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Šetinc M, Zajc Petranović M, Slivšek G, Mijač S, Celinščak Ž, Stojanović Marković A, Bišof V, Peričić Salihović M, Škarić-Jurić T. Genes Involved in DNA Damage Cell Pathways and Health of the Oldest-Old (85+). Genes (Basel) 2023; 14:1806. [PMID: 37761946 PMCID: PMC10530973 DOI: 10.3390/genes14091806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Some sources report a connection of cellular senescence with chronic pathological conditions; however, the association between particular cellular processes and general health is rarely examined. This study aims to test the relationship of general health with DNA damage pathways that play a crucial role in senescence. The association of ten selected SNPs with subjective and objective general health and functional ability indicators has been tested in 314 oldest-old people from Croatia. Multivariate logistic regression was employed to simultaneously test the impact of variables potentially influencing targeted health and functional ability variables. The best model, explaining 37.1% of the variance, has six independent significant predictors of functional ability scores: rs16847897 in TERC, rs533984 in MRE11A, and rs4977756 in CDKN2B, chronic disease count, Mini-Mental State Examination scores, and age at surveying. In conclusion, the examined ten loci involved in DNA damage repair pathways showed a more significant association with self-rated health and functional ability than with the number of disease or prescribed medicaments. The more frequent, longevity-related homozygote (GG) in rs16847897 was associated with all three aspects of self-assessments-health, mobility, and independence-indicating that this TERC locus might have a true impact on the overall vitality of the oldest-old persons.
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Affiliation(s)
- Maja Šetinc
- Institute for Anthropological Research, 10000 Zagreb, Croatia; (M.Š.); (Ž.C.); (A.S.M.); (M.P.S.); (T.Š.-J.)
| | - Matea Zajc Petranović
- Institute for Anthropological Research, 10000 Zagreb, Croatia; (M.Š.); (Ž.C.); (A.S.M.); (M.P.S.); (T.Š.-J.)
| | - Goran Slivšek
- Faculty of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (G.S.); (S.M.); (V.B.)
| | - Sandra Mijač
- Faculty of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (G.S.); (S.M.); (V.B.)
- Department of Science and Research, Children’s Hospital Srebrnjak, 10000 Zagreb, Croatia
| | - Željka Celinščak
- Institute for Anthropological Research, 10000 Zagreb, Croatia; (M.Š.); (Ž.C.); (A.S.M.); (M.P.S.); (T.Š.-J.)
| | - Anita Stojanović Marković
- Institute for Anthropological Research, 10000 Zagreb, Croatia; (M.Š.); (Ž.C.); (A.S.M.); (M.P.S.); (T.Š.-J.)
| | - Vesna Bišof
- Faculty of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (G.S.); (S.M.); (V.B.)
- Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Marijana Peričić Salihović
- Institute for Anthropological Research, 10000 Zagreb, Croatia; (M.Š.); (Ž.C.); (A.S.M.); (M.P.S.); (T.Š.-J.)
| | - Tatjana Škarić-Jurić
- Institute for Anthropological Research, 10000 Zagreb, Croatia; (M.Š.); (Ž.C.); (A.S.M.); (M.P.S.); (T.Š.-J.)
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Sun Y, Yu X, Gao X, Zhang C, Sun H, Xu K, Wei D, Wang Q, Zhang H, Shi Y, Li L, He X. RNA sequencing profiles reveal dynamic signaling and glucose metabolic features during bone marrow mesenchymal stem cell senescence. Cell Biosci 2022; 12:62. [PMID: 35568915 PMCID: PMC9107734 DOI: 10.1186/s13578-022-00796-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 04/22/2022] [Indexed: 11/30/2022] Open
Abstract
Background Stem cell senescence is considered as a significant driver of organismal aging. As individuals age, the number of stem cells is declined, and the ability to proliferate and survive is also weakened. It has been reported that metabolism plays an important role in stem cell self-renewal, multilineage differentiation, senescence and fate determination, which has aroused widespread concerns. However, whether metabolism-related genes or signalling pathways are involved in physiological aging remain largely undetermined. Results In the current study, we showed 868 up-regulated and 2006 down-regulated differentially expressed genes (DEGs) in bone marrow mesenchymal stem cells (MSCs) from old rats in comparison with that from young rats by performing RNA sequence. And DEGs functions and pathways were further selected by function enrichment analysis. The results indicated that the high expression of DEGs might participate in cell differentiation, growth factor binding and etc., while the down-regulated DEGs were majorly enriched in metabolism process, such as the cellular metabolic process and mitochondria. Then, we screened and verified DEGs related to glucose metabolism and investigated the glycolysis levels. We identified that glucose uptake, lactate secretion, ATP production and relative extracellular acidification rates (ECAR) were all diminished in MSCs from old rats. More importantly, we conducted microRNA prediction on the key DEGs of glycolysis to elucidate the potential molecular mechanisms of glucose metabolism affecting MSC senescence. Conclusions Our study unravelled the profiles of DEGs in age-associated MSC senescence and their functions and pathways. We also clarified DEGs related to glucose metabolism and down-regulated glycolysis level in age-associated MSC senescence. This study will uncover the metabolic effects on regulating stem cell senescence, and provide novel therapeutic targets for ameliorating age-associated phenotypes. Supplementary Information The online version contains supplementary material available at 10.1186/s13578-022-00796-5.
