1
|
Mustieles V, Pérez-Carrascosa FM, León J, Lange T, Bonde JP, Gómez-Peña C, Artacho-Cordón F, Barrios-Rodríguez R, Olmedo-Requena R, Expósito J, Jiménez-Moleón JJ, Arrebola JP. Adipose Tissue Redox Microenvironment as a Potential Link between Persistent Organic Pollutants and the 16-Year Incidence of Non-hormone-Dependent Cancer. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:9926-9937. [PMID: 34180659 PMCID: PMC8474112 DOI: 10.1021/acs.est.0c08180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We aimed to assess the relationships among the adipose tissue's (AT) oxidative microenvironment, in situ accumulated persistent organic pollutant (POP) concentrations, and cancer development. POP and oxidative stress levels were quantified in AT samples from 382 adults recruited within the GraMo cohort (2003-2004) in Granada (Spain). The 16-year cancer incidence was ascertained by reviewing health/administrative databases. Cox-regression models and mediation analyses were performed. The enzymes superoxide dismutase (SOD) and glutathione reductase (GRd) were positively associated with the risk of non-hormone-dependent (NHD) cancer [adjusted hazard ratio (HR) 1.76; 95% confidence interval (CI): 1.17, 2.64 and HR 2.35; 95% CI: 1.41, 3.94, respectively]. After adjustment for covariates, polychlorinated biphenyl-138 (PCB-138) (HR 1.78; 95% CI: 1.03, 3.09), β-hexachlorocyclohexane (β-HCH) (HR 1.70; 95% CI: 1.09, 2.64), and hexachlorobenzene (HR 1.54; 95% CI: 1.02, 2.33) were also positively associated with the risk of NHD cancer. Although confidence intervals included the null value, probably because of the modest number of cancer cases, we observed a potential mediation effect of SOD and GRd on the associations between β-HCH and the risk of NHD tumors (percent mediated = 33 and 47%, respectively). Our results highlight the relevance of human AT's oxidative microenvironment as a predictor of future cancer risk as well as its potential mediating role on POP-related carcinogenesis. Given their novelty, these findings should be interpreted with caution and confirmed in future studies.
Collapse
Affiliation(s)
- Vicente Mustieles
- Center
for Biomedical Research (CIBM), University
of Granada, Instituto de Investigación Biosanitaria Ibs GRANADA, 18016 Granada, Spain
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Department
of Radiology and Physical Medicine, University
of Granada, 18016 Granada, Spain
| | - Francisco M. Pérez-Carrascosa
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Radiotherapy
and Oncology Department, University Hospital
Virgen de las Nieves Granada, 18014 Granada, Spain
| | - Josefa León
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Unidad
de
Gestión Clínica de Aparato Digestivo, Hospital Universitario San Cecilio de Granada, 18016 Granada, Spain
| | - Theis Lange
- Section
of Biostatistics, Department of Public Health, University of Copenhagen, DK-1165 Copenhagen, Denmark
| | - Jens-Peter Bonde
- Department
of Occupational and Environmental Medicine, Bispebjerg University Hospital, Bispebjerg Bakke 23F, 2400 Copenhagen NV, Denmark
| | - Celia Gómez-Peña
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Unidad
de
Gestión Clínica de Aparato Digestivo, Hospital Universitario San Cecilio de Granada, 18016 Granada, Spain
| | - Francisco Artacho-Cordón
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Department
of Radiology and Physical Medicine, University
of Granada, 18016 Granada, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
| | - Rocío Barrios-Rodríguez
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| | - Rocío Olmedo-Requena
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| | - José Expósito
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Radiotherapy
and Oncology Department, University Hospital
Virgen de las Nieves Granada, 18014 Granada, Spain
| | - José J. Jiménez-Moleón
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| | - Juan P. Arrebola
- Consortium
for Biomedical Research in Epidemiology and Public Health (CIBER Epidemiología
y Salud Pública, CIBERESP), 28029 Madrid, Spain
- Instituto
de Investigación Biosanitaria Ibs GRANADA, 18012 Granada, Spain
- Universidad
de Granada, Departamento de Medicina Preventiva
y Salud Pública, 18016 Granada, Spain
| |
Collapse
|
2
|
Wauchope OR, Mitchener MM, Beavers WN, Galligan JJ, Camarillo JM, Sanders WD, Kingsley PJ, Shim HN, Blackwell T, Luong T, deCaestecker M, Fessel JP, Marnett LJ. Oxidative stress increases M1dG, a major peroxidation-derived DNA adduct, in mitochondrial DNA. Nucleic Acids Res 2018; 46:3458-3467. [PMID: 29438559 PMCID: PMC5909422 DOI: 10.1093/nar/gky089] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 01/29/2018] [Accepted: 02/03/2018] [Indexed: 02/07/2023] Open
Abstract
Reactive oxygen species (ROS) are formed in mitochondria during electron transport and energy generation. Elevated levels of ROS lead to increased amounts of mitochondrial DNA (mtDNA) damage. We report that levels of M1dG, a major endogenous peroxidation-derived DNA adduct, are 50-100-fold higher in mtDNA than in nuclear DNA in several different human cell lines. Treatment of cells with agents that either increase or decrease mitochondrial superoxide levels leads to increased or decreased levels of M1dG in mtDNA, respectively. Sequence analysis of adducted mtDNA suggests that M1dG residues are randomly distributed throughout the mitochondrial genome. Basal levels of M1dG in mtDNA from pulmonary microvascular endothelial cells (PMVECs) from transgenic bone morphogenetic protein receptor 2 mutant mice (BMPR2R899X) (four adducts per 106 dG) are twice as high as adduct levels in wild-type cells. A similar increase was observed in mtDNA from heterozygous null (BMPR2+/-) compared to wild-type PMVECs. Pulmonary arterial hypertension is observed in the presence of BMPR2 signaling disruptions, which are also associated with mitochondrial dysfunction and oxidant injury to endothelial tissue. Persistence of M1dG adducts in mtDNA could have implications for mutagenesis and mitochondrial gene expression, thereby contributing to the role of mitochondrial dysfunction in diseases.
