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Guzman-Lopez EG, Reina M, Perez-Gonzalez A, Francisco-Marquez M, Hernandez-Ayala LF, Castañeda-Arriaga R, Galano A. CADMA-Chem: A Computational Protocol Based on Chemical Properties Aimed to Design Multifunctional Antioxidants. Int J Mol Sci 2022; 23:13246. [PMID: 36362034 PMCID: PMC9658414 DOI: 10.3390/ijms232113246] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/17/2022] [Accepted: 10/22/2022] [Indexed: 10/12/2023] Open
Abstract
A computational protocol aimed to design new antioxidants with versatile behavior is presented. It is called Computer-Assisted Design of Multifunctional Antioxidants and is based on chemical properties (CADMA-Chem). The desired multi-functionality consists of in different methods of antioxidant protection combined with neuroprotection, although the protocol can also be used to pursue other health benefits. The dM38 melatonin derivative is used as a study case to illustrate the protocol in detail. This was found to be a highly promising candidate for the treatment of neurodegeneration, in particular Parkinson's and Alzheimer's diseases. This also has the desired properties of an oral-drug, which is significantly better than Trolox for scavenging free radicals, and has chelates redox metals, prevents the ●OH production, via Fenton-like reactions, repairs oxidative damage in biomolecules (lipids, proteins, and DNA), and acts as a polygenic neuroprotector by inhibiting catechol-O-methyl transferase (COMT), acetylcholinesterase (AChE) and monoamine oxidase B (MAOB). To the best of our best knowledge, CADMA-Chem is currently the only protocol that simultaneously involves the analyses of drug-like behavior, toxicity, manufacturability, versatile antioxidant protection, and receptor-ligand binding affinities. It is expected to provide a starting point that helps to accelerate the discovery of oral drugs with the potential to prevent, or slow down, multifactorial human health disorders.
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Affiliation(s)
- Eduardo Gabriel Guzman-Lopez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | - Miguel Reina
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Adriana Perez-Gonzalez
- CONACYT-Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | | | - Luis Felipe Hernandez-Ayala
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | - Romina Castañeda-Arriaga
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | - Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
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52
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Quy PT, Dzung NA, Van Bay M, Van Bon N, Dung DM, Nam PC, Thong NM. Insights into antiradical mechanism and pro-oxidant enzyme inhibitor activity of walterolactone A/B 6- O-gallate-β-d-pyranoglucoside originating from Euonymus laxiflorus Champ. using in silico study. RSC Adv 2022; 12:29975-29982. [PMID: 36321076 PMCID: PMC9580510 DOI: 10.1039/d2ra05312h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/11/2022] [Indexed: 11/07/2022] Open
Abstract
The ability of a new compound, Wal, (walterolactone A/B 6-O-gallate-β-d-pyranoglucoside) originating from Euonymus laxiflorus Champ. as a hydroperoxyl radical scavenger and pro-oxidant enzyme inhibitor was studied in silico. Different mechanisms, reaction locations, and chemical species of Wal in aqueous solution were taken into consideration. Formal hydrogen transfer from the OH group has been discovered as the chemical process that contributes most to the antioxidant properties of Wal in nonpolar and aqueous solutions. The overall rate coefficients for polar and non-polar environments are expected to have values of 7.85 × 106 M-1 s-1 and 4.84 × 105 M-1 s-1, respectively. According to the results of the investigation, Wal has greater scavenging activity against the HOO˙ radical than the reference antioxidant Trolox at physiological pH (7.4). In addition, docking results indicate that Wal's antioxidant properties involve the inhibition of the activity of enzyme families (CP450, MP, NO, and XO) that are responsible for ROS production.
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Affiliation(s)
- Phan Tu Quy
- Department of Natural Sciences & Technology, Tay Nguyen University Buon Ma Thuot 630000 Vietnam
| | - Nguyen Anh Dzung
- Institute of Biotechnology and Environment, Tay Nguyen University Buon Ma Thuot 630000 Vietnam
| | - Mai Van Bay
- The University of Danang - University of Science and Education Danang 550000 Vietnam
| | - Nguyen Van Bon
- Institute of Biotechnology and Environment, Tay Nguyen University Buon Ma Thuot 630000 Vietnam
| | - Doan Manh Dung
- Institute of Biotechnology and Environment, Tay Nguyen University Buon Ma Thuot 630000 Vietnam
| | - Pham Cam Nam
- The University of Danang - University of Science and Technology Danang 550000 Vietnam
| | - Nguyen Minh Thong
- The University of Danang - Campus in Kon Tum 704 Phan Dinh Phung Kon Tum Vietnam
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53
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Cam Nam P, Van Bay M, Vo QV, Mechler A, Minh Thong N. Tautomerism and antioxidant power of sulfur-benzo[h]quinoline: DFT and molecular docking studies. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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54
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Thi TTV, Khoa TV, Son LL, Minh TT, Chau NDG, Kiet TT, Vinh NQ, Chien NC, Hieu LT. Phenolic content and antioxidant activity of Ophiocordyceps Sobolifera extract for renal injury prevention. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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55
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Elder J, Broome JA, Bushnell EAC. Computational Insights into the Regeneration of Ovothiol and Ergothioneine and Their Selenium Analogues by Glutathione. ACS OMEGA 2022; 7:31813-31821. [PMID: 36120043 PMCID: PMC9476190 DOI: 10.1021/acsomega.2c02506] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Ovothiol and ergothioneine are powerful antioxidants that readily react with oxidants by forming their respective disulfides. In fact, ovothiol is widely considered one of the most powerful natural antioxidants. However, for these antioxidants to be again involved in reacting with oxidants, they must be regenerated via the reduction of the disulfide bonds. In the present work, the regeneration of the antioxidants ovothiol and ergothioneine and their selenium analogues, by the closed-shell nucleophilic attack of glutathione, was investigated using density functional theory. From the calculated thermodynamic data, the attack of glutathione on OSSO and EYYE (where Y = S and/or Se) will readily occur in solution. Moreover, in comparison to the reference reaction GSH + GSSG → GSSG + GSH, all reactions are expected to be faster. Overall, the results presented herein show that the key antioxidant GSH should readily recycle ovothiol, ovoselenol, ergothioneine, and ergoseloneine from OYYO and EYYE (where Y = S and/or Se).
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56
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Hang DTN, Hoa NT, Bich HN, Mechler A, Vo QV. The hydroperoxyl radical scavenging activity of natural hydroxybenzoic acids in oil and aqueous environments: Insights into the mechanism and kinetics. PHYTOCHEMISTRY 2022; 201:113281. [PMID: 35738432 DOI: 10.1016/j.phytochem.2022.113281] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/10/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
Foods that contain hydroxybenzoic acid derivatives (HBA) include red fruits, black radish, onion, and potato peel. HBA are widely known for their anti-inflammatory, anti-cancer, and especially antioxidant capabilities; however, a comprehensive study of the mechanism and kinetics of the antiradical action of these compounds has not been performed. Here, we report a study on the mechanisms and kinetics of hydroperoxyl radical scavenging activity of HBA by density functional theory (DFT) calculations. According to the results, HBA exert low HOO• antiradical activity in the nonpolar environment with overall rate constants in the range of koverall = 5.90 × 10-6 - 4.10 × 103 M-1 s-1. However, most HBA exhibit significant HOO• antiradical activity (koverall = 105 - 108 M-1 s-1) by the single electron transfer (SET) reaction of the phenoxide anions in water at physiological pH. The overall rate constant increases with increasing pH values in the majority of the substances studied. At pH ≤ 4, gentisic acid had the best HOO• antiradical activity (log(koverall) = 3.7-4.8), however at pH > 4, the largest HOO• radical scavenging activity (log(koverall) = 4.8-9.8) was almost exclusively found for gallic and syringic acids. Salicylic and 5-sulphosalicylic acids have the lowest antiradical activity across most of the pH range. The activities of the majority of the acids in this study are faster than the reference compound Trolox. Thus, in the aqueous physiological environment, these HBA are good natural antioxidants.
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Affiliation(s)
- Do Thi Ngoc Hang
- The University of Danang - University of Technology and Education, Danang 550000, Viet Nam
| | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education, Danang 550000, Viet Nam
| | - Huynh Ngoc Bich
- The University of Danang - University of Technology and Education, Danang 550000, Viet Nam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, Victoria 3086, Australia
| | - Quan V Vo
- The University of Danang - University of Technology and Education, Danang 550000, Viet Nam.
