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Liu S, Zhang L, Luo N, Wang M, Tang C, Jing J, Chen H, Hu Q, Tan L, Ma X, Zou Y. Metal mixture exposure and the risk for immunoglobulin A nephropathy: Evidence from weighted quantile sum regression. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:87783-87792. [PMID: 37434053 DOI: 10.1007/s11356-023-28706-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 07/05/2023] [Indexed: 07/13/2023]
Abstract
Immunoglobulin A nephropathy (IgAN) is the most common type of glomerulonephritis in adults worldwide. Environmental metal exposure has been reported to be involved in the pathogenic mechanisms of kidney diseases, yet no further epidemiological study has been conducted to assess the effects of metal mixture exposure on IgAN risk. In this study, we conducted a matched case‒control design with three controls for each patient to investigate the association between metal mixture exposure and IgAN risk. A total of 160 IgAN patients and 480 healthy controls were matched for age and sex. Plasma levels of arsenic, lead, chromium, manganese, cobalt, copper, zinc, and vanadium were measured using inductively coupled plasma mass spectrometry. We used a conditional logistic regression model to assess the association between individual metals and IgAN risk, and a weighted quantile sum (WQS) regression model to analyze the effects of metal mixtures on IgAN risk. Restricted cubic splines were used to evaluate overall associations between plasma metal concentrations and estimated glomerular filtration rate (eGFR) levels. We observed that except for Cu, all the metals analyzed were nonlinearly associated with decreased eGFR, and higher concentrations of arsenic and lead were associated with elevated IgAN risk in both single-metal [3.29 (1.94, 5.57), 6.10 (3.39, 11.0), respectively] and multiple-metal [3.04 (1.66, 5.57), 4.70 (2.47, 8.97), respectively] models. Elevated manganese [1.76 (1.09, 2.83)] levels were associated with increased IgAN risk in the single-metal model. Copper was inversely related to IgAN risk in both single-metal [0.392 (0.238, 0.645)] and multiple-metal [0.357 (0.200, 0.638)] models. The WQS indices in both positive [2.04 (1.68, 2.47)] and negative [0.717 (0.603, 0.852)] directions were associated with IgAN risk. Lead, arsenic, and vanadium contributed significant weights (0.594, 0.195, and 0.191, respectively) in the positive direction; copper, cobalt, and chromium carried significant weights (0.538, 0.253, and 0.209, respectively). In conclusion, metal exposure was related to IgAN risk. Lead, arsenic, and copper were all significantly weighted factors of IgAN development, which may require further investigation.
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Affiliation(s)
- Shaohui Liu
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Li'e Zhang
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
- Department of Occupational and Environmental Health, School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Na Luo
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
- Department of Clinical Nutriology, The First Affiliated Hospital of Shaoyang University, Shaoyang, 422000, China
| | - Mingjun Wang
- Department of Nephrology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Chuanqiao Tang
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Jiajun Jing
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Hao Chen
- Department of Occupational and Environmental Health, School of Public Health, Guangxi Medical University, Nanning, 530021, China
| | - Qiuhua Hu
- Department of Nephrology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Lina Tan
- Department of Nephrology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Xiaoli Ma
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China
| | - Yunfeng Zou
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China.
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, 530021, China.
- Guangxi Key Laboratory of Environment and Health Research, Guangxi Medical University, Nanning, 530021, China.
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Effects of Prenatal Exposure to Arsenic on T Cell Development in Children. CURRENT OPINION IN TOXICOLOGY 2023. [DOI: 10.1016/j.cotox.2023.100389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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3
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Amoako-Sakyi D, Obiri-Yeboah D, Ofosu A, Kusi KA, Osei K, Adade R, Aniakwaa-Bonsu E, Quansah R, Arko-Mensah J, Amoah BY, Kwakye-Nuako G, Frimpong EY, Combasseré-Cherif M, Mohammed H, Maiga B, Fobil J, Quakyi I, Gyan BA. Preponderance of vaccine-preventable diseases hotspots in northern Ghana: a spatial and space-time clustering analysis from 2010 to 2014. BMC Public Health 2022; 22:1899. [PMID: 36224589 PMCID: PMC9555261 DOI: 10.1186/s12889-022-14307-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 09/29/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Vaccine-preventable diseases (VPDs) persist globally with a disproportionately high burden in Low and Middle-Income Countries (LMICs). Although this might be partly due to the failure to sustain vaccination coverage above 90% in some WHO regions, a more nuanced understanding of VPD transmission beyond vaccination coverage may unveil other important factors in VPD transmission and control. This study identified VPDs hotspots and explored their relationships with ecology, urbanicity and land-use variations (Artisanal and Small-scale Gold Mining (ASGM) activities) in Ghana. METHODS District-level disease count data from 2010 to 2014 from the Ghana Health Service (GHS) and population data from the Ghana Population and Housing Census (PHC) were used to determine clustering patterns of six VPDs (Measles, Meningitis, Mumps, Otitis media, Pneumonia and Tetanus). Spatial and space-time cluster analyses were implemented in SaTScan using the discrete Poisson model. P-values were estimated using a combination of sequential Monte Carlo, standard Monte Carlo, and Gumbel approximations. RESULTS The study found a preponderance for VPD hotspots in the northern parts of Ghana and northernmost ecological zones (Sudan Savannah and Guinea Savannah). Incidence of meningitis was higher in the Sudan Savannah ecological zone relative to: Tropical Rain Forest (p = 0.001); Semi Deciduous Forest (p < 0.0001); Transitional Zone (p < 0.0001); Coastal Savannah (p < 0.0001) and Guinea Savannah (p = 0.033). Except for mumps, which recorded a higher incidence in urban districts (p = 0.045), incidence of the other five VPDs did not differ across the urban-rural divide. Whereas spatial analysis suggested that some VPD hotspots (tetanus and otitis media) occur more frequently in mining districts in the southern part of the country, a Mann-Whitney U test revealed a higher incidence of meningitis in non-mining districts (p = 0.019). Pneumonia and meningitis recorded the highest (722.8 per 100,000) and least (0.8 per 100,000) incidence rates respectively during the study period. CONCLUSION This study shows a preponderance of VPD hotspots in the northern parts of Ghana and in semi-arid ecoclimates. The relationship between ASGM activities and VPD transmission in Ghana remains blurred and requires further studies with better spatial resolution to clarify.