Collapse
Affiliation(s)
- Orrette R Wauchope
- A.B. Hancock, Jr., Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Michelle M Mitchener
- Department of Chemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - William N Beavers
- Department of Chemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - James J Galligan
- A.B. Hancock, Jr., Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Jeannie M Camarillo
- A.B. Hancock, Jr., Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - William D Sanders
- A.B. Hancock, Jr., Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Philip J Kingsley
- A.B. Hancock, Jr., Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Ha-Na Shim
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Thomas Blackwell
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Thong Luong
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Mark deCaestecker
- Departments of Cell and Developmental Biology, Surgery and Medicine, USA
| | - Joshua P Fessel
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Lawrence J Marnett
- A.B. Hancock, Jr., Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Chemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| |
Collapse
|
3
|
Rodgers KM, Udesky JO, Rudel RA, Brody JG. Environmental chemicals and breast cancer: An updated review of epidemiological literature informed by biological mechanisms. ENVIRONMENTAL RESEARCH 2018; 160:152-182. [PMID: 28987728 DOI: 10.1016/j.envres.2017.08.045] [Citation(s) in RCA: 234] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 08/28/2017] [Accepted: 08/29/2017] [Indexed: 05/20/2023]
Abstract
BACKGROUND Many common environmental chemicals are mammary gland carcinogens in animal studies, activate relevant hormonal pathways, or enhance mammary gland susceptibility to carcinogenesis. Breast cancer's long latency and multifactorial etiology make evaluation of these chemicals in humans challenging. OBJECTIVE For chemicals previously identified as mammary gland toxicants, we evaluated epidemiologic studies published since our 2007 review. We assessed whether study designs captured relevant exposures and disease features suggested by toxicological and biological evidence of genotoxicity, endocrine disruption, tumor promotion, or disruption of mammary gland development. METHODS We systematically searched the PubMed database for articles with breast cancer outcomes published in 2006-2016 using terms for 134 environmental chemicals, sources, or biomarkers of exposure. We critically reviewed the articles. RESULTS We identified 158 articles. Consistent with experimental evidence, a few key studies suggested higher risk for exposures during breast development to dichlorodiphenyltrichloroethane (DDT), dioxins, perfluorooctane-sulfonamide (PFOSA), and air pollution (risk estimates ranged from 2.14 to 5.0), and for occupational exposure to solvents and other mammary carcinogens, such as gasoline components (risk estimates ranged from 1.42 to 3.31). Notably, one 50-year cohort study captured exposure to DDT during several critical windows for breast development (in utero, adolescence, pregnancy) and when this chemical was still in use. Most other studies did not assess exposure during a biologically relevant window or specify the timing of exposure. Few studies considered genetic variation, but the Long Island Breast Cancer Study Project reported higher breast cancer risk for polycyclic aromatic hydrocarbons (PAHs) in women with certain genetic variations, especially in DNA repair genes. CONCLUSIONS New studies that targeted toxicologically relevant chemicals and captured biological hypotheses about genetic variants or windows of breast susceptibility added to evidence of links between environmental chemicals and breast cancer. However, many biologically relevant chemicals, including current-use consumer product chemicals, have not been adequately studied in humans. Studies are challenged to reconstruct exposures that occurred decades before diagnosis or access biological samples stored that long. Other problems include measuring rapidly metabolized chemicals and evaluating exposure to mixtures.
Collapse
Affiliation(s)
- Kathryn M Rodgers
- Silent Spring Institute, 320 Nevada Street, Newton, MA 02460, United States.
| | - Julia O Udesky
- Silent Spring Institute, 320 Nevada Street, Newton, MA 02460, United States.
| | - Ruthann A Rudel
- Silent Spring Institute, 320 Nevada Street, Newton, MA 02460, United States.
| | - Julia Green Brody
- Silent Spring Institute, 320 Nevada Street, Newton, MA 02460, United States.
| |
Collapse
|
4
|
Phillips MC, Dheer R, Santaolalla R, Davies JM, Burgueño J, Lang JK, Toborek M, Abreu MT. Intestinal exposure to PCB 153 induces inflammation via the ATM/NEMO pathway. Toxicol Appl Pharmacol 2017; 339:24-33. [PMID: 29197519 DOI: 10.1016/j.taap.2017.11.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 11/08/2017] [Accepted: 11/28/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND Polychlorinated biphenyls (PCBs) are persistent organic pollutants that adversely affect human health. PCBs bio-accumulate in organisms important for human consumption. PCBs accumulation in the body leads to activation of the transcription factor NF-κB, a major driver of inflammation. Despite dietary exposure being one of the main routes of exposure to PCBs, the gut has been widely ignored when studying the effects of PCBs. OBJECTIVES We investigated the effects of PCB 153 on the intestine and addressed whether PCB 153 affected intestinal permeability or inflammation and the mechanism by which this occurred. METHODS Mice were orally exposed to PCB 153 and gut permeability was assessed. Intestinal epithelial cells (IECs) were collected and evaluated for evidence of genotoxicity and inflammation. A human IEC line (SW480) was used to examine the direct effects of PCB 153 on epithelial function. NF-кB activation was measured using a reporter assay, DNA damage was assessed, and cytokine expression was ascertained with real-time PCR. RESULTS Mice orally exposed to PCB 153 had an increase in intestinal permeability and inflammatory cytokine expression in their IECs; inhibition of NF-кB ameliorated both these effects. This inflammation was associated with genotoxic damage and NF-кB activation. Exposure of SW480 cells to PCB 153 led to similar effects as seen in vivo. We found that activation of the ATM/NEMO pathway by genotoxic stress was upstream of NF-kB activation. CONCLUSIONS These results demonstrate that oral exposure to PCB 153 is genotoxic to IECs and induces downstream inflammation and barrier dysfunction in the intestinal epithelium.
