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Akyol O, Akyol S, Chou MC, Chen S, Liu CK, Selek S, Soares JC, Chen CH. Lipids and lipoproteins may play a role in the neuropathology of Alzheimer's disease. Front Neurosci 2023; 17:1275932. [PMID: 38033552 PMCID: PMC10687420 DOI: 10.3389/fnins.2023.1275932] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
Alzheimer's disease (AD) and other classes of dementia are important public health problems with overwhelming social, physical, and financial effects for patients, society, and their families and caregivers. The pathophysiology of AD is poorly understood despite the extensive number of clinical and experimental studies. The brain's lipid-rich composition is linked to disturbances in lipid homeostasis, often associated with glucose and lipid abnormalities in various neurodegenerative diseases, including AD. Moreover, elevated low-density lipoprotein (LDL) cholesterol levels may be related to a higher probability of AD. Here, we hypothesize that lipids, and electronegative LDL (L5) in particular, may be involved in the pathophysiology of AD. Although changes in cholesterol, triglyceride, LDL, and glucose levels are seen in AD, the cause remains unknown. We believe that L5-the most electronegative subfraction of LDL-may be a crucial factor in understanding the involvement of lipids in AD pathology. LDL and L5 are internalized by cells through different receptors and mechanisms that trigger separate intracellular pathways. One of the receptors involved in L5 internalization, LOX-1, triggers apoptotic pathways. Aging is associated with dysregulation of lipid homeostasis, and it is believed that alterations in lipid metabolism contribute to the pathogenesis of AD. Proposed mechanisms of lipid dysregulation in AD include mitochondrial dysfunction, blood-brain barrier disease, neuronal signaling, inflammation, and oxidative stress, all of which lead ultimately to memory loss through deficiency of synaptic integration. Several lipid species and their receptors have essential functions in AD pathogenesis and may be potential biomarkers.
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Affiliation(s)
- Omer Akyol
- Molecular Cardiology, Vascular and Medicinal Research, The Texas Heart Institute, Houston, TX, United States
| | | | - Mei-Chuan Chou
- Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shioulan Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ching-Kuan Liu
- Institute of Precision Medicine, College of Medicine, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Salih Selek
- Department of Psychiatry and Behavioral Sciences, UTHealth Houston McGovern Medical School, Houston, TX, United States
| | - Jair C. Soares
- Department of Psychiatry and Behavioral Sciences, UTHealth Houston McGovern Medical School, Houston, TX, United States
| | - Chu-Huang Chen
- Molecular Cardiology, Vascular and Medicinal Research, The Texas Heart Institute, Houston, TX, United States
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2
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Beers DR, Thonhoff JR, Faridar A, Thome AD, Zhao W, Wen S, Appel SH. Tregs Attenuate Peripheral Oxidative Stress and Acute Phase Proteins in ALS. Ann Neurol 2022; 92:195-200. [PMID: 35445431 PMCID: PMC9545429 DOI: 10.1002/ana.26375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 11/27/2022]
Abstract
Oxidative stress (OS) induces inflammation, which in turn exacerbates OS and the expression of acute phase proteins (APPs). Regulatory T lymphocyte (Treg) therapy was assessed for suppression of OS and APP responses in longitudinal serum samples from subjects with amyotrophic lateral sclerosis (ALS) enrolled in a phase I clinical trial. The first round of Treg therapy suppressed levels of oxidized low‐density lipoprotein (ox‐LDL). During a 6‐month washout period, ox‐LDL levels increased. A second round of therapy again suppressed ox‐LDL levels and then rose following the cessation of treatment. Serum levels of APPs, soluble CD14, lipopolysaccharide binding protein, and C‐reactive protein, were stabilized during Treg administrations, but rose during the washout period and again after therapy was discontinued. Treg therapy potentially suppresses peripheral OS and the accompanying circulating pro‐inflammatory induced APPs, both of which may serve as peripheral candidates for monitoring efficacies of immunomodulating therapies. ANN NEUROL 2022;92:195–200
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Affiliation(s)
- David R Beers
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
| | - Jason R Thonhoff
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
| | - Alireza Faridar
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
| | - Aaron D Thome
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
| | - Weihua Zhao
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
| | - Shixiang Wen
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
| | - Stanley H Appel
- Peggy and Gary Edwards ALS Laboratory, Department of Neurology, Houston Methodist Neurological Institute, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, Texas, USA
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3
