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Xu N, Ijaz M, Shu Y, Wang P, Ma L, Wang P, Ding H, Shahbaz M, Shi H. The in vivo study on antioxidant activity of wendan decoction in treating hyperlipidemia: a pharmacokinetic-pharmacodynamic (PK-PD) model. Front Pharmacol 2024; 15:1260603. [PMID: 38323083 PMCID: PMC10844532 DOI: 10.3389/fphar.2024.1260603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 01/08/2024] [Indexed: 02/08/2024] Open
Abstract
Background: Wendan Decoction (WDD) is a six-herb Chinese medicine recipe that was first mentioned in about 652 AD. It is frequently used to treat hyperlipidemic patients' clinical complaints. According to reports, oxidative stress has a significant role in hyperlipidemia. Purpose: There has not yet been a thorough pharmacokinetic-pharmacodynamic (PK-PD) examination of the clinical efficacy of WDD in the context of hyperlipemia-related oxidative stress. Therefore, the goal of this research is to explore the antioxidant essence of WDD by developing a PK-PD model, ordering to assure its implication in treating hyperlipidemia in medical practice. Methods: The model rats of foodborne hyperlipidemia were established by feeding with high-fat feed, and the lipid-lowering effect of WDD was explored. The plasma drug concentration of rats at different doses were measured by UPL-MS/MS technology, and PK parameters were calculated using Phoenix WinNonlin 8.1 software. The level of lipid peroxide (LPO) in plasma at different time points was measured by enzyme labeling instrument. Finally, the PK-PD model was established by using Phoenix WinNonlin 8.1 software, to explore the lipid-lowering effect of WDD and the relation between the dynamic changes of chemical components and antioxidant effect. Results: The findings suggested that, WDD can reduce the levels of triglyceride (TG), total cholesterol (TC), and low-density lipoprotein cholesterol (LDL-C) in plasma, and high-density lipoprotein cholesterol (HDL-C) was related to the dosage. Between the peak drug levels and the WDD's maximal therapeutic response, there existed a hysteresis. WDD's effect-concentration curves displayed a counterclockwise delaying loop. Alternatively, among the ten components of WDD, hesperetin, quercetin, naringenin and tangeretin might exert more significant effects in regulating the LPO levels in hyperlipidemic rats. Conclusion: This study can be helpful for other investigators to study the lipid-lowering effect of WDD.
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Affiliation(s)
- Nan Xu
- Laboratory of Chinese Medicine Preparation, Shandong Research Academy of Traditional Chinese Medicine, Jinan, China
- The Faculty of Medicine, Qilu Institute of Technology, Jinan, China
| | - Muhammad Ijaz
- The Faculty of Medicine, Qilu Institute of Technology, Jinan, China
- Department of Pharmacology, School of Pharmaceutical Science, Shandong University, Jinan, China
| | - Yishuo Shu
- Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Jinan, China
| | - Peng Wang
- Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Jinan, China
| | - Lei Ma
- Laboratory of Chinese Medicine Preparation, Shandong Research Academy of Traditional Chinese Medicine, Jinan, China
| | - Ping Wang
- Laboratory of Chinese Medicine Preparation, Shandong Research Academy of Traditional Chinese Medicine, Jinan, China
| | - Hailing Ding
- The Faculty of Medicine, Qilu Institute of Technology, Jinan, China
| | - Muhammad Shahbaz
- Laboratory of Chinese Medicine Preparation, Shandong Research Academy of Traditional Chinese Medicine, Jinan, China
- Research Center for Sectional and Imaging Anatomy, School of Basic Medical Science, Digital Human Institute, Shandong University, Jinan, Shandong, China
| | - Haiyan Shi
- The Faculty of Medicine, Qilu Institute of Technology, Jinan, China
- Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Jinan, China
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Fragou F, Theofanous A, Deligiannakis Y, Louloudi M. Nanoantioxidant Materials: Nanoengineering Inspired by Nature. MICROMACHINES 2023; 14:383. [PMID: 36838085 PMCID: PMC9963756 DOI: 10.3390/mi14020383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Oxidants are very active compounds that can cause damage to biological systems under specific environmental conditions. One effective way to counterbalance these adverse effects is the use of anti-oxidants. At low concentrations, an antioxidant is defined as a compound that can delay, control, or prevent an oxidative process. Antioxidants exist in plants, soil, and minerals; therefore, nature is a rich source of natural antioxidants, such as tocopherols and polyphenols. In nature, antioxidants perform in tandem with their bio-environment, which may tune their activity and protect them from degradation. In vitro use of antioxidants, i.e., out of