Collapse
Affiliation(s)
- Matthew C Phillips
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Rishu Dheer
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Rebeca Santaolalla
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Julie M Davies
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Juan Burgueño
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jessica K Lang
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Michal Toborek
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Maria T Abreu
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA; Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, USA.
| |
Collapse
|
5
|
Gao L, Mutlu E, Collins LB, Walker NJ, Hartwell HJ, Olson JR, Sun W, Gold A, Ball LM, Swenberg JA. DNA Product Formation in Female Sprague-Dawley Rats Following Polyhalogenated Aromatic Hydrocarbon (PHAH) Exposure. Chem Res Toxicol 2017; 30:794-803. [PMID: 28207250 PMCID: PMC5363288 DOI: 10.1021/acs.chemrestox.6b00368] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Indexed: 01/16/2023]
Abstract
DNA oxidation damage has been regarded as one of the possible mechanisms for the hepatic carcinogenesis of dioxin-like compounds (DLCs). In this study, we evaluated the toxic equivalency factor (TEF) from the standpoint of induced DNA oxidation products and their relationship to toxicity and carcinogenicity. Nine DNA oxidation products were analyzed in the liver of female Sprague-Dawley rats exposed to 2,3,7,8-tetrachlorodibenzo-pdioxin (TCDD) alone or the tertiary mixture of TCDD, 3,3',4,4',5-pentachlorobiphenyl (PCB 126), and 2,3,4,7,8-pentachlorodibenzofuran (PeCDF) by gavage for 14, 31, and 53 weeks (5 days/week) by LC-MS/MS: 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dGuo); 1,N6-etheno-2'-deoxyadenosine (1,N6-εdAdo); N2,3-ethenoguanine (N2,3-εG); 7-(2-oxoethly)guanine (7-OEG); 1,N2-etheno-2'-deoxyguanosine (1,N2-εdGuo); malondialdehyde (M1dGuo); acrolein (AcrdGuo); crotonaldehyde (CrdGuo); and 4-hydroxynonenal (HNEdGuo) derived 2'-deoxyguanosine adducts. Exposure to TCDD (100 ng/kg/day) significantly induced 1,N6-εdAdo at 31 and 53 weeks, while no increase of 8-oxo-dGuo was observed. Significant increases were observed for 8-oxo-dGuo and 1,N6-εdAdo at all time points following exposure to the tertiary mixture (TEQ 100 ng/kg/day). Exposure to TCDD for 53 weeks only significantly increased 1,N6-εdAdo, while increases of N2,3-εG and 7-OEG were only found in the highest dose group (100 ng/kg/day). Exposure to the tertiary mixture for 53 weeks had no effect on N2,3-εG in any exposure group (TEQ 0, 22, 46, or 100 ng/kg/day), while significant increases were observed for 1,N6-εdAdo (all dose groups), 8-oxo-dGuo (46 and 100 ng/kg/day), and 7-OEG (100 ng/kg/day). While no significant increase was observed at 53 weeks for 1,N2-εdGuo, M1dGuo, AcrdGuo, or CrdGuo following exposure to TCDD (100 ng/kg/day), all of them were significantly induced in animals exposed to the tertiary mixture (TEQ 100 ng/kg/day). This oxidation DNA product data suggest that the simple TEF methodology cannot be applied to evaluate the diverse patterns of toxic effects induced by DLCs.
Collapse
Affiliation(s)
- Lina Gao
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Esra Mutlu
- National
Toxicology Program, National Institute of
Environmental Health Sciences, NIH, RTP, Durham, North Carolina 27709, United States
| | - Leonard B. Collins
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Nigel J. Walker
- National
Toxicology Program, National Institute of
Environmental Health Sciences, NIH, RTP, Durham, North Carolina 27709, United States
| | - Hadley J. Hartwell
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - James R. Olson
- Department
of Pharmacology and Toxicology, State University
of New York at Buffalo, Buffalo, New York 14214, United States
| | - Wei Sun
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Avram Gold
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Louise M. Ball
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - James A. Swenberg
- Department of Environmental Sciences and Engineering and Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| |
Collapse
|
6
|
Mutlu E, Gao L, Collins LB, Walker NJ, Hartwell HJ, Olson JR, Sun W, Gold A, Ball LM, Swenberg JA. Polychlorinated Biphenyls Induce Oxidative DNA Adducts in Female Sprague-Dawley Rats. Chem Res Toxicol 2016; 29:1335-1344. [PMID: 27436759 PMCID: PMC5020703 DOI: 10.1021/acs.chemrestox.6b00146] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Polychlorinated biphenyls (PCBs) are organic chemicals that were traditionally produced and widely used in industry as mixtures and are presently formed as byproducts of pigment and dye manufacturing. They are known to persist and bioaccumulate in the environment. Some have been shown to induce liver cancer in rodents. Although the mechanism of the toxicity of PCBs is unknown, it has been shown that they increase oxidative stress, including lipid peroxidation. We hypothesized that oxidative stress-induced DNA damage could be a contributor for PCB carcinogenesis and analyzed several DNA adducts in female Sprague-Dawley rats exposed to 3,3',4,4',5-pentachlorobiphenyl (PCB 126), 2,2',4,4',5,5'-hexachlorobiphenyl (PCB 153), and a binary mixture (PCB 126 + 153) for 14, 31, and 53 wks. Eight adducts were measured to profile oxidative DNA lesions, including 8-oxo-deoxyguanosine (8-oxo-dG), 1,N(6)-ethenodeoxyadenosine (1,N(6)-εdA), N(2),3-ethenoguanine (N(2),3-εG), 1,N(2)-ethenodeoxyguanosine (1,N(2)-εdG), as well as malondialdehyde (M1dG), acrolein (AcrdG), crotonaldehyde (CrdG), and 4-hydroxynonenal-derived dG adducts (HNEdG) by LC-MS/MS analysis. Statistically significant increases were observed for 8-oxo-dG and 1,N(6)-εdA concentrations in hepatic DNA of female rats exposed to the binary mixture (1000 ng/kg/day + 1000 μg/kg/day) but not in rats exposed to PCB 126 (1000 ng/kg/day) or PCB 153 (1000 μg/kg/day) for 14 and 31 wks. However, exposure to PCB 126 (1000 ng/kg/day) for 53 wks significantly increased 8-oxo-dG, 1,N(6)-εdA, AcrdG, and M1dG. Exposure to PCB 153 (1000 μg/kg/day) for 53 wks increased 8-oxo-dG, and 1,N(6)-εdA. Exposure to the binary mixture for 53 wks increased 8-oxo-dG, 1,N(6)-εdA, AcrdG, 1,N(2)-εdG, and N(2),3-εG significantly above control groups. Increased hepatic oxidative DNA adducts following exposure to PCB 126, PCB 153, or the binary mixture shows that an increase in DNA damage may play an important role in hepatic toxicity and carcinogenesis in female Sprague-Dawley rats.
