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Majumdar C, Demir M, Merrill SR, Hashemian M, David SS. FSHing for DNA Damage: Key Features of MutY Detection of 8-Oxoguanine:Adenine Mismatches. Acc Chem Res 2024; 57:1019-1031. [PMID: 38471078 PMCID: PMC10993402 DOI: 10.1021/acs.accounts.3c00759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 03/14/2024]
Abstract
Base excision repair (BER) enzymes are genomic superheroes that stealthily and accurately identify and remove chemically modified DNA bases. DNA base modifications erode the informational content of DNA and underlie many disease phenotypes, most conspicuously, cancer. The "OG" of oxidative base damage, 8-oxo-7,8-dihydroguanine (OG), is particularly insidious due to its miscoding ability that leads to the formation of rare, pro-mutagenic OG:A mismatches. Thwarting mutagenesis relies on the capture of OG:A mismatches prior to DNA replication and removal of the mis-inserted adenine by MutY glycosylases to initiate BER. The threat of OG and the importance of its repair are underscored by the association between inherited dysfunctional variants of the MutY human homologue (MUTYH) and colorectal cancer, known as MUTYH-associated polyposis (MAP). Our functional studies of the two founder MUTYH variants revealed that both have compromised activity and a reduced affinity for OG:A mismatches. Indeed, these studies underscored the challenge of the recognition of OG:A mismatches that are only subtly structurally different than T:A base pairs. Since the original discovery of MAP, many MUTYH variants have been reported, with most considered to be "variants of uncertain significance." To reveal features associated with damage recognition and adenine excision by MutY and MUTYH, we have developed a multipronged chemical biology approach combining enzyme kinetics, X-ray crystallography, single-molecule visualization, and cellular repair assays. In this review, we highlight recent work in our laboratory where we defined MutY structure-activity relationship (SAR) studies using synthetic analogs of OG and A in cellular and in vitro assays. Our studies revealed the 2-amino group of OG as the key distinguishing feature of OG:A mismatches. Indeed, the unique position of the 2-amino group in the major groove of OGsyn:Aanti mismatches provides a means for its rapid detection among a large excess of highly abundant and structurally similar canonical base pairs. Furthermore, site-directed mutagenesis and structural analysis showed that a conserved C-terminal domain β-hairpin "FSH'' loop is critical for OG recognition with the "His" serving as the lesion detector. Notably, MUTYH variants located within and near the FSH loop have been associated with different forms of cancer. Uncovering the role(s) of this loop in lesion recognition provided a detailed understanding of the search and repair process of MutY. Such insights are also useful to identify mutational hotspots and pathogenic variants, which may improve the ability of physicians to diagnose the likelihood of disease onset and prognosis. The critical importance of the "FSH" loop in lesion detection suggests that it may serve as a unique locus for targeting probes or inhibitors of MutY/MUTYH to provide new chemical biology tools and avenues for therapeutic development.
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Affiliation(s)
- Chandrima Majumdar
- Department of Chemistry, University
of California, Davis, California 95616, United States
| | - Merve Demir
- Department of Chemistry, University
of California, Davis, California 95616, United States
| | - Steven R. Merrill
- Department of Chemistry, University
of California, Davis, California 95616, United States
| | - Mohammad Hashemian
- Department of Chemistry, University
of California, Davis, California 95616, United States
| | - Sheila S. David
- Department of Chemistry, University
of California, Davis, California 95616, United States
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2
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Diptiman D, Jalan A, Pal R, Dodwani S, Bandyopadhyay D. Hist-i-fy-a multiple histidine post-translational-modification (PTM) prediction server based on protein sequences using convolution neural network: a case study on mass spectroscopy data. J Biomol Struct Dyn 2024:1-10. [PMID: 38285683 DOI: 10.1080/07391102.2024.2310200] [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: 07/24/2023] [Accepted: 01/19/2024] [Indexed: 01/31/2024]
Abstract
Computational characterization of multiple Histidine (His) post-translational-modifications (PTM) at enzyme active sites complements tedious experimental characterization in proteins-of-unknown-functions (PUFs) and domain-of-unknown-functions (DUFs). There are only a handful of Histidine-PTM-prediction-tools and those also annotate only a single function. Here, we addressed the problem using artificial neural networks on functional histidine dataset curated from enzyme (protein) sequences available in UniProt database (sample size n = 1584). The convolution-neural-network (CNN) model ('Hist-i-fy') performed the best with 75% overall accuracy/F1-score. A case study was performed on histidine-phosphorylation (n = 34) obtained from mass spectroscopy data. For the first time, we report multiple His-PTM-prediction-tool (https://histify.streamlit.app/& https://github.com/dibyansu24-maker/Histify), with optimal performance. The inputs to the tool are (i) protein sequence containing histidine, and (ii) the histidine residue number. Prediction output is one out of the eight histidine functions-acetylation, ribosylation, glycosylation, hydroxylation, methylation, oxidation, phosphorylation, and protein splicing.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Dibyansu Diptiman
- Department of Biological Sciences, Birla Institute of Technology and Science, Hyderabad, India
| | - Abhishek Jalan
- Department of Biological Sciences, Birla Institute of Technology and Science, Hyderabad, India
| | - Rishabh Pal
- Department of Biological Sciences, Birla Institute of Technology and Science, Hyderabad, India
| | - Sachin Dodwani
- Department of Biological Sciences, Birla Institute of Technology and Science, Hyderabad, India
| | - Debashree Bandyopadhyay
- Department of Biological Sciences, Birla Institute of Technology and Science, Hyderabad, India
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Wang J, Teong SP, Riduan SN, Armugam A, Lu H, Gao S, Yean YK, Ying JY, Zhang Y. Redox Active Zn@MOFs as Spontaneous Reactive Oxygen Species Releasing Antimicrobials. J Am Chem Soc 2024; 146:599-608. [PMID: 38109168 DOI: 10.1021/jacs.3c10411] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
The rapid development of antimicrobial resistance (AMR) among infectious pathogens has become a major threat and challenge in healthcare systems globally. A strategy distinct from minimizing the overuse of antimicrobials involves the development of novel antimicrobials with a mode of action that prevents the development of AMR microbial strains. Reactive oxygen species (ROS) are formed as a natural byproduct of the cellular aerobic metabolism. However, it becomes pathological when ROS is produced at excessive levels. Exploiting this phenomenon, research on redox-active bactericides has been demonstrated to be beneficial. Materials that release ROS via photodynamic, thermodynamic, and photocatalytic interventions have been developed as nanomedicines and are used in various applications. However, these materials require external stimuli for ROS release to be effective as biocides. In this paper, we report novel zinc-based metal organic framework (Zn@MOF) particles that promote the spontaneous release of active ROS species. The synthesized Zn@MOF spontaneously releases superoxide anions and hydrogen peroxide, exhibiting a potent antimicrobial efficacy against various microbes. Zn@MOF-incorporated plastic films and coatings show excellent, long-lasting antimicrobial potency even under continuous microbial challenge and an aging process. These disinfecting surfaces maintain their antimicrobial properties even after 500× surface wipes. Zn@MOF is also biocompatible and safe on the skin, illustrating its broad potential applications in medical technology and consumer care applications.