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Kehm R, Baldensperger T, Raupbach J, Höhn A. Protein oxidation - Formation mechanisms, detection and relevance as biomarkers in human diseases. Redox Biol 2021; 42:101901. [PMID: 33744200 PMCID: PMC8113053 DOI: 10.1016/j.redox.2021.101901] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/06/2021] [Accepted: 02/12/2021] [Indexed: 12/16/2022] Open
Abstract
Generation of reactive oxygen species and related oxidants is an inevitable consequence of life. Proteins are major targets for oxidation reactions, because of their rapid reaction rates with oxidants and their high abundance in cells, extracellular tissues, and body fluids. Additionally, oxidative stress is able to degrade lipids and carbohydrates to highly reactive intermediates, which eventually attack proteins at various functional sites. Consequently, a wide variety of distinct posttranslational protein modifications is formed by protein oxidation, glycoxidation, and lipoxidation. Reversible modifications are relevant in physiological processes and constitute signaling mechanisms ("redox signaling"), while non-reversible modifications may contribute to pathological situations and several diseases. A rising number of publications provide evidence for their involvement in the onset and progression of diseases as well as aging processes. Certain protein oxidation products are chemically stable and formed in large quantity, which makes them promising candidates to become biomarkers of oxidative damage. Moreover, progress in the development of detection and quantification methods facilitates analysis time and effort and contributes to their future applicability in clinical routine. The present review outlines the most important classes and selected examples of oxidative protein modifications, elucidates the chemistry beyond their formation and discusses available methods for detection and analysis. Furthermore, the relevance and potential of protein modifications as biomarkers in the context of disease and aging is summarized.
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Affiliation(s)
- Richard Kehm
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany.
| | - Tim Baldensperger
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany.
| | - Jana Raupbach
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany.
| | - Annika Höhn
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764, Muenchen-Neuherberg, Germany.
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4
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Ishizuka T, Nagata W, Nomura-Takahashi S, Satoh Y. Effects of oxidized low-density lipoprotein on differentiation of mouse neural progenitor cells into neural cells. Eur J Pharmacol 2020; 888:173456. [DOI: 10.1016/j.ejphar.2020.173456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 07/31/2020] [Accepted: 07/31/2020] [Indexed: 12/18/2022]
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Sharma A, Weber D, Raupbach J, Dakal TC, Fließbach K, Ramirez A, Grune T, Wüllner U. Advanced glycation end products and protein carbonyl levels in plasma reveal sex-specific differences in Parkinson's and Alzheimer's disease. Redox Biol 2020; 34:101546. [PMID: 32460130 PMCID: PMC7251371 DOI: 10.1016/j.redox.2020.101546] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/10/2020] [Accepted: 04/20/2020] [Indexed: 11/20/2022] Open
Abstract
Neurodegenerative diseases (NDD) such as Alzheimer's (AD) and Parkinson's disease (PD) are distinct clinical entities, however, the aggregation of key neuronal proteins, presumably leading to neuronal demise appears to represent a common mechanism. It has become evident, that advanced glycation end products (AGEs) trigger the accumulation of such modified proteins, which eventually contributes to pathological aspect of NDDs. Increased levels of AGEs are found in amyloid plaques in AD brains and in both advanced and early PD (incidental Lewy body disease). The molecular mechanisms by which AGE dependent modifications may modulate the susceptibility towards NDDs, however, remain enigmatic and it is unclear, whether AGEs may serve as biomarker of NDD. In the present study, we examined AGEs (CML: Carboxymethyllysine and CEL: Carboxyethyllysine), markers of oxidative stress and micronutrients in the plasma of PD and AD patients and controls. As compared to healthy controls, AD females displayed lower levels of CEL while higher levels of CML were found in AD and PD patients. A somewhat similar pattern was observed for protein carbonyls (PC), revealing lower values exclusively in AD females, whereas AD males displayed significantly higher values compared to healthy controls and PD. Sex-specific differences were also observed for other relevant markers such as malondialdehyde, 3-nitrotyrosine, γ -tocopherols, retinol, plasma proteins and α-carotene, while α-tocopherols, β-carotene, lutein/zeaxanthin, β-cryptoxanthin and lycopene showed no relevant association. Taken together, our study suggests yet unappreciated differences of the distribution of AGEs among the sexes in NDD. We therefore suggest to make a clear distinction between sexes when analyzing oxidative (AGEs)-related stress and carbonyl-related stress and vitamins.
