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Galeano-Páez C, Ricardo-Caldera D, Jiménez-Vidal L, Peñata-Taborda A, Coneo-Pretelt A, Rumié-Mendoza M, Humanez Álvarez A, Salcedo-Arteaga S, Arteaga-Arroyo G, Pastor-Sierra K, Espitia-Pérez P, Avilés-Vergara PA, Tovar-Acero C, Soto-De León S, Brango H, Bru-Cordero OE, Jiménez-Narváez M, Stashenko EE, Gamboa-Delgado EM, Idrovo AJ, Espitia-Pérez L. Genetic Instability among Hitnü People Living in Colombian Crude-Oil Exploitation Areas. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11189. [PMID: 36141477 PMCID: PMC9517229 DOI: 10.3390/ijerph191811189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/10/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
Oil exploitation, drilling, transportation, and processing in refineries produces a complex mixture of chemical compounds, including polycyclic aromatic hydrocarbons (PAHs), which may affect the health of populations living in the zone of influence of mining activities (PZOI). Thus, to better understand the effects of oil exploitation activities on cytogenetic endpoint frequency, we conducted a biomonitoring study in the Hitnü indigenous populations from eastern Colombia by using the cytokinesis micronucleus cytome assay (CBMN-cyt). PAH exposure was also measured by determine urine 1-hydroxypyrene (1-OHP) using HPLC. We also evaluated the relationship between DNA damage and 1-OHP levels in the oil exploitation area, as well as the modulating effects of community health factors, such as Chagas infection; nutritional status; and consumption of traditional hallucinogens, tobacco, and wine from traditional palms. The frequencies of the CBMN-cyt assay parameters were comparable between PZOI and Hitnü populations outside the zone of influence of mining activities (POZOI); however, a non-significant incremental trend among individuals from the PZOI for most of the DNA damage parameters was also observed. In agreement with these observations, levels of 1-OHP were also identified as a risk factor for increased MN frequency (PR = 1.20) compared to POZOI (PR = 0.7). Proximity to oil exploitation areas also constituted a risk factor for elevated frequencies of nucleoplasmic bridges (NPBs) and APOP-type cell death. Our results suggest that genetic instability and its potential effects among Hitnü individuals from PZOI and POZOI could be modulated by the combination of multiple factors, including the levels of 1-OHP in urine, malnutrition, and some traditional consumption practices.
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Affiliation(s)
- Claudia Galeano-Páez
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Dina Ricardo-Caldera
- Grupo de Investigación Enfermedades Tropicales y Resistencia Bacteriana, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Luisa Jiménez-Vidal
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Ana Peñata-Taborda
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Andrés Coneo-Pretelt
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Margarita Rumié-Mendoza
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Alicia Humanez Álvarez
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Shirley Salcedo-Arteaga
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Gean Arteaga-Arroyo
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Karina Pastor-Sierra
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Pedro Espitia-Pérez
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Paula A. Avilés-Vergara
- Grupo de Investigación Enfermedades Tropicales y Resistencia Bacteriana, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Catalina Tovar-Acero
- Grupo de Investigación Enfermedades Tropicales y Resistencia Bacteriana, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Sara Soto-De León
- Grupo de Investigación Enfermedades Tropicales y Resistencia Bacteriana, Universidad del Sinú E.B.Z., Montería 230001, Colombia
| | - Hugo Brango
- Departamento de Matemáticas y Estadística, Universidad del Norte, Barranquilla 080001, Colombia
| | | | | | - Elena E. Stashenko
- Center for Chromatography and Mass Spectrometry (CROM-MASS), Universidad Industrial de Santander, Bucaramanga 680001, Colombia
| | - Edna M. Gamboa-Delgado
- Escuela de Nutrición y Dietética, Universidad Industrial de Santander, Bucaramanga 680001, Colombia
| | - Alvaro J. Idrovo
- Public Health Department, School of Medicine, Universidad Industrial de Santander, Bucaramanga 680001, Colombia
| | - Lyda Espitia-Pérez
- Grupo de Investigación Biomédicas y Biología Molecular, Universidad del Sinú E.B.Z., Montería 230001, Colombia
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Guo X, Li J, Xue J, Fenech M, Wang X. Loss of Y chromosome: An emerging next-generation biomarker for disease prediction and early detection? MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2021; 788:108389. [PMID: 34893154 DOI: 10.1016/j.mrrev.2021.108389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 07/01/2021] [Accepted: 07/01/2021] [Indexed: 12/25/2022]
Abstract
As human life expectancy increases substantially and aging is the primary risk factor for most chronic diseases, there is an urgent need for advancing the development of post-genomic era biomarkers that can be used for disease prediction and early detection (DPED). Mosaic loss of Y chromosome (LOY) is the state of nullisomy Y in sub-groups of somatic cells acquired from different post-zygotic development stages and onwards throughout the lifespan. Multiple large-cohort based epidemiology studies have found that LOY in blood cells is a significant risk factor for future mortality and various diseases in males. Many features intrinsic to LOY analysis may be leveraged to enhance its use as a non-invasive, sensitive, reliable, high throughput-biomarker for DPED. Here, we review the emerging literatures in LOY studies and highlight ten strengths for using LOY as a novel biomarker for genomics-driven DPED diagnostics. Meanwhile, the current limitations in this area are also discussed. We conclude by identifying some important knowledge gaps regarding the consequences of malsegregation of the Y chromosome and propose further steps that are required before clinical implementation of LOY. Taken together, we think that LOY has substantial potential as a biomarker for DPED, despite some hurdles that still need to be addressed before its integration into healthcare becomes acceptable.