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Affiliation(s)
- Jinquan Wang
- Institute of Sustainability for Chemicals Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Republic of Singapore
- Institute of Bioengineering and Bioimaging, A*STAR (Agency for Science, Technology and Research), 31 Biopolis Way, #07-01, The Nanos, 138669 Singapore
| | - Siew Ping Teong
- Institute of Sustainability for Chemicals Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Republic of Singapore
- Institute of Bioengineering and Bioimaging, A*STAR (Agency for Science, Technology and Research), 31 Biopolis Way, #07-01, The Nanos, 138669 Singapore
| | - Siti Nurhanna Riduan
- Institute of Bioengineering and Bioimaging, A*STAR (Agency for Science, Technology and Research), 31 Biopolis Way, #07-01, The Nanos, 138669 Singapore
| | - Arunmozhiarasi Armugam
- Institute of Bioengineering and Bioimaging, A*STAR (Agency for Science, Technology and Research), 31 Biopolis Way, #07-01, The Nanos, 138669 Singapore
| | - Hongfang Lu
- NanoBio Lab, Institute of Materials Research and Engineering, A*STAR, 31 Biopolis Way, The Nanos, #09-01, 138669 Singapore
| | - Shujun Gao
- NanoBio Lab, Institute of Materials Research and Engineering, A*STAR, 31 Biopolis Way, The Nanos, #09-01, 138669 Singapore
| | - Yong Kin Yean
- NanoBio Lab, Institute of Materials Research and Engineering, A*STAR, 31 Biopolis Way, The Nanos, #09-01, 138669 Singapore
| | - Jackie Y Ying
- NanoBio Lab, Institute of Materials Research and Engineering, A*STAR, 31 Biopolis Way, The Nanos, #09-01, 138669 Singapore
- Bioengineering Department, King Fahd University of Petroleum & Minerals, Dharan 31261, Saudi Arabia
| | - Yugen Zhang
- Institute of Sustainability for Chemicals Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833, Republic of Singapore
- Institute of Bioengineering and Bioimaging, A*STAR (Agency for Science, Technology and Research), 31 Biopolis Way, #07-01, The Nanos, 138669 Singapore
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Aras A. Synthesis of two novel mercaptobenzimidazole derivative Schiff bases and their in vitro antioxidant and enzyme inhibitory effects. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Therapeutic Targets for Regulating Oxidative Damage Induced by Ischemia-Reperfusion Injury: A Study from a Pharmacological Perspective. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8624318. [PMID: 35450409 PMCID: PMC9017553 DOI: 10.1155/2022/8624318] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/28/2022] [Accepted: 03/15/2022] [Indexed: 12/22/2022]
Abstract
Ischemia-reperfusion (I-R) injury is damage caused by restoring blood flow into ischemic tissues or organs. This complex and characteristic lesion accelerates cell death induced by signaling pathways such as apoptosis, necrosis, and even ferroptosis. In addition to the direct association between I-R and the release of reactive oxygen species and reactive nitrogen species, it is involved in developing mitochondrial oxidative damage. Thus, its mechanism plays a critical role via reactive species scavenging, calcium overload modulation, electron transport chain blocking, mitochondrial permeability transition pore activation, or noncoding RNA transcription. Other receptors and molecules reduce tissue and organ damage caused by this pathology and other related diseases. These molecular targets have been gradually discovered and have essential roles in I-R resolution. Therefore, the current study is aimed at highlighting the importance of these discoveries. In this review, we inquire about the oxidative damage receptors that are relevant to reducing the damage induced by oxidative stress associated with I-R. Several complications on surgical techniques and pathology interventions do not mitigate the damage caused by I-R. Nevertheless, these therapies developed using alternative targets could work as coadjuvants in tissue transplants or I-R-related pathologies
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6
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Computational study of interactions of the uracil molecule with the F- and O2- hard anions. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2021.113568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Zhu M, Liu Z, Guo Y, Sultana MS, Wu K, Lang X, Lv Q, Huang X, Yi Z, Li Z. Sex difference in the interrelationship between TNF-α and oxidative stress status in first-episode drug-naïve schizophrenia. J Neuroinflammation 2021; 18:202. [PMID: 34526062 PMCID: PMC8444364 DOI: 10.1186/s12974-021-02261-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 08/30/2021] [Indexed: 12/13/2022] Open
Abstract
Background Increasing evidence indicates that dysregulated TNF-α and oxidative stress (OxS) contribute to the pathophysiology of schizophrenia. Additionally, previous evidence has demonstrated sex differences in many aspects of schizophrenia including clinical characteristics, cytokines, and OxS markers. However, to the best of our knowledge, there is no study investigating sex differences in the association between TNF-α, the OxS system, and their interaction with clinical symptoms in schizophrenia patients, especially in first-episode drug-naïve (FEDN) patients. Methods A total of 119 FEDN schizophrenia patients and 135 healthy controls were recruited for this study. Serum TNF-α, superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), and malondialdehyde (MDA) were measured. The Positive and Negative Syndrome Scale (PANSS) was applied to evaluate psychotic symptoms. Two-way ANOVA, partial correlation analysis, and multivariate regression analysis were performed. Results A sex difference in MDA levels was demonstrated only in healthy controls (F = 7.06, pBonferroni = 0.045) and not seen in patients. Furthermore, only male patients had higher MDA levels than male controls (F = 8.19, pBonferroni = 0.03). Additionally, sex differences were observed in the association of TNF-α and MDA levels with psychotic symptoms (all pBonferroni < 0.05). The interaction of TNF-α and MDA was only associated with general psychopathology symptom in male patients (B = − 0.07, p = 0.02). Conclusion Our results demonstrate the sex difference in the relationship between TNF-α, MDA, and their interaction with psychopathological symptoms of patients with schizophrenia.
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Affiliation(s)
- Minghuan Zhu
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, 600 South Wan Ping Road, Shanghai, 200030, China.,Clinical Research Center for Mental Disorders, Shanghai Pudong New Area Mental Health Center, School of Medicine, Tongji University, Shanghai, China
| | - Zhenjing Liu
- Qingdao Mental Health Center, Qingdao University, Qingdao, China
| | - Yanhong Guo
- Qingdao Mental Health Center, Qingdao University, Qingdao, China
| | - Mst Sadia Sultana
- Department of Public Health and Informatics, Jahangirnagar University, Savar, Dhaka, Bangladesh
| | - Kang Wu
- Department of Laboratory Medicine, Shanghai Changhai Hospital, Shanghai, China
| | - Xiaoe Lang
- Department of Psychiatry, The First Clinical Medical College, Shanxi Medical University, Taiyuan, China
| | - Qinyu Lv
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, 600 South Wan Ping Road, Shanghai, 200030, China
| | - Xiao Huang
- Department of Psychological Medicine, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, China.
| | - Zhenghui Yi
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, 600 South Wan Ping Road, Shanghai, 200030, China.
| | - Zezhi Li
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, 36 Mingxin Road, Guangzhou, 510370, China.
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Improving Sperm Oxidative Stress and Embryo Quality in Advanced Paternal Age Using Idebenone In Vitro-A Proof-of-Concept Study. Antioxidants (Basel) 2021; 10:antiox10071079. [PMID: 34356315 PMCID: PMC8301200 DOI: 10.3390/antiox10071079] [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: 06/02/2021] [Revised: 06/25/2021] [Accepted: 07/02/2021] [Indexed: 12/29/2022] Open
Abstract
Advanced paternal age is associated with increased sperm reactive oxygen species (ROS) and decreased fertilization and pregnancy rates. Sperm washing during infertility treatment provides an opportunity to reduce high sperm ROS concentrations associated with advanced paternal age through the addition of idebenone. Sperm from men aged >40 years and older CBAF1 mice (12–18 months), were treated with 5 µM and 50 µM of idebenone and intracellular and superoxide ROS concentrations assessed. Following in vitro fertilization (IVF), embryo development, blastocyst differentiation, DNA damage and cryosurvival, pregnancy and implantation rates and fetal and placental weights were assessed. Five µM of idebenone given to aged human and mouse sperm reduced superoxide concentrations ~20% (p < 0.05), while both 5 and 50 µM reduced sperm intracellular ROS concentrations in mice ~30% (p < 0.05). Following IVF, 5 µM of idebenone to aged sperm increased fertilization rates (65% vs. 60%, p < 0.05), blastocyst total, trophectoderm and inner cell mass cell numbers (73 vs. 66, 53 vs. 47 and 27 vs. 24, respectively, p < 0.01). Treatment with idebenone also increased blastocyst cryosurvival rates (96% vs. 78%, p < 0.01) and implantation rates following embryo transfer (35% vs. 18%, p < 0.01). Placental weights were smaller (107 mg vs. 138 mg, p < 0.05), resulting in a larger fetal to placental weight ratio (8.3 vs. 6.3, p = 0.07) after sperm idebenone treatment. Increased sperm ROS concentrations associated with advanced paternal age are reduced with the addition of idebenone in vitro, and are associated with improved fertilization rates, embryo quality and implantation rates after IVF.
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9
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Nguyen-Powanda P, Robaire B. Aging and oxidative stress alter DNA repair mechanisms in male germ cells of superoxide dismutase-1 null mice. Biol Reprod 2021; 105:944-957. [PMID: 34098580 DOI: 10.1093/biolre/ioab114] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/17/2021] [Accepted: 05/29/2021] [Indexed: 11/13/2022] Open
Abstract
The efficiency of antioxidant defense system decreases with aging, thus resulting in high levels of reactive oxygen species (ROS) and DNA damage in spermatozoa. This damage can lead to genetic disorders in the offspring. There are limited studies investigating the effects of the total loss of antioxidants, such as superoxide dismutase-1 (SOD1), in male germ cells as they progress through spermatogenesis. In this study, we evaluated the effects of aging and removing SOD1 (in male germ cells of SOD1-null (Sod1-/-) mice) in order to determine the potential mechanism(s) of DNA damage in these cells. Immunohistochemical analysis showed an increase in lipid peroxidation and DNA damage in the germ cells of aged wild-type (WT) and Sod1-/- mice of all age. Immunostaining of OGG1, a marker of base excision repair (BER), increased in aged WT and young Sod1-/- mice. In contrast, immunostaining intensity of LIGIV and RAD51, markers of non-homologous end-joining (NHEJ) and homologous recombination (HR), respectively, decreased in aged and Sod1-/- mice. Gene expression analysis showed similar results with altered mRNA expression of these key DNA repair transcripts in pachytene spermatocytes and round spermatids of aged and Sod1-/- mice. Our study indicates that DNA repair pathway markers of BER, NHEJ, and HR are differentially regulated as a function of aging and oxidative stress in spermatocytes and spermatids, and aging enhances the repair response to increased oxidative DNA damage, whereas impairments in other DNA repair mechanisms may contribute to the increase in DNA damage caused by aging and the loss of SOD1.
