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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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Tegin İ, Yabalak E, Hallaç B, Sabancı N, Fidan M, Sadık B. Unlocking the potential of Allium dictyoprasum C.A. Meyer ex Kunth: quantum chemical insights into radical scavenging, chemical composition, phenolic content, and antimicrobial activity. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024:1-18. [PMID: 39037127 DOI: 10.1080/09603123.2024.2382304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Accepted: 07/16/2024] [Indexed: 07/23/2024]
Abstract
Allium dictyoprasum C.A. Meyer ex Kunth (A. dictyoprasum) underwent comprehensive analysis, encompassing quantum chemical computations to assess its radical scavenging potential, chemical and elemental composition, total phenolic content, and antimicrobial activity. Experimental and theoretical investigations focused on elucidating the radical scavenging properties of polyhydroxy phenolic compounds present in the plant. Quantum chemical calculations were employed to evaluate the antioxidants employed to evaluate selected polyhydroxy phenolic molecules including flavonoids, hydrocinnamic acid derivatives, and hydroxybenzoic acid derivatives from natural sources. Thermochemical parameters of these compounds were calculated by the B3LYP/6-311 G++(d,p) level in both gas and solvent phases to elucidate the radical scavenging mechanism including hydrogen atom transfer (HAT), single electron transfer followed by proton transfer (SET-PT) and sequential proton loss electron transfer (SPLET). Analysis of A. dictyoprasum extracts obtained via various extraction methods revealed the presence of several major compounds, including dimethyl trisulfide, 3,5-Dihydroxy-6-methyl-2,3-dihydro-4 H-pyran-4-one, 2-Methoxy-4-vinylphenol, Dimethyl phthalate, Methyl palmitate, Methyl oleate, Methyl stearate, (9Z)-9-Octadecenamide. Notably, Malic acid and Quinic acid were identified as major compounds, with concentrations of 43.31 and 17.47 mg kg-1 extract, respectively, based on LC-MS/MS analysis. The total phenolic content of the extract was measured as 17.83 mg gallic acid/mL, while its free radical scavenging activity was 80.89% per mg/mL. Elemental analysis revealed significant levels of Mg, K, Na, Fe, and P, with minor concentrations of elements such as Ti, Tl, B, and Be. Furthermore, A. dictyoprasum exhibited notable antibacterial activity against various bacteria strains, surpassing the efficacy of some commercial antibiotics.
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Affiliation(s)
- İbrahim Tegin
- Faculty of Arts and Science, Department of Chemistry, Siirt University, Siirt, Türkiye
| | - Erdal Yabalak
- Department of Nanotechnology and Advanced Materials, Mersin University, Mersin, Türkiye
- Department of Chemistry and Chemical Processing Technologies, Technical Science Vocational School, Mersin University, Mersin, Türkiye
| | - Bülent Hallaç
- Faculty of Engineering, Department of Food Engineering, Siirt University, Siirt, Türkiye
| | - Nazmiye Sabancı
- Faculty of Arts and Science, Department of Chemistry, Siirt University, Siirt, Türkiye
| | - Mehmet Fidan
- Faculty of Arts and Science, Department of Biology, Siirt University, Siirt, Türkiye
| | - Betül Sadık
- Faculty of Arts and Science, Department of Chemistry, Siirt University, Siirt, Türkiye
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Dos Santos GA, Gomes JVT, da Silva ACP, Dos Santos JL, Bello ML, Santos BAMC. Computer-aided drug design supporting sunscreen research: a showcase study using previously synthesized hybrid UV filter-antioxidant compounds. J Mol Model 2024; 30:255. [PMID: 38970658 DOI: 10.1007/s00894-024-06056-2] [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: 03/17/2024] [Accepted: 06/28/2024] [Indexed: 07/08/2024]
Abstract
CONTEXT Although quantum mechanical calculations have proven effective in accurately predicting UV absorption and assessing the antioxidant potential of compounds, the utilization of computer-aided drug design (CADD) to support sustainable synthesis research of new sunscreen active ingredients remains an area with limited exploration. Furthermore, there are ongoing concerns about the safety and effectiveness of existing sunscreens. Therefore, it remains crucial to investigate photoprotection mechanisms and develop enhanced strategies for mitigating the harmful effects of UVR exposure, improving both the safety and efficacy of sunscreen products. A previous study conducted synthesis research on eight novel hybrid compounds (I-VIII) for use in sunscreen products by molecular hybridization of trans-resveratrol (RESV), avobenzone (AVO), and octinoxate (OMC). Herein, time-dependent density functional theory (TD-DFT) calculations performed in the gas phase on the isolated hybrid compounds (I-VIII) proved to reproduce the experimental UV absorption. Resveratrol-avobenzone structure-based hybrids (I-IV) present absorption maxima in the UVB range with slight differences between them, while resveratrol-OMC structure-based hybrids (V-VIII) showed main absorption in the UVA range. Among RESV-OMC hybrids, compounds V and VI exhibited higher UV absorption intensity, and compound VIII stood out for its broad-spectrum coverage in our simulations. Furthermore, both in silico and in vitro analyses revealed that compounds VII and VIII exhibited the highest antioxidant activity, with compound I emerging as the most reactive antioxidant within RESV-AVO hybrids. The study suggests a preference for the hydrogen atom transfer (HAT) mechanism over single-electron transfer followed by proton transfer (SET-PT) in the gas phase. With a strong focus on sustainability, this approach reduces costs and minimizes effluent production in synthesis research, promoting the eco-friendly development of new sunscreen active ingredients. METHODS The SPARTAN'20 program was utilized for the geometry optimization and energy calculations of all compounds. Conformer distribution analysis was performed using the Merck molecular force field 94 (MMFF94), and geometry optimization was carried out using the parametric method 6 (PM6) followed by density functional theory (DFT/B3LYP/6-31G(d)). The antioxidant behavior of the hybrid compounds (I-VIII) was determined using the highest occupied molecular orbital (εHOMO) and the lowest unoccupied molecular orbital (εLUMO) energies, as well as the bond dissociation enthalpy (BDE), ionization potential (IP), and proton dissociation enthalpy (PDE) values, all calculated at the same level of structural optimization. TD-DFT study is carried out to calculate the excitation energy using the B3LYP functional with the 6-31G(d) basis set. The calculated transitions were convoluted with a Gaussian profile using the Gabedit program.
