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Boopathi E, Den RB, Thangavel C. Innate Immune System in the Context of Radiation Therapy for Cancer. Cancers (Basel) 2023; 15:3972. [PMID: 37568788 PMCID: PMC10417569 DOI: 10.3390/cancers15153972] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 07/24/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Radiation therapy (RT) remains an integral component of modern oncology care, with most cancer patients receiving radiation as a part of their treatment plan. The main goal of ionizing RT is to control the local tumor burden by inducing DNA damage and apoptosis within the tumor cells. The advancement in RT, including intensity-modulated RT (IMRT), stereotactic body RT (SBRT), image-guided RT, and proton therapy, have increased the efficacy of RT, equipping clinicians with techniques to ensure precise and safe administration of radiation doses to tumor cells. In this review, we present the technological advancement in various types of RT methods and highlight their clinical utility and associated limitations. This review provides insights into how RT modulates innate immune signaling and the key players involved in modulating innate immune responses, which have not been well documented earlier. Apoptosis of cancer cells following RT triggers immune systems that contribute to the eradication of tumors through innate and adoptive immunity. The innate immune system consists of various cell types, including macrophages, dendritic cells, and natural killer cells, which serve as key mediators of innate immunity in response to RT. This review will concentrate on the significance of the innate myeloid and lymphoid lineages in anti-tumorigenic processes triggered by RT. Furthermore, we will explore essential strategies to enhance RT efficacy. This review can serve as a platform for researchers to comprehend the clinical application and limitations of various RT methods and provides insights into how RT modulates innate immune signaling.
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Affiliation(s)
- Ettickan Boopathi
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Robert B. Den
- Department of Radiation Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA;
| | - Chellappagounder Thangavel
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
- Department of Radiation Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA;
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2
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Marzec ME, Rząca C, Moskal P, Stępień EŁ. Study of the influence of hyperglycemia on the abundance of amino acids, fatty acids, and selected lipids in extracellular vesicles using TOF-SIMS. Biochem Biophys Res Commun 2022; 622:30-36. [PMID: 35843091 DOI: 10.1016/j.bbrc.2022.07.020] [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: 06/24/2022] [Accepted: 07/06/2022] [Indexed: 11/26/2022]
Abstract
Time-of-flight secondary ion mass spectrometry (TOF-SIMS) with the Bi3+ liquid metal ion gun was used to investigate the content of lipids and amino acids (AAs) in extracellular vesicles (EVs). We induced metabolic changes in human pancreatic β-cells by stimulation with high glucose concentrations (35 mM) and tested the hypothesis of hyperglycemia (HG) has a detrimental effect on lipids and AAs in released EV subpopulations: ectosomes and exosomes. As a result of HG treatment, selected fatty acids (FAs) such as arachidonic, myristic and palmitic acids, changed their abundance in ectosomes and exosomes. Also, intensities of the characteristic peaks for cholesterol (m/z 95.09; 147.07; 161.11; 369.45) along with the molecular ion m/z 386.37 [C27H46O+] under HG conditions, both for ectosomes and exosomes, have changed significantly. Comparative analysis of HG EVs and normoglycemic (NG) ones showed statistically significant differences in the signal intensities of four AAs: valine (m/z 72.08 and 83.05), isoleucine (m/z 86.10), phenylalanine (m/z 120.08 and 132.05) and tyrosine (m/z 107.05 and 136.09). We confirmed that ToF-SIMS is a useful technique to study selected AAs and lipid profiles in various EV subpopulations. Our study is the first demonstration of changes in FAs and AAs in exosomes and ectosomes derived from β-cells under the influence of HG.
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Affiliation(s)
- Magdalena E Marzec
- Department of Medical Physics, M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Lojasiewicza 11 St, 30-348, Krakow, Poland; Center for Theranostics, Jagiellonian University, Kopernika 40 St, 31-501, Krakow, Poland
| | - Carina Rząca
- Department of Medical Physics, M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Lojasiewicza 11 St, 30-348, Krakow, Poland; Center for Theranostics, Jagiellonian University, Kopernika 40 St, 31-501, Krakow, Poland
| | - Paweł Moskal
- Center for Theranostics, Jagiellonian University, Kopernika 40 St, 31-501, Krakow, Poland; Department of Experimental Particle Physics and Applications, M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Lojasiewicza 11 St, 30-348, Krakow, Poland
| | - Ewa Ł Stępień
- Department of Medical Physics, M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Lojasiewicza 11 St, 30-348, Krakow, Poland; Center for Theranostics, Jagiellonian University, Kopernika 40 St, 31-501, Krakow, Poland.
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3
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Suppression of COX-2/PGE2 levels by carbazole-linked triazoles via modulating methylglyoxal-AGEs and glucose-AGEs – Induced ROS/NF-κB signaling in monocytes. Cell Signal 2022; 97:110372. [DOI: 10.1016/j.cellsig.2022.110372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 11/23/2022]
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Jahan H, Siddiqui NN, Iqbal S, Basha FZ, Khan MA, Aslam T, Choudhary MI. Indole-linked 1,2,3-triazole derivatives efficiently modulate COX-2 protein and PGE 2 levels in human THP-1 monocytes by suppressing AGE-ROS-NF-kβ nexus. Life Sci 2022; 291:120282. [PMID: 34990649 DOI: 10.1016/j.lfs.2021.120282] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/20/2021] [Accepted: 12/26/2021] [Indexed: 12/25/2022]
Abstract
AIMS AGEs augment inflammatory responses by activating inflammatory cascade in monocytes, and hence lead to vascular dysfunction. The current study aims to study a plausible role and mechanism of a new library of indole-tethered 1,2,3-triazoles 2-13 in AGEs-induced inflammation. MATERIAL AND METHODS Initially, the analogs 2-13 were synthesized by cycloaddition reaction between prop-2-yn-1-yl-2-(1H-indol-3-yl) acetate (1) and azidoacetophenone (1a). In vitro glycation, and metabolic assays were employed to investigate antiglycation and cytotoxicity activities of new indole-triazoles. DCFH-DA, immunostaining, Western blotting, and ELISA techniques were used to study the reactive oxygen species (ROS), and pro-inflammatory mediators levels. KEY FINDINGS Among all the synthesized indole-triazoles, compounds 1-3, and 9-13, and their precursor molecule 1 were found to be active against AGEs production in in vitro glucose- and methylglyoxal (MGO)-BSA models. Compounds 1-2, and 11-13 were also found to be nontoxic against HEPG2, and THP-1 cells. Our results show that pretreatment of THP-1 monocytes with selected lead compounds 1-2, and 11-13, particularly compounds 12, and 13, reduced glucose- and MGO-derived AGEs-mediated ROS production (P < 0.001), as compared to standards, PDTC, rutin, and quercetin. They also significantly (P < 0.001) suppressed NF-ĸB translocation in THP-1 monocytes. Moreover, compounds 12, and 13 attenuated the AGEs-induced COX-2 protein levels (P < 0.001), and PGE2 production (P < 0.001) in THP-1 monocytes. SIGNIFICANCE Our data revealed that the indole-triazoles 12, and 13 can significantly attenuate the AGEs-induced proinflammatory COX-2 levels, and associated PGE2 production by suppressing AGE-ROS-NF-Kβ nexus in THP-1 monocytes. These compounds can thus serve as leads for further evaluation as treatment to delay early onset of diabetic complications.
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Affiliation(s)
- Humera Jahan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
| | - Nimra Naz Siddiqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Shazia Iqbal
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Fatima Z Basha
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Maria Aqeel Khan
- Third World Center for Science and Technology, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Tooba Aslam
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - M Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Komplek Kampus C, Jl. Mulyorejo, Surabaya 60115, Indonesia.
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5
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Hamedi-Kalajahi F, Zarezadeh M, Dehghani A, Musazadeh V, Kolahi A, Shabbidar S, Djafarian K. A systematic review and meta-analysis on the impact of oral vitamin E supplementation on apolipoproteins A1 and B100. Clin Nutr ESPEN 2021; 46:106-114. [PMID: 34857183 DOI: 10.1016/j.clnesp.2021.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/10/2021] [Accepted: 09/16/2021] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND AIM Cardiovascular diseases (CVDs) are the number one cause of mortality worldwide. Apolipoprotein B (ApoB), apolipoprotein A1 (ApoA1), and ApoB/ApoA1 ratio are considered as predictors of CVD alongside with lipid profile. Evidence suggest that nutrients with antioxidant properties, especially vitamin E, are essential for a healthy cardiovascular system. The aim of present meta-analysis was to determine the effect alpha-tocopherol on ApoA1 and ApoB levels. METHODS PubMed-Medline and SCOPUS databases and Google Scholar were searched up to July 2021. Random-effects model was employed to perform meta-analysis. In order to find heterogeneity sources, subgroup analysis was performed. Trim and fill analysis was performed in case of presence of publication bias. Quality assessment was performed using Cochrane Collaboration's tool. RESULTS Seven eligible studies, involving 1284 individuals were included. Mean age of participants ranged between 25.4 and 59 years. There was no significant effect of vitamin E supplementation on Apo A1 (SMD = 0.22 IU/d; 95% CI: -0.38, 0.28; P = 0.481) and Apo B levels (SMD = -0.62 IU/d; 95% CI: -1.94, 0.70; P = 0.360). CONCLUSION No remarkable effect of vitamin E supplementation was observed on ApoA1 and ApoB levels in adults. Additional studies investigating the influence of vitamin E on apolipoproteins as primary outcome with larger sample size are suggested.
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Affiliation(s)
- Fateme Hamedi-Kalajahi
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Meysam Zarezadeh
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Azadeh Dehghani
- Department of Community Nutrition, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vali Musazadeh
- Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ahmadreza Kolahi
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Sakineh Shabbidar
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Kourosh Djafarian
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
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Brigelius-Flohé R. Vitamin E research: Past, now and future. Free Radic Biol Med 2021; 177:381-390. [PMID: 34756995 DOI: 10.1016/j.freeradbiomed.2021.10.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 10/07/2021] [Accepted: 10/09/2021] [Indexed: 12/13/2022]
Abstract
The early history of vitamin E from its discovery by Herbert M. Evans and Katharine J. S. Bishop in 1922 up to its chemical synthesis by Paul Karrer and coworkers in 1938 and the development of the concept that vitamin E acts as an antioxidant in vivo are recalled. Some more recent results shedding doubt on this hypothesis are reviewed. They comprise influence of vitamin E on enzyme activities, signaling cascades, gene expression and bio-membrane structure. The overall conclusion is that our knowledge of the vitamin's mechanism of action still remains fragmentary. The metabolism of tocopherols and tocotrienols is presented and discussed in respect to bioactivity of the metabolites, interference with drug metabolism and the future design of clinical trials. Some strategies are recommended how to reach the final goal: the identification of the primary vitamin E target(s) and the analysis of the downstream events up to the physiological phenomena.