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Affiliation(s)
- Daniel Amoako-Sakyi
- Department of Microbiology and Immunology, School of Medical Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana.
| | - Dorcas Obiri-Yeboah
- Department of Microbiology and Immunology, School of Medical Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Anthony Ofosu
- Centre for Health Information Management, Ghana Health Services, Accra, Ghana
| | - Kwadwo Asamoah Kusi
- Immunology Department, College of Health Sciences, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Kingsley Osei
- Department of Geography and Regional Planning, Faculty of Social Sciences, College of Humanities in Legal Studies, University of Cape Coast, Cape Coast, Ghana
| | - Richard Adade
- Centre for Coastal Managenment, University of Cape Coast., Cape Coast, Ghana
| | - Ebenezer Aniakwaa-Bonsu
- Department of Microbiology and Immunology, School of Medical Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Reginald Quansah
- Department of Biological, Environmental and Occupational Health, School of Public Health, College of Health Sciences, University of Ghana, Legon, Ghana
| | - John Arko-Mensah
- Department of Biological, Environmental and Occupational Health, School of Public Health, College of Health Sciences, University of Ghana, Legon, Ghana
| | - Brodrick Yeboah Amoah
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Godwin Kwakye-Nuako
- Department of Biomedical Sciences, School of Allied Health Sciences, College of Health and Allied Sciences, University of Cape Coast., Cape Coast, Ghana
| | - Eric Yaw Frimpong
- Office of Population Health and Evaluation, New York State Office of Mental Health, Albany, NY, USA
| | - Mariama Combasseré-Cherif
- Unité de Formation et de Recherche en Sciences et Techniques, Université Nazi, Bobo- Dioulasso, Burkina Faso, Burkina Faso
| | - Hidaya Mohammed
- Department of Microbiology and Immunology, School of Medical Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Boubacar Maiga
- University of Sciences, Techniques and Technology of Bamako (USTT-B), Bamako, Mali
| | - Julius Fobil
- Department of Biological, Environmental and Occupational Health, School of Public Health, College of Health Sciences, University of Ghana, Legon, Ghana
| | - Isabella Quakyi
- Department of Biological, Environmental and Occupational Health, School of Public Health, College of Health Sciences, University of Ghana, Legon, Ghana
| | - Ben A Gyan
- Immunology Department, College of Health Sciences, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
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Figueroa-Garduño I, Escamilla-Núñez C, Barraza-Villarreal A, Hernández-Cadena L, Onofre-Pardo EN, Romieu I. Docosahexaenoic Acid Effect on Prenatal Exposure to Arsenic and Atopic Dermatitis in Mexican Preschoolers. Biol Trace Elem Res 2022; 201:3152-3161. [PMID: 36074245 DOI: 10.1007/s12011-022-03411-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 08/31/2022] [Indexed: 11/28/2022]
Abstract
Childhood atopic dermatitis (AD) is a chronic and recurrent health problem that involves multiple factors, particularly immunological and environmental. We evaluated the impact of docosahexaenoic acid (DHA) supplementation on prenatal arsenic exposure on the risk of atopic dermatitis in preschool children as part of the POSGRAD (Prenatal Omega-3 fatty acid Supplements, GRowth, And Development) clinical trial study in the city of Morelos, Mexico. Our study population included 300 healthy mother-child pairs. Of these, 146 were in the placebo group and 154 in the supplement group. Information on family history, health, and other variables was obtained through standardized questionnaires used during follow-up. Prenatal exposure to arsenic concentrations, which appear in maternal urine, was measured by inductively coupled plasma optical emission spectrometry. To assess the effect of prenatal arsenic exposure on AD risk, we ran a generalized estimating equation model for longitudinal data, adjusting for potential confounders, and testing for interaction by omega-3 fatty acid supplementation during pregnancy. The mean and SD (standard deviation) of arsenic concentration during pregnancy was 0.06 mg/L, SD (0.04 mg/L). We found a marginally significant association between prenatal arsenic exposure and AD (OR = 1.12, 95% CI: 0.99, 1.26); however, DHA supplementation during pregnancy modified the effect of arsenic on AD risk (p < 0.05). The results of this study strengthen the evidence that arsenic exposure during pregnancy increases the risk of atopic dermatitis early in life. However, supplementation with omega-e fatty acids during pregnancy could modify this association.