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57
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Truong DH, Ngo TC, Nguyen THL, Dao DQ. Oxidation of l-leucine amino acid initiated by hydroxyl radical: are transition metal ions an enhancement factor? ROYAL SOCIETY OPEN SCIENCE 2022; 9:220316. [PMID: 36117865 PMCID: PMC9470255 DOI: 10.1098/rsos.220316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 08/22/2022] [Indexed: 06/10/2023]
Abstract
Hydroxyl radical (HO·) formation initiated by the Fenton-type reactions of Fe and Cu complexes of l-leucine (Leu) amino acid as well as its oxidation reaction by HO· was computationally investigated by using the density functional theory method at the M05-2X/6-311++G(3df,2pd)//M05-2X/6-311++G(d,p) level of theory in the aqueous phase. The results showed that dipole-salt is the main form of Leu in the physiological condition. Leu exhibits high chelating potential towards both Fe(III)/Fe(II) and Cu(II)/Cu(I) ions with the most favourable coordinating positions at two oxygen atoms of the -COO functional group. Furthermore, the Leu-ions complexes show a high risk of HO· formation via Fenton-like reactions, especially when ascorbate anion exists in the environment as a reducing agent. Finally, the oxidation reaction of l-leucine by HO· demonstrated a relatively high overall apparent reaction rate, k overall, being 1.18 × 109 M-1 s-1, in which formal hydrogen transfer reactions of the dipole-salt form occur as the primary mechanism. Consequently, the Leu oxidation by HO· radical can be promoted by the Fenton reaction enhancement of its transition metal complexes.
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | | | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
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58
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Boulebd H. DFT analysis of peroxyl radical scavenging capacity of Coumestrol: insights into kinetics and reaction mechanisms. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest University of Frères Mentouri Constantine 1 Constantine Algeria
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59
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Ngoc TD, Thi Ha MV, Le TN, Thi HV, Anh Nguyen TV, Mechler A, Hoa NT, Vo QV. A Potent Antioxidant Sesquiterpene, Abelsaginol, from Abelmoschus sagittifolius: Experimental and Theoretical Insights. ACS OMEGA 2022; 7:24004-24011. [PMID: 35847298 PMCID: PMC9280938 DOI: 10.1021/acsomega.2c02974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The sesquiterpenoid compound abelsaginol (AS) was successfully isolated from Abelmoschus sagittifolius for the first time. The compound was identified using NMR and MS data. The antioxidant activity of AS was also evaluated both theoretically and experimentally. AS was found to be a weak HOO• radical scavenger in organic solvents such as pentyl ethanoate and dimethyl sulfoxide (k overall = ∼ 102 M-1 s-1), in a good agreement with the results of the 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) assay. However, AS exhibited good HOO• antiradical activity in water at pH 7.40 (k overall = 9.00 × 106 M-1 s-1) through the single-electron transfer mechanism of the anion state. Further calculations also demonstrated that AS could exert good to moderate activity against CH3O•, CH3OO•, CCl3OO•, NO2, and SO4 •- radicals, with k f values from 4.00 × 103 to 1.52 × 107 M-1 s-1. However, AS exerted much lower activity against HO•, CCl3O•, NO, O2 •-, and N3 • radicals under the studied conditions. In general, the activity of AS in water at pH 7.40 is higher than that of Trolox or butylated hydroxytoluene, which are common reference antioxidants. Thus, in an aqueous physiological milieu, AS is a promising natural antioxidant.
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Affiliation(s)
- Thuc Dinh Ngoc
- Department
of Science and Technology Management, Hong
Duc University, Thanh
Hóa, Thanh Hóa 40000, Vietnam
| | - Mai Vu Thi Ha
- Department
of Science and Technology Management, Hong
Duc University, Thanh
Hóa, Thanh Hóa 40000, Vietnam
| | - Thanh Nguyen Le
- Institute
of Marine Biochemistry (IMBC), Graduate University of Science and
Technology (GUST), Vietnam Academy of Science
and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Hue Vu Thi
- Institute
of Marine Biochemistry (IMBC), Graduate University of Science and
Technology (GUST), Vietnam Academy of Science
and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Thi Van Anh Nguyen
- University
of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Adam Mechler
- Department
of Biochemistry and Chemistry, La Trobe
University, Melbourne, Victoria 3086, Australia
| | - Nguyen Thi Hoa
- The
University of Danang − University of Technology and Education, Danang 550000, Vietnam
| | - Quan V. Vo
- The
University of Danang − University of Technology and Education, Danang 550000, Vietnam
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60
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Ngo TC, Truong DH, Nguyen TTN, Quang DT, Dao DQ. On the free radical scavenging and metallic ion chelating activities of pyridoxal - Could the pro-oxidant risk be competitive? PHYTOCHEMISTRY 2022; 199:113176. [PMID: 35390394 DOI: 10.1016/j.phytochem.2022.113176] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/14/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
Primary and secondary antioxidant activities of pyridoxal have been investigated by using density functional theory (DFT) at the M05-2X level combined with 6-311++G(d,p) basis set for non-metallic atoms and LanL2DZ for metallic ions. The former has been examined by its free radical scavenging activity towards HOO●, HO●, and NO2●via different mechanisms including formal hydrogen transfer (FHT), proton transfer (PT), single electron transfer (SET), and radical adduct formation (RAF). The latter has been accomplished through its transition metal-chelating ability with Fe(III)/Fe(II) and Cu(II)/Cu(I) ions. The results show that pyridoxal illustrates as an efficient radical scavenger, especially, for HO● and NO2● in water. The overall rate constants (koverall) for the reactions with HOO●, HO●, and NO2● radicals are 1.30 × 104, 5.76 × 109, and 1.43 × 109 M-1s-1, respectively. The SET from the anionic state is the most dominant for the HOO● and NO2● scavenging reactions, while both RAF and SET contribute largely to the reaction with highly reactive HO● radicals. Moreover, the anionic form of pyridoxal demonstrates a better role as a metal chelator than the neutral. However, the pro-oxidant risks of the formed complexes could be observed if there are superoxide radical anion (O2●-) and ascorbate (Asc-) in aqueous media.
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Affiliation(s)
- Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang, 550000, Viet Nam.
| | - Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang, 550000, Viet Nam
| | | | - Duong Tuan Quang
- Department of Chemistry, University of Education, Hue University, Hue, 530000, Viet Nam.
| | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang, 550000, Viet Nam
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Spiegel M, Marino T, Prejanò M, Russo N. Antioxidant and copper-chelating power of new molecules suggested as multiple target agents against Alzheimer's disease. A theoretical comparative study. Phys Chem Chem Phys 2022; 24:16353-16359. [PMID: 35762619 DOI: 10.1039/d2cp01918c] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In this study, the scavenging activity against OOH radicals and the copper-chelating ability of two new synthesized molecules (named L1 and L2) that can act as multiple target agents against Alzheimer's disease have been investigated at the density functional theory level. The pKa and molar fractions at physiological pH have been predicted. The main antioxidant reaction mechanisms in lipid-like and water environments have been considered and the relative rate constants determined. The copper-chelating ability of the two compounds has also been explored at different coordination sites and computing the complexation kinetic constants. Results show the L1 compound is a more effective radical scavenging and copper-chelating agent than L2.
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Affiliation(s)
- Maciej Spiegel
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, I-87136 Rende, CS, Italy.
| | - Tiziana Marino
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, I-87136 Rende, CS, Italy.
| | - Mario Prejanò
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, SE-10691, Sweden
| | - Nino Russo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, I-87136 Rende, CS, Italy.
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62
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Djafarou S, Boulebd H. The radical scavenger capacity and mechanism of prenylated coumestan-type compounds: a DFT analysis. Free Radic Res 2022; 56:273-281. [PMID: 35696761 DOI: 10.1080/10715762.2022.2085097] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The antiradical capacity and mechanisms of two representative coumestan-type compounds, namely isosojagol (Iso) and phaseoul (Pha), were examined using quantum chemistry calculations and computational kinetics methods. From a thermodynamic point of view, the 18CH groups of the prenyl substituent have been found to be the most suitable sites for radical attacks via the formal hydrogen transfer (FHT) mechanism. However, the kinetic study revealed that the reaction at these CH groups is slow and does not contribute to the overall reactivity of these compounds, which the phenolic groups mainly define. The kinetic study also revealed that the studied compounds are good free radical scavengers with overall rate coefficients as high as recognized antioxidants such as carnosic acid, artepillin C, thymol, and rosefuran.
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Affiliation(s)
- Selsabil Djafarou
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria
| | - Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria
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63
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Hieu LT, Van Thi TT, Hoa NT, Mechler A, Vo QV. 7-O-Galloyltricetifavan: a promising natural radical scavenger. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211906. [PMID: 35754988 PMCID: PMC9214293 DOI: 10.1098/rsos.211906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 05/24/2022] [Indexed: 05/03/2023]
Abstract
7-O-Galloyltricetifavan (7OGT), a natural flavonoid, is isolated from the leaves of Pithecellobium clypearia. The compound exhibits a variety of biological activities. This study details the evaluation of the HOO• antiradical activity of 7OGT by quantum chemistry calculations. The HOO• trapping activity of 7OGT in the gas phase (reference state) was discovered to follow the formal hydrogen transfer mechanism with a rate constant of k = 4.58 × 108 M-1 s-1. In physiological environments, 7OGT is predicted to be an excellent HOO• radical scavenger with k overall = 2.65 × 108 and 1.40 × 104 M-1 s-1 in water and pentyl ethanoate solvents, respectively. The HOO• antiradical activity of 7OGT in water at physiological pH is approximately 2000 times that of Trolox and substantially higher than that of other well-known natural antioxidants such as trans-resveratrol or ascorbic acid. Thus, 7OGT is an excellent natural antioxidant in polar environments.