Collapse
Affiliation(s)
- Esra Mutlu
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, United States
| | - Lina Gao
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Leonard B. Collins
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Nigel J. Walker
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, United States
| | - Hadley J. Hartwell
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - James R. Olson
- Department of Pharmacology and Toxicology, State University of New York at Buffalo, Buffalo, New York 14214, United States
| | - Wei Sun
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Avram Gold
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Louise M. Ball
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - James A Swenberg
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| |
Collapse
|
7
|
Ctistis G, Schön P, Bakker W, Luthe G. PCDDs, PCDFs, and PCBs co-occurrence in TiO2 nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:4837-4843. [PMID: 26545886 DOI: 10.1007/s11356-015-5628-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 10/15/2015] [Indexed: 06/05/2023]
Abstract
In the present study, we report on the co-occurrence of persistent organic pollutants (POPs) adsorbed on nanoparticular titanium dioxide (TiO2). We report on the finding of polychlorinated dibenzodioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs) on the surface of commercially available TiO2 nanoparticles, being formed during the fabrication process of the TiO2. Thereby, the samples comprise PCBs with higher congener numbers or, in the absence of PCBs, a high concentration of PCDDs and PCDFs. This new class of POPs on an active catalytic surface and the great range of applications of nanoparticular TiO2, such as in color pigments, cosmetics, and inks, give rise to great concern due to their potential toxicity.
Collapse
Affiliation(s)
- Georgios Ctistis
- NanoBioInterface Research Group, School of Life Science and Technology, Saxion University of Applied Sciences, M.H. Tromplaan 28, P.O. Box 70.000, 7500 KB, Enschede, The Netherlands
- Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands
| | - Peter Schön
- NanoBioInterface Research Group, School of Life Science and Technology, Saxion University of Applied Sciences, M.H. Tromplaan 28, P.O. Box 70.000, 7500 KB, Enschede, The Netherlands
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands
| | - Wouter Bakker
- NanoBioInterface Research Group, School of Life Science and Technology, Saxion University of Applied Sciences, M.H. Tromplaan 28, P.O. Box 70.000, 7500 KB, Enschede, The Netherlands
| | - Gregor Luthe
- Department of Occupational and Environmental Health, The University of Iowa, 100 Oakdale Campus, Iowa City, IA, 52242, USA.
- Interdisciplinary Graduate Program in Human Toxicology, The University of Iowa, 100 Oakdale Campus, Iowa City, IA, 52242, USA.
- Luthe Pharma®, Fabrikstrasse 2, 48599, Gronau, Germany.
| |
Collapse
|
8
|
Wauchope OR, Beavers WN, Galligan JJ, Mitchener MM, Kingsley PJ, Marnett LJ. Nuclear Oxidation of a Major Peroxidation DNA Adduct, M1dG, in the Genome. Chem Res Toxicol 2015; 28:2334-42. [PMID: 26469224 DOI: 10.1021/acs.chemrestox.5b00340] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Chronic inflammation results in increased production of reactive oxygen species (ROS), which can oxidize cellular molecules including lipids and DNA. Our laboratory has shown that 3-(2-deoxy-β-d-erythro-pentofuranosyl)pyrimido[1,2-α]purin-10(3H)-one (M1dG) is the most abundant DNA adduct formed from the lipid peroxidation product, malondialdehyde, or the DNA peroxidation product, base propenal. M1dG is mutagenic in bacterial and mammalian cells and is repaired via the nucleotide excision repair system. Here, we report that M1dG levels in intact DNA were increased from basal levels of 1 adduct per 10(8) nucleotides to 2 adducts per 10(6) nucleotides following adenine propenal treatment of RKO, HEK293, or HepG2 cells. We also found that M1dG in genomic DNA was oxidized in a time-dependent fashion to a single product, 6-oxo-M1dG (to ∼ 5 adducts per 10(7) nucleotides), and that this oxidation correlated with a decline in M1dG levels. Investigations in RAW264.7 macrophages indicate the presence of high basal levels of M1dG (1 adduct per 10(6) nucleotides) and the endogenous formation of 6-oxo-M1dG. This is the first report of the production of 6-oxo-M1dG in genomic DNA in intact cells, and it has significant implications for understanding the role of inflammation in DNA damage, mutagenesis, and repair.
Collapse
Affiliation(s)
- Orrette R Wauchope
- A.B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
| | - William N Beavers
- A.B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
| | - James J Galligan
- A.B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
| | - Michelle M Mitchener
- A.B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
| | - Philip J Kingsley
- A.B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
| | - Lawrence J Marnett
- A.B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of †Biochemistry, ‡Chemistry, and §Pharmacology, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
| |
Collapse
|
9
|
Greim H, Albertini RJ. Cellular response to the genotoxic insult: the question of threshold for genotoxic carcinogens. Toxicol Res (Camb) 2015. [DOI: 10.1039/c4tx00078a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Maintenance of cellular integrity is crucial for its physiological function, which is constantly threatened by DNA damage arising from numerous intrinsic and environmental sources.
Collapse
|
10
|
Sustained expression of CYPs and DNA adduct accumulation with continuous exposure to PCB126 and PCB153 through a new delivery method: Polymeric implants. Toxicol Rep 2014; 1:820-833. [PMID: 25530946 PMCID: PMC4266188 DOI: 10.1016/j.toxrep.2014.09.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Polymeric implants successfully achieved continuous exposure to PCBs in rats. PCB126 resulted in significant oxidative DNA damage (8-oxodG) in rat liver and lung. PCB126 or in combination with PCB153 induced PON1 and its activity in the liver. The induction was even greater for PON3 and AhR gene transcription. Co-treatment reduced mammary PCB153 and increased liver PCB126 and PCB153 levels.
A new delivery method via polymeric implants was used for continuous exposure to PCBs. Female Sprague-Dawley rats received subcutaneous polymeric implants containing PCB126 (0.15% load), PCB153 (5% load), or both, for up to 45 d and release kinetics and tissue distribution were measured. PCB153 tissue levels on day 15 were readily detected in lung, liver, mammary and serum, with highest levels in the mammary tissue. PCB126 was detected only in liver and mammary tissues. However, a completely different pharmacokinetics was observed on co-exposure of PCB153 and PCB126, with a 1.8-fold higher levels of PCB153 in the liver whereas a 1.7-fold lower levels in the mammary tissue. PCB126 and PCB153 caused an increase in expression of key PCB-inducible enzymes, CYP 1A1/2 and 2B1/2, respectively. Serum and liver activities of the antioxidant enzymes, PON1 and PON3, and AhR transcription were also significantly increased by PCB126. 32P-postlabeling for polar and lipophilic DNA-adducts showed significant quantitative differences: PCB126 increased 8-oxodG, an oxidative DNA lesion, in liver and lung tissues. Adduct levels in the liver remained upregulated up to 45 d, while some lung DNA adducts declined. This is the first demonstration that continuous low-dose exposure to PCBs via implants can produce sustained tissue levels leading to the accumulation of DNA-adducts in target tissue and induction of indicator enzymes. Collectively, these data demonstrate that this exposure model is a promising tool for long-term exposure studies.