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Affiliation(s)
| | - Bernard Robaire
- Department of Obstetrics & Gynecology, McGill University, Montreal, Quebec, Canada
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Oxidative Stress and Reproductive Function in the Aging Male. BIOLOGY 2020; 9:biology9090282. [PMID: 32932761 PMCID: PMC7564187 DOI: 10.3390/biology9090282] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/02/2020] [Accepted: 09/06/2020] [Indexed: 12/21/2022]
Abstract
With the delay of parenthood becoming more common, the age at which men father children is on the rise. While the effects of advanced maternal age have been well documented, only recently have studies started to focus on the impact of advanced paternal age (APA) in the context of male reproduction. As men age, the antioxidant defense system gradually becomes less efficient and elevated levels of reactive oxygen species (ROS) accumulate in spermatozoa; this can impair their functional and structural integrity. In this review, we present an overview of how oxidative stress is implicated in male reproductive aging by providing a summary of the sources and roles of ROS, the theories of aging, and the current animal and human studies that demonstrate the impacts of APA on the male germ line, the health of progeny and fertility, and how treatment with antioxidants may reverse these effects.
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Yanar K, Atayik MC, Simsek B, Çakatay U. Novel biomarkers for the evaluation of aging-induced proteinopathies. Biogerontology 2020; 21:531-548. [PMID: 32274599 DOI: 10.1007/s10522-020-09878-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 04/02/2020] [Indexed: 02/07/2023]
Abstract
Proteinopathies are characterized by aging related accumulation of misfolded protein aggregates. Irreversible covalent modifications of aging proteins may significantly affect the native three dimentional conformation of proteins, alter their function and lead to accumulation of misfolded protein as dysfunctional aggregates. Protein misfolding and accumulation of aberrant proteins are known to be associated with aging-induced proteinopathies such as amyloid ß and tau proteins in Alzheimer's disease, α-synuclein in Parkinson's disease and islet amyloid polypeptides in Type 2 diabetes mellitus. Protein oxidation processes such as S-nitrosylation, dityrosine formation and some of the newly elucidated processes such as carbamylation and citrullination recently drew the attention of researchers in the field of Gerontology. Studying over these processes and illuminating their relations between proteinopathies may help to diagnose early and even to treat age related disorders. Therefore, we have chosen to concentrate on aging-induced proteinopathic nature of these novel protein modifications in this review.
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Affiliation(s)
- Karolin Yanar
- Department of Medical Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Mehmet Can Atayik
- Cerrahpasa Faculty of Medicine, Medical Program, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Bahadir Simsek
- Cerrahpasa Faculty of Medicine, Medical Program, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ufuk Çakatay
- Department of Medical Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.
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Jalali SS, Talebi J, Allymehr M, Soleimanzadeh A, Razi M. Effects of nano-selenium on mRNA expression of markers for spermatogonial stem cells in the testis of broiler breeder males. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2019; 10:139-144. [PMID: 31338147 PMCID: PMC6626653 DOI: 10.30466/vrf.2018.86992.2128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 07/24/2018] [Indexed: 01/22/2023]
Abstract
Fertility is one of the most important parameters in breeder farms and cockerels play an outstanding role in the fertility of eggs in broiler breeder farms. Todays, supplementation of chicken diet with additives such as organic selenium is used to increase fertility. The aim of this study was to evaluate the effects of different levels of nano-selenium (Nano-Se) on the expression of molecular markers of spermatogonial stem cells (SSCs) in the testis of broiler breeder males. A total of 30 roosters of 40 weeks of age were randomly divided into five groups. Groups were as follows: 1) control (normal diet) group, 2) diet supplemented with 0.30 mg kg-1 sodium selenite, 3) diet supplemented with 0.15 mg kg-1 Nano-Se, 4) diet supplemented with 0.30 mg kg-1 Nano-Se, and 5) diet supplemented with 0.60 mg kg-1 Nano-Se. At the end of the experimental period (5th week), birds were autopsied and samples from testis of all birds were collected. The testis samples were used to examine the β1-integrin (CD29), thy-1 (CD90) and NANOG mRNA expression by real-time PCR. The results showed that testis of the groups fed with the diets supplemented with 0.60 mg kg-1 and 0.15 mg kg-1 of Nano-Se had the highest and lowest mRNA expression of SSCs markers, respectively. In conclusion, the present study indicated that Nano-Se had advantages over sodium selenite. Diet supplemented with 0.60 mg kg-1 of Nano-Se may contribute to optimal fertility via increasing the mRNA expression of SSCs markers of roosters’ testis and could be used to delay the reduction of fertility caused by aging in broiler breeder males.
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Affiliation(s)
- Seyed Sattar Jalali
- Department of Poultry Health and Diseases, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Jalali Talebi
- Department of Poultry Health and Diseases, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Manoochehr Allymehr
- Department of Poultry Health and Diseases, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Ali Soleimanzadeh
- Department of Theriogenology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Mazdak Razi
- Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
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DFT modeling of the prevention of Fe(II)-mediated redox damage by imidazole-based thiones and selones. J Inorg Biochem 2019; 193:9-14. [DOI: 10.1016/j.jinorgbio.2018.12.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 12/24/2018] [Accepted: 12/25/2018] [Indexed: 12/27/2022]
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14
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Akhter P, Ashiq U, Jamal RA, Shaikh Z, Mahroof-Tahir M, Lateef M, Badar R. Chemistry, Alpha-glucosidase and Radical Scavenging Properties of Uranyl(VI) Hydrazide Complexes. Med Chem 2019; 15:923-936. [PMID: 30760191 DOI: 10.2174/1573406415666190213101044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 01/15/2019] [Accepted: 01/28/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Antioxidant, anti-inflammatory, antiviral and antitumoral activities among others are essential characteristics in the development of novel therapeutic compounds. Acid hydrazides can form complexation with certain metal ions that positively enhance these biological characteristics. OBJECTIVE Five new complexes of uranium with hydrazide ligands were synthesized at room temperature. METHODS The characterization was done by spectroscopic methods (ESI-Mass, IR, 1H-NMR, 13CNMR), CHN analysis and conductivity measurements. Metal complexes along with their respective ligands were further screened for their antioxidant (DPPH, superoxide and nitric oxide free radicals) properties and enzyme inhibition (α-glucosidase) activities. RESULTS Elemental and spectral data indicate octahedral geometry around uranyl (UO2 2+) species. Magnetic moments indicate the diamagnetic nature of uranyl(VI) ion in the complex in solid state. IC50 values showed potential antioxidant behavior of uranyl complexes demonstrating interesting structure-activity relationships. In general, hydrazide ligands were not active against superoxide and nitric oxide radicals while varying degree of results were observed against DPPH radical whereas all uranyl-complexes showed promising radical scavenging activities against all of them. Promising inhibitory potential was displayed by UO2 +2 hydrazide complexes against α- glucosidases whereas free hydrazide ligands were inactive. CONCLUSION Structure function relationship demonstrates that the nature of ligand, position of substituent, electronic and steric effects are significant factors affecting the radical scavenging and enzyme inhibition activities of the compounds.
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Affiliation(s)
- Parveen Akhter
- Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Uzma Ashiq
- Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Rifat A Jamal
- Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | - Zara Shaikh
- Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
| | | | - Mehreen Lateef
- Multi Disciplinary Research Lab, Bahria University Medical and Dental College, Karachi, Pakistan
| | - Rooma Badar
- Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
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Abstract
The ethanol-water (7 : 3, v/v) extract of Cotoneaster multiflorus sarcocarp was sequentially fractionated by liquid-liquid partition using n-hexane, diethyl ether, methylene dichloride, and ethyl acetate. The contents of total polyphenols, total flavones, and oligomeric proanthocyanidins in the five parts (including the ethanol-water extract) were determined. In addition, 2,2-diphenyl-1-picrylhydrazyl free radical-scavenging, 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt radical cation decolorization, reducing power, ferric reducing antioxidant power, and lipid peroxidation inhibition assays were conducted to test the antioxidant activities of Sample 1 (the ethanol-water fraction) and Sample 2 (the ethyl acetate fraction) in vitro. In the above five assays, Sample 2 showed greater antioxidant capacities than Sample 1. Furthermore, Sample 2 was better able to protect low-density lipoproteins from oxidation in a dose-dependent manner. The test results show that C. multiflorus sarcocarp, especially the ethyl acetate-soluble fraction, may be a potential source of natural antioxidants.