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Affiliation(s)
- Le Trung Hieu
- University of Sciences, Hue University, Thua Thien Hue 530000, Vietnam
| | - Tran Thi Van Thi
- University of Sciences, Hue University, Thua Thien Hue 530000, Vietnam
| | - Nguyen Thi Hoa
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, Victoria 3086, Australia
| | - Quan V. Vo
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
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64
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Trung NQ, Mechler A, Hoa NT, Vo QV. Calculating bond dissociation energies of X-H (X=C, N, O, S) bonds of aromatic systems via density functional theory: a detailed comparison of methods. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220177. [PMID: 35706655 PMCID: PMC9174704 DOI: 10.1098/rsos.220177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/06/2022] [Indexed: 05/03/2023]
Abstract
In this study, the performance of 17 different density functional theory functionals was compared for the calculation of the bond dissociation energy (BDE) values of X-H (X=C, N, O, S) bonds of aromatic compounds. The effect of the size of the basis set (expansions of 6-31(G)) was also assessed for the initial geometry and zero-point energy calculations, followed by the single-point BDE calculations with different model chemistries with the 6-311 + (3df,2p) basis set. It was found that the size of the basis set for geometry optimization has a much smaller effect on the accuracy of BDE than the choice of functional for the following single-point calculations. The M06-2X, M05-2X and M08-HX functionals yielded highly accurate BDE values compared to experimental data (with the average mean unsigned error MUE = 1.2-1.5 kcal mol-1), performing better than any of the other functionals. The results suggest that geometry optimization may be performed with B3LYP functional and a small basis set, whereas the M06-2X, M05-2X and M08-HX density functionals with a suitably large basis set offer the best method for calculating BDEs of ArX-H (X=C, N, O, S) bonds.
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Affiliation(s)
- Nguyen Quang Trung
- Department of Chemistry, The University of Danang - University of Science and Education, Da Nang 550000, Vietnam
- Quality Assurance and Testing Center 2, Danang 550000, Vietnam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, Victoria 3086, Australia
| | - Nguyen Thi Hoa
- Academic Affairs, The University of Danang - University of Technology and Education, Danang 550000, Vietnam
| | - Quan V. Vo
- Faculty of Chemical Technology – Environment, The University of Danang - University of Technology and Education, Danang 550000, Vietnam
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65
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Nuha D, Evren AE, Çiyanci ZŞ, Temel HE, Akalin Çiftçi G, Yurttaş L. Synthesis, density functional theory calculation, molecular docking studies, and evaluation of novel 5-nitrothiophene derivatives for anticancer activity. Arch Pharm (Weinheim) 2022; 355:e2200105. [PMID: 35584987 DOI: 10.1002/ardp.202200105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 12/29/2022]
Abstract
Within the scope of this study, new 2-{2-[(5-nitrothiophen-2-yl)methylene]hydrazinyl}thiazole derivatives (2a-j) were synthesized and investigated for their potential anticancer and enzyme inhibition activities. Spectroscopic techniques were used to determine the structures of substances. The anticancer activities of compounds were detected in A549 human lung carcinoma and L929 murine fibroblast cell lines, determining cytotoxicity, apoptosis, mitochondrial membrane integrity, and caspase-3 activation. Compounds 2b bearing 4-nitrophenyl, 2c bearing phenyl, and 2d bearing 4-cyanophenyl moieties were specified with high anticancer activity, acting through an apoptotic pathway with an apoptosis ratio of 9.61%-15.59%. Mitochondrial membrane depolarization was determined to be 25.53% and 22.33% for compounds 2b and 2c, respectively. Furthermore, compound 2c exhibited excellent caspase-3 activation. A molecular docking study was realized with compound 2c on the caspase-3 enzyme. Furthermore, the electronic characteristics of the active compounds were investigated using density functional theory (DFT) at the B3LYP/6-31G (d, p) level. The frontier molecular orbital energy and atomic net charges were examined.
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Affiliation(s)
- Demokrat Nuha
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey.,Department of Chemistry, Faculty of Science, Eskisehir Technical University, Eskişehir, Turkey.,Faculty of Pharmacy, University of Business and Technology, Prishtina, Kosovo
| | - Asaf E Evren
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey.,Department of Pharmacy Services, Vocational School of Health Services, Bilecik Seyh Edebali University, Bilecik, Turkey
| | - Zennure Ş Çiyanci
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Halide E Temel
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Gülşen Akalin Çiftçi
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Leyla Yurttaş
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
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66
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Analytical and Theoretical Studies of Antioxidant Properties of Chosen Anthocyanins; A Structure-Dependent Relationships. Int J Mol Sci 2022; 23:ijms23105432. [PMID: 35628243 PMCID: PMC9141991 DOI: 10.3390/ijms23105432] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/08/2022] [Accepted: 05/11/2022] [Indexed: 02/04/2023] Open
Abstract
The relationship between the structure and the antiradical and antioxidant activities of three anthocyanidins, namely peonidin, petunidin, and delphinidin, and their glucosides was investigated in this study. The ability of anthocyanins to scavenge free radicals was determined using DPPH● assay, whereas the inhibition of peroxidation in liposomes in relation to a model membrane that imitated the composition of a lipid membrane in tumor cells was specified using the fluorimetric method. To explore this issue at the atomistic level, density functional theory studies were applied. It was shown that glycosides performed better than anthocyanidins in protecting membranes against oxidation. The highest redox potential was demonstrated by anthocyanidins with the highest number of hydroxyl groups in the B ring in the order as follows: (Dp > Pt > Pn), and the same relationship was proven for their glucosides. The majority of the compounds studied here proved to be better antioxidants than ascorbic acid. They showed consistent electrodonating properties and though the f-HAT mechanism became more feasible with each consecutive deprotonation. Glycosylation did not have a direct impact on reactivity, apart from peonidin and petunidin in the study of which it was found that this process was responsible for lifting off steric hindrance between B and C rings and rendering certain pathways more feasible. Kinetic and molecular dynamics are essential to properly describe the membrane’s lipid oxidation.
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67
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Ngo TC, Dao DQ, Mai TVT, Nguyen TLA, Huynh LK. On The Radical Scavenging and DNA Repairing Activities by Natural Oxygenated Diterpenoids: Theoretical Insights. J Chem Inf Model 2022; 62:2365-2377. [PMID: 35522908 DOI: 10.1021/acs.jcim.1c01428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Diterpenoids are abundant and important compounds in Euphorbia species owing to their structural diversity; therefore, in this study, we investigate the modern-concept antioxidant activities, including free-radical scavenging and oxidative DNA damage repairing, of highly oxygenated diterpenoids originating from the aerial part of Euphorbia helioscopia. Four compounds with structural types of ent-abietane, containing a fused furan ring in their structures, including euphelionolide A (1), euphelionolide D (2), euphelionolide I (3), and euphelionolide L (4) are selected. First, the radical-scavenging activity of these compounds was evaluated with two typical radicals HOO• and HO• in water and pentyl ethanoate (PEA, to mimic lipid environment) via three main mechanisms, namely, hydrogen atom transfer (HAT), radical adduct formation (RAF), and single electron transfer. It is found that the studied compounds are able to scavenge free radicals at multiple reactive sites favorably via HAT and RAF mechanisms, in which the former dominates in the case with HOO• while both mechanisms are competitive in the reaction with HO•. Second, chemical repairing of DNA damage is modeled with the H-atom and single electron being transferred from the studied molecules to damaged 2'-deoxyguanosine (2dG) (i.e., 2dG• radicals and 2dG•+ radical cation). Among the four compounds, euphelionolide A is shown as the most effective radical scavenger and also the highest potential species for chemical repairing of radical-damaged DNA in both water and PEA.
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Affiliation(s)
- Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Tam V-T Mai
- Molecular Science and Nano-Materials Lab, Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City 700000, Vietnam.,University of Science, Vietnam National University─HCMC, 227 Nguyen Van Cu, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Lam K Huynh
- International University, Vietnam National University─HCMC, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
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68
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The hydroperoxyl antiradical activity of Trolox in water: The effects of pH values on rate constants. THE EUROBIOTECH JOURNAL 2022. [DOI: 10.2478/ebtj-2022-0006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Abstract
Trolox (6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid) is a highly hydrophilic α-tocopherol analog that is widely used as a standard against which the antioxidant ability of other chemicals is measured and represented in Trolox equivalents. However, the effect of pH values on the hydroxyl radical scavenging activity has not been fully studied yet. In this study, the HOO• antiradical activity of Trolox in water was studied. It was found that the H-abstraction of the O1-H bond determined the activity of the neutral and monoanion states, whereas the electron transfer reaction of the hydroxyl anion state determined the activity of the dianion state. Although the total rate constant increased following the increase in pH levels, the overall rate constant of the Trolox + HOO• reaction in water changed when pH levels rose due to the decrease in HOO• molar fraction. The results also revealed that at pH < 2, the O1-radical was the main intermediate of the Trolox + HOO• reaction in water, whereas, at pH ---gt--- 5, the anion-radical was the significant intermediate. Thus the rate constants and the reaction intermediates vary with the pH values.