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Affiliation(s)
- Regina Brigelius-Flohé
- German Institute of Human Nutrition Potsdam Rehbrücke, Arthur-Scheunert-Alle 114-116, 14558, Nuthetal, Germany.
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7
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Zingg JM, Vlad A, Ricciarelli R. Oxidized LDLs as Signaling Molecules. Antioxidants (Basel) 2021; 10:antiox10081184. [PMID: 34439432 PMCID: PMC8389018 DOI: 10.3390/antiox10081184] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 12/14/2022] Open
Abstract
Levels of oxidized low-density lipoproteins (oxLDLs) are usually low in vivo but can increase whenever the balance between formation and scavenging of free radicals is impaired. Under normal conditions, uptake and degradation represent the physiological cellular response to oxLDL exposure. The uptake of oxLDLs is mediated by cell surface scavenger receptors that may also act as signaling molecules. Under conditions of atherosclerosis, monocytes/macrophages and vascular smooth muscle cells highly exposed to oxLDLs tend to convert to foam cells due to the intracellular accumulation of lipids. Moreover, the atherogenic process is accelerated by the increased expression of the scavenger receptors CD36, SR-BI, LOX-1, and SRA in response to high levels of oxLDL and oxidized lipids. In some respects, the effects of oxLDLs, involving cell proliferation, inflammation, apoptosis, adhesion, migration, senescence, and gene expression, can be seen as an adaptive response to the rise of free radicals in the vascular system. Unlike highly reactive radicals, circulating oxLDLs may signal to cells at more distant sites and possibly trigger a systemic antioxidant defense, thus elevating the role of oxLDLs to that of signaling molecules with physiological relevance.
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Affiliation(s)
- Jean-Marc Zingg
- Miller School of Medicine, University of Miami, Miami, FL 33136, USA
- Correspondence: (J.-M.Z.); (R.R.); Tel.: +1-(305)-2433531 (J.-M.Z.); +39-010-3538831 (R.R.)
| | - Adelina Vlad
- Physiology Department, “Carol Davila” UMPh, 020021 Bucharest, Romania;
| | - Roberta Ricciarelli
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy
- IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
- Correspondence: (J.-M.Z.); (R.R.); Tel.: +1-(305)-2433531 (J.-M.Z.); +39-010-3538831 (R.R.)
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8
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Mohammad A, Falahi E, Barakatun-Nisak MY, Hanipah ZN, Redzwan SM, Yusof LM, Gheitasvand M, Rezaie F. Systematic review and meta-analyses of vitamin E (alpha-tocopherol) supplementation and blood lipid parameters in patients with diabetes mellitus. Diabetes Metab Syndr 2021; 15:102158. [PMID: 34186370 DOI: 10.1016/j.dsx.2021.05.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 05/23/2021] [Accepted: 05/25/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND AND AIMS The studies have shown that α-tocopherol supplementation could improve lipid profile in diabetes mellitus (DM) patients. Nonetheless, the result remains inconsistent. Therefore, this meta-analysis was performed to evaluate the efficacy of α-tocopherol supplement on lipid parameters in DM patients. METHODS We conducted an extensive search via Cochrane Library, PubMed, Scopus, and Web of Science databases to acquire the reported RCTs up to October 2020. RESULTS The results showed no effects of α-tocopherol supplementation on lipid profile in DM patients except when used ≥12 weeks. CONCLUSIONS α-tocopherol supplementation in DM patients had no significant effect on lipid profiles.
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Affiliation(s)
- Abolfathi Mohammad
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
| | - Ebrahim Falahi
- Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran.
| | - Mohd Yusof Barakatun-Nisak
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400, Serdang, Selangor, Malaysia; Research Centre of Excellence for NCD (Nutrition and Non-communicable Diseases), Universiti Putra Malaysia, UPM, 43400, Serdang, Selangor, Malaysia.
| | - Zubaidah Nor Hanipah
- Department of Surgery, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
| | - S Mohd Redzwan
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
| | - Loqman Mohamad Yusof
- Department of Companion Animal Medicine and Surgery, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400, Serdang, Selangor, Malaysia.
| | - Mohsen Gheitasvand
- Department of Pathology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.
| | - Farahnaz Rezaie
- Department of Pathology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.
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Díaz-Del Cerro E, Vida C, Martínez de Toda I, Félix J, De la Fuente M. The use of a bed with an insulating system of electromagnetic fields improves immune function, redox and inflammatory states, and decrease the rate of aging. Environ Health 2020; 19:118. [PMID: 33228714 PMCID: PMC7685570 DOI: 10.1186/s12940-020-00674-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 11/02/2020] [Indexed: 05/07/2023]
Abstract
BACKGROUND The immune system, as a homeostatic system, is an excellent marker of health and has also been proposed as an indicator of the rate of aging. The base of the age-related changes in the immune system, "immunosenescence", is oxidative-inflammatory stress. Studies have shown that long-term exposure to electromagnetic fields (EMFs) produced by technology causes inhibitory effects on the immune response and increases oxidation. The aim of the present study was to investigate the effects of resting on an EMF-insulated system on several immune functions, the oxidative-inflammatory state and subsequently the rate of aging (biological age). METHODS Several immune functions, in peripheral blood neutrophils and mononuclear cells, of 31 volunteers were analyzed before and after 2 months of using a bed with the patented HOGO system, which insulated participants against EMFs. Several oxidative and inflammatory parameters, in whole blood cells, were also studied. The biological age was calculated using a mathematical formula, which was based on several immune function parameters. A placebo group of 11 people using beds without that property were used as a control. RESULTS The results showed a significant improvement of immune functions and antioxidant and anti-inflammatory defenses after using the HOGO system for 2 months. In addition, a decrease in oxidants and pro-inflammatory compounds, a lowering of oxidative damage in lipids and in DNA as well as a reduction of calculated biological age was also observed. The placebo group did not show any changes. CONCLUSIONS In conclusion, 2 months of resting on a bed insulated from EMFs demonstrates improvement in immune function, oxidative-inflammatory state and biological age.
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Affiliation(s)
- E. Díaz-Del Cerro
- Department of Genetics, Physiology and Microbiology (Unity of Animal Physiology), Faculty of Biology, Complutense University of Madrid (UCM), José Antonio Novais, 12, 28040 Madrid, Spain
| | - C. Vida
- Department of Genetics, Physiology and Microbiology (Unity of Animal Physiology), Faculty of Biology, Complutense University of Madrid (UCM), José Antonio Novais, 12, 28040 Madrid, Spain
- Institute of Investigation 12 de Octubre (i+12), Madrid, Spain
| | - I. Martínez de Toda
- Department of Genetics, Physiology and Microbiology (Unity of Animal Physiology), Faculty of Biology, Complutense University of Madrid (UCM), José Antonio Novais, 12, 28040 Madrid, Spain
- Institute of Investigation 12 de Octubre (i+12), Madrid, Spain
- Applied Molecular Medicine Institute, School of Medicine, Universidad San Pablo CEU, CEU Universities, Madrid, Spain
| | - J. Félix
- Department of Genetics, Physiology and Microbiology (Unity of Animal Physiology), Faculty of Biology, Complutense University of Madrid (UCM), José Antonio Novais, 12, 28040 Madrid, Spain
| | - M. De la Fuente
- Department of Genetics, Physiology and Microbiology (Unity of Animal Physiology), Faculty of Biology, Complutense University of Madrid (UCM), José Antonio Novais, 12, 28040 Madrid, Spain
- Institute of Investigation 12 de Octubre (i+12), Madrid, Spain
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Migdał P, Murawska A, Strachecka A, Bieńkowski P, Roman A. Changes in the Honeybee Antioxidant System after 12 h of Exposure to Electromagnetic Field Frequency of 50 Hz and Variable Intensity. INSECTS 2020; 11:insects11100713. [PMID: 33081029 PMCID: PMC7603132 DOI: 10.3390/insects11100713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/16/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
Simple Summary The honeybee is one of the most important links in the food production chain. In the environment of bee life, there are many threats that they have to face. Among them, we can distinguish pesticides, climate change, and predators. The intensive development of technology resulted in filling the natural environment with E-field of various frequencies and intensities. The study investigated the effect of the E-field with a frequency of 50 Hz at various intensities on the antioxidant system of the honeybee. The exposure of the bees lasted 12 h. The activity of the antioxidant system was investigated in hemolymph collected from young bees. Research has been undertaken in this direction because research by other authors has taken years to stimulate this system through the E-field. The superoxide dismutase (SOD), Catalase (CAT), and total antioxidant potential (FRAP) activity as major antioxidant enzymes were characterized. Research showed changes in the activity of SOD, CAT, and FRAP in all tested groups compared to the control group. The study of E-field appearing in the life of a honeybee enables an understanding of the impact of this factor on its functioning because food production depends on the integrity of this pollinator. Abstract In recent years, on a global scale, more and more reports of a phenomenon called CCD (Colony Collapse Disorder) have been reported. In addition to pesticides, diseases, and other environmental stressors, electromagnetic fields are also mentioned as one of the possible causes of CCD. One of the body’s first lines of defense against harmful factors is the antioxidant system. We hypothesized that electromagnetic field upregulate the activity of SOD (superoxide dismutase), CAT (catalases), and changed FRAP (total antioxidant potential) in honeybee hemolymph. In our research, 12 h bee’s exposure to E-field was analyzed to determine changes in the antioxidant system. The frequency of 50 Hz and various intensities were used: 5.0 kV/m, 11.5 kV/m, 23.0 kV/m, and 34.5 kV/m. Superoxide dismutase was characterized by four times higher activity in the study groups as compared to the control group. Catalase activity in all groups was characterized by statistically significantly different activity between the groups. The highest activity was recorded in the 34.5 kV/m group. The lowest activity was recorded in the 11.5 kV/m group. A relationship was found between different E-field intensities and changes in the antioxidant system.
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Affiliation(s)
- Paweł Migdał
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida st., 51-630 Wroclaw, Poland; (A.M.); (A.R.)
- Correspondence:
| | - Agnieszka Murawska
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida st., 51-630 Wroclaw, Poland; (A.M.); (A.R.)
| | - Aneta Strachecka
- Institute of Biological Basis of Animal Production, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland;
| | - Paweł Bieńkowski
- Telecommunications and Teleinformatics Department, Wroclaw University of Science and Technology, 27 Wybrzeze Wyspianskiego st., 50-370 Wroclaw, Poland;
| | - Adam Roman
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida st., 51-630 Wroclaw, Poland; (A.M.); (A.R.)
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Abstract
A new cardiometabolic-based chronic disease (CMBCD) model is presented that provides a basis for early and sustainable, evidence-based therapeutic targeting to promote cardiometabolic health and mitigate the development and ravages of cardiovascular disease. In the first part of this JACC State-of-the-Art Review, a framework is presented for CMBCD, focusing on 3 primary drivers (genetics, environment, and behavior) and 2 metabolic drivers (adiposity and dysglycemia) with applications to 3 cardiovascular endpoints (coronary heart disease, heart failure, and atrial fibrillation). Specific mechanistic pathways are presented configuring early primary drivers with subsequent adiposity, insulin resistance, β-cell dysfunction, and metabolic syndrome, leading to cardiovascular disease. The context for building this CMBCD model is to expose actionable targets for prevention to achieve optimal cardiovascular outcomes. The tactical implementation of this CMBCD model is the subject of second part of this JACC State-of-the-Art Review.
