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Bakheit AH, Wani TA, Al-Majed AA, Alkahtani HM, Alanazi MM, Alqahtani FR, Zargar S. Theoretical study of the antioxidant mechanism and structure-activity relationships of 1,3,4-oxadiazol-2-ylthieno[2,3-d]pyrimidin-4-amine derivatives: a computational approach. Front Chem 2024; 12:1443718. [PMID: 39139921 PMCID: PMC11319267 DOI: 10.3389/fchem.2024.1443718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 07/11/2024] [Indexed: 08/15/2024] Open
Abstract
A theoretical thermodynamic study was conducted to investigate the antioxidant activity and mechanism of 1,3,4-oxadiazol-2-ylthieno[2,3-d]pyrimidin-4-amine derivatives (OTP) using a Density Functional Theory (DFT) approach. The study assessed how solvent environments influence the antioxidant properties of these derivatives. With the increasing prevalence of diseases linked to oxidative stress, such as cancer and cardiovascular diseases, antioxidants are crucial in mitigating the damage caused by free radicals. Previous research has demonstrated the remarkable scavenging abilities of 1,3,4-oxadiazole derivatives, prompting this investigation into their potential using computational methods. DFT calculations were employed to analyze key parameters, including bond dissociation enthalpy (BDE), ionization potential (IP), proton dissociation enthalpy (PDE), and electron transfer enthalpy (ETE), to delineate the antioxidant mechanisms of these compounds. Our findings indicate that specific electron-donating groups such as amine on the phenyl rings significantly enhance the antioxidant activities of these derivatives. The study also integrates global and local reactivity descriptors, such as Fukui functions and HOMO-LUMO energies, to predict the stability and reactivity of these molecules, providing insights into their potential as effective synthetic antioxidants in pharmaceutical applications.
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Affiliation(s)
- Ahmed H. Bakheit
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Tanveer A. Wani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman A. Al-Majed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Hamad M. Alkahtani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Manal M. Alanazi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fahad Rubayyi Alqahtani
- Department of Biomedical Technology, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Seema Zargar
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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2
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Nguyen TQ, Mechler A, Vo QV. Computational assessment of the radical scavenging activity of cleomiscosin. RSC Adv 2024; 14:23629-23637. [PMID: 39077313 PMCID: PMC11284531 DOI: 10.1039/d4ra03260h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Accepted: 07/22/2024] [Indexed: 07/31/2024] Open
Abstract
Coumarinolignans such as cleomiscosin A (CMA), cleomiscosin B (CMB), and cleomiscosin C (CMC) are secondary metabolites that were isolated from diverse plant species. Cleomiscosins (CMs) have numerous interesting biological activities, including noteworthy cytotoxicity of cancer cell lines along with hepatoprotective and assumed antioxidant activities. In this present study, the antioxidant properties of three cleomiscosins were investigated with a focus on the structure-activity relationship using thermodynamic and kinetic calculations with the M06-2X/6-311++G(d,p) method. The results show that CMs, including CMA, CMB, and CMC, are weak antioxidants in apolar environments, with k overall of 7.52 × 102 to 6.28 × 104 M-1 s-1 for the HOO˙ radical scavenging reaction in the gas phase and 3.47 × 102 to 6.44 × 104 M-1 s-1 in pentyl ethanoate. Remarkably, the difference in the fusion of phenylpropanoid structure with coumarin via two ortho-hydroxyl groups (CMA and CMB) does not cause any noticeable effect on their antioxidant activity, while the presence of a methoxy substitute on the aromatic ring of phenylpropanoid units (CMC) increases the reaction rate to about 61 to 84 times faster than that of CMA. In contrast, the studied CMs exhibit a good antioxidant capacity in polar environments, with a k overall range from 4.03 × 107 to 8.66 × 107 M-1 s-1, 102-103 times faster than that of Trolox, equal to that of ascorbic acid and resveratrol. The angular fusion of the phenylpropanoid and coumarin structures, as well as the methoxy substitution on the aromatic ring of the phenylpropanoid unit of the studied CMs, do not have any considerable effect on their antioxidant activity under the studied conditions.
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Affiliation(s)
- Trung Quang Nguyen
- The University of Danang - University of Science and Education Da Nang 550000 Vietnam
- Quality Assurance and Testing Center 2 Da Nang 550000 Vietnam
| | - Adam Mechler
- Department of Biochemistry and Chemistry, La Trobe University Victoria 3086 Australia
| | - Quan V Vo
- Faculty of Chemical Technology - Environment, The University of Danang - University of Technology and Education Da Nang 550000 Vietnam
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3
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Spiegel M. Unveiling the Antioxidative Potential of Galangin: Complete and Detailed Mechanistic Insights through Density Functional Theory Studies. J Org Chem 2024; 89:8676-8690. [PMID: 38861646 PMCID: PMC11197094 DOI: 10.1021/acs.joc.4c00611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 05/13/2024] [Accepted: 05/21/2024] [Indexed: 06/13/2024]
Abstract
A comprehensive quantum mechanical investigation delved into the antioxidative activity of galangin (Glg). Thermochemical and kinetic data were used to assess antiradical, chelating, and renewal potential under physiological conditions. A brief comparison with reference antioxidants and other flavonoids characterized Glg as a moderate antioxidative agent. The substance showed significantly lower performance in lipid compared to aqueous solvent─the reaction rates for scavenging •OOH in both media were established at 3.77 × 103 M-1 s-1 and 6.21 × 104 M-1 s-1, respectively, accounting for the molar fraction of both interacting molecules at the given pH. The impact of pH value on the kinetics was assessed. Although efficient at chelating Cu(II) ions, the formed complexes can still undergo the Fenton reaction. On the other hand, they persistently scavenge •OH in statu nascendi. The flavonoid effectively repairs oxidatively damaged biomolecules except model lipid acids. All Glg radicals are readily restored by physiologically prevailing O2•-. Given this, the polyphenol is expected to participate in antiradical and regenerating activities multiple times, amplifying its antioxidative potential.
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Affiliation(s)
- Maciej Spiegel
- Department of Organic Chemistry and
Pharmaceutical Technology, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
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4
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Quy Huong D, Nam PC, Quang DT, Ngo ST, Duong T, Tam NM. Evaluation of Free Radical Scavenging Ability of Triazole-3-Thiol: A Combination of Experimental and Theoretical Approaches. ACS OMEGA 2024; 9:24071-24081. [PMID: 38854538 PMCID: PMC11154933 DOI: 10.1021/acsomega.4c02931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/08/2024] [Accepted: 05/13/2024] [Indexed: 06/11/2024]
Abstract
An assessment of the free radical scavenging potential of 4-amino-5-phenyl-4H-1,2,4-triazole-3-thiol (AT) and 4-amino-5-(4-pyridyl)-4H-1,2,4-triazole-3-thiol (AP) involved a combination of experimental methodologies and theoretical calculations. In the 2,2-diphenyl-1-picrylhydrazyl (DPPH•) assay, AT exhibited an heightened efficacy in scavenging DPPH• radicals compared to AP. This was evidenced by the notably lower IC50DPPH value observed for AT (1.3 × 10-3 ± 0.2 × 10-3 M) in comparison to AP (2.2 × 10-3 ± 0.1 × 10-3 M). Similarly, in the 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) (ABTS• +) test, AT exhibited superior ability in neutralizing ABTS•+ free radical cations compared to AP, with the computed IC50ABTS values of 4.7 × 10-5 ± 0.1 × 10-5 M for AT and 5.5 × 10-5 ± 0.2 × 10-5 M for AP. Density functional theory served as the tool for evaluating the correlation between structural attributes and the antioxidant efficacy of the studied molecules. The findings highlighted the flexibility of hydrogen atoms within NH and NH2 groups to nucleophilic attacks, indicative of their pivotal role in the scavenging mechanism. Furthermore, investigations into the interactions between AT and AP with the free radical HOO• revealed predominantly the reaction via the hydrogen atom transfer mechanism. Both experimental observations and theoretical deductions collectively affirmed AT's superior free radical scavenging ability over AP in the gas phase and ethanol.
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Affiliation(s)
- Dinh Quy Huong
- Department
of Chemistry, University of Education, Hue
University, Hue 530000, Vietnam
| | - Pham Cam Nam
- Department
of Chemical Engineering, The University
of Danang − University of Science and Technology, Danang 550000, Vietnam
| | - Duong Tuan Quang
- Department
of Chemistry, University of Education, Hue
University, Hue 530000, Vietnam
| | - Son Tung Ngo
- Laboratory
of Biophysics, Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City 72195, Vietnam
- Faculty
of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 72195, Vietnam
| | - Tran Duong
- Department
of Chemistry, University of Education, Hue
University, Hue 530000, Vietnam
| | - Nguyen Minh Tam
- Faculty
of Basic Sciences, University of Phan Thiet, 225 Nguyen Thong, Phan Thiet City 77000, Viet Nam
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5
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Wen F, Liu Y, Yang H, Yan X, Zhang Y, Zhong Z. Preparation, characterization, antioxidant, and antifungal activity of phenyl/indolyl-acyl chitooligosaccharides. Carbohydr Res 2024; 538:109077. [PMID: 38479043 DOI: 10.1016/j.carres.2024.109077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 03/04/2024] [Accepted: 03/06/2024] [Indexed: 04/13/2024]
Abstract
In this study, carboxylic acids compounds were grafted onto chitooligosaccharides to prepare seven phenyl/indolyl-acyl chitooligosaccharides derivatives. The structures of the derivatives were characterized by IR spectroscopy, 13C NMR and elemental analysis. Meanwhile, antioxidant activities in vitro of the novel derivatives were analyzed. Compared to COS and carboxylic acid, the derivatives showed higher scavenging capacity for superoxide anion and DPPH radicals, with scavenging rates of 59.39% and 94.86%, respectively. The hydroxyl radical scavenging ability of the derivatives was only 18.89%. The antifungal activities of chitooligosaccharide derivatives against Diaporthe batatas and Phytophthora capsici were studied by the growth rate method. Compared with chitooligosaccharide itself, derivatives were inhibited by 97.77% and 100%. The above results showed that chitooligosaccharide derivatives have good biocompatibility and can be used in food, agriculture and medicine.