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69
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Spiegel M. Current Trends in Computational Quantum Chemistry Studies on Antioxidant Radical Scavenging Activity. J Chem Inf Model 2022; 62:2639-2658. [PMID: 35436117 PMCID: PMC9198981 DOI: 10.1021/acs.jcim.2c00104] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
The antioxidative
nature of chemicals is now routinely studied
using computational quantum chemistry. Scientists are constantly proposing
new approaches to investigate those methods, and the subject is evolving
at a rapid pace. The goal of this review is to collect, consolidate,
and present current trends in a clear, methodical, and reference-rich
manner. This paper is divided into several sections, each of which
corresponds to a different stage of elaborations: preliminary concerns,
electronic structure analysis, and general reactivity (thermochemistry
and kinetics). The sections are further subdivided based on methodologies
used. Concluding remarks and future perspectives are presented based
on the remaining elements.
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Affiliation(s)
- Maciej Spiegel
- Department of Pharmacognosy and Herbal Medicines, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
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70
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Nam PC, Trung NQ, Hoa NT, Bich HN, Manh TD, Quang DT, Mechler A, Vo QV. Oxoberberine: a promising natural antioxidant in physiological environments. RSC Adv 2022; 12:9738-9743. [PMID: 35424953 PMCID: PMC8961270 DOI: 10.1039/d2ra01372j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
Oxoberberine (OB, 2,10-dihydroxy-3,9-dimethoxy-8-oxo-protoberberine, artathomsonine), which was isolated from Artabotrys thomsonii, was shown to exhibit potent antioxidant activity in vitro, however that is the only reported evidence of the radical scavenging activity of this compound thus far. In the present study, thermodynamic and kinetic calculations were used to determine the free radical scavenging activity of OB against a range of biologically important species, under physiological conditions. In the first part the activity is calculated against the HOO˙ radical that is both biologically important and a reference radical for comparison. It was found that OB has high antiradical capacity against HOO˙ in both lipid medium and water at physiological pH with k overall = 1.33 × 105 and 1.73 × 106 M-1 s-1, respectively. The formal hydrogen transfer mechanism defined the activity in nonpolar environments, whereas in the aqueous solution the single electron transfer competes with the hydrogen transfer pathway. The results showed that, in lipid medium, the HOO˙ trapping capability of OB is better than typical antioxidants such as Trolox, BHT, resveratrol and ascorbic acid. Similarly, the activity of OB in water at pH 7.4 is roughly 19 and 7 times faster than those of Trolox and BHT, respectively, but slightly lower than the activities of resveratrol or ascorbic acid. In the second part, it was found that OB also exhibits high activity against other typical free radicals such as CH3O˙, CH3OO˙, CCl3OO˙, NO2, SO4˙-, DPPH and ABTS˙+ with k f ranging from 2.03 × 105 to 5.74 × 107 M-1 s-1. Hence, it is concluded that OB is a promising radical scavenger in the physiological environment.
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Affiliation(s)
- Pham Cam Nam
- Department of Chemical Engineering, The University of Danang-University of Science and Technology Danang 550000 Vietnam
| | - Nguyen Quang Trung
- The University of Danang-University of Science and Education Da Nang 550000 Vietnam
| | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Huynh Ngoc Bich
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Tran Duc Manh
- The University of Danang-University of Science and Education Da Nang 550000 Vietnam
| | | | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University Victoria 3086 Australia
| | - Quan V Vo
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
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71
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Alov P, Tsakovska I, Pajeva I. Hybrid Classification/Regression Approach to QSAR Modeling of Stoichiometric Antiradical Capacity Assays' Endpoints. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072084. [PMID: 35408486 PMCID: PMC9000788 DOI: 10.3390/molecules27072084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 11/16/2022]
Abstract
Quantitative structure-activity relationships (QSAR) are a widely used methodology allowing not only a better understanding of the mechanisms of chemical reactions, including radical scavenging, but also to predict the relevant properties of chemical compounds without their synthesis, isolation and experimental testing. Unlike the QSAR modeling of the kinetic antioxidant assays, modeling of the assays with stoichiometric endpoints depends strongly on the number of hydroxyl groups in the antioxidant molecule, as well as on some integral molecular descriptors characterizing the proportion of OH-groups able to enter and complete the radical scavenging reaction. In this work, we tested the feasibility of a "hybrid" classification/regression approach, consisting of explicit classification of individual OH-groups as involved in radical scavenging reactions, and using further the number of these OH-groups as a descriptor in simple-regression QSAR models of antiradical capacity assays with stoichiometric endpoints. A simple threshold classification based on the sum of trolox-equivalent antiradical capacity values was used, selecting OH-groups with specific radical stability- and reactivity-related electronic parameters or their combination as "active" or "inactive". We showed that this classification/regression modeling approach provides a substantial improvement of the simple-regression QSAR models over those built on the number of total phenolic OH-groups only, and yields a statistical performance similar to that of the best reported multiple-regression QSARs for antiradical capacity assays with stoichiometric endpoints.
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Affiliation(s)
- Petko Alov
- Department of QSAR and Molecular Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
- Department of Mathematical Modeling and Numerical Analysis, Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
- Correspondence: (P.A.); (I.P.)
| | - Ivanka Tsakovska
- Department of QSAR and Molecular Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
| | - Ilza Pajeva
- Department of QSAR and Molecular Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
- Correspondence: (P.A.); (I.P.)
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72
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Le TH, Thi Tran TV, Tran VK, Vu Ho XA, Tran TM, Chau Nguyen DG, Chuong Nguyen TH, Varma RS, Trinh TK, Ho TT, Hac Nguyen TB, Ahamad T, Nguyen CC, Le QV. Structural Characterization of Mannoglucan Isolated from Ophiocordyceps sobolifera and Its Antioxidant Activities. ACS OMEGA 2022; 7:9397-9405. [PMID: 35350314 PMCID: PMC8945084 DOI: 10.1021/acsomega.1c06651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
A novel polysaccharide structure (PS-T80) was collected from Ophiocordyceps sobolifera biomass and characterized via a combination of chemical and spectral analyses. Employing high-performance gel permeation chromatography (HPGPC), the average molecular weight is proven to be 7.4 × 104 Da. Furthermore, a sugar composition analysis of the obtained polysaccharide suggests two main sugars, β-d-glucose and α-d-mannose, at a molar ratio of 2:1, respectively, in the backbone. The structure analysis unveils that PS-T80 is a mannoglucan, possessing the repeating unit of [→3)-β-d-Glcp-(1 → 3)-α-d-Manp-(1 → 3)-β-d-Glcp-(1→] n . Such a configuration could be considered a novel polysaccharide. Impressively, in vitro antioxidant tests revealed that PS-T80 has a promising antioxidant activity. These results demonstrate that the obtained PS is a potential bioactive material for biomedical applications.
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Affiliation(s)
- Trung Hieu Le
- Faculty
of Chemistry, Hue University of Sciences,
Hue University, Thua Thien
Hue 530000, Vietnam
| | - Thi Van Thi Tran
- Faculty
of Chemistry, Hue University of Sciences,
Hue University, Thua Thien
Hue 530000, Vietnam
| | - Van Khoa Tran
- Faculty
of Chemistry, Hue University of Sciences,
Hue University, Thua Thien
Hue 530000, Vietnam
| | - Xuan Anh Vu Ho
- Faculty
of Chemistry, Hue University of Sciences,
Hue University, Thua Thien
Hue 530000, Vietnam
| | - Thanh Minh Tran
- Faculty
of Chemistry, Hue University of Sciences,
Hue University, Thua Thien
Hue 530000, Vietnam
| | - Dang Giang Chau Nguyen
- Faculty
of Chemistry, Hue University of Sciences,
Hue University, Thua Thien
Hue 530000, Vietnam
| | - Thi Hong Chuong Nguyen
- Institute
of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty
of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam
| | - Rajender S. Varma
- Regional
Centre of Advanced Technologies and Materials, Palacký University in Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Tam Kiet Trinh
- Institute
of Microbiology and Biotechnologv, Hanoi
National University, Hanoi 100000, Vietnam
| | - Thanh-Tam Ho
- Institute
for Global Health Innovations, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Pharmacy, Duy Tan University, Da Nang 550000, Vietnam
| | | | - Tansir Ahamad
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Chinh Chien Nguyen
- Institute
of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty
of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam
| | - Quyet Van Le
- Department
of Materials Science and Engineering, Institute of Green Manufacturing
Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic
of Korea
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73
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Ribaudo G, Bortoli M, Witt CE, Parke B, Mena S, Oselladore E, Zagotto G, Hashemi P, Orian L. ROS-Scavenging Selenofluoxetine Derivatives Inhibit In Vivo Serotonin Reuptake. ACS OMEGA 2022; 7:8314-8322. [PMID: 35309454 PMCID: PMC8928538 DOI: 10.1021/acsomega.1c05567] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 12/31/2021] [Indexed: 06/14/2023]
Abstract
While the neurochemistry that underpins the behavioral phenotypes of depression is the subject of many studies, oxidative stress caused by the inflammation comorbid with depression has not adequately been addressed. In this study, we described novel antidepressant-antioxidant agents consisting of selenium-modified fluoxetine derivatives to simultaneously target serotonin reuptake (antidepressant action) and oxidative stress. Excitingly, we show that one of these agents (1-F) carries the ability to inhibit serotonin reuptake in vivo in mice. We therefore present a frontier dual strategy that paves the way for the future of antidepressant therapies.
