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Smith JT, Noren Hooten N, Mode NA, Zonderman AB, Ezike N, Kaushal S, Evans MK. Frailty, sex, and poverty are associated with DNA damage and repair in frail, middle-aged urban adults. DNA Repair (Amst) 2023; 129:103530. [PMID: 37437502 PMCID: PMC10807508 DOI: 10.1016/j.dnarep.2023.103530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 04/17/2023] [Accepted: 06/27/2023] [Indexed: 07/14/2023]
Abstract
Frailty is an age-related syndrome characterized by reduced recovery from stressors and increased risks of morbidity and mortality. Although frailty is usually studied in those over 65 years, our previous work showed that frailty is both present and a risk factor for premature mortality in midlife. We identified altered gene expression patterns and biological pathways associated with inflammation in frailty. Evidence suggests DNA oxidation damage related to inflammation accumulates with age, and that DNA repair capacity (DRC) declines with age and age-related conditions. We hypothesized that inter-individual differences in DNA oxidation damage and DRC are associated with frailty status and poverty level. Using the CometChip assay, we assessed baseline single-strand breaks and hydrogen peroxide (H2O2)-induced DNA oxidation damage and DRC in non-frail and frail middle-aged African American and White individuals with household incomes above and below poverty. Analysis of baseline single-strand breaks showed no associations with frailty, poverty, race, or sex. However, we identified an interaction between frailty and poverty in H2O2-induced DNA oxidation damage. We also identified interactions between sex and frailty as well as sex and poverty status with DRC. The social determinant of health, poverty, associates with DRC in men. Baseline DNA damage, H2O2-induced DNA damage as well as DRC were associated with serum cytokine levels. IL-10 levels were inversely associated with baseline DNA damage as well as H2O2-induced DNA damage, DRC was altered by IL-4 levels and sex, and by TNF-α levels in the context of sex and poverty status. This is the first evidence that DRC may be influenced by poverty status at midlife. Our data show that social determinants of health should be considered in examining biological pathways through which disparate age-related health outcomes become manifest.
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Affiliation(s)
- Jessica T Smith
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States
| | - Nicole Noren Hooten
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States
| | - Nicolle A Mode
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States
| | - Alan B Zonderman
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States
| | - Ngozi Ezike
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States
| | - Simran Kaushal
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Michele K Evans
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, United States.
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Fernández-Bertólez N, Lema-Arranz C, Fraga S, Teixeira JP, Pásaro E, Lorenzo-López L, Valdiglesias V, Laffon B. Suitability of salivary leucocytes to assess DNA repair ability in human biomonitoring studies by the challenge-comet assay. CHEMOSPHERE 2022; 307:136139. [PMID: 36007734 DOI: 10.1016/j.chemosphere.2022.136139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/03/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
The challenge-comet assay is a simple but effective approach that provides a quantitative and functional determination of DNA repair ability, and allows to monitor the kinetics of repair process. Peripheral blood mononuclear cells (PBMC) are the cells most frequently employed in human biomonitoring studies using the challenge-comet assay, but having a validated alternative of non-invasive biomatrix would be highly convenient for certain population groups and circumstances. The objective of this study was to validate the use of salivary leucocytes in the challenge-comet assay. Leucocytes were isolated from saliva samples and challenged (either in fresh or after cryopreservation) with three genotoxic agents acting by different action mechanisms: bleomycin, methyl methanesulfonate, and ultraviolet radiation. Comet assay was performed just after treatment and at other three additional time points, in order to study repair kinetics. The results obtained demonstrated that saliva leucocytes were as suitable as PBMC for assessing DNA damage of different nature that was efficiently repaired over the evaluated time points, even after 5 months of cryopreservation (after a 24 h stimulation with PHA). Furthermore, a new parameter to determine the efficacy of the repair process, independent of the initial amount of damage induced, is proposed, and recommendations to perform the challenge-comet assay with salivary leucocytes depending on the type of DNA repair to be assessed are suggested. Validation studies are needed to verify whether the method is reproducible and results reliable and comparable among laboratories and studies.
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Affiliation(s)
- Natalia Fernández-Bertólez
- Universidade da Coruña, Grupo NanoToxGen, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Biología, Facultad de Ciencias, Campus A Zapateira s/n, 15071, A Coruña, Spain; Instituto de Investigación Biomédica de A Coruna (INIBIC), Oza, 15071, A Coruna, Spain
| | - Carlota Lema-Arranz
- Universidade da Coruña, Grupo NanoToxGen, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Biología, Facultad de Ciencias, Campus A Zapateira s/n, 15071, A Coruña, Spain; Instituto de Investigación Biomédica de A Coruna (INIBIC), Oza, 15071, A Coruna, Spain; Universidade da Coruña, Grupo DICOMOSA, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Psicología, Facultad de Ciencias de la Educación, Campus Elviña s/n, 15071, A Coruña, Spain
| | - Sónia Fraga
- Department of Environmental Health, Portuguese National Institute of Health, Rua Alexandre Herculano, 321, 4000-055, Porto, Portugal; EPIUnit-Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, nº 135, 4050-600, Porto, Portugal; Laboratório para a Investigação Integrativa e Translacional em Saúde Populacional (ITR), Porto, Portugal
| | - João Paulo Teixeira
- Department of Environmental Health, Portuguese National Institute of Health, Rua Alexandre Herculano, 321, 4000-