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Affiliation(s)
- Fang Wen
- College of Sciences, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Yao Liu
- College of Sciences, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Hehe Yang
- College of Sciences, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Xu Yan
- College of Sciences, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - YanDong Zhang
- College of Sciences, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Zhimei Zhong
- College of Sciences, Inner Mongolia Agricultural University, Hohhot, 010018, China; Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource, Hohhot, 010018, China; Key Laboratory of Agricultural Ecological Security and Green Development at Universities of Inner Mongolia Autonomous Region, Hohhot, 010018, China.
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6
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Yang H, Liu Y, Wen F, Yan X, Zhang Y, Zhong Z. Preparation, characterization, antioxidant and antifungal activities of benzoic acid compounds grafted onto chitosan. Int J Biol Macromol 2024; 259:129096. [PMID: 38159699 DOI: 10.1016/j.ijbiomac.2023.129096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/26/2023] [Accepted: 12/26/2023] [Indexed: 01/03/2024]
Abstract
The current study created three novel chitosan derivatives named BACS, PIBACS, and MHBACS by grafting benzoic acid (BA), p-isopropyl benzoic acid (PIBA), and m-hydroxybenzoic acid (MHBA) onto chitosan (CS). The structures of the derivatives were investigated using infrared spectroscopy (FT-IR) and nuclear magnetic resonance (13C NMR). The derivatives were discovered to be 45.06 %-60.49 % substituted using elemental analysis (EA). Based on the findings of in vitro antioxidant experiments (hydroxyl radical scavenging activity, superoxide anion radical scavenging activity, and DPPH radical scavenging activity), all of the derivatives had a higher hydroxyl radical scavenging activity than the chitosan raw material. MHBACS scavenged (31.02 ± 0.90)% of hydroxyl radicals at 0.5 mg/mL, 28.69 % more than chitosan raw. The derivatives scavenged more superoxide anion radicals than the chitosan feedstock at a particular concentration. For instance, at a test dose of 0.2 mg/mL, the scavenging rate of MHBACS on superoxide anion radicals was 7.75 % greater than that of chitosan raw materials. DPPH radical scavenging activity, on the other hand, was not as competent as chitosan feedstock. The growth rate approach was used to assess the potential of the three derivatives to inhibit the development of four phytopathogenic fungi. Chitosan derivatives have better antifungal efficacy than chitosan raw materials. PIBACS, MHBACS, BACS, and Wuyiencin inhibited Phytophthora capsici by (98.03 ± 1.95)%, (81.73 ± 1.63)%, (66.38 ± 1.81)%, and (93.01 ± 2.69)%, respectively, at 1.0 mg/mL. PIBACS had a higher inhibitory impact on Phytophthora capsici than the positive control. Based on the evidence presented above, it is reasonable to conclude that the addition of benzoic acid molecules increased the antioxidant and antifungal capabilities of chitosan.
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Affiliation(s)
- Hehe Yang
- College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Yao Liu
- College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Fang Wen
- College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Xu Yan
- College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Yandong Zhang
- College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Zhimei Zhong
- College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China; Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource, Hohhot 010018, China; Key Laboratory of Agricultural Ecological Security and Green Development at Universities of Inner Mongolia Autonomous Region, Hohhot 010018, China.
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7
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Vo QV, Thuy Hoa DT, Hoa NT, Tran MD, Mechler A. The radical scavenging activity of monocaffeoylquinic acids: the role of neighboring hydroxyl groups and pH levels. RSC Adv 2024; 14:4179-4187. [PMID: 38292262 PMCID: PMC10825902 DOI: 10.1039/d3ra08460d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 01/23/2024] [Indexed: 02/01/2024] Open
Abstract
Caffeoylquinic acids (CQAs) are well-known antioxidants. However, a key aspect of their radical scavenging activity - the mechanism of action - has not been addressed in detail thus far. Here we report on a computational study of the mechanism of activity of CQAs in scavenging hydroperoxyl radicals. In water at physiological pH, the CQAs demonstrated ≈ 104 times higher HOO˙ antiradical activity than in lipid medium (k(lipid) ≈ 104 M-1 s-1). The activity in the aqueous solution was determined by the hydrogen transfer mechanism of the adjacent hydroxyl group (O6'-H) of the dianion states (Γ = 93.2-95.2%), while the single electron transfer reaction of these species contributed 4.8-6.8% to the total rate constants. The kinetics estimated by the calculations are consistent with experimental findings in water (pH = 7.5), yielding a kcalculated/kexperimental = 2.4, reinforcing the reliability and precision of the computational method and demonstrating its utility for evaluating radical reactions in silico. The results also revealed the pH dependence of the HOO˙ scavenging activity of the CQAs; activity was comparable for all compounds below pH 3, however at higher pH values 5CQA reacted with the HOO˙ with lower activity than 3CQA or 4CQA. It was also found that CQAs are less active than Trolox below pH 4.7, however over pH 5.0 they showed higher activity than the reference. The CQAs had the best HOO˙ antiradical activity at pH values between 5.0 and 8.6. Therefore, in the physiological environment, the hydroperoxyl antiradical capacity of CQAs exhibits similarity to renowned natural antioxidants including resveratrol, ascorbic acid, and Trolox.
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Affiliation(s)
- Quan V Vo
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Duong Thi Thuy Hoa
- The University of Danang - University of Sciences and Education Danang 550000 Vietnam
| | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Manh Duc Tran
- The University of Danang - University of Sciences and Education Danang 550000 Vietnam
| | - Adam Mechler
- Department of Biochemistry and Chemistry, La Trobe University Victoria 3086 Australia
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8
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Picos-Salas MA, Leyva-López N, Bastidas-Bastidas PDJ, Antunes-Ricardo M, Cabanillas-Bojórquez LA, Angulo-Escalante MA, Heredia JB, Gutiérrez-Grijalva EP. Supercritical CO 2 extraction of naringenin from Mexican oregano (Lippia graveolens): its antioxidant capacity under simulated gastrointestinal digestion. Sci Rep 2024; 14:1146. [PMID: 38212400 PMCID: PMC10784293 DOI: 10.1038/s41598-023-50997-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 12/28/2023] [Indexed: 01/13/2024] Open
Abstract
A supercritical CO2 method was optimized to recover naringenin-rich extract from Mexican oregano (Lippia graveolens), a flavanone with high antioxidant and anti-inflammatory activity. The effect of the extraction parameters like pressure, temperature, and co-solvent on naringenin concentration was evaluated. We used response surface methodology to optimize the naringenin extraction from oregano; the chemical composition by UPLC-MS of the optimized extract and the effect of simulated gastrointestinal digestion on its antioxidant capacity and total phenolic content were also evaluated. The optimum conditions were 58.4 °C and 12.46% co-solvent (ethanol), with a pressure of 166 bar, obtaining a naringenin content of 46.59 mg/g extract. Also, supercritical optimized extracts yielded high quantities of cirsimaritin, quercetin, phloridzin, apigenin, and luteolin. The results indicated that the naringenin-rich extract obtained at optimized conditions had higher total phenolic content, antioxidant capacity by TEAC and ORAC, and flavonoid content, compared with the methanolic extract, and the simulated gastrointestinal digestion reduced all these values.
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Affiliation(s)
- Manuel Adrian Picos-Salas
- Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México
| | - Nayely Leyva-López
- Posdoc CONAHCYT-Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México
| | - Pedro de Jesús Bastidas-Bastidas
- Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México
| | - Marilena Antunes-Ricardo
- Tecnologico de Monterrey, Centro de Biotecnología FEMSA, Escuela de Ingeniería y Ciencias, Av. Eugenio Garza Sada 2501 Sur, Monterrey, NL, 64849, México
- Tecnologico de Monterrey, Institute for Obesity Research, Av. Eugenio Garza Sada 2501 Sur, 64849, Monterrey, NL, México
| | - Luis Angel Cabanillas-Bojórquez
- Posdoc CONAHCYT-Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México
| | - Miguel Angel Angulo-Escalante
- Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México
| | - J Basilio Heredia
- Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México
| | - Erick Paul Gutiérrez-Grijalva
- Functional Foods and Nutraceuticals Laboratory, Cátedras CONAHCYT-Centro de Investigación en Alimentación y Desarrollo A.C., Carretera a Eldorado Km 5.5, Col. Campo El Diez, 80110, Culiacán, Sinaloa, México.
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9
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Zhao X, Du B, Wan M, Li J, Qin S, Nian F, Tang D. Analysis of the antioxidant activity of toons sinensis extract and their biological effects on broilers. Front Vet Sci 2024; 10:1337291. [PMID: 38260193 PMCID: PMC10800727 DOI: 10.3389/fvets.2023.1337291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 12/18/2023] [Indexed: 01/24/2024] Open
Abstract
Plant extracts are rich in a variety of nutrients and contain a large number of bioactive compounds, and compared with traditional feed additives, they have advantages such as wide sources, natural safety and rich nutrition. This study employed in vitro antioxidant and animal experiments to comprehensively evaluate the use of Toona sinensis extract (TSE) in broiler production. 508 1-day-old Cobb 500 broilers were randomly assigned to the 7 experimental groups with 6 replications and 12 birds/replicate. Two groups received Vitamin C (VC) 300 g/t and Vitamin E 500 g/t, and five dose groups of TSE received 0, 300, 600, 900, and 1,200 g/t of TSE in their feed. The study spanned 42 days, with a starter phase (1-21 days) and a finisher phase (22-42 days). The results showed that compared to ascorbic acid, TSE had the scavenging ability of 2,2-Diphenyl-1-picrylhydrazyl and hydroxyl radical, with IC50 values of 0.6658 mg/mL and 33.1298 mg/mL, respectively. Compared to TSE 0 group, broilers fed with 1,200 g/t TSE showed significant weight gain during the starter phase and increased the feed-to-weight gain ratio during both the starter and finisher phases. Additionally, broilers receiving 1,200 g/t TSE had enhanced dry matter and organic matter utilization. Concerning meat quality, broilers in the 1,200 g/t TSE group demonstrated increased cooked meat yield, and pH value, as well as higher antioxidant capacity (T-AOC), dismutase (SOD), and glutathione peroxidase (GSH-PX) in serum. In addition, there was no significant difference in ileal microflora due to TSE supplementation. In summary, this study confirms the positive impact of a dietary inclusion of 1,200 g/t TSE on broiler growth, meat quality, and serum antioxidants.