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Affiliation(s)
- Giovanni Ribaudo
- Dipartimento
di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Marco Bortoli
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova Via Marzolo 1, 35131 Padova, Italy
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, c/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Colby E. Witt
- Department
of Chemistry and Biochemistry, University
of South Carolina, Columbia South Carolina 29201, United States
| | - Brenna Parke
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, U.K.
| | - Sergio Mena
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, U.K.
| | - Erika Oselladore
- Dipartimento
di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Giuseppe Zagotto
- Dipartimento
di Scienze del Farmaco, Università
degli Studi di Padova, Via Marzolo 5, 35131 Padova, Italy
| | - Parastoo Hashemi
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, U.K.
- Department
of Chemistry and Biochemistry, University
of South Carolina, Columbia South Carolina 29201, United States
| | - Laura Orian
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova Via Marzolo 1, 35131 Padova, Italy
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74
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Bellifa K, Mekelleche SM. Computational Investigation of the Antioxidant Activity of Dihydroxybenzoic Acids in Aqueous and Lipid Media. JOURNAL OF COMPUTATIONAL BIOPHYSICS AND CHEMISTRY 2022. [DOI: 10.1142/s2737416522500089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Reactive free radicals have both beneficial and destructive effects. Indeed, at physiological levels, free radicals help to preserve homeostasis by acting as signal transducers. However, excessive generation of free radicals can harm and damage membranes, proteins, and DNA, among other cell structures. Dihydroxybenzoic acids (DHBAs) have proven their antioxidant capacity against a large variety of free radicals, as well as their ability to inhibit or restrict reactive species overproduction. In this paper, a computational analysis of the antioxidant activity of a series of DHBAs in polar and nonpolar media was carried out at the DFT/M06-2X/6-[Formula: see text] level of theory. The implicit SMD solvation model was used in order to rationalize the experimental findings and to investigate the solvent effect on the mechanism and the radical scavenging ability. The obtained results put in evidence that HAT is the predominant mechanism in nonpolar media, whereas SPLET is more favored in polar environment. The BDE[Formula: see text], [Formula: see text], and [Formula: see text] descriptors are used to predict the most reactive hydroxyl groups and the antioxidant activity order of the studied DHBAs. Our results are in total agreement with experimental findings (inhibition of lipid peroxidation and scavenging of hydrogen peroxide). Moreover, this study shows that the substitution of the hydrogen atom by strong electron-donating groups, namely NMe2, in the ortho positions of the best experimental DHBAs leads to a significant enhancement of their antioxidant activity.
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Affiliation(s)
- Khadidja Bellifa
- Laboratory of Applied Thermodynamics and Molecular Modeling, Department of Chemistry, Faculty of Science, University of Tlemcen, PB 119, Tlemcen 13000, Algeria
| | - Sidi Mohamed Mekelleche
- Laboratory of Applied Thermodynamics and Molecular Modeling, Department of Chemistry, Faculty of Science, University of Tlemcen, PB 119, Tlemcen 13000, Algeria
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75
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Dwinandha D, Zhang B, Fujii M. Prediction of reaction mechanism for OH radical-mediated phenol oxidation using quantum chemical calculation. CHEMOSPHERE 2022; 291:132763. [PMID: 34740699 DOI: 10.1016/j.chemosphere.2021.132763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 06/13/2023]
Abstract
Understanding the reaction mechanism of OH•-mediated oxidation of organic micropollutants (OMPs) contributes to the assessment and development of advanced oxidation processes (AOPs) for removal of OMPs in water environment. In this study, a theoretical approach using quantum chemical calculation (QCC) was employed to investigate the prediction accuracy of the reaction mechanism (i.e., reaction site and rate) for OH•-mediated oxidation of phenol, where the hydroquinone and catechol are generated as transformation products (TPs) via radical and electrophilic reactions. We compared three different levels of theory (Hartree-Fock, B3LYP, and M06-2X) with 6-311 + G (2d,2p)/SMD, and the reaction site and rate constants were predicted by the Fukui function and transition state theory, respectively. Overall, the prediction accuracy of the TPs formation mechanism was the highest in the calculations using M06-2X. For example, the initial OH• addition to phenol was predicted to occur with a probability of 77% for the ortho position and 23% for the para position, which was consistent with the experimental observation. By applying the transition state theory, the rate constants toward TPs formation pathway can be reasonably reproduced, suggesting that M06-2X has an effective function for polycyclic reactions. However, the observed discrepancies in rate constants are inferred from dispersion effects and the multi-reference property in the computational system or derived from mismatch of target reactions between theoretical calculations and experiments. Overall, this study provides an insight into QCC application for investigating the formation mechanism of TPs in AOPs for removal of OMPs in water environment.
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Affiliation(s)
- Dhimas Dwinandha
- Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan
| | - Bei Zhang
- Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan
| | - Manabu Fujii
- Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan.
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76
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NAST: Nonadiabatic Statistical Theory Package for Predicting Kinetics of Spin-Dependent Processes. Top Curr Chem (Cham) 2022; 380:15. [PMID: 35201520 DOI: 10.1007/s41061-022-00366-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 01/15/2022] [Indexed: 10/19/2022]
Abstract
We present a nonadiabatic statistical theory (NAST) package for predicting kinetics of spin-dependent processes, such as intersystem crossings, spin-forbidden unimolecular reactions, and spin crossovers. The NAST package can calculate the probabilities and rates of transitions between the electronic states of different spin multiplicities. Both the microcanonical (energy-dependent) and canonical (temperature-dependent) rate constants can be obtained. Quantum effects, including tunneling, zero-point vibrational energy, and reaction path interference, can be accounted for. In the limit of an adiabatic unimolecular reaction proceeding on a single electronic state, NAST reduces to the traditional transition state theory. Because NAST requires molecular properties at only a few points on potential energy surfaces, it can be applied to large molecular systems, used with accurate high-level electronic structure methods, and employed to study slow nonadiabatic processes. The essential NAST input data include the nuclear Hessian at the reactant minimum, as well as the nuclear Hessians, energy gradients, and spin-orbit coupling at the minimum energy crossing point (MECP) between two states. The additional computational tools included in the NAST package can be used to extract the required input data from the output files of electronic structure packages, calculate the effective Hessian at the MECP, and fit the reaction coordinate for more advanced NAST calculations. We describe the theory, its implementation, and three examples of application to different molecular systems.
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77
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Boulebd H, Zine Y, Khodja IA, Mermer A, Demir A, Debache A. Synthesis and radical scavenging activity of new phenolic hydrazone/hydrazide derivatives: Experimental and theoretical studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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78
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Carreon-Gonzalez M, Muñoz-Rugeles L, Vivier-Bunge A, Alvarez-Idaboy JR. Chemical repair of damaged leucine and tryptophane by thiophenols at close to diffusion-controlled rates: Mechanisms and kinetics. J Comput Chem 2022; 43:556-567. [PMID: 35106786 DOI: 10.1002/jcc.26813] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 01/15/2022] [Indexed: 12/14/2022]
Abstract
Thiophenols are chemical species with multiple desirable biological properties, including their primary and secondary antioxidant capacity. In this work, the repairing antioxidant activity of eight different thiophenols has been investigated for damaged leucine and tryptophane. The investigation was carried out employing quantum mechanical and transition state methods to calculate the thermodynamic and kinetic data of the reactions involved, while simulating the biological conditions at physiological pH and aqueous and lipidic medium. The analysis of the atomic charges and the spin densities at each of the points on the potential energy surface was the tool that allowed the elucidation of the reaction mechanisms through which thiophenols repair the oxidative damage caused to the amino acids leucine and tryptophan. It was found that thiophenols can repair leucine via a hydrogen atom transfer mechanism in a manner which is similar to the one used by glutathione to repair the carbon-centered radicals of guanosine. In addition, thiophenols can also restore tryptophane, a nitrogen-centered radical, via proton-coupled electron transfer and single electron transfer mechanisms. Moreover, both processes occur at close to diffusion-controlled rates.