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Riyad YM. Thioanisole triplet: Laser flash photolysis and pulse radiolysis studies. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Leon AS. Attenuation of Adverse Effects of Aging on Skeletal Muscle by Regular Exercise and Nutritional Support. Am J Lifestyle Med 2017; 11:4-16. [PMID: 30202306 PMCID: PMC6124840 DOI: 10.1177/1559827615589319] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/06/2015] [Indexed: 12/19/2022] Open
Abstract
Beginning early in midlife, natural/primary aging is inevitably associated with a progressive reduction in muscle mass and function. This process can progress with aging to a substantial loss of strength, particularly in the lower extremities, reducing mobility. This condition, commonly referred to as sarcopenia, can result in frailty, reducing one's ability to live independently. This article reviews the underlying biological process contributing to the development of sarcopenia and the roles of regular exercise and nutritional support for attenuating aging-associated muscle loss as well as risk and management of sarcopenia and associated frailty.
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Yehye WA, Abdul Rahman N, Saad O, Ariffin A, Abd Hamid SB, Alhadi AA, Kadir FA, Yaeghoobi M, Matlob AA. Rational Design and Synthesis of New, High Efficiency, Multipotent Schiff Base-1,2,4-triazole Antioxidants Bearing Butylated Hydroxytoluene Moieties. Molecules 2016; 21:E847. [PMID: 27367658 PMCID: PMC6273539 DOI: 10.3390/molecules21070847] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 06/22/2016] [Accepted: 06/24/2016] [Indexed: 11/16/2022] Open
Abstract
A new series of multipotent antioxidants (MPAOs), namely Schiff base-1,2,4-triazoles attached to the oxygen-derived free radical scavenging moiety butylated hydroxytoluene (BHT) were designed and subsequently synthesized. The structure-activity relationship (SAR) of the designed antioxidants was established alongside the prediction of activity spectra for substances (PASS). The antioxidant activities of the synthesized compounds 4-10 were tested by the DPPH bioassay. The synthesized compounds 4-10 inhibited stable DPPH free radicals at a level that is 10(-4) M more than the well-known standard antioxidant BHT. Compounds 8-10 with para-substituents were less active than compounds 4 and 5 with trimethoxy substituents compared to those with a second BHT moiety (compounds 6 and 7). With an IC50 of 46.13 ± 0.31 µM, compound 6 exhibited the most promising in vitro inhibition at 89%. Therefore, novel MPAOs containing active triazole rings, thioethers, Schiff bases, and BHT moieties are suggested as potential antioxidants for inhibiting oxidative stress processes and scavenging free radicals, hence, this combination of functions is anticipated to play a vital role in repairing cellular damage, preventing various human diseases and in medical therapeutic applications.
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Affiliation(s)
- Wageeh A Yehye
- Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, Block 3A, Institute of Postgraduate Studies Building, Kuala Lumpur 50603, Malaysia.
| | - Noorsaadah Abdul Rahman
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Drug Design and Development Research Group, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Omar Saad
- Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Azhar Ariffin
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Sharifah Bee Abd Hamid
- Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, Block 3A, Institute of Postgraduate Studies Building, Kuala Lumpur 50603, Malaysia.
| | - Abeer A Alhadi
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Drug Design and Development Research Group, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Farkaad A Kadir
- Division of Human Biology, School of Medicine, International Medical University, Kuala Lumpur 57000, Malaysia.
| | - Marzieh Yaeghoobi
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Drug Design and Development Research Group, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Abdulsalam A Matlob
- Department of Environmental Technology, College of Environment, Mosul University, Mosul 41001, Iraq.
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19
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De Lutiis MA, Felaco M, Gizzi F, Patruno A, Speranza L, Di Giulio C, Conti P, Castellani ML, Petrarca C, Grilli A. A Scavenger Role for Nitric Oxide in the Aged Rat Kidney. Int J Immunopathol Pharmacol 2016; 17:265-71. [PMID: 15461860 DOI: 10.1177/039463200401700306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Progressive ageing is associated with an increment of biomolecules modified through oxidation as a result of the action of free radicals deriving from reactive oxygen species that attack biomolecules. During ageing many alterations of renal functions have been reported. Renal ageing is associated with a progressive decline of glomerular filtration, renal blood flow and augmented vascular resistance. The kidney is a very important source of inducible nitric oxide synthase (iNOS) in both epithelial and vascular structures. In this study we have investigated mRNA and protein iNOS expression and localization and nitric oxide (NO) production in young and aged rats. An increased expression of iNOS occurs in rat kidney during ageing. In the aged rat, an increase in the values of both iNOS-RNA and iNOS protein was observed through rtPCR and Western blot analysis. The activities of three isoforms of NOS were also seen. In the aged rat kidney the production of NO decreased, due to the reduction of the activities of the three NOS. This suggests that in the aged rat a progressive increase of superoxide anion does not imply an increase in the production of NO which functions as a scavenger molecule, causing oxidative stress with accumulation of reactive oxygen species (ROS).
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Affiliation(s)
- M A De Lutiis
- Department of Biomorphology, University "G. D'Annunzio" of Chieti, Chieti Scalo, Italy
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Lee SJR, Mullinax JW, Schaefer HF. Intermolecular interactions and proton transfer in the hydrogen halide-superoxide anion complexes. Phys Chem Chem Phys 2016; 18:6201-8. [PMID: 26852733 DOI: 10.1039/c5cp05878c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The superoxide radical anion O2(-) is involved in many important chemical processes spanning different scientific disciplines (e.g., environmental and biological sciences). Characterizing its interaction with various substrates to help elucidate its rich chemistry may have far reaching implications. Herein, we investigate the interaction between O2(-) (X[combining tilde] (2)Πg) and the hydrogen halides (X[combining tilde] (1)Σ) with coupled-cluster theory. In contrast to the short (1.324 Å) hydrogen bond formed between the HF and O2(-) monomers, a barrierless proton transfer occurs for the heavier hydrogen halides with the resulting complexes characterized as long (>1.89 Å) hydrogen bonds between halide anions and the HO2 radical. The dissociation energy with harmonic zero-point vibrational energy (ZPVE) for FHO2(-) (X[combining tilde] (2)A'') → HF (X[combining tilde] (1)Σ) + O2(-) (X[combining tilde] (2)Πg) is 31.2 kcal mol(-1). The other dissociation energies with ZPVE for X(-)HO2 (X[combining tilde] (2)A'') → X(-) (X[combining tilde] (1)Σ) + HO2 (X[combining tilde] (2)A'') are 25.7 kcal mol(-1) for X = Cl, 21.9 kcal mol(-1) for X = Br, and 17.9 kcal mol(-1) for X = I. Additionally, the heavier hydrogen halides can form weak halogen bonds H-XO2(-) (X[combining tilde] (2)A'') with interaction energies including ZPVE of -2.3 kcal mol(-1) for HCl, -8.3 kcal mol(-1) for HBr, and -16.7 kcal mol(-1) for HI.
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Affiliation(s)
- Sebastian J R Lee
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, USA.
| | - J Wayne Mullinax
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, USA.
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, USA.
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21
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Chang J, Lee CW, Alsulimani HH, Choi JE, Lee JK, Kim A, Park BH, Kim J, Lee H. Role of fatty acid composites in the toxicity of titanium dioxide nanoparticles used in cosmetic products. J Toxicol Sci 2016; 41:533-42. [DOI: 10.2131/jts.41.533] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- JuOae Chang
- Department of Pharmaceutical Sciences, Northeastern University, USA
| | | | | | - Jee Eun Choi
- Department of Pharmaceutical Sciences, Northeastern University, USA
| | - Joo-Kyung Lee
- Division of Quantum Phases and Devices, Department of Physics, Konkuk University, South Korea
| | - AhYoung Kim
- Division of Quantum Phases and Devices, Department of Physics, Konkuk University, South Korea
| | - Bae Ho Park
- Division of Quantum Phases and Devices, Department of Physics, Konkuk University, South Korea
| | - Jonghan Kim
- Department of Pharmaceutical Sciences, Northeastern University, USA
| | - HeaYeon Lee
- Department of Pharmaceutical Sciences, Northeastern University, USA
- Department of Nano-integrated Cogno-Mechatronics Engineering, Pusan National University, South Korea
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22
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Smith EJ, Shay KP, Thomas NO, Butler JA, Finlay LF, Hagen TM. Age-related loss of hepatic Nrf2 protein homeostasis: Potential role for heightened expression of miR-146a. Free Radic Biol Med 2015; 89:1184-91. [PMID: 26549877 PMCID: PMC4684725 DOI: 10.1016/j.freeradbiomed.2015.11.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 10/30/2015] [Accepted: 11/03/2015] [Indexed: 12/26/2022]
Abstract
Nrf2 regulates the expression of numerous anti-oxidant, anti-inflammatory, and metabolic genes. We observed that, paradoxically, Nrf2 protein levels decline in the livers of aged rats despite the inflammatory environment evident in that organ. To examine the cause(s) of this loss, we investigated the age-related changes in Nrf2 protein homeostasis and activation in cultured hepatocytes from young (4-6 months) and old (24-28 months) Fischer 344 rats. While no age-dependent change in Nrf2 mRNA levels was observed (p>0.05), Nrf2 protein content, and the basal and anetholetrithione (A3T)-induced expression of Nrf2-dependent genes were attenuated with age. Conversely, overexpression of Nrf2 in cells from old animals reinstated gene induction. Treatment with A3T, along with bortezomib to inhibit degradation of existing protein, caused Nrf2 to accumulate significantly in cells from young animals (p<0.05), but not old, indicating a lack of new Nrf2 synthesis. We hypothesized that the loss of Nrf2 protein synthesis with age may partly stem from an age-related increase in microRNA inhibition of Nrf2 translation. Microarray analysis revealed that six microRNAs significantly increase >2-fold with age (p<0.05). One of these, miRNA-146a, is predicted to bind Nrf2 mRNA. Transfection of hepatocytes from young rats with a miRNA-146a mimic caused a 55% attenuation of Nrf2 translation that paralleled the age-related loss of Nrf2. Overall, these results provide novel insights for the age-related decline in Nrf2 and identify new targets to maintain Nrf2-dependent detoxification with age.