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Affiliation(s)
- Xihan Guo
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan, 650500, China; Yunnan Environmental Mutagen Society, Kunming, Yunnan, 650500, China.
| | - Jianfei Li
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan, 650500, China
| | - Jinglun Xue
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai, 200433, China
| | - Michael Fenech
- Genome Health Foundation, North Brighton, SA, 5048, Australia; University of South Australia, School of Pharmacy and Medical Sciences, Adelaide, SA, 5000, Australia; Centre of Healthy Ageing and Wellness, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
| | - Xu Wang
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan, 650500, China; Yunnan Environmental Mutagen Society, Kunming, Yunnan, 650500, China.
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Jaunay EL, Dhillon VS, Semple SJ, Simpson BS, Ghetia M, Deo P, Fenech M. Genotoxicity of advanced glycation end products in vitro is influenced by their preparation temperature, purification, and cell exposure time. Mutagenesis 2021; 36:445-455. [PMID: 34612487 DOI: 10.1093/mutage/geab037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 10/01/2021] [Indexed: 11/12/2022] Open
Abstract
Advanced glycation end products (AGEs) are formed via non-enzymatic reactions between amino groups of proteins and the carbonyl groups of reducing sugars. Previous studies have shown that highly glycated albumin prepared using a glucose-bovine serum albumin (Glu-BSA) model system incubated at 60°C for 6 weeks induces genotoxicity in WIL2-NS cells at 9 days of exposure measured by the cytokinesis-block micronucleus cytome (CBMNcyt) assay. However, this AGE model system is not physiologically relevant as normal body temperature is 37°C and the degree of glycation may exceed the extent of albumin modification in vivo. We hypothesised that the incubation temperature and purification method used in these studies may cause changes to the chemical profile of the glycated albumin and may influence the extent of genotoxicity observed at 3, 6 and 9 days of exposure. We prepared AGEs generated using Glu-BSA model systems incubated at 60°C or 37°C purified using trichloroacetic acid (TCA) precipitation or ultrafiltration (UF) and compared their chemical profile (glycation, oxidation, and aggregation) and genotoxicity in WIL2-NS cells using the CBMNcyt assay after 3, 6, and 9 days of exposure. The number of micronuclei (MNi) was significantly higher for cells treated with Glu-BSA incubated at 60°C and purified via TCA (12 ± 1 MNi/1000 binucleated cells) compared to Glu-BSA incubated at 37°C and purified using UF (6 ± 1 MNi/1000 binucleated cells) after 9 days (p < 0.0001). The increase in genotoxicity observed could be explained by a higher level of protein glycation, oxidation, and aggregation of the Glu-BSA model system incubated at 60°C relative to 37°C. This study highlighted that the incubation temperature, purification method and cell exposure time are important variables to consider when generating AGEs in vitro and will enable future studies to better reflect in vivo situations of albumin glycation.
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Affiliation(s)
- Emma L Jaunay
- University of South Australia, Clinical and Health Sciences, Health and Biomedical Innovation, GPO Box 2471, Adelaide SA, 5001, Australia.,University of South Australia, Clinical and Health Sciences, Quality Use of Medicines and Pharmacy Research Centre, GPO Box 2471, Adelaide SA, 5001, Australia
| | - Varinderpal S Dhillon
- University of South Australia, Clinical and Health Sciences, Health and Biomedical Innovation, GPO Box 2471, Adelaide SA, 5001, Australia
| | - Susan J Semple
- University of South Australia, Clinical and Health Sciences, Quality Use of Medicines and Pharmacy Research Centre, GPO Box 2471, Adelaide SA, 5001, Australia
| | - Bradley S Simpson
- University of South Australia, Clinical and Health Sciences, Health and Biomedical Innovation, GPO Box 2471, Adelaide SA, 5001, Australia
| | - Maulik Ghetia
- University of South Australia, Clinical and Health Sciences, Health and Biomedical Innovation, GPO Box 2471, Adelaide SA, 5001, Australia
| | - Permal Deo
- University of South Australia, Clinical and Health Sciences, Health and Biomedical Innovation, GPO Box 2471, Adelaide SA, 5001, Australia
| | - Michael Fenech
- University of South Australia, Clinical and Health Sciences, Health and Biomedical Innovation, GPO Box 2471, Adelaide SA, 5001, Australia.,Faculty of Health Sciences, University Kebangsaan Malaysia, Malaysia
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Deo P, Dhillon VS, Lim WM, Jaunay EL, Donnellan L, Peake B, McCullough C, Fenech M. Advanced glycation end-products accelerate telomere attrition and increase pro-inflammatory mediators in human WIL2-NS cells. Mutagenesis 2021; 35:291-297. [PMID: 32319517 DOI: 10.1093/mutage/geaa012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 04/07/2020] [Indexed: 12/11/2022] Open
Abstract