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Affiliation(s)
- Ivan Figueroa-Garduño
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Morelos, Cuernavaca, México
| | - Consuelo Escamilla-Núñez
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Morelos, Cuernavaca, México.
| | - Albino Barraza-Villarreal
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Morelos, Cuernavaca, México
| | - Leticia Hernández-Cadena
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Morelos, Cuernavaca, México
| | - Erika Noelia Onofre-Pardo
- Departamento de Ingeniería en Sistemas Ambientales, Instituto Politécnico Nacional: Escuela Nacional de Ciencias Biológicas, Ciudad de Mexico, México
| | - Isabelle Romieu
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Morelos, Cuernavaca, México
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Kim S, Hollinger H, Radke EG. 'Omics in environmental epidemiological studies of chemical exposures: A systematic evidence map. ENVIRONMENT INTERNATIONAL 2022; 164:107243. [PMID: 35551006 DOI: 10.1016/j.envint.2022.107243] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 03/25/2022] [Accepted: 04/10/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Systematic evidence maps are increasingly used to develop chemical risk assessments. These maps can provide an overview of available studies and relevant study information to be used for various research objectives and applications. Environmental epidemiological studies that examine the impact of chemical exposures on various 'omic profiles in human populations provide relevant mechanistic information and can be used for benchmark dose modeling to derive potential human health reference values. OBJECTIVES To create a systematic evidence map of environmental epidemiological studies examining environmental contaminant exposures with 'omics in order to characterize the extent of available studies for future research needs. METHODS Systematic review methods were used to search and screen the literature and included the use of machine learning methods to facilitate screening studies. The Populations, Exposures, Comparators and Outcomes (PECO) criteria were developed to identify and screen relevant studies. Studies that met the PECO criteria after full-text review were summarized with information such as study population, study design, sample size, exposure measurement, and 'omics analysis. RESULTS Over 10,000 studies were identified from scientific databases. Screening processes were used to identify 84 studies considered PECO-relevant after full-text review. Various contaminants (e.g. phthalate, benzene, arsenic, etc.) were investigated in epidemiological studies that used one or more of the four 'omics of interest: epigenomics, transcriptomics, proteomics, and metabolomics . The epidemiological study designs that were used to explore single or integrated 'omic research questions with contaminant exposures were cohort studies, controlled trials, cross-sectional, and case-control studies. An interactive web-based systematic evidence map was created to display more study-related information. CONCLUSIONS This systematic evidence map is a novel tool to visually characterize the available environmental epidemiological studies investigating contaminants and biological effects using 'omics technology and serves as a resource for investigators and allows for a range of applications in chemical research and risk assessment needs.
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Affiliation(s)
- Stephanie Kim
- Superfund and Emergency Management Division, Region 2, U.S. Environmental Protection Agency, NY, USA.
| | - Hillary Hollinger
- Office of Pollution Prevention and Toxics, U.S. Environmental Protection Agency, NC, USA.
| | - Elizabeth G Radke
- Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, D.C, USA.
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Kim S, White SM, Radke EG, Dean JL. Harmonization of transcriptomic and methylomic analysis in environmental epidemiology studies for potential application in chemical risk assessment. ENVIRONMENT INTERNATIONAL 2022; 164:107278. [PMID: 35537365 DOI: 10.1016/j.envint.2022.107278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/27/2022] [Accepted: 05/02/2022] [Indexed: 06/14/2023]
Abstract
Recent efforts have posited the utility of transcriptomic-based approaches to understand chemical-related perturbations in the context of human health risk assessment. Epigenetic modification (e.g., DNA methylation) can influence gene expression changes and is known to occur as a molecular response to some chemical exposures. Characterization of these methylation events is critical to understand the molecular consequences of chemical exposures. In this context, a novel workflow was developed to interrogate publicly available epidemiological transcriptomic and methylomic data to identify relevant pathway level changes in response to chemical exposure, using inorganic arsenic as a case study. Gene Set Enrichment Analysis (GSEA) was used to identify causal methylation events that result in concomitant downstream transcriptional deregulation. This analysis demonstrated an unequal distribution of differentially methylated regions across the human genome. After mapping these events to known genes, significant enrichment of a subset of these pathways suggested that arsenic-mediated methylation may be both specific and non-specific. Parallel GSEA performed on matched transcriptomic samples determined that a substantially reduced subset of these pathways are enriched and that not all chemically-induced methylation results in a downstream alteration in gene expression. The resulting pathways were found to be representative of well-established molecular events known to occur in response to arsenic exposure. The harmonization of enriched transcriptional patterns with those identified from the methylomic platform promoted the characterization of plausibly causal molecular signaling events. The workflow described here enables significant gene and methylation-specific pathways to be identified from whole blood samples of individuals exposed to environmentally relevant chemical levels. As future efforts solidify specific causal relationships between these molecular events and relevant apical endpoints, this novel workflow could aid risk assessments by identifying molecular targets serving as biomarkers of hazard, informing mechanistic understanding, and characterizing dose ranges that promote relevant molecular/epigenetic signaling events occuring in response to chemical exposures.