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Kadota Y, Yano A, Kawakami T, Sato M, Suzuki S. Metabolomic profiling of plasma from middle-aged and advanced-age male mice reveals the metabolic abnormalities of carnitine biosynthesis in metallothionein gene knockout mice. Aging (Albany NY) 2021; 13:24963-24988. [PMID: 34851303 PMCID: PMC8714139 DOI: 10.18632/aging.203731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 11/22/2021] [Indexed: 12/30/2022]
Abstract
Metallothionein (MT) is a family of low molecular weight, cysteine-rich proteins that regulate zinc homeostasis and have potential protective effects against oxidative stress and toxic metals. MT1 and MT2 gene knockout (MTKO) mice show shorter lifespans than wild-type (WT) mice. In this study, we aimed to investigate how MT gene deficiency accelerates aging. We performed comparative metabolomic analyses of plasma between MTKO and WT male mice at middle age (50-week-old) and advanced age (100-week-old) using liquid chromatography with time-of-flight mass spectrometry (LC-TOF-MS). The concentration of N6,N6,N6-trimethyl-L-lysine (TML), which is a metabolic intermediate in carnitine biosynthesis, was consistently higher in the plasma of MTKO mice compared to that of WT mice at middle and advanced age. Quantitative reverse transcription PCR (RT-PCR) analysis revealed remarkably lower mRNA levels of Tmlhe, which encodes TML dioxygenase, in the liver and kidney of male MTKO mice compared to that of WT mice. L-carnitine is essential for β-oxidation of long-chain fatty acids in mitochondria, the activity of which is closely related to aging. Our results suggest that reduced carnitine biosynthesis capacity in MTKO mice compared to WT mice led to metabolic disorders of fatty acids in mitochondria in MTKO mice, which may have caused shortened lifespans.
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Affiliation(s)
- Yoshito Kadota
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Asuka Yano
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Takashige Kawakami
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Masao Sato
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Shinya Suzuki
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
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Sekovanić A, Jurasović J, Piasek M. Metallothionein 2A gene polymorphisms in relation to diseases and trace element levels in humans. Arh Hig Rada Toksikol 2020; 71:27-47. [PMID: 32597135 PMCID: PMC7837243 DOI: 10.2478/aiht-2020-71-3349] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/01/2019] [Accepted: 03/01/2020] [Indexed: 02/08/2023] Open
Abstract
Human metallothioneins are a superfamily of low molecular weight intracellular proteins, whose synthesis can be induced by essential elements (primarily Zn and Cu), toxic elements and chemical agents, and stress-producing conditions. Of the four known isoforms in the human body MT2 is the most common. The expression of metallothioneins is encoded by a multigene family of linked genes and can be influenced by single nucleotide polymorphisms (SNPs) in these genes. To date, 24 SNPs in the MT2A gene have been identified with the incidence of about 1 % in various population groups, and three of them were shown to affect physiological and pathophysiological processes. This review summarises current knowledge about these three SNPs in the MT2A gene and their associations with element concentrations in the body of healthy and diseased persons. The most investigated SNP is rs28366003 (MT2A -5 A/G). Reports associate it with longevity, cancer (breast, prostate, laryngeal, and in paranasal sinuses), and chronic renal disease. The second most investigated SNP, rs10636 (MT2A +838G/C), is associated with breast cancer, cardiovascular disease, and type 2 diabetes. Both are also associated with several metal/metalloid concentrations in the organism. The third SNP, rs1610216 (MT2A -209A/G), has been studied for association with type 2 diabetes, cardiomyopathy, hyperglycaemia, and Zn concentrations. Metallothionein concentrations and MT2A polymorphisms have a potential to be used as biomarkers of metal exposure and clinical markers of a number of chronic diseases. This potential needs to be studied and verified in a large number of well-defined groups of participants (several hundreds and thousands) with a focus on particular physiological or pathological condition and taking into consideration other contributing factors, such as environmental exposure and individual genetic and epigenetic makeup.
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Affiliation(s)
- Ankica Sekovanić
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health,Zagreb, Croatia
| | - Jasna Jurasović
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health,Zagreb, Croatia
| | - Martina Piasek
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health,Zagreb, Croatia
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Zhao W, Cheng L, Quek C, Bellingham SA, Hill AF. Novel miR-29b target regulation patterns are revealed in two different cell lines. Sci Rep 2019; 9:17449. [PMID: 31767948 PMCID: PMC6877611 DOI: 10.1038/s41598-019-53868-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 11/06/2019] [Indexed: 12/26/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small non-coding RNAs that regulate gene or protein expression by targeting mRNAs and triggering either translational repression or mRNA degradation. Distinct expression levels of miRNAs, including miR-29b, have been detected in various biological fluids and tissues from a large variety of disease models. However, how miRNAs "react" and function in different cellular environments is still largely unknown. In this study, the regulation patterns of miR-29b between human and mouse cell lines were compared for the first time. CRISPR/Cas9 gene editing was used to stably knockdown miR-29b in human cancer HeLa cells and mouse fibroblast NIH/3T3 cells with minimum off-targets. Genome editing revealed mir-29b-1, other than mir-29b-2, to be the main source of generating mature miR-29b. The editing of miR-29b decreased expression levels of its family members miR-29a/c via changing the tertiary structures of surrounding nucleotides. Comparing transcriptome profiles of human and mouse cell lines, miR-29b displayed common regulation pathways involving distinct downstream targets in macromolecular complex assembly, cell cycle regulation, and Wnt and PI3K-Akt signalling pathways; miR-29b also demonstrated specific functions reflecting cell characteristics, including fibrosis and neuronal regulations in NIH/3T3 cells and tumorigenesis and cellular senescence in HeLa cells.