Collapse
|
11
|
Ludewig G, Robertson LW. Polychlorinated biphenyls (PCBs) as initiating agents in hepatocellular carcinoma. Cancer Lett 2013; 334:46-55. [PMID: 23211541 PMCID: PMC3648605 DOI: 10.1016/j.canlet.2012.11.041] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 11/20/2012] [Accepted: 11/25/2012] [Indexed: 12/11/2022]
Abstract
PCBs are carcinogens, but for many decades it was assumed that PCBs may not possess initiating activity. Initiation is a process that involves changes in the DNA sequence, often, but not exclusively produced through DNA adduction by a reactive compound or reactive oxygen species (ROS). DNA adducts can be detected by (32)P-postlabeling, a method that Dr. Ramesh Gupta co-developed and refined. Today these types of assays together with other mechanistic studies provide convincing evidence that specific PCB congeners can be biotransformed to genotoxic and therefore potentially initiating metabolites. This review will provide an overview of our current knowledge of PCBs' genotoxic potential and mechanism of action, emphasizing the contributions of Dr. Ramesh Gupta during his tenures at the Universities of Kentucky and Louisville.
Collapse
Affiliation(s)
- Gabriele Ludewig
- The University of Iowa, 100 Oakdale Campus, IREH, Iowa City, IA 52242-5000, United States.
| | - Larry W Robertson
- The University of Iowa, 100 Oakdale Campus, IREH, Iowa City, IA 52242-5000, United States
| |
Collapse
|
12
|
Gao M, Wu N, Song Y, Jin L, Lou J, Tao H. PCB153-induced oxidative stress and cell apoptosis on cultured rat Sertoli cells. Toxicol Res (Camb) 2013. [DOI: 10.1039/c2tx20043k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
13
|
Jeong YC, Zhang F, Geter DR, Wood AJ, Schisler MR, Gollapudi B, Bartels MJ. Measurement of deoxyinosine adduct: Can it be a reliable tool to assess oxidative or nitrosative DNA damage? Toxicol Lett 2012; 214:226-33. [PMID: 22940193 DOI: 10.1016/j.toxlet.2012.08.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 08/16/2012] [Accepted: 08/17/2012] [Indexed: 11/18/2022]
Abstract
Adenosine deaminases (ADA) are key enzymes that deaminate adenosine (A) or deoxyadenosine (dA) and produce inosine or deoxyinosine (dI), respectively. While ADA only deaminates free dA, reactive nitrogen species (RNS) or reactive oxygen species (ROS) deaminate adenine base on the DNA and leave dI, which is a pre-mutagenic lesion. Therefore, dI adduct in the genomic DNA has been considered a biomarker of DNA damage caused by RNS or by ROS. In the presented study, genomic DNA was isolated from frozen calf thymus in low or room temperature, with or without an addition of antioxidant. The number of dI in the DNA was measured using liquid chromatography-tandem mass spectrometry. While low temperature (LT) work-up with an addition of antioxidant in reagents helped to prevent artifactual formation of oxidative DNA lesions in the calf thymus DNA (CTD), it also significantly inhibited activities of proteinase, which in turn resulted in significant ADA contamination in the final DNA samples. ADA remained in LT-CTD completely deaminated most dA when the DNA was subjected to enzymatic hydrolysis to single nucleosides. The ADA contamination in the DNA was significantly reduced when DNA was isolated from pre-isolated nuclear fraction rather than from entire tissue homogenates. However, enzymes used for DNA hydrolysis were confirmed to contain significant amounts of ADA. Therefore, these enzymes would increase deamination of dA during DNA hydrolysis. Artifactual dI production by contaminated ADA was dramatically reduced by an addition of EHNA (erythro-9-(2-hydroxy-3-nonyl)adenine), which is a potent inhibitor of ADA. However, time- and temperature-dependent dI production from dA in phosphate buffer solution was observed. More importantly, TEMPO, an antioxidant commonly used to prevent DNA oxidation, was found to deaminate dA independent to ADA. Overall, these findings indicate that assay methods measuring dI or other dA DNA adducts in genomic DNA should be carefully validated to minimize artificial errors caused by dA deamination. Recommendations to overcome those technical challenges were discussed in this presentation.
Collapse
Affiliation(s)
- Yo-Chan Jeong
- Toxicology and Environmental Research & Consulting, The Dow Chemical Company, Midland, MI 48674, USA.
| | | | | | | | | | | | | |
Collapse
|
14
|
Shi X, Wahlang B, Wei X, Yin X, Falkner KC, Prough RA, Kim SH, Mueller EG, McClain CJ, Cave M, Zhang X. Metabolomic analysis of the effects of polychlorinated biphenyls in nonalcoholic fatty liver disease. J Proteome Res 2012; 11:3805-15. [PMID: 22686559 DOI: 10.1021/pr300297z] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Polychlorinated biphenyls (PCBs) are persistent organic pollutants and have been associated with abnormal liver enzymes and suspected nonalcoholic fatty liver disease (NAFLD), obesity, and the metabolic syndrome in epidemiological studies. In epidemiological surveys of human PCB exposure, PCB 153 has the highest serum levels among PCB congeners. To determine the hepatic effects of PCB 153 in mice, C57BL/6J mice were fed either a control diet (CD) or a high fat diet (HFD) for 12 weeks, with or without PCB 153 coexposure. The metabolite extracts from mouse livers were analyzed using linear trap quadrupole-Fourier transform ion cyclotron resonance mass spectrometer (LTQ-FTICR MS) via direct infusion nanoelectrospray ionization (DI-nESI) mass spectrometry. The metabolomics analysis indicated no difference in the metabolic profile between mice fed the control diet with PCB 153 exposure (CD+PCB 153) and mice fed the control diet (CD) without PCB 153 exposure. However, compared with CD group, levels of 10 metabolites were increased and 15 metabolites were reduced in mice fed HFD. Moreover, compared to CD+PCB 153 group, the abundances of 6 metabolites were increased and 18 metabolites were decreased in the mice fed high fat diet with PCB 153 exposure (HFD+PCB 153). Compared with HFD group, the abundances of 2 metabolites were increased and of 12 metabolites were reduced in HFD+PCB 153 group. These observations agree with the histological results and indicate that the metabolic effects of PCB 153 were highly dependent on macronutrient interactions with HFD. Antioxidant depletion is likely to be an important consequence of this interaction, as this metabolic disturbance has previously been implicated in obesity and NAFLD.
