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Gibbs-Flournoy EA, Gilmour MI, Higuchi M, Jetter J, George I, Copeland L, Harrison R, Moser VC, Dye JA. Differential exposure and acute health impacts of inhaled solid-fuel emissions from rudimentary and advanced cookstoves in female CD-1 mice. ENVIRONMENTAL RESEARCH 2018; 161:35-48. [PMID: 29100208 PMCID: PMC6143295 DOI: 10.1016/j.envres.2017.10.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/25/2017] [Accepted: 10/24/2017] [Indexed: 05/04/2023]
Abstract
BACKGROUND There is an urgent need to provide access to cleaner end user energy technologies for the nearly 40% of the world's population who currently depend on rudimentary cooking and heating systems. Advanced cookstoves (CS) are designed to cut emissions and solid-fuel consumption, thus reducing adverse human health and environmental impacts. STUDY PREMISE We hypothesized that, compared to a traditional (Tier 0) three-stone (3-S) fire, acute inhalation of solid-fuel emissions from advanced natural-draft (ND; Tier 2) or forced-draft (FD; Tier 3) stoves would reduce exposure biomarkers and lessen pulmonary and innate immune system health effects in exposed mice. RESULTS Across two simulated cooking cycles (duration ~ 3h), emitted particulate mass concentrations were reduced 80% and 62% by FD and ND stoves, respectively, compared to the 3-S fire; with corresponding decreases in particles visible within murine alveolar macrophages. Emitted carbon monoxide was reduced ~ 90% and ~ 60%, respectively. Only 3-S-fire-exposed mice had increased carboxyhemoglobin levels. Emitted volatile organic compounds were FD ≪ 3-S-fire ≤ ND stove; increased expression of genes involved in xenobiotic metabolism (COX-2, NQO1, CYP1a1) was detected only in ND- and 3-S-fire-exposed mice. Diminished macrophage phagocytosis was observed in the ND group. Lung glutathione was significantly depleted across all CS groups, however the FD group had the most severe, ongoing oxidative stress. CONCLUSIONS These results are consistent with reports associating exposure to solid fuel stove emissions with modulation of the innate immune system and increased susceptibility to infection. Lower respiratory infections continue to be a leading cause of death in low-income economies. Notably, 3-S-fire-exposed mice were the only group to develop acute lung injury, possibly because they inhaled the highest concentrations of hazardous air toxicants (e.g., 1,3-butadiene, toluene, benzene, acrolein) in association with the greatest number of particles, and particles with the highest % organic carbon. However, no Tier 0-3 ranked CS group was without some untoward health effect indicating that access to still cleaner, ideally renewable, energy technologies for cooking and heating is warranted.
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Affiliation(s)
| | - M Ian Gilmour
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Mark Higuchi
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - James Jetter
- National Risk Management Research Laboratory (NRMRL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Ingrid George
- National Risk Management Research Laboratory (NRMRL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Lisa Copeland
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Randy Harrison
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Virginia C Moser
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Janice A Dye
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
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Meredith EL, Kumar A, Konno A, Szular J, Alsford S, Seifert K, Horn D, Wilkinson SR. Distinct activation mechanisms trigger the trypanocidal activity of DNA damaging prodrugs. Mol Microbiol 2017; 106:207-222. [PMID: 28792090 PMCID: PMC5656836 DOI: 10.1111/mmi.13767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2017] [Indexed: 02/02/2023]
Abstract
Quinone‐based compounds have been exploited to treat infectious diseases and cancer, with such chemicals often functioning as inhibitors of key metabolic pathways or as prodrugs. Here, we screened an aziridinyl 1,4‐benzoquinone (ABQ) library against the causative agents of trypanosomiasis, and cutaneous leishmaniasis, identifying several potent structures that exhibited EC50 values of <100 nM. However, these compounds also displayed significant toxicity towards mammalian cells indicating that they are not suitable therapies for systemic infections. Using anti‐T. brucei ABQs as chemical probes, we demonstrated that these exhibit different trypanocidal modes of action. Many functioned as type I nitroreductase (TbNTR) or cytochrome P450 reductase (TbCPR) dependent prodrugs that, following activation, generate metabolites which promote DNA damage, specifically interstrand crosslinks (ICLs). Trypanosomes lacking TbSNM1, a nuclease that specifically repairs ICLs, are hypersensitive to most ABQ prodrugs, a phenotype exacerbated in cells also engineered to express elevated levels of TbNTR or TbCPR. In contrast, ABQs that contain substituent groups on the biologically active aziridine do not function as TbNTR or TbCPR‐activated prodrugs and do not promote DNA damage. By unravelling how ABQs mediate their activities, features that facilitate the desired anti‐parasitic growth inhibitory effects could be incorporated into new, safer compounds targeting these neglected tropical diseases.