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Affiliation(s)
- Amit Sharma
- Department of Neurology, University Clinic Bonn, Bonn, Germany; Department of Ophthalmology, University Clinic Bonn, Bonn, Germany
| | - Daniela Weber
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam, Rehbruecke (DIfE), 14558, Nuthetal, Germany
| | - Jana Raupbach
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam, Rehbruecke (DIfE), 14558, Nuthetal, Germany
| | - Tikam Chand Dakal
- Department of Biotechnology, Mohanlal Sukhadia University, Rajasthan, India
| | - Klaus Fließbach
- Department of Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, Bonn, Germany; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Alfredo Ramirez
- Department of Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, Bonn, Germany; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany; Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, Medical Faculty, University of Cologne, Cologne, Germany
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam, Rehbruecke (DIfE), 14558, Nuthetal, Germany
| | - Ullrich Wüllner
- Department of Neurology, University Clinic Bonn, Bonn, Germany; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.
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6
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Chira A, Braicu C, Budisan L, Ioan Chira R, Berindan-Neagoe I, Lucian Dumitrascu D. Monocyte chemotactic protein-1 and nitrotyrosine in irritable bowel syndrome. Exp Ther Med 2020; 20:24-30. [PMID: 32508988 DOI: 10.3892/etm.2020.8665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 02/12/2020] [Indexed: 12/12/2022] Open
Abstract
Irritable bowel syndrome (IBS) is one the most frequent and common functional gastrointestinal disorders that has a multifactorial etiopathogenesis. Multiple biomarkers have been tested in search for a reliable and specific biomarker, but there is not yet a specific biomarker for IBS. The aim of this study was to evaluate two biomarkers of different putative pathways of the pathogenesis of IBS: the monocyte chemotactic protein-1 (MCP-1) and nitrotyrosine, in order to establish their role as potential biomarkers. We enrolled 42 consecutive IBS patients diagnosed by Rome III criteria and 35 consecutive healthy controls. Serum concentrations for the two biomarkers (MCP-1 and nitrotyrosine) were determined using commercial ELISA kits. Serum levels of MCP-1 were not statistically significantly higher in IBS patients than in controls (204±130 vs. 174±73 pg/ml; P=0.311). Nitrotyrosine levels were statistically significantly lower in IBS patients than in controls (30±12 vs. 353±14 nM; P=0.050). MCP-1 levels were higher in IBS patients with metabolic syndrome versus IBS patients without metabolic syndrome (239±153 vs. 168±120 pg/ml; P=0.948) and in controls with metabolic syndrome (174±56 pg/ml). MCP-1 serum levels were statistically significantly higher in IBS patients with metabolic syndrome than in controls (239±153 vs. 157±89 pg/ml; P=0.037), suggesting multiple factors being involved, particularly the diet and its relation with the metabolic syndrome, and it suggests that MCP-1 could be a marker of subclinical atherosclerosis. Low-grade inflammation might be related to oxidative stress, which plays an underestimated role in the pathogenesis of IBS.