their biomatrix, may encounter several drawbacks, such as auto-oxidation and polymerization. Artificial nanoantioxidants can be developed via surface modification of a nanoparticle with an antioxidant that can be either natural or synthetic, directly mimicking a natural antioxidant system. In this direction, state-of-the-art nanotechnology has been extensively incorporated to overcome inherent drawbacks encountered in vitro use of antioxidants, i.e., out of their biomatrix, and facilitate the production and use of antioxidants on a larger scale. Biomimetic nanoengineering has been adopted to optimize bio-medical antioxidant systems to improve stability, control release, enhance targeted administration, and overcome toxicity and biocompatibility issues. Focusing on biotechnological sciences, this review highlights the importance of nanoengineering in developing effective antioxidant structures and comparing the effectiveness of different nanoengineering methods. Additionally, this study gathers and clarifies the different antioxidant mechanisms reported in the literature and provides a clear picture of the existing evaluation methods, which can provide vital insights into bio-medical applications.
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Affiliation(s)
- Fotini Fragou
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
| | - Annita Theofanous
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
| | - Yiannis Deligiannakis
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece
| | - Maria Louloudi
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
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Wu Y, Li X, Zhang J, Zhao H, Tan S, Xu W, Pan J, Yang F, Pi E. ERF subfamily transcription factors and their function in plant responses to abiotic stresses. FRONTIERS IN PLANT SCIENCE 2022; 13:1042084. [PMID: 36531407 PMCID: PMC9748296 DOI: 10.3389/fpls.2022.1042084] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/09/2022] [Indexed: 06/09/2023]
Abstract
Ethylene Responsive Factor (ERF) subfamily comprise the largest number of proteins in the plant AP2/ERF superfamily, and have been most extensively studied on the biological functions. Members of this subfamily have been proven to regulate plant resistances to various abiotic stresses, such as drought, salinity, chilling and some other adversities. Under these stresses, ERFs are usually activated by mitogen-activated protein kinase induced phosphorylation or escape from ubiquitin-ligase enzymes, and then form complex with nucleic proteins before binding to cis-element in promoter regions of stress responsive genes. In this review, we will discuss the phylogenetic relationships among the ERF subfamily proteins, summarize molecular mechanism how the transcriptional activity of ERFs been regulated and how ERFs of different subgroup regulate the transcription of stress responsive genes, such as high-affinity K+ transporter gene PalHKT1;2, reactive oxygen species related genes LcLTP, LcPrx, and LcRP, flavonoids synthesis related genes FtF3H and LhMYBSPLATTER, etc. Though increasing researches demonstrate that ERFs are involved in various abiotic stresses, very few interact proteins and target genes of them have been comprehensively annotated. Hence, future research prospects are described on the mechanisms of how stress signals been transited to ERFs and how ERFs regulate the transcriptional expression of stress responsive genes.
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Gebicki JM, Nauser T. Initiation and Prevention of Biological Damage by Radiation-Generated Protein Radicals. Int J Mol Sci 2021; 23:ijms23010396. [PMID: 35008823 PMCID: PMC8745036 DOI: 10.3390/ijms23010396] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 12/23/2022] Open
Abstract
Ionizing radiations cause chemical damage to proteins. In aerobic aqueous solutions, the damage is commonly mediated by the hydroxyl free radicals generated from water, resulting in formation of protein radicals. Protein damage is especially significant in biological systems, because proteins are the most abundant targets of the radiation-generated radicals, the hydroxyl radical-protein reaction is fast, and the damage usually results in loss of their biological function. Under physiological conditions, proteins are initially oxidized to carbon-centered radicals, which can propagate the damage to other molecules. The most effective endogenous antioxidants, ascorbate, GSH, and urate, are unable to prevent all of the damage under the common condition of oxidative stress. In a promising development, recent work demonstrates the potential of polyphenols, their metabolites, and other aromatic compounds to repair protein radicals by the fast formation of less damaging radical adducts, thus potentially preventing the formation of a cascade of new reactive species.