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Affiliation(s)
- Xiangmin Zhao
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Baolong Du
- Yizhou District Animal Disease Prevention and Control Center, Hami, China
| | - Minyan Wan
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Jinlu Li
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Shizhen Qin
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Fang Nian
- College of Science, Gansu Agricultural University, Lanzhou, China
| | - Defu Tang
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
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10
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Hieu LT, Hoa NT, Mechler A, Vo QV. The Theoretical and Experimental Insights into the Radical Scavenging Activity of Rubiadin. J Phys Chem B 2023; 127:11045-11053. [PMID: 38103025 DOI: 10.1021/acs.jpcb.3c06366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Rubiadin (RBD), an anthraquinone derivative, is obtained from Rubia cordifolia, a plant species classified under the Rubiaceae family. Rubiadin has proven beneficial properties, such as anticancer, neuroprotective, anti-inflammatory, and antidiabetic activity. The antioxidant activity of this molecule was suggested by some experimental results but has not been clearly established thus far. In this study, we employ DFT calculations to comprehensively assess the mechanism and kinetics of the HO•/HOO• radical scavenging activity of this compound in relation to solvents. RBD showed moderate HO• radical scavenging activity, with rate constants of 2.95 × 108 and 1.82 × 1010 M-1 s-1 in lipid and polar media, respectively. In the aqueous solution, the compound exhibited remarkable superoxide anion radical scavenging activity (k = 4.93 × 108 M-1 s-1) but modest HOO• antiradical activity. RBD also showed promising antiradical activity against a variety of radicals (CCl3O•, CCl3OO•, NO2, SO4•-, and N3•), while experimental and computational results confirmed that RBD has moderate activity in DPPH/ABTS•+ assays. Thus, RBD is predicted to be a good, albeit selective, radical scavenger.
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Affiliation(s)
- Le Trung Hieu
- 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 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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11
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Wang W, Liu X, Wang L, Song G, Jiang W, Mu L, Li J. Ficus carica polysaccharide extraction via ultrasound-assisted technique: Structure characterization, antioxidant, hypoglycemic and immunomodulatory activities. ULTRASONICS SONOCHEMISTRY 2023; 101:106680. [PMID: 37956509 PMCID: PMC10661605 DOI: 10.1016/j.ultsonch.2023.106680] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/22/2023] [Accepted: 11/03/2023] [Indexed: 11/15/2023]
Abstract
In this research, the ultrasound-assisted extraction (UAE) conditions of the water-soluble polysaccharide (FCPS) from Ficus carica fruits were optimized using the response surface methodology. The optimal FCPS yield was 7.97 % achieved by conducting ultrasound-assisted extraction four times at a solid-liquid ratio of 1:20 (g/mL) and an ultrasound temperature of 70 °C. Then, the structure, antioxidant properties, hypoglycemic effects, and immunomodulatory activities of FCPS were evaluated. FCPS was characterized as irregular, rough-surfaced, flaky materials consisting of pyran-type polysaccharides with α- and β-glycosidic linkages, and composed of multiple monosaccharides and only one homogeneous concentrated polysaccharide component (FCPS1) with a molecular weight of 4.224 × 104 Da. The results suggested FCPS exhibited remarkable antioxidant activity in vitro, as evidenced by improved cell viability and reduced the reactive oxygen species (ROS) levels. Meanwhile, FCPS effectively improved liver-related insulin resistance by promoting glucose consumption in hepatocytes and activated the immune response through activation of murine bone marrow-derived dendritic cells (DCs) and upregulation of interleukin 6 (IL6) and interleukin 12 (IL-12) expression. The findings demonstrate the efficacy of the UAE technique in isolating FCPS with biological functionality and FCPS could potentially serve as a beneficial organic antioxidant source and functional food, carrying important implications for future studies.
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Affiliation(s)
- Weilan Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Xiaoying Liu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Lixue Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Guirong Song
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Wei Jiang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Lihong Mu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Jinyao Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China.
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12
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Spiegel M. Theoretical Insights into the Oxidative Stress-Relieving Properties of Pinocembrin─An Isolated Flavonoid from Honey and Propolis. J Phys Chem B 2023; 127:8769-8779. [PMID: 37816048 PMCID: PMC10591471 DOI: 10.1021/acs.jpcb.3c03545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 09/13/2023] [Indexed: 10/12/2023]
Abstract
Bee products are a valuable group of substances that have a wide range of applications for humans. They contain a high level of polyphenolic compounds, which have been shown to combat radicals and effectively reduce oxidative stress. In this study, density functional theory was utilized to determine the anti-OOH activity, sequestration of free Cu(II) and Fe(III) ions, the potential pro-oxidative activity of the formed complexes, and the repairing capabilities toward essential biomolecules. The kinetic constants for scavenging of hydroperoxide radical were found to be low, with an order of magnitude not exceeding 10-3 M-1 s-1. Chelating properties showed slightly more satisfactory outcomes, although most complexes exhibited pro-oxidant activity. Pinocembrin, however, proved effective in repairing oxidatively damaged biological compounds and restoring their original functionality. The study found that whilst the system displays limited type I and type II antioxidant activity, it may support the role of physiological reductants already present in the biological matrix.
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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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13
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Bay MV, Nam PC, Hoa NT, Mechler A, Vo QV. Antiradical Activity of Lignans from Cleistanthus sumatranus: Theoretical Insights into the Mechanism, Kinetics, and Solvent Effects. ACS OMEGA 2023; 8:38668-38675. [PMID: 37867707 PMCID: PMC10586290 DOI: 10.1021/acsomega.3c05964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 09/22/2023] [Indexed: 10/24/2023]
Abstract
Sumatranus lignans (SL) isolated from Cleistanthus sumatranus have demonstrated bioactivities, e.g., they were shown to exhibit immunosuppressive properties in previous research. Their structure suggests potential antioxidant activity that has not attracted any attention thus far. Consistently, a comprehensive analysis of the antioxidant activity of these compounds is highly desirable with the view of prospective medical applications. In this work, the mechanism and kinetics of the antiradical properties of SL against hydroperoxyl radicals were studied by using calculations based on density functional theory (DFT). In the lipid medium, it was discovered that SL reacted with HOO• through the formal hydrogen transfer mechanism with a rate constant of 101-105 M-1 s-1, whereas in aqueous media, the activity primarily occurred through the sequential proton loss electron transfer mechanism with rate constants of 102-108 M-1 s-1. In both lipidic and aqueous environments, the antiradical activity of compounds 6 and 7 exceeds that of resveratrol, ascorbic acid, and Trolox. These substances are therefore predicted to be good radical scavengers in physiological environments.
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Affiliation(s)
- Mai Van Bay
- The
University of Danang - University of Science and Education, Danang 550000, Vietnam
| | - Pham Cam Nam
- The
University of Danang - University of Science and Technology, 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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14
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Szerlauth A, Varga S, Szilagyi I. Molecular Antioxidants Maintain Synergistic Radical Scavenging Activity upon Co-Immobilization on Clay Nanoplatelets. ACS Biomater Sci Eng 2023; 9:5622-5631. [PMID: 37738637 PMCID: PMC10565722 DOI: 10.1021/acsbiomaterials.3c00909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 09/12/2023] [Indexed: 09/24/2023]
Abstract
Unbalanced levels of reactive oxygen species (ROS) result in oxidative stress, affecting both biomedical and industrial processes. Antioxidants can prevent ROS overproduction and thus delay or inhibit their harmful effects. Herein, activities of two molecular antioxidants (gallic acid (GA), a well-known phenolic compound, and nicotinamide adenine dinucleotide (NADH), a vital biological cofactor) were tested individually and in combination to assess possible synergistic, additive, or antagonistic effects in free radical scavenging and in redox capacity assays. GA was a remarkable radical scavenger, and NADH exhibited moderate antioxidant activity, while their combination at different molar ratios led to a synergistic effect since the resulting activity was superior to the sum of the individual GA and NADH activities. Their coimmobilization was performed on the surface of delaminated layered double hydroxide clay nanoplatelets by electrostatic interactions, and the synergistic effect was maintained upon such a heterogenization of these molecular antioxidants. The coimmobilization of GA and NADH expands the range of their potential applications, in which separation of antioxidant additives is important during treatments or manufacturing processes.
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Affiliation(s)
- Adel Szerlauth
- MTA-SZTE Lendület
Biocolloids Research Group, Department of Physical Chemistry and Materials
Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
| | - Szilárd Varga
- MTA-SZTE Lendület
Biocolloids Research Group, Department of Physical Chemistry and Materials
Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
| | - Istvan Szilagyi
- MTA-SZTE Lendület
Biocolloids Research Group, Department of Physical Chemistry and Materials
Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
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15
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Boulebd H, Spiegel M. Computational assessment of the primary and secondary antioxidant potential of alkylresorcinols in physiological media. RSC Adv 2023; 13:29463-29476. [PMID: 37818267 PMCID: PMC10561184 DOI: 10.1039/d3ra05967g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 09/29/2023] [Indexed: 10/12/2023] Open
Abstract
Alkylresorcinols are a group of natural phenolic compounds found in various foods such as whole grain cereals, bread, and certain fruits. They are known for their beneficial health effects, such as anti-inflammatory and anti-cancer properties. This study aimed to evaluate the antioxidant activity of two typical alkylresorcinols namely olivetol and olivetolic acid (Oli and OliA) under physiological conditions. The free radical scavenging capacity of Oli and OliA toward oxygenated free radicals (HO˙ and HOO˙ radicals) was investigated using thermodynamic and kinetic calculations. The results revealed that Oli and OliA are potent scavengers of HO˙ radical in both polar and lipid media, acting exclusively via the FHT (formal hydrogen transfer) mechanism. Moreover, they demonstrated excellent scavenging activity toward HOO˙ radical in water via the SET (single electron transfer) mechanism, outperforming the common antioxidant BHT. In lipid media, Oli and OliA showed moderate scavenging activity toward HOO˙ radical via the FHT mechanism. Significant prooxidant potential of OliA- was also demonstrated through the formation of complexes with copper ions. Additionally, docking studies indicate that the compounds exhibited a good affinity for ROS-producing enzymes, including myeloperoxidase (MP), cytochrome P450 (CP450), lipoxygenase (LOX), and xanthine oxidase (XO), highlighting their potential as natural antioxidants with promising therapeutic applications.
