radical amino acid derivative, which is the intermediate of the reaction and (2) the second •OH can abstract another H atom or add itself to the formed radical, rendering the final oxidized products. The studied second attack of •OH is applicable to situations where high concentration of •OH is found, e.g., in vitro. Carbonyls are the best known oxidation products for these reactions. This work includes solvent dielectric and confirmation's effects of the reaction, showing that both are negligible. Overall, the most favored intermediates of the oxidation process at the side chain correspond to the secondary radicals stabilized by hyperconjugation. Intermediates show to be more stable in those cases where the spin density of the unpaired electron is lowered. Alcohols formed at the side chains are the most favored products, followed by the double-bond-containing ones. Interestingly, Arg and Lys side-chain scission leads to the most favored carbonyl-containing oxidation products, in line with experimental results.
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Affiliation(s)
- Jon Uranga
- Kimika Fakultatea-Chemistry Department , Euskal Herriko Unibertsitatea (UPV/EHU) , P.K. 1072 , 20080 Donostia , Euskadi , Spain.,Donostia International Physics Center (DIPC) , Manuel Lardizabal 4 , 20018 Donostia , Euskadi , Spain
| | - Jon I Mujika
- Donostia International Physics Center (DIPC) , Manuel Lardizabal 4 , 20018 Donostia , Euskadi , Spain
| | - Rafael Grande-Aztatzi
- Donostia International Physics Center (DIPC) , Manuel Lardizabal 4 , 20018 Donostia , Euskadi , Spain
| | - Jon M Matxain
- Kimika Fakultatea-Chemistry Department , Euskal Herriko Unibertsitatea (UPV/EHU) , P.K. 1072 , 20080 Donostia , Euskadi , Spain.,Donostia International Physics Center (DIPC) , Manuel Lardizabal 4 , 20018 Donostia , Euskadi , Spain
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8
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Szélig L, Kun S, Woth G, Molnár GA, Zrínyi Z, Kátai E, Lantos J, Wittmann I, Bogár L, Miseta A, Csontos C. Time courses of changes of para-, meta-, and ortho-tyrosine in septic patients: A pilot study. Redox Rep 2016; 21:180-9. [PMID: 26193242 DOI: 10.1179/1351000215y.0000000028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
OBJECTIVES Sepsis is associated with oxidative stress. Due to oxidative stress, three tyrosine isoforms, para-, meta-, and ortho-tyrosine (p-, m-, and o-Tyr), can be formed non-enzymatically in smaller amounts. p-Tyr is mainly formed physiologically in the kidneys through the activity of the phenylalanine hydroxylase enzyme. The three tyrosine isoforms may undergo different renal handling. METHODS Twenty septic patients were involved in the study and 25 healthy individuals served as controls. Blood and urine levels of p-, m-, and o-Tyr were measured on admission and four consecutive days. RESULTS Serum m-Tyr levels were higher in septic patients than in controls on days 2 (P = 0.031) and 3 (P = 0.035). Serum p-Tyr levels were lower in the cases than in controls on days 1 (P = 0.005) and 2 (P = 0.040), and subsequently normalized due to a day-by-day elevation (P = 0.002). The tendency of urinary m-Tyr concentration was decreasing (P = 0.041), while that of urinary p-Tyr concentration was increasing (P = 0.001). Fractional excretion of m-Tyr (FEm-Tyr) showed a decreasing tendency (P = 0.009), and was, on all days, higher than FEp-Tyr, which remained near-normal, less than 4%. Procalcitonin showed significant correlation with FEm-Tyr (r = 0.454; P < 0.001). DISCUSSION Our data suggest that the oxidative stress marker m-Tyr and physiologic p-Tyr may be handled differently in septic patients. The excretion of m-Tyr correlates with inflammation. m-Tyr may be actively secreted or produced in the kidney in some patients, whereas the decreased serum level of p-Tyr is a consequence of diminished renal production and not of renal loss.