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Affiliation(s)
- Emma Louise Meredith
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Ambika Kumar
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Aya Konno
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Joanna Szular
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Sam Alsford
- Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, UK
| | - Karin Seifert
- Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, UK
| | - David Horn
- The Wellcome Trust Centre for Anti-Infectives Research, School of Life Sciences, University of Dundee, Dundee, UK
| | - Shane R Wilkinson
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
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3
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Iu M, Zago M, Rico de Souza A, Bouttier M, Pareek S, White JH, Hamid Q, Eidelman DH, Baglole CJ. RelB attenuates cigarette smoke extract-induced apoptosis in association with transcriptional regulation of the aryl hydrocarbon receptor. Free Radic Biol Med 2017; 108:19-31. [PMID: 28254546 DOI: 10.1016/j.freeradbiomed.2017.02.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 02/22/2017] [Accepted: 02/23/2017] [Indexed: 10/20/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a chronic and prevalent respiratory disease caused primarily by long term inhalation of cigarette smoke. A major hallmark of COPD is elevated apoptosis of structural lung cells including fibroblasts. The NF-κB member RelB may suppress apoptosis in response to cigarette smoke, but its role in lung cell survival is not known. RelB may act as a pro-survival factor by controlling the expression of superoxide dismutase 2 (SOD2). SOD2 is also regulated by the aryl hydrocarbon receptor (AhR), a ligand-activated transcription factor that suppresses cigarette smoke-induced apoptosis. As the AhR is also a binding partner for RelB, we speculate that RelB suppresses cigarette smoke-induced apoptosis by regulating the AhR. Using an in vitro model of cigarette smoke exposure (cigarette smoke extract [CSE]), we found that CSE down-regulated RelB expression in mouse lung fibroblasts, which was associated with elevated levels of cleaved PARP. Genetic ablation of RelB elevated CSE-induced apoptosis, including chromatin condensation, and reduced mitochondrial function. There was also more reactive oxygen species production in RelB-/- cells exposed to CSE. While there was no alteration in Nrf2 expression or localization between RelB-/- and wild type cells in response to CSE, RelB-/- cells displayed significantly decreased AhR mRNA and protein expression, concomitant with loss of AhR target gene expression (Cyp1a1, Cyp1b1, Nqo1). Finally, we found that RelB binds to the Ahr gene at 3 sites to potentially increase its expression via transcriptional induction. These data support that RelB suppresses cigarette smoke-induced apoptosis, potentially by increasing the AhR. Together, these two proteins may comprise an important cell survival signaling pathway that reduces apoptosis upon cigarette smoke exposure.
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Affiliation(s)
- Matthew Iu
- Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Michela Zago
- Research Institute of the McGill University Health Centre (RI MUHC), Montreal, Quebec, Canada
| | - Angela Rico de Souza
- Research Institute of the McGill University Health Centre (RI MUHC), Montreal, Quebec, Canada
| | - Manuella Bouttier
- Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Swati Pareek
- Department of Pathology, McGill University, Montreal, Quebec, Canada
| | - John H White
- Department of Medicine, McGill University, Montreal, Quebec, Canada; Department of Physiology, McGill University, Montreal, Quebec, Canada
| | - Qutayba Hamid
- Department of Medicine, McGill University, Montreal, Quebec, Canada; Department of Pathology, McGill University, Montreal, Quebec, Canada; Research Institute of the McGill University Health Centre (RI MUHC), Montreal, Quebec, Canada
| | - David H Eidelman
- Department of Medicine, McGill University, Montreal, Quebec, Canada; Research Institute of the McGill University Health Centre (RI MUHC), Montreal, Quebec, Canada
| | - Carolyn J Baglole
- Department of Medicine, McGill University, Montreal, Quebec, Canada; Department of Pathology, McGill University, Montreal, Quebec, Canada; Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada; Research Institute of the McGill University Health Centre (RI MUHC), Montreal, Quebec, Canada.