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Affiliation(s)
- Mirzam Carreon-Gonzalez
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Leonardo Muñoz-Rugeles
- Laboratorio de Espectroscopia Atómica y Molecular (LEAM), Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Annik Vivier-Bunge
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City, Mexico
| | - Juan Raul Alvarez-Idaboy
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, Mexico City, Mexico
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79
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On the Scavenging Ability of Scutellarein against the OOH Radical in Water and Lipid-like Environments: A Theoretical Study. Antioxidants (Basel) 2022; 11:antiox11020224. [PMID: 35204107 PMCID: PMC8868326 DOI: 10.3390/antiox11020224] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/20/2022] [Accepted: 01/20/2022] [Indexed: 11/16/2022] Open
Abstract
The antioxidant capability of scutellarein, a flavonoid extracted from different plants of the Scutellaria family, was computationally predicted by considering its reaction with the OOH radical in both lipid-like and water environments. The pKa and equilibrium behavior in the aqueous phase were also calculated. Different reaction mechanisms involving the most populated species were considered. The work was performed by using the density functional level of theory. The individual, total, and fraction-corrected total rate constants were obtained. The results show that scutellarein has scavenging power against the hydroperoxyl radical similar to that of Trolox, which is generally used as a reference antioxidant.
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80
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Ngoc TD, Le TN, Nguyen TVA, Mechler A, Hoa NT, Nam NL, Vo QV. Mechanistic and Kinetic Studies of the Radical Scavenging Activity of 5- O-Methylnorbergenin: Theoretical and Experimental Insights. J Phys Chem B 2022; 126:702-707. [PMID: 35029995 DOI: 10.1021/acs.jpcb.1c09196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
5-O-Methylnorbergenin (5-OMB), a natural compound isolated from Rourea harmandiana, is a compound with potential antioxidant activity based on its chemical structure; however, this activity has not been investigated thus far. In this study, the antioxidant activity of 5-OMB was evaluated by experimental and computational methods. 5-OMB exhibited high activity in DPPH (IC50 = 7.25 ± 0.94 μM) and ABTS•+ (IC50 = 4.23 ± 0.12 μM) assays, higher than the reference compound Trolox. The computational results consistently show that 5-OMB is an excellent HOO• radical scavenger (koverall = 8.14 × 108 M-1 s-1) in water at physiological pH, however it only exerts weak activity in lipid medium (koverall = 3.02 × 102 M-1 s-1). The reaction follows the formal hydrogen transfer mechanism in nonpolar solvents, whereas both the sequential proton loss electron transfer and the formal hydrogen transfer pathways contribute to the activity in aqueous solution. There is a good agreement between experimental and computational data, suggesting that 5-OMB is a promising natural radical scavenger in aqueous physiological environment.
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Affiliation(s)
- Thuc Dinh Ngoc
- Department of Science and Technology Management, Hong Duc University, Thanh Hoa 40000, Vietnam
| | - Thanh Nguyen Le
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi 100000, Vietnam.,Graduate University of Science and Technology (GUST), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi 100000, Vietnam
| | - Thi Van Anh Nguyen
- University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi 100000, Vietnam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, La Trobe, Victoria 3086, Australia
| | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education, Danang 550000, Vietnam
| | - Nguyen Linh Nam
- The University of Danang - University of Technology and Education, Danang 550000, Vietnam
| | - Quan V Vo
- The University of Danang - University of Technology and Education, Danang 550000, Vietnam
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81
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82
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Truong DH, Ngo TC, Nhung NTA, Quang DT, Nguyen TLA, Khiri D, Taamalli S, Louis F, El Bakali A, Dao DQ. New insights into the competition between antioxidant activities and pro-oxidant risks of rosmarinic acid. RSC Adv 2022; 12:1499-1514. [PMID: 35425185 PMCID: PMC8978883 DOI: 10.1039/d1ra07599c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/11/2021] [Indexed: 12/18/2022] Open
Abstract
Direct and indirect antioxidant activities of rosmarinic acid (RA) based on HOO˙/CH3OO˙ radical scavenging and Fe(iii)/Fe(ii) ion chelation were theoretically studied using density functional theory at the M05-2X/6-311++G(2df,2p) level of theory. First, four antioxidant mechanisms including hydrogen atom transfer (HAT), radical adduct formation (RAF), proton loss (PL) and single electron transfer (SET) were investigated in water and pentyl ethanoate (PEA) phases. Regarding the free radical scavenging mechanism, HAT plays a decisive role with overall rate coefficients of 1.84 × 103 M−1 s−1 (HOO˙) and 4.49 × 103 M−1 s−1 (CH3OO˙) in water. In contrast to PL, RAF and especially SET processes, the HAT reaction in PEA is slightly more favorable than that in water. Second, the [Fe(iii)(H2O)6]3+ and [Fe(ii)(H2O)6]2+ ion chelating processes in an aqueous phase are both favorable and spontaneous especially at the O5, site-1, and site-2 positions with large negative ΔrG0 values and great formation constant Kf. Finally, the pro-oxidant risk of RA− was also considered via the Fe(iii)-to-Fe(ii) complex reduction process, which may initiate Fenton-like reactions forming reactive HO˙ radicals. As a result, RA− does not enhance the reduction process when ascorbate anions are present as reducing agents, whereas the pro-oxidant risk becomes remarkable when superoxide anions are found. The results encourage further attempts to verify the speculation using more powerful research implementations of the antioxidant activities of rosmarinic acid in relationship with its possible pro-oxidant risks. Direct and indirect antioxidant activities of rosmarinic acid (RA) based on HOO˙/CH3OO˙ radical scavenging and Fe(iii)/Fe(ii) ion chelation were theoretically studied using density functional theory at the M05-2X/6-311++G(2df,2p) level of theory.![]()
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Nguyen Thi Ai Nhung
- Department of Chemistry, University of Sciences, Hue University Hue 530000 Vietnam
| | - Duong Tuan Quang
- Department of Chemistry, University of Sciences, Hue University Hue 530000 Vietnam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Dorra Khiri
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | - Sonia Taamalli
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | - Florent Louis
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | | | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
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83
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Hoa NT, Van Bay M, Mechler A, Vo QV. Theoretical insights into the antiradical activity and copper-catalysed oxidative damage of mexidol in the physiological environment. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211239. [PMID: 35223048 PMCID: PMC8753141 DOI: 10.1098/rsos.211239] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 12/03/2021] [Indexed: 05/16/2023]
Abstract
Mexidol (MD, 2-ethyl-6-methyl-3-hydroxypyridine) is a registered therapeutic agent for the treatment of anxiety disorders. The chemical structure suggests that MD may also act as an antioxidant. In this study, the hydroperoxyl radical scavenging activity of MD was studied to establish baseline antioxidant activity, followed by an investigation of the effect of MD on the copper-catalysed oxidative damage in biological systems, using computational methods. It was found that MD exhibits moderate radical scavenging activity against HOO• in water and pentyl ethanoate solvents following the single electron transfer and formal hydrogen transfer mechanisms, respectively. MD can chelate Cu(II), forming complexes that are much harder to reduce than free Cu(II): MD chelation completely quenches the Cu(II) reduction by ascorbic acid and suppresses the rate of reduction reaction byO 2 ⋅ - that are the main reductants of Cu(II) in biological environments. Therefore, MD exerts its anti-HO• activity primarily as an OIL-1 inhibitor.
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Affiliation(s)
- Nguyen Thi Hoa
- The University of Danang, University of Technology and Education, Danang 550000, Vietnam
| | - Mai Van Bay
- Department of Chemistry, The University of Danang, University of Science and Education, Danang 550000, Vietnam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, Victoria 3086, Australia
| | - Quan V. Vo
- The University of Danang, University of Technology and Education, Danang 550000, Vietnam
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84
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Boulebd H, Pereira DM, Amine Khodja I, Hoa NT, Mechler A, Vo QV. Assessment of the free radical scavenging potential of cannabidiol under physiological conditions: Theoretical and experimental investigations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118277] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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85
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Couttolenc A, Medina ME, Trigos Á, Espinoza C. Antioxidant capacity of fungi associated with corals and sponges of the reef system of Veracruz, Mexico. ELECTRON J BIOTECHN 2022. [DOI: 10.1016/j.ejbt.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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86
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Hoa NT, Ngoc Van LT, Vo QV. The hydroperoxyl antiradical activity of natural hydroxycinnamic acid derivatives in physiological environments: the effects of pH values on rate constants. RSC Adv 2022; 12:15115-15122. [PMID: 35702430 PMCID: PMC9115882 DOI: 10.1039/d2ra02311c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/11/2022] [Indexed: 11/21/2022] Open
Abstract
Quantum chemistry calculations suggest that hydroxycinnamic acid derivatives are good natural antioxidants in aqueous solutions.