Collapse
Affiliation(s)
- Xue Shi
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Mitochondrial DNA damage and its consequences for mitochondrial gene expression. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2012; 1819:979-91. [PMID: 22728831 DOI: 10.1016/j.bbagrm.2012.06.002] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 06/06/2012] [Accepted: 06/14/2012] [Indexed: 12/11/2022]
Abstract
How mitochondria process DNA damage and whether a change in the steady-state level of mitochondrial DNA damage (mtDNA) contributes to mitochondrial dysfunction are questions that fuel burgeoning areas of research into aging and disease pathogenesis. Over the past decade, researchers have identified and measured various forms of endogenous and environmental mtDNA damage and have elucidated mtDNA repair pathways. Interestingly, mitochondria do not appear to contain the full range of DNA repair mechanisms that operate in the nucleus, although mtDNA contains types of damage that are targets of each nuclear DNA repair pathway. The reduced repair capacity may, in part, explain the high mutation frequency of the mitochondrial chromosome. Since mtDNA replication is dependent on transcription, mtDNA damage may alter mitochondrial gene expression at three levels: by causing DNA polymerase γ nucleotide incorporation errors leading to mutations, by interfering with the priming of mtDNA replication by the mitochondrial RNA polymerase, or by inducing transcriptional mutagenesis or premature transcript termination. This review summarizes our current knowledge of mtDNA damage, its repair, and its effects on mtDNA integrity and gene expression. This article is part of a special issue entitled: Mitochondrial Gene Expression.
Collapse
|
16
|
Jung D, Matson CW, Collins LB, Laban G, Stapleton HM, Bickham JW, Swenberg JA, Giulio RTD. Genotoxicity in Atlantic killifish (Fundulus heteroclitus) from a PAH-contaminated Superfund site on the Elizabeth River, Virginia. ECOTOXICOLOGY (LONDON, ENGLAND) 2011; 20:1890-9. [PMID: 21706406 PMCID: PMC3203518 DOI: 10.1007/s10646-011-0727-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/18/2011] [Indexed: 05/03/2023]
Abstract
The Atlantic Wood Industries Superfund site (AWI) on the Elizabeth River in Portsmouth, VA is heavily contaminated with polycyclic aromatic hydrocarbons (PAHs) from a wood treatment facility. Atlantic killifish, or mummichog (Fundulus heteroclitus), at this Superfund site are exposed to very high concentrations of several carcinogens. In this study, we measured PAH concentrations in both fish tissues and sediments. Concurrently, we assessed different aspects of genotoxicity in the killifish exposed in situ. Both sediment and tissue PAH levels were significantly higher in AWI samples, relative to a reference site, but the chemistry profile was different between sediments and tissues. Killifish at AWI exhibited higher levels of DNA damage compared to reference fish, as measured via the flow cytometric method (FCM), and the damage was consistent with sediment PAH concentrations. Covalent binding of benzo[a]pyrene (BaP) metabolites to DNA, as measured via LC-MS/MS adduct detection methods, were also elevated and could be partially responsible for the DNA damage. Using similar LC-MS/MS methods, we found no evidence that oxidative DNA adducts had a role in observed genotoxicity.
Collapse
Affiliation(s)
- Dawoon Jung
- Nicholas School of the Environment, Duke University, Durham, NC 27708
- Department of Physiology, Dartmouth Medical School, Hanover, NH 03755
| | - Cole W. Matson
- Nicholas School of the Environment, Duke University, Durham, NC 27708
- Center for the Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, NC 27708
| | - Leonard B. Collins
- Center for Environmental Health and Susceptibility, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599
| | - Geoff Laban
- Center for the Environment, Purdue University, W. Lafayette, IN 47907
| | | | - John W. Bickham
- Center for the Environment, Purdue University, W. Lafayette, IN 47907
| | - James A. Swenberg
- Center for Environmental Health and Susceptibility, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599
| | - Richard T. Di Giulio
- Nicholas School of the Environment, Duke University, Durham, NC 27708
- Corresponding Author: Richard T. Di Giulio Nicholas School of the Environment Duke University Box 90328 Durham, NC 27708-0328 (919) 613-8024
| |
Collapse
|
17
|
DNA damage induced by endogenous aldehydes: current state of knowledge. Mutat Res 2011; 711:13-27. [PMID: 21419140 DOI: 10.1016/j.mrfmmm.2011.03.006] [Citation(s) in RCA: 209] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 03/01/2011] [Accepted: 03/03/2011] [Indexed: 12/16/2022]
Abstract
DNA damage plays a major role in various pathophysiological conditions including carcinogenesis, aging, inflammation, diabetes and neurodegenerative diseases. Oxidative stress and cell processes such as lipid peroxidation and glycation induce the formation of highly reactive endogenous aldehydes that react directly with DNA, form aldehyde-derived DNA adducts and lead to DNA damage. In occasion of persistent conditions that influence the formation and accumulation of aldehyde-derived DNA adducts the resulting unrepaired DNA damage causes deregulation of cell homeostasis and thus significantly contributes to disease phenotype. Some of the most highly reactive aldehydes produced endogenously are 4-hydroxy-2-nonenal, malondialdehyde, acrolein, crotonaldehyde and methylglyoxal. The mutagenic and carcinogenic effects associated with the elevated levels of these reactive aldehydes, especially, under conditions of stress, are attributed to their capability of causing directly modification of DNA bases or yielding promutagenic exocyclic adducts. In this review, we discuss the current knowledge on DNA damage induced by endogenously produced reactive aldehydes in relation to the pathophysiology of human diseases.