This study investigated the effect of dietary sugars and advanced glycation end-products (AGE) on telomere dynamics in WIL2-NS cells. Dietary sugars [glucose (Glu) and fructose (Fru); 0.1 M each] were incubated with bovine serum albumin (BSA) (10 mg/ml) at 60 ± 1°C for 6 weeks to generate AGE-BSA. Liquid chromatography-mass spectrometry (LC-MS/MS) analysis showed total AGE levels as 87.74 ± 4.46 nmol/mg and 84.94 ± 4.28 nmol/mg respectively in Glu-BSA and Fru-BSA model. Cell treatment studies using WIL2-NS cells were based on either glucose, fructose (each 2.5-40 mM) or AGE-BSA (200-600 µg/ml) in a dose-dependent manner for 9 days. Telomere length (TL) was measured using qPCR. Nitric oxide (NO) production and tumour necrosis factor-α (TNF-α) levels were measured in WIL2-NS culture medium. An increasing trend for TNF-α and NO production was observed with higher concentration of glucose (R2 = 0.358; P = 0.019; R2 = 0.307; P = 0.027) and fructose (R2 = 0.669; P = 0.001; R2 = 0.339; P = 0.006). A decreasing trend for TL (R2 = 0.828; P = 0.000), and an increasing trend for NO production (R2 = 0.352; P = 0.031) were observed with increasing Glu-BSA concentrations. Fru-BSA treatment did not show significant trend on TL (R2 = 0.135; P = 0.352) with increasing concentration, however, a significant reduction was observed at 600 µg/ml (P < 0.01) when compared to BSA treatment. No trends for TNF-α levels and a decreasing trend on NO production (R2 = 0.5201; P = 0.019) was observed with increasing Fru-BSA treatment. In conclusion, this study demonstrates a potential relationship between dietary sugars, AGEs and telomere attrition. AGEs may also exert telomere shortening through the production of pro-inflammatory metabolites, which ultimately increase the risk of diabetes complications and age-related disease throughout lifespan.
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Affiliation(s)
- Permal Deo
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Health and Biomedical Innovation, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Varinderpal S Dhillon
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Health and Biomedical Innovation, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Wai Mun Lim
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Emma L Jaunay
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Health and Biomedical Innovation, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Leigh Donnellan
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Health and Biomedical Innovation, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Brock Peake
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Health and Biomedical Innovation, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Caitlin McCullough
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Michael Fenech
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Health and Biomedical Innovation, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Genome Health Foundation, North Brighton, Australia
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5
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Deo P, McCullough CL, Almond T, Jaunay EL, Donnellan L, Dhillon VS, Fenech M. Dietary sugars and related endogenous advanced glycation end-products increase chromosomal DNA damage in WIL2-NS cells, measured using cytokinesis-block micronucleus cytome assay. Mutagenesis 2020; 35:169-177. [PMID: 31971590 DOI: 10.1093/mutage/geaa002] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 01/07/2020] [Indexed: 01/11/2023] Open
Abstract
This study investigated the effect of glucose and fructose, and advanced glycation end-products (AGEs) on genome damage in WIL2-NS cells, measured using the cytokinesis-block micronucleus cytome (CBMN-Cyt) assay. The effect of AGEs was investigated using the bovine serum albumin (AGE-BSA) model system induced either with glucose (Glu-BSA) or with fructose (Fru-BSA). Liquid chromatography-mass spectrometry (LC-MS/MS) analysis showed higher Nε-carboxymethyllysine (CML; 26.76 ± 1.09 nmol/mg BSA) levels in the Glu-BSA model. Nε-Carboxyethyllysine (CEL; 7.87 ± 0.19 nmol/mg BSA) and methylglyoxal-derived hydroimidazolone-1 (MG-H1; 69.77 ± 3.74 nmol/mg BSA) levels were higher in the Fru-BSA model. Genotoxic effects were measured using CBMN-Cyt assay biomarkers [binucleated(BN) cells with micronuclei (MNi), BN with nucleoplasmic bridges (NPBs) and BN with nuclear buds (NBuds)] following 9 days of treatment with either glucose, fructose, Glu-BSA or Fru-BSA. Fructose treatment exerted a significant genotoxic dose-response effect including increases of BN with MNi (R2 = 0.7704; P = 0.0031), BN with NPBs (R2 = 0.9311; P < 0.0001) and BN with NBuds (R2 = 0.7118; P = 0.0091) on cells, whereas the DNA damaging effects of glucose were less evident. High concentrations of AGEs (400-600 µg/ml) induced DNA damage; however, there was no effect on cytotoxicity indices (necrosis and apoptosis). In conclusion, this study demonstrates a potential link between physiologically high concentrations of reducing sugars or AGEs with increased chromosomal damage which is an important emerging aspect of the pathology that may be induced by diabetes. Ultimately, loss of genome integrity could accelerate the rate of ageing and increase the risk of age-related diseases over the long term. These findings indicate the need for further research on the effects of glycation on chromosomal instability and to establish whether this effect is replicated in humans in vivo.