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Affiliation(s)
- Houssem Boulebd
- Department of Chemistry, Faculty of Exact Science, University of Constantine 1 Constantine 25000 Algeria
| | - Maciej Spiegel
- Department of Pharmacognosy and Herbal Medicines, Faculty of Pharmacy, Wroclaw Medical University Borowska 211A 50-556 Wroclaw Poland
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16
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Boulebd H, Carmena-Bargueño M, Pérez-Sánchez H. Exploring the Antioxidant Properties of Caffeoylquinic and Feruloylquinic Acids: A Computational Study on Hydroperoxyl Radical Scavenging and Xanthine Oxidase Inhibition. Antioxidants (Basel) 2023; 12:1669. [PMID: 37759973 PMCID: PMC10526077 DOI: 10.3390/antiox12091669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/04/2023] [Accepted: 08/11/2023] [Indexed: 09/29/2023] Open
Abstract
Caffeoylquinic (5-CQA) and feruloylquinic (5-FQA) acids, found in coffee and other plant sources, are known to exhibit diverse biological activities, including potential antioxidant effects. However, the underlying mechanisms of these phenolic compounds remain elusive. This paper investigates the capacity and mode of action of 5-CQA and 5-FQA as natural antioxidants acting as hydroperoxyl radical scavengers and xanthine oxidase (XO) inhibitors. The hydroperoxyl radical scavenging potential was investigated using thermodynamic and kinetic calculations based on the DFT method, taking into account the influence of physiological conditions. Blind docking and molecular dynamics simulations were used to investigate the inhibition capacity toward the XO enzyme. The results showed that 5-CQA and 5-FQA exhibit potent hydroperoxyl radical scavenging capacity in both polar and lipidic physiological media, with rate constants higher than those of common antioxidants, such as Trolox and BHT. 5-CQA carrying catechol moiety was found to be more potent than 5-FQA in both physiological environments. Furthermore, both compounds show good affinity with the active site of the XO enzyme and form stable complexes. The hydrogen atom transfer (HAT) mechanism was found to be exclusive in lipid media, while both HAT and SET (single electron transfer) mechanisms are possible in water. 5-CQA and 5-FQA may, therefore, be considered potent natural antioxidants with potential health benefits.
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Affiliation(s)
- Houssem Boulebd
- Department of Chemistry, Faculty of Exact Science, University of Constantine 1, Constantine 25000, Algeria
| | - Miguel Carmena-Bargueño
- Structural Bioinformatics and High-Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, 30107 Guadalupe, Spain; (M.C.-B.); (H.P.-S.)
| | - Horacio Pérez-Sánchez
- Structural Bioinformatics and High-Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, 30107 Guadalupe, Spain; (M.C.-B.); (H.P.-S.)
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17
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Harper P. A Review of the Dietary Intake, Bioavailability and Health Benefits of Ellagic Acid (EA) with a Primary Focus on Its Anti-Cancer Properties. Cureus 2023; 15:e43156. [PMID: 37692691 PMCID: PMC10484468 DOI: 10.7759/cureus.43156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/08/2023] [Indexed: 09/12/2023] Open
Abstract
Ellagitannins (ET) and ellagic acid (EA) are polyphenols, present in common foods, which may exhibit significant health benefits against inflammation, infection and cancer. EA is metabolised by the gut flora to produce urolithins, which are absorbed into the systemic circulation. Urolithins are widely documented to reduce oxidative stress associated with many diseases including cancer, heart disease and liver damage. In particular, Urolithin C and D have been shown to have high anti-oxidant properties through the inhibition of reactive oxygen species (ROS). The anti-inflammatory properties of EA have been demonstrated through the down-regulation of pro-inflammatory enzymes such as COX-2 and iNOS as well as decreasing the expression of adhesion molecules. EA also regulates the gut microflora and possesses antimicrobial activity against various strains of harmful bacteria such as methicillin-resistant Staphylococcus aureus (MRSA) and Helicobacter pylori. Numerous studies have documented the anticarcinogenic benefits of EA and have been performed on, but not limited to, prostate, colon and breast cancer cell lines and in vivo models. Conventional treatments for cancer, such as chemotherapy, can often be associated with significant side effects such as fatigue, hair loss and alopecia. Naturally-occurring food substances such as ETs potentially offer a risk-free preventative measure against cancer and could perhaps be used in synergy with current treatments. More level 1 studies are required to inform the evidence-base on this topic.
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Affiliation(s)
- Philip Harper
- Life Sciences, University of Southampton, Southampton, GBR
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18
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Zeppilli D, Aldinio-Colbachini A, Ribaudo G, Tubaro C, Dalla Tiezza M, Bortoli M, Zagotto G, Orian L. Antioxidant Chimeric Molecules: Are Chemical Motifs Additive? The Case of a Selenium-Based Ligand. Int J Mol Sci 2023; 24:11797. [PMID: 37511560 PMCID: PMC10380222 DOI: 10.3390/ijms241411797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023] Open
Abstract
We set up an in silico experiment and designed a chimeric compound integrating molecular features from different efficient ROS (Reactive Oxygen Species) scavengers, with the purpose of investigating potential relationships between molecular structure and antioxidant activity. Furthermore, a selenium centre was inserted due to its known capacity to reduce hydroperoxides, acting as a molecular mimic of glutathione peroxidase; finally, since this organoselenide is a precursor of a N-heterocyclic carbene ligand, its Au(I) carbene complex was designed and examined. A validated protocol based on DFT (Density Functional Theory) was employed to investigate the radical scavenging activity of available sites on the organoselenide precursor ((SMD)-M06-2X/6-311+G(d,p)//M06-2X/6-31G(d)), as well as on the organometallic complex ((SMD)-M06-2X/SDD (Au), 6-311+G(d,p)//ZORA-BLYP-D3(BJ)/TZ2P), considering HAT (Hydrogen Atom Transfer) and RAF (Radical Adduct Formation) regarding five different radicals. The results of this case study suggest that the antioxidant potential of chemical motifs should not be considered as an additive property when designing a chimeric compound, but rather that the relevance of a molecular topology is derived from a chemical motif combined with an opportune chemical space of the molecule. Thus, the direct contributions of single functional groups which are generally thought of as antioxidants per se do not guarantee the efficient radical scavenging potential of a molecular species.
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Affiliation(s)
- Davide Zeppilli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Anna Aldinio-Colbachini
- CNRS, Aix Marseille Université, BIP, IMM, IM2B, 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Giovanni Ribaudo
- Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Cristina Tubaro
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Marco Dalla Tiezza
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Marco Bortoli
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, 0315 Oslo, Norway
| | - Giuseppe Zagotto
- Dipartimento di Scienze del Farmaco, Università degli Studi di Padova, Via Marzolo 5, 35131 Padova, Italy
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
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19
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Djafarou S, Mermer A, Barut B, Yılmaz GT, Amine Khodja I, Boulebd H. Synthesis and evaluation of the antioxidant and anti-tyrosinase activities of thiazolyl hydrazone derivatives and their application in the anti-browning of fresh-cut potato. Food Chem 2023; 414:135745. [PMID: 36821926 DOI: 10.1016/j.foodchem.2023.135745] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 01/24/2023] [Accepted: 02/16/2023] [Indexed: 02/21/2023]
Abstract
Tyrosinase is a key enzyme in the biosynthesis of melanin, which is responsible for the browning of foods as well as many skin disorders. In order to develop new anti-browning agents with dual antioxidant and anti-tyrosinase capacities, a series of 30 thiazolyl hydrazone derivatives were synthesized. Among the molecules prepared, 6 and 30 were found to be the most potent tyrosinase inhibitors with IC50 values comparable to that of kojic acid. Interestingly, 6 also has the highest radical scavenging activity among the prepared molecules. The inhibition kinetics study indicated that 6 is a non-competitive inhibitor while 30 inhibits tyrosinase competitively. The anti-browning assay of fresh-cut potato slices revealed that 6 and 30 are potent anti-browning agents with a capacity as high as kojic acid. The mechanisms of free radical scavenging and tyrosinase inhibition have been fully investigated in silico using computational kinetics, molecular docking, and molecular dynamics simulations.
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Affiliation(s)
- Selsabil Djafarou
- Department of Chemistry, Faculty of Exact Science, University of Constantine 1, Constantine 25000, Algeria
| | - Arif Mermer
- Experimental Mecidine Application and Research Center, University of Health Sciences, İstanbul, Türkiye; Department of Biotechnology, University of Health Sciences, İstanbul, Türkiye.
| | - Burak Barut
- Department of Biochemistry, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Gizem Tatar Yılmaz
- Department of Biostatistics and Medical Informatics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Imene Amine Khodja
- Department of Chemistry, Faculty of Exact Science, University of Constantine 1, Constantine 25000, Algeria
| | - Houssem Boulebd
- Department of Chemistry, Faculty of Exact Science, University of Constantine 1, Constantine 25000, Algeria.