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4
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Di Francesco A, Di Germanio C, Panda AC, Huynh P, Peaden R, Navas-Enamorado I, Bastian P, Lehrmann E, Diaz-Ruiz A, Ross D, Siegel D, Martindale JL, Bernier M, Gorospe M, Abdelmohsen K, de Cabo R. Novel RNA-binding activity of NQO1 promotes SERPINA1 mRNA translation. Free Radic Biol Med 2016; 99:225-233. [PMID: 27515817 PMCID: PMC5107118 DOI: 10.1016/j.freeradbiomed.2016.08.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 07/31/2016] [Accepted: 08/07/2016] [Indexed: 12/21/2022]
Abstract
NAD(P)H: quinone oxidoreductase (NQO1) is essential for cell defense against reactive oxidative species, cancer, and metabolic stress. Recently, NQO1 was found in ribonucleoprotein (RNP) complexes, but NQO1-interacting mRNAs and the functional impact of such interactions are not known. Here, we used ribonucleoprotein immunoprecipitation (RIP) and microarray analysis to identify comprehensively the subset of NQO1 target mRNAs in human hepatoma HepG2 cells. One of its main targets, SERPINA1 mRNA, encodes the serine protease inhibitor α-1-antitrypsin, A1AT, which is associated with disorders including obesity-related metabolic inflammation, chronic obstructive pulmonary disease (COPD), liver cirrhosis and hepatocellular carcinoma. Biotin pulldown analysis indicated that NQO1 can bind the 3' untranslated region (UTR) and the coding region (CR) of SERPINA1 mRNA. NQO1 did not affect SERPINA1 mRNA levels; instead, it enhanced the translation of SERPINA1 mRNA, as NQO1 silencing decreased the size of polysomes forming on SERPINA1 mRNA and lowered the abundance of A1AT. Luciferase reporter analysis further indicated that NQO1 regulates SERPINA1 mRNA translation through the SERPINA1 3'UTR. Accordingly, NQO1-KO mice had reduced hepatic and serum levels of A1AT and increased activity of neutrophil elastase (NE), one of the main targets of A1AT. We propose that this novel mechanism of action of NQO1 as an RNA-binding protein may help to explain its pleiotropic biological effects.
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Affiliation(s)
- Andrea Di Francesco
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Clara Di Germanio
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Amaresh C Panda
- RNA Regulation Section, Laboratory of Genetics and Genomics, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Phu Huynh
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Robert Peaden
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Ignacio Navas-Enamorado
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Paul Bastian
- RNA Regulation Section, Laboratory of Genetics and Genomics, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Elin Lehrmann
- RNA Regulation Section, Laboratory of Genetics and Genomics, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Alberto Diaz-Ruiz
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - David Ross
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, 12858 East Montview Blvd., Aurora, CO 80045, USA
| | - David Siegel
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, 12858 East Montview Blvd., Aurora, CO 80045, USA
| | - Jennifer L Martindale
- RNA Regulation Section, Laboratory of Genetics and Genomics, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Michel Bernier
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Myriam Gorospe
- RNA Regulation Section, Laboratory of Genetics and Genomics, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA
| | - Kotb Abdelmohsen
- RNA Regulation Section, Laboratory of Genetics and Genomics, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA.
| | - Rafael de Cabo
- Experimental Gerontology Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Blvd., Suite 100, Baltimore, MD 21224, USA.