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Affiliation(s)
- Wenting Zhao
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
- Department of Biochemistry and Molecular Biology, Bio21 Institute, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Lesley Cheng
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Camelia Quek
- Department of Biochemistry and Molecular Biology, Bio21 Institute, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Shayne A Bellingham
- Department of Biochemistry and Molecular Biology, Bio21 Institute, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Andrew F Hill
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
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Sundermann EE, Hussain MA, Moore DJ, Horvath S, Lin DTS, Kobor MS, Levine A. Inflammation-related genes are associated with epigenetic aging in HIV. J Neurovirol 2019; 25:853-865. [PMID: 31286441 DOI: 10.1007/s13365-019-00777-4] [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] [Received: 01/11/2019] [Revised: 06/11/2019] [Accepted: 06/18/2019] [Indexed: 12/14/2022]
Abstract
Chronic inflammation is characteristic of both HIV and aging ("inflammaging") and may contribute to the accelerated aging observed in people living with HIV (PLWH). We examined whether three inflammation-related single-nucleotide polymorphisms (SNPs) were risk factors for accelerated aging and HIV-associated, non-AIDS (HANA) conditions among PLWH. We examined 155 postmortem cases with HIV (mean age = 47.3, 81% male, 68% self-reported White) from the National NeuroAIDS Tissue Consortium who had pre-mortem neurobehavioral/medical/virologic data and epigenomic data from occipital cortex tissue. Accelerated aging was measured according to the Epigenetic Clock; an aging biomarker based on DNA methylation levels. Past or current age-associated HANA conditions including cerebrovascular, liver and kidney disease, chronic obstructive pulmonary disease, cancer, and diabetes were determined via self-report. Epigenetic Aging Z-scores and likelihood of past/current HANA conditions were compared between major allele homozygotes and minor allele carriers for each SNP (IL-6 - 174G>C, IL-10 - 592C>A, TNF-α - 308 G>A) separately. Analyses were adjusted for relevant demographic/clinical factors. Epigenetic aging (e.g., higher Z-scores) was significantly greater in IL-6 C allele carriers (p = .002) and IL-10 CC homozygotes (p = .02) compared to other genotype groups. The likelihood of any past/current HANA condition did not differ by IL-10 genotype but was 3.36 times greater in IL-6 C allele carriers versus others (OR = 3.36, 95%CI = 1.09-10.34, p = .03). TNF-α genotype was not associated with epigenetic aging or HANA conditions. IL-6 and IL-10 SNPs may help to identify PLWH who are at high risk for accelerated aging. These insights into pathophysiological pathways may inform interventional approaches to treat rapid aging among PLWH.
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Affiliation(s)
- Erin E Sundermann
- Department of Psychiatry, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA, 92093, USA.
| | - Mariam A Hussain
- Department of Psychiatry, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA, 92093, USA.,San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology, 6363 Alvarado Ct, San Diego, CA, 92120, USA
| | - David J Moore
- Department of Psychiatry, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA, 92093, USA
| | - Steven Horvath
- Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA.,Biostatistics, School of Public Health, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - David T S Lin
- The Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, V5Z 4H4, Canada
| | - Michael S Kobor
- The Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, BC, V5Z 4H4, Canada
| | - Andrew Levine
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
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Ou M, Liu S, Ma X, Xing X, He W, Gao H. IL‐6 promoter polymorphism increased risks of recurrent stroke in the young patients with moderate internal carotid artery stenosis. J Cell Biochem 2017; 119:2886-2890. [DOI: 10.1002/jcb.26467] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 10/31/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Minghui Ou
- Department of Vascular SurgeryPeople's Hospital of Ningxia Hui autonomous regionsYinchuanNingxiaChina
| | - Shunda Liu
- Department of NeurologyPeople's Hospital of Ningxia Hui Autonomous RegionsYinchuanNingxiaChina
- The First Affiliated Hospital of Northwest University for NationalitiesYinchuanNingxiaChina
| | - Xiaoping Ma
- Department of NeurologyPeople's Hospital of Ningxia Hui Autonomous RegionsYinchuanNingxiaChina
- The First Affiliated Hospital of Northwest University for NationalitiesYinchuanNingxiaChina
| | - Xiangluan Xing
- Department of NeurologyPeople's Hospital of Ningxia Hui Autonomous RegionsYinchuanNingxiaChina
- The First Affiliated Hospital of Northwest University for NationalitiesYinchuanNingxiaChina
| | - Wenting He
- Department of NeurologyPeople's Hospital of Ningxia Hui Autonomous RegionsYinchuanNingxiaChina
- The First Affiliated Hospital of Northwest University for NationalitiesYinchuanNingxiaChina
| | - Huanmin Gao
- Department of NeurologyPeople's Hospital of Ningxia Hui Autonomous RegionsYinchuanNingxiaChina
- The First Affiliated Hospital of Northwest University for NationalitiesYinchuanNingxiaChina
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Mammalian Metallothionein-2A and Oxidative Stress. Int J Mol Sci 2016; 17:ijms17091483. [PMID: 27608012 PMCID: PMC5037761 DOI: 10.3390/ijms17091483] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 08/19/2016] [Accepted: 08/24/2016] [Indexed: 01/01/2023] Open
Abstract
Mammalian metallothionein-2A (MT2A) has received considerable attention in recent years due to its crucial pathophysiological role in anti-oxidant, anti-apoptosis, detoxification and anti-inflammation. For many years, most studies evaluating the effects of MT2A have focused on reactive oxygen species (ROS), as second messengers that lead to oxidative stress injury of cells and tissues. Recent studies have highlighted that oxidative stress could activate mitogen-activated protein kinases (MAPKs), and MT2A, as a mediator of MAPKs, to regulate the pathogenesis of various diseases. However, the molecule mechanism of MT2A remains elusive. A deeper understanding of the functional, biochemical and molecular characteristics of MT2A would be identified, in order to bring new opportunities for oxidative stress therapy.