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20
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Lu XQ, Qin S, Li J. Radical Scavenging Capability and Mechanism of Three Isoflavonoids Extracted from Radix Astragali: A Theoretical Study. Molecules 2023; 28:5039. [PMID: 37446701 DOI: 10.3390/molecules28135039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/21/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
As a valuable traditional Chinese herbal medicine, Radix Astragali has attracted much attention due to its extensive pharmacological activities. In this study, density functional theory (DFT) was used thermodynamically and kinetically in detail to predict the antioxidant activity and reaction mechanisms involved in the free radical scavenging reactions of three representative isoflavonoids (formononetin, calycosin, and calycosin-7-glucoside) extracted from Radix Astragali. Three main mechanisms, including hydrogen atom transfer (HAT), proton transfer after electron transfer (SET-PT), and sequential proton loss electron transfer (SPLET) were examined by calculating the thermodynamic parameters. It was found that HAT is the predominant mechanism in the gas phase, while SPLET is supported in the solvent environment. The isoflavonoids' order of antioxidant activity was estimated as: calycosin > calycosin-7-glucoside > formononetin. For the calycosin compound, the result revealed the feasibility of double HAT mechanisms, which involve the formation of stable benzodioxazole with significantly reduced energy in the second H+/e- reaction. In addition, the potential energy profiles and kinetic calculations show that the reaction of •OH into the 3'-OH site of calycosin has a lower energy barrier (7.2 kcal/mol) and higher rate constant (4.55 × 109 M-1 s-1) compared with other reactions in the gas phase.
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Affiliation(s)
- Xiao-Qin Lu
- Shanxi Center for Testing of Functional Agro-Products, Shanxi Agricultural University, Taiyuan 030031, China
| | - Shu Qin
- Shanxi Center for Testing of Functional Agro-Products, Shanxi Agricultural University, Taiyuan 030031, China
| | - Jindong Li
- Shanxi Center for Testing of Functional Agro-Products, Shanxi Agricultural University, Taiyuan 030031, China
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21
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Amić A, Mastiľák Cagardová D. A DFT Study on the Kinetics of HOO •, CH 3OO •, and O 2•- Scavenging by Quercetin and Flavonoid Catecholic Metabolites. Antioxidants (Basel) 2023; 12:1154. [PMID: 37371883 DOI: 10.3390/antiox12061154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 06/29/2023] Open
Abstract
Reaction kinetics have been theoretically examined to ascertain the potency of quercetin (Q) and flavonoid catecholic metabolites 1-5 in the inactivation of HOO•, CH3OO•, and O2•- under physiological conditions. In lipidic media, the koverallTST/Eck rate constants for the proton-coupled electron transfer (PCET) mechanism indicate the catecholic moiety of Q and 1-5 as the most important in HOO• and CH3OO• scavenging. 5-(3,4-Dihydroxyphenyl)-γ-valerolactone (1) and alphitonin (5) are the most potent scavengers of HOO• and CH3OO•, respectively. The koverallMf rate constants, representing actual behavior in aqueous media, reveal Q as more potent in the inactivation of HOO• and CH3OO• via single electron transfer (SET). SET from 3-O- phenoxide anion of Q, a structural motif absent in 1-5, represents the most contributing reaction path to overall activity. All studied polyphenolics have a potency of O2•- inactivation via a concerted two-proton-coupled electron transfer (2PCET) mechanism. The obtained results indicate that metabolites with notable radical scavenging potency, and more bioavailability than ingested flavonoids, may contribute to human health-promoting effects ascribed to parent molecules.
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Affiliation(s)
- Ana Amić
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Ulica cara Hadrijana 8A, 31000 Osijek, Croatia
| | - Denisa Mastiľák Cagardová
- Institute of Physical Chemistry and Chemical Physics, Department of Chemical Physics, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37 Bratislava, Slovakia
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22
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Ma G, Wang Y, Li Y, Zhang L, Gao Y, Li Q, Yu X. Antioxidant properties of lipid concomitants in edible oils: A review. Food Chem 2023; 422:136219. [PMID: 37148851 DOI: 10.1016/j.foodchem.2023.136219] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/04/2023] [Accepted: 04/18/2023] [Indexed: 05/08/2023]
Abstract
Edible oils are indispensable for human life, providing energy and necessary fatty acids. Nevertheless, they are vulnerable to oxidation via a number of different mechanisms. Essential nutrients deteriorate as well as toxic substances are produced when edible oils are oxidized; thus, they should be retarded wherever possible. Lipid concomitants have a strong antioxidant capacity and are a large class of biologically active chemical substances in edible oils. They have shown remarkable antioxidant properties and were documented to improve the quality of edible oils in varied ways. An overview of the antioxidant properties of the polar, non-polar, and amphiphilic lipid concomitants present in edible oils is provided in this review. Interactions among various lipid concomitants and the probable mechanisms are also elucidated. This review may provide a theoretical basis and practical reference for food industry practitioners and researchers to understand the underlying cause of variations in the quality of edible oils.
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Affiliation(s)
- Gaiqin Ma
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China
| | - Yuanyuan Wang
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China
| | - Yuefan Li
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China
| | - Lingyan Zhang
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China
| | - Yuan Gao
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China
| | - Qi Li
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China
| | - Xiuzhu Yu
- Shaanxi Union Research Center of University and Enterprise for Functional Oil Engineering Technology, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road Yangling, 712100 Shaanxi, PR China.
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23
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Guo S, Gu D, Liu C, Tang S, Wang Y, Yang Y. High-speed counter-current chromatographic separation and thermodynamic mechanism of an antioxidant from Morus alba leaves. BIOCHEM SYST ECOL 2023. [DOI: 10.1016/j.bse.2023.104617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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24
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Rosa-Martínez E, Bovy A, Plazas M, Tikunov Y, Prohens J, Pereira-Dias L. Genetics and breeding of phenolic content in tomato, eggplant and pepper fruits. FRONTIERS IN PLANT SCIENCE 2023; 14:1135237. [PMID: 37025131 PMCID: PMC10070870 DOI: 10.3389/fpls.2023.1135237] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 03/07/2023] [Indexed: 06/19/2023]
Abstract
Phenolic acids and flavonoids are large groups of secondary metabolites ubiquitous in the plant kingdom. They are currently in the spotlight due to the numerous health benefits associated with their consumption, as well as for their vital roles in plant biological processes and in plant-environment interaction. Tomato, eggplant and pepper are in the top ten most consumed vegetables in the world, and their fruit accumulation profiles have been extensively characterized, showing substantial differences. A broad array of genetic and genomic tools has helped to identify QTLs and candidate genes associated with the fruit biosynthesis of phenolic acids and flavonoids. The aim of this review was to synthesize the available information making it easily available for researchers and breeders. The phenylpropanoid pathway is tightly regulated by structural genes, which are conserved across species, along with a complex network of regulatory elements like transcription factors, especially of MYB family, and cellular transporters. Moreover, phenolic compounds accumulate in tissue-specific and developmental-dependent ways, as different paths of the metabolic pathway are activated/deactivated along with fruit development. We retrieved 104 annotated putative orthologues encoding for key enzymes of the phenylpropanoid pathway in tomato (37), eggplant (29) and pepper (38) and compiled 267 QTLs (217 for tomato, 16 for eggplant and 34 for pepper) linked to fruit phenolic acids, flavonoids and total phenolics content. Combining molecular tools and genetic variability, through both conventional and genetic engineering strategies, is a feasible approach to improve phenolics content in tomato, eggplant and pepper. Finally, although the phenylpropanoid biosynthetic pathway has been well-studied in the Solanaceae, more research is needed on the identification of the candidate genes behind many QTLs, as well as their interactions with other QTLs and genes.
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Affiliation(s)
- Elena Rosa-Martínez
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Valencia, Spain
| | - Arnaud Bovy
- Plant Breeding, Wageningen University & Research, Wageningen, Netherlands
| | - Mariola Plazas
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Valencia, Spain
| | - Yury Tikunov
- Plant Breeding, Wageningen University & Research, Wageningen, Netherlands
| | - Jaime Prohens
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Valencia, Spain
| | - Leandro Pereira-Dias
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Valencia, Spain
- Faculdade de Ciências, Universidade do Porto, Porto, Portugal
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25
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Zhao J, Shi S, Zhang X, Liu Y, Yuan M, Cheng G, Wang Y. Confusoside, a dihydrochalcone glucoside, prevents acetaminophen-induced liver injury by modulating the Nrf2/NF-κB/caspase signaling pathway. Food Funct 2023; 14:2432-2443. [PMID: 36786681 DOI: 10.1039/d2fo03497b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Dihydrochalcones are important bioactive ingredients in plants. Anneslea fragrans is an edible and medicinal plant, and its leaves are rich in dihydrochalcones. Confusoside (CF) is the most abundant dihydrochalcone in A. fragrans leaves, which is traditionally used in the treatment of liver diseases. The aim of this study was to investigate the hepatoprotective effect of CF on acetaminophen (APAP)-induced hepatic injury in mice. CF could reduce the levels of AST, ALT, and LDH in the serum and enhance the antioxidant activity by activating the Nrf2 signaling pathway to increase the activities of antioxidant enzymes (SOD and CAT), and the GSH content but decrease the MDA accumulation in liver tissues. Immunofluorescence assay and western blotting analysis showed that CF can regulate Nrf2 into the cell nucleus, thereby promoting the expression of downstream antioxidant-related proteins, including NQO1 and HO-1. In addition, CF could inhibit the liver inflammatory response by suppressing the activation of the NF-κB signaling pathway to reduce the expressions of TNF-α, IL-1β, IL-6, and NO. Molecular docking results showed that there was good binding between the CF and Keap1-Nrf2 protein. Western blotting and TUNEL analysis also revealed CF-inhibited cell apoptosis-related protein expression (Bcl2 and caspase-3/9 proteins). Thus, the CF from A. fragrans leaves could be served as an alternative hepaprotective agent for the treatment and prevention of APAP-induced liver injury.