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Affiliation(s)
- Permal Deo
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Caitlin L McCullough
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | | | - Emma L Jaunay
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Leigh Donnellan
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Varinderpal S Dhillon
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Michael Fenech
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.,Genome Health Foundation, North Brighton, Australia
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6
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Yang P, Wang S, Liu D, Zhao H, Liu Q, Li G. Potential biological damage of human peripheral blood lymphocytes induced by computed tomography examination of the oromaxillofacial region. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:708-716. [PMID: 32591332 DOI: 10.1016/j.oooo.2020.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVES The aim of this study was to examine whether oromaxillofacial computed tomography (CT) examination causes biologic damage in lymphocytes and whether the biologic damage is related to radiation dose, patient age, or gender. STUDY DESIGN Peripheral blood was taken from 51 individuals and divided into control, in vivo, and in vitro irradiation groups. Biologic damage was assessed by comparing rates of chromosomal aberrations (CAs), including dicentric chromosomes (dics), centric rings, and acentric fragments; and nuclear aberrations, including micronuclei (MN), nuclear buds (NBUDs), and nucleoplasmic bridges (NPBs) in the peripheral blood before and after CT examination. Absorbed and effective doses were calculated with the software VirtualDose, and the blood dose was estimated accordingly. RESULTS The rates of acentric fragments, MN, NBUDs, and NPBs in the in vivo (P ≤ .008) and in vitro (P ≤ .003) irradiation groups were significantly higher than those in the control groups. The acentric fragment rate (P = .013) and MN rate (P = .002) were higher in the in vitro group than in the in vivo group. There was no correlation between change rates of CAs and nuclear aberrations with radiation dose. Positive correlations of MN rates with age were found in all groups (ρ ≥ 0.590). CONCLUSIONS Certain doses of radiation in oromaxillofacial CT examination may induce CAs and nuclear aberrations in lymphocytes.
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Affiliation(s)
- Pan Yang
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Shuo Wang
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Denggao Liu
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Hua Zhao
- China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qingjie Liu
- China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Gang Li
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China.
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7
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Fu X, Zhong Z, Hu F, Zhang Y, Li C, Yan P, Feng L, Shen J, Huang B. The protective effects of selenium-enriched Spirulina platensis on chronic alcohol-induced liver injury in mice. Food Funct 2018; 9:3155-3165. [PMID: 29862408 DOI: 10.1039/c8fo00477c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The aim of this study was to investigate the protective effect and mechanism of selenium-enriched Spirulina platensis (S. platensis) on chronic alcohol-induced liver injury. Selenium incubation raises the nutrition quality of S. platensis by absorption enhancement of functional elements. Our results demonstrated that the effective dose of selenium-enriched S. platensis on HL7702 cells treated with alcohol was 200 μg ml-1, containing 20% selenium. Selenium-enriched S. platensis could raise the cell survival rate by decreasing the expression of p53, Caspase3, LC3, and Caspase1 and by increasing the expression of p70s6k. In vivo experiments, where mice were pretreated with selenium-enriched S. platensis, exhibited obvious inhibition of the liver function index and this pretreatment enhanced the activity of GSH-Px and SOD in alcohol induced mice. In summary, our results indicate that the protective mechanism of selenium-enriched S. platensis on chronic alcoholic liver injury is associated with the activity enhancement of antioxidant enzymes and immunity, the inhibition of DNA damage and apoptosis, accompanied with autophagy and pyroptosis.
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Affiliation(s)
- Xiang Fu
- School of life Science, Anhui University, Hefei, 230601 China.
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8
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Gm Š, N J, B R, A D, M V. Association Between Inherited Thrombophilia in Pregnancy and Micronucleus Frequency in Peripheral Blood Lymphocytes. Balkan J Med Genet 2017; 20:11-18. [PMID: 29876228 PMCID: PMC5972498 DOI: 10.1515/bjmg-2017-0024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The aim of this study was to determine possible predictors of an increased frequency of micronucleus (MN) and the impact of thrombophilia on the chromosomal instability in peripheral blood lymphocytes (PBL) of pregnant women in their first trimester. This study was designed as a case-control study on 74 pregnant women. It was performed in the gestational age of 11 to 14 weeks, when blood samples were collected and incubated for 72 hours. The individual MN frequency in PBL was measured by cytokinesis-block micronucleus (CBMN) assay. Women were grouped in control group [≤4 MN/1000 binucleated (BN) cells] and case group (>4 MN/1000 BN cells). Potential mutagenic effects of exogenous/endogenous factors in pregnant women were analyzed. By analyzing the given results, it can be concluded that pregnant women with thrombophilia have 26.69-times more chance of having a frequency of >4 MN/1000 BN than pregnant women with no thrombophilia. Our research was primarily aimed at showing that the presence of thrombophilia was a statistically important predictor of an increased MN frequency in pregnant women and it can predict about one-third of the total variance in MN frequency in the studied population.