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Affiliation(s)
- Gustavo Alencar Dos Santos
- Laboratório de Planejamento Farmacêutico e Simulação Computacional (LaPFarSC), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - João Victor Teixeira Gomes
- Laboratório de Planejamento Farmacêutico e Simulação Computacional (LaPFarSC), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Anne Cherem Peixoto da Silva
- Laboratório de Planejamento Farmacêutico e Simulação Computacional (LaPFarSC), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Jean Leandro Dos Santos
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista (UNESP), Câmpus Araraquara, Araraquara, SP, Brazil
| | - Murilo Lamim Bello
- Laboratório de Planejamento Farmacêutico e Simulação Computacional (LaPFarSC), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Bianca Aloise Maneira Corrêa Santos
- Laboratório de Planejamento Farmacêutico e Simulação Computacional (LaPFarSC), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
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Karthika AM, Thomas T, Augustine C. Computational studies on a selection of phosphite esters as antioxidants for polymeric materials. J Mol Model 2024; 30:244. [PMID: 38958769 DOI: 10.1007/s00894-024-06045-5] [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: 05/17/2024] [Accepted: 06/24/2024] [Indexed: 07/04/2024]
Abstract
CONTEXT Phosphite esters, a class of organo-phosphorus compounds, are widely used as non-discolouring antioxidants in many polymeric products. Apart from normal radical scavenging, they prevent the splitting of hydroperoxides (ROOH), one of the initial products of autoxidation, from forming extremely reactive free radicals such as alkoxy (RO.) and hydroxy (.OH) radicals. The inherent molecular properties of antioxidants and the chemistry of their action are essential for researchers working in this field of science. Four organo-phosphorous compounds well-known for their antioxidant activity are selected here for theoretical analysis: Tri(m-methylphenyl) phosphite (m-TMPP), Tri(4-methyl-2,6-di-tert-butylphenyl) phosphite (TMdtBPP), Tri(allylphenyl) phosphite (TAPP) and Tri(mercaptobenzothiazoyl) thiophosphate (TMBTTP). The antioxidant activity exhibited by these compounds is theoretically verified, and the results are consistent with the available experimental data. Such theoretical predictions offer advantages in scientific research, particularly when researchers need to select certain molecules as antioxidants for experiments from a pool of molecular systems. METHODS The chemical computations presented in this report are done in Gaussian 16 program package. The procedure of density functional theory (DFT) with the model chemistry B3LYP/6-31G(d,p) is used to generate computational data. Global reactivity indices, thermochemical data, Fukui functions, molecular electrostatic potential and NMR spectra are computed for the chosen molecular systems from their optimized geometries.
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Affiliation(s)
- A M Karthika
- Department of Chemistry, St. Berchmans College (Autonomous), Mahatma Gandhi University, Kottayam, India
| | - Tiju Thomas
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, India
| | - Cyril Augustine
- Department of Chemistry, St. Berchmans College (Autonomous), Mahatma Gandhi University, Kottayam, India.
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, India.
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Pham TL, Ha Nguyen TT, Nguyen TA, Le-Deygen I, Hanh Le TM, Vu XM, Le HK, Van CB, Usacheva TR, Mai TT, Tran DL. Antioxidant activity of an inclusion complex between rutin and β-cyclodextrin: experimental and quantum chemical studies. RSC Adv 2024; 14:18330-18342. [PMID: 38854829 PMCID: PMC11157499 DOI: 10.1039/d4ra02307b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 06/03/2024] [Indexed: 06/11/2024] Open
Abstract
This study aims to synthesize a guest-host complex derived from rutin (Rut) and β-cyclodextrin (β-CD) (denoted as [Rut⊂β-CD]). The obtained substance was characterized by the FT-IR and DSC methods, signifying the formation of an inclusion complex between Rut and β-CD. Complex formation increased the antioxidant activity of rutin corresponding to the decrease of EC50 values from 1.547 × 10-5 mol L-1 to 1.227 × 10-5 mol L-1 according to the DPPH free radical scavenging test. The rutin-β-CD interaction energies were calculated in the vacuum and various solvents (e.g., water, ethanol, and dimethylsulfoxide) utilizing an accurate and broadly parametrized self-consistent tight-binding quantum chemical method (GFN2-xTB). The calculation results reveal the influence of solvent on the structural formation of the rutin-β-CD complex. In both the vacuum and aqueous solution, rutin can enter into the small-sized empty cavity of β-CD, albeit through different terminals, resulting in distinct preferential structures. The presence of organic solvents appears to reduce the interaction between rutin and β-CD, with the interaction strength following the order: water > ethanol > dimethyl sulfoxide.