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5
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Diao J, Bao J, Peng J, Mo J, Ye Q, He J. Correlation between NAD(P)H: quinone oxidoreductase 1 C609T polymorphism and increased risk of esophageal cancer: evidence from a meta-analysis. Ther Adv Med Oncol 2016; 9:13-21. [PMID: 28203294 DOI: 10.1177/1758834016668682] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
NAD(P)H: quinone oxidoreductase 1 (NQO1) C609T gene polymorphisms have been reported to influence the risk for esophageal cancer (EC) in many studies. However, the results remain controversial and ambiguous. We performed a meta-analysis, which included 13 independent studies with a total of 2357 subjects, to examine the association between NQO1 C609T polymorphism and EC. The association was assessed by five different gene models. The overall analysis suggested that the variant allele and genotypes were significantly related to increased risk of EC (odds ratio [OR] T versus C = 1.15, 95% confidence interval [CI] 0.95-1.40, probability of rejection [POR] = 0.014; OR TT versus CC = 1.32, 95% CI 1.01-1.73, POR = 0.045; OR TC versus CC = 1.32, 95% CI 0.98-1.21, POR = 0.128; OR TT + TC versus CC = 1.10, 95% CI 1.00-1.20, POR = 0.05; OR TT versus CC + TC = 1.26, 95% CI 0.95-1.57, POR = 0.103). Sensitivity analysis confirmed the reliability of these findings. Our study shows that individuals carrying the NQO1 C609T variant allele and genotypes are more susceptible to EC.
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Affiliation(s)
- Jingfang Diao
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of TCM), Guangzhou, People's Republic of China
| | - Jie Bao
- Department of Internal Medicine, Hospital of South China Normal University, Guangzhou, People's Republic of China
| | - Jianxin Peng
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of TCM), Guangzhou, People's Republic of China
| | - Jiaqiang Mo
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of TCM), Guangzhou, People's Republic of China
| | - Qing Ye
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of TCM), Guangzhou, People's Republic of China
| | - Junming He
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of TCM), Guangzhou 510120, People's Republic of China
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Simcox JA, Mitchell TC, Gao Y, Just SF, Cooksey R, Cox J, Ajioka R, Jones D, Lee SH, King D, Huang J, McClain DA. Dietary iron controls circadian hepatic glucose metabolism through heme synthesis. Diabetes 2015; 64:1108-19. [PMID: 25315005 PMCID: PMC4375081 DOI: 10.2337/db14-0646] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The circadian rhythm of the liver maintains glucose homeostasis, and disruption of this rhythm is associated with type 2 diabetes. Feeding is one factor that sets the circadian clock in peripheral tissues, but relatively little is known about the role of specific dietary components in that regard. We assessed the effects of dietary iron on circadian gluconeogenesis. Dietary iron affects circadian glucose metabolism through heme-mediated regulation of the interaction of nuclear receptor subfamily 1 group d member 1 (Rev-Erbα) with its cosuppressor nuclear receptor corepressor 1 (NCOR). Loss of regulated heme synthesis was achieved by aminolevulinic acid (ALA) treatment of mice or cultured cells to bypass the rate-limiting enzyme in hepatic heme synthesis, ALA synthase 1 (ALAS1). ALA treatment abolishes differences in hepatic glucose production and in the expression of gluconeogenic enzymes seen with variation of dietary iron. The differences among diets are also lost with inhibition of heme synthesis with isonicotinylhydrazine. Dietary iron modulates levels of peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), a transcriptional activator of ALAS1, to affect hepatic heme. Treatment of mice with the antioxidant N-acetylcysteine diminishes PGC-1α variation observed among the iron diets, suggesting that iron is acting through reactive oxygen species signaling.