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Santos-Lozano A, Santamarina A, Pareja-Galeano H, Sanchis-Gomar F, Fiuza-Luces C, Cristi-Montero C, Bernal-Pino A, Lucia A, Garatachea N. The genetics of exceptional longevity: Insights from centenarians. Maturitas 2016; 90:49-57. [PMID: 27282794 DOI: 10.1016/j.maturitas.2016.05.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 05/03/2016] [Accepted: 05/09/2016] [Indexed: 01/07/2023]
Abstract
As the world population ages, so the prevalence increases of individuals aged 100 years or more, known as centenarians. Reaching this age has been described as exceptional longevity (EL) and is attributed to both genetic and environmental factors. Many genetic variations known to affect life expectancy exist in centenarians. This review of studies conducted on centenarians and supercentenarians (older than 110 years) updates knowledge of the impacts on longevity of the twenty most widely investigated single nucleotide polymorphisms (SNPs).
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Affiliation(s)
- Alejandro Santos-Lozano
- Research Institute of Hospital 12 de Octubre ('i+12'), Madrid, Spain; GIDFYS, Department of Health Sciences, European University Miguel de Cervantes, Valladolid, Spain
| | | | - Helios Pareja-Galeano
- Research Institute of Hospital 12 de Octubre ('i+12'), Madrid, Spain; European University of Madrid, Madrid, Spain
| | | | | | - Carlos Cristi-Montero
- IRyS Group, Physical Education School, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | | | - Alejandro Lucia
- Research Institute of Hospital 12 de Octubre ('i+12'), Madrid, Spain; European University of Madrid, Madrid, Spain
| | - Nuria Garatachea
- Research Institute of Hospital 12 de Octubre ('i+12'), Madrid, Spain; Departamento de Fisiatría y Enfermería, Facultad de Ciencias de la Salud y del Deporte, GENUD (Growth, Exercise, Nutrition and Development) research group, Instituto Agroalimentario de Aragón -IA2- (Universidad de Zaragoza-CITA), Zaragoza, Spain.
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Wei GZ, Wang F, Zhao YG, Li SS, Shi ML, Gao K, Luo Y, Tang WR. Association of longevity with TNF-α G308A and IL-6 G174C polymorphic inflammatory biomarkers in Caucasians: a meta-analysis. Z Gerontol Geriatr 2016; 49:706-713. [PMID: 26754162 DOI: 10.1007/s00391-015-0992-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 07/08/2015] [Accepted: 11/16/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Mutations in genes encoding tumor necrosis factor (TNF)-α and interleukin (IL)-6 were previously shown to affect mortality. Single nucleotide polymorphisms (SNPs) in the functional promoter regions of TNF-α (G308A) and IL-6 (G174C) are among the most widely studied. OBJECTIVES To determine whether TNF-α G308A and IL-6 G174C SNPs confer susceptibility to longevity, we performed a meta-analysis to comprehensively estimate the association between these SNPs and longevity in long-lived individuals (LLI, aged ≥ 80 years). MATERIALS AND METHODS Studies addressing the role of TNF-α and IL-6 SNPs in longevity were identified from the PubMed database. Pooled ORs with 95 % confidence intervals (CIs) were used to assess the association between SNPs and longevity. RESULTS The meta-analysis was based on four studies of TNF-α G308A and nine of IL-6 G174C, covering a total of 2945 LLI individuals and 2992 controls. Overall, no significantly increased risks were observed for G308A [A vs. G (additive model): OR = 0.98, 95 % CI = 0.79-1.22, p = 0.852; AA + AG vs. GG (dominant model): OR = 0.97, 95 % CI = 0.75-1.24, p = 0.791] or for G174C [C vs. G (additive model): OR = 1.07, 95 % CI = 0.94-1.22, p = 0.293; CC + CG vs. GG (dominant model): OR = 1.09, 95 % CI = 0.93-1.28, p = 0.299]. There was no change in the significance when a cutoff age of ≥ 90 years was introduced. CONCLUSIONS We found no evidence that the TNF-α G308A and IL-6 G174C SNPs affected the probability of reaching an advanced age in Caucasians, and that they have little effect on delaying the onset and progression of age-related diseases, but this does not rule out the possibility of population-specific effects caused by different genes and/or environmental factors and their interactions.
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Affiliation(s)
- Gan-Zhong Wei
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Fang Wang
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Yue-Guang Zhao
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Shan-Shan Li
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Min-Ling Shi
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Kang Gao
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Ying Luo
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China
| | - Wen-Ru Tang
- Laboratory of Molecular Genetics of Aging and Tumor, Medical Faculty, Kunming University of Science and Technology, Chenggong Campus, 727 South Jingming Road, Kunming, 650500, Yunnan, China.