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Affiliation(s)
- Lívia Szélig
- a Department of Anaesthesia and Intensive Care, Faculty of Medicine , University of Pécs , Akác utca 1, H-7632 Hungary
| | - Szilárd Kun
- b 2nd Department of Medicine and Nephrological Centre, Faculty of Medicine , University of Pécs , Pacsirta utca 1, H-7624 Hungary
| | - Gábor Woth
- a Department of Anaesthesia and Intensive Care, Faculty of Medicine , University of Pécs , Akác utca 1, H-7632 Hungary
| | - Gergő A Molnár
- b 2nd Department of Medicine and Nephrological Centre, Faculty of Medicine , University of Pécs , Pacsirta utca 1, H-7624 Hungary
| | - Zita Zrínyi
- c Department of Laboratory Medicine, Faculty of Medicine , University of Pécs , Ifjúság út 13, H-7624 Hungary
| | - Emese Kátai
- c Department of Laboratory Medicine, Faculty of Medicine , University of Pécs , Ifjúság út 13, H-7624 Hungary
| | - János Lantos
- d Department of Surgical Research and Techniques, Faculty of Medicine , University of Pécs , Kodály Z. utca 20, H-7624 Hungary
| | - István Wittmann
- b 2nd Department of Medicine and Nephrological Centre, Faculty of Medicine , University of Pécs , Pacsirta utca 1, H-7624 Hungary
| | - Lajos Bogár
- a Department of Anaesthesia and Intensive Care, Faculty of Medicine , University of Pécs , Akác utca 1, H-7632 Hungary
| | - Attila Miseta
- c Department of Laboratory Medicine, Faculty of Medicine , University of Pécs , Ifjúság út 13, H-7624 Hungary
| | - Csaba Csontos
- a Department of Anaesthesia and Intensive Care, Faculty of Medicine , University of Pécs , Akác utca 1, H-7632 Hungary
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9
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Chen G, Xu C, Huang X, Ye J, Gu L, Li G, Tang Z, Wu B, Yang H, Zhao Z, Zhou Z, Fu G, Zheng N. Interfacial electronic effects control the reaction selectivity of platinum catalysts. NATURE MATERIALS 2016; 15:564-9. [PMID: 26808458 DOI: 10.1038/nmat4555] [Citation(s) in RCA: 249] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 12/22/2015] [Indexed: 05/03/2023]
Abstract
Tuning the electronic structure of heterogeneous metal catalysts has emerged as an effective strategy to optimize their catalytic activities. By preparing ethylenediamine-coated ultrathin platinum nanowires as a model catalyst, here we demonstrate an interfacial electronic effect induced by simple organic modifications to control the selectivity of metal nanocatalysts during catalytic hydrogenation. This we apply to produce thermodynamically unfavourable but industrially important compounds, with ultrathin platinum nanowires exhibiting an unexpectedly high selectivity for the production of N-hydroxylanilines, through the partial hydrogenation of nitroaromatics. Mechanistic studies reveal that the electron donation from ethylenediamine makes the surface of platinum nanowires highly electron rich. During catalysis, such an interfacial electronic effect makes the catalytic surface favour the adsorption of electron-deficient reactants over electron-rich substrates (that is, N-hydroxylanilines), thus preventing full hydrogenation. More importantly, this interfacial electronic effect, achieved through simple organic modifications, may now be used for the optimization of commercial platinum catalysts.
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Affiliation(s)
- Guangxu Chen
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chaofa Xu
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xiaoqing Huang
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jinyu Ye
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
| | - Lin Gu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Gang Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Zichao Tang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Binghui Wu
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Huayan Yang
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zipeng Zhao
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhiyou Zhou
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
| | - Gang Fu
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Nanfeng Zheng
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Engineering Research Center for Nano-Preparation Technology of Fujian Province, Xiamen 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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10
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Ipson BR, Fisher AL. Roles of the tyrosine isomers meta-tyrosine and ortho-tyrosine in oxidative stress. Ageing Res Rev 2016; 27:93-107. [PMID: 27039887 DOI: 10.1016/j.arr.2016.03.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/20/2016] [Accepted: 03/30/2016] [Indexed: 12/11/2022]
Abstract
The damage to cellular components by reactive oxygen species, termed oxidative stress, both increases with age and likely contributes to age-related diseases including Alzheimer's disease, atherosclerosis, diabetes, and cataract formation. In the setting of oxidative stress, hydroxyl radicals can oxidize the benzyl ring of the amino acid phenylalanine, which then produces the abnormal tyrosine isomers meta-tyrosine or ortho-tyrosine. While elevations in m-tyrosine and o-tyrosine concentrations have been used as a biological marker of oxidative stress, there is emerging evidence from bacterial, plant, and mammalian studies demonstrating that these isomers, particularly m-tyrosine, directly produce adverse effects to cells and tissues. These new findings suggest that the abnormal tyrosine isomers could in fact represent mediators of the effects of oxidative stress. Consequently the accumulation of m- and o-tyrosine may disrupt cellular homeostasis and contribute to disease pathogenesis, and as result, effective defenses against oxidative stress can encompass not only the elimination of reactive oxygen species but also the metabolism and ultimately the removal of the abnormal tyrosine isomers from the cellular amino acid pool. Future research in this area is needed to clarify the biologic mechanisms by which the tyrosine isomers damage cells and disrupt the function of tissues and organs and to identify the metabolic pathways involved in removing the accumulated isomers after exposure to oxidative stress.