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Affiliation(s)
- Stephanie Kim
- Superfund and Emergency Management Division, Region 2, U.S. Environmental Protection Agency, NY, USA.
| | - Shana M White
- Chemical and Pollutant Assessment Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Cincinnati, USA.
| | - Elizabeth G Radke
- Chemical and Pollutant Assessment Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, D.C., USA.
| | - Jeffry L Dean
- Chemical and Pollutant Assessment Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Cincinnati, USA.
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Freeborn RA, Boss AP, Kaiser LM, Gardner EM, Rockwell CE. Trivalent arsenic impairs the effector response of human CD4+ and CD8+ T cells to influenza A virus ex vivo. Food Chem Toxicol 2022; 165:113122. [DOI: 10.1016/j.fct.2022.113122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/25/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022]
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Martínez-Castillo M, García-Montalvo EA, Arellano-Mendoza MG, Sánchez-Peña LDC, Soria Jasso LE, Izquierdo-Vega JA, Valenzuela OL, Hernández-Zavala A. Arsenic exposure and non-carcinogenic health effects. Hum Exp Toxicol 2021; 40:S826-S850. [PMID: 34610256 DOI: 10.1177/09603271211045955] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Inorganic arsenic (iAs) exposure is a serious health problem that affects more than 140 million individuals worldwide, mainly, through contaminated drinking water. Acute iAs poisoning produces several symptoms such as nausea, vomiting, abdominal pain, and severe diarrhea, whereas prolonged iAs exposure increased the risk of several malignant disorders such as lung, urinary tract, and skin tumors. Another sensitive endpoint less described of chronic iAs exposure are the non-malignant health effects in hepatic, endocrine, renal, neurological, hematological, immune, and cardiovascular systems. The present review outlines epidemiology evidence and possible molecular mechanisms associated with iAs-toxicity in several non-carcinogenic disorders.
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Affiliation(s)
- Macario Martínez-Castillo
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, 27740Instituto Politécnico Nacional, Ciudad de México, México
| | | | - Mónica G Arellano-Mendoza
- Laboratorio de Investigación en Enfermedades Crónico-Degenerativas, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, 27740Instituto Politécnico Nacional, Ciudad de México, México
| | - Luz Del C Sánchez-Peña
- Departamento de Toxicología, 540716Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de Mexico, México
| | - Luis E Soria Jasso
- Centro de Investigación en Biología de la Reproducción, Área Académica de Medicina del Instituto de Ciencias de la Salud, 103794Universidad Autónoma del Estado de Hidalgo, Pachuca, México
| | - Jeannett A Izquierdo-Vega
- Área Académica de Medicina, Instituto de Ciencias de la Salud, 103794Universidad Autónoma del Estado de Hidalgo, Pachuca, México
| | - Olga L Valenzuela
- Facultad de Ciencias Químicas, 428055Universidad Veracruzana, Orizaba, México
| | - Araceli Hernández-Zavala
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, 27740Instituto Politécnico Nacional, Ciudad de México, México
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De Loma J, Gliga AR, Levi M, Ascui F, Gardon J, Tirado N, Broberg K. Arsenic Exposure and Cancer-Related Proteins in Urine of Indigenous Bolivian Women. Front Public Health 2020; 8:605123. [PMID: 33381488 PMCID: PMC7767847 DOI: 10.3389/fpubh.2020.605123] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/26/2020] [Indexed: 12/18/2022] Open
Abstract
Indigenous people living in the Bolivian Andes are exposed through their drinking water to inorganic arsenic, a potent carcinogen. However, the health consequences of arsenic exposure in this region are unknown. The aim of this study was to evaluate associations between arsenic exposure and changes in cancer-related proteins in indigenous women (n = 176) from communities around the Andean Lake Poopó, Bolivia. Arsenic exposure was assessed in whole blood (B-As) and urine (as the sum of arsenic metabolites, U-As) by inductively coupled plasma-mass spectrometry (ICP-MS). Cancer-related proteins (N = 92) were measured in urine using the proximity extension assay. The median B-As concentration was 2.1 (range 0.60-9.1) ng/g, and U-As concentration was 67 (12-399) μg/L. Using linear regression models adjusted for age, urinary osmolality, and urinary leukocytes, we identified associations between B-As and four putative cancer-related proteins: FASLG, SEZ6L, LYPD3, and TFPI2. Increasing B-As concentrations were associated with lower protein expression of SEZ6L, LYPD3, and TFPI2, and with higher expression of FASLG in urine (no association was statistically significant after correcting for multiple comparisons). The associations were similar across groups with different arsenic metabolism efficiency, a susceptibility factor for arsenic toxicity. In conclusion, arsenic exposure in this region was associated with changes in the expression of some cancer-related proteins in urine. Future research is warranted to understand if these proteins could serve as valid biomarkers for arsenic-related toxicity.