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Affiliation(s)
- Jinghao Zhao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650500, Yunnan, China.
| | - Shang Shi
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650500, Yunnan, China.
| | - Xiaoyu Zhang
- The faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Yaping Liu
- The faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Minglong Yuan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650500, Yunnan, China. .,School of Chemistry and Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, Yunnan, China
| | - Guiguang Cheng
- The faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Yudan Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming 650500, Yunnan, China. .,School of Chemistry and Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, Yunnan, China
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26
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Nenadis N, Pyrka I, Tsimidou MZ. The Contribution of Theoretical Prediction Studies to the Antioxidant Activity Assessment of the Bioactive Secoiridoids Encountered in Olive Tree Products and By-Products. Molecules 2023; 28:2267. [PMID: 36903511 PMCID: PMC10005156 DOI: 10.3390/molecules28052267] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 02/21/2023] [Indexed: 03/05/2023] Open
Abstract
Assessment of the antioxidant activity of different types of natural compounds is a complex research area that encompasses various in vitro tests and in vivo studies. Sophisticated modern analytical tools permit the unambiguous characterization of the compounds present in a matrix. The contemporary researcher, knowing the chemical structure of the compounds present, can carry out quantum chemical calculations that provide important physicochemical information assisting the prediction of antioxidant potential and the mechanism behind the activity of target compounds before further experimentation. The efficiency of calculations is steadily improved due to the rapid evolution of both hardware and software. It is possible, consequently, to study compounds of medium or even larger size, incorporating also models that simulate the liquid phase (solution). This review contributes to the establishment of theoretical calculations as an inherent part of the antioxidant activity assessment process, having as a case study the complex mixtures of olive bioactive secoiridoids (oleuropein, ligstroside, and related compounds). The literature indicates great variability in theoretical approaches and models used so far for only a limited number of this group of phenolic compounds. Proposals are made for standardization of methodology (reference compounds, DFT functional, basis set size, and solvation model) to facilitate comparisons and communication of findings.
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Affiliation(s)
| | | | - Maria Z. Tsimidou
- Laboratory of Food Chemistry and Technology, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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27
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Zeppilli D, Ribaudo G, Pompermaier N, Madabeni A, Bortoli M, Orian L. Radical Scavenging Potential of Ginkgolides and Bilobalide: Insight from Molecular Modeling. Antioxidants (Basel) 2023; 12:antiox12020525. [PMID: 36830083 PMCID: PMC9952587 DOI: 10.3390/antiox12020525] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/12/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
The reactive oxygen species (ROS) scavenging capacities of ginkgolides and bilobalide, which are the peculiar constituents of the extract of Ginkgo biloba, are investigated in silico (level of theory: (SMD)-M06-2X/6-311+G(d,p)//M06-2X/6-31G(d)). Unlike other popular antioxidant natural substances, the carbon backbones of these compounds are entirely aliphatic and exclusively single C-C bonds are present. The selectivity for alkoxyl radicals via hydrogen-atom transfer (HAT) is assessed; importantly, the scavenging of peroxyl radicals is also possible from a peculiar site, here labeled C10 both for ginkgolides and bilobalide. The energetics are described in detail, and the analysis discloses that the studied compounds are powerful scavengers, with thermodynamic and kinetic properties similar to those of Trolox and melatonin, and that, in addition, they display selectivity for peroxyl radicals. These are all chemical-reactivity features contributing to the therapeutic action of the extract of G. biloba.
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Affiliation(s)
- Davide Zeppilli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129 Padova, Italy
| | - Giovanni Ribaudo
- Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Nicola Pompermaier
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129 Padova, Italy
| | - Andrea Madabeni
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129 Padova, Italy
| | - Marco Bortoli
- Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, 0315 Oslo, Norway
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129 Padova, Italy
- Correspondence:
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Hoa NT, Ngoc Van LT, Vo QV. Reactions of nicotine and the hydroxyl radical in the environment: Theoretical insights into the mechanism, kinetics and products. CHEMOSPHERE 2023; 314:137682. [PMID: 36586441 DOI: 10.1016/j.chemosphere.2022.137682] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/24/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Nicotine (NCT) is a prevalent and highly poisonous tobacco alkaloid found in wastewater discharge. Advanced oxidative processes (AOP) are radical interactions between harmful pollutants and ambient free radicals that, theoretically, result in less toxic compounds. For a better understanding of the chemical transformations and long-term environmental effects of toxic discharges, the study of these processes is crucial. Here, quantum chemical calculations are used to investigate the AOP of the NCT in aqueous and lipidic environments. It was found that NCT interacted with HO• in polar and nonpolar media, with an overall rate constant koverall = 106 - 1010 M-1 s-1. The computed kinetic data are reasonably accurate as seen by the comparison with the experimental rate constant in water (pH = 7.0), which results in a kcalculated/kexperimetal ratio of 1.4. The hydrogen transfer (C7, C9, C12)-single electron transfer pathways are the main mechanisms for the HO• + NCT reaction in pentyl ethanoate solvent to form the cations as the primary products of the two-step reaction. However, in aqueous environments, the degradation of NCT by HO• radicals increases with increasing pH levels. It is predicted that oxidation products are less toxic than nicotine itself, especially in an aqueous environment with a pH < 7.0.
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Affiliation(s)
- Nguyen Thi Hoa
- The University of Danang - University of Technology and Education, Danang, 550000, Viet Nam
| | | | - Quan V Vo
- The University of Danang - University of Technology and Education, Danang, 550000, Viet Nam.
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29
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Oyedemi SO, Atanes P, Aiyegoro OA, Amoo SO, Swain SS, Persaud SJ. In vitro profiling and functional assessments of the anti-diabetic capacity of phenolic-rich extracts of Bulbine natalensis and Bulbine frutescens. Diabet Med 2023; 40:e14770. [PMID: 34919745 DOI: 10.1111/dme.14770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 12/14/2021] [Indexed: 01/17/2023]
Abstract
AIMS Bulbine natalensis (BN) and Bulbine frutescens (BF) are recommended in South African traditional medicine to treat diabetes, but their modes of action are unknown. This study assessed the phenolic acid profiles, mineral composition and in vitro functional effects of BN and BF to better understand their glucose-lowering capabilities. METHODS Phenolic acid and mineral composition of BN and BF methanolic extracts were determined by HPLC and inductively coupled plasma optical emission spectroscopy respectively. Antioxidant capacity was assessed by potassium ferricyanide reducing power and 2,2-diphenyl-2-picrylhydrazyl radical scavenging assays, and inhibition of alpha-amylase, alpha-glucosidase, pancreatic lipase and DPP4 was evaluated by standard enzyme assays. The effects of BN and BF extracts on insulin secretion were investigated using static incubations of isolated mouse islets and molecular docking analysis was used to identify interactions of BN and BF with partners that could mediate stimulatory effects on insulin secretion. RESULTS Methanolic extracts of BN and BF contained high concentrations of protocatechuic and gallic acids, and high levels of Zn, Mn and Cr. The extracts inhibited alpha-glucosidase, alpha-amylase, pancreatic lipase and DPP4 activities, and they also inhibited free radical generation. Both extracts significantly potentiated glucose-stimulated insulin secretion without significantly affecting basal insulin secretion or islet cell viability. Protocatechuic acid, the most abundant phenolic acid in the extracts, showed high affinity for PKA, PKC, DPP4 and CaMK II in the docking analysis. CONCLUSIONS BN and BF have multiple beneficial effects on glucoregulatory pathways and they, or their derivatives, could be developed to treat type 2 diabetes.
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Affiliation(s)
- Sunday O Oyedemi
- Department of Diabetes, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine King's College London, London, UK
- School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - Patricio Atanes
- Department of Diabetes, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine King's College London, London, UK
| | - Olayinka A Aiyegoro
- Research Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Stephen O Amoo
- Agricultural Research Council - Vegetable and Ornamental Plants, Pretoria, South Africa
- Indigenous Knowledge Systems Centre, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
- Department of Botany and Plant Biotechnology, Faculty of Science, University of Johannesburg, Auckland Park, South Africa
| | - Shasank S Swain
- Division of Microbiology & NCDs, ICMR-Regional Medical Research Centre, Bhubaneswar, Odisha, India
| | - Shanta J Persaud
- Department of Diabetes, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine King's College London, London, UK
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30
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Hu Y, Wang Z, Shen C, Jiang C, Zhu Z, Liang P, Li H, Zeng Q, Xue Y, Wu Y, Wang Y, Liu L, Zhu H, Yi Y, Liu Q. Influence of the pK a value on the antioxidant activity of licorice flavonoids under solvent-mediated effects. Arch Pharm (Weinheim) 2023; 356:e2200470. [PMID: 36707412 DOI: 10.1002/ardp.202200470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 01/29/2023]
Abstract
Licorice flavonoids (LCFs) have been widely used in food care and medical treatment due to their significant antioxidant activities. However, the molecular mechanism of their antioxidant activity remains unclear. Therefore, network pharmacology, ADMET, density functional theory (DFT), molecular docking, and molecular dynamics (MD) simulation were employed to explore the molecular mechanism of the antioxidant effects of LCF. The network pharmacology and ADMET studies showed that the active molecules of kumatakenin (pKa = 6.18), licoflavonol (pKa = 6.86), and topazolin (pKa = 6.21) in LCF are key antioxidant components and have good biosafety. Molecular docking and MD simulation studies demonstrated that active molecules interacted with amino acid residues in target proteins to form stable protein-ligand complexes and exert their antioxidant effects. DFT studies showed that the antioxidant activity of LCF could be significantly modulated under the solvent-mediated effect. In addition, based on the derivation of the Henderson-Hasselbalch and van't Hoff formulas, the functional relationships between the reaction-free energy (ΔG) of LCF and the pH and pKa values were established. The results showed that active molecules with larger pKa values will be more conducive to the improvement of their antioxidant activity under solvent-mediated effects. In conclusion, this study found that increasing the pKa value of LCF would be an effective strategy to improve their antioxidant activity under the effect of solvent mediation. The pKa value of an LCF will be a direct standard to evaluate its solvent-mediated antioxidant activity. This study will provide theoretical guidance for the development of natural antioxidants.