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Affiliation(s)
- Alexandra Chira
- Second Medical Clinic, Department of Internal Medicine, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400006 Cluj-Napoca, Romania
| | - Cornelia Braicu
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400337 Cluj-Napoca, Romania
| | - Liviuta Budisan
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400337 Cluj-Napoca, Romania
| | - Romeo Ioan Chira
- First Medical Clinic, Division of Gastroenterology, Department of Internal Medicine, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400006 Cluj-Napoca, Romania
| | - Ioana Berindan-Neagoe
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400337 Cluj-Napoca, Romania.,MEDFUTURE - Research Center for Advanced Medicine, University of Medicine and Pharmacy Iuliu-Hatieganu, 400337 Cluj-Napoca, Romania.,Department of Functional Genomics and Experimental Pathology, The Oncology Institute 'Prof. Dr. Ion Chiricuta', 400015 Cluj-Napoca, Romania
| | - Dan Lucian Dumitrascu
- Second Medical Clinic, Department of Internal Medicine, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400006 Cluj-Napoca, Romania
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Tang Q, Wang F, Yang J, Peng H, Li Y, Li B, Wang S. Revealing a Novel Landscape of the Association Between Blood Lipid Levels and Alzheimer's Disease: A Meta-Analysis of a Case-Control Study. Front Aging Neurosci 2020; 11:370. [PMID: 32116643 PMCID: PMC7025526 DOI: 10.3389/fnagi.2019.00370] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 12/17/2019] [Indexed: 12/18/2022] Open
Abstract
Objectives: Blood lipid profiles have been ambiguously reported as biomarkers of AD in recent years. This study was conducted to evaluate the correlation between blood lipid levels and AD in later-life and to explore the effectiveness and reliability of blood lipid profiles as biomarkers of AD. Methods: Database searching was conducted using PubMed, the Cochrane Library, EMBASE, and Medline. This study was designed following the Meta-analysis of Observational Studies in Epidemiology (MOOSE) criteria. Review Manager 5.3 (RevMan 5.3) software was adopted to perform meta-analysis evaluating the standard mean difference (SMD) with its 95% confidence intervals (CI). Results: A total of 5,286 participants were enrolled from 27 case–control studies in this meta-analysis. The pooled results demonstrated that total cholesterol (TC) level was significantly associated with AD in late-life (SMD = 0.17, 95% CI: [0.01, 0.32], P = 0.03), especially in the subgroup under 70 years old (SMD: 0.45, 95% CI: [0.11, 0.79], P = 0.01) and the subgroup of Western population (SMD: 0.29, 95% CI: [0.04, 0.53], P = 0.02). In the subgroup under 70 years old, the high-density lipoprotein cholesterol (HDL-C) level (SMD = −0.50, 95% CI: [−0.76, −0.25], P = 0.0001) and the low-density lipoprotein cholesterol (LDL-C) level (SMD = 0.59, 95% CI: [0.02, 1.16], P = 0.04) in the AD group were significantly lower and higher than in the control group, respectively. In the subgroup with a sample size larger than 100 subjects, the LDL-C level was significantly higher in AD patients than in the control elderly group (SMD = 0.31, 95% CI: [0.05, 0.56], P = 0.02). There was no significant association between triglyceride (TG) levels and AD in later-life (SMD = −0.00, 95% CI: [−0.12, 0.12], P = 1.00). Conclusion: TC can be a new predictive biomarker of AD or cognitive decline in later-life. Increased TC levels are found to be associated with an elevated risk of AD. Decreased HDL-C levels and increased LDL-C levels may relate to an elevated risk of AD in subjects aged 60–70. Further comprehensive researches will be necessary in the future.