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Affiliation(s)
- Jessica De Loma
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anda R Gliga
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Michael Levi
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Franz Ascui
- Programa de Salud Familiar Comunitaria e Intercultural, Ministerio de Salud Bolivia, La Paz, Bolivia
| | - Jacques Gardon
- Hydrosciences Montpellier, Université de Montpellier, Institut de Recherche pour le Développement, Centre National de la Recherche Scientifique, Montpellier, France
| | - Noemi Tirado
- Genetics Institute, Universidad Mayor de San Andrés, La Paz, Bolivia
| | - Karin Broberg
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Current status of development of methylation biomarkers for in vitro diagnostic IVD applications. Clin Epigenetics 2020; 12:100. [PMID: 32631437 PMCID: PMC7336678 DOI: 10.1186/s13148-020-00886-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/17/2020] [Indexed: 02/06/2023] Open
Abstract
A significant volume of research clearly shows that disease-related methylation changes can be used as biomarkers at all stages of clinical disease management, including risk assessment and predisposition screening through early diagnostics to personalization of patient care and monitoring of the relapse and chronic disease. Thus disease-related methylation changes are an attractive source of the biomarkers that can have significant impact on precision medicine. However, the translation of the research findings in methylation biomarkers field to clinical practice is at the very least not satisfactory. That is mainly because the evidence generated in research studies indicating the utility of the disease-related methylation change to predict clinical outcome is in majority of the cases not sufficient to postulate the diagnostic use of the biomarker. The research studies need to be followed by well-designed and systematic investigations of clinical utility of the biomarker that produce data of sufficient quality to meet regulatory approval for the test to be used to make clinically valid decision. In this review, we describe methylation-based IVD tests currently approved for IVD use or at the advanced stages of the development for the diagnostic use. For each of those tests, we analyze the technologies that the test utilizes for methylation detection as well as describe the types of the clinical studies that were performed to show clinical validity of the test and warrant regulatory approval. The examples reviewed here should help with planning of clinical investigations and delivery of the clinical evidence required for the regulatory approval of potential methylation biomarker based IVD tests.
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Rehman MYA, van Herwijnen M, Krauskopf J, Farooqi A, Kleinjans JCS, Malik RN, Briedé JJ. Transcriptome responses in blood reveal distinct biological pathways associated with arsenic exposure through drinking water in rural settings of Punjab, Pakistan. ENVIRONMENT INTERNATIONAL 2020; 135:105403. [PMID: 31864032 DOI: 10.1016/j.envint.2019.105403] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 10/28/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Groundwater Arsenic (As) contamination is a global public health concern responsible for various health implications and a neglected area of environmental health research in Pakistan. Because of interindividual differences in genetic predisposition, As-related health issues may not be equally distributed among the As-exposed population. However, till date, no studies have been conducted including multiple SNPs involved in As metabolism and disease risk using a linear mixed effect model approach to analyze peripheral blood transcriptomics results. OBJECTIVES In order to detect early responses on the gene expression level and to evaluate the impact of selected SNPs inferring disease risks associated with As exposure, we designed a systematic study to investigate blood transcriptomics profiles of 57 differentially exposed rural subjects living in drinking water As-contaminated settings of Lahore and Kasur districts in Punjab Province in southeast Pakistan. Exposure among the subjects was correlated with individual transcriptome responses applying urinary As profiles as the main biomarker for risk stratification. METHODS We performed whole genome gene expression analysis in blood of subjects using microarrays. Linear effect mixed models were applied for evaluating the combined impact of SNPs hypothetically increasing the risk for As exposure-induced health effects (GSTM1, GSTT1, As3MT, DNMT1, MTHFR, ERCC2 and EGFR). RESULTS Our findings confirmed important signaling, growth factor, cancer and other disease related pathways known to be associated with increased As exposure levels. In addition, upon implementing our integrative SNPs-based genetic risk factor, pathways associated with an increased risk of NAFLD and diabetes appeared significantly enhanced by down-regulation of genes NDUFV3, IKBKB, IL6R, ADIPOR1, PPARA, OGT and FOXO1. CONCLUSION We report the first comprehensive study applying state-of-the-art bioinformatics approaches to address multiple SNP-based inter-individual variability in adverse molecular responses among subjects exposed to drinking water As contamination in Pakistan thereby providing strong evidence of various gene expression targets associated with development of known As-related diseases.