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Cardiometabolic-Based Chronic Disease, Adiposity and Dysglycemia Drivers: JACC State-of-the-Art Review. J Am Coll Cardiol 2020; 75:525-538. [PMID: 32029136 DOI: 10.1016/j.jacc.2019.11.044] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/06/2019] [Accepted: 11/17/2019] [Indexed: 02/07/2023]
Abstract
A new cardiometabolic-based chronic disease (CMBCD) model is presented that provides a basis for early and sustainable, evidence-based therapeutic targeting to promote cardiometabolic health and mitigate the development and ravages of cardiovascular disease. In the first part of this JACC State-of-the-Art Review, a framework is presented for CMBCD, focusing on 3 primary drivers (genetics, environment, and behavior) and 2 metabolic drivers (adiposity and dysglycemia) with applications to 3 cardiovascular endpoints (coronary heart disease, heart failure, and atrial fibrillation). Specific mechanistic pathways are presented configuring early primary drivers with subsequent adiposity, insulin resistance, β-cell dysfunction, and metabolic syndrome, leading to cardiovascular disease. The context for building this CMBCD model is to expose actionable targets for prevention to achieve optimal cardiovascular outcomes. The tactical implementation of this CMBCD model is the subject of second part of this JACC State-of-the-Art Review.
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Bagheri Hosseinabadi M, Khanjani N, Atashi A, Norouzi P, Mirbadie SR, Mirzaii M. The effect of vitamin E and C on comet assay indices and apoptosis in power plant workers: A double blind randomized controlled clinical trial. Mutat Res 2020; 850-851:503150. [PMID: 32247559 DOI: 10.1016/j.mrgentox.2020.503150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 01/24/2020] [Accepted: 01/29/2020] [Indexed: 12/17/2022]
Abstract
Extremely low frequency electromagnetic fields have been classified as a possible human carcinogen by the International Agency for Research on Cancer and this has raised some concern about its health effects on employees extensively exposed to these fields at thermal power plants. In this study, the effect of using vitamin E and C supplements have been examined on employees working at a thermal power plant. In this randomized controlled, double-blind clinical trial, 81 employees from different parts of the thermal power plant were enrolled between July and November 2017, and divided into four groups: Group 1 received vitamin E (400 units/day), Group 2: vitamin C (1000 mg/day), Group 3: vitamin E + C and Group 4: no intervention. DNA damage was measured in peripheral blood lymphocytes using comet assay and apoptosis, using flow cytometry. Based on the results, tail intensity and tail length in the vitamin E group, and all comet assay indices in the vitamin E + C and vitamin C groups (except DNA damage index) significantly decreased after the intervention, while the comet assay indices did not change significantly in the control group. None of the flow cytometry indices including early apoptosis, late apoptosis and necrosis changed after intervention in either group. The use of antioxidant vitamins such as E and C, can increase the activity of the non-enzymatic antioxidant defense system, and protect DNA from damage caused by exposure to extremely low frequency magnetic fields. But, taking these vitamins has no effect on apoptosis. It seems that consumption of vitamin E affected all investigated comet assay indices and can be probably considered as the best intervention.
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Affiliation(s)
| | - Narges Khanjani
- Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Amir Atashi
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Pirasteh Norouzi
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | | | - Mehdi Mirzaii
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran.
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Maamoun H, Benameur T, Pintus G, Munusamy S, Agouni A. Crosstalk Between Oxidative Stress and Endoplasmic Reticulum (ER) Stress in Endothelial Dysfunction and Aberrant Angiogenesis Associated With Diabetes: A Focus on the Protective Roles of Heme Oxygenase (HO)-1. Front Physiol 2019; 10:70. [PMID: 30804804 PMCID: PMC6378556 DOI: 10.3389/fphys.2019.00070] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 01/21/2019] [Indexed: 12/17/2022] Open
Abstract
Type-2 diabetes prevalence is continuing to rise worldwide due to physical inactivity and obesity epidemic. Diabetes and fluctuations of blood sugar are related to multiple micro- and macrovascular complications, that are attributed to oxidative stress, endoplasmic reticulum (ER) activation and inflammatory processes, which lead to endothelial dysfunction characterized, among other features, by reduced availability of nitric oxide (NO) and aberrant angiogenic capacity. Several enzymatic anti-oxidant and anti-inflammatory agents have been found to play protective roles against oxidative stress and its downstream signaling pathways. Of particular interest, heme oxygenase (HO) isoforms, specifically HO-1, have attracted much attention as major cytoprotective players in conditions associated with inflammation and oxidative stress. HO operates as a key rate-limiting enzyme in the process of degradation of the iron-containing molecule, heme, yielding the following byproducts: carbon monoxide (CO), iron, and biliverdin. Because HO-1 induction was linked to pro-oxidant states, it has been regarded as a marker of oxidative stress; however, accumulating evidence has established multiple cytoprotective roles of the enzyme in metabolic and cardiovascular disorders. The cytoprotective effects of HO-1 depend on several cellular mechanisms including the generation of bilirubin, an anti-oxidant molecule, from the degradation of heme; the induction of ferritin, a strong chelator of free iron; and the release of CO, that displays multiple anti-inflammatory and anti-apoptotic actions. The current review article describes the major molecular mechanisms contributing to endothelial dysfunction and altered angiogenesis in diabetes with a special focus on the interplay between oxidative stress and ER stress response. The review summarizes the key cytoprotective roles of HO-1 against hyperglycemia-induced endothelial dysfunction and aberrant angiogenesis and discusses the major underlying cellular mechanisms associated with its protective effects.
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Affiliation(s)
- Hatem Maamoun
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Tarek Benameur
- College of Medicine, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Gianfranco Pintus
- Department of Biomedical Sciences, College of Health Sciences, Qatar University, Doha, Qatar
| | - Shankar Munusamy
- Department of Pharmaceutical and Administrative Sciences, College of Pharmacy and Health Sciences, Drake University, Des Moines, IA, United States
| | - Abdelali Agouni
- Department of Pharmaceutical Sciences, College of Pharmacy, Qatar University, Doha, Qatar
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15
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Zhao H, Shu L, Huang W, Wang W, Song G. Difference Analysis Of Related Factors In Macrovascular And Microvascular Complications In Chinese Patients With Type 2 Diabetes Mellitus: A Case-Control Study Protocol. Diabetes Metab Syndr Obes 2019; 12:2193-2200. [PMID: 31695462 PMCID: PMC6814870 DOI: 10.2147/dmso.s213848] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 09/16/2019] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Despite the increasingly young age at diabetes onset and the increasing number of deaths caused by type 2 diabetes mellitus (T2DM), why some patients develop macrovascular complications but others develop microvascular complications remains controversial and unclear. Notably, some patients have good glucose control but still develop vascular complications, whereas some patients have retinopathy with neither nephropathy nor neuropathy. This study will be performed to explore the risk factors for T2DM complications in Chinese patients. METHODS AND ANALYSIS Patients with T2DM and healthy people will be recruited from Hebei General Hospital from September 2019 to September 2020. The subjects will be grouped into a control group, T2DM without vascular complications group, T2DM with macrovascular complications group, and T2DM with microvascular complications group; they will then be further subgrouped. The following data will be collected after admission: demographic information such as age, sex, and education; relevant medical history such as duration of diabetes, family history of first-degree relatives with diabetes, and age at diagnosis of diabetes; and anthropometric and blood indicators such as weight, waist circumference, fasting blood glucose level, C-peptide level, total cholesterol level, and triglyceride level. The statistical analysis will be performed using SPSS 22.0 (IBM Corp., Armonk, NY, USA). A P value of <0.05 will be considered statistically significant. The χ2 test, one-way analysis of variance and the rank sum test will be used to analyze differences between the groups. Logistic regression will be used to analyze the risk factors for macrovascular and microvascular complications of T2DM.
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Affiliation(s)
- Hang Zhao
- Endocrinology Department, Hebei General Hospital, Shijiazhuang, Hebei050051, People’s Republic of China
| | - Linyi Shu
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei050017, People’s Republic of China
| | - Wenli Huang
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei050017, People’s Republic of China
| | - Wenzhao Wang
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei050017, People’s Republic of China
| | - Guangyao Song
- Endocrinology Department, Hebei General Hospital, Shijiazhuang, Hebei050051, People’s Republic of China
- Correspondence: Guangyao Song Endocrinology Department, Hebei General Hospital, 348 Heping West Road, Shijiazhuang, Hebei050051, People’s Republic of ChinaTel +86 311 85988556 Email
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16
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Zingg JM. Vitamin E: Regulatory Role on Signal Transduction. IUBMB Life 2018; 71:456-478. [PMID: 30556637 DOI: 10.1002/iub.1986] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 01/02/2023]
Abstract
Vitamin E modulates signal transduction pathways by several molecular mechanisms. As a hydrophobic molecule located mainly in membranes it contributes together with other lipids to the physical and structural characteristics such as membrane stability, curvature, fluidity, and the organization into microdomains (lipid rafts). By acting as the main lipid-soluble antioxidant, it protects other lipids such as mono- and poly-unsaturated fatty acids (MUFA and PUFA, respectively) against chemical reactions with reactive oxygen and nitrogen species (ROS and RNS, respectively) and prevents membrane destabilization and cellular dysfunction. In cells, vitamin E affects signaling in redox-dependent and redox-independent molecular mechanisms by influencing the activity of enzymes and receptors involved in modulating specific signal transduction and gene expression pathways. By protecting and preventing depletion of MUFA and PUFA it indirectly enables regulatory effects that are mediated by the numerous lipid mediators derived from these lipids. In recent years, some vitamin E metabolites have been observed to affect signal transduction and gene expression and their relevance for the regulatory function of vitamin E is beginning to be elucidated. In particular, the modulation of the CD36/FAT scavenger receptor/fatty acids transporter by vitamin E may influence many cellular signaling pathways relevant for lipid homeostasis, inflammation, survival/apoptosis, angiogenesis, tumorigenesis, neurodegeneration, and senescence. Thus, vitamin E has an important role in modulating signal transduction and gene expression pathways relevant for its uptake, distribution, metabolism, and molecular action that when impaired affect physiological and patho-physiological cellular functions relevant for the prevention of a number of diseases. © 2018 IUBMB Life, 71(4):456-478, 2019.