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Inflammaging and Anti-Inflammaging: The Role of Cytokines in Extreme Longevity. Arch Immunol Ther Exp (Warsz) 2015; 64:111-26. [DOI: 10.1007/s00005-015-0377-3] [Citation(s) in RCA: 238] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 11/02/2015] [Indexed: 12/29/2022]
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Malavolta M, Orlando F, Piacenza F, Giacconi R, Costarelli L, Basso A, Lucarini G, Pierpaoli E, Provinciali M. Metallothioneins, longevity and cancer: Comment on "Deficiency of metallothionein-1 and -2 genes shortens the lifespan of the 129/Sv mouse strain". Exp Gerontol 2015; 73:28-30. [PMID: 26615880 DOI: 10.1016/j.exger.2015.11.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 11/01/2015] [Accepted: 11/22/2015] [Indexed: 02/04/2023]
Affiliation(s)
- M Malavolta
- Scientific and Technological pole, INRCA, Ancona, Italy.
| | - F Orlando
- Scientific and Technological pole, INRCA, Ancona, Italy
| | - F Piacenza
- Scientific and Technological pole, INRCA, Ancona, Italy
| | - R Giacconi
- Scientific and Technological pole, INRCA, Ancona, Italy
| | - L Costarelli
- Scientific and Technological pole, INRCA, Ancona, Italy
| | - A Basso
- Scientific and Technological pole, INRCA, Ancona, Italy
| | - G Lucarini
- Department of Molecular and Clinical Sciences, Histology, Polytechnic University of Marche Region, Ancona, Italy
| | - E Pierpaoli
- Scientific and Technological pole, INRCA, Ancona, Italy
| | - M Provinciali
- Scientific and Technological pole, INRCA, Ancona, Italy
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Starska K, Bryś M, Forma E, Olszewski J, Pietkiewicz P, Lewy-Trenda I, Stasikowska-Kanicka O, Danilewicz M, Krześlak A. Metallothionein 2A core promoter region genetic polymorphism and its impact on the risk, tumor behavior, and recurrences of sinonasal inverted papilloma (Schneiderian papilloma). Tumour Biol 2015; 36:8559-71. [PMID: 26036762 PMCID: PMC4672009 DOI: 10.1007/s13277-015-3616-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 05/26/2015] [Indexed: 01/20/2023] Open
Abstract
Inverted papillomas are a unique group of locally aggressive benign epithelial neoplasms in the nasal cavity and paranasal sinuses arising from the Schneiderian mucosa. Metallothioneins are sulfhydryl-rich heavy metal-binding proteins required for metal toxicity protection and regulation of biological mechanisms including proliferation and invasion. The goal of this study was to identify three SNPs at loci −5 A/G (rs28366003) and −209 A/G (rs1610216) in the core promoter region and at locus +838 C/G (rs10636) in 3′UTR region of the MT2A gene with IP risk and with tumor invasiveness according to Krouse staging. Genotyping was performed using the PCR restriction fragment length polymorphism technique in 130 genetically unrelated IP individuals, and 418 randomly selected healthy volunteers. The presence of the rs28366003 SNP was significantly related to the risk of IP within the present population-based case-control study. Compared to homozygous common allele carriers, heterozygosity and homozygosity for the G variant had a significantly increased risk of IP (adjusted odds ratio [OR] = 7.71, 95 % confidence interval [CI]: 4.01–14.91, pdominant < 0.001). Moreover, risk allele carriers demonstrated higher Krouse stage (pT1 vs. pT2-4) (OR = 19.32; 95 % CI, 2.30–173.53; p < 0.0001), diffuse tumor growth (OR = 4.58; 95 % CI, 1.70–12.11; p = 0.0008), bone destruction (OR = 4.13; 95 % CI, 1.50–11.60; p = 0.003), and higher incidence of tumor recurrences (OR = 5.11; 95 % CI, 1.68–15.20; p = 0.001). The findings suggest that MT2A gene variation rs28366003 may be implicated in the etiology of sinonasal inverted papilloma in a Polish population.
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Affiliation(s)
- Katarzyna Starska
- I Department of Otolaryngology and Laryngological Oncology, Medical University of Łódź, Kopcinskiego 22, 90-153, Łódź, Poland.
| | - Magdalena Bryś
- Department of Cytobiochemistry, University of Łódź, Pomorska 142/143, 90-236, Łódź, Poland
| | - Ewa Forma
- Department of Cytobiochemistry, University of Łódź, Pomorska 142/143, 90-236, Łódź, Poland
| | - Jurek Olszewski
- II Department of Otolaryngology and Laryngological Oncology, Medical University of Łódź, Żeromskiego 113, 90-549, Łódź, Poland
| | - Piotr Pietkiewicz
- II Department of Otolaryngology and Laryngological Oncology, Medical University of Łódź, Żeromskiego 113, 90-549, Łódź, Poland
| | - Iwona Lewy-Trenda
- Department of Pathology, Medical University of Łódź, Pomorska 251, 92-213, Łódź, Poland
| | | | - Marian Danilewicz
- Department of Pathology, Medical University of Łódź, Pomorska 251, 92-213, Łódź, Poland
| | - Anna Krześlak
- Department of Cytobiochemistry, University of Łódź, Pomorska 142/143, 90-236, Łódź, Poland
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Fuku N, He ZH, Sanchis-Gomar F, Pareja-Galeano H, Tian Y, Arai Y, Abe Y, Murakami H, Miyachi M, Zempo H, Naito H, Yvert T, Verde Z, Venturini L, Fiuza-Luces C, Santos-Lozano A, Rodriguez-Romo G, Ricevuti G, Hirose N, Emanuele E, Garatachea N, Lucia A. Exceptional longevity and muscle and fitness related genotypes: a functional in vitro analysis and case-control association replication study with SNPs THRH rs7832552, IL6 rs1800795, and ACSL1 rs6552828. Front Aging Neurosci 2015; 7:59. [PMID: 25999849 PMCID: PMC4422078 DOI: 10.3389/fnagi.2015.00059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 04/07/2015] [Indexed: 01/05/2023] Open