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Affiliation(s)
- Brett R Ipson
- MD/PhD Program, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; Department of Cell and Structural Biology, Graduate School of Biomedical Sciences, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; Center for Healthy Aging, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Alfred L Fisher
- Center for Healthy Aging, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; Department of Medicine, Division of Geriatrics, Gerontology, and Palliative Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States; GRECC, South Texas VA Health Care System, San Antonio, TX, United States.
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11
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Khosravian N, Kamaraj B, Neyts EC, Bogaerts A. Structural modification of P-glycoprotein induced by OH radicals: Insights from atomistic simulations. Sci Rep 2016; 6:19466. [PMID: 26857381 PMCID: PMC4746567 DOI: 10.1038/srep19466] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 12/09/2015] [Indexed: 11/09/2022] Open
Abstract
This study reports on the possible effects of OH radical impact on the transmembrane domain 6 of P-glycoprotein, TM6, which plays a crucial role in drug binding in human cells. For the first time, we employ molecular dynamics (MD) simulations based on the self-consistent charge density functional tight binding (SCC-DFTB) method to elucidate the potential sites of fragmentation and mutation in this domain upon impact of OH radicals, and to obtain fundamental information about the underlying reaction mechanisms. Furthermore, we apply non-reactive MD simulations to investigate the long-term effect of this mutation, with possible implications for drug binding. Our simulations indicate that the interaction of OH radicals with TM6 might lead to the breaking of C-C and C-N peptide bonds, which eventually cause fragmentation of TM6. Moreover, according to our simulations, the OH radicals can yield mutation in the aromatic ring of phenylalanine in TM6, which in turn affects its structure. As TM6 plays an important role in the binding of a range of cytotoxic drugs with P-glycoprotein, any changes in its structure are likely to affect the response of the tumor cell in chemotherapy. This is crucial for cancer therapies based on reactive oxygen species, such as plasma treatment.
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Affiliation(s)
- N Khosravian
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - B Kamaraj
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - E C Neyts
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
| | - A Bogaerts
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium
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12
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Uranga J, Lakuntza O, Ramos-Cordoba E, Matxain JM, Mujika JI. A computational study of radical initiated protein backbone homolytic dissociation on all natural amino acids. Phys Chem Chem Phys 2016; 18:30972-30981. [DOI: 10.1039/c6cp06529e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydroxyl radical (˙OH) is known to be one of the most reactive species. The attack of this radical onto the backbone of all natural amino acids is investigated.
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Affiliation(s)
- Jon Uranga
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Oier Lakuntza
- Institut Catala d'Investigacio Quimica (ICIQ)
- 43007 Tarragona
- Spain
| | - Eloy Ramos-Cordoba
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
- Department of Chemistry
| | - Jon M. Matxain
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Jon I. Mujika
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
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Insulin Therapy of Nondiabetic Septic Patients Is Predicted by para-Tyrosine/Phenylalanine Ratio and by Hydroxyl Radical-Derived Products of Phenylalanine. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:839748. [PMID: 26576228 PMCID: PMC4630663 DOI: 10.1155/2015/839748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 03/03/2015] [Indexed: 12/29/2022]
Abstract
Hydroxyl radical converts Phe to para-, meta-, and ortho-Tyr (p-Tyr, m-Tyr, o-Tyr), while Phe is converted enzymatically to p-Tyr in the kidney and could serve as substrate for gluconeogenesis. Pathological isoforms m- and o-Tyr are supposed to be involved in development of hormone resistances. Role of Phe and the three Tyr isoforms in influencing insulin need was examined in 25 nondiabetic septic patients. Daily insulin dose (DID) and insulin-glucose product (IGP) were calculated. Serum and urinary levels of Phe and Tyr isoforms were determined using a rpHPLC-method. Urinary m-Tyr/p-Tyr ratio was higher in patients with DID and IGP over median compared to those below median (P = 0.005 and P = 0.01, resp.). Urinary m-Tyr and m-Tyr/p-Tyr ratio showed positive correlation with DID (P = 0.009 and P = 0.023, resp.) and with IGP (P = 0.004 and P = 0.008, resp.). Serum Phe was a negative predictor, while serum p-Tyr/Phe ratio was positive predictor of both DID and IGP. Urinary m-Tyr and urinary m-Tyr/p-Tyr, o-Tyr/p-Tyr, and (m-Tyr+o-Tyr)/p-Tyr ratios were positive predictors of both DID and IGP. Phe and Tyr isoforms have a predictive role in carbohydrate metabolism of nondiabetic septic patients. Phe may serve as substrate for renal gluconeogenesis via enzymatically produced p-Tyr, while hydroxyl radical derived Phe products may interfere with insulin action.