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Affiliation(s)
- Yi Hu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Zhuxian Wang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Chunyan Shen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - CuiPing Jiang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Zhaoming Zhu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Peiyi Liang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Hui Li
- Department of Traditional Chinese Medicine, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Quanfu Zeng
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yaqi Xue
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yufan Wu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yuan Wang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Li Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Hongxia Zhu
- Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yankui Yi
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Qiang Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
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31
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Inversion Theory Leveling as a New Methodological Approach to Antioxidant Thermodynamics: A Case Study on Phenol. Antioxidants (Basel) 2023; 12:antiox12020282. [PMID: 36829841 PMCID: PMC9952401 DOI: 10.3390/antiox12020282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/13/2023] [Accepted: 01/18/2023] [Indexed: 01/31/2023] Open
Abstract
Antioxidants are various types of compounds that represent a link between biology and chemistry. With the development of theoretical and computational methods, antioxidants are now being studied theoretically. Here, a novel method is presented that aims to reduce the estimated wall times for DFT calculations that result in the same or higher degree of accuracy in the second derivatives over energy than is the case with the regular computational route (i.e., optimizing the reaction system at a lower model and then recalculating the energies at a higher level of theory) by applying the inversion of theory level to the universal chemical scavenger model, i.e., phenol. The resulting accuracy and wall time obtained with such a methodological setup strongly suggest that this methodology could be generally applied to antioxidant thermodynamics for some costly DFT methods with relative absolute deviation.
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Spiegel M, Ciardullo G, Marino T, Russo N. Computational investigation on the antioxidant activities and on the M pro SARS-CoV-2 non-covalent inhibition of isorhamnetin. Front Chem 2023; 11:1122880. [PMID: 36762196 PMCID: PMC9902383 DOI: 10.3389/fchem.2023.1122880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 01/09/2023] [Indexed: 01/25/2023] Open
Abstract
In the present work, we report a computational study on some important chemical properties of the flavonoid isorhamnetin, used in traditional medicine in many countries. In the course of the study we determined the acid-base equilibria in aqueous solution, the possible reaction pathways with the •OOH radical and the corresponding kinetic constants, the complexing capacity of copper ions, and the reduction of these complexes by reducing agents such as superoxide and ascorbic anion by using density functional level of theory Density Functional Theory. Finally, the non-covalent inhibition ability of the SARS-CoV-2 main protease enzyme by isorhamnetin was examined by molecular dynamics (MD) and docking investigation.
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Affiliation(s)
- Maciej Spiegel
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende, Cosenza, Italy,Department of Pharmacognosy and Herbal Medicines, Wroclaw Medical University, Wroclaw, Poland
| | - Giada Ciardullo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende, Cosenza, Italy
| | - Tiziana Marino
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende, Cosenza, Italy
| | - Nino Russo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Rende, Cosenza, Italy,*Correspondence: Nino Russo,
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Banc R, Rusu ME, Filip L, Popa DS. The Impact of Ellagitannins and Their Metabolites through Gut Microbiome on the Gut Health and Brain Wellness within the Gut-Brain Axis. Foods 2023; 12:foods12020270. [PMID: 36673365 PMCID: PMC9858309 DOI: 10.3390/foods12020270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 12/29/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Ellagitannins (ETs) are a large group of bioactive compounds found in plant-source foods, such as pomegranates, berries, and nuts. The consumption of ETs has often been associated with positive effects on many pathologies, including cardiovascular diseases, neurodegenerative syndromes, and cancer. Although multiple biological activities (antioxidant, anti-inflammatory, chemopreventive) have been discussed for ETs, their limited bioavailability prevents reaching significant concentrations in systemic circulation. Instead, urolithins, ET gut microbiota-derived metabolites, are better absorbed and could be the bioactive molecules responsible for the antioxidant and anti-inflammatory activities or anti-tumor cell progression. In this review, we examined the dietary sources, metabolism, and bioavailability of ETs, and analyzed the last recent findings on ETs, ellagic acid, and urolithins, their intestinal and brain activities, the potential mechanisms of action, and the connection between the ET microbiota metabolism and the consequences detected on the gut-brain axis. The current in vitro, in vivo, and clinical studies indicate that ET-rich foods, individual gut microbiomes, or urolithin types could modulate signaling pathways and promote beneficial health effects. A better understanding of the role of these metabolites in disease pathogenesis may assist in the prevention or treatment of pathologies targeting the gut-brain axis.
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Affiliation(s)
- Roxana Banc
- Department of Bromatology, Hygiene, Nutrition, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400349 Cluj-Napoca, Romania
| | - Marius Emil Rusu
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400010 Cluj-Napoca, Romania
- Correspondence: ; Tel.: +40-264-450-555
| | - Lorena Filip
- Department of Bromatology, Hygiene, Nutrition, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400349 Cluj-Napoca, Romania
| | - Daniela-Saveta Popa
- Department of Toxicology, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400349 Cluj-Napoca, Romania
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Alrawaiq NS, Atia A, Abdullah A. Effect of Administration of an Equal Dose of Selected Dietary Chemicals on Nrf2 Nuclear Translocation in the Mouse Liver. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:9291417. [PMID: 37077659 PMCID: PMC10110381 DOI: 10.1155/2023/9291417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 04/21/2023]
Abstract
Certain dietary chemicals influenced the expression of chemopreventive genes through the Nrf2-Keap1 pathway. However, the difference in Nrf2 activation potency of these chemicals is not well studied. This study is aimed at determining the difference in the potency of liver Nrf2 nuclear translocation induced by the administration of equal doses of selected dietary chemicals in mice. Male ICR white mice were administered 50 mg/kg of sulforaphane, quercetin, curcumin, butylated hydroxyanisole, and indole-3-carbinol for 14 days. On day 15, the animals were sacrificed, and their livers were isolated. Liver nuclear extracts were prepared, and Nrf2 nuclear translocation was detected through Western blotting. To determine the implication of the Nrf2 nuclear translocation on the expression levels of several Nrf2-regulated genes, liver RNA was extracted for qPCR assay. Equal doses of sulforaphane, quercetin, curcumin, butylated hydroxyanisole, and indole-3-carbinol significantly induced the nuclear translocation of Nrf2 with different intensities and subsequently increased the expression of Nrf2-regulated genes with an almost similar pattern as the Nrf2 nuclear translocation intensities (sulforaphane > butylated hydroxyanisole = indole-3-carbinol > curcumin > quercetin). In conclusion, sulforaphane is the most potent dietary chemical that induces the Nrf2 translocation into the nuclear fraction in the mouse liver.
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Affiliation(s)
- Nadia Salem Alrawaiq
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, 56000 Cheras, Kuala Lumpur, Malaysia
- Department of Pharmacology, Faculty of Pharmacy, Sebha University, Sebha, Libya
| | - Ahmed Atia
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, 56000 Cheras, Kuala Lumpur, Malaysia
- Department of Anaesthesia and Intensive Care, Faculty of Medical Technology, Tripoli University, Tripoli, Libya
| | - Azman Abdullah
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, 56000 Cheras, Kuala Lumpur, Malaysia
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35
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Ismail N, Abd Ghafar SA, Abu Bakar MZ. Antioxidant activity and phenolic content of black cumin seeds. BIOCHEMISTRY, NUTRITION, AND THERAPEUTICS OF BLACK CUMIN SEED 2023:169-188. [DOI: 10.1016/b978-0-323-90788-0.00006-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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36
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Effects of amino acids on the formation and distribution of glycerol core aldehydes during deep frying. Food Res Int 2023; 163:112257. [PMID: 36596168 DOI: 10.1016/j.foodres.2022.112257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 11/25/2022] [Accepted: 11/27/2022] [Indexed: 12/03/2022]
Abstract
Glyceryl core aldehyde (GCAs) are hazard factors produced during the frying process using oils and fats, and GCAs control and mitigation research is very important. This study investigated the effects of adding amino acids (methionine, glycine, and histidine) at 2.5, 5, and 10 mM on the formation and distribution of four GCAs during frying. High oleic sunflower oil (HOSO) was selected as frying oil for French fries. After 12 h of frying, the content of GCAs in the tert-butylhydroquinone-treated group (0.02 wt%, 1.1 mM) decreased by 29 % compared with the control group. The addition of methionine, glycine, and histidine decreased the total GCAs by 51 %, 28 %, and 27 %, respectively. The total GCAs content was best inhibited by methionine, while glycine and histidine were not significantly different from TBHQ. Methionine addition significantly reduced GCAs (9-oxo), GCAs (10-oxo-8), and GCAs (11-oxo-9) by 39 %, 78 %, and 80 %, respectively, while histidine was the most potent inhibitor of GCAs (8-oxo), which decreased by 40 %. Methionine also proved effective in slowing degradation of frying oil quality. These results provide a new direction for decreasing GCAs in frying systems.
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Boulebd H. Structure-activity relationship of antioxidant prenylated (iso)flavonoid-type compounds: quantum chemistry and molecular docking studies. J Biomol Struct Dyn 2022; 40:10373-10382. [PMID: 34176432 DOI: 10.1080/07391102.2021.1943529] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Prenylated (iso)flavonoid-type compounds are a subclass of natural flavonoids that have been reported to exhibit good antioxidant properties. In the present paper, the structure-activity relationship of three typical prenylated (iso)flavonoids namely 8-prenyldaidzein (Per), Licoflavone (Lic), and erysubin F (Ery) have been determined using DFT (density functional theory)-based calculations and molecular docking studies. As result, the CH bond of the prenyl substituent was found to be the most thermodynamically favorable site for trapping free radicals in the gas phase and lipid physiological environments. While the OH bond of the B-ring seems to be more reactive in water. HAT (hydrogen atom transfer) and SPLET (sequential proton loss electron transfer) play a decisive role in the antiradical activity of the studied compounds in lipid and polar physiological environments, respectively. All of the studied compounds exhibit strong binding affinity to both xanthine oxidase and inducible nitric oxide synthase enzymes by forming several hydrogen bonds and hydrophobic interactions with their respective catalytic sites. These results suggest that (iso)flavonoid-type compounds are promising radical scavengers and antioxidants. Communicated by Ramaswamy H. Sarma.