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Affiliation(s)
- Muhammad Yasir Abdur Rehman
- Environmental Health Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Marcel van Herwijnen
- Grow School of Oncology and Developmental Biology, Department of Toxicogenomics, Maastricht University, the Netherlands
| | - Julian Krauskopf
- Grow School of Oncology and Developmental Biology, Department of Toxicogenomics, Maastricht University, the Netherlands
| | - Abida Farooqi
- Environmental Hydro-Geochemistry Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Jos C S Kleinjans
- Grow School of Oncology and Developmental Biology, Department of Toxicogenomics, Maastricht University, the Netherlands
| | - Riffat Naseem Malik
- Environmental Health Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Jacco Jan Briedé
- Grow School of Oncology and Developmental Biology, Department of Toxicogenomics, Maastricht University, the Netherlands.
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12
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Wojdacz TK. Methylation biomarker development in the context of the EU regulations for clinical use of in-vitro diagnostic devices. Expert Rev Mol Diagn 2019; 19:439-441. [PMID: 31092067 DOI: 10.1080/14737159.2019.1618188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tomasz K Wojdacz
- a Head of Clinical Epigenetics Laboratory , Pomeranian Medical University , Szczecin , Poland
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13
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Endogenous interaction profiling identifies DDX5 as an oncogenic coactivator of transcription factor Fra-1. Oncogene 2019; 38:5725-5738. [PMID: 31015574 DOI: 10.1038/s41388-019-0824-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 03/11/2019] [Accepted: 04/02/2019] [Indexed: 01/06/2023]
Abstract
Fra-1, a member of the activator protein 1 (AP-1) family, is overexpressed in triple-negative breast cancer (TNBC) and plays crucial roles in tumor growth. Here we report the identification of 118 proteins interacting with endogenous chromatin-bound Fra-1 in TNBC cells, highlighting DDX5 as the most enriched Fra-1-interacting protein. DDX5, a previously unrecognized protein in the Fra-1 transcriptional network, shows extensive overlap with Fra-1 cistrome and transcriptome that are highly associated with the TNBC cell growth. We provide evidence that DDX5 expression enhances Fra-1 transcriptional activity and potentiates Fra-1-driven cell proliferation. Furthermore, we show that the DDX5 target gene signature predicts poor clinical outcome in breast cancer patients. DDX5 protein level was higher in triple-negative basal-like tumors than in non-basal-like tumors, including luminal A, luminal B, and HER2-enriched subtypes. Collectively, by combining proteomic and genomic approaches we reveal a role for DDX5 as a regulatory protein of Fra-1 signaling and suggest DDX5 as a potential therapeutic target for TNBC.
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14
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Chronic arsenic exposure in drinking water interferes with the balances of T lymphocyte subpopulations as well as stimulates the functions of dendritic cells in vivo. Int Immunopharmacol 2019; 71:115-131. [PMID: 30889423 DOI: 10.1016/j.intimp.2019.03.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 03/09/2019] [Accepted: 03/09/2019] [Indexed: 12/12/2022]
Abstract
The immunomodulatory properties of arsenic are nowadays supposed be associated with pathological injuries of this toxicant and the details have not been clarified. Our objective was to explore inflammation, differentiation of diverse T cell subsets, as well as the phenotypic molecules and functions of dendritic cells (DCs) by chronic arsenic exposure in vivo. We exposed different concentrations of arsenic (0, 0.1, 1 and 10 mg/L) in drinking water for 6 and 12 months in C57BL/6 mice. We first confirmed that low levels of arsenic induced excess inflammation evidenced by accumulation of macrophages and lymphocytes in bronchoalveolar lavage fluid (BALF), secretion of pro-inflammatory cytokine IL-1β in BALF and serum, as well as histological analysis. Flow cytometry analysis revealed that arsenic disturbed CD4/CD8 T-cell ratio in isolated pneumonocytes and splenocytes, as well as enhanced IFN-γ and reduced IL-4 in spleen. The mRNA expressions of transcription factors (T-bet, GATA3, ROR-γt) and cytokines (IFN-γ, IL-4, IL-10, IL-23, IL-22) showed the imbalanced Th1/Th2/Th17 differentiation in arsenic exposed lung and spleen. We further testified that arsenic enhanced the percentages of CD11c+ DCs, and promoted the expressions of antigen presentation molecule MHC II and cytokine IL-12, co-stimulatory molecules (CD86, CD80), and chemokine receptors (CCR7, CCR5) in vivo. Moreover, arsenic activated the expressions of immune-related MAPKs and NF-κB. Taken together, our study here demonstrated that chronic arsenic exposure could disrupt the immune homeostasis in vivo possibly by interfering with the differentiation of Th1/Th2/Th17 subsets as well as the function of DCs.