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Affiliation(s)
- Eric J Smith
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA; Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331-7305, USA
| | - Kate P Shay
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA
| | - Nicholas O Thomas
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA; Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331-7305, USA
| | - Judy A Butler
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA
| | - Liam F Finlay
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA
| | - Tory M Hagen
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA; Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331-7305, USA.
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23
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Abdulwahab MK, Ariffin A, Yehye WA, Abdul-Aziz A, Kareem HS, Nordin N. Synthesis of the Hydrazones of 2-((3,5-Di-tert-butyl-4-hydroxybenzyl)thio) acetohydrazide and the Study of their Radical Scavenging Activity by the DPPH Assay and the Computational Method. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Muhammad K. Abdulwahab
- Department of Chemistry, Faculty of Science; University of Malaya; Kuala Lumpur 50603 Malaysia
| | - Azhar Ariffin
- Department of Chemistry, Faculty of Science; University of Malaya; Kuala Lumpur 50603 Malaysia
| | - Wageeh A. Yehye
- Nanotechnology & Catalysis Research Centre (NANOCAT); University of Malaya; Kuala Lumpur 50603 Malaysia
| | - Azlina Abdul-Aziz
- Department of Molecular Medicine, Faculty of Medicine; University of Malaya; Kuala Lumpur 50603 Malaysia
| | - Huda S. Kareem
- Department of Chemistry, Faculty of Science; University of Malaya; Kuala Lumpur 50603 Malaysia
| | - Nurdiana Nordin
- Department of Chemistry, Faculty of Science; University of Malaya; Kuala Lumpur 50603 Malaysia
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24
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Martinez DM, Barcellos AM, Casaril AM, Savegnago L, Perin G, Schiesser CH, Callaghan KL, Lenardão EJ. Twice acting antioxidants: synthesis and antioxidant properties of selenium and sulfur-containing zingerone derivatives. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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25
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An ab initio molecular dynamics study of the hydrogen bonded structure, dynamics and vibrational spectral diffusion of water in the ion hydration shell of a superoxide ion. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Ariffin A, Rahman NA, Yehye WA, Alhadi AA, Kadir FA. PASS-assisted design, synthesis and antioxidant evaluation of new butylated hydroxytoluene derivatives. Eur J Med Chem 2014; 87:564-77. [DOI: 10.1016/j.ejmech.2014.10.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 09/02/2014] [Accepted: 10/01/2014] [Indexed: 01/22/2023]
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27
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Venkataraman K, Khurana S, Tai TC. Oxidative stress in aging--matters of the heart and mind. Int J Mol Sci 2013; 14:17897-925. [PMID: 24002027 PMCID: PMC3794759 DOI: 10.3390/ijms140917897] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 08/10/2013] [Accepted: 08/15/2013] [Indexed: 01/15/2023] Open
Abstract
Oxidative damage is considered to be the primary cause of several aging associated disease pathologies. Cumulative oxidative damage tends to be pervasive among cellular macromolecules, impacting proteins, lipids, RNA and DNA of cells. At a systemic level, events subsequent to oxidative damage induce an inflammatory response to sites of oxidative damage, often contributing to additional oxidative stress. At a cellular level, oxidative damage to mitochondria results in acidification of the cytoplasm and release of cytochrome c, causing apoptosis. This review summarizes findings in the literature on oxidative stress and consequent damage on cells and tissues of the cardiovascular system and the central nervous system, with a focus on aging-related diseases that have well-documented evidence of oxidative damage in initiation and/or progression of the disease. The current understanding of the cellular mechanisms with a focus on macromolecular damage, impacted cellular pathways and gross morphological changes associated with oxidative damage is also reviewed. Additionally, the impact of calorific restriction with its profound impact on cardiovascular and neuronal aging is addressed.
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Affiliation(s)
- Krishnan Venkataraman
- Department of Gerontology, Huntington University, Sudbury, ON P3E 2C6, Canada; E-Mail:
| | - Sandhya Khurana
- Medical Sciences Division, Northern Ontario School of Medicine, Sudbury, ON P3E 2C6, Canada; E-Mail:
| | - T. C. Tai
- Medical Sciences Division, Northern Ontario School of Medicine, Sudbury, ON P3E 2C6, Canada; E-Mail:
- Department of Biology, Department of Chemistry and Biochemistry, Biomolecular Sciences Program, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON P3E 2C6, Canada
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-705-662-7239; Fax: +1-705-675-4858
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28
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Janik I, Tripathi GNR. The nature of the superoxide radical anion in water. J Chem Phys 2013; 139:014302. [DOI: 10.1063/1.4811697] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Marada A, Allu PK, Murari A, PullaReddy B, Tammineni P, Thiriveedi VR, Danduprolu J, Sepuri NBV. Mge1, a nucleotide exchange factor of Hsp70, acts as an oxidative sensor to regulate mitochondrial Hsp70 function. Mol Biol Cell 2013; 24:692-703. [PMID: 23345595 PMCID: PMC3596242 DOI: 10.1091/mbc.e12-10-0719] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Yeast Mge1, the cochaperone of mitochondrial heat shock protein 70 (mHsp70), is essential for exchanging ATP for ADP on mHsp70 and thus for recycling of mHsp70 for mitochondrial protein import and folding. Mge1 acts as an oxidative sensor to regulate mHsp70 function. Despite the growing evidence of the role of oxidative stress in disease, its molecular mechanism of action remains poorly understood. The yeast Saccharomyces cerevisiae provides a valuable model system in which to elucidate the effects of oxidative stress on mitochondria in higher eukaryotes. Dimeric yeast Mge1, the cochaperone of heat shock protein 70 (Hsp70), is essential for exchanging ATP for ADP on Hsp70 and thus for recycling of Hsp70 for mitochondrial protein import and folding. Here we show an oxidative stress–dependent decrease in Mge1 dimer formation accompanied by a concomitant decrease in Mge1–Hsp70 complex formation in vitro. The Mge1-M155L substitution mutant stabilizes both Mge1 dimer and Mge1–Hsp70 complex formation. Most important, the Mge1-M155L mutant rescues the slow-growth phenomenon associated with the wild-type Mge1 strain in the presence of H2O2 in vivo, stimulation of the ATPase activity of Hsp70, and the protein import defect during oxidative stress in vitro. Furthermore, cross-linking studies reveal that Mge1–Hsp70 complex formation in mitochondria isolated from wild-type Mge1 cells is more susceptible to reactive oxygen species compared with mitochondria from Mge1-M155L cells. This novel oxidative sensor capability of yeast Mge1 might represent an evolutionarily conserved function, given that human recombinant dimeric Mge1 is also sensitive to H2O2.
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Affiliation(s)
- Adinarayana Marada
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, India
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30
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Fawzy WM, Elsayed M, Zhang Y. Correlated ab initio investigations on the intermolecular and intramolecular potential energy surfaces in the ground electronic state of the O2(-)(X2Πg)-HF(X1Σ+) complex. J Chem Phys 2013; 138:014304. [PMID: 23298038 DOI: 10.1063/1.4772653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This work reports the first highly correlated ab initio study of the intermolecular and intramolecular potential energy surfaces in the ground electronic state of the O(2)(-)(X(2)Π(g))-HF(X(1)Σ(+)) complex. Accurate electronic structure calculations were performed using the coupled cluster method including single and double excitations with addition of the perturbative triples correction [CCSD(T)] with the Dunning's correlation consistent basis sets aug-cc-pVnZ, n = 2-5. Also, the explicitly correlated CCSD(T)-F12a level of theory was employed with the AVnZ basis as well as the Peterson and co-workers VnZ-F12 basis sets with n = 2 and 3. Results of all levels of calculations predicted two equivalent minimum energy structures of planar geometry and C(s) symmetry along the A" surface of the complex, whereas the A' surface is repulsive. Values of the geometrical parameters and the counterpoise corrected dissociation energies (Cp-D(e)) that were calculated using the CCSD(T)-F12a/VnZ-F12 level of theory are in excellent agreement with those obtained from the CCSD(T)/aug-cc-pV5Z calculations. The minimum energy structure is characterized by a very short hydrogen bond of length of 1.328 Å, with elongation of the HF bond distance in the complex by 0.133 Å, and D(e) value of 32.313 Kcal/mol. Mulliken atomic charges showed that 65% of the negative charge is localized on the hydrogen bonded end of the superoxide radical and the HF unit becomes considerably polarized in the complex. These results suggest that the hydrogen bond is an incipient ionic bond. Exploration of the potential energy surface confirmed the identified minimum and provided support for vibrationally induced intramolecular proton transfer within the complex. The T-shaped geometry that possesses C(2v) symmetry presents a saddle point on the top of the barrier to the in-plane bending of the hydrogen above and below the axis that connects centers of masses of the monomers. The height of this barrier is 7.257 Kcal/mol, which is higher in energy than the hydrogen bending frequency by 909.2 cm(-1). The calculated harmonic oscillator vibrational frequencies showed that the H-F stretch vibrational transition in the complex is redshifted by 2564 cm(-1) and gained significant intensity (by at least a factor of 30) with respect to the transition in the HF monomer. These results make the O(2)(-)-HF complex an excellent prototype for infrared spectroscopic investigations on open-shell complexes with vibrationally induced proton transfer.