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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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38
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Haq KU, Rusdipoetra RA, Siswanto I, Suwito H. Elucidation of reactive oxygen species scavenging pathways of norbergenin utilizing DFT approaches. ROYAL SOCIETY OPEN SCIENCE 2022; 9:221349. [PMID: 36569231 PMCID: PMC9768466 DOI: 10.1098/rsos.221349] [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: 10/15/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Bergenin is a polyphenolic compound that contains isocoumarin skeletal derived from C-glycosylated 4-O-methylgallic acid. The biological activities of this compound and its derivatives are quite diverse. Recent studies reveal neuroprotective effects in vitro and in vivo in Alzheimer's. Norbergenin is a demethylated form of bergenin, known for better antioxidant capacity and associated with neuroprotective properties through oxidative stress inhibition. This study focused on investigating the scavenging mechanism of norbergenin with the •OH, •OOH, and O 2 ∙ - as a radical model under physiological and lipid environments. The thermodynamic and kinetic parameters of the hydrogen transfer (HT), single electron transfer (SET), sequential proton lost-electron transfer (SPLET) and radical adduct formation (RAF) mechanisms were determined theoretically by the density functional theory (DFT) at M06-2X/6-311 + + G(d,p) level of theory. Based on the computational results, this compound has proved as an excellent •OOH and •OH scavenger under physiological conditions better than Trolox and vitamin C, whereas its radical demonstrated as an efficient O 2 ∙ - scavenger.
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Affiliation(s)
- Kautsar Ul Haq
- Bioinformatics Division, University CoE-Research Center for Bio-Molecule Engineering, Universitas Airlangga, Surabaya 60115, Indonesia
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Indonesia
| | | | - Imam Siswanto
- Bioinformatics Division, University CoE-Research Center for Bio-Molecule Engineering, Universitas Airlangga, Surabaya 60115, Indonesia
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Indonesia
| | - Hery Suwito
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Indonesia
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39
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Primary and secondary antioxidant properties of scutellarin and scutellarein in water and lipid-like environments: A theoretical investigation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Inhibitory Effect on Nitric Oxide Release in LPS-Stimulated Macrophages and Free Radical Scavenging Activity of Croton linearis Jacq. Leaves. Antioxidants (Basel) 2022; 11:antiox11101915. [PMID: 36290638 PMCID: PMC9598791 DOI: 10.3390/antiox11101915] [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: 08/21/2022] [Revised: 09/22/2022] [Accepted: 09/23/2022] [Indexed: 12/02/2022] Open
Abstract
Oxidative stress is an important component of many diseases including cancer, along with inflammatory and neurodegenerative processes. Natural antioxidants have emerged as promising substances to protect the human body against reactive oxygen and nitrogen species. The present study evaluates the inhibition of nitric oxide (NO) production in LPS-stimulated RAW 264.7 murine macrophages and the free radical scavenging activity of Croton linearis Jacq. leaves. UPLC-QTOF-MS analysis identified 18 compounds: nine alkaloids with a morphinane, benzylisoquinoline or aporphine nucleus, and nine O-glycosylated-flavonoids with quercetin, kaempferol and isorhamnetin as the aglycones. The crude extract (IC50 21.59 µg/mL) and the n-hexane fraction (IC50 4.88 µg/mL) significantly reduced the NO production in LPS-stimulated macrophages but with relatively high cytotoxicity (CC50 75.30 and CC50 70.12 µg/mL, respectively), while the ethyl acetate fraction also showed good activity (IC50 40.03 µg/mL) without affecting the RAW 264.7 cell viability. On the other hand, the crude extract, as well as the dichloromethane and ethyl acetate fractions, showed better DPPH and ABTS free radical scavenging activities. Considering the chemical composition and the activity observed for Croton linearis leaves, they may be considered a good source of antioxidants to combat oxidative damage-related diseases.
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Mittal A, Vashistha VK, Das DK. Recent advances in the antioxidant activity and mechanisms of chalcone derivatives: a computational review. Free Radic Res 2022; 56:378-397. [PMID: 36063087 DOI: 10.1080/10715762.2022.2120396] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In this review, we have reported the antioxidant mechanisms and structure-antioxidant activity relationship of several chalcone derivatives, investigated in the recent past, based on the density functional theory (DFT) calculations, considering free radical scavenging and metal chelation ability. The antioxidant mechanisms include hydrogen atom transfer (HAT), sequential proton loss electron transfer (SPLET), single electron transfer followed by proton transfer (SET-PT), sequential proton loss hydrogen atom transfer (SPLHAT), sequential double proton loss electron transfer (SdPLET), sequential triple proton loss double electron transfer (StPLdET), sequential triple proton loss triple electron transfer (StPLtET), double HAT, double SPLET, double SET-PT, triple HAT, triple SET-PT, triple SPLET, proton-coupled electron transfer (PCET), single electron transfer (SET), radical adduct formation (RAF) and radical adduct formation followed by hydrogen atom abstraction (RAF-HAA). Furthermore, solvent effects have also been considered using different solvation models. The feasibility of scavenging different reactive oxygen and nitrogen species (ROS/RNS) has been discussed considering various factors such as the number and position of hydroxyl as well as methoxy groups present in the antioxidant molecule, stability of the species formed after scavenging reactive species, nature of substituent, steric effects, etc. This review opens new perspectives for designing new compounds with better antioxidant potential.
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Affiliation(s)
- Ankit Mittal
- Department of Chemistry, Institute of Applied Sciences and Humanities, GLA University, Mathura, India
| | - Vinod Kumar Vashistha
- Department of Chemistry, Institute of Applied Sciences and Humanities, GLA University, Mathura, India
| | - Dipak Kumar Das
- Department of Chemistry, Institute of Applied Sciences and Humanities, GLA University, Mathura, India
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Purushothaman A, Babu SS, Naroth S, Janardanan D. Antioxidant activity of caffeic acid: thermodynamic and kinetic aspects on the oxidative degradation pathway. Free Radic Res 2022; 56:617-630. [PMID: 36576261 DOI: 10.1080/10715762.2022.2161379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Caffeic acid is a phenolic secondary metabolite from plants, which is known for its antioxidant properties. The effective mitigation of methanol-induced oxidative stress by caffeic acid depends on the direct radical scavenging as well as the formation of new metabolites via oxidative degradation. Herein, thermodynamic and kinetic aspects of the oxidative degradation pathway of caffeic acid in the presence of radical CH3O• and its isomer, •CH2OH are discussed for the first time, employing density functional theory (DFT). The direct radical scavenging activity of caffeic acid against these radicals is verified via hydrogen atom transfer (HAT) and radical adduct formation (RAF) mechanisms. HAT is predicted to be more feasible than RAF mechanism as per the computed data. Additionally, energetic details of the proposed oxidative degradation pathway of radical adduct intermediates toward the formation of a cyclic metabolite is analyzed. Kinetic studies indicated a significant tunneling contribution to the H abstraction pathways having high activation barriers. Further, our results imply that the newly formed metabolites exhibit comparable antioxidant activity with that of caffeic acid.
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Affiliation(s)
- Aiswarya Purushothaman
- Computational Chemistry Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, India
| | - Smrithi S Babu
- Computational Chemistry Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, India
| | - Surya Naroth
- Computational Chemistry Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, India
| | - Deepa Janardanan
- Computational Chemistry Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, India
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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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44
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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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Šimunková M, Biela M, Štekláč M, Hlinčík A, Klein E, Malček M. Cu(II) complexes of flavonoids in solution: Impact of the Cu(II) ion on the antioxidant and DNA-intercalating properties. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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46
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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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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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49
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Shakira RM, Abd Wahab MK, Nordin N, Ariffin A. Antioxidant properties of butylated phenol with oxadiazole and hydrazone moiety at ortho position supported by DFT study. RSC Adv 2022; 12:17085-17095. [PMID: 35755585 PMCID: PMC9178441 DOI: 10.1039/d2ra02140d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/27/2022] [Indexed: 01/18/2023] Open
Abstract
Two series of 1,3,4-oxadiazole derivatives at the sixth position of the 2,4-di-tert-butylphenol group were synthesized. The antioxidant properties were evaluated by DPPH and FRAP assays. Compound 3 showed significant antioxidant activity, while its alkyl derivatives exhibited decreased antioxidant activity in both assays. The preferential antioxidant mechanism of the reactive antioxidant molecules prepared from the further reaction of compound 3 to produce compounds 4 and 6 was investigated using density functional theory. Calculating their comprehensive reactivity descriptors was used to assess their antioxidant reactivity. According to the calculated descriptors, compounds 4c and 6d are the most reactive antioxidants within their own group compared to the other derivative moieties. The results are identical to ascorbic acid's, indicating that they have similar activity. The experimental data and the calculated descriptors are in good agreement. The nature of the substituents and their positions have a significant impact on the derivatives' antioxidant capabilities. Two series of 1,3,4-oxadiazole derivatives at the sixth position of the 2,4-di-tert-butylphenol group were synthesized.![]()
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Affiliation(s)
- Raied M Shakira
- Department of Chemistry, Faculty of Science, Universiti Malaya 50603 Kuala Lumpur Malaysia +60 7967 4193 +60 7967 7022 +60 7967 4080.,Department of Chemistry, Ibn Al-Haitham University of Baghdad Baghdad Iraq
| | - Muhammad Kumayl Abd Wahab
- Department of Chemistry, Faculty of Science, Universiti Malaya 50603 Kuala Lumpur Malaysia +60 7967 4193 +60 7967 7022 +60 7967 4080
| | - Nurdiana Nordin
- Department of Chemistry, Faculty of Science, Universiti Malaya 50603 Kuala Lumpur Malaysia +60 7967 4193 +60 7967 7022 +60 7967 4080
| | - Azhar Ariffin
- Department of Chemistry, Faculty of Science, Universiti Malaya 50603 Kuala Lumpur Malaysia +60 7967 4193 +60 7967 7022 +60 7967 4080
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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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