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Affiliation(s)
- Jean-Marc Zingg
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, Florida, USA
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17
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Giri B, Dey S, Das T, Sarkar M, Banerjee J, Dash SK. Chronic hyperglycemia mediated physiological alteration and metabolic distortion leads to organ dysfunction, infection, cancer progression and other pathophysiological consequences: An update on glucose toxicity. Biomed Pharmacother 2018; 107:306-328. [PMID: 30098549 DOI: 10.1016/j.biopha.2018.07.157] [Citation(s) in RCA: 210] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/15/2018] [Accepted: 07/31/2018] [Indexed: 02/09/2023] Open
Abstract
Chronic exposure of glucose rich environment creates several physiological and pathophysiological changes. There are several pathways by which hyperglycemia exacerbate its toxic effect on cells, tissues and organ systems. Hyperglycemia can induce oxidative stress, upsurge polyol pathway, activate protein kinase C (PKC), enhance hexosamine biosynthetic pathway (HBP), promote the formation of advanced glycation end-products (AGEs) and finally alters gene expressions. Prolonged hyperglycemic condition leads to severe diabetic condition by damaging the pancreatic β-cell and inducing insulin resistance. Numerous complications have been associated with diabetes, thus it has become a major health issue in the 21st century and has received serious attention. Dysregulation in the cardiovascular and reproductive systems along with nephropathy, retinopathy, neuropathy, diabetic foot ulcer may arise in the advanced stages of diabetes. High glucose level also encourages proliferation of cancer cells, development of osteoarthritis and potentiates a suitable environment for infections. This review culminates how elevated glucose level carries out its toxicity in cells, metabolic distortion along with organ dysfunction and elucidates the complications associated with chronic hyperglycemia.
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Affiliation(s)
- Biplab Giri
- Department of Physiology, University of Gour Banga, Mokdumpur, Malda 732103, India; Experimental Medicine and Stem Cell Research Laboratory, Department of Physiology, West Bengal State University, Barasat, Kolkata 700126, India.
| | - Sananda Dey
- Department of Physiology, University of Gour Banga, Mokdumpur, Malda 732103, India; Experimental Medicine and Stem Cell Research Laboratory, Department of Physiology, West Bengal State University, Barasat, Kolkata 700126, India
| | - Tanaya Das
- Experimental Medicine and Stem Cell Research Laboratory, Department of Physiology, West Bengal State University, Barasat, Kolkata 700126, India
| | - Mrinmoy Sarkar
- Experimental Medicine and Stem Cell Research Laboratory, Department of Physiology, West Bengal State University, Barasat, Kolkata 700126, India
| | - Jhimli Banerjee
- Department of Physiology, University of Gour Banga, Mokdumpur, Malda 732103, India
| | - Sandeep Kumar Dash
- Department of Physiology, University of Gour Banga, Mokdumpur, Malda 732103, India.
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18
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Rad EY, Falahi E, Djalali M, Abbasnezhad A, Birjandi M, Saboori S. Effect of Vitamin E Supplementation on Plasma and Urine Levels of Isoprostane F2α in Randomized Controlled Clinical Trials: A Systematic Review and Meta-Analysis. INT J VITAM NUTR RES 2018; 87:314-321. [PMID: 30010514 DOI: 10.1024/0300-9831/a000488] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Vitamin E can reduce the level of lipid peroxidation and the related markers such as urine and plasma levels of isoprostanes. However, effects of vitamin E supplementation on plasma and urine level of isoprostane F2α as markers of lipid peroxidation were conflicting in various clinical trials. The current meta-analysis was carried out to determine the effects of vitamin E supplementation on plasma and urine levels of isoprostanes F2α in randomized clinical trials. A systematic search of RCTs was carried out in PubMed, Scopus, Science Direct and Cochrane Library databases. OF 889 relevantly founded articles, only four articles with five arms met the criteria for meta-analysis of plasma level of isoprostanes F2α. For the urine level of isoprostane F2α, three studies with 14 arms were included in the meta-analysis. After pooled analyzing, a significant reduction of 6.98 ng / l was seen in plasma level of isoprostane F2α in vitamin E receiving group (95% CI = -11.2, -2.76; P < 0.001) while no significant heterogeneity was seen between the studies included in this meta-analysis (P = 0.81 and I2 = 0.0%). However, the pooled effect of vitamin E supplementation on urine level of isoprostane F2α was not statistically significant (-11.31 pg / mg creatinine (95% CI = -26.4, 3.78; P = 0.88). Results of this meta-analysis have shown that vitamin E supplementation can only reduce plasma level of isoprostane F2α and has no significant effect on reducing urine level of this biomarker.
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Affiliation(s)
- Esmaeil Yousefi Rad
- 1 Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Ebrahim Falahi
- 1 Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mahmoud Djalali
- 2 Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Abbasnezhad
- 1 Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mehdi Birjandi
- 1 Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Somayeh Saboori
- 1 Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
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Lee MY, Hsiao PJ, Huang JC, Hsu WH, Chen SC, Shin SJ. Association Between Metabolic Syndrome and Microvascular and Macrovascular Disease in Type 2 Diabetic Mellitus. Am J Med Sci 2018; 355:342-349. [DOI: 10.1016/j.amjms.2017.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/04/2017] [Accepted: 12/06/2017] [Indexed: 12/26/2022]
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20
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El Hadi H, Vettor R, Rossato M. Vitamin E as a Treatment for Nonalcoholic Fatty Liver Disease: Reality or Myth? Antioxidants (Basel) 2018; 7:antiox7010012. [PMID: 29337849 PMCID: PMC5789322 DOI: 10.3390/antiox7010012] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 12/30/2022] Open
Abstract
Obesity is one of the major epidemics of this millennium, and its incidence is growing worldwide. Following the epidemics of obesity, nonalcoholic fatty liver disease (NAFLD) has become a disease of increasing prevalence and a leading cause of morbidity and mortality closely related to cardiovascular disease, malignancies, and cirrhosis. It is believed that oxidative stress is a main player in the development and progression of NAFLD. Currently, a pharmacological approach has become necessary in NAFLD because of a failure to modify lifestyle and dietary habits in most patients. Vitamin E is a potent antioxidant that has been shown to reduce oxidative stress in NAFLD. This review summarizes the biological activities of vitamin E, with a primary focus on its therapeutic efficacy in NAFLD.
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Affiliation(s)
- Hamza El Hadi
- Internal Medicine 3, Department of Medicine-DIMED, University of Padova, Via Giustiniani 2, 35128 Padova, Italy.
| | - Roberto Vettor
- Internal Medicine 3, Department of Medicine-DIMED, University of Padova, Via Giustiniani 2, 35128 Padova, Italy.
| | - Marco Rossato
- Internal Medicine 3, Department of Medicine-DIMED, University of Padova, Via Giustiniani 2, 35128 Padova, Italy.
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21
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Schmölz L, Wallert M, Rozzino N, Cignarella A, Galli F, Glei M, Werz O, Koeberle A, Birringer M, Lorkowski S. Structure–Function Relationship Studies In Vitro Reveal Distinct and Specific Effects of Long‐Chain Metabolites of Vitamin E. Mol Nutr Food Res 2017; 61. [DOI: 10.1002/mnfr.201700562] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/10/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Lisa Schmölz
- Department of Nutritional Biochemistry and PhysiologyInstitute of NutritionFriedrich Schiller University Jena Jena Germany
- Competence Center for Nutrition and Cardiovascular Health (nutriCARD)Halle‐Jena‐Leipzig
| | - Maria Wallert
- Department of Nutritional Biochemistry and PhysiologyInstitute of NutritionFriedrich Schiller University Jena Jena Germany
- Competence Center for Nutrition and Cardiovascular Health (nutriCARD)Halle‐Jena‐Leipzig
- Baker Heart and Diabetes Institute Melbourne Australia
| | - Nicolò Rozzino
- Department of Pharmaceutical and Pharmacological SciencesUniversity of Padova Padova Italy
| | | | - Francesco Galli
- Department of Pharmaceutical SciencesLaboratory of Nutrition and Clinical BiochemistryUniversity of Perugia Perugia Italy
| | - Michael Glei
- Competence Center for Nutrition and Cardiovascular Health (nutriCARD)Halle‐Jena‐Leipzig
- Department of Nutritional ToxicologyInstitute of NutritionFriedrich Schiller University Jena Jena Germany
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal ChemistryInstitute of PharmacyFriedrich Schiller University Jena Jena Germany
| | - Andreas Koeberle
- Department of Pharmaceutical/Medicinal ChemistryInstitute of PharmacyFriedrich Schiller University Jena Jena Germany
| | - Marc Birringer
- Department of NutritionalFood and Consumer ScienceUniversity of Applied Sciences Fulda Germany
| | - Stefan Lorkowski
- Department of Nutritional Biochemistry and PhysiologyInstitute of NutritionFriedrich Schiller University Jena Jena Germany
- Competence Center for Nutrition and Cardiovascular Health (nutriCARD)Halle‐Jena‐Leipzig
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22
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Kıvrak EG, Yurt KK, Kaplan AA, Alkan I, Altun G. Effects of electromagnetic fields exposure on the antioxidant defense system. J Microsc Ultrastruct 2017; 5:167-176. [PMID: 30023251 PMCID: PMC6025786 DOI: 10.1016/j.jmau.2017.07.003] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/19/2017] [Accepted: 07/26/2017] [Indexed: 11/28/2022] Open
Abstract
Technological devices have become essential components of daily life. However, their deleterious effects on the body, particularly on the nervous system, are well known. Electromagnetic fields (EMF) have various chemical effects, including causing deterioration in large molecules in cells and imbalance in ionic equilibrium. Despite being essential for life, oxygen molecules can lead to the generation of hazardous by-products, known as reactive oxygen species (ROS), during biological reactions. These reactive oxygen species can damage cellular components such as proteins, lipids and DNA. Antioxidant defense systems exist in order to keep free radical formation under control and to prevent their harmful effects on the biological system. Free radical formation can take place in various ways, including ultraviolet light, drugs, lipid oxidation, immunological reactions, radiation, stress, smoking, alcohol and biochemical redox reactions. Oxidative stress occurs if the antioxidant defense system is unable to prevent the harmful effects of free radicals. Several studies have reported that exposure to EMF results in oxidative stress in many tissues of the body. Exposure to EMF is known to increase free radical concentrations and traceability and can affect the radical couple recombination. The purpose of this review was to highlight the impact of oxidative stress on antioxidant systems. Abbreviations: EMF, electromagnetic fields; RF, radiofrequency; ROS, reactive oxygen species; GSH, glutathione; GPx, glutathione peroxidase; GR, glutathione reductase; GST, glutathione S-transferase; CAT, catalase; SOD, superoxide dismutase; HSP, heat shock protein; EMF/RFR, electromagnetic frequency and radiofrequency exposures; ELF-EMFs, exposure to extremely low frequency; MEL, melatonin; FA, folic acid; MDA, malondialdehyde.