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Affiliation(s)
- Thi Lan Pham
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Thi Thu Ha Nguyen
- Hanoi National University of Education 136 Xuan Thuy, Cau Giay Vietnam
| | - Tuan Anh Nguyen
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Irina Le-Deygen
- Chimical enzymology department, Lomonosov Moscow State University Leninskie gory 11b Moscow Russian Federation
| | - Thi My Hanh Le
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Xuan Minh Vu
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Hai Khoa Le
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Cuong Bui Van
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - T R Usacheva
- Ivanovo State University of Chemistry and Technology Sheremetevsky Avenue 7 153000 Ivanovo Russian Federation
| | - Thanh Tung Mai
- Hanoi University of Science and Technology 1 Dai Co Viet, Bach Khoa, Hai Ba Trung Hanoi Vietnam
| | - Dai Lam Tran
- Institute for Tropical Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
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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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Tegin İ, Hallaç B, Sabancı N, Sadik B, Fidan M, Yabalak E. A broad assessment of Eremurus spectabilis M. Bieb: chemical and elemental composition, total phenolic and antimicrobial activity analysis, and quantum chemical calculations of radical scavenging potential. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024; 34:2124-2139. [PMID: 37199334 DOI: 10.1080/09603123.2023.2214100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 05/11/2023] [Indexed: 05/19/2023]
Abstract
Eremurus spectabilis M. Bieb was extensively investigated experimentally and theoretically, including the antioxidant properties of compounds such as flavonoids, hydroxycinnamic acid derivatives, hydroxybenzoic acid derivatives, and organic acids. Antioxidant activity was investigated using the Density Functional Theory (DFT) method based on three known mechanisms: hydrogen atom transfer (HAT), single electron transfer followed by proton transfer (SET-PT), and sequential proton loss electron transfer (SPLET). Subcritical water extraction (SWE), soxhlet extraction (SE), and solvent extraction (SOE) techniques were applied in the extraction process. Malic acid was the major compound with an extract concentration of 38,532.84 ± 1849.58 µg analyte/kg, total phenolics, and free radical scavenging activity were 10.67 mg gallic acid/mL extract and 73.89% per mg/mL extract, respectively. P, Fe, Na, Mg, K, and Ca were the main elements. The antibacterial activity of E. spectabilis against seven bacteria was evaluated, and it was found to be higher than the commercial antibiotics P10 and AMC30.
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Affiliation(s)
- İbrahim Tegin
- Faculty of Arts and Science, Department of Chemistry, Siirt University, Siirt, Turkey
| | - Bülent Hallaç
- Faculty of Engineering, Department of Food Engineering, Siirt University, Siirt, Turkey
| | - Nazmiye Sabancı
- Faculty of Arts and Science, Department of Chemistry, Siirt University, Siirt, Turkey
| | - Betül Sadik
- Faculty of Arts and Science, Department of Chemistry, Siirt University, Siirt, Turkey
| | - Mehmet Fidan
- Faculty of Arts and Science, Department of Biology, Siirt University, Siirt, Turkey
| | - Erdal Yabalak
- Department of Nanotechnology and Advanced Materials, Mersin University, Mersin, Turkey
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Kariminezhad Z, Rahimi M, Fernandes J, Maltais R, Sancéau JY, Poirier D, Fahmi H, Benderdour M. Development of New Resolvin D1 Analogues for Osteoarthritis Therapy: Acellular and Computational Approaches to Study Their Antioxidant Activities. Antioxidants (Basel) 2024; 13:386. [PMID: 38671833 PMCID: PMC11047542 DOI: 10.3390/antiox13040386] [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: 02/20/2024] [Revised: 03/07/2024] [Accepted: 03/15/2024] [Indexed: 04/28/2024] Open
Abstract
In osteoarthritis (OA), oxidative stress plays a crucial role in maintaining and sustaining cartilage degradation. Current OA management requires a combination of pharmaceutical and non-pharmacological strategies, including intraarticular injections of hyaluronic acid (HA). However, several lines of evidence reported that HA oxidation by reactive oxygen species (ROS) is linked with HA cleavage and fragmentation, resulting in reduced HA viscosity. Resolvin D1 (RvD1) is a lipid mediator that is biosynthesized from omega-3 polyunsaturated fatty acids and is a good candidate with the potential to regulate a panoply of biological processes, including tissue repair, inflammation, oxidative stress, and cell death in OA. Herein, newly designed and synthesized imidazole-derived RvD1 analogues were introduced to compare their potential antioxidant properties with commercially available RvD1. Their antioxidant capacities were investigated by several in vitro chemical assays including oxygen radical absorbance capacity, 2,2-diphenyl-1-picrylhydrazyl radical scavenging, ferric ion reducing antioxidant power, hydroxyl radical scavenging, and HA fragmentation assay. All results proved that imidazole-derived RvD1 analogues showed excellent antioxidant performance compared to RvD1 due to their structural modifications. Interestingly, they scavenged the formed reactive oxygen species (ROS) and protected HA from degradation, as verified by agarose gel electrophoresis and gel permission chromatography. A computational study using Gaussian 09 with DFT calculations and a B3LYP/6-31 G (d, p) basis set was also employed to study the relationship between the antioxidant properties and chemical structures as well as calculation of the molecular structures, frontier orbital energy, molecular electrostatic potential, and bond length. The results showed that the antioxidant activity of our analogues was higher than that of RvD1. In conclusion, the findings suggest that imidazole-derived RvD1 analogues can be good candidates as antioxidant molecules for the treatment of oxidative stress-related diseases like OA. Therefore, they can prolong the longevity of HA in the knee and thus may improve the mobility of the articulation.