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Affiliation(s)
- Qianyun Tang
- Xiangya Hospital, Central South University, Changsha, China.,Xiangya School of Nursing, Central South University, Changsha, China
| | - Fengling Wang
- Xiangya Hospital, Central South University, Changsha, China.,Xiangya School of Nursing, Central South University, Changsha, China
| | - Jingjing Yang
- Xiangya Hospital, Central South University, Changsha, China.,Xiangya School of Nursing, Central South University, Changsha, China
| | - Hua Peng
- Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Yu Li
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Bin Li
- National Clinical Research Center for Geriatric Disorders, Geriatric Department, Xiangya Hospital, Central South University, Changsha, China
| | - Shuhong Wang
- Xiangya Hospital, Central South University, Changsha, China.,Xiangya School of Nursing, Central South University, Changsha, China
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8
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Wu Y, Wang Z, Jia X, Zhang H, Zhang H, Li J, Zhang K. Prediction of Alzheimer's disease with serum lipid levels in Asian individuals: a meta-analysis. Biomarkers 2019; 24:341-351. [PMID: 30663433 DOI: 10.1080/1354750x.2019.1571633] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Background: The serum lipid profile has become a routine clinical test and used as an important predictor for Alzheimer's disease (AD), although its predictive value remains undetermined. Objective: To evaluate the role of serum lipid levels in predicting the risk of AD. Methods: Meta-analyses were conducted using Comprehensive Meta-analyses (CMA) software to investigate the association between four conventional serum lipid profile parameters and the risk of AD, focused on samples from Asian. Results: In total, 3423 AD patients and 6127 healthy participants were involved. The results demonstrated that AD patients showed higher LDL-C and TC levels (SMD = 0.27, 95% CI: 0.04-0.51, p = 0.02 for LDL-C; SMD = 0.25, 95% CI: 0.05-0.46, p = 0.02 for TC) compared with those of healthy controls. People with higher LDL-C and/or TC levels had an increased risk of AD (OR = 1.64, 95% CI: 1.07-2.51 for LDL-C and OR = 1.58, 95% CI: 1.10-2.92 for TC). Conclusions: This study provided evidence that serum LDL-C and TC levels were associated with the risk of AD in Asian individuals. The routine lipid profile may be useful for AD diagnosis, monitoring and treatment.
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Affiliation(s)
- Yufei Wu
- a College of Life Science, Institute of Health & Population Northwest University , Xi'an , China
| | - Zhibin Wang
- a College of Life Science, Institute of Health & Population Northwest University , Xi'an , China
| | - Xueping Jia
- a College of Life Science, Institute of Health & Population Northwest University , Xi'an , China
| | - Huan Zhang
- b The 2nd Affiliated Hospital , Xi'an Jiaotong University , Xi'an , China
| | - Hong Zhang
- c Neurology Department , Shaanxi Provincial People's Hospital , Xi'an , China
| | - Junlin Li
- a College of Life Science, Institute of Health & Population Northwest University , Xi'an , China.,d Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education) , Northwest University , Xi'an , China
| | - Kejin Zhang
- a College of Life Science, Institute of Health & Population Northwest University , Xi'an , China.,d Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education) , Northwest University , Xi'an , China
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9
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Topkaya SN, Ozyurt VH, Cetin AE, Otles S. Nitration of tyrosine and its effect on DNA hybridization. Biosens Bioelectron 2017; 102:464-469. [PMID: 29182929 DOI: 10.1016/j.bios.2017.11.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 11/15/2017] [Accepted: 11/22/2017] [Indexed: 12/14/2022]
Abstract
One major marker of nitrosative stress is the formation of 3-Nitrotyrosine (3-NT) from Tyrosine (Tyr) by adding a nitro group (-NO2) with nitrating agents. Nitration of Tyr often causes loss of protein activity and is linked with many diseases. In this article, we detect 3-NT and discriminate it from Tyr with Differential Pulse Voltammetry (DPV) as it is a very important biomarker. We first examined redox (oxidation/reduction) properties and stability of 3-NT in detail. Second, we provided the Tyr and 3-NT discrimination with DPV and compared with the chromatography. We then explored the interaction of 3-NT and DNA oligonucleotides. Our findings demonstrate that 3-NT can be used as a new electrochemical indicator, which is able to detect hybridization of probe (single stranded DNA-ssDNA) and hybrid (double stranded DNA-dsDNA) both via 3-NT reduction and guanine oxidation signal changes at the same time. The signal differences enabled us to distinguish ssDNA and dsDNA without using a label or a tag. Moreover, we achieved to detect hybridization of DNA by using the reduction signal of 3-NT obtained at -0.4V vs. Ag/AgCl. More importantly, we observed the changes of the reduction signals of 3-NT after the interaction of probe and hybrid sequences. We showed that 3-NT signal decreases more with hybrid than the probe. Our platform, for the first time, demonstrates the detection of hybridization both guanine oxidation and indicator reduction signal changes at the same time. Moreover, we, for the first time, demonstrated the interaction between 3-NT and DNA.