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Affiliation(s)
- Elfide Gizem Kıvrak
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Kıymet Kübra Yurt
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Arife Ahsen Kaplan
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Işınsu Alkan
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Gamze Altun
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
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Kim A, Lee W, Yun JM. Luteolin and fisetin suppress oxidative stress by modulating sirtuins and forkhead box O3a expression under in vitro diabetic conditions. Nutr Res Pract 2017; 11:430-434. [PMID: 28989580 PMCID: PMC5621366 DOI: 10.4162/nrp.2017.11.5.430] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/09/2017] [Accepted: 08/31/2017] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND/OBJECTIVE Chronic hyperglycemia induces oxidative stress via accumulation of reactive oxygen species (ROS) and contributes to diabetic complications. Hyperglycemia induces mitochondrial superoxide anion production through the increased activity of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. This study aimed to determine whether fisetin and luteolin treatments suppress the oxidative stress by modulating the expression of sirtuins (SIRTs) and forkhead box O3a (FOXO3a) under hyperglycemic conditions in human monocytes. MATERIALS/METHODS Human monocytic cells (THP-1) were cultured under osmotic control (14.5 mmol/L mannitol), normoglycemic (NG, 5.5 mmol/L glucose), or hyperglycemic (HG, 20 mmol/L glucose) conditions, in the absence or presence of fisetin and luteolin for 48 h. To determine the effect of fisetin and luteolin treatments on high glucose-induced oxidative stress, western blotting and intracellular staining were performed. RESULTS Hyperglycemic conditions increased the ROS production, as compared to normoglycemic condition. However, fisetin and luteolin treatments inhibited ROS production under hyperglycemia. To obtain further insight into ROS production in hyperglycemic conditions, evaluation of p47phox expression revealed that fisetin and luteolin treatments inhibited p47phox expression under hyperglycemic conditions. Conversely, the expression levels of SIRT1, SIRT3, SIRT6, and FOXO3a were decreased under high glucose conditions compared to normal glucose conditions, but exposure to fisetin and luteolin induced the expression of SIRT1, SIRT3, SIRT6, and FOXO3a. The above findings suggest that fisetin and luteolin inhibited high glucose-induced ROS production in monocytes through the activation of SIRTs and FOXO3a. CONCLUSIONS The results of our study supports current researches that state fisetin and luteolin as potential agents for the development of novel strategies for diabetes.
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Affiliation(s)
- Arang Kim
- Department of Food and Nutrition, Chonnam National University, Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Wooje Lee
- National Research Center for Dementia, Chosun University, Gwangju 61452, Korea
| | - Jung-Mi Yun
- Department of Food and Nutrition, Chonnam National University, Yongbong-ro, Buk-gu, Gwangju 61186, Korea
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24
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Kim A, Yun JM. Combination Treatments with Luteolin and Fisetin Enhance Anti-Inflammatory Effects in High Glucose-Treated THP-1 Cells Through Histone Acetyltransferase/Histone Deacetylase Regulation. J Med Food 2017. [DOI: 10.1089/jmf.2017.3968] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Arang Kim
- Department of Food and Nutrition, Chonnam National University, Gwangju, South Korea
| | - Jung-Mi Yun
- Department of Food and Nutrition, Chonnam National University, Gwangju, South Korea
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25
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Gautam J, Ku JM, Regmi SC, Jeong H, Wang Y, Banskota S, Park MH, Nam TG, Jeong BS, Kim JA. Dual Inhibition of NOX2 and Receptor Tyrosine Kinase by BJ-1301 Enhances Anticancer Therapy Efficacy via Suppression of Autocrine-Stimulatory Factors in Lung Cancer. Mol Cancer Ther 2017; 16:2144-2156. [PMID: 28536313 DOI: 10.1158/1535-7163.mct-16-0915] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 04/18/2017] [Accepted: 05/17/2017] [Indexed: 11/16/2022]
Abstract
NADPH oxidase-derived reactive oxygen species (ROS) potentiate receptor tyrosine kinase (RTK) signaling, resulting in enhanced angiogenesis and tumor growth. In this study, we report that BJ-1301, a hybrid of pyridinol and alpha-tocopherol, exerts anticancer effects by dual inhibition of NADPH oxidase and RTK activities in endothelial and lung cancer cells. BJ-1301 suppresses ROS production by blocking translocation of NADPH oxidase cytosolic subunits to the cell membrane, thereby inhibiting activation. The potency of RTK inhibition by BJ-1301 was lower than that of sunitinib (a multi-RTK inhibitor), but the inhibition of downstream signaling pathways (e.g., ROS generation) and subsequent biological changes (e.g., NOX2 induction) by BJ-1301 was superior. Consistently, BJ-1301 inhibited cisplatin-resistant lung cancer cell proliferation more than sunitinib did. In xenograft chick or mouse tumor models, BJ-1301 inhibited lung tumor growth, to an extent greater than that of sunitinib or cisplatin. Treatments with BJ-1301 induced regression of tumor growth, potentially due to downregulation of autocrine-stimulatory ligands for RTKs, such as TGFα and stem cell factor, in tumor tissues. Taken together, the current study demonstrates that BJ-1301 is a promising anticancer drug for the treatment of lung cancer. Mol Cancer Ther; 16(10); 2144-56. ©2017 AACR.
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Affiliation(s)
- Jaya Gautam
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Jin-Mo Ku
- Bio-Center, Gyeonggi Institute of Science and Technology Promotion, Suwon, Republic of Korea
| | | | - Hyunyoung Jeong
- Departments of Pharmacy Practice and Biopharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
| | - Ying Wang
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Suhrid Banskota
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Myo-Hyeon Park
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Tae-Gyu Nam
- Department of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Republic of Korea
| | - Byeong-Seon Jeong
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea.
| | - Jung-Ae Kim
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea.
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The rise, the fall and the renaissance of vitamin E. Arch Biochem Biophys 2016; 595:100-8. [PMID: 27095224 DOI: 10.1016/j.abb.2015.11.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 05/26/2015] [Accepted: 10/14/2015] [Indexed: 12/22/2022]
Abstract
This review deals with the expectations of vitamin E ability of preventing or curing, as a potent antioxidant, alleged oxidative stress based ailments including cardiovascular disease, cancer, neurodegenerative diseases, cataracts, macular degeneration and more. The results obtained with clinical intervention studies have highly restricted the range of effectiveness of this vitamin. At the same time, new non-antioxidant mechanisms have been proposed. The new functions of vitamin E have been shown to affect cell signal transduction and gene expression, both in vitro and in vivo. Phosphorylation of vitamin E, which takes place in vivo, results in a molecule provided with functions that are in part stronger and in part different from those of the non-phosphorylate compound. The in vivo documented functions of vitamin E preventing the vitamin E deficiency ataxia (AVED), slowing down the progression of non-alcoholic steato-hepatitis (NASH), decreasing inflammation and potentiating the immune response are apparently based on these new molecular mechanisms. It should be stressed however that vitamin E, when present at higher concentrations in the body, should exert antioxidant properties to the extent that its chromanol ring is unprotected or un-esterified.
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Villani V, Zucchella C, Cristalli G, Galiè E, Bianco F, Giannarelli D, Carpano S, Spriano G, Pace A. Vitamin E neuroprotection against cisplatin ototoxicity: Preliminary results from a randomized, placebo-controlled trial. Head Neck 2016; 38 Suppl 1:E2118-21. [PMID: 26849799 DOI: 10.1002/hed.24396] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Few studies have investigated the effect of vitamin E in reducing the cisplatin (CDDP)-induced ototoxicity. This study evaluated vitamin E supplementation as a protecting agent against CDDP-induced ototoxicity. METHODS Patients who started CDDP were randomly assigned to receive vitamin E supplementation at 400 mg per day (group 1) or placebo (group 2). Audiograms and evoked brainstem responses were obtained at baseline, and after 1, 2, and 3 months. RESULTS Twenty-three patients affected by solid malignancies were enrolled (13 in group 1 and 10 in group 2). At 1 month, a significant hearing loss in group 2 at both 2000 HZ (right ear: p = .05; left ear: p = .04) and 8000 HZ (right ear: p = .04; left ear: p = .03) was detected when compared to baseline values. Audiograms did not show significant changes. At 1 month, evoked brainstem responses remained unchanged in both arms without significant differences between groups. CONCLUSION These preliminary findings confirm the neuroprotective properties of vitamin E against the CDDP-induced ototoxicity. © 2016 Wiley Periodicals, Inc. Head Neck 38: E2118-E2121, 2016.
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Affiliation(s)
| | | | - Giovanni Cristalli
- Department of Otolaryngology, Regina Elena National Cancer Institute, Rome, Italy
| | - Edvina Galiè
- Neuro-Oncology Unit, Regina Elena Cancer Institute, Rome, Italy
| | - Francesco Bianco
- Department of Otolaryngology, Regina Elena National Cancer Institute, Rome, Italy
| | | | - Silvia Carpano
- Department of Oncology, Regina Elena National Cancer Institute, Rome, Italy
| | - Giuseppe Spriano
- Department of Otolaryngology, Regina Elena National Cancer Institute, Rome, Italy
| | - Andrea Pace
- Neuro-Oncology Unit, Regina Elena Cancer Institute, Rome, Italy
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Bronsart LL, Stokes C, Contag CH. Chemiluminescence Imaging of Superoxide Anion Detects Beta-Cell Function and Mass. PLoS One 2016; 11:e0146601. [PMID: 26752052 PMCID: PMC4709142 DOI: 10.1371/journal.pone.0146601] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 12/18/2015] [Indexed: 12/21/2022] Open
Abstract
Superoxide anion is produced during normal cellular respiration and plays key roles in cellular physiology with its dysregulation being associated with a variety of diseases. Superoxide anion is a short-lived molecule and, therefore, its homeostatic regulation and role in biology and disease requires dynamic quantification with fine temporal resolution. Here we validated coelenterazine as a reporter of intracellular superoxide anion concentration and used it as a dynamic measure both in vitro and in vivo. Chemiluminescence was dependent upon superoxide anion levels, including those produced during cellular respiration, and concentrations varied both kinetically and temporally in response to physiologically relevant fluctuations in glucose levels. In vivo imaging with coelenterazine revealed that beta cells of the pancreas have increased levels of superoxide anion, which acted as a measure of beta-cell function and mass and could predict the susceptibility of mice to diabetes mellitus. Glucose response and regulation are key elements of cellular physiology and organismal biology, and superoxide anion appears to play a fundamental and dynamic role in both of these processes.
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Affiliation(s)
- Laura L. Bronsart
- Department of Biology, Stanford University, 318 Campus Drive, Stanford, California 94305, United States of America
- Department of Pediatrics, Stanford University, 318 Campus Drive, Stanford, California 94305, United States of America
| | - Christian Stokes
- Department of Pediatrics, Stanford University, 318 Campus Drive, Stanford, California 94305, United States of America
| | - Christopher H. Contag
- Department of Pediatrics, Stanford University, 318 Campus Drive, Stanford, California 94305, United States of America
- Departments of Radiology, Microbiology & Immunology, Stanford University, 318 Campus Drive, Stanford, California 94305, United States of America
- * E-mail:
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Kuzmenko D, Udintsev S, Klimentyeva T, Serebrov V. Oxidative stress in adipose tissue as a primary link in pathogenesis of insulin resistance. ACTA ACUST UNITED AC 2016; 62:14-21. [DOI: 10.18097/pbmc20166201014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Obesity is a leading risk factor of diabetes mellitus type 2, impairments of lipid metabolism and cardiovascular diseases. Dysfunctions of the accumulating weight of the visceral fat are primarily linked to pathogenesis of systemic insulin resistance. The review considers modern views about biochemical mechanisms underlying formation of oxidative stress in adipocytes at obesity, as one of key elements of impairments of their metabolism triggering formation of systemic insulin resistance.