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Affiliation(s)
- Zahra Kariminezhad
- Orthopedic Research Laboratory, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, Montréal, QC H4J 1C5, Canada; (Z.K.); (M.R.); (J.F.)
| | - Mahdi Rahimi
- Orthopedic Research Laboratory, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, Montréal, QC H4J 1C5, Canada; (Z.K.); (M.R.); (J.F.)
| | - Julio Fernandes
- Orthopedic Research Laboratory, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, Montréal, QC H4J 1C5, Canada; (Z.K.); (M.R.); (J.F.)
| | - René Maltais
- Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC G1V 0A6, Canada; (R.M.); (J.-Y.S.); (D.P.)
| | - Jean-Yves Sancéau
- Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC G1V 0A6, Canada; (R.M.); (J.-Y.S.); (D.P.)
| | - Donald Poirier
- Department of Molecular Medicine, Faculty of Medicine, Université Laval, Québec, QC G1V 0A6, Canada; (R.M.); (J.-Y.S.); (D.P.)
- Organic Synthesis Service, Medicinal Chemistry Platform, CHU de Québec Research Center, Université Laval, Québec, QC G1V 4G2, Canada
| | - Hassan Fahmi
- Osteoarthritis Research Unit, University of Montreal Hospital Research Center (CRCHUM), Montréal, QC H2X 0A9, Canada;
| | - Mohamed Benderdour
- Orthopedic Research Laboratory, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, Montréal, QC H4J 1C5, Canada; (Z.K.); (M.R.); (J.F.)
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9
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Abdul Sattar M, Patnaik A. Molecular Insights into Antioxidant Efficiency of Melanin: A Sustainable Antioxidant for Natural Rubber Formulations. J Phys Chem B 2023; 127:8242-8256. [PMID: 37708379 DOI: 10.1021/acs.jpcb.3c03523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
N-(1,3-Dimethyl butyl)-N'-phenyl-p-phenylenediamine (6-PPD) is a worldwide antioxidant commonly added to delay the thermo-oxidative degradation of tire rubbers. Unfortunately, 6PPD and its transformation product 6PPD-quinone are toxic to aquatic organisms (e.g., coho salmon). Herein, we explore the free radical scavenging activity and protective mechanism of melanin (MLN) on natural rubber's (NR's) oxidative resistance using molecular dynamics (MD) and quantum mechanical (QM) calculations. The relationship between the molecular structure and the chemical nature of the antioxidant molecules via transition state calculations is explored to unravel the reaction mechanisms of antioxidants interacting with peroxy radicals (ROO·) of NR with the estimation of reaction barriers. Following this, the radical scavenging activity of antioxidants was quantified via a hydrogen atom transfer mechanism and bond dissociation energy calculations. Parallel MD simulations were considered to study the interfacial interactions of antioxidant molecules with polymer chains and fillers with a quantifiable structure-property correlation. Given these results, the nanocomposite (NR-MLN-SiO2) with natural antioxidant melanin manifested outstanding antioxidant properties by preferentially bagging the ROO· radicals, thus improving NR's thermal-oxidative aging relative to 6-PPD. The MD results revealed that the intermolecular interactions at the NR/antioxidant interface benefited the antioxidant MLN to bind tightly to the NR in NR-MLN-SiO2 composite, thus exhibiting improved dispersion, O2 barrier properties, and thermo-oxidative stability, which could extend the service life of NR products (e.g., tires). In addition, as a sustainable antioxidant, MLN could replace toxic antioxidants like 6-PPD. More importantly, the QM/MD simulations provided a fundamental understanding of the mechanistic pathways of antioxidant molecules in NR composites, which are conducive to designing high-performance and sustainable green elastomers.
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Affiliation(s)
- Mohammad Abdul Sattar
- Colloid and Interface Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Madras, Chennai600036, India
| | - Archita Patnaik
- Colloid and Interface Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Madras, Chennai600036, India
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Tzankova D, Kuteva H, Mateev E, Stefanova D, Dzhemadan A, Yordanov Y, Mateeva A, Tzankova V, Kondeva-Burdina M, Zlatkov A, Georgieva M. Synthesis, DFT Study, and In Vitro Evaluation of Antioxidant Properties and Cytotoxic and Cytoprotective Effects of New Hydrazones on SH-SY5Y Neuroblastoma Cell Lines. Pharmaceuticals (Basel) 2023; 16:1198. [PMID: 37765006 PMCID: PMC10537553 DOI: 10.3390/ph16091198] [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: 07/29/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/29/2023] Open
Abstract
A series of ten new hydrazide-hydrazone derivatives bearing a pyrrole ring were synthesized and structurally elucidated through appropriate spectral characteristics. The target hydrazones were assessed for radical scavenging activity through 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) tests, with ethyl 5-(4-bromophenyl)-1-(2-(2-(4-hydroxy-3,5-dimethoxybenzylidene)hydrazine-yl)-2-oxoethyl)-2-methyl-1H-pyrrole-3-carboxylate (7d) and ethyl 5-(4-bromophenyl)-1-(3-(2-(4-hydroxy-3,5-dimethoxybenzylidene) hydra zine-yl)-3-oxopropyl)-2-methyl-1H-pyrrole-3-carboxylate (8d) highlighted as the best radical scavengers from the series. Additional density functional theory (DFT) studies have indicated that the best radical scavenging ligands in the newly synthesized molecules are stable, do not decompose into elements, are less polarizable, and with a hard nature. The energy of the highest occupied molecular orbital (HOMO) revealed that both compounds possess good electron donation capacities. Overall, 7d and 8d can readily scavenge free radicals in biological systems via the donation of hydrogen atoms and single electron transfer. The performed in vitro assessment of the compound's protective activity on the H2O2-induced oxidative stress model on human neuroblastoma cell line SH-SY5Y determined 7d as the most perspective representative with the lowest cellular toxicity and the highest protection.