Collapse
|
18
|
Ravoori S, Srinivasan C, Pereg D, Robertson LW, Ayotte P, Gupta RC. Protective effects of selenium against DNA adduct formation in Inuit environmentally exposed to PCBs. ENVIRONMENT INTERNATIONAL 2010; 36:980-6. [PMID: 19735942 PMCID: PMC3354714 DOI: 10.1016/j.envint.2009.08.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 08/04/2009] [Accepted: 08/05/2009] [Indexed: 05/13/2023]
Abstract
Dietary habits that expose populations to potential toxicants as well as protective agents simultaneously are a realistic scenario where a meaningful assessment of the interactions and net benefit or damage can be made. A group of Inuit from Salluit, Northern Canada are exposed to high levels of PCBs and selenium, both present in the Inuit traditional foods such as blubber from sea mammals and fatty fish. Blood samples were collected from 83 Inuit, 22-70 years old. Blood selenium and PCB levels were determined previously and ranged from 227 to 2069µg/L and 1.7 to 143µg/L, respectively. DNA isolated from white blood cells were analyzed by modified (32)P-postlabeling adductomics technology that detects a multitude of highly polar to lipophilic adducts. The levels of 8-oxodG adducts ranged from 470 to 7400 adducts/10(9) nucleotides. Other as yet unidentified polar adducts showed a 30 to 800-fold inter-individual variability. Adduct levels were negatively associated with PCB and selenium levels. The subjects were classified into high and low ratio groups, with respect to selenium/PCB. In the high ratio group, the coefficient of selenium is significantly negatively correlated with 8-oxodG (r = -0.38, p = 0.014) and total adducts (r = -0.41, p = 0.009) while there was no correlation within the low selenium/PCB group. This study suggests that increasing selenium has mitigating effect in reducing DNA adducts and therefore, possible negative effects of PCB were not seen. A protective effect of selenium is highlighted.
Collapse
Affiliation(s)
- Srivani Ravoori
- James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202 USA
| | - Cidambi Srinivasan
- Department of Statistics, University of Kentucky, Lexington, KY 40506, USA
| | - Daria Pereg
- Laval University Medical Research Center, Quebec, QC, G1V 5B3, Canada
| | | | - Pierre Ayotte
- Laval University Medical Research Center, Quebec, QC, G1V 5B3, Canada
| | - Ramesh C Gupta
- James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202 USA
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202 USA
- To whom correspondence should be sent at 304E Baxter II Research Building, 580 S. Preston St., Louisville, KY 40202, USA. Phone: 502-852-3682; Fax: 502-852-3662;
| |
Collapse
|
19
|
Maddukuri L, Eoff RL, Choi JY, Rizzo CJ, Guengerich FP, Marnett LJ. In vitro bypass of the major malondialdehyde- and base propenal-derived DNA adduct by human Y-family DNA polymerases κ, ι, and Rev1. Biochemistry 2010; 49:8415-24. [PMID: 20726503 PMCID: PMC2943251 DOI: 10.1021/bi1009024] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
3-(2′-Deoxy-β-d-erythro-pentofuranosyl)pyrimido-[1,2-a]purin-10(3H)-one (M1dG) is the major adduct derived from the reaction of DNA with the lipid peroxidation product malondialdehyde and the DNA peroxidation product base propenal. M1dG is mutagenic in Escherichia coli and mammalian cells, inducing base-pair substitutions (M1dG → A and M1dG → T) and frameshift mutations. Y-family polymerases may contribute to the mutations induced by M1dG in vivo. Previous reports described the bypass of M1dG by DNA polymerases η and Dpo4. The present experiments were conducted to evaluate bypass of M1dG by the human Y-family DNA polymerases κ, ι, and Rev1. M1dG was incorporated into template-primers containing either dC or dT residues 5′ to the adduct, and the template-primers were subjected to in vitro replication by the individual DNA polymerases. Steady-state kinetic analysis of single nucleotide incorporation indicates that dCMP is most frequently inserted by hPol κ opposite the adduct in both sequence contexts, followed by dTMP and dGMP. dCMP and dTMP were most frequently inserted by hPol ι, and only dCMP was inserted by Rev1. hPol κ extended template-primers in the order M1dG:dC > M1dG:dG > M1dG:dT ∼ M1dG:dA, but neither hPol ι nor Rev1 extended M1dG-containing template-primers. Liquid chromatography−mass spectrometry analysis of the products of hPol κ-catalyzed extension verified this preference in the 3′-GXC-5′ template sequence but revealed the generation of a series of complex products in which dAMP is incorporated opposite M1dG in the 3′-GXT-5′ template sequence. The results indicate that DNA hPol κ or the combined action of hPol ι or Rev1 and hPol κ bypass M1dG residues in DNA and generate products that are consistent with some of the mutations induced by M1dG in mammalian cells.
Collapse
Affiliation(s)
- Leena Maddukuri
- A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, USA
| | | | | | | | | | | |
Collapse
|
20
|
Ward EM, Schulte PA, Straif K, Hopf NB, Caldwell JC, Carreón T, DeMarini DM, Fowler BA, Goldstein BD, Hemminki K, Hines CJ, Pursiainen KH, Kuempel E, Lewtas J, Lunn RM, Lynge E, McElvenny DM, Muhle H, Nakajima T, Robertson LW, Rothman N, Ruder AM, Schubauer-Berigan MK, Siemiatycki J, Silverman D, Smith MT, Sorahan T, Steenland K, Stevens RG, Vineis P, Zahm SH, Zeise L, Cogliano VJ. Research recommendations for selected IARC-classified agents. ENVIRONMENTAL HEALTH PERSPECTIVES 2010; 118:1355-62. [PMID: 20562050 PMCID: PMC2957912 DOI: 10.1289/ehp.0901828] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Accepted: 06/18/2010] [Indexed: 05/10/2023]
Abstract
OBJECTIVES There are some common occupational agents and exposure circumstances for which evidence of carcinogenicity is substantial but not yet conclusive for humans. Our objectives were to identify research gaps and needs for 20 agents prioritized for review based on evidence of widespread human exposures and potential carcinogenicity in animals or humans. DATA SOURCES For each chemical agent (or category of agents), a systematic review was conducted of new data published since the most recent pertinent International Agency for Research on Cancer (IARC) Monograph meeting on that agent. DATA EXTRACTION Reviewers were charged with identifying data gaps and general and specific approaches to address them, focusing on research that would be important in resolving classification uncertainties. An expert meeting brought reviewers together to discuss each agent and the identified data gaps and approaches. DATA SYNTHESIS Several overarching issues were identified that pertained to multiple agents; these included the importance of recognizing that carcinogenic agents can act through multiple toxicity pathways and mechanisms, including epigenetic mechanisms, oxidative stress, and immuno- and hormonal modulation. CONCLUSIONS Studies in occupational populations provide important opportunities to understand the mechanisms through which exogenous agents cause cancer and intervene to prevent human exposure and/or prevent or detect cancer among those already exposed. Scientific developments are likely to increase the challenges and complexities of carcinogen testing and evaluation in the future, and epidemiologic studies will be particularly critical to inform carcinogen classification and risk assessment processes.