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Affiliation(s)
- Šošić Gm
- Department of Cytogenetic Diagnosis, Obstetrics and Gynecology Clinic, Clinical Center "Kragujevac," Kragujevac, Serbia
| | - Jović N
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.,Department of Pathology of Pregnancy, Obstetrics and Gynecology Clinic, Clinical Center "Kragujevac," Kragujevac, Serbia
| | - Rakić B
- Department of Medical Survey, Institute of Occupational Health "Dr Dragomir Karajović," Belgrade, Serbia
| | - Dimitrijević A
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.,Department of Fertility Control, Obstetrics and Gynecology Clinic, Clinical Center "Kragujevac," Kragujevac, Serbia
| | - Varjačić M
- Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.,Department of Pathology of Pregnancy, Obstetrics and Gynecology Clinic, Clinical Center "Kragujevac," Kragujevac, Serbia
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Chuerduangphui J, Pientong C, Patarapadungkit N, Chotiyano A, Vatanasapt P, Kongyingyoes B, Promthet S, Swangphon P, Bumrungthai S, Pimson C, Ekalaksananan T. Amplification of EGFR and cyclin D1 genes associated with human papillomavirus infection in oral squamous cell carcinoma. Med Oncol 2017; 34:148. [DOI: 10.1007/s12032-017-1010-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 07/20/2017] [Indexed: 12/28/2022]
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10
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Meenakshi C, Sivasubramanian K, Venkatraman B. Nucleoplasmic bridges as a biomarker of DNA damage exposed to radon. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2016; 814:22-28. [PMID: 28137364 DOI: 10.1016/j.mrgentox.2016.12.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 12/11/2016] [Accepted: 12/21/2016] [Indexed: 12/22/2022]
Abstract
Radon is a naturally occurring radionuclide in the environment, during decay it emits high linear energy transfer (LET) alpha particles. When radon exposure is accompanied by smoking it has been reported that lung cancer risk is higher. Blood samples were collected after prior consent, 25 smokers and 25 non smokers (only males) exposed in vitro to radon gas with doses ranging between 0.3-12.6mGy Ionizing radiation is a strong clastogenic agent and a potent inducer of MN. Cytokinesis-Blocked Micro Nucleus (CBMN) assay has proven to be a reliable, thoroughly validated and standardised technique in the field of radiation biology. In view of this, an invitro study has been undertaken using CBMN assay to suggest Nucleoplasmic bridges (NPBs) as a potential bio-dosimeter and to investigate the existence of a possible influence of smoking on genetic damage induced by ionizing radiation. The mean percentages frequencies of micronuclei, nucleoplasmic bridges and nuclear buds among the exposed smoker group were 4.82±0.271, 0.6±0.04 and 0.12±0.02 respectively and these values for exposed non-smoker group were 2.78±0.285, 0.4±0.04 and 0.06±0.01 respectively. Spearman rank correlation for the frequency of nucleoplasmic bridge with respect to dose was considered to be significant (P<0.05) in non-smokers. This study is first of its kind to investigate NPB as a biomarker of early DNA damage induced by radon.
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Affiliation(s)
- C Meenakshi
- Radiological Safety Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, 603102, Tamilnadu, India.
| | - K Sivasubramanian
- Radiological Safety Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, 603102, Tamilnadu, India
| | - B Venkatraman
- Radiological Safety Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, 603102, Tamilnadu, India
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Fenech M, Knasmueller S, Bolognesi C, Bonassi S, Holland N, Migliore L, Palitti F, Natarajan AT, Kirsch-Volders M. Molecular mechanisms by which in vivo exposure to exogenous chemical genotoxic agents can lead to micronucleus formation in lymphocytes in vivo and ex vivo in humans. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2016; 770:12-25. [DOI: 10.1016/j.mrrev.2016.04.008] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/18/2016] [Indexed: 12/24/2022]
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12
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Carvalho ICS, Dutra TP, De Andrade DP, Balducci I, Pacheco-Soares C, Rocha RFD. High doses of alcohol during pregnancy cause DNA damages in osteoblasts of newborns rats. ACTA ACUST UNITED AC 2015; 106:122-32. [DOI: 10.1002/bdra.23468] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Isabel Chaves Silva Carvalho
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Biosciences and Oral Diagnosis; Sao Jose dos Campos; Sao Paulo Brazil
| | - Tamires Pereira Dutra
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Biosciences and Oral Diagnosis; Sao Jose dos Campos; Sao Paulo Brazil