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Affiliation(s)
- Seda Nur Topkaya
- Department of Analytical Chemistry, Faculty of Pharmacy, İzmir Katip Celebi University, Izmir, Turkey.
| | - Vasfiye Hazal Ozyurt
- Department of Food Engineering, Faculty of Engineering, Ege University, Izmir, Turkey
| | - Arif E Cetin
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, USA
| | - Semih Otles
- Department of Food Engineering, Faculty of Engineering, Ege University, Izmir, Turkey
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10
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Marotta F, Marcellino M, Solimene U, Cuffari B, Yadav H, Khokhlov AN, Lorenzetti A, Mantello A, Cervi J, Catanzaro R. A 2-year Double-Blind RCT Follow-up Study with Fermented Papaya Preparation (FPP) Modulating Key Markers in Middle-Age Subjects with Clustered Neurodegenerative Disease-Risk Factors. CLINICAL PHARMACOLOGY & BIOPHARMACEUTICS 2017; 6. [PMID: 31007971 PMCID: PMC6474671 DOI: 10.4172/2167-065x.1000170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In recent years a number of studies have reported the significant relationship between metabolic syndrome and neurodegenerative disease. There is accumulating evidence that the interplay of combined genetic and environmental risk factors (from diet to life style to pollutants) to intrinsic age-related oxi-inflammatory changes may be advocated for to explain the pandemic of neurodegenerative diseases. In recent years a specific Fermented Papaya Preparation (FPP) has been shown to significantly affect a number of redox signalling abnormalities in a variety of chronic diseases and as well in aging mechanisms either on experimental and on clinical ground. The aim of the present study was to evaluate FPP use in impending metabolic disease patients with potentially neurodegenerative disease clustered risk factors. The study population consisted of 90 patients aged 45-65 years old, with impending metabolic syndrome and previously selected as to be ApoE4 genotype negative. By applying a RCT, double-blind method, one group received FPP 4.5 g twice a day (the most common dosage utilized in prior clinical studies) while the other received an oral antioxidant cocktail (trans-resveratrol, selenium, vitamin E, vitamin C). Then, after 21 month treatment period, a selected heavy metal chelator was added at the dosage of 3 g/nocte for the final 3 months study treatment. The parameters tested were: routine tests oxidized LDL-cholesterol, anti-oxidised LDL, Cyclophilin-A (CyPA), plasminogen activator inhibitor-1 and CyPA gene expression. From this study it would appear that FPP, unlike the control antioxidant, significantly decreased oxidized-LDL and near normalizing the anti-Ox-LDL/Ox-LDL ratio (p<0.001) although unaffecting the lipid profile per sè. Moreover, only FPP decreased cyclophilin-A plasma level and plasminogen activator-inhibitor (p<0.01) together with downregulating cyclophilin-A gene expression (p<0.01). Insulin resistance was only mildly improved. Heavy metals gut clearance proved to be effectively enhanced by the chelator (p<0.01) and this was not affected by any of the nutraceuticals, nor it added any further benefit to the biological action of FPP.