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Affiliation(s)
- Judith A Simcox
- Department of Biochemistry, University of Utah, Salt Lake City, UT
| | | | - Yan Gao
- Department of Biochemistry, University of Utah, Salt Lake City, UT
| | - Steven F Just
- Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Robert Cooksey
- Veterans Administration Research Service, VA Salt Lake City Health Care System, Salt Lake City, UT
| | - James Cox
- Department of Biochemistry, University of Utah, Salt Lake City, UT
| | - Richard Ajioka
- Department of Biochemistry, University of Utah, Salt Lake City, UT
| | - Deborah Jones
- Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Soh-Hyun Lee
- Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Daniel King
- Department of Biochemistry, University of Utah, Salt Lake City, UT
| | - Jingyu Huang
- Department of Biochemistry, University of Utah, Salt Lake City, UT
| | - Donald A McClain
- Department of Biochemistry, University of Utah, Salt Lake City, UT Department of Internal Medicine, University of Utah, Salt Lake City, UT Veterans Administration Research Service, VA Salt Lake City Health Care System, Salt Lake City, UT
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Sampath V, Garland JS, Helbling D, Dimmock D, Mulrooney NP, Simpson PM, Murray JC, Dagle JM. Antioxidant response genes sequence variants and BPD susceptibility in VLBW infants. Pediatr Res 2015; 77:477-83. [PMID: 25518008 PMCID: PMC4522928 DOI: 10.1038/pr.2014.200] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 09/25/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND Lung injury resulting from oxidative stress contributes to bronchopulmonary dysplasia (BPD) pathogenesis. Nuclear factor erythroid-2 related factor-2 (NFE2L2) regulates cytoprotective responses to oxidative stress by inducing enzymes containing antioxidant response elements (ARE). We hypothesized that ARE genetic variants will modulate susceptibility or severity of BPD in very-low-birth-weight (VLBW) infants. METHODS Blood samples obtained from VLBW infants were used for genotyping variants in the SOD2, NFE2L2, GCLC, GSTP1, HMOX1, and NQO1 genes. SNPs were genotyped utilizing TaqMan probes (Applied Biosystems (ABI), Grand Island, NY), and data were analyzed using the ABI HT7900. Genetic dominance and recessive models were tested to determine associations between SNPs and BPD. RESULTS In our cohort (n = 659), 284 infants had BPD; 135 of whom developed severe BPD. Presence of the hypomorphic NQO1 SNP (rs1800566) in a homozygous state was associated with increased BPD, while presence of the NFE2L2 SNP (rs6721961) was associated with decreased severe BPD in the entire cohort and in Caucasian infants. In regression models that adjusted for epidemiological confounders, the NQO1 and the NFE2L2 SNPs were associated with BPD and severe BPD, respectively. CONCLUSION Genetic variants in NFE2L2-ARE axis may contribute to the variance in liability to BPD observed in preterm infants. These results require confirmation in independent cohorts.
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Affiliation(s)
- Venkatesh Sampath
- Department of Pediatrics, Medical College of Wisconsin, and Children’s Research Institute, Children’s Hospital and Health Systems, Milwaukee, WI, USA
| | - Jeffery S. Garland
- Department of Pediatrics, Wheaton Franciscan Health Care, Milwaukee, WI, USA
| | - Daniel Helbling
- Department of Pediatrics, Medical College of Wisconsin, and Children’s Research Institute, Children’s Hospital and Health Systems, Milwaukee, WI, USA
| | - David Dimmock
- Department of Pediatrics, Medical College of Wisconsin, and Children’s Research Institute, Children’s Hospital and Health Systems, Milwaukee, WI, USA
| | | | - Pippa M. Simpson
- Quantitative Health Sciences, Children’s Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jeffrey C. Murray
- Department of Pediatrics, Iowa Children’s Hospital, University of Iowa, Iowa City, IA
| | - John M. Dagle
- Department of Pediatrics, Iowa Children’s Hospital, University of Iowa, Iowa City, IA
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Korytina GF, Akhmadishina LZ, Kochetova OV, Burduk YV, Aznabaeva YG, Zagidullin SZ, Victorova TV. Association of genes involved in nicotine and tobacco smoke toxicant metabolism (CHRNA3/5, CYP2A6, and NQO1) and DNA repair (XRCC1, XRCC3, XPC, and XPA) with chronic obstructive pulmonary disease. Mol Biol 2014. [DOI: 10.1134/s0026893314060090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
Oxidative stress has many implications in the pathogenesis of lung diseases. In this review, we provide an overview of Reactive Oxygen Species (ROS) and nitrogen (RNS) species and antioxidants, how they relate to normal physiological function and the pathophysiology of different lung diseases, and therapeutic strategies. The production of ROS/RNS from endogenous and exogenous sources is first discussed, followed by antioxidant systems that restore oxidative balance and cellular homeostasis. The contribution of oxidant/antioxidant imbalance in lung disease pathogenesis is also discussed. An overview of therapeutic strategies is provided, such as augmenting NO bioactivity, blocking the production of ROS/RNS and replacement of deficient antioxidants. The limitations of current strategies and failures of clinical trials are then addressed, followed by discussion of novel experimental approaches for the development of improved antioxidant therapies.