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Affiliation(s)
- Wafaa M Fawzy
- Department of Chemistry, Murray State University, 1201 Jesse D. Jones Hall, Murray, Kentucky 42071, USA.
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Butylated hydroxytoluene analogs: synthesis and evaluation of their multipotent antioxidant activities. Molecules 2012; 17:7645-65. [PMID: 22732881 PMCID: PMC6268739 DOI: 10.3390/molecules17077645] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 06/01/2012] [Accepted: 06/12/2012] [Indexed: 01/13/2023] Open
Abstract
A computer-aided predictions of antioxidant activities were performed with the Prediction Activity Spectra of Substances (PASS) program. Antioxidant activity of compounds 1, 3, 4 and 5 were studied using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and lipid peroxidation assays to verify the predictions obtained by the PASS program. Compounds 3 and 5 showed more inhibition of DPPH stable free radical at 10−4 M than the well-known standard antioxidant, butylated hydroxytoluene (BHT). Compound 5 exhibited promising in vitro inhibition of Fe2+-induced lipid peroxidation of the essential egg yolk as a lipid-rich medium (83.99%, IC50 16.07 ± 3.51 µM/mL) compared to α-tocopherol (α-TOH, 84.6%, IC50 5.6 ± 1.09 µM/mL). The parameters for drug-likeness of these BHT analogues were also evaluated according to the Lipinski’s “rule-of-five” (RO5). All the BHT analogues were found to violate one of the Lipinski’s parameters (LogP > 5), even though they have been found to be soluble in protic solvents. The predictive polar surface area (PSA) and absorption percent (% ABS) data allow us to conclude that they could have a good capacity for penetrating cell membranes. Therefore, one can propose these new multipotent antioxidants (MPAOs) as potential antioxidants for tackling oxidative stress and lipid peroxidation processes.
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32
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Fawzy WM. Ab Initio Study of the Intermolecular Potential Energy Surface in the Ion-Induced-Dipole Hydrogen-Bonded O2–(X2Πg)–H2(X1Σg+) Complex. J Phys Chem A 2012; 116:1069-76. [DOI: 10.1021/jp2088753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wafaa M. Fawzy
- Department of Chemistry, Murray State University, 1201 Jesse D. Jones Hall, Murray, Kentucky 42071, United States
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33
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San BH, Moh SH, Kim KK. The effect of protein shells on the antioxidant activity of protein-encapsulated platinum nanoparticles. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14581a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Lenaz G. Mitochondria and reactive oxygen species. Which role in physiology and pathology? ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 942:93-136. [PMID: 22399420 DOI: 10.1007/978-94-007-2869-1_5] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Oxidative stress is among the major causes of toxicity due to interaction of Reactive Oxygen Species (ROS) with cellular macromolecules and structures and interference with signal transduction pathways. The mitochondrial respiratory chain, specially from Complexes I and III, is considered the main origin of ROS particularly under conditions of high membrane potential, but several other sources may be important for ROS generation, such as mitochondrial p66(Shc), monoamine oxidase, α-ketoglutarate dehydogenase, besides redox cycling of redox-active molecules. ROS are able to oxidatively modify lipids, proteins, carbohydrates and nucleic acids in mitochondria and to activate/inactivate signalling pathways by oxidative modification of redox-active factors. Cells are endowed with several defence mechanisms including repair or removal of damaged molecules, and antioxidant systems, either enzymatic or non-enzymatic. Oxidative stress is at the basis of ageing and many pathological disorders, such as ischemic diseases, neurodegenerative diseases, diabetes, and cancer, although the underlying mechanisms are not always completely understood.
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Affiliation(s)
- Giorgio Lenaz
- Dipartimento di Biochimica, Università di Bologna, Bologna, Italy.
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Paul C, Nagano M, Robaire B. Aging results in differential regulation of DNA repair pathways in pachytene spermatocytes in the Brown Norway rat. Biol Reprod 2011; 85:1269-78. [PMID: 21865553 DOI: 10.1095/biolreprod.111.094219] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The present trend of increasing paternal age is accompanied by concerns for the development of complex multigene diseases (e.g., autism and schizophrenia) in progeny. Recent studies have established strong correlations between male age, increased oxidative stress, decreased sperm quality, and structural aberrations of chromatin and DNA in spermatozoa. We tested the hypothesis that increasing age would result in altered gene expression relating to oxidative stress and DNA damage/repair in germ cells. To test this hypothesis, pachytene spermatocytes and round spermatids were isolated from Brown Norway (BN) rats at 4 (young) and 18 (aged) mo of age. Microarray analysis was used to compare gene expression between the groups. The probe sets with significantly altered expression were linked to DNA damage/repair and oxidative stress in pachytene spermatocytes but not in round spermatids. Further analysis of pachytene spermatocytes demonstrated that genes involved in the base excision repair (BER) and nucleotide excision repair (NER) pathways were specifically altered. Quantitative RT-PCR confirmed that NER genes were upregulated (>1.5-fold), whereas BER genes were downregulated (>1.5-fold). At the protein level the members of the BER pathway were also altered by up to 2.3-fold; levels of NER proteins remained unchanged. Furthermore, there was an increase in 8-oxo-2'-deoxyguanosine (8-oxodG) immunoreactivity in testes from aged males and in the number of spermatozoa positive for 8-oxodG. In conclusion, aging is associated with differential regulation of DNA repair pathways with a decrease in the BER pathway leading to deficient repair of 8-oxo-dG lesions in germ cells and spermatozoa.
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Affiliation(s)
- Catriona Paul
- Departments of Pharmacology and Therapeutics, McGill University, Montréal, Quebec, Canada
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Robinet JJ, Dokainish HM, Paterson DJ, Gauld JW. A Sulfonium Cation Intermediate in the Mechanism of Methionine Sulfoxide Reductase B: A DFT Study. J Phys Chem B 2011; 115:9202-12. [DOI: 10.1021/jp111681e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jesse J. Robinet
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Hisham. M. Dokainish
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - David J. Paterson
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - James W. Gauld
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
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Tong M, Zhang L, Wang Y, Jiang H, Ren Y. Fe-chlorophyllin promotes the growth of wheat roots associated with nitric oxide generation. Int J Mol Sci 2010; 11:5246-55. [PMID: 21614205 PMCID: PMC3100840 DOI: 10.3390/ijms11125246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 12/07/2010] [Accepted: 12/14/2010] [Indexed: 11/30/2022] Open
Abstract
Effects of Fe-chlorophyllin on the growth of wheat root were investigated in this study. We found that Fe-chlorophyllin can promote root growth. The production of nitric oxide in wheat root was detected using DAF-2DA fluorescent emission. The intensity of fluorescent in the presence of 0.1 mg/L Fe-chlorophyllin was near to that observed with the positive control of sodium nitroprusside (SNP), the nitric oxide donor. IAA oxidase activity decreased with all treatments of Fe-chlorophyllin from 0.01 to 10 mg/L. At the relatively lower Fe-chlorophyllin concentration of 0.1 mg/L, the activity of IAA oxidase displayed a remarkable decrease, being 40.1% lower than the control. Meanwhile, Fe-chlorophyllin treatment could increase the activities of reactive oxygen scavenging enzymes, such as superoxide dismutase (SOD) and peroxidase (POD), as determined using non-denaturing polyacrylamide gel electrophoresis. These results indicate that Fe-chlorophyllin contributes to the growth of wheat root associated with nitric oxide generation.
