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Pezzotti G, Fujita Y, Boschetto F, Zhu W, Marin E, Vandelle E, McEntire BJ, Bal SB, Giarola M, Makimura K, Polverari A. Activity and Mechanism of Action of the Bioceramic Silicon Nitride as an Environmentally Friendly Alternative for the Control of the Grapevine Downy Mildew Pathogen Plasmopara viticola. Front Microbiol 2020; 11:610211. [PMID: 33381101 PMCID: PMC7767917 DOI: 10.3389/fmicb.2020.610211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 11/11/2020] [Indexed: 02/03/2023] Open
Abstract
Downy mildew of grapevine, caused by Plasmopara viticola (Berk. and Curt.) Berl. and de Toni, is one of the most devastating diseases of grapevine, severely affecting grape and wine production and quality worldwide. Infections are usually controlled by the intensive application of synthetic fungicides or by copper-based products in organic farming, rising problems for soil contamination and adverse impacts on environment and human health. While strict regulations attempt to minimize their harmful consequences, the situation calls for the development of alternative fungicidal strategies. This study presents the unprecedented case of a bioceramic, silicon nitride, with antimicrobial properties against P. viticola, but without adverse effects on human cells and environment, opening the way to the possible extension of silicon nitride applications in agriculture. Raman spectroscopic assessments of treated sporangia in conjunction with microscopic observations mechanistically showed that the nitrogen-chemistry of the bioceramic surface affects pathogen's biochemical components and cell viability, thus presenting a high potential for host protection from P. viticola infections.
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Affiliation(s)
- Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Orthopedic Surgery, Tokyo Medical University, Tokyo, Japan
- The Center for Advanced Medical Engineering and Informatics, Osaka University, Osaka, Japan
| | - Yuki Fujita
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
| | - Francesco Boschetto
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Wenliang Zhu
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
| | - Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Elodie Vandelle
- Laboratory of Phytopathology, Department of Biotechnology, University of Verona, Verona, Italy
| | | | - Sonny B. Bal
- SINTX Technologies Corporation, Salt Lake City, UT, United States
| | - Marco Giarola
- Raman Laboratory, Centro Piattaforme Tecnologiche, University of Verona, Verona, Italy
| | - Koichi Makimura
- Medical Mycology, Graduate School of Medicine, Teikyo University, Tokyo, Japan
| | - Annalisa Polverari
- Laboratory of Phytopathology, Department of Biotechnology, University of Verona, Verona, Italy
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Thuy PT, Van Trang N, Son NT. Antioxidation of 2-phenylbenzofuran derivatives: structural-electronic effects and mechanisms. RSC Adv 2020; 10:6315-6332. [PMID: 35496026 PMCID: PMC9049690 DOI: 10.1039/c9ra10835a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/06/2020] [Indexed: 01/20/2023] Open
Abstract
Stilbenoid-type 2-phenylbenzofuran derivatives, which are widely distributed in nature, are now promising antioxidant agents. In the present study, a quantum computational approach principally based on the DFT/B3LYP method with the 6-311++G(d,p) basis set was used to shed light on free radical scavenging for the isolated compounds stemofurans A-K and S-W. On the basis of the findings and from a thermodynamic perspective, the antioxidant activity of all studied compounds in the gaseous phase was mostly controlled by the O-H bond dissociation enthalpy (BDE), consistent with the hydrogen atom transfer (HAT) mechanism. The solvent effect was investigated, and the hydroxyl radicals of these studied compounds possessed the lowest proton affinity (PA) enthalpy and the sequential proton loss electron transfer (SPLET) pathway occurred in water, methanol and acetone. The studied compounds interacted with DPPH radicals, which is kinetic evidence of the involvement of two intermediates and one transition state. From both thermodynamics and kinetics perspectives, it can be proposed that stemofuran U is likely to be a leader compound in antioxidant drug development due to the presence of a 4'-OH moiety. Regarding the structure-bioactivity relationship, methylation can lead to a decrease in BDE.
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Affiliation(s)
- Phan Thi Thuy
- School of Natural Sciences Education, Vinh University Vietnam
| | - Nguyen Van Trang
- Institute for Tropical Technology, Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Caugiay Hanoi Vietnam +84-985-538-722
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Caugiay Hanoi Vietnam
| | - Ninh The Son
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Caugiay Hanoi Vietnam +84-968-929-304
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Rahman TU, Aurang Zeb M, Pu DB, Liaqat W, Ayub K, Xiao WL, Mahmood T, Sajid M, Hussain R. Density functional theory, molecular docking and bioassay studies on ( S)-2-hydroxy-N-(2 S,3 S,4 R, E)-1,3,4 trihydroxyicos-16-en-2-yl)tricosanamide. Heliyon 2019; 5:e02038. [PMID: 31417966 PMCID: PMC6690558 DOI: 10.1016/j.heliyon.2019.e02038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 02/24/2019] [Accepted: 07/01/2019] [Indexed: 11/28/2022] Open
Abstract
A novel indigoferamide-A, earlier isolated from the seeds of Indigofera heterantha Wall was characterized using density functional theory, molecular docking and bioassays studies. Density functional theory calculations were performed at B3LYP/6-31G(d,p) to gain geometric insight of the compound. Conformational analyses have been performed around three important dihedral angles to explore the lowest energy structure and conformer. The simulated vibrational spectrum of the compound at B3LYP/6-31G(d,p) was scaled with two scaling factors, and the scaled harmonic vibrations shows nice correlation with the experimental values. 1H and 13C NMR chemical shifts were calculated using Cramer's re-parameterized function W04 at 6- 31G(d,p) basis set. Several conformers lying within 2 kcal mol-1 of the minimum energy conformer were considered; however, the chemical shifts were not significantly different among these conformers. The Gaussian averaged theoretical 1H and 13C chemical shifts correlate nicely with the experimental data. Electronic properties such as band gap, ionization potential and electron affinities were also simulated for the first time, however, no comparison could be made with the experiment. The compound was also screened for urease, antiglycation activities and the theoretical explanation of the results is provided based on molecular docking simulations.
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Affiliation(s)
- Taj Ur Rahman
- Department of Chemistry, Mohi-Ud-Din Islamic University AJ&K, Pakistan
| | - Muhammad Aurang Zeb
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, PR China
| | - De-Bing Pu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, PR China
| | - Wajiha Liaqat
- Institute of Chemical Sciences, University of Peshwar, 25120, Pakistan
| | - Khurshid Ayub
- COMSATS Institute of Information Technology, University Road, Tobe Camp, Abbottabad, KPK, 22060, Pakistan
| | - Wei-Lie Xiao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, PR China
| | - Tariq Mahmood
- COMSATS Institute of Information Technology, University Road, Tobe Camp, Abbottabad, KPK, 22060, Pakistan
| | - Muhammad Sajid
- Department of Biochemistry, Hazara University, Mansehra, KPK, Pakistan
| | - Riaz Hussain
- Department of Chemistry, University of Education, Okara Campus, Okara, Punjab, Pakistan
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Karakaya M, Ucun F. A theoretical study on tautomeric structures of 4′-nitroazobenzene-2,4-diol and 4-methyl-4′-nitroazobenzene-2,6-diol compounds. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2014. [DOI: 10.1134/s003602441407022x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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