| | - Dennia Perez De Andrade
- Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments; Sao Jose dos Campos; Sao Paulo Brazil
| | - Ivan Balducci
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Social Science and Pediatric Dentristy; Sao Jose dos Campos; Sao Paulo Brazil
| | - Cristina Pacheco-Soares
- Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments; Sao Jose dos Campos; Sao Paulo Brazil
| | - Rosilene Fernandes da Rocha
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Biosciences and Oral Diagnosis; Sao Jose dos Campos; Sao Paulo Brazil
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13
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Chua A, Thomas P, Clifton P, Fenech M. Chromosomal DNA damage in APOE ɛ4 carriers and noncarriers does not appear to be different. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2015; 56:694-708. [PMID: 25820038 DOI: 10.1002/em.21949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 02/26/2015] [Accepted: 03/03/2015] [Indexed: 06/04/2023]
Abstract
DNA damage may play a key role in promoting disease-onset and accelerated disease progression in Alzheimer's disease (AD) by increasing the rates of neuronal cell death. The ɛ4 allele of the APOE gene is the best characterised genetic risk factor for AD, however, it is unknown if APOE ɛ4 carriers exhibit increased levels of DNA damage which may contribute to increased AD risk. 175 healthy participants (aged 34-67 years old) from South Australia were recruited into the study and provided a single blood sample for the isolation of peripheral blood lymphocytes, APOE genotyping and lymphocyte chromosomal DNA damage analysis using the Cytokinesis-Block micronucleus cytome (CBMN-Cyt) assay with the micronucleus index being the primary outcome measure. When compared to non-APOE ɛ4 carriers, APOE ɛ4 carriers did not exhibit altered rates of i) cell division, represented by the nuclear division index (NDI, P = 0.372), ii) cell death as represented by apoptotic (P = 0.457) and necrotic (P = 0.393) frequencies and iii) chromosomal DNA damage as indicated by the number of micronuclei (MNi, P = 0.795), nucleoplasmic bridges (NPBs, P = 0.221) or nuclear buds (NBUDs, P = 0.293) scored in binucleated cells. In conclusion, although we and others have previously shown that rates of chromosomal DNA damage measured using the CBMN-Cyt assay are elevated in individuals with cognitive impairment, in this South Australian cohort the frequency of genome instability is not substantially influenced by the presence of the APOE ɛ4 allele.
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Affiliation(s)
- Ann Chua
- Department of Physiology, School of Medical Sciences, University of Adelaide, Adelaide, Australia
- Nutrigenomics and Neurodegenerative Disease Prevention, Nutrigenomics Laboratory, CSIRO, Food and Nutrition Flagship, Adelaide, Australia
| | - Philip Thomas
- Nutrigenomics and Neurodegenerative Disease Prevention, Nutrigenomics Laboratory, CSIRO, Food and Nutrition Flagship, Adelaide, Australia
| | - Peter Clifton
- Department of Physiology, School of Medical Sciences, University of Adelaide, Adelaide, Australia
| | - Michael Fenech
- Nutrigenomics and Neurodegenerative Disease Prevention, Nutrigenomics Laboratory, CSIRO, Food and Nutrition Flagship, Adelaide, Australia
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14
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Morita T, Uno Y, Honma M, Kojima H, Hayashi M, Tice RR, Corvi R, Schechtman L. The JaCVAM international validation study on the in vivo comet assay: Selection of test chemicals. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015. [DOI: 10.1016/j.mrgentox.2015.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Nakagawa Y, Toyoizumi T, Sui H, Ohta R, Kumagai F, Usumi K, Saito Y, Yamakage K. In vivo comet assay of acrylonitrile, 9-aminoacridine hydrochloride monohydrate and ethanol in rats. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015. [PMID: 26212299 DOI: 10.1016/j.mrgentox.2015.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
As part of the Japanese Center for the Validation of Alternative Methods (JaCVAM)-initiative international validation study of the in vivo rat alkaline comet assay, we examined the ability of acrylonitrile, 9-aminoacridine hydrochloride monohydrate (9-AA), and ethanol to induce DNA damage in the liver and glandular stomach of male rats. Acrylonitrile is a genotoxic carcinogen, 9-AA is a genotoxic non-carcinogen, and ethanol is a non-genotoxic carcinogen. Positive results were obtained in the liver cells of male rats treated with known genotoxic compounds, acrylonitrile and 9-AA.
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Affiliation(s)
- Yuzuki Nakagawa
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan.