Abstract
There are several gene variants that are candidates to influence functional capacity in long-lived individuals. As such, their potential association with exceptional longevity (EL, i.e., reaching 100+ years) deserves analysis. Among them are rs7832552 in the thyrotropin-releasing hormone receptor (TRHR) gene, rs1800795 in the interleukin-6 (IL6) gene and rs6552828 in the coenzyme A synthetase long-chain 1 (ACSL1) gene. To gain insight into their functionality (which is yet unknown), here we determined for the first time luciferase gene reporter activity at the muscle tissue level in rs7832552 and rs6552828. We then compared allele/genotype frequencies of the 3 abovementioned variants among centenarians [n = 138, age range 100–111 years (114 women)] and healthy controls [n = 334, 20–50 years (141 women)] of the same ethnic and geographic origin (Spain). We also studied healthy centenarians [n = 79, 100–104 years (40 women)] and controls [n = 316, 27–81 years (156 women)] from Italy, and centenarians [n = 742, 100–116 years (623 women)] and healthy controls [n = 499, 23–59 years (356 women)] from Japan. The THRH rs7832552 T-allele and ACSL1 rs6552828 A-allele up-regulated luciferase activity compared to the C and G-allele, respectively (P = 0.001). Yet we found no significant association of EL with rs7832552, rs1800795 or rs6552828 in any of the 3 cohorts. Further research is needed with larger cohorts of centenarians of different origin as well as with younger old people.
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Affiliation(s)
- Noriyuki Fuku
- Graduate School of Health and Sports Science, Juntendo University Chiba, Japan
| | - Zi-Hong He
- Biology Centre, China Institute of Sport Science Beijing, China
| | | | - Helios Pareja-Galeano
- Research Institute of Hospital 12 de Octubre ("i+12") Madrid, Spain ; School of Doctorate Studies and Research, European University of Madrid Madrid, Spain
| | - Ye Tian
- Biology Centre, China Institute of Sport Science Beijing, China
| | - Yasumichi Arai
- Center for Supercentenarian Study, Keio University School of Medicine Tokyo, Japan
| | - Yukiko Abe
- Center for Supercentenarian Study, Keio University School of Medicine Tokyo, Japan
| | - Haruka Murakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition Tokyo, Japan
| | - Motohiko Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition Tokyo, Japan
| | - Hirofumi Zempo
- Graduate School of Health and Sports Science, Juntendo University Chiba, Japan
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University Chiba, Japan
| | - Thomas Yvert
- School of Doctorate Studies and Research, European University of Madrid Madrid, Spain
| | - Zoraida Verde
- School of Doctorate Studies and Research, European University of Madrid Madrid, Spain
| | | | - Carmen Fiuza-Luces
- School of Doctorate Studies and Research, European University of Madrid Madrid, Spain
| | | | | | | | - Nobuyoshi Hirose
- Center for Supercentenarian Study, Keio University School of Medicine Tokyo, Japan
| | - Enzo Emanuele
- Department of Health Sciences, University of Pavia Pavia, Italy
| | - Nuria Garatachea
- School of Doctorate Studies and Research, European University of Madrid Madrid, Spain ; Department of Physiotherapy and Nursing, Faculty of Health and Sport Science, University of Zaragoza Huesca, Spain
| | - Alejandro Lucia
- Research Institute of Hospital 12 de Octubre ("i+12") Madrid, Spain ; School of Doctorate Studies and Research, European University of Madrid Madrid, Spain
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Raudenska M, Gumulec J, Podlaha O, Sztalmachova M, Babula P, Eckschlager T, Adam V, Kizek R, Masarik M. Metallothionein polymorphisms in pathological processes. Metallomics 2014; 6:55-68. [PMID: 24068159 DOI: 10.1039/c3mt00132f] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Metallothioneins (MTs) are a class of metal-binding proteins characterized by a high cysteine content and low molecular weight. MTs play an important role in metal metabolism and protect cells against the toxic effects of radiation, alkylating agents and oxygen free radicals. The evidence that individual genetic characteristics of MTs play an important role in physiological and pathological processes associated with antioxidant defense and detoxification inspired targeted studies of genetic polymorphisms in a clinical context. In recent years, common MT polymorphisms were identified and associated with, particularly, western lifestyle diseases such as cancer, complications of atherosclerosis, and type 2 diabetes mellitus along with related complications. This review summarizes all evidence regarding MT polymorphisms of major human MTs (MT1, MT2, MT3 and MT4), their relation to pathological processes, and outlines specific applications of MTs as a set of genetic markers for certain pathologies.
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Affiliation(s)
- Martina Raudenska
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic.