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15
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Contemporary trends in toxicological research on arsenic. Arch Toxicol 2018; 92:3251-3253. [PMID: 30244273 DOI: 10.1007/s00204-018-2311-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 09/13/2018] [Indexed: 12/27/2022]
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16
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Gliga AR, Engström K, Kippler M, Skröder H, Ahmed S, Vahter M, Raqib R, Broberg K. Prenatal arsenic exposure is associated with increased plasma IGFBP3 concentrations in 9-year-old children partly via changes in DNA methylation. Arch Toxicol 2018; 92:2487-2500. [PMID: 29947889 PMCID: PMC6063321 DOI: 10.1007/s00204-018-2239-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 06/04/2018] [Indexed: 01/20/2023]
Abstract
Exposure to inorganic arsenic (As), a carcinogen and epigenetic toxicant, has been associated with lower circulating levels of insulin-like growth factor 1 (IGF1) and impaired growth in children of pre-school age. The aim of this study was to assess the potential impact of exposure to As on IGF1 and insulin-like growth factor-binding protein 3 (IGFBP3) as well as DNA methylation changes in 9-year-old children. To this end, we studied 9-year-old children from a longitudinal mother-child cohort in rural Bangladesh (n = 551). Prenatal and concurrent exposure to As was assessed via concentrations in maternal urine at gestational week 8 and in child urine at 9 years, measured by HPLC-HG-ICPMS. Plasma IGF1 and IGFBP3 concentrations were quantified with immunoassays. DNA methylation was measured in blood mononuclear cells at 9 years in a sub-sample (n = 113) using the Infinium HumanMethylation450K BeadChip. In multivariable-adjusted linear regression models, prenatal As (natural log-transformed), but not children's concurrent urinary As, was positively associated with IGFBP3 concentrations (β = 76, 95% CI 19, 133). As concentrations were not associated with IGF1. DNA methylation analysis revealed CpGs associated with both prenatal As and IGFBP3. Mediation analysis suggested that methylation of 12 CpG sites for all children was mediator of effect for the association between prenatal As and IGFBP3. We also found differentially methylated regions, generally hypermethylated, that were associated with both prenatal As and IGFBP3. In all, our study revealed that prenatal exposure to As was positively associated with IGFBP3 concentrations in children at 9 years, independent of IGF1, and this association may, at least in part, be epigenetically mediated.
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Affiliation(s)
- Anda R Gliga
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Karin Engström
- Division of Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | - Maria Kippler
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Helena Skröder
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Sultan Ahmed
- Division of Infectious Diseases, icddr,b, Dhaka, Bangladesh
| | - Marie Vahter
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden
| | - Rubhana Raqib
- Division of Infectious Diseases, icddr,b, Dhaka, Bangladesh
| | - Karin Broberg
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, 171 77, Stockholm, Sweden.
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18
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Meehan RR, Thomson JP, Lentini A, Nestor CE, Pennings S. DNA methylation as a genomic marker of exposure to chemical and environmental agents. Curr Opin Chem Biol 2018; 45:48-56. [PMID: 29505975 DOI: 10.1016/j.cbpa.2018.02.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/07/2018] [Accepted: 02/12/2018] [Indexed: 02/06/2023]
Abstract
Recent progress in interpreting comprehensive genetic and epigenetic profiles for human cellular states has contributed new insights into the developmental origins of disease, elucidated novel signalling pathways and enhanced drug discovery programs. A similar comprehensive approach to decoding the epigenetic readouts from chemical challenges in vivo would yield new paradigms for monitoring and assessing environmental exposure in model systems and humans.
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Affiliation(s)
- Richard R Meehan
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh EH4 2XU, UK.
| | - John P Thomson
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh EH4 2XU, UK
| | - Antonio Lentini
- Department of Clinical and Experimental Medicine, Linköping University, Linköping SE 58183, Sweden
| | - Colm E Nestor
- Department of Clinical and Experimental Medicine, Linköping University, Linköping SE 58183, Sweden.
| | - Sari Pennings
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, EH16 4TJ, UK.
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19
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Martin EM, Fry RC. Environmental Influences on the Epigenome: Exposure- Associated DNA Methylation in Human Populations. Annu Rev Public Health 2018; 39:309-333. [PMID: 29328878 DOI: 10.1146/annurev-publhealth-040617-014629] [Citation(s) in RCA: 371] [Impact Index Per Article: 61.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
DNA methylation is the most well studied of the epigenetic regulators in relation to environmental exposures. To date, numerous studies have detailed the manner by which DNA methylation is influenced by the environment, resulting in altered global and gene-specific DNA methylation. These studies have focused on prenatal, early-life, and adult exposure scenarios. The present review summarizes currently available literature that demonstrates a relationship between DNA methylation and environmental exposures. It includes studies on aflatoxin B1, air pollution, arsenic, bisphenol A, cadmium, chromium, lead, mercury, polycyclic aromatic hydrocarbons, persistent organic pollutants, tobacco smoke, and nutritional factors. It also addresses gaps in the literature and future directions for research. These gaps include studies of mixtures, sexual dimorphisms with respect to environmentally associated methylation changes, tissue specificity, and temporal stability of the methylation marks.