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14
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Salamone M, Basili F, Bietti M. Reactivity and selectivity patterns in hydrogen atom transfer from amino acid C-H bonds to the cumyloxyl radical: polar effects as a rationale for the preferential reaction at proline residues. J Org Chem 2015; 80:3643-50. [PMID: 25774567 DOI: 10.1021/acs.joc.5b00549] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Absolute rate constants for hydrogen atom transfer (HAT) from the C-H bonds of N-Boc-protected amino acids to the cumyloxyl radical (CumO(•)) were measured by laser flash photolysis. With glycine, alanine, valine, norvaline, and tert-leucine, HAT occurs from the α-C-H bonds, and the stability of the α-carbon radical product plays a negligible role. With leucine, HAT from the α- and γ-C-H bonds was observed. The higher kH value measured for proline was explained in terms of polar effects, with HAT that predominantly occurs from the δ-C-H bonds, providing a rationale for the previous observation that proline residues represent favored HAT sites in the reactions of peptides and proteins with (•)OH. Preferential HAT from proline was also observed in the reactions of CumO(•) with the dipeptides N-BocProGlyOH and N-BocGlyGlyOH. The rate constants measured for CumO(•) were compared with the relative rates obtained previously for the corresponding reactions of different hydrogen-abstracting species. The behavior of CumO(•) falls between those observed for the highly reactive radicals Cl(•) and (•)OH and the significantly more stable Br(•). Taken together, these results provide a general framework for the description of the factors that govern reactivity and selectivity patterns in HAT reactions from amino acid C-H bonds.
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Affiliation(s)
- Michela Salamone
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
| | - Federica Basili
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
| | - Massimo Bietti
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
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15
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Salamone M, Basili F, Mele R, Cianfanelli M, Bietti M. Reactions of the cumyloxyl radical with secondary amides. The influence of steric and stereoelectronic effects on the hydrogen atom transfer reactivity and selectivity. Org Lett 2014; 16:6444-7. [PMID: 25474754 DOI: 10.1021/ol503277r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A time-resolved kinetic study of the hydrogen atom transfer (HAT) reactions from secondary alkanamides to the cumyloxyl radical was carried out in acetonitrile. HAT predominantly occurs from the N-alkyl α-C-H bonds, and a >60-fold decrease in kH was observed by increasing the steric hindrance of the acyl and N-alkyl groups. The role of steric and stereoelectronic effects on the reactivity and selectivity is discussed in the framework of HAT reactions from peptides.
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Affiliation(s)
- Michela Salamone
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata" , Via della Ricerca Scientifica, 1 I-00133 Rome, Italy
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16
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Iuga C, Solís C, Alvarez-Idaboy JR, Martínez MÁ, Mondragón MA, Vivier-Bunge A. A theoretical and experimental evaluation of imidazolium-based ionic liquids for atmospheric mercury capture. J Mol Model 2014; 20:2186. [DOI: 10.1007/s00894-014-2186-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 02/24/2014] [Indexed: 11/27/2022]
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17
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Kun S, Mikolás E, Molnár GA, Sélley E, Laczy B, Csiky B, Kovács T, Wittmann I. Association of plasma ortho-tyrosine/para-tyrosine ratio with responsiveness of erythropoiesis-stimulating agent in dialyzed patients. Redox Rep 2014; 19:190-8. [PMID: 24693974 DOI: 10.1179/1351000214y.0000000090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Objectives Patients with end-stage renal failure (ESRF) treated with erythropoiesis-stimulating agents (ESAs) are often ESA-hyporesponsive associated with free radical production. Hydroxyl free radical converts phenylalanine into ortho-tyrosine, while physiological isomer para-tyrosine is formed enzymatically, mainly in the kidney. Production of 'para-tyrosine' is decreased in ESRF and it can be replaced by ortho-tyrosine in proteins. Our aim was to study the role of tyrosines in ESA-responsiveness. Methods Four groups of volunteers were involved in our cross-sectional study: healthy volunteers (CONTR; n = 16), patients on hemodialysis without ESA-treatment (non-ESA-HD; n = 8), hemodialyzed patients with ESA-treatment (ESA-HD; n = 40), and patients on continuous peritoneal dialysis (CAPD; n = 21). Plasma ortho-, para-tyrosine, and phenylalanine levels were detected using a high performance liquid chromatography (HPLC)-method. ESA-demand was expressed by ESA-dose, ESA-dose/body weight, and erythropoietin resistance