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Affiliation(s)
| | - Liefeng Zhang
- Authors to whom correspondence should be addressed; E-Mails: (L.Z.); (Y.R.); Tel. +86-25-8589-1591; Fax: +86-25-8589-1591
| | | | | | - Yong Ren
- Authors to whom correspondence should be addressed; E-Mails: (L.Z.); (Y.R.); Tel. +86-25-8589-1591; Fax: +86-25-8589-1591
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Sheu WS, Chiou MF. Potential Energy Surface of O2−(H2O) and Factors Controlling Water-to-O2− Binding Motifs. J Phys Chem A 2010; 115:99-104. [DOI: 10.1021/jp110264x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wen-Shyan Sheu
- Department of Chemistry, Fu-Jen Catholic University, Taipei, Taiwan 242, Republic of China
| | - Mong-Feng Chiou
- Department of Chemistry, Fu-Jen Catholic University, Taipei, Taiwan 242, Republic of China
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Vasilaki A, van der Meulen JH, Larkin L, Harrison DC, Pearson T, Van Remmen H, Richardson A, Brooks SV, Jackson MJ, McArdle A. The age-related failure of adaptive responses to contractile activity in skeletal muscle is mimicked in young mice by deletion of Cu,Zn superoxide dismutase. Aging Cell 2010; 9:979-90. [PMID: 20883524 PMCID: PMC3437493 DOI: 10.1111/j.1474-9726.2010.00635.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
In muscle, aging is associated with a failure of adaptive responses to contractile activity, and this is hypothesized to play an important role in age-related loss of muscle mass and function. Mice lacking the Cu,Zn superoxide dismutase (Cu,ZnSOD, SOD1) show an accelerated, age-related loss of muscle mass and function. This work determined whether adult mice lacking Cu,ZnSOD (Sod1−/− mice) show a premature failure of adaptive responses to contractions in a similar manner to old wild-type (WT) mice. Adult Sod1−/− mice (6–8 months of age) had a ∼ 30% reduction in gastrocnemius muscle mass compared with age-matched WT mice. This lower muscle mass was associated with an activation of DNA binding by NFκB and AP-1 at rest. Measurements of the activity of reactive oxygen species (ROS) in single fibres from the muscles of Sod1−/− mice at rest indicated an elevation in activity compared with fibres from WT mice. Following 15 min of isometric contractions, muscle fibres from WT mice showed an increase in the intracellular ROS activities and activation of NFκB and AP-1, but no changes in either ROS activity or NFκB and AP-1 activation were seen in the muscles of Sod1−/− mice following contractions. This pattern of changes mimics that seen in the muscles of old WT mice, suggesting that the attenuated responses to contractile activity seen in old mice result from chronic exposure to increased oxidant activity. Data support the use of the Sod1−/− mouse model to evaluate potential mechanisms that contribute to the loss of muscle mass and function in the elderly.
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Affiliation(s)
- Aphrodite Vasilaki
- School of Clinical Sciences, University of LiverpoolLiverpool L69 3GA, UK
| | | | - Lisa Larkin
- Institute of Gerontology, University of MichiganAnn Arbor, MI, USA
| | - Dawn C Harrison
- School of Clinical Sciences, University of LiverpoolLiverpool L69 3GA, UK
| | - Timothy Pearson
- School of Clinical Sciences, University of LiverpoolLiverpool L69 3GA, UK
| | | | | | - Susan V Brooks
- Institute of Gerontology, University of MichiganAnn Arbor, MI, USA
| | - Malcolm J Jackson
- School of Clinical Sciences, University of LiverpoolLiverpool L69 3GA, UK
| | - Anne McArdle
- School of Clinical Sciences, University of LiverpoolLiverpool L69 3GA, UK
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Smietana MJ, Arruda EM, Faulkner JA, Brooks SV, Larkin LM. Reactive oxygen species on bone mineral density and mechanics in Cu,Zn superoxide dismutase (Sod1) knockout mice. Biochem Biophys Res Commun 2010; 403:149-53. [PMID: 21056548 DOI: 10.1016/j.bbrc.2010.11.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Accepted: 11/01/2010] [Indexed: 01/19/2023]
Abstract
Reactive oxygen species (ROS) play a role in a number of degenerative conditions including osteoporosis. Mice deficient in Cu,Zn-superoxide dismutase (Sod1) (Sod1(-/-) mice) have elevated oxidative stress and decreased muscle mass and strength compared to wild-type mice (WT) and appear to have an accelerated muscular aging phenotype. Thus, Sod1(-/-) mice may be a good model for evaluating the effects of free radical generation on diseases associated with aging. In this experiment, we tested the hypothesis that the structural integrity of bone as measured by bending stiffness (EI; N/mm(2)) and strength (MPa) is diminished in Sod1(-/-) compared to WT mice. Femurs were obtained from male and female WT and Sod1(-/-) mice at 8months of age and three-point bending tests were used to determine bending stiffness and strength. Bones were also analyzed for bone mineral density (BMD; mg/cc) using micro-computed tomography. Femurs were approximately equal in length across all groups, and there were no significant differences in BMD or EI with respect to gender in either genotype. Although male and female mice demonstrated similar properties within each genotype, Sod1(-/-) mice exhibited lower BMD and EI of femurs from both males and females compared with gender matched WT mice. Strength of femurs was also lower in Sod1(-/-) mice compared to WT as well as between genders. These data indicate that increased oxidative stress, due to the deficiency of Sod1 is associated with decreased bone stiffness and strength and Sod1(-/-) mice may represent an appropriate model for studying disease processes in aging bone.
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Affiliation(s)
- Michael J Smietana
- Biomedical Engineering, University of Michigan, 2025 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA
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Chemical investigation of different crude extracts from Teucrium ramosissimum leaves. Correlation with their antigenotoxic and antioxidant properties. Food Chem Toxicol 2010; 49:191-201. [PMID: 20965226 DOI: 10.1016/j.fct.2010.10.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 09/20/2010] [Accepted: 10/13/2010] [Indexed: 11/23/2022]
Abstract
The effect of extracts obtained from Teucrium ramosissimum leaves on genotoxicity and SOS response induced by aflatoxin B(1) (0.5 μg/assay) as well as nitrofurantoin (5 μg/assay) was investigated in a bacterial assay system, i.e., the SOS chromotest with Escherichia coli PQ37. The T. ramosissimum tested extracts exhibited no genotoxicity either with or without the external S9 activation mixture. However, all the extracts, particularly the total oligomers flavonoids (TOF) extract significantly decreased the genotoxicity induced by aflatoxin B(1) and nitrofurantoin. Antioxidant capacity of the tested extracts was evaluated using the enzymatic (xanthine/xanthine oxidase assay) (X/XOD) and the non-enzymatic (NBT/Riboflavine assay) systems. TOF extract was the most effective one in inhibiting both xanthine oxidase activity and NBT reduction. Our findings emphasize the potential of T. ramosissimum to prevent mutations and also its antioxidant effect.
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Kędziora-Kornatowska K, Czuczejko J, Motyl J, Szewczyk-Golec K, Kozakiewicz M, Pawluk H, Kędziora J, Błaszczak R, Banach M, Rysz J. Effects of coenzyme Q10 supplementation on activities of selected antioxidative enzymes and lipid peroxidation in hypertensive patients treated with indapamide. A pilot study. Arch Med Sci 2010; 6:513-8. [PMID: 22371793 PMCID: PMC3284064 DOI: 10.5114/aoms.2010.14461] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 06/28/2010] [Accepted: 07/19/2010] [Indexed: 12/22/2022] Open
Abstract
INTRODUCTION An increase in oxidative stress is strongly documented in hypertensive patients. In blood vessels, oxidative stress increases the production of superoxide anion (O(2) (•-)) that reacts with nitric oxide (NO) and impairs the ability of endothelium to relax. Many reports indicate a beneficial effect of coenzyme Q10 (CoQ) in hypertension. Coenzyme Q10 therapy may lower O(2) (•-) and thus decrease the complications associated with hypertension. The aim of our study was to evaluate the effects of CoQ supplementation on antioxidative enzyme activities and lipid peroxidation in elderly hypertensive patients. MATERIAL AND METHODS We determined the activities of superoxide dismutase (SOD-1) and glutathione peroxidase (GSH-Px) and the concentration of malondialdehyde (MDA) in erythrocytes of 27 elderly (mean age 72.5 ±6.1 year) hypertensive patients treated with indapamide at baseline and after 12 weeks of CoQ supplementation (60 mg twice a day) in comparison with 30 healthy elderly volunteers (mean age 76.8 ±8.5 year). RESULTS Decrease of SOD-1 (p < 0.001) and insignificant reduction of GSH-Px activities and increase of MDA (p < 0.001) level were observed in hypertensive patients in comparison to healthy volunteers before supplementation. Coenzyme Q10 administration resulted in a significant increase only in SOD-1 activity (p < 0.001). CONCLUSIONS The present study indicates that CoQ improves the most important component of the antioxidant defence system - SOD-1, which is responsible for O(2) (•-) scavenging. Coenzyme Q10 may be used as an additional therapeutic agent for prophylaxis and treatment of hypertension in elderly patients.