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Li F, Wiegman C, Seiffert JM, Zhu J, Clarke C, Chang Y, Bhavsar P, Adcock I, Zhang J, Zhou X, Chung KF. Effects of N-acetylcysteine in ozone-induced chronic obstructive pulmonary disease model. PLoS One 2013; 8:e80782. [PMID: 24260479 PMCID: PMC3832609 DOI: 10.1371/journal.pone.0080782] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 10/07/2013] [Indexed: 11/21/2022] Open
Abstract
Introduction Chronic exposure to high levels of ozone induces emphysema and chronic inflammation in mice. We determined the recovery from ozone-induced injury and whether an antioxidant, N-acetylcysteine (NAC), could prevent or reverse the lung damage. Methods Mice were exposed to ozone (2.5 ppm, 3 hours/12 exposures, over 6 weeks) and studied 24 hours (24h) or 6 weeks (6W) later. Nac (100 mg/kg, intraperitoneally) was administered either before each exposure (preventive) or after completion of exposure (therapeutic) for 6 weeks. Results After ozone exposure, there was an increase in functional residual capacity, total lung volume, and lung compliance, and a reduction in the ratio of forced expiratory volume at 25 and 50 milliseconds to forced vital capacity (FEV25/FVC, FEV50/FVC). Mean linear intercept (Lm) and airway hyperresponsiveness (AHR) to acetylcholine increased, and remained unchanged at 6W after cessation of exposure. Preventive NAC reduced the number of BAL macrophages and airway smooth muscle (ASM) mass. Therapeutic NAC reversed AHR, and reduced ASM mass and apoptotic cells. Conclusion Emphysema and lung function changes were irreversible up to 6W after cessation of ozone exposure, and were not reversed by NAC. The beneficial effects of therapeutic NAC may be restricted to the ASM.
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Affiliation(s)
- Feng Li
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Department of Respiratory Medicine, the Affiliated First People’s Hospital of Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Cornelis Wiegman
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Joanna M. Seiffert
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Jie Zhu
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Colin Clarke
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Yan Chang
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Pank Bhavsar
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Ian Adcock
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Junfeng Zhang
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Xin Zhou
- Department of Respiratory Medicine, the Affiliated First People’s Hospital of Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Kian Fan Chung
- Experimental Studies Unit, National Heart and Lung Institute, Imperial College London, London, United Kingdom
- * E-mail:
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Cornejo P, Vargas R, Videla LA. Nrf2-regulated phase-II detoxification enzymes and phase-III transporters are induced by thyroid hormone in rat liver. Biofactors 2013; 39:514-21. [PMID: 23554160 DOI: 10.1002/biof.1094] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 12/28/2012] [Indexed: 01/09/2023]
Abstract
Thyroid hormone (T₃)-induced calorigenesis triggers the hepatic production of reactive oxygen species (ROS) and redox-sensitive nuclear transcription factor erythroid 2-related factor 2 (Nrf2) activation. The aim of this study was to test the hypothesis that in vivo T₃ administration upregulates the expression of phase II and III detoxification proteins that is controlled by Nrf2. Male Sprague-Dawley rats were given a single intraperitoneal dose of 0.1 mg T₃/kg or T₃ vehicle (controls). After treatment, rectal temperature of the animals, liver Nrf2 DNA binding (EMSA), protein levels of epoxide hydrolase 1 (Eh1), NADPH-quinone oxidoreductase 1 (NQO1), glutathione-S-transferases Ya (GST Ya) and Yp (GST Yp), and multidrug resistance-associated proteins 2 (MRP-2) and 4 (MRP-4) (Western blot), and MRP-3 (RT-PCR) were determined at different times. T₃ significantly rose the rectal temperature of the animals in the time period studied, concomitantly with increases (P < 0.05) of liver Nrf2 DNA binding at 1 and 2 h after treatment, which was normalized at 4-12 h. Within 1-2 h after T₃ treatment, liver phase II enzymes Eh1, NQO1, GST Ya, and GST Yp were enhanced (P < 0.05) as did phase III transporters MRP-2 and MRP-3, whereas MRP-4 remained unchanged. In conclusion, enhancement of liver Nrf2 DNA binding elicited by in vivo T₃ administration is associated with upregulation of the expression of detoxification and drug transport proteins. These changes, in addition to antioxidant protein induction previously observed, may represent cytoprotective mechanisms underlying T₃ preconditioning against liver injury mediated by ROS and chemical toxicity.