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Affiliation(s)
- Diana Tzankova
- Department “Pharmaceutical Chemistry”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (D.T.); (E.M.); (A.M.); (A.Z.)
| | - Hristina Kuteva
- Laboratory “Drug metabolism and Drug Toxicity”, Department “Pharmacology, Pharmacotherapy and Toxicology”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (H.K.); (D.S.); (Y.Y.); (V.T.); (M.K.-B.)
| | - Emilio Mateev
- Department “Pharmaceutical Chemistry”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (D.T.); (E.M.); (A.M.); (A.Z.)
| | - Denitsa Stefanova
- Laboratory “Drug metabolism and Drug Toxicity”, Department “Pharmacology, Pharmacotherapy and Toxicology”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (H.K.); (D.S.); (Y.Y.); (V.T.); (M.K.-B.)
| | - Alime Dzhemadan
- Laboratory “Drug metabolism and Drug Toxicity”, Department “Pharmacology, Pharmacotherapy and Toxicology”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (H.K.); (D.S.); (Y.Y.); (V.T.); (M.K.-B.)
| | - Yordan Yordanov
- Laboratory “Drug metabolism and Drug Toxicity”, Department “Pharmacology, Pharmacotherapy and Toxicology”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (H.K.); (D.S.); (Y.Y.); (V.T.); (M.K.-B.)
| | - Alexandrina Mateeva
- Department “Pharmaceutical Chemistry”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (D.T.); (E.M.); (A.M.); (A.Z.)
| | - Virginia Tzankova
- Laboratory “Drug metabolism and Drug Toxicity”, Department “Pharmacology, Pharmacotherapy and Toxicology”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (H.K.); (D.S.); (Y.Y.); (V.T.); (M.K.-B.)
| | - Magdalena Kondeva-Burdina
- Laboratory “Drug metabolism and Drug Toxicity”, Department “Pharmacology, Pharmacotherapy and Toxicology”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (H.K.); (D.S.); (Y.Y.); (V.T.); (M.K.-B.)
| | - Alexander Zlatkov
- Department “Pharmaceutical Chemistry”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (D.T.); (E.M.); (A.M.); (A.Z.)
| | - Maya Georgieva
- Department “Pharmaceutical Chemistry”, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria; (D.T.); (E.M.); (A.M.); (A.Z.)
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11
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Borges RS, Aguiar CPO, Oliveira NLL, Amaral INA, Vale JKL, Chaves Neto AMJ, Queiroz AN, da Silva ABF. Antioxidant capacity of simplified oxygen heterocycles and proposed derivatives by theoretical calculations. J Mol Model 2023; 29:232. [PMID: 37407749 DOI: 10.1007/s00894-023-05602-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 05/22/2023] [Indexed: 07/07/2023]
Abstract
CONTEXT Some structural properties can be involved in the antioxidant capacity of several polyphenol derivatives, among them their simplified structures. This study examines the contribution of simplified structure for the antioxidant capacity of some natural and synthetic antioxidants. The resonance structures were related to the π-type electron system of carbon-carbon double bonds between both phenyl rings. Trans-resveratrol, phenyl-benzofuran, phenyl-indenone, and benzylidene-benzofuranone are the best basic antioxidant templates among the simplified derivatives studied here. Additionally, the stilbene moiety was found on the molecules with the best antioxidant capacity. Furthermore, our investigation suggests that these compounds can be used as antioxidant scaffold for designing and developing of new promising derivatives. METHODS To investigate the structure-antioxidant capacity for sixteen simplified natural and proposed derivatives we have employed density functional theory and used Gaussian 09. Our DFT calculations were performed using the B3LYP functional and the 6-31+G(d,p) basis set. All electron transfer mechanisms were investigated by using values of HOMO, ionization potential, energy affinity, stabilization energies, and spin density distributions.
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Affiliation(s)
- Rosivaldo S Borges
- Núcleo de Estudos e Seleção de Compostos Bioativos, Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil.
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, São Carlos, SP, 13560-970, Brazil.
| | - Christiane P O Aguiar
- Núcleo de Estudos e Seleção de Compostos Bioativos, Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Nicole L L Oliveira
- Núcleo de Estudos e Seleção de Compostos Bioativos, Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Israel N A Amaral
- Núcleo de Estudos e Seleção de Compostos Bioativos, Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Joyce K L Vale
- Núcleo de Estudos e Seleção de Compostos Bioativos, Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Antonio M J Chaves Neto
- Faculdade de Física, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Auriekson N Queiroz
- Núcleo de Estudos e Seleção de Compostos Bioativos, Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Albérico B F da Silva
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, São Carlos, SP, 13560-970, Brazil
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12
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Qi Y, Wang Z, Zhang J, Tang S, Zhu H, Jiang B, Li X, Wang J, Sun Z, Zhao M, Zhu H, Yan P. Anti-Neuroinflammatory Meroterpenoids from a Chinese Collection of the Brown Alga Sargassum siliquastrum. JOURNAL OF NATURAL PRODUCTS 2023; 86:1284-1293. [PMID: 37137291 DOI: 10.1021/acs.jnatprod.3c00087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Nine new chromane-type meroterpenoids, including the rare nor-meroterpenoid sargasilol A (1) and the eight meroditerpenoids sargasilols B-I (2-9), were isolated from a China Sea collection of the brown alga Sargassum siliquastrum, together with six known analogues (10-15). The structures of the new chromanes were identified by extensive spectroscopic analysis and by comparison with previously reported data. Compounds 1-3 and 6-15 exhibited inhibition against LPS-induced NO production in BV-2 microglial cells, and 1, with a shorter carbon chain, was the most active one. Compound 1 was established as an anti-neuroinflammatory agent through targeting the IKK/IκB/NF-κB signaling pathway. As such, the chromanes from brown algae could provide promising anti-neuroinflammatory lead compounds for further structural modification.