index1 (ERI1, weekly ESA-dose/body weight/hemoglobin). Results We found significantly lower para-tyrosine levels in all groups of dialyzed patients when compared with control subjects, while in contrast ortho-tyrosine levels and ortho-tyrosine/para-tyrosine ratio were comparatively significantly higher in dialyzed patients. Among groups of dialyzed patients the ortho-tyrosine level and ortho-tyrosine/para-tyrosine ratio were significantly higher in ESA-HD than in the non-ESA-HD and CAPD groups. There was a correlation between weekly ESA-dose/body weight, ERI1, and ortho-tyrosine/para-tyrosine ratio (r = 0.441, P = 0.001; r = 0.434, P = 0.001, respectively). Our most important finding was that the ortho-tyrosine/para-tyrosine ratio proved to be an independent predictor of ERI1 (β = 0.330, P = 0.016). In these multivariate regression models most of the known predictors of ESA-hyporesponsiveness were included. Discussion Our findings may suggest that elevation of the ratio of ortho-tyrosine/para-tyrosine could be responsible for decreased ESA-responsiveness in dialyzed patients.
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18
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Caicedo C, Iuga C, Castañeda-Arriaga R, Alvarez-Idaboy JR. Antioxidant activity of selected natural polyphenolic compounds from soybean via peroxyl radical scavenging. RSC Adv 2014. [DOI: 10.1039/c4ra04758c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Excellent antioxidantsviaSPLET in aqueous solution, moderate antioxidantsviaHAT in lipid medium.
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Affiliation(s)
- Carolina Caicedo
- Departamento de Física y Química Teórica
- Facultad de Química
- Universidad Nacional Autónoma de México. Circuito Exterior SN. Ciudad Universitaria
- C.P. 04510 Coyoacán, México
| | - Cristina Iuga
- Universidad Autónoma Metropolitana-Xochimilco
- 04960 México, Mexico
| | - Romina Castañeda-Arriaga
- Departamento de Física y Química Teórica
- Facultad de Química
- Universidad Nacional Autónoma de México. Circuito Exterior SN. Ciudad Universitaria
- C.P. 04510 Coyoacán, México
| | - J. Raúl Alvarez-Idaboy
- Departamento de Física y Química Teórica
- Facultad de Química
- Universidad Nacional Autónoma de México. Circuito Exterior SN. Ciudad Universitaria
- C.P. 04510 Coyoacán, México
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19
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Medina ME, Iuga C, Álvarez-Idaboy JR. Antioxidant activity of fraxetin and its regeneration in aqueous media. A density functional theory study. RSC Adv 2014. [DOI: 10.1039/c4ra08394f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fraxetin is an excellent and versatile antioxidant in aqueous media. In addition it regenerates, scavenging two radical equivalents per cycle.
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Affiliation(s)
- M. E. Medina
- Departamento de Física y Química Teórica
- Facultad de Química
- Universidad Nacional Autónoma de México
- México, Mexico
| | - C. Iuga
- Departamento de Sistemas Biológicos
- Universidad Autónoma Metropolitana-Xochimilco
- 04960 México, Mexico
| | - J. R. Álvarez-Idaboy
- Departamento de Física y Química Teórica
- Facultad de Química
- Universidad Nacional Autónoma de México
- México, Mexico
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20
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Signorelli S, Coitiño EL, Borsani O, Monza J. Molecular mechanisms for the reaction between (˙)OH radicals and proline: insights on the role as reactive oxygen species scavenger in plant stress. J Phys Chem B 2013; 118:37-47. [PMID: 24328335 DOI: 10.1021/jp407773u] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The accumulation of proline (Pro) and overproduction of reactive oxygen species (ROS) by plants exposed to stress is well-documented. In vitro assays show that enzyme inactivation by hydroxyl radicals ((•)OH) can be avoided in the presence of Pro, suggesting this amino acid might act as a (•)OH scavenger. Although production of hydroxyproline (Hyp) has been hypothesized in connection with such antioxidant activity, no evidence on the detailed mechanism of scavenging has been reported. To elucidate whether and how Hyp might be produced, we used density functional theory calculations coupled to a polarizable continuum model to explore 27 reaction channels including H-abstraction by (•)OH and (•)OH/H2O addition. The structure and energetics of stable species and transition states for each reaction channel were characterized at the PCM-(U)M06/6-31G(d,p) level in aqueous solution. Evidence is found for a main pathway in which Pro scavenges (•)OH by successive H-abstractions (ΔG(‡,298) = 4.1 and 7.5 kcal mol(-1)) to yield 3,4-Δ-Pro. A companion pathway with low barriers yielding Δ(1)-pyrroline-5-carboxylate (P5C) is also supported, linking with 5-Hyp through hydration. However, this connection remains unlikely in stressed plants because P5C would be efficiently recycled to Pro (contributing to its accumulation) by P5C reductase, hypothesis coined here as the "Pro-Pro cycle".