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Molecular Pathways Regulating Macrovascular Pathology and Vascular Smooth Muscle Cells Phenotype in Type 2 Diabetes. Int J Mol Sci 2015; 16:24353-68. [PMID: 26473856 PMCID: PMC4632754 DOI: 10.3390/ijms161024353] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 09/21/2015] [Accepted: 10/08/2015] [Indexed: 12/30/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is a disease reaching a pandemic proportion in developed countries and a major risk factor for almost all cardiovascular diseases and their adverse clinical manifestations. T2DM leads to several macrovascular and microvascular alterations that influence the progression of cardiovascular diseases. Vascular smooth muscle cells (VSMCs) are fundamental players in macrovascular alterations of T2DM patients. VSMCs display phenotypic and functional alterations that reflect an altered intracellular biomolecular scenario of great vessels of T2DM patients. Hyperglycemia itself and through intraparietal accumulation of advanced glycation-end products (AGEs) activate different pathways, in particular nuclear factor-κB and MAPKs, while insulin and insulin growth-factor receptors (IGFR) are implicated in the activation of Akt and extracellular-signal-regulated kinases (ERK) 1/2. Nuclear factor-κB is also responsible of increased susceptibility of VSMCs to pro-apoptotic stimuli. Down-regulation of insulin growth-factor 1 receptors (IGFR-1R) activity in diabetic vessels also influences negatively miR-133a levels, so increasing apoptotic susceptibility of VSMCs. Alterations of those bimolecular pathways and related genes associate to the prevalence of a synthetic phenotype of VSMCs induces extracellular matrix alterations of great vessels. A better knowledge of those biomolecular pathways and related genes in VSMCs will help to understand the mechanisms leading to macrovascular alterations in T2DM patients and to suggest new targeted therapies.
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Riebel M, Sabel A, Claus H, Fronk P, Xia N, Li H, König H, Decker H. Influence of Laccase and Tyrosinase on the Antioxidant Capacity of Selected Phenolic Compounds on Human Cell Lines. Molecules 2015; 20:17194-207. [PMID: 26393557 PMCID: PMC6332179 DOI: 10.3390/molecules200917194] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/25/2015] [Accepted: 09/11/2015] [Indexed: 11/17/2022] Open
Abstract
Polyphenolic compounds affect the color, odor and taste of numerous food products of plant origin. In addition to the visual and gustatory properties, they serve as radical scavengers and have antioxidant effects. Polyphenols, especially resveratrol in red wine, have gained increasing scientific and public interest due to their presumptive beneficial impact on human health. Enzymatic oxidation of phenolic compounds takes place under the influence of polyphenol oxidases (PPO), including tyrosinase and laccase. Several studies have demonstrated the radical scavenger effect of plants, food products and individual polyphenols in vitro, but, apart from resveratrol, such impact has not been proved in physiological test systems. Furthermore, only a few data exist on the antioxidant capacities of the enzymatic oxidation products of phenolic compounds generated by PPO. We report here first results about the antioxidant effects of phenolic substances, before and after oxidation by fungal model tyrosinase and laccase. In general, the common chemical 2,2-diphenyl-1-picrylhydrazyl assay and the biological tests using two different types of cell cultures (monocytes and endothelial cells) delivered similar results. The phenols tested showed significant differences with respect to their antioxidant activity in all test systems. Their antioxidant capacities after enzymatic conversion decreased or increased depending on the individual PPO used.
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Affiliation(s)
- Matthias Riebel
- Institute for Molecular Biophysics, Johannes Gutenberg University of Mainz, Jakob-Welder-Weg, 26, 55128 Mainz, Germany.
| | - Andrea Sabel
- Institute for Microbiology and Wine Research, Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg, 15, 55128 Mainz, Germany.
| | - Harald Claus
- Institute for Microbiology and Wine Research, Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg, 15, 55128 Mainz, Germany.
| | - Petra Fronk
- Institute for Molecular Biophysics, Johannes Gutenberg University of Mainz, Jakob-Welder-Weg, 26, 55128 Mainz, Germany.
| | - Ning Xia
- Department of Pharmacology, Johannes Gutenberg University Medical Center of Mainz, Obere Zahlbacher Str. 67, 55131 Mainz, Germany.
| | - Huige Li
- Department of Pharmacology, Johannes Gutenberg University Medical Center of Mainz, Obere Zahlbacher Str. 67, 55131 Mainz, Germany.
| | - Helmut König
- Institute for Microbiology and Wine Research, Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg, 15, 55128 Mainz, Germany.
| | - Heinz Decker
- Institute for Molecular Biophysics, Johannes Gutenberg University of Mainz, Jakob-Welder-Weg, 26, 55128 Mainz, Germany.
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Vorobjeva NV, Pinegin BV. Effects of the antioxidants Trolox, Tiron and Tempol on neutrophil extracellular trap formation. Immunobiology 2015; 221:208-19. [PMID: 26371849 DOI: 10.1016/j.imbio.2015.09.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/16/2015] [Accepted: 09/04/2015] [Indexed: 02/01/2023]
Abstract
Neutrophils can entrap and kill pathogens by releasing of neutrophil extracellular traps (NETs), in addition to their routine functions such as phagocytosis and degranulation. NETs consist of a DNA backbone supplemented by multiple bactericidal proteins from the nucleus, the cytoplasm and the granules. Neutrophils release NETs after their activation by a number of physiological and pharmacological stimuli. In addition to the antimicrobial function, NETs are involved in the pathogenesis of various autoimmune and inflammatory diseases. Since NET formation predominantly depends on the generation of reactive oxygen species (ROS), all substances that are capable of scavenging ROS or inhibiting the enzymes responsible for their synthesis should prevent ROS-associated NET release. The aim of this study was to test substances with an antioxidant activity, such as Trolox, Tiron, and Tempol, for their capacity to inhibit NET formation by primary human neutrophils in vitro. We revealed for the first time an inhibitory effect of Trolox on ROS-dependent NET release. We also established a suppressive effect of Tempol on NET formation that manifested itself in a wide range of concentrations. In this study, no inhibitory influence of Tiron on NET release was revealed. All tested substances exerted a significant dose-dependent antioxidative effect on ROS generation induced by phorbol 12-myristate 13-acetate (PMA). We suggest that the antioxidants Trolox and Tempol should be recommended for treating autoimmune and inflammatory diseases that implicate ROS-dependent NET release.
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Affiliation(s)
- Nina V Vorobjeva
- Biology Faculty, Lomonosov Moscow State University, Lenin Hills 1/12, 119991 Moscow, Russia.
| | - Boris V Pinegin
- Institute of Immunology, Federal Medical Biological Agency, Kashirskoe Shosse 24/2, 115478 Moscow, Russia.
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Affiliation(s)
- Jean-Marc Zingg
- Department of Biochemistry and Molecular Biology, University of Miami, Miami, Florida 33136-6129;
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Saboori S, Shab-Bidar S, Speakman JR, Yousefi Rad E, Djafarian K. Effect of vitamin E supplementation on serum C-reactive protein level: a meta-analysis of randomized controlled trials. Eur J Clin Nutr 2015; 69:867-73. [DOI: 10.1038/ejcn.2014.296] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 11/22/2014] [Accepted: 12/06/2014] [Indexed: 01/07/2023]
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Chang WC, Wu SC, Xu KD, Liao BC, Wu JF, Cheng AS. Scopoletin protects against methylglyoxal-induced hyperglycemia and insulin resistance mediated by suppression of advanced glycation endproducts (AGEs) generation and anti-glycation. Molecules 2015; 20:2786-801. [PMID: 25671364 PMCID: PMC6272799 DOI: 10.3390/molecules20022786] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 02/03/2015] [Indexed: 12/13/2022] Open
Abstract
Recently, several types of foods and drinks, including coffee, cream, and cake, have been found to result in high methylglyoxal (MG) levels in the plasma, thus causing both nutritional and health concerns. MG can be metabolized by phase-II enzymes in liver through the positive regulation of nuclear factor-erythroid 2-related factor 2 (Nrf2). In this study, we investigated the ability of scopoletin (SP) to protect against MG-induced hyperglycemia and insulin resistance. Recently, SP was shown to be a peroxisome proliferator-activated receptor-γ activator to elevate insulin sensitivity. We investigated the effects of oral administration of SP on the metabolic, biochemical, and molecular abnormalities characteristic of type 2 diabetes in MG-treated Wistar rats to understand the potential mechanism of scopoletin for diabetes protection. Our results suggested that SP activated Nrf2 by Ser40 phosphorylation, resulting in the metabolism of MG into d-lactic acid and the inhibition of AGEs generation, which reduced the accumulation of AGEs in the livers of MG-induced rats. In this manner, SP improved the results of the oral glucose tolerance test and dyslipidemia. Moreover, SP also increased the plasma translocation of glucose transporter-2 and promoted Akt phosphorylation caused by insulin treatment in MG-treated FL83B hepatocytes. In contrast, SP effectively suppressed protein tyrosine phosphatase 1B (PTP1B) expression, thereby alleviating insulin resistance. These findings suggest that SP acts as an anti-glycation and anti-diabetic agent, and thus has therapeutic potential for the prevention of diabetes.
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Affiliation(s)
- Wen-Chang Chang
- Department of Medicinal Plant Development, Yupintang Traditional Chinese Medicine Foundation, 4F., No.2, Ln. 138, Yongyuan Rd., Yonghe Dist., New Taipei City 234, Taiwan.
| | - Shinn-Chih Wu
- Department of Animal Science and Technology, National Taiwan University, 59 Roosevelt Road Section 4, Taipei 10617, Taiwan.
| | - Kun-Di Xu
- Department of Medicinal Plant Development, Yupintang Traditional Chinese Medicine Foundation, 4F., No.2, Ln. 138, Yongyuan Rd., Yonghe Dist., New Taipei City 234, Taiwan.
| | - Bo-Chieh Liao
- Department of Medicinal Plant Development, Yupintang Traditional Chinese Medicine Foundation, 4F., No.2, Ln. 138, Yongyuan Rd., Yonghe Dist., New Taipei City 234, Taiwan.
| | - Jia-Feng Wu
- Department of Medicinal Plant Development, Yupintang Traditional Chinese Medicine Foundation, 4F., No.2, Ln. 138, Yongyuan Rd., Yonghe Dist., New Taipei City 234, Taiwan.
| | - An-Sheng Cheng
- Department of Medicinal Plant Development, Yupintang Traditional Chinese Medicine Foundation, 4F., No.2, Ln. 138, Yongyuan Rd., Yonghe Dist., New Taipei City 234, Taiwan.