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Affiliation(s)
- Janusz M. Gebicki
- Department of Biological Sciences, Macquarie University, Sydney 2109, Australia
- Correspondence:
| | - Thomas Nauser
- Departement für Chemie und Angewandte Biowissenschaften, Eidgenössische Technische Hochschule, 8093 Zurich, Switzerland;
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Fast Antioxidant Reaction of Polyphenols and Their Metabolites. Antioxidants (Basel) 2021; 10:antiox10081297. [PMID: 34439545 PMCID: PMC8389220 DOI: 10.3390/antiox10081297] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/01/2021] [Accepted: 08/11/2021] [Indexed: 12/12/2022] Open
Abstract
The negative correlation between diets rich in fruits and vegetables and the occurrence of cardiovascular disease, stroke, cancer, atherosclerosis, cognitive impairment and other deleterious conditions is well established, with flavonoids and other polyphenols held to be partly responsible for the beneficial effects. Initially, these effects were explained by their antioxidant ability, but the low concentrations of polyphenols in tissues and relatively slow reaction with free radicals suggested that, instead, they act by regulating cell signalling pathways. Here we summarise results demonstrating that the abandonment of an antioxidant role for food polyphenols is based on incomplete knowledge of the mechanism of the polyphenol-free radical reaction. New kinetic measurements show that the reaction is up to 1000 times faster than previously reported and lowers the damaging potential of the radicals. The results also show that the antioxidant action does not require phenolic groups, but only a carbon-centred free radical and an aromatic molecule. Thus, not only food polyphenols but also many of their metabolites are effective antioxidants, significantly increasing the antioxidant protection of cells and tissues. By restoring an important antioxidant role for food polyphenols, the new findings provide experimental support for the advocacy of diets rich in plant-derived food.
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de Oliveira SD, Araújo CM, Borges GDSC, Lima MDS, Viera VB, Garcia EF, de Souza EL, de Oliveira MEG. Improvement in physicochemical characteristics, bioactive compounds and antioxidant activity of acerola (Malpighia emarginata D.C.) and guava (Psidium guajava L.) fruit by-products fermented with potentially probiotic lactobacilli. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.110200] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Nauser T, Gebicki JM. Addition of carbon-centered radicals to aromatic antioxidants: mechanistic aspects. Phys Chem Chem Phys 2020; 22:24572-24582. [PMID: 33094780 DOI: 10.1039/d0cp04469e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Several recent studies have shown that the rates of formation of adduct radicals between carbon-centred radicals and aromatic molecules are virtually diffusion-controlled and reversible. This contrasts with "radical addition", the well-known multistep reaction in preparative organic chemistry where the rate-determining initial formation of radical adducts is perceived to be several orders of magnitude slower and virtually irreversible. Using pulse radiolysis and spectroscopic analysis, we have now re-examined parts of this complex mechanism. The results have significant implications for biological systems: electron-rich, aromatic structures may act like buffers for radicals, moderating their reactivity resulting in a much slower reaction determining the overall rate of oxidation. In vivo, an organism would gain time for an appropriate antioxidant reaction.
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Affiliation(s)
- Thomas Nauser
- Departement für Chemie und Angewandte Biowissenschaften, ETH Zürich, 8093 Zürich, Switzerland.