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Affiliation(s)
- Yu Qi
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Zhongle Wang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Jingwen Zhang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Shuhua Tang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Haoyun Zhu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Bing Jiang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Xinhua Li
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Jiabao Wang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Zhongmin Sun
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, People's Republic of China
| | - Min Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Haoru Zhu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
| | - Pengcheng Yan
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, People's Republic of China
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13
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Leyla C, Fatiha M, Leila N, Rabah O. Solubility and Antioxidant Activity of 1,2-Dihydro-2-Methyl-2-Phenyl-3H-Indole-3-One-1-Oxyl Hosted at Randomly Methylated-Βétacyclodextrin: A Computational Investigation. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2022.2146148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Affiliation(s)
- Chekatti Leyla
- Department of Material Sciences, Faculty of Mathematical, Informatics and Material Sciences, Laboratory of Computational Chemistry and Nanostructures, University of 8 Mai 1945, Guelma, Algeria
- Department of Material Sciences, Faculty of Mathematical, Informatics and Material Sciences, Laboratory of Industrial Analysis and Materials Engineering, University of 8 Mai 1945, Guelma, Algeria
| | - Madi Fatiha
- Department of Material Sciences, Faculty of Mathematical, Informatics and Material Sciences, Laboratory of Computational Chemistry and Nanostructures, University of 8 Mai 1945, Guelma, Algeria
| | - Nouar Leila
- Department of Material Sciences, Faculty of Mathematical, Informatics and Material Sciences, Laboratory of Computational Chemistry and Nanostructures, University of 8 Mai 1945, Guelma, Algeria
| | - Oumeddour Rabah
- Department of Material Sciences, Faculty of Mathematical, Informatics and Material Sciences, Laboratory of Industrial Analysis and Materials Engineering, University of 8 Mai 1945, Guelma, Algeria
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14
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Xie W, Wiriyarattanakul S, Rungrotmongkol T, Shi L, Wiriyarattanakul A, Maitarad P. Rational Design of a Low-Data Regime of Pyrrole Antioxidants for Radical Scavenging Activities Using Quantum Chemical Descriptors and QSAR with the GA-MLR and ANN Concepts. Molecules 2023; 28:molecules28041596. [PMID: 36838583 PMCID: PMC9959680 DOI: 10.3390/molecules28041596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 02/11/2023] Open
Abstract
A series of pyrrole derivatives and their antioxidant scavenging activities toward the superoxide anion (O2•-), hydroxyl radical (•OH), and 1,1-diphenyl-2-picryl-hydrazyl (DPPH•) served as the training data sets of a quantitative structure-activity relationship (QSAR) study. The steric and electronic descriptors obtained from quantum chemical calculations were related to the three O2•-, •OH, and DPPH• scavenging activities using the genetic algorithm combined with multiple linear regression (GA-MLR) and artificial neural networks (ANNs). The GA-MLR models resulted in good statistical values; the coefficient of determination (R2) of the training set was greater than 0.8, and the root mean square error (RMSE) of the test set was in the range of 0.3 to 0.6. The main molecular descriptors that play an important role in the three types of antioxidant activities are the bond length, HOMO energy, polarizability, and AlogP. In the QSAR-ANN models, a good R2 value above 0.9 was obtained, and the RMSE of the test set falls in a similar range to that of the GA-MLR models. Therefore, both the QSAR GA-MLR and QSAR-ANN models were used to predict the newly designed pyrrole derivatives, which were developed based on their starting reagents in the synthetic process.
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Affiliation(s)
- Wanting Xie
- Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Sopon Wiriyarattanakul
- Program in Computer Science, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit 53000, Thailand
| | - Thanyada Rungrotmongkol
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Chulalongkorn University, Bangkok 10330, Thailand
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
| | - Liyi Shi
- Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
- Emerging Industries Institute, Shanghai University, Jiaxing 314006, China
| | - Amphawan Wiriyarattanakul
- Program in Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit 53000, Thailand
- Correspondence: (A.W.); (P.M.)
| | - Phornphimon Maitarad
- Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
- Correspondence: (A.W.); (P.M.)
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15
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Molaei S, Dadkhah Tehrani A, Shamlouei H. Antioxidant Activates of New Carbohydrate Based Gallate Derivatives: A DFT Study. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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16
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Fernando IPS, Fernando PWP, Kim T, Ahn G. Structural diversity, biosynthesis, and health-promoting properties of brown algal meroditerpenoids. Crit Rev Biotechnol 2022; 42:1238-1259. [PMID: 34875939 DOI: 10.1080/07388551.2021.2001639] [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: 03/29/2021] [Revised: 08/09/2021] [Accepted: 09/08/2021] [Indexed: 10/19/2022]
Abstract
Marine algae that constitute hundreds of millions of tons of biomass are the oldest representatives of the plant kingdom. Recently, there has been growing interest in the utilization of algae as sustainable feedstocks for natural products with an economic value. Among these natural products are the meroditerpenoids, which are renowned for their protective effects against oxidative stress, inflammation, cancer, obesity, diabetes, and neurodegenerative disorders. Meroditerpenoids have a mixed biosynthetic origin and display a wide range of structural diversity. Their basic structure consists of a ring system bearing a diterpenoid side chain. Structural variations are observed in terms of the functional groups and saturation/cyclization of the diterpenoid side chain. This review classifies algal meroditerpenoids as plastoquinones, chromanols, chromenes, chromones, cyclic meroditerpenoids, nahocols, and isonahocols and examines their potential applications in functional foods and biopharmacology. Their lipid solubility, low molecular weight, and propensity to cross the blood-brain barrier places meroditerpenoids as potential drug candidates. There is growing interest in the study of algal meroterpenoids, and recent research has reported the structure of several new meroterpenoids and their biological activities. Further research is needed to extend the use of algal meroditerpenoids in preclinical trials. Understanding the mechanism of their biosynthesis will allow the development of de novo biosynthesis and biomimetic synthesis strategies for the industrial-scale production of meroditerpenoids and their synthetic derivatives to aid pharmaceutical research. This review is the first to summarize up-to-date information on all brown algae-derived meroditerpenoids.