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Inzaugarat ME, Billordo LA, Vodánovich F, Cervini GM, Casavalle PL, Vedire C, Cherñavsky AC. Alterations in innate and adaptive immune leukocytes are involved in paediatric obesity. Pediatr Obes 2014; 9:381-90. [PMID: 23852831 DOI: 10.1111/j.2047-6310.2013.00179.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 03/26/2013] [Accepted: 04/12/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Adipose tissue is the main source of the cytokines and adipokines that are increased in the context of obesity. The production of reactive oxygen species (ROS) and cytokines by circulating immune cells can be regulated by these pro-inflammatory factors even before infiltration into adipose tissue. OBJECTIVE To investigate the alterations that can occur in circulating monocytes and lymphocytes in paediatric obesity. METHODS In this study, 54 paediatric obese patients and 30 age-matched metabolically healthy individuals were enrolled. Intracellular cytokines were analyzed after phorbol myristate acetate (PMA) or leptin plus PMA stimulation of lymphocytes and monocytes by flow cytometry. ROS generation was measured using dichlorofluorescein-diacetate. Both a 'stimulation index' and a 'fold of increase' were calculated for statistical purposes. RESULTS Both interferon gamma (IFN-γ) production by circulating CD4+ and CD8+ lymphocytes and ROS production by monocytes following PMA stimulation were increased in obese patients. Leptin induced an increased production of IFN-γ in both subsets of T cells and tumour necrosis factor alpha in monocytes, and linoleic acid induced a higher ROS production in monocytes. CONCLUSIONS The distinct functional responses of circulating cells suggest that alterations in both innate and adaptive immune cells are involved in the maintenance of low-grade inflammation in paediatric obesity.
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Affiliation(s)
- M E Inzaugarat
- Instituto de Inmunología, Genética y Metabolismo, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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NADPH oxidase as a therapeutic target for oxalate induced injury in kidneys. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:462361. [PMID: 23840917 PMCID: PMC3690252 DOI: 10.1155/2013/462361] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 05/14/2013] [Indexed: 02/07/2023]
Abstract
A major role of the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase family of enzymes is to catalyze the production of superoxides and other reactive oxygen species (ROS). These ROS, in turn, play a key role as messengers in cell signal transduction and cell cycling, but when they are produced in excess they can lead to oxidative stress (OS). Oxidative stress in the kidneys is now considered a major cause of renal injury and inflammation, giving rise to a variety of pathological disorders. In this review, we discuss the putative role of oxalate in producing oxidative stress via the production of reactive oxygen species by isoforms of NADPH oxidases expressed in different cellular locations of the kidneys. Most renal cells produce ROS, and recent data indicate a direct correlation between upregulated gene expressions of NADPH oxidase, ROS, and inflammation. Renal tissue expression of multiple NADPH oxidase isoforms most likely will impact the future use of different antioxidants and NADPH oxidase inhibitors to minimize OS and renal tissue injury in hyperoxaluria-induced kidney stone disease.
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Lee BH, Hsu WH, Huang T, Chang YY, Hsu YW, Pan TM. Effects of monascin on anti-inflammation mediated by Nrf2 activation in advanced glycation end product-treated THP-1 monocytes and methylglyoxal-treated wistar rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:1288-1298. [PMID: 23331247 DOI: 10.1021/jf305067n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Hyperglycemia is associated with advanced glycation end products (AGEs). This study was designed to evaluate the inhibitory effects of monascin on receptor for advanced glycation end product (RAGE) signal and THP-1 monocyte inflammation after treatment with S100b, a specific ligand of RAGE. Monascin inhibited cytokine production by S100b-treated THP-1 monocytes via up-regulation of nuclear factor-erythroid 2-related factor-2 (Nrf2) and alleviated p47phox translocation to the membrane. Methylglyoxal (MG, 600 mg/kg bw) was used to induce diabetes in Wistar rats. Inhibitions of RAGE and p47phox by monascin were confirmed by peripheral blood mononuclear cells (PBMCs) of MG-induced rats. Silymarin (SM) was used as a positive control group. It was found that monascin promoted heme oxygenase-1 (HO-1) expression mediated by Nrf2. Suppressions of AGEs, tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-β) in serum of MG-induced rats were attenuated in the monascin administration group treated with retinoic acid (RA). RA treatment resulted in Nrf2 inactivation by increasing RA receptor-α (RARα) activity, suggesting that RA acts as an inhibitor of Nrf2. The results showed that monascin exerted anti-inflammatory and antioxidative effects mediated by Nrf2 to prevent the development of diseases such as type 2 diabetes caused by inflammation.
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Affiliation(s)
- Bao-Hong Lee
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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Jialal I, Kaur H, Devaraj S. Human C-reactive protein accentuates macrophage activity in biobreeding diabetic rats. J Diabetes Complications 2013; 27:23-8. [PMID: 22520400 PMCID: PMC3404262 DOI: 10.1016/j.jdiacomp.2012.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 03/13/2012] [Accepted: 03/15/2012] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Type 1 diabetes (T1DM) is a pro-inflammatory state characterized by high C-reactive protein (CRP) levels. However, there is a paucity of data examining the role of CRP in promoting the pro-inflammatory state of diabetes. Thus, we examined the pro-inflammatory effects of human CRP using spontaneously diabetic bio-breeding (BB) rats. METHODS Diabetic rats (n=9/group) were injected with Human serum albumin (huSA) or Human CRP (hCRP, 20 mg/kg body weight; i.p.) for 3 consecutive days. Blood and peritoneal macrophages (MØ) were obtained following euthanasia. Peritoneal macrophages were used for measuring superoxide anion release, NF-κB DNA binding activity, proinflammatory mediator secretion. RESULTS hCRP administration resulted in significantly increased superoxide anion production, along with increased release of cytokines/chemokines, and plasminogen activator inhibitor (PAI-1) and Tissue Factor (TF) activity in diabetic rats compared to huSA. hCRP-treated BB rat MØ showed significant induction of protein kinase C (PKC)-alpha, PKC-delta and p47 phox expression and NF-κB compared to huSA. CONCLUSIONS Thus, our data suggest that human CRP exacerbates in-vivo the pro-inflammatory, pro-oxidant and procoagulant states of diabetes predominantly via increased macrophage activity and this could have implications with respect to vascular complications and anti-inflammatory therapies.
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Affiliation(s)
- Ishwarlal Jialal
- Laboratory of Atherosclerosis and Metabolic Research, Department of Pathology and Laboratory Medicine, University of California at Davis, Sacramento, CA, USA.
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Kaplan M, Aviram M, Hayek T. Oxidative stress and macrophage foam cell formation during diabetes mellitus‐induced atherogenesis: Role of insulin therapy. Pharmacol Ther 2012; 136:175-85. [DOI: 10.1016/j.pharmthera.2012.08.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 07/10/2012] [Indexed: 01/04/2023]
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Abstract
Amaranth grain is a highly nutritional pseudocereal with a superior amount of proteins when compared to true cereals. It is a reasonably well-balanced food with functional properties that have been shown to provide medicinal benefits. The health benefits attributed include decreasing plasma cholesterol levels, stimulating the immune system, exerting an antitumor activity, reducing blood glucose levels and improving conditions of hypertension and anemia. In addition, it has been reported to possess anti-allergic and antioxidant activities. The present article provides a comprehensive overview of amaranth grain that focuses on recent research reporting its use in the clinical practice and its possible benefits to human health.
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Animal models as tools to investigate antidiabetic and anti-inflammatory plants. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:142087. [PMID: 22899950 PMCID: PMC3414199 DOI: 10.1155/2012/142087] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 05/30/2012] [Indexed: 01/12/2023]
Abstract
Plants have been historically used for diabetes treatment and related anti-inflammatory activity throughout the world; few of them have been validated by scientific criteria. Recently, a large diversity of animal models has been developed for better understanding the pathogenesis of diabetes mellitus and its underlying inflammatory mechanism and new drugs have been introduced in the market to treat this disease. The aim of this work is to review the available animal models of diabetes and anti-inflammatory activity along with some in vitro models which have been used as tools to investigate the mechanism of action of drugs with potential antidiabetic properties and related anti-inflammatory mechanism. At present, the rigorous procedures for evaluation of conventional antidiabetic medicines have rarely been applied to test raw plant materials used as traditional treatments for diabetes; and natural products, mainly derived from plants, have been tested in chemically induced diabetes model. This paper contributes to design new strategies for the development of novel antidiabetic drugs and its related inflammatory activity in order to treat this serious condition which represents a global public health problem.
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Abdala-Valencia H, Berdnikovs S, Cook-Mills JM. Vitamin E isoforms differentially regulate intercellular adhesion molecule-1 activation of PKCα in human microvascular endothelial cells. PLoS One 2012; 7:e41054. [PMID: 22815910 PMCID: PMC3398863 DOI: 10.1371/journal.pone.0041054] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 06/18/2012] [Indexed: 01/27/2023] Open
Abstract
Aims ICAM-1-dependent leukocyte recruitment in vivo is inhibited by the vitamin E isoform d-α-tocopherol and elevated by d-γ-tocopherol. ICAM-1 is reported to activate endothelial cell signals including protein kinase C (PKC), but the PKC isoform and the mechanism for ICAM-1 activation of PKC are not known. It is also not known whether ICAM-1 signaling in endothelial cells is regulated by tocopherol isoforms. We hypothesized that d-α-tocopherol and d-γ-tocopherol differentially regulate ICAM-1 activation of endothelial cell PKC. Results ICAM-1 crosslinking activated the PKC isoform PKCα but not PKCβ in TNFα-pretreated human microvascular endothelial cells. ICAM-1 activation of PKCα was blocked by the PLC inhibitor U73122, ERK1/2 inhibitor PD98059, and xanthine oxidase inhibitor allopurinol. ERK1/2 activation was blocked by inhibition of XO and PLC but not by inhibition of PKCα, indicating that ERK1/2 is downstream of XO and upstream of PKCα during ICAM-1 signaling. During ICAM-1 activation of PKCα, the XO-generated ROS did not oxidize PKCα. Interestingly, d-α-tocopherol inhibited ICAM-1 activation of PKCα but not the upstream signal ERK1/2. The d-α-tocopherol inhibition of PKCα was ablated by the addition of d-γ-tocopherol. Conclusions Crosslinking ICAM-1 stimulated XO/ROS which activated ERK1/2 that then activated PKCα. ICAM-1 activation of PKCα was inhibited by d-α-tocopherol and this inhibition was ablated by the addition of d-γ-tocopherol. These tocopherols regulated ICAM-1 activation of PKCα without altering the upstream signal ERK1/2. Thus, we identified a mechanism for ICAM-1 activation of PKC and determined that d-α-tocopherol and d-γ-tocopherol have opposing regulatory functions for ICAM-1-activated PKCα in endothelial cells.