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Affiliation(s)
- Nguyen Thi Hoa
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
| | | | - Quan V. Vo
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
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87
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Boulebd H, Mechler A, Thi Hoa N, Vo QV. Insights on the kinetics and mechanisms of the peroxyl radical scavenging capacity of caftaric acid: the important role of the acid–base equilibrium. NEW J CHEM 2022. [DOI: 10.1039/d2nj00377e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Considering the acid–base equilibrium, caftaric acid has been shown to be one of the best antioxidants among phenolic acids in the aqueous physiological environment.
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Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Fréres Mentouri Constantine 1, Constantine, Algeria
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, Victoria 3086, Australia
| | - Nguyen Thi Hoa
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
| | - Quan V. Vo
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
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88
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Hieu LT, Van Bay M, Hoa NT, Mechler A, Vo QV. The radical scavenging activity of glycozolidol in physiological environments: a quantum chemical study. RSC Adv 2022; 12:32693-32699. [DOI: 10.1039/d2ra05907j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/08/2022] [Indexed: 11/19/2022] Open
Abstract
Glycozolidol (GLD), derived from Glycosmis pentaphylla, is predicted to be a good radical scavenger in physiological environments.
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Affiliation(s)
- Le Trung Hieu
- University of Sciences, Hue University, Thua Thien Hue 530000, Vietnam
| | - Mai Van Bay
- The University of Danang, University of Science and Education, Danang 550000, Vietnam
| | - Nguyen Thi Hoa
- The University of Danang, University of Technology and Education, Danang 550000, Vietnam
| | - Adam Mechler
- Department of Biochemistry and Chemistry, La Trobe University, Victoria 3086, Australia
| | - Quan V. Vo
- The University of Danang, University of Technology and Education, Danang 550000, Vietnam
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89
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Nguyen NT, Dai VV, Mechler A, Hoa NT, Vo QV. Synthesis and evaluation of the antioxidant activity of 3-pyrroline-2-ones: experimental and theoretical insights. RSC Adv 2022; 12:24579-24588. [PMID: 36128396 PMCID: PMC9425838 DOI: 10.1039/d2ra04640g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 08/22/2022] [Indexed: 11/29/2022] Open
Abstract
The heterocyclic γ-lactam ring 2-pyrrolidinone has four carbon atoms and one nitrogen atom. Among the group of derivatives of 2-pyrrolidinones, 1,5-dihydro-2H-pyrrol-2-ones, also known as 3-pyrroline-2-ones, play a significant structural role in a variety of bioactive natural compounds. In this study, three-component reactions were used to successfully synthesize six polysubstituted 3-hydroxy-3-pyrroline-2-one derivatives. The antioxidant activity of the compounds was tested by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, identifying 4-ethoxycarbonyl-3-hydroxy-5-(4-methylphenyl)-1-phenyl-3-pyrroline-2-one (4b) as the most promising radical scavenger. Quantum chemistry calculations of the thermodynamics and kinetics of the radical scavenging activity also suggest that 4b is an effective HO˙ radical scavenger, with koverall values of 2.05 × 109 and 1.54 × 1010 M−1 s−1 in pentyl ethanoate and water, respectively. On the other hand, 4b could not scavenge hydroperoxyl radicals in either media. The ability of 4b to scavenge hydroxyl radicals in polar and non-polar environments is comparable to that of conventional antioxidants such as melatonin, gallic acid, indole-3-carbinol, ramalin, or Trolox. Thus 4b may be classed as a promising HO˙ radical scavenger in the physiological environment. Derivatives of 3-hydroxy-3-pyrroline-2-one were effectively synthesized via multicomponent reactions and exhibited potential HO˙ radical scavenging activity.![]()
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Affiliation(s)
- Nguyen Tran Nguyen
- The University of Danang – University of Science and Education, Danang 550000, Vietnam
| | - Vo Viet Dai
- The University of Danang – University of Science and Education, Danang 550000, Vietnam
| | - Adam Mechler
- Department of Biochemistry and Chemistry, La Trobe University, Victoria 3086, Australia
| | - Nguyen Thi Hoa
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
| | - Quan V. Vo
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
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90
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Boulebd H. Is cannabidiolic acid an overlooked natural antioxidant? Insights from quantum chemistry calculations. NEW J CHEM 2022. [DOI: 10.1039/d1nj04771j] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The radical scavenging capacity of CBDA is moderate in lipid media but it is very important in water via the SET mechanism.
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Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria
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91
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Antioxidants into Nopal ( Opuntia ficus-indica), Important Inhibitors of Free Radicals' Formation. Antioxidants (Basel) 2021; 10:antiox10122006. [PMID: 34943109 PMCID: PMC8698577 DOI: 10.3390/antiox10122006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022] Open
Abstract
Nopal (Opuntia ficus indica) belonging to the Cactacea family has many nutritional benefits attributed to a wide variety of phenolic and flavonoid compounds. Coumaric acid (COA), ferulic acid (FLA), protocatechuic acid (PRA), and gallic acid (GAA) are the phenolic acids (PhAs) present in nopal. In this study, the role of these PhAs in copper-induced oxidative stress was investigated using the density functional theory (DFT). The PhAs form 5 thermodynamically favorable complexes with Cu(II), their conditional Gibbs free energies of reaction (ΔG’, at pH = 7.4, in kcal/mol) are from −23 kcal/mol to −18 kcal/mol. All of them are bi-dentate complexes. The complexes of PRA and GAA are capable of inhibiting the Cu(II) reduction by both O2•− and Asc−, their reactions with the chelated metal are endergonic having rate constants about ~10−5–102 M−1 s−1, PhAs can prevent the formation of hydroxyl free radicals by chelating the copper ions. Once the hydroxyl radicals are formed by Fenton reactions, the complexes of PhAs with Cu(II) can immediately react with them, thus inhibiting the damage that they can cause to molecules of biological interest. The reactions between PhAs-Cu(II) complexes and hydroxyl free radical were estimated to be diffusion-limited (~108 M−1s−1). Thus, these chelates can reduce the harmful effects caused by the most reactive free radical existent immediately after it is formed by Fenton reactions.
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92
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Milanović Ž, Dimić D, Žižić M, Milenković D, Marković Z, Avdović E. Mechanism of Antiradical Activity of Newly Synthesized 4,7-Dihydroxycoumarin Derivatives-Experimental and Kinetic DFT Study. Int J Mol Sci 2021; 22:13273. [PMID: 34948070 PMCID: PMC8709309 DOI: 10.3390/ijms222413273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/17/2021] [Accepted: 11/22/2021] [Indexed: 11/17/2022] Open
Abstract
Coumarin derivatives have proven beneficial biological activities, but the mechanism of their radical scavenging potency is not fully understood. In this study, the antiradical capacity of two newly synthesized 4,7-dihydroxycoumarin derivatives: (E)-3-(1-((3-hydroxy-4-methoxyphenyl)amino)-ethylidene)-2,4-dioxochroman-7-yl acetate (A-3OH) and (E)-3-(1-((4-hydroxy-3-methoxyphenyl)amino)ethylidene)-2,4-dioxochroman-7-yl acetate (A-4OH) towards HO• were examined by Electron Paramagnetic Resonance (EPR) Spectroscopy and Density Functional Theory (DFT). The compounds were fully characterized by the elemental microanalysis, IR, and NMR spectroscopies. The effect of pH on the acid-base equilibria is separately discussed and the predominant species at the physiological pH were determined. Several common mechanisms (Hydrogen Atom Transfer (HAT), Single-Electron Transfer followed by Proton Transfer (SET-PT), Sequential Proton Loss followed by Electron Transfer (SPLET), Radical Adduct Formation (RAF), and Intramolecular Hydrogen Atom Abstraction (iHAA)) of radical scavenging were investigated based on thermodynamic and kinetic parameters. EPR results indicated that both compounds significantly reduce the amount of present HO•. The results of the kinetic DFT study demonstrated that both compounds predominantly exhibit antiradical capacity through HAT and SPLET mechanisms. The estimated overall rate constants (koverall) proved that A-4OH shows better antioxidant capacity than A-3OH which is well-correlated with the results obtained by EPR measurement.
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Affiliation(s)
- Žiko Milanović
- Department of Science, Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia; (Ž.M.); (D.M.)
- Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Dušan Dimić
- Faculty of Physical Chemistry, University of Belgrade, 12-16 Studentski trg, 11000 Belgrade, Serbia;
| | - Milan Žižić
- Life Sciences Department, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia;
| | - Dejan Milenković
- Department of Science, Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia; (Ž.M.); (D.M.)
| | - Zoran Marković
- Department of Science, Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia; (Ž.M.); (D.M.)
| | - Edina Avdović
- Department of Science, Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia; (Ž.M.); (D.M.)