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Affiliation(s)
| | | | - Taeho Kim
- Division of Marine Technology, Chonnam National University, Yeosu, South Korea
| | - Ginnae Ahn
- Department of Marine Bio-Food Sciences, Chonnam National University, Yeosu, South Korea
- Department of Food Technology and Nutrition, Chonnam National University, Yeosu, South Korea
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Deviani V, Hardianto A, Farabi K, Herlina T. Flavanones from Erythrina crista-galli Twigs and Their Antioxidant Properties Determined through In Silico and In Vitro Studies. Molecules 2022; 27:molecules27186018. [PMID: 36144753 PMCID: PMC9501950 DOI: 10.3390/molecules27186018] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/09/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Flavonoids are a secondary metabolite group with various bioactivities, such as antioxidants. They are rich in the genus Erythrina, such as Erythrina crista-galli. This research aims to isolate and characterize flavonoids from the twigs of E. crista-galli and determine their antioxidant properties through in silico and in vitro assays. The ethyl acetate extract of E. crista-galli twigs were separated by column chromatography and characterized using spectroscopic methods. Density functional theory (DFT) calculations were performed on the isolated flavonoids and the reference compounds (ascorbic acid and quercetin) to obtain global descriptive parameters and a donor–acceptor map (DAM). We successfully isolated lupinifolin (1) and citflavanone (2) for the first time from E. crista-galli, along with lonchocarpol A (3), which has been discovered previously. The DAM suggests that these flavanones are good antiradicals with effective electron donors. However, they tend to be electron acceptors in methanol. The frontier molecular orbital analysis implies that lupinifolin (1) is a better antiradical than the other flavanones. The DPPH assays show that lupinifolin (1) has the highest antioxidant (antiradical) activity, with an IC50 value of 128.64 ppm. The in silico studies showed similar trends to the in vitro assays using the DPPH method.
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18
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Raut DG, Bhosale RB, Lawand AS, Hublikar MG, Kadu VD, Patil SB. A Novel Method for the Syntheses of Imidazo-Thiadiazoles as Potential Antioxidants and Anti-Inflammatory Agents. RECENT ADVANCES IN INFLAMMATION & ALLERGY DRUG DISCOVERY 2022; 16:19-25. [PMID: 35410625 DOI: 10.2174/2772270816666220410130059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND A literature survey revealed that many imidazo-thiadiazole molecules were used as key intermediates for the development of novel drugs. The synthesized imidazo-thiadiazole derivatives were tested for their in vitro antioxidant and anti-inflammatory properties. The purpose of this research paper is to provide readers with information regarding diseases caused by free radicals. OBJECTIVE The objective of this study is to develop novel antioxidant and anti-inflammatory drugs. METHODS Imidazo-thiadiazole derivatives 5a-f were synthesized through cyclo-condensation reactions in two steps. First, the synthesis of 2-amino-thiadiazole derivatives from substituted aromatic carboxylic acids and thiosemicarbazide by using POCl3 as a solvent as well as a catalyst was performed. In the next step, imidazo-thiadiazoles were prepared from 2-amino-thiadiazole derivatives with appropriate α-haloketones in the presence of polyethylene glycol-300 (PEG-300) as a green solvent. These imidazo- thiadiazole derivatives were prepared by using a novel method. The synthesized compounds were in vitro tested for their antioxidant and anti-inflammatory activities. RESULTS In vitro evaluation report showed that nearly all molecules possess potential antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH), nitric oxide (NO), superoxide radical (SOR), and hydrogen peroxide (H2O2) radical scavenging activity. Most of the imidazo-thiadiazole derivatives have shown significant anti-inflammatory activity as compared to diclofenac sodium as a reference standard. CONCLUSION In the search for novel therapies to treat inflammation and oxidation, we have made efforts to develop anti-inflammatory and antioxidant agents with a preeminent activity. Imidazo-thiadiazoles 5a, 5e as well as 5f showed potential anti-inflammatory activity. All tested imidazo-thiadiazole deriv-atives (5a-f) showed potential antioxidant activity against one more radical scavenging species as com-pared to ascorbic acid as the reference standard. Thus, imidazo-thiadiazole derivatives constitute an interesting template for the design and development of new antioxidant as well as anti-inflammatory agents.