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Starska K, Krześlak A, Forma E, Olszewski J, Lewy-Trenda I, Osuch-Wójcikiewicz E, Bryś M. Genetic polymorphism of metallothionein 2A and risk of laryngeal cancer in a Polish population. Med Oncol 2014; 31:75. [PMID: 24952512 DOI: 10.1007/s12032-014-0075-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 06/11/2014] [Indexed: 12/20/2022]
Abstract
Metallothioneins are intracellular regulators of many biological mechanisms including differentiation, proliferation, angiogenesis and invasion, which are crucial processes in carcinogenesis. This study examines the association between three single-nucleotide polymorphisms at loci -5 A/G (rs28366003) and -209 A/G (rs1610216) in the core promoter region and at locus +838 C/G (rs10636) in 3'UTR region of the metallothionein 2A (MT2A) gene with squamous cell laryngeal cancer (SCLC) risk, as well as with tumor invasiveness according to tumor front grading (TFG). Genotyping was performed using the polymerase chain reaction-restriction fragment length polymorphism technique in 323 genetically unrelated individuals with SCLC and 418 randomly selected healthy volunteers. Only one SNP (rs28366003) was significantly related to laryngeal cancer in the study population. Compared with homozygous common allele carriers, heterozygous and homozygous for the G variant had significantly increased risk of SCLC [adjusted odds ratio (OR) = 2.90, 95 % confidence interval (CI) 1.53-5.21, p dominant < 0.001]. The A/G allele carriers at rs28366003 MT2A were at higher risk of SCLC development (OR = 2.63, 95 % CI 1.41-2.85, p < 0.001]. There was a significant association between the rs28366003 and stage and TFG classification. Most carriers of minor allele had a higher stage (OR = 2.76, 95 % CI 1.11-7.52, p = 0.03), increased cancer aggressiveness, as defined by a higher total TFG score (>18 points) (OR = 3.76, 95 % CI 1.15-12.56, p = 0.03) and diffuse tumor growth (OR = 5.86, 95 % Cl 0.72-44.79, p = 0.08). The results of this study raise a possibility that a genetic variation of MT2A may be implicated in the etiology of laryngeal cancer in a Polish population.
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Affiliation(s)
- Katarzyna Starska
- I Department of Otolaryngology and Laryngological Oncology, Medical University of Łódź, Kopcinskiego 22, 90-153, Lodz, Poland,
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Kayaaltı Z, Kaya D, Bacaksız A, Söylemez E, Söylemezoğlu T. An association between polymorphism of the NADH/NADPH oxidase p22phox (phagocyte oxidase) subunit and aging in Turkish population. Aging Clin Exp Res 2013; 25:511-6. [PMID: 23949976 DOI: 10.1007/s40520-013-0129-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 04/16/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND AND AIMS Aging is a complex and multifactorial process that is stimulated by a number of factors including genes and life-style. It is thought that the production of reactive oxygen species (ROS) in the face of antioxidant enzymes and molecules is related to aging and age-related diseases. NAD(P)H oxidase system is the predominant cellular source of ROS, and p22phox, the major component of that system, is essential for the activation of NAD(P)H oxidase. The aim of this study was to investigate the association between p22phox C242T single nucleotide polymorphism and aging in Turkish population. METHODS Blood samples were collected from 332 volunteers between 18 and 95 years of age and were classified into three groups according to their ages as <65, 65-84 and ≥ 85. p22phox C242T polymorphism was genotyped by PCR-RFLP method. RESULTS CC genotype frequency in the C242T polymorphism is higher in older group (≥ 85) than younger groups (<65 and 65-85), whereas CT + TT genotype frequency is lower in older group. When the p22phox C242T polymorphism was compared with the mean ages and age groups, statistically significant associations were found. CONCLUSIONS We showed for the first time that human aging is significantly associated with p22phox C242T genotypes in Turkish population, being highest in CC, intermediate in CT, and lowest in TT homozygote. It is plausible to suggest that CC genotype might protect people from chronic inflammation, diseases as well as from oxidative stress and, thus, individuals with CC genotype might be more advantageous for aging as compared to those with CT + TT genotypes.
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18
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Malavolta M, Basso A, Piacenza F, Giacconi R, Costarelli L, Pierpaoli S, Mocchegiani E. Survival study of metallothionein-1 transgenic mice and respective controls (C57BL/6J): influence of a zinc-enriched environment. Rejuvenation Res 2012; 15:140-3. [PMID: 22533418 DOI: 10.1089/rej.2011.1261] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The role of metallothioneins (MTs) in aging is not completely understood. Several studies have shown evidence that these proteins could represent a defense system against oxidative damage, but survival studies on mice overexpressing MTs are poor. Here we describe a survival study performed on old MT-1-overexpressing mice (MT-TG) and their respective controls (C57BL/6J) fed a standard or zinc (Zn)-supplemented diet. MT-TG mice had significantly increased survival compared with control. Zn supplementation affects the survival curves of MT-TG and C57BL/6J mice differently. This study poses the basis for intervention based on gene therapy with MTs to enhance the health span of laboratory mice.
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Affiliation(s)
- Marco Malavolta
- Nutrition and Aging Centre, Scientific and Technological Pole INRCA, Ancona, Italy.