| | | | - Hajime Sui
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan
| | - Ryo Ohta
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan
| | - Fumiaki Kumagai
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan
| | - Kenji Usumi
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan
| | - Yoshiaki Saito
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan
| | - Kohji Yamakage
- Hatano Research Institute, Food and Drug Safety Center, Hadano, Japan
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16
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Susceptibility Based Upon Chemical Interaction with Disease Processes: Potential Implications for Risk Assessment. Curr Environ Health Rep 2014. [DOI: 10.1007/s40572-014-0030-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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17
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Cornélio DA, Tavares JCM, Pimentel TVCDA, Cavalcanti GB, Batistuzzo de Medeiros SR. Cytokinesis-block micronucleus assay adapted for analyzing genomic instability of human mesenchymal stem cells. Stem Cells Dev 2014; 23:823-38. [PMID: 24328548 DOI: 10.1089/scd.2013.0383] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Human mesenchymal stem cells (hMSCs) are multipotent cells used in cell therapy research. One of the problems involving hMSCs is the possibility of genetic instability during in vitro expansion required to obtain a suitable number of cells for clinical applications. The cytokinesis-block micronucleus (CBMN) assay measures genetic instability by analyzing the presence of micronucleus (MN), nucleoplasmic bridges (NPBs), and nuclear buds (NBUDs) in binucleated cells. The present study describes modifications in the CBMN assay methodology to analyze genetic instability in hMSCs isolated from the umbilical vein and in vitro expanded. The best protocol to achieve binucleated hMSCs with preserved cytoplasm was as follows: cytochalasin B concentration (4.0 μg/mL), use of hypotonic treatment (3 min), and the fixative solution (9 methanol:1 acetic acid). These adaptations were reproduced in three hMSC primary cell cultures and also in XP4PA and A549 cell lines. The frequency of hMSCs treated with mitomycin-C presenting MN was lower than that with other nuclear alterations, indicating that the hMSCs contain mechanisms to avoid a high level of chromosomal breaks. However, a high frequency of cells with NPBs was detected and spontaneous anaphase bridges under normal hMSC in vitro culture were observed. Considering that anaphase bridges are characteristic alterations in tumor cells, the CBMN assay is indicated as an important tool associated with other genetic analyses in order to ensure the safe clinical use of hMSCs in cell therapy.
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Affiliation(s)
- Déborah Afonso Cornélio
- 1 Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte , Natal, Brazil
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18
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Clave S, Joya X, Salat-Batlle J, Garcia-Algar O, Vall O. Ethanol cytotoxic effect on trophoblast cells. Toxicol Lett 2013; 225:216-21. [PMID: 24374569 DOI: 10.1016/j.toxlet.2013.12.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 12/18/2013] [Accepted: 12/19/2013] [Indexed: 01/13/2023]
Abstract
Prenatal ethanol exposure may cause both, altered fetal neurodevelopment and impaired placental function. These disturbances can lead to growth retardation, which is one of the most prevalent features in Fetal Alcohol Syndrome (FAS). It is not known whether there is a specific pattern of cytotoxicity caused by ethanol that can be extrapolated to other cell types. The aim of this study was to determine the cytotoxic effects caused by sustained exposure of trophoblast cells to ethanol. The cytotoxic effect of sustained exposure to standard doses of ethanol on an in vitro human trophoblast cell line, JEG3, was examined. Viable cell count by exclusion method, total protein concentration, lactate dehydrogenase (LDH) activity and activation of apoptotic markers (P-H2AX, caspase-3 and PARP-1) were determined. Sustained exposure to ethanol decreased viable cell count and total protein concentration. LDH activity did not increased in exposed cells but apoptotic markers were detected. In addition, there was a dose-dependent relationship between ethanol concentration and apoptotic pathways activation. Sustained ethanol exposure causes cellular cytotoxicity by apoptotic pathways induction as a result of DNA damage. This apoptotic induction may partially explain the altered function of placental cells and the damage previously detected in other tissues.
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Affiliation(s)
- S Clave
- Unitat de Recerca Infància i Entorn (URIE), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), PRBB, C/ Dr. Aiguader 88, 08003 Barcelona, Spain; Red de Salud Materno Infantil y del Desarrollo (SAMID), Programa RETIC, Instituto Carlos III, C/ Sinesio Delgado 4, 28029 Madrid, Spain
| | - X Joya
- Unitat de Recerca Infància i Entorn (URIE), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), PRBB, C/ Dr. Aiguader 88, 08003 Barcelona, Spain; Red de Salud Materno Infantil y del Desarrollo (SAMID), Programa RETIC, Instituto Carlos III, C/ Sinesio Delgado 4, 28029 Madrid, Spain
| | - J Salat-Batlle
- Unitat de Recerca Infància i Entorn (URIE), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), PRBB, C/ Dr. Aiguader 88, 08003 Barcelona, Spain; Red de Salud Materno Infantil y del Desarrollo (SAMID), Programa RETIC, Instituto Carlos III, C/ Sinesio Delgado 4, 28029 Madrid, Spain
| | - O Garcia-Algar
- Unitat de Recerca Infància i Entorn (URIE), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), PRBB, C/ Dr. Aiguader 88, 08003 Barcelona, Spain; Red de Salud Materno Infantil y del Desarrollo (SAMID), Programa RETIC, Instituto Carlos III, C/ Sinesio Delgado 4, 28029 Madrid, Spain; Departament de Pediatria, Obstetricia i Ginecologia, i Medicina Preventiva, Universitat Autònoma de Barcelona (UAB), Campus M, 08193 Bellaterra, Spain.