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Affiliation(s)
- Hiam Abdala-Valencia
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Sergejs Berdnikovs
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Joan M. Cook-Mills
- Allergy-Immunology Division, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
- * E-mail:
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Yun JM, Chien A, Jialal I, Devaraj S. Resveratrol up-regulates SIRT1 and inhibits cellular oxidative stress in the diabetic milieu: mechanistic insights. J Nutr Biochem 2012; 23:699-705. [PMID: 21813271 PMCID: PMC3209497 DOI: 10.1016/j.jnutbio.2011.03.012] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 02/09/2011] [Accepted: 03/16/2011] [Indexed: 12/15/2022]
Abstract
Several lines of evidence support a role for oxidative stress in diabetic complications. Diabetic patients have increased O(2)(-) production in monocytes. Loss of SIRT1 activity may be associated with metabolic diseases such as diabetes. Several studies have shown that SIRT1 can regulate mammalian FOXO transcription factors through direct binding and/or deacetylation. However, interactions between SIRT1 and FOXO under diabetic conditions are unclear. The phytochemical resveratrol has recently gained attention for its protection against metabolic disease. Resveratrol has been shown to increase mitochondrial function by activating SIRT1. In this study, we tested the protective effect of resveratrol on cellular oxidative stress through the SIRT1-FOXO pathway under high-glucose conditions. Human monocytic (THP-1) cells were cultured in the presence of mannitol (osmolar control) or normoglycemic (NG, 5.5 mmol/l glucose) or hyperglycemic (HG, 25 mmol/l glucose) conditions in absence or presence of resveratrol (3 and 6 μmol/l) for 48 h. We first examined SIRT1 activity and oxidative stress in monocytes of Type 1 diabetes mellitus (T1DM) patients compared with healthy controls. In T1DM patients, monocytic SIRT1 expression was significantly decreased and p47phox expression was increased compared with controls. Under HG in vitro, SIRT1 and FOXO3a were significantly decreased compared with NG, and this was reversed by resveratrol treatment, concomitant with reduction in HG-induced superoxide production and p47phox. Under HG, SIRT1 small interfering RNA (siRNA) inhibited FOXO3a, and there was no beneficial effect of resveratrol in siRNA-treated HG-induced cells. Thus, resveratrol decreases HG-induced superoxide production via up-regulation of SIRT1, induction of FOXO3a and inhibition of p47phox in monocytes.
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Affiliation(s)
- Jung-Mi Yun
- Department of Pathology and Laboratory Medicine, University of California, Davis, Medical Center, Sacramento, USA
| | - Alexander Chien
- Department of Pathology and Laboratory Medicine, University of California, Davis, Medical Center, Sacramento, USA
| | - Ishwarlal Jialal
- Department of Pathology and Laboratory Medicine, University of California, Davis, Medical Center, Sacramento, USA
| | - Sridevi Devaraj
- Department of Pathology and Laboratory Medicine, University of California, Davis, Medical Center, Sacramento, USA
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The NADPH oxidase family and its inhibitors. Arch Immunol Ther Exp (Warsz) 2012; 60:277-94. [PMID: 22696046 DOI: 10.1007/s00005-012-0176-z] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 03/27/2012] [Indexed: 12/16/2022]
Abstract
The classical nicotinamide adenine dinucleotide phosphate (NADPH) oxidase was originally detected in neutrophils as a multicomponent enzyme that catalyzes the generation of superoxide from oxygen and the reduced form of NADPH. This enzyme is composed of two membrane-bound subunits (p22phox and gp91phox), three cytosolic subunits (p67phox, p47phox, and p40phox) and a small G-protein Rac (Rac1 and Rac2). Recently, it has been demonstrated that there are several isoforms of nonphagocytic NADPH oxidase. Endothelial cells, vascular smooth muscle cells or adventitial fibroblasts possess multiple isoforms of this enzyme. The new homologs, along with gp91phox are now designated the Nox family of NADPH oxidases and are key sources of reactive oxygen species in the vasculature. Reactive oxygen species play a significant role in regulating endothelial function and vascular tone. However, besides the participation in the processes of physiological cell, these enzymes can also be the perpetrator of oxidative stress that causes endothelial dysfunction. This review summarizes the current state of knowledge of the structure and functions of NADPH oxidase and NADPH oxidase inhibitors in the treatment of disorders with endothelial damage.
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46
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Vitamin E isoforms directly bind PKCα and differentially regulate activation of PKCα. Biochem J 2012; 441:189-98. [PMID: 21933153 DOI: 10.1042/bj20111318] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Vitamin E isoforms have opposing regulatory effects on leucocyte recruitment during inflammation. Furthermore, in vitro, vitamin E isoforms have opposing effects on leucocyte migration across endothelial cells by regulating VCAM (vascular cell-adhesion molecule)-1 activation of endothelial cell PKCα (protein kinase Cα). However, it is not known whether tocopherols directly regulate cofactor-dependent or oxidative activation of PKCα. We report in the present paper that cofactor-dependent activation of recombinant PKCα was increased by γ-tocopherol and was inhibited by α-tocopherol. Oxidative activation of PKCα was inhibited by α-tocopherol at a 10-fold lower concentration than γ-tocopherol. In binding studies, NBD (7-nitrobenz-2-oxa-1,3-diazole)-tagged α-tocopherol directly bound to full-length PKCα or the PKCα-C1a domain, but not PKCζ. NBD-tagged α-tocopherol binding to PKCα or the PKCα-C1a domain was blocked by diacylglycerol, α-tocopherol, γ-tocopherol and retinol, but not by cholesterol or PS (phosphatidylserine). Tocopherols enhanced PKCα-C2 domain binding to PS-containing lipid vesicles. In contrast, the PKCα-C2 domain did not bind to lipid vesicles containing tocopherol without PS. The PKCα-C1b domain did not bind to vesicles containing tocopherol and PS. In summary, α-tocopherol and γ-tocopherol bind the diacylglycerol-binding site on PKCα-C1a and can enhance PKCα-C2 binding to PS-containing vesicles. Thus the tocopherols can function as agonists or antagonists for differential regulation of PKCα.
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Abstract
Diabetes is a mutifactorial metabolic disorder that leads to a number of complications. Diabetes is estimated to affect 36 million people in the U.S.A., and the prevalence of diagnosed and undiagnosed diabetes is at 9.3% and continues to rise. Evidence from experimental animal models as well as humans has indicated that systemic inflammation plays a role in the pathophysiological processes of diabetes and is facilitated by innate immune responses. TLRs (Toll-like receptors) are key innate immune receptors that recognize conserved PAMPs (pathogen-associated molecular patterns), induce inflammatory responses essential for host defences and initiate an adaptive immune response. Although TLR expression is increased in a plethora of inflammatory disorders, the effects of metabolic aberrations on TLRs and their role in diabetes and its complications is still emerging. In the present paper, we provide a systematic review on how TLRs play a detrimental role in the pathogenic processes [increased blood sugar, NEFAs (non-esterified 'free' fatty acids), cytokines and ROS (reactive oxygen species)] that manifest diabetes. Furthermore, we will highlight some of the therapeutic strategies targeted at decreasing TLRs to abrogate inflammation in diabetes that may eventually result in decreased complications.
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Bryland A, Wieslander A, Carlsson O, Hellmark T, Godaly G. Citrate treatment reduces endothelial death and inflammation under hyperglycaemic conditions. Diab Vasc Dis Res 2012; 9:42-51. [PMID: 22045866 PMCID: PMC3267553 DOI: 10.1177/1479164111424297] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Hyperglycaemia and glucose degradation products (GDPs) are closely associated with oxidative stress and inflammation in diabetic patients, a condition that leads to endothelial dysfunction and cardiovascular problems. We evaluated the effect of citrate and gluconate on glucose- and GDP-induced endothelial inflammation by measuring changes in viability, inflammation and function in primary human umbilical vein endothelial cells (HUVECs). The extent of apoptosis/necrosis was measured by flow cytometry and visualised with confocal microscopy by staining with annexin V or propidium iodide, respectively. Protein kinase C-βII (PKC-βII) activation was evaluated with Western blotting. Incubation with glucose (30 mM) and GDP (50 µM) significantly increased PKC-βII expression, endothelial cell death and inflammation. The addition of citrate decreased hyperglycaemia-induced apoptosis (p = 0.021), necrosis (p = 0.04) and reduced PKC-βII expression (p = 0.021) down to background levels. Citrate improved endothelial function by reducing the inflammatory markers (p = 0.01) and by decreasing neutrophil diapedesis (p = 0.012). These results suggest that citrate may have therapeutic potential by reducing hyperglycaemia-induced endothelial inflammation and abolishing endothelial dysfunction.
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Affiliation(s)
- Anna Bryland
- Department of Nephrology, Lund University, Lund, Sweden
| | | | - Ola Carlsson
- Department of Nephrology, Lund University, Lund, Sweden
| | | | - Gabriela Godaly
- Department of Microbiology, Immunology and Glycobiology, Lund University, Lund, Sweden
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Ibuki A, Akase T, Nagase T, Minematsu T, Nakagami G, Horii M, Sagara H, Komeda T, Kobayashi M, Shimada T, Aburada M, Yoshimura K, Sugama J, Sanada H. Skin fragility in obese diabetic mice: possible involvement of elevated oxidative stress and upregulation of matrix metalloproteinases. Exp Dermatol 2011; 21:178-83. [DOI: 10.1111/j.1600-0625.2011.01409.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Tundis R, Loizzo MR, Menichini F, Bonesi M, Conforti F, Statti G, De Luca D, de Cindio B, Menichini F. Comparative study on the chemical composition, antioxidant properties and hypoglycaemic activities of two Capsicum annuum L. cultivars (Acuminatum small and Cerasiferum). PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2011; 66:261-269. [PMID: 21792679 DOI: 10.1007/s11130-011-0248-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present study aimed to evaluate for the first time the phenols, flavonoids, carotenoids, capsaicin and dihydrocapsaicin content and the antioxidant and hypoglycemic properties of Capsicum annuum var. acuminatum small and C. annuum var. cerasiferum air-dried fruits. The ethanol extract of C. annuum var. acuminatum small, characterized by the major content of total poliphenols, flavonoids, carotenoids and capsaicinoids, showed the highest radical scavenging activity (IC(50) of 152.9 μg/ml). On the contrary, C. annuum var. cerasiferum showed a significant antioxidant activity evaluated by the β-carotene bleaching test (IC(50) of 3.1 μg/ml). The lipophilic fraction of both C. annuum var. acuminatum and C. annuum var. cerasiferum exhibited an interesting and selective inhibitory activity against α-amylase (IC(50) of 6.9 and 20.1 μg/ml, respectively).
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Affiliation(s)
- Rosa Tundis
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Nutrition and Health Sciences, University of Calabria, Rende, CS, Italy.
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