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19
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Sliwińska-Mossoń M, Milnerowicz H, Jabłonowska M, Milnerowicz S, Nabzdyk S, Rabczyński J. The effect of smoking on expression of IL-6 and antioxidants in pancreatic fluids and tissues in patients with chronic pancreatitis. Pancreatology 2012; 12:295-304. [PMID: 22898629 DOI: 10.1016/j.pan.2012.04.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 03/26/2012] [Accepted: 04/27/2012] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The present study was conducted to ascertain whether cigarette smoke induces oxidative stress in the human pancreas concurrently with inflammation. MATERIALS AND METHODS The influence of tobacco smoking on the serum level of interleukin-6 (IL-6), on the activities of glutathione peroxidase (GPx) and copper-zinc superoxide dismutase (Cu/Zn SOD) as well as on the metallothionein (MT) level in the pancreatic pseudocyst fluid and its immunohistochemical localization in tissues of non-smoking (n = 9) and smoking (n = 12) patients with diagnosed chronic pancreatitis (CP) was measured. The concentration of interleukin-6 and metallothionein was determined by means of ELISA and the radioisotopic method, respectively. The enzyme activities in the fluid were assayed by the colorimetric method. Samples of tissues of normal pancreas (n = 4) and CP (non-smoking n = 7; smoking n = 12) were verified histopathologically and then IL-6, MT and enzymes were localized by immunohistochemical staining using the monoclonal anti-human antibody. RESULTS The concentrations of metallothionein and interleukin-6 were significantly higher in smoking patients with CP (as compared with the non-smoking population (p < 0.01; p < 0.001). Interestingly, the ratio of MT/IL-6 in smoking patients with CP was reduced in comparison to non-smoking patients (respectively: 1.1; 5.6). In smoking patients, a significant elevation of the Cu/Zn SOD and GPx activities was revealed as compared with the non-smokers (p < 0.04; p < 0.0007). These studies clearly demonstrate a moderate and strong expression of IL-6 and enzymes in acinar, islet and duct cells of smoking patients. CONCLUSIONS These observations favor the role of the oxidative stress in the induction of pancreatitis associated with chronic cigarette smoke inhalation.
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Affiliation(s)
- Mariola Sliwińska-Mossoń
- Department of Biomedical and Environmental Analysis, Wrocław Medical University, Grunwaldzka 2, 50-355 Wroclaw, Poland.
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Kayaaltı Z, Tekin D, Aliyev V, Yalçın S, Kurtay G, Söylemezoğlu T. Effects of the interleukin-6 (IL-6) polymorphism on toxic metal and trace element levels in placental tissues. THE SCIENCE OF THE TOTAL ENVIRONMENT 2011; 409:4929-4933. [PMID: 21911244 DOI: 10.1016/j.scitotenv.2011.08.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 08/15/2011] [Accepted: 08/17/2011] [Indexed: 05/31/2023]
Abstract
The placenta is a crucial organ of fetal origin that functions in providing nutrients to the fetus from the mother. During pregnancy, the need for essential micronutrients, such as Fe and Zn, increases due to the requirements of the growing fetus. Maternal Fe deficiency induces an increase in Cu levels and can also affect cytokine levels in the placenta. On the other hand, Cu deficiency, although not as common, can also have destructive effects on the fetus. Interleukin-6 (IL-6) is a pleiotropic cytokine with a wide range of biological activities, including such as immune responses, acute-phase reactions, and inflammation. The placenta produces a significant amount of IL-6 during pregnancy. The effects of the IL-6 -174 G/C single nucleotide polymorphism (SNP) on IL-6 gene transcription and on plasma cytokine levels were assessed in the present study. We investigated the association between the IL-6 -174 G/C polymorphism and trace element/toxic metal levels in placental tissues. For the purposes of this study, 95 healthy volunteers were evaluated. Presence of the IL-6 polymorphism was determined using the standard polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) technique, and metal levels were analyzed by atomic absorption spectrometry (AAS). Based on our data, there were no significant associations between the IL-6 -174 G/C polymorphism and Pb, Cd, Fe, or Zn levels in the placental tissues (p>0.05), but a statistically significant association was detected between the polymorphism and Cu levels (p=0.016). We determined that the mean Cu levels in the placental tissues from individuals with GG, GC and CC genotypes were 5.62±1.98, 6.22±3.22 and 8.00±1.32 ppm, respectively, whereas the overall mean Cu level from the placental tissues was 5.98±2.51 ppm.
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Affiliation(s)
- Zeliha Kayaaltı
- Ankara University, Institute of Forensic Sciences, Dikimevi, 06590, Ankara, Turkey.
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The potential effect of metallothionein 2A -5A/G single nucleotide polymorphism on blood cadmium, lead, zinc and copper levels. Toxicol Appl Pharmacol 2011; 256:1-7. [PMID: 21767559 DOI: 10.1016/j.taap.2011.06.023] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 06/29/2011] [Accepted: 06/30/2011] [Indexed: 12/14/2022]
Abstract
Metallothioneins (MTs) are low molecular weight, cysteine-rich, metal-binding proteins. Because of their rich thiol groups, MTs bind to the biologically essential metals and perform these metals' homeostatic regulations; absorb the heavy metals and assist with their transportation and extraction. The aim of this study was to investigate the association between the metallothionein 2A (MT2A) core promoter region -5 A/G single nucleotide polymorphism (SNP) and Cd, Pb, Zn and Cu levels in the blood samples. MT2A polymorphism was determined by the standard polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique using the 616 blood samples and the genotype frequencies were found as 86.6% homozygote typical (AA), 12.8% heterozygote (AG) and 0.6% homozygote atypical (GG). Metal levels were analyzed by dual atomic absorption spectrophotometer system and the average levels of Cd, Pb, Zn and Cu in the blood samples were 1.69±1.57 ppb, 30.62±14.13 ppb, 0.98±0.49 ppm and 1.04±0.45 ppm, respectively. As a result; highly statistically significant associations were detected between the -5 A/G core promoter region SNP in the MT2A gene and Cd, Pb and Zn levels (p=0.004, p=0.012 and p=0.002, respectively), but no association was found with Cu level (p=0.595). Individuals with the GG genotype had statistically lower Zn level and higher Cd and Pb levels in the blood samples than individuals with AA and AG genotypes. This study suggests that having the GG genotype individuals may be more sensitive for the metal toxicity and they should be more careful about protecting their health against the toxic effects of the heavy metals.
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