| | - O Vall
- Unitat de Recerca Infància i Entorn (URIE), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), PRBB, C/ Dr. Aiguader 88, 08003 Barcelona, Spain; Red de Salud Materno Infantil y del Desarrollo (SAMID), Programa RETIC, Instituto Carlos III, C/ Sinesio Delgado 4, 28029 Madrid, Spain; Departament de Pediatria, Obstetricia i Ginecologia, i Medicina Preventiva, Universitat Autònoma de Barcelona (UAB), Campus M, 08193 Bellaterra, Spain
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Zhao H, Lu X, Li S, Chen DQ, Liu QJ. Characteristics of nucleoplasmic bridges induced by 60Co γ-rays in human peripheral blood lymphocytes. Mutagenesis 2013; 29:49-51. [DOI: 10.1093/mutage/get062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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20
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Fenech M, Kirsch-Volders M. RE: Insensitivity of the in vitro cytokinesis-block micronucleus assay with human lymphocytes for the detection of DNA damage present at the start of the cell culture (Mutagenesis, 27, 743–747, 2012). Mutagenesis 2013; 28:367-9. [DOI: 10.1093/mutage/ges081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Fowler AK, Hewetson A, Agrawal RG, Dagda M, Dagda R, Moaddel R, Balbo S, Sanghvi M, Chen Y, Hogue RJ, Bergeson SE, Henderson GI, Kruman II. Alcohol-induced one-carbon metabolism impairment promotes dysfunction of DNA base excision repair in adult brain. J Biol Chem 2012; 287:43533-42. [PMID: 23118224 DOI: 10.1074/jbc.m112.401497] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The brain is one of the major targets of chronic alcohol abuse. Yet the fundamental mechanisms underlying alcohol-mediated brain damage remain unclear. The products of alcohol metabolism cause DNA damage, which in conditions of DNA repair dysfunction leads to genomic instability and neural death. We propose that one-carbon metabolism (OCM) impairment associated with long term chronic ethanol intake is a key factor in ethanol-induced neurotoxicity, because OCM provides cells with DNA precursors for DNA repair and methyl groups for DNA methylation, both critical for genomic stability. Using histological (immunohistochemistry and stereological counting) and biochemical assays, we show that 3-week chronic exposure of adult mice to 5% ethanol (Lieber-Decarli diet) results in increased DNA damage, reduced DNA repair, and neuronal death in the brain. These were concomitant with compromised OCM, as evidenced by elevated homocysteine, a marker of OCM dysfunction. We conclude that OCM dysfunction plays a causal role in alcohol-induced genomic instability in the brain because OCM status determines the alcohol effect on DNA damage/repair and genomic stability. Short ethanol exposure, which did not disturb OCM, also did not affect the response to DNA damage, whereas additional OCM disturbance induced by deficiency in a key OCM enzyme, methylenetetrahydrofolate reductase (MTHFR) in Mthfr(+/-) mice, exaggerated the ethanol effect on DNA repair. Thus, the impact of long term ethanol exposure on DNA repair and genomic stability in the brain results from OCM dysfunction, and MTHFR mutations such as Mthfr 677C→T, common in human population, may exaggerate the adverse effects of ethanol on the brain.
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Affiliation(s)
- Anna-Kate Fowler
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, USA
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22
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Kumar A, Yadav A, Giri SK, Dev K, Gautam SK, Gupta R, Aggarwal N. Influence of GSTM1 and GSTT1 genotypes and confounding factors on the frequency of sister chromatid exchange and micronucleus among road construction workers. CHEMOSPHERE 2011; 84:564-570. [PMID: 21543101 DOI: 10.1016/j.chemosphere.2011.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2010] [Revised: 03/12/2011] [Accepted: 04/04/2011] [Indexed: 05/30/2023]
Abstract
In the present study, we have investigated the influence of polymorphism of GSTM1 and GSTT1 genes and confounding factors such as age, sex, exposure duration and consumption habits on cytogenetic biomarkers. Frequency of sister chromatid exchanges (SCEs), high frequency cell (HFC) and cytokinesis blocked micronuclei (CBMN) were evaluated in peripheral blood lymphocytes of 115 occupationally exposed road construction workers and 105 unexposed individuals. The distribution of null and positive genotypes of glutathione-S transferase gene was evaluated by multiplex PCR among control and exposed subjects. An increased frequency of CBMN (7.03±2.08); SCE (6.95±1.76) and HFC (6.28±1.69) were found in exposed subjects when compared to referent (CBMN - 3.35±1.10; SCE - 4.13±1.30 and HFC - 3.98±1.56). These results were found statistically significant at p<0.05. When the effect of confounding factors on the frequency of studied biomarkers was evaluated, a strong positive interaction was found. The individuals having GSTM1 and GSTT1 null genotypes had higher frequency of CBMN, SCE and HFC. The association between GSTM1 and GSTT1 genotypes and studied biomarkers was found statistically significant at p<0.05. Our findings suggest that individuals having null type of GST are more susceptible to cytogenetic damage by occupational exposure regardless of confounding factors. There is a significant effect of polymorphism of these genes on cytogenetic biomarkers which are considered as early effects of genotoxic carcinogens.
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Affiliation(s)
- Anil Kumar
- Department of Biotechnology, Kurukshetra University, Kurukshetra, Haryana, India
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