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Affiliation(s)
- Dattatraya G Raut
- Organic Chemistry Research Laboratory, School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur-413255 Maharashtra, India
| | - Raghunath B Bhosale
- Organic Chemistry Research Laboratory, School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur-413255 Maharashtra, India
| | - Anjana S Lawand
- Organic Chemistry Research Laboratory, School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur-413255 Maharashtra, India
| | - Mahesh G Hublikar
- Organic Chemistry Research Laboratory, School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur-413255 Maharashtra, India
| | - Vikas D Kadu
- Organic Chemistry Research Laboratory, School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur-413255 Maharashtra, India
| | - Sandeep B Patil
- Department of Pharmacology, Dr. Shivajirao Kadam College of Pharmacy Kasbe Digraj, Sangli, Maharashtra, India
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Antioxidant and cytotoxic activities of selected salicylidene imines: experimental and computational study. Mol Divers 2022; 26:3115-3128. [PMID: 35147861 DOI: 10.1007/s11030-021-10370-9] [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: 06/21/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
Abstract
Selected salicylidene imines were evaluated for their antioxidant and cytotoxic potentials. Several of them exerted potent scavenging capacity towards ABTS radical and hydrogen peroxide. The insight into the preferable antioxidative mechanism was reached employing density functional theory. In the absence of free radicals, the SPLET mechanism is dominant in polar surroundings, while HAT is prevailing in a non-polar environment. The results obtained for the reactions of the most active compounds with some medically relevant radicals pointed out competition between HAT and SPLET mechanisms. The assessment of their cytotoxic properties revealed inhibition of ER-a human breast adenocarcinoma cells or estrogen-independent prostate cancer cells. Molecular docking study with the cyclooxygenase (COX) 2 enzyme was performed to examine the most probable bioactive conformations and possible interactions between the tested derivatives and COX-2 binding pocket.
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Biological Evaluation of 4-(1H-triazol-1-yl)benzoic Acid Hybrids as Antioxidant Agents: In Vitro Screening and DFT Study. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112411642] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fourteen triazole benzoic acid hybrids were previously characterized. This work aimed to screen their in vitro antioxidant activity using different assays, i.e., DPPH (1,1-diphenyl-1-picrylhydrazyl), reducing the power capability, FRAP (ferric reducing antioxidants power) and ABTS (2,2′-azino-bis(3-ethylben zothiazoline-6-sulfonate) radical scavenging. The 14 compounds showed antioxidant properties in relation to standard BHA (butylated hydroxylanisole) and Trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid). Higher antioxidant activity was observed by the parent (1) at a concentration of 100 µg/mL (89.95 ± 0.34 and 88.59 ± 0.13%) when tested by DPPH and ABTS methods in relation to BHA at 100 µg/mL (95.02 ± 0.74 and 96.18 ± 0.33%). The parent (2) demonstrated remarkable scavenging activity when tested by ABTS (62.00 ± 0.24%), however, 3 was less active (29.98 ± 0.13%). Compounds 5, 6, 9, and 11 exhibited good scavenging activity compared to 1. DFT studies were performed using the B3LYP/6-311++g (2d,2p) level of theory to evaluate different antioxidant descriptors for the targets. Three antioxidant mechanisms, i.e., hydrogen atom transfer (HAT), sequential electron transfer proton transfer (SETPT) and sequential proton loss electron transfer (SPLET) were suggested to describe the antioxidant properties of 1–14. Out of the 14 triazole benzoic acid hybrids, 5, 9, 6, and 11 showed some good theoretical results, which were in agreement with some experimental outcomes. Based on the computed (PA and ETE) and (BDE and IP) values in (SPLET) and (HAT and SETPT) mechanisms, respectively, compound 9 emerged has having good antioxidant activity.
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Shang Y, Li X, Sun TY, Zhou J, Zhou H, Chen K. Comparative theoretical researches on the anti-oxidant activity of δ-viniferin and ε-viniferin. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abuelizz H, Taie HAA, Bakheit AH, Mostafa GAE, Marzouk M, Rashid H, Al-Salahi R. Investigation of 4-Hydrazinobenzoic Acid Derivatives for Their Antioxidant Activity: In Vitro Screening and DFT Study. ACS OMEGA 2021; 6:31993-32004. [PMID: 34870022 PMCID: PMC8638017 DOI: 10.1021/acsomega.1c04772] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/08/2021] [Indexed: 05/06/2023]
Abstract
Hydrazinobenzoic acid derivatives with isothiocyanate, benzylidene, and acid anhydride core units (1-13) were previously synthesized and fully characterized. Targets 1-13 were investigated for their antioxidant activities using different in vitro assays such as 1,1-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS), ferric reducing antioxidant power (FRAP), and reducing power capability. All derivatives showed antioxidant properties in relation to the standard butylated hydroxylanisole (BHA). Superior antioxidant activities was observed for compounds 3 and 5-9 at a concentration of 20 μg/mL (70-72%) when tested by the DPPH method in comparison to BHA (92%), and compounds 1-10 showed the highest free radical quenching activity (80-85%) when examined by ABTS at 20 μg/mL in relation to BHA (85%). Density function theory (DFT) studies were carried out using the B3LYP/6-311G(d,p) level of theory. Several antioxidant descriptors were calculated for targets 1-13 compared with BHA. Targets 1-13 were proposed to exhibit their antioxidant activities via the following three proposed antioxidant mechanisms: single electron transfer (SET), hydrogen atom transfer (HAT), and sequential proton loss electron transfer (SPLET). The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies and electron levels for 1-13 were also determined.
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Affiliation(s)
- Hatem
A. Abuelizz
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Hanan A. A. Taie
- Department
of Plant Biochemistry, Agriculture and Biological Research Institute, National Research Centre, 33 El-Bohouth St. (Former El-Tahrir St.), Dokki, Cairo 12622, Egypt
| | - Ahmed H. Bakheit
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Gamal A. E. Mostafa
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohamed Marzouk
- Chemistry
of Tanning Materials and Leather Technology Department, Chemical Industries
Research Institute, National Research Centre, 33 El-Bohouth St. (Former El-Tahrir
St.), Dokki, Cairo 12622, Egypt
| | - Harunor Rashid
- National
Centre for Immunisation Research and Surveillance (NCIRS), Kids Research
at The Children’s Hospital, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Rashad Al-Salahi
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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