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Tung WC, Rizzo B, Dabbagh Y, Saraswat S, Romanczyk M, Codorniu-Hernández E, Rebollido-Rios R, Needs PW, Kroon PA, Rakotomanomana N, Dangles O, Weikel K, Vinson J. Polyphenols bind to low density lipoprotein at biologically relevant concentrations that are protective for heart disease. Arch Biochem Biophys 2020; 694:108589. [PMID: 33010229 DOI: 10.1016/j.abb.2020.108589] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/14/2020] [Accepted: 09/16/2020] [Indexed: 02/05/2023]
Abstract
There is ample evidence in the epidemiological literature that polyphenols, the major non-vitamin antioxidants in plant foods and beverages, have a beneficial effect on heart disease. Until recently other mechanisms which polyphenols exhibit such as cell signaling and regulating nitric oxide bioavailability have been investigated. The oxidation theory of atherosclerosis implicates LDL oxidation as the beginning step in this process. Nine polyphenols from eight different classes and several of their O-methylether, O-glucuronide and O-sulfate metabolites have been shown in this study to bind to the lipoproteins and protect them from oxidation at lysosomal/inflammatory pH (5.2), and physiological pH (7.4). Polyphenols bind to the apoprotein at pH 7.4 with Kb > 106 M-1 and the number of molecules of polyphenols bound per LDL particle under saturation conditions varied from 0.4 for ferulic acid to 13.1 for quercetin. Competition studies between serum albumin and LDL show that substantial lipoprotein binding occurs even in the presence of a great molar excess of albumin, the major blood protein. These in vitro results are borne out by published human supplementation studies showing that polyphenol metabolites from red wine, olive oil and coffee are found in LDL even after an overnight fast. A single human supplementation with various fruit juices, coffee and tea also produced an ex vivo protection against lipoprotein oxidation under postprandial conditions. This in vivo binding is heart-protective based on published olive oil consumption studies. Relevant to heart disease, we hypothesize that the binding of polyphenols and metabolites to LDL functions as a transport mechanism to carry these antioxidants to the arterial intima, and into endothelial cells and macrophages. Extracellular and intracellular polyphenols and their metabolites are heart-protective by many mechanisms and can also function as potent "intraparticle" and intracellular antioxidants due to their localized concentrations that can reach as high as the micromolar level. Low plasma concentrations make polyphenols and their metabolites poor plasma antioxidants but their concentration in particles such as lipoproteins and cells is high enough for polyphenols to provide cardiovascular protection by direct antioxidant effects and by other mechanisms such as cell signaling.
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Affiliation(s)
- Wei-Cheng Tung
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA
| | - Bryan Rizzo
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA
| | - Yusef Dabbagh
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA
| | - Suraj Saraswat
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA
| | - Mark Romanczyk
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA
| | - Edelsys Codorniu-Hernández
- Department of Chemistry, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N1N4, Canada
| | - Rocio Rebollido-Rios
- Research Group Bioinformatics, Faculty of Biology, Center for Medical Biotechnology, University of Duisburg-Essen, Universitätsstrase 1-5, 45141, Essen, Germany; Faculty of Medicine and University Hospital of Cologne, Department of Internal Medicine, University of Cologne, 50937, Cologne, Germany
| | - Paul W Needs
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, NR4 7UQ, UK
| | - Paul A Kroon
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, NR4 7UQ, UK
| | | | - Olivier Dangles
- Avignon University, INRAE, UMR408 SQPOV, 84000, Avignon, France
| | - Karen Weikel
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA
| | - Joe Vinson
- Department of Chemistry, Loyola Science Center, University of Scranton, Scranton, PA, 18510, USA.
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Antioxidants and radical damage in a hydrophilic environment: chemical reactions and concepts. Essays Biochem 2019; 64:67-74. [DOI: 10.1042/ebc20190063] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/14/2019] [Accepted: 11/18/2019] [Indexed: 12/29/2022]
Abstract
AbstractKnown endogenous antioxidants are unlikely to prevent radical damage due to oxidative stress or achieve complete repair by established reaction mechanisms. While near complete prevention seems very unrealistic, some of the initial damage can be repaired. Depending on tissue, this may be even a large fraction. Antioxidants, however, will efficiently break radical reaction chains and, therefore, certainly limit the damage caused by radicals. It is not clear if chemical antioxidant action is strictly limited to electron-transfer processes or if additional reaction mechanisms may contribute.
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