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93
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The radical scavenging activity of monosubstituted iminostilbenes: Theoretical insights. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.139105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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94
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Boulebd H. Modeling the peroxyl radical scavenging behavior of Carnosic acid: Mechanism, kinetics, and effects of physiological environments. PHYTOCHEMISTRY 2021; 192:112950. [PMID: 34530282 DOI: 10.1016/j.phytochem.2021.112950] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 06/13/2023]
Abstract
Carnosic acid (CA), a phenolic diterpene and abietane-type compound, is a potent natural antioxidant with medical benefits. The present paper elucidates, for the first time, the kinetics and the exact mechanism of the peroxyl radical scavenging activity of CA in the gas phase and under physiological conditions. According to the obtained results, the reaction of CA with HOO• is significantly faster in aqueous solution than in the gas phase and nonpolar environments. The abstraction of the hydrogen atom from 2-OH is the decisive mechanism in the gas phase and nonpolar media, while both hydrogen abstraction (15%) and electron transfer (85%) mechanisms can take place in aqueous solution. The overall rate coefficient in water (4.73 × 106 M-1 s-1) is about 36 times higher than that of the reference antioxidant Trolox (1.30 × 105 M-1 s-1), suggesting that CA is a potent scavenger of peroxyl radicals in polar media.
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Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria.
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95
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Vo QV, Hoa NT, Thong NM, Mechler A. The hydroperoxyl and superoxide anion radical scavenging activity of anthocyanidins in physiological environments: Theoretical insights into mechanisms and kinetics. PHYTOCHEMISTRY 2021; 192:112968. [PMID: 34598044 DOI: 10.1016/j.phytochem.2021.112968] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/09/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
The HOO• and O2•- scavenging activities of 12 natural anthocyanidins were investigated in physiological environments by using DFT calculations. The results suggest high HOO• scavenging activity in aqueous medium with overall rate constants in the range of koverall = 1.58 × 108 - 7.59 × 109 M-1 s-1, whereas in lipid medium only weak activity is predicted. O2•- scavenging is also fast in water with kapp = ∼109 M-1 s-1. Like in the case of many other antioxidants that contain acidic moieties, the anion states (H3A- and H2A2-) and the single electron transfer mechanism play a dominant role in the HOO• scavenging activity of anthocyanidins in water at pH = 7.4. Analysis of the mechanism suggests that the O2•- and HOO• radical scavenging can occur as a regeneration cycle that might increase the protective efficiency of anthocyanidins against oxidative stress.
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Affiliation(s)
- Quan V Vo
- The University of Danang-University of Technology and Education, Danang, 550000, Viet Nam.
| | - Nguyen Thi Hoa
- The University of Danang-University of Technology and Education, Danang, 550000, Viet Nam
| | - Nguyen Minh Thong
- The University of Danang, Campus in Kon Tum, 704 Phan Dinh Phung, Kon Tum, Viet Nam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University, Victoria, 3086, Australia
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96
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Dinh Ngoc T, Ha MVT, Nguyen Le T, Nguyen TVA, Mechler A, Hoa NT, Vo QV. Antioxidant Activity of Natural Samwirin A: Theoretical and Experimental Insights. ACS OMEGA 2021; 6:27546-27551. [PMID: 34693175 PMCID: PMC8529648 DOI: 10.1021/acsomega.1c04569] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 09/23/2021] [Indexed: 05/14/2023]
Abstract
Samwirin A (SW), a natural compound isolated from Sambucus williamsii or Rourea harmandiana, is known to exhibit potent antiosteoporosis activity and promote cell proliferation in rat osteoblast-like UMR 106 cells. Antiosteoporosis activity suggests that the compound must also exhibit antioxidant activity but this has not been studied thus far. In the present study, the antioxidant activity of SW was examined by experimental and computational studies. It was found that SW exhibits good hydroperoxyl scavenging activity, particularly in water at physiological pH (k overall = 1.01 × 107 M-1 s-1). The single-electron transfer mechanism defines the HOO• + SW reaction in water, while the activity in the lipid medium is moderate and it follows the formal hydrogen transfer mechanism. The rate constant of the HOO• scavenging reaction in the aqueous solution is about 78 times higher than the reference compound Trolox. The computational results are in line with experimental data underscoring that SW is a promising radical scavenger in aqueous media at physiological pH.
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Affiliation(s)
- Thuc Dinh Ngoc
- Department
of Science and Technology Management, Hong
Duc University, Thanh Hoa40000, Vietnam
| | - Mai Vu Thi Ha
- Department
of Science and Technology Management, Hong
Duc University, Thanh Hoa40000, Vietnam
| | - Thanh Nguyen Le
- Institute
of Marine Biochemistry (IMBC) and Graduate University of Science and
Technology (GUST), Vietnam Academy of Science
and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi 100000, Vietnam
| | - Thi Van Anh Nguyen
- University
of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi 100000, Vietnam
| | - Adam Mechler
- Department
of Chemistry and Physics, La Trobe University, Victoria 3086, Australia
| | - Nguyen Thi Hoa
- The
University of Danang—University of Technology and Education, Danang 550000, Vietnam
| | - Quan V. Vo
- The
University of Danang—University of Technology and Education, Danang 550000, Vietnam
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98
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Boulebd H. Radical scavenging behavior of butylated hydroxytoluene against oxygenated free radicals in physiological environments: Insights from DFT calculations. INT J CHEM KINET 2021. [DOI: 10.1002/kin.21540] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest University of Frères Mentouri Constantine 1 Constantine Algeria
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99
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Dalla Tiezza M, Hamlin TA, Bickelhaupt FM, Orian L. Radical Scavenging Potential of the Phenothiazine Scaffold: A Computational Analysis. ChemMedChem 2021; 16:3763-3771. [PMID: 34536069 PMCID: PMC9292796 DOI: 10.1002/cmdc.202100546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/05/2021] [Indexed: 01/05/2023]
Abstract
The reactivity of phenothiazine (PS), phenoselenazine (PSE), and phenotellurazine (PTE) with different reactive oxygen species (ROS) has been studied using density functional theory (DFT) in combination with the QM‐ORSA (Quantum Mechanics‐based Test for Overall Free Radical Scavenging Activity) protocol for an accurate kinetic rate calculation. Four radical scavenging mechanisms have been screened, namely hydrogen atom transfer (HAT), radical adduct formation (RAF), single electron transfer (SET), and the direct oxidation of the chalcogen atom. The chosen ROS are HO., HOO., and CH3OO.. PS, PSE, and PTE exhibit an excellent antioxidant activity in water regardless of the ROS due to their characteristic diffusion‐controlled regime processes. For the HO. radical, the primary active reaction mechanism is, for all antioxidants, RAF. But, for HOO. and CH3OO., the dominant mechanism strongly depends on the antioxidant: HAT for PS and PSE, and SET for PTE. The scavenging efficiency decreases dramatically in lipid environment and remains only significant (via RAF) for the most reactive radical (HO.). Therefore, PS, PSE, and PTE are excellent antioxidant molecules, especially in aqueous, physiological environments where they are active against a broad spectrum of harmful radicals. There is no advantage or significant difference in the scavenging efficiency when changing the chalcogen since the reactivity mainly derives from the amino hydrogen and the aromatic sites.
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Affiliation(s)
- Marco Dalla Tiezza
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Trevor A Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands.,Institute for Molecules and Materials (IMM), Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
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100
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Boulebd H, Amine Khodja I. A detailed DFT-based study of the free radical scavenging activity and mechanism of daphnetin in physiological environments. PHYTOCHEMISTRY 2021; 189:112831. [PMID: 34146991 DOI: 10.1016/j.phytochem.2021.112831] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 06/05/2021] [Accepted: 06/06/2021] [Indexed: 05/08/2023]
Abstract
Daphnetin, a biologically active coumarin derivative found in plants of the genus Daphne, is a potent antioxidant phenolic compound. The present work describes the mechanisms and kinetics of the HO, NO, HOO, and NO2 scavenging activities of daphnetin in physiological environments using quantum chemistry calculations. The main antiradical mechanisms have been studied: formal hydrogen transfer (FHT), sequential electron transfer proton transfer (SETPT), sequential proton loss electron transfer (SPLET), and radical adduct formation (RAF). Besides its good HO scavenging activity in physiological environments, daphnetin is expected to exhibit good HOO and NO2 scavenging activities in water with koverall = 1.51 × 107 and 4.79 × 108 M-1s-1, respectively. The FHT mechanism decides the HO scavenging activity in aqueous solution, as well as HO, HOO, and NO2 scavenging activities in lipid media, while SPLET is the primary mechanism in water for HOO and NO2 scavenging activities. The theoretical predictions were found to be in good agreement with the available experimental data, which supports the reliability of the calculations.
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Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria.
| | - Imene Amine Khodja
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria
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