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Affiliation(s)
- Santiago Signorelli
- Laboratorio de Bioquímica, Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República , Av. E. Garzón 780, CP 12900 Montevideo, Uruguay
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21
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Pérez-González A, Galano A. On the hydroperoxyl radical scavenging activity of two Edaravone derivatives: mechanism and kinetics. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Adriana Pérez-González
- Departamento de Quimica, Division de Ciencias Basicas e Ingenieria; Universidad Autonoma Metropolitana-Iztapalapa; Av. San Rafael Atlixco No.186, Col. Vicentina; CP 09340; Mexico; D.F.; Mexico
| | - Annia Galano
- Departamento de Quimica, Division de Ciencias Basicas e Ingenieria; Universidad Autonoma Metropolitana-Iztapalapa; Av. San Rafael Atlixco No.186, Col. Vicentina; CP 09340; Mexico; D.F.; Mexico
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22
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Medina ME, Iuga C, Alvarez-Idaboy JR. Antioxidant activity of propyl gallate in aqueous and lipid media: a theoretical study. Phys Chem Chem Phys 2013; 15:13137-46. [DOI: 10.1039/c3cp51644j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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Iuga C, Alvarez-Idaboy JR, Vivier-Bunge A. ROS initiated oxidation of dopamine under oxidative stress conditions in aqueous and lipidic environments. J Phys Chem B 2011; 115:12234-46. [PMID: 21919526 PMCID: PMC3198543 DOI: 10.1021/jp206347u] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 09/14/2011] [Indexed: 11/29/2022]
Abstract
Dopamine is known to be an efficient antioxidant and to protect neurocytes from oxidative stress by scavenging free radicals. In this work, we have carried out a systematic quantum chemistry and computational kinetics study on the reactivity of dopamine toward hydroxyl (•OH) and hydroperoxyl (•OOH) free radicals in aqueous and lipidic simulated biological environments, within the density functional theory framework. Rate constants and branching ratios for the different paths contributing to the overall reaction, at 298 K, are reported. For the reactivity of dopamine toward hydroxyl radicals, in water at physiological pH, the main mechanism of the reaction is proposed to be the sequential electron proton transfer (SEPT), whereas in the lipidic environment, hydrogen atom transfer (HAT) and radical adduct formation (RAF) pathways contribute almost equally to the total reaction rate. In both environments, dopamine reacts with hydroxyl radicals at a rate that is diffusion-controlled. Reaction with the hydroperoxyl radical is much slower and occurs only by abstraction of any of the phenolic hydrogens. The overall rate coefficients are predicted to be 2.23 × 10(5) and 8.16 × 10(5) M(-1) s(-1), in aqueous and lipidic environment, respectively, which makes dopamine a very good •OOH, and presumably •OOR, radical scavenger.
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Affiliation(s)
- Cristina Iuga
- Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, México
| | - J. Raul Alvarez-Idaboy
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, México
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, México
| | - Annik Vivier-Bunge
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, México
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24
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Maldonado PD, Alvarez-Idaboy JR, Aguilar-González A, Lira-Rocha A, Jung-Cook H, Medina-Campos ON, Pedraza-Chaverrí J, Galano A. Role of allyl group in the hydroxyl and peroxyl radical scavenging activity of S-allylcysteine. J Phys Chem B 2011; 115:13408-17. [PMID: 21995683 DOI: 10.1021/jp208233f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
S-Allylcysteine (SAC) is the most abundant compound in aged garlic extracts, and its antioxidant properties have been demonstrated. It is known that SAC is able to scavenge different reactive species including hydroxyl radical (•OH), although its potential ability to scavenge peroxyl radical (ROO•) has not been explored. In this work the ability of SAC to scavenge ROO• was evaluated, as well as the role of the allyl group (-S-CH(2)-CH═CH(2)) in its free radical scavenging activity. Two derived compounds of SAC were prepared: S-benzylcysteine (SBC) and S-propylcysteine (SPC). Their abilities to scavenge •OH and ROO• were measured. A computational analysis was performed to elucidate the mechanism by which these compounds scavenge •OH and ROO•. SAC was able to scavenge •OH and ROO•, in a concentration-dependent way. Such activity was significantly ameliorated when the allyl group was replaced by benzyl or propyl groups. It was shown for the first time that SAC is able to scavenge ROO•.