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Affiliation(s)
- Pamela Cornejo
- Faculty of Medicine, Diego Portales University, Santiago, Chile
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12
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Li Z, Tighe RM, Feng F, Ledford JG, Hollingsworth JW. Genes of innate immunity and the biological response to inhaled ozone. J Biochem Mol Toxicol 2012; 27:3-16. [PMID: 23169704 DOI: 10.1002/jbt.21453] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 09/28/2012] [Accepted: 10/07/2012] [Indexed: 12/31/2022]
Abstract
Ambient ozone has a significant impact on human health. We have made considerable progress in understanding the fundamental mechanisms that regulate the biological response to ozone. It is increasingly clear that genes of innate immunity play a central role in both infectious and noninfectious lung disease. The biological response to ambient ozone provides a clinically relevant environmental exposure that allows us to better understand the role of innate immunity in noninfectious airways disease. In this brief review, we focus on (1) specific cell types in the lung modified by ozone, (2) ozone and oxidative stress, (3) the relationship between genes of innate immunity and ozone, (4) the role of extracellular matrix in reactive airways disease, and (5) the effect of ozone on the adaptive immune system. We summarize recent advances in understanding the mechanisms that ozone contributes to environmental airways disease.
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Affiliation(s)
- Zhuowei Li
- Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA
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13
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Brass DM, Spencer JC, Li Z, Potts-Kant E, Reilly SM, Dunkel MK, Latoche JD, Auten RL, Hollingsworth JW, Fattman CL. Innate immune activation by inhaled lipopolysaccharide, independent of oxidative stress, exacerbates silica-induced pulmonary fibrosis in mice. PLoS One 2012; 7:e40789. [PMID: 22815821 PMCID: PMC3397936 DOI: 10.1371/journal.pone.0040789] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 06/13/2012] [Indexed: 12/03/2022] Open
Abstract
Acute exacerbations of pulmonary fibrosis are characterized by rapid decrements in lung function. Environmental factors that may contribute to acute exacerbations remain poorly understood. We have previously demonstrated that exposure to inhaled lipopolysaccharide (LPS) induces expression of genes associated with fibrosis. To address whether exposure to LPS could exacerbate fibrosis, we exposed male C57BL/6 mice to crystalline silica, or vehicle, followed 28 days later by LPS or saline inhalation. We observed that mice receiving both silica and LPS had significantly more total inflammatory cells, more whole lung lavage MCP-1, MIP-2, KC and IL-1β, more evidence of oxidative stress and more total lung hydroxyproline than mice receiving either LPS alone, or silica alone. Blocking oxidative stress with N-acetylcysteine attenuated whole lung inflammation but had no effect on total lung hydroxyproline. These observations suggest that exposure to innate immune stimuli, such as LPS in the environment, may exacerbate stable pulmonary fibrosis via mechanisms that are independent of inflammation and oxidative stress.
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Affiliation(s)
- David M Brass
- Neonatology Division, Department of Pediatrics, Neonatal Perinatal Research Institute, Duke University Medical Center, Durham, North Carolina, United States of America.
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