Collapse
Affiliation(s)
- Elizabeth M Ward
- Epidemiology and Surveillance Research, American Cancer Society, Atlanta Georgia 30303, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Non-dioxin-like-PCBs phosphorylate Mdm2 at Ser166 and attenuate the p53 response in HepG2 cells. Chem Biol Interact 2009; 182:191-8. [DOI: 10.1016/j.cbi.2009.09.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 08/20/2009] [Accepted: 09/06/2009] [Indexed: 11/17/2022]
|
22
|
Eoff RL, Stafford JB, Szekely J, Rizzo CJ, Egli M, Guengerich FP, Marnett LJ. Structural and functional analysis of Sulfolobus solfataricus Y-family DNA polymerase Dpo4-catalyzed bypass of the malondialdehyde-deoxyguanosine adduct. Biochemistry 2009; 48:7079-88. [PMID: 19492857 PMCID: PMC2717710 DOI: 10.1021/bi9003588] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
Oxidative stress can induce the formation of reactive electrophiles, such as DNA peroxidation products, e.g., base propenals, and lipid peroxidation products, e.g., malondialdehyde. Base propenals and malondialdehyde react with DNA to form adducts, including 3-(2′-deoxy-β-d-erythro-pentofuranosyl)pyrimido[1,2-α]purin-10(3H)-one (M1dG). When paired opposite cytosine in duplex DNA at physiological pH, M1dG undergoes ring opening to form N2-(3-oxo-1-propenyl)-dG (N2-OPdG). Previous work has shown that M1dG is mutagenic in bacteria and mammalian cells and that its mutagenicity in Escherichia coli is dependent on induction of the SOS response, indicating a role for translesion DNA polymerases in the bypass of M1dG. To probe the mechanism by which translesion polymerases bypass M1dG, kinetic and structural studies were conducted with a model Y-family DNA polymerase, Dpo4 from Sulfolobus solfataricus. The level of steady-state incorporation of dNTPs opposite M1dG was reduced 260−2900-fold and exhibited a preference for dATP incorporation. Liquid chromatography−tandem mass spectrometry analysis of the full-length extension products revealed a spectrum of products arising principally by incorporation of dC or dA opposite M1dG followed by partial or full-length extension. A greater proportion of −1 deletions were observed when dT was positioned 5′ of M1dG. Two crystal structures were determined, including a “type II” frameshift deletion complex and another complex with Dpo4 bound to a dC·M1dG pair located in the postinsertion context. Importantly, M1dG was in the ring-closed state in both structures, and in the structure with dC opposite M1dG, the dC residue moved out of the Dpo4 active site, into the minor groove. The results are consistent with the reported mutagenicity of M1dG and illustrate how the lesion may affect replication events.
Collapse
Affiliation(s)
- Robert L Eoff
- Department of Chemistry, A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Vanderbilt Institute of Chemical Biology, Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, USA
| | | | | | | | | | | | | |
Collapse
|
23
|
Spencer WA, Lehmler HJ, Robertson LW, Gupta RC. Oxidative DNA adducts after Cu(2+)-mediated activation of dihydroxy PCBs: role of reactive oxygen species. Free Radic Biol Med 2009; 46:1346-52. [PMID: 19233261 PMCID: PMC2744390 DOI: 10.1016/j.freeradbiomed.2009.02.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 02/09/2009] [Accepted: 02/12/2009] [Indexed: 11/22/2022]
Abstract
Polychlorinated biphenyls (PCBs) are toxic industrial chemicals, complete carcinogens, and efficacious tumor promoters. However, the mechanism(s) of PCB-mediated carcinogenicity remains largely undefined. One likely pathway by which these agents may play a role in carcinogenesis is the generation of oxidative DNA damage by redox cycling of dihydroxylated PCB metabolites. We have now employed a new (32)P-postlabeling system to examine novel oxidative DNA lesions induced by Cu(2+)-mediated activation of PCB metabolites. (32)P postlabeling of DNA incubated with various PCB metabolites resulted in over a dozen novel polar oxidative DNA adducts that were chromatographically similar for all active agents. The most potent metabolites tested were the hydroquinones (hydroxyl groups arranged para to each other), yielding polar oxidative adduct levels ranging from 55 to 142 adducts/10(6) nucleotides. PCB catechols, or ortho-dihydroxy metabolites, were up to 40% less active than their corresponding hydroquinone congeners, whereas monohydroxylated and quinone metabolites did not produce detectable oxidative damage over that of vehicle. With the exception of 2,4,5-Cl-2',5'-dihydroxybiphenyl, this oxidative DNA damage seemed to be inversely related to chlorine content: no chlorine approximately mono->di->trichlorinated metabolites. Importantly, copper, but not iron, was essential for activation of the PCB metabolites to these polar oxidative DNA adducts, because in its absence or in the presence of the Cu(+)-specific scavenger bathocuproine, no adducts were detected. Intervention studies with known reactive oxygen species (ROS) modifiers suggested that H(2)O(2), singlet oxygen, hydroxyl radical, and superoxide may also be involved in this PCB-mediated oxidative DNA damage. These data indicate a mechanistic role for several ROS, in addition to copper, in PCB-induced DNA damage and provide further support for oxidative DNA damage in PCB-mediated carcinogenesis.
Collapse
Affiliation(s)
- Wendy A. Spencer
- James Graham Brown Cancer Center and Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202
| | - Hans-Joachim Lehmler
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242
| | - Larry W. Robertson
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242
| | - Ramesh C. Gupta
- James Graham Brown Cancer Center and Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202
- Correspondence to Dr. Ramesh Gupta, 304 E Delia Baxter II, 580 Preston Street, University of Louisville Medical School, Louisville, KY 40202. Telephone: 502-852-3682;
| |
Collapse
|