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Affiliation(s)
- Elizabeth M Martin
- Department of Environmental Sciences and Engineering, and Curriculum in Toxicology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, USA; ,
| | - Rebecca C Fry
- Department of Environmental Sciences and Engineering, and Curriculum in Toxicology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, USA; ,
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20
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Gera R, Singh V, Mitra S, Sharma AK, Singh A, Dasgupta A, Singh D, Kumar M, Jagdale P, Patnaik S, Ghosh D. Arsenic exposure impels CD4 commitment in thymus and suppress T cell cytokine secretion by increasing regulatory T cells. Sci Rep 2017; 7:7140. [PMID: 28769045 PMCID: PMC5541098 DOI: 10.1038/s41598-017-07271-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 06/27/2017] [Indexed: 01/31/2023] Open
Abstract
Arsenic is globally infamous for inducing immunosuppression associated with prevalence of opportunistic infection in exposed population, although the mechanism remains elusive. In this study, we investigate the effect of arsenic exposure on thymocyte lineage commitment and the involvement of regulatory T cells (Treg) in arsenic-induced immunosuppression. Male Balb/c mice were exposed to 0.038, 0.38 and 3.8 ppm sodium arsenite for 7, 15 and 30 days through oral gavage. Arsenic exposure promoted CD4 lineage commitment in a dose dependent manner supported by the expression of ThPOK in thymus. Arsenic also increased splenic CD4+ T cells and promoted their differentiation into Treg cells. In parallel, arsenic exposure induced immunosuppression characterized by low cytokine secretion from splenocytes and increased susceptibility to Mycobacterium fortuitum (M. fortuitum) infection. Therefore, we linked arsenic-induced rise in Treg cells with suppressed Th1 and Th2 related cytokines, which has been reversed by inhibition of Treg cells in-vivo using wortmannin. Other parameters like body weight, kidney and liver function, histoanatomy of thymus and spleen as well as thymocyte and splenocytes viability were unaltered by arsenic exposure. Taken together our findings indicated that environmentally relevant dose of arsenic enhanced differentiation of Treg cells which in turn induce immunosuppression in experimental animals.
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Affiliation(s)
- Ruchi Gera
- Immunotoxicology Laboratory, Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-IITR campus, Lucknow, 226001, India
| | - Vikas Singh
- Immunotoxicology Laboratory, Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-IITR campus, Lucknow, 226001, India
| | - Sumonto Mitra
- Immunotoxicology Laboratory, Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India
| | - Anuj Kumar Sharma
- Immunotoxicology Laboratory, Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India
| | - Alok Singh
- Microbiology, CSIR- Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Arunava Dasgupta
- Microbiology, CSIR- Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Dhirendra Singh
- Regulatory toxicology, CSIR-Indian Institute of Toxicology Research, Lucknow, Uttar Pradesh, India
| | - Mahadeo Kumar
- Regulatory toxicology, CSIR-Indian Institute of Toxicology Research, Lucknow, Uttar Pradesh, India
| | - Pankaj Jagdale
- Regulatory toxicology, CSIR-Indian Institute of Toxicology Research, Lucknow, Uttar Pradesh, India
| | - Satyakam Patnaik
- Water Analysis Laboratory, Nanotherapeutics and Nanomaterial Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow, Uttar Pradesh, India
| | - Debabrata Ghosh
- Immunotoxicology Laboratory, Food, Drug & Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India.
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Xu H, Medina S, Lauer FT, Douillet C, Liu KJ, Hudson LG, Stýblo M, Aleksunes LM, Burchiel SW. Efflux Transporters Regulate Arsenite-Induced Genotoxicity in Double Negative and Double Positive T Cells. Toxicol Sci 2017; 158:127-139. [PMID: 28472378 PMCID: PMC6257016 DOI: 10.1093/toxsci/kfx075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Arsenite (As+3) exposure is known to cause immunotoxicity in human and animal models. Our previous studies demonstrated that As+3 at 50-500 nM concentrations induced both genotoxicity and nongenotoxicity in mouse thymus cells. Developing T cells at CD4-CD8- double negative (DN) stage, the first stage after early T cells are transported from bone marrow to thymus, were found to be more sensitive to As+3 toxicity than the T cells at CD4 + CD8 + double positive (DP) stage in vitro. Induction of Mdr1 (Abcb1) and Mrp1 (Abcc1), 2 multidrug resistance transporters and exporters of As+3, was associated with the reversal of As+3-induced double strand breaks and DNA damage. In order to confirm that the thymus cell populations have different sensitivity to As+3in vivo, male C57BL/6J mice were exposed to 0, 100, and 500 ppb As+3 in drinking water for 30 d. A significant decrease in DN cell percentage was observed with exposure to 500 ppb As+3. Low to moderate concentrations of As+3 were shown to induce higher genotoxicity in sorted DN than DP cells in vitro. Calcein AM uptake and Mdr1/Mrp1 mRNA quantification results revealed that DN cells not only had limited As+3 exporter activity, but also lacked the ability to activate these exporters with As+3 treatments, resulting in a higher accumulation of intracellular As+3. Knockdown study of As+3 exporters in the DN thymic cell line, D1 using siRNA, demonstrated that Mdr1 and Mrp1 regulate intracellular As+3 accumulation and genotoxicity. Taken together, the results indicate that transporter regulation is an important mechanism for differential genotoxicity induced by As+3 in thymocytes at different developmental stages.
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Affiliation(s)
- Huan Xu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Sebastian Medina
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Fredine T. Lauer
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Laurie G. Hudson
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516
| | - Lauren M. Aleksunes
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Scott W. Burchiel
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
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