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Affiliation(s)
- Perla D Maldonado
- Patología Vascular Cerebral, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, México DF, Mexico.
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25
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Galano A, Alvarez-Idaboy JR, Francisco-Márquez M. Physicochemical Insights on the Free Radical Scavenging Activity of Sesamol: Importance of the Acid/Base Equilibrium. J Phys Chem B 2011; 115:13101-9. [DOI: 10.1021/jp208315k] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340, México D. F. México
| | - Juan Raúl Alvarez-Idaboy
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340, México D. F. México
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, México DF 04510, México
| | - Misaela Francisco-Márquez
- UPIICSA, Instituto Politécnico Nacional, Té 950, Col. Granjas México, C. P. 08400, México D. F. México
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26
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Galano A, Francisco-Márquez M, Alvarez-Idaboy JR. Canolol: a promising chemical agent against oxidative stress. J Phys Chem B 2011; 115:8590-6. [PMID: 21619069 DOI: 10.1021/jp2022105] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The OOH radical scavenging activity of canolol (CNL) has been studied in aqueous and lipid solutions, using the density functional theory. CNL is predicted to react about 3.6 times faster in aqueous solution than in lipid media. The overall rate coefficients are predicted to be 2.5 × 10(6) and 6.8 × 10(5) M(-1) s(-1), respectively. The OOH radical scavenger activity of canolol is predicted to be similar to that of carotenes, higher than that of allicin, and much higher than that of melatonin. Branching ratios for the different channels of reaction are reported for the first time. It was found that the reactivity of canolol toward OOH radicals takes place almost exclusively by H atom transfer from the phenolic moiety in canolol, regardless of the polarity of the environment. Taking into account that the reactivity of peroxyl radicals is significantly lower than that of other reactive oxygen species, canolol is proposed to be a very good antioxidant.
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Affiliation(s)
- Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Col. Vicentina. Iztapalapa, México DF, México.
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27
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Mechanism and kinetics of the hydroxyl and hydroperoxyl radical scavenging activity of N-acetylcysteine amide. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-0958-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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28
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Galano A, Francisco-Márquez M, Alvarez-Idaboy JR. Mechanism and kinetics studies on the antioxidant activity of sinapinic acid. Phys Chem Chem Phys 2011; 13:11199-205. [PMID: 21566849 DOI: 10.1039/c1cp20722a] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The OOH radical scavenging activity of sinapinic acid (HSA) has been studied in aqueous and lipid solutions, using the Density Functional Theory. HSA is predicted to react about 32.6 times faster in aqueous solution than in lipid media. The overall rate coefficients are predicted to be 5.39 × 10(5) and 1.66 × 10(4) M(-1) s(-1), respectively. Branching ratios for the different channels of reaction are also reported for the first time, as well as the UV-Vis spectra of the main products of reaction. It was found that the reactivity of sinapinic acid towards OOH radicals takes place almost exclusively by H atom transfer from its phenolic moiety. However it was found to react via SET, at diffusion-limit controlled rate constants, with ˙OH, ˙OCCl(3) and ˙OOCCl(3) radicals. It was found that the polarity of the environment and the deprotonation of HSA in aqueous solution, both increase the reactivity of this compound towards peroxyl radicals.
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Affiliation(s)
- Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Col. Vicentina, Iztapalapa, México D F, Mexico.