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Affiliation(s)
| | - Jolanta Czuczejko
- Department of Biochemistry, Nicolaus Copernicus University Collegium Medicum, Bydgoszcz, Poland
| | - Jadwiga Motyl
- Department and Clinic of Geriatrics, Nicolaus Copernicus University Collegium Medicum, Bydgoszcz, Poland
| | - Karolina Szewczyk-Golec
- Department of Biochemistry, Nicolaus Copernicus University Collegium Medicum, Bydgoszcz, Poland
| | - Mariusz Kozakiewicz
- Department of Biochemistry, Nicolaus Copernicus University Collegium Medicum, Bydgoszcz, Poland
| | - Hanna Pawluk
- Department of Biochemistry, Nicolaus Copernicus University Collegium Medicum, Bydgoszcz, Poland
| | - Józef Kędziora
- Department of Biochemistry, Nicolaus Copernicus University Collegium Medicum, Bydgoszcz, Poland
| | - Robert Błaszczak
- Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, Poland
| | - Maciej Banach
- Department of Hypertension, Medical University of Lodz, Poland
| | - Jacek Rysz
- Department of Nephrology, Hypertension and Family Medicine, Medical University of Lodz, Poland
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Özen T, Türkekul İ. Antioxidant activities of Sarcodon imbricatum wildly grown in the Black Sea Region of Turkey. Pharmacogn Mag 2010; 6:89-97. [PMID: 20668572 PMCID: PMC2900068 DOI: 10.4103/0973-1296.62892] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2010] [Revised: 02/21/2010] [Accepted: 05/05/2010] [Indexed: 11/23/2022] Open
Abstract
The antioxidant activities of the methanol extract of Sarcodon imbricatum wildly grown in the Black Sea Region of Turkey were investigated in this study. Antioxidant activities were evaluated in terms of total antioxidant activity, reducing power, metal chelating ability, inhibition of linoleic acid peroxidation, superoxide, peroxide and hydrogen peroxide scavenging effects. Various antioxidant activities were compared to references antioxidants such as alpha-tocopherol, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), and trolox. In total antioxidant (12674.45 mumol alpha-tocopherol/g of extract), superoxide scavenging (53.74%) and peroxide scavenging activity (45.73%), the methanol extract of Sarcodon imbricatum showed stronger activity patterns than that of references antioxidants. Reducing power, metal chelating activity and free radical (DPPH(*)) scavenging activity was increased with the increasing concentration. The contents of total phenolic, flavonoid, anthocyanin, ascorbic acid, beta-carotene and lycopene of Sarcodon imbricatum were determined and found to be noteworthy.
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Affiliation(s)
- Tevfik Özen
- Giresun University, Faculty of Arts and Sciences, Department of Chemistry, 28100 Giresun, Turkey
| | - İbrahim Türkekul
- Gaziosmanpaşa University, Faculty of Arts and Sciences, Department of Biology, 60050 Tokat, Turkey
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Wisniowski PB, Hug GL, Pogocki D, Bobrowski K. Efficient α-(Alkylthio)alkyl-Type Radical Formation in •OH-Induced Oxidation of α-(Methylthio)acetamide. J Phys Chem A 2009; 114:105-16. [DOI: 10.1021/jp9071026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Pawel B Wisniowski
- Centre of Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, 03-195 Warsaw, Poland
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Dani C, Oliboni LS, Umezu FM, Pasquali MA, Salvador M, Moreira JCF, Henriques JAP. Antioxidant and Antigenotoxic Activities of Purple Grape Juice—Organic and Conventional—in Adult Rats. J Med Food 2009; 12:1111-8. [DOI: 10.1089/jmf.2008.0256] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Caroline Dani
- Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Lívia S. Oliboni
- Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Fernanda M. Umezu
- Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Matheus A.B. Pasquali
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Mirian Salvador
- Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - José Cláudio Fonseca Moreira
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Srikanth R, Wilson J, Vachet RW. Correct identification of oxidized histidine residues using electron-transfer dissociation. JOURNAL OF MASS SPECTROMETRY : JMS 2009; 44:755-62. [PMID: 19160434 PMCID: PMC2737336 DOI: 10.1002/jms.1552] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Oxidative modification to the side chain of histidine can noticeably change the collision-induced dissociation (CID) pathways of peptides containing this oxidized residue. In cases where an oxidized peptide consists two or more isomers differing only in the site of modification, oxidation to histidine usually causes the other oxidized sites to be mis-assigned in CID spectra. These spectral misassignments can sometimes be avoided by using multiple stages of MS/MS (MS(n)) or via specially optimized liquid chromatographic separation conditions. In this manuscript, we demonstrate that these misassignments can be more readily and easily avoided by using electron-transfer dissociation (ETD) to dissociate the oxidized peptides. Furthermore, we find that the relative insensitivity of ETD to side-chain chemistry allows the extent of oxidative modification to be determined readily for peptide isomers having more than one site of oxidation. The current results along with previous studies of oxidized peptides suggest that ETD is probably a better technique than CID for obtaining correct sequence and modification information for oxidized peptides.
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Affiliation(s)
- Rapole Srikanth
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA
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Li J, Hou H, Wang B. Ab Initio Molecular Dynamics Study of the Electronic Structure of Superoxide Radical Anion in Solution. J Phys Chem A 2009; 113:800-4. [DOI: 10.1021/jp809270d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jicun Li
- College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Hua Hou
- College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Baoshan Wang
- College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
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Yoo KY, Park OK, Yu J, Yan B, Li H, Lee CH, Choi JH, Kim DW, Hwang IK, Won MH. Expression and changes of hyperoxidized peroxiredoxins in non-pyramidal and polymorphic cells in the gerbil hippocampus during normal aging. Cell Mol Neurobiol 2008; 29:413-21. [PMID: 19089611 DOI: 10.1007/s10571-008-9333-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2008] [Accepted: 11/19/2008] [Indexed: 12/29/2022]
Abstract
Oxidative stress is one of predisposing factors to age-related neurodegeneration in the brain. In particular, thiol-containing groups are susceptible to oxidative stress, which induces the formation of the disulfide bond and/or hyperoxidized form of thiol-containing proteins. We observed the protein thiol levels in the hippocampal homogenates and also investigated changes in hyperoxidized form of peroxiredoxin (Prx-SO(3)) immunoreactivity and proteins levels in the gerbil hippocampal subregions during normal aging. Levels of total thiol, non-protein thiol, and protein thiol were decreased in the hippocampal homogenates with age. At post-natal month 1 (PM 1), pyramidal and non-pyramidal cells in the hippocampal CA1 region (CA1) showed Prx-SO(3) immunoreactivity. Prx-SO(3) immunoreactivity in the cells was decreased by PM 12, thereafter, Prx-SO(3) immunoreactivity in the cells increased again with age. In the CA2/3, Prx-SO(3) immunoreactivity in pyramidal cells was not significantly changed; however, the immunoreactivity in pyramidal cells was very low at PM 12. Prx-SO(3) immunoreactivity in the dentate gyrus (DG) was distinctly changed during aging. At PM 1, Prx-SO(3) immunoreactivity in granule and polymorphic cells was weak and strong, respectively. The immunoreactivity in the neurons was decreased with age, not shown in any neurons at PM 12. Thereafter, Prx-SO(3) immunoreactivity increased again with age. In addition, Prx-SO(3) protein level in the hippocampus was lowest at PM 12. These results suggest that thiol-containing proteins are changed during aging and Prx-SO(3) immunoreactivity was different according to cells in the hippocampal subregion during aging.
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Affiliation(s)
- Ki-Yeon Yoo
- Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon, 200-702, South Korea
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Marian MJ, Mukhopadhyay P, Borchman D, Tang D, Paterson CA. The effect of hydrogen peroxide on sarco/endoplasmic and plasma membrane calcium ATPase gene expression in cultured human lens epithelial cells. Open Ophthalmol J 2008; 2:123-9. [PMID: 19517033 PMCID: PMC2694599 DOI: 10.2174/1874364100802010123] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2008] [Revised: 06/09/2008] [Accepted: 06/17/2008] [Indexed: 11/22/2022] Open
Abstract
The loss of calcium homeostasis in the lens of the eye appears to be a factor contributing to lens opacity. In the human lens, calcium homeostasis depends on the Ca2+-ATPase pumps found only in the epithelium. A plasma membrane calcium pump, PMCA2 is upregulated in human cataractous lenses. To determine if oxidation caused the plasma membrane Ca2+-ATPases (PMCA) or sarcoplasmic/endoplasmic Ca2+-ATPases (SERCA) to become upregulated, we cultured a human lens epithelial cell line, in the presence of hydrogen peroxide. We observed an increase in PMCA1, PMCA2 SERCA2b and SERCA3 mRNA levels and protein expression with increasing hydrogen peroxide concentrations and treatment times. Hydrogen peroxide caused a rise in the intracellular calcium which could be an initiating factor in the concerted upregulation of PMCA1 and SERCA3. Our data support the idea that oxidative stress could contribute to a selective rise in PMCA/SERCA expression in human cataractous lenses.
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Affiliation(s)
- M J Marian
- Department of Biochemistry and Molecular Biology, University of Louisville School of Medicine, Louisville, KY 40202, USA
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