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Affiliation(s)
- Francesco Marotta
- ReGenera Research Group for Aging Intervention, San Babila Clinic, Milano, Italy
| | | | - Umberto Solimene
- WHO-Center for Traditional Medicine and Biotechnology, University of Milano, Italy
| | - Biagio Cuffari
- Department of Internal Medicine, University of Catania, Catania, Italy
| | - Hariom Yadav
- Center for Diabetes, Obesity and Metabolism, Wake Forest Medical Center, Biotech Place, Winston-Salem, USA
| | - Alexander N Khokhlov
- Evolutionary Cytogerontology Sector, School of Biology, Moscow State University, Moscow, Russia
| | - Aldo Lorenzetti
- ReGenera Research Group for Aging Intervention, San Babila Clinic, Milano, Italy
| | | | - Joseph Cervi
- ReGenera Research Group for Aging Intervention, San Babila Clinic, Milano, Italy
| | - Roberto Catanzaro
- Department of Internal Medicine, University of Catania, Catania, Italy
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11
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Yamchuen P, Jeenapongsa R, Nudmamud-Thanoi S, Limpeanchob N. Low density lipoprotein increases amyloid precursor protein processing to amyloidogenic pathway in differentiated SH-SY5Y cells. Biologia (Bratisl) 2017. [DOI: 10.1515/biolog-2017-0024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Bacchetti T, Vignini A, Giulietti A, Nanetti L, Provinciali L, Luzzi S, Mazzanti L, Ferretti G. Higher Levels of Oxidized Low Density Lipoproteins in Alzheimer's Disease Patients: Roles for Platelet Activating Factor Acetyl Hydrolase and Paraoxonase-1. J Alzheimers Dis 2016; 46:179-86. [PMID: 25720407 DOI: 10.3233/jad-143096] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Alzheimer's disease (AD) is associated with oxidative damage of low density lipoproteins (ox-LDL). In order to investigate whether higher levels of ox-LDL are related to alterations of the activity of enzymes involved in lipid metabolism, we studied the activity of paraoxonase-1 (PON1) and platelet activating factor acetylhydrolase (PAF-AH) in AD patients and the relationship between biochemical markers and severity of the disease. Levels of ox-LDL, PON1 (paraoxonase, arylesterase, and lactonase activities), and PAF-AH activity were evaluated in plasma from 49 patients affected by AD and from 34 control subjects matched for gender and age. Our results demonstrated alterations in the activities of PON1 and PAF-AH in AD patients compared to controls and showed, for the first time, a relationship between the activities of these enzymes, ox-LDL levels, and severity of the disease. A significant negative correlation was observed between the ratio PON1/PAF-AH and ox-LDL. Whatever the causes that contribute to a systemic oxidative stress in AD, our results have shown that AD patients exhibit higher PAF-AH activity than control subjects and higher ox-LDL. This phenomenon, in combination with diminished PON1 in these patients and, consequently, the relatively lower ratio PON1/PAF-AH activity, could contribute to inflammation and oxidative stress of plasma lipoproteins.
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Affiliation(s)
- Tiziana Bacchetti
- Dipartimento di Scienze della Vita e dell'Ambiente (DISVA), Universitá Politecnica delle Marche, Italy
| | - Arianna Vignini
- Dipartimento di Scienze cliniche Specialistiche ed Odontostomatologiche (DISCO), Universitá Politecnica delle Marche, Italy
| | - Alessia Giulietti
- Dipartimento di Scienze cliniche Specialistiche ed Odontostomatologiche (DISCO), Universitá Politecnica delle Marche, Italy
| | - Laura Nanetti
- Dipartimento di Scienze cliniche Specialistiche ed Odontostomatologiche (DISCO), Universitá Politecnica delle Marche, Italy
| | - Leandro Provinciali
- Dipartimento Medicina Sperimentale e Clinica - Sezione Neuroscienze Cliniche, Universitá Politecnica delle Marche, Italy
| | - Simona Luzzi
- Dipartimento Medicina Sperimentale e Clinica - Sezione Neuroscienze Cliniche, Universitá Politecnica delle Marche, Italy
| | - Laura Mazzanti
- Dipartimento di Scienze cliniche Specialistiche ed Odontostomatologiche (DISCO), Universitá Politecnica delle Marche, Italy
| | - Gianna Ferretti
- Dipartimento di Scienze cliniche Specialistiche ed Odontostomatologiche (DISCO), Universitá Politecnica delle Marche, Italy
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Natarajan K, Abraham P. Methotrexate administration induces differential and selective protein tyrosine nitration and cysteine nitrosylation in the subcellular organelles of the small intestinal mucosa of rats. Chem Biol Interact 2016; 251:45-59. [DOI: 10.1016/j.cbi.2016.03.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 03/11/2016] [Accepted: 03/29/2016] [Indexed: 12/26/2022]
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