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29
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León-Carmona JR, Galano A. Is Caffeine a Good Scavenger of Oxygenated Free Radicals? J Phys Chem B 2011; 115:4538-46. [DOI: 10.1021/jp201383y] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jorge Rafael León-Carmona
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Col. Vicentina C. P. 09340, México
| | - Annia Galano
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Col. Vicentina C. P. 09340, México
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30
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Galano A, Alvarez-Idaboy JR. Glutathione: mechanism and kinetics of its non-enzymatic defense action against free radicals. RSC Adv 2011. [DOI: 10.1039/c1ra00474c] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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31
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Galano A. On the direct scavenging activity of melatonin towards hydroxyl and a series of peroxyl radicals. Phys Chem Chem Phys 2011; 13:7178-88. [DOI: 10.1039/c0cp02801k] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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32
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Pérez-González A, Galano A. OH Radical Scavenging Activity of Edaravone: Mechanism and Kinetics. J Phys Chem B 2010; 115:1306-14. [DOI: 10.1021/jp110400t] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Adriana Pérez-González
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Av San Rafael Atlixco No. 186, Col. Vicentina C.P.09340, México D.F
| | - Annia Galano
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, Av San Rafael Atlixco No. 186, Col. Vicentina C.P.09340, México D.F
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33
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Galano A, Macías-Ruvalcaba NA, Medina Campos ON, Pedraza-Chaverri J. Mechanism of the OH radical scavenging activity of nordihydroguaiaretic acid: a combined theoretical and experimental study. J Phys Chem B 2010; 114:6625-35. [PMID: 20415502 DOI: 10.1021/jp912001c] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The antioxidant nordihydroguaiaretic acid (NDGA) is a plant phenolic lignan originally isolated from the creosote bush (Larrea tridentata). It has been shown that NDGA scavenges efficiently hydroxyl radicals ((*)OH). In the present paper the mechanism by which NDGA scavenges (*)OH is addressed performing a combined experimental and theoretical investigation. We found that NDGA protects, in a concentration-dependent way, bovine serum albumin and DNA from the damage induced by (*)OH generated by the Fenton reaction. In addition, the NDGA + (*)OH reaction is predicted to be diffusion-controlled. The first step of this reaction is proposed to occur mainly by a sequential electron proton transfer from NDGA to (*)OH generating a neutral radical of NDGA, which after a second oxidation step gives a diradical that after a cascade sequential complex reaction produces a cyclic compound. This cyclic product is predicted to have a UV-vis spectrum very similar to that of NDGA, making its identification by this technique very difficult. The electrochemical studies performed in water support the formation of a cyclic compound (C2) as the main product of the reaction. It is concluded that NDGA can scavenge at least two (*)OH.
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Affiliation(s)
- Annia Galano
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, 09340 City, México.
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Theoretical and experimental interpretations of phenol oxidation by the hydroxyl radical. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.06.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Galano A, Álvarez-Diduk R, Ramírez-Silva MT, Alarcón-Ángeles G, Rojas-Hernández A. Role of the reacting free radicals on the antioxidant mechanism of curcumin. Chem Phys 2009. [DOI: 10.1016/j.chemphys.2009.07.003] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Galano A, Francisco-Marquez M. Reactions of OOH Radical with β-Carotene, Lycopene, and Torulene: Hydrogen Atom Transfer and Adduct Formation Mechanisms. J Phys Chem B 2009; 113:11338-45. [DOI: 10.1021/jp904061q] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340, México D. F. México, and Laboratorio de Química Computacional, FES-Zaragoza, Universidad Nacional Autónoma de México (UNAM), C.P.09230 Iztapalapa, México, D.F., México
| | - Misaela Francisco-Marquez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340, México D. F. México, and Laboratorio de Química Computacional, FES-Zaragoza, Universidad Nacional Autónoma de México (UNAM), C.P.09230 Iztapalapa, México, D.F., México
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Francisco-Marquez M, Galano A. Role of the Sulfur Atom on the Reactivity of Methionine toward OH Radicals: Comparison with Norleucine. J Phys Chem B 2009; 113:4947-52. [DOI: 10.1021/jp900118f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Misaela Francisco-Marquez
- Departamento de Química, Universidad Autónoma Metropolitana—Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, C. P. 09340 Iztapalapa, México D. F., Mexico, and Laboratorio de Química Computacional, FES-Zaragoza, Universidad Nacional Autónoma de México (UNAM), C. P. 09230 Iztapalapa, México, D. F., Mexico
| | - Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana—Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, C. P. 09340 Iztapalapa, México D. F., Mexico, and Laboratorio de Química Computacional, FES-Zaragoza, Universidad Nacional Autónoma de México (UNAM), C. P. 09230 Iztapalapa, México, D. F., Mexico
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Cruz-Torres A, Romero-Martínez A, Galano A. Computational Study on the Antifreeze Glycoproteins as Inhibitors of Clathrate-Hydrate Formation. Chemphyschem 2008; 9:1630-5. [DOI: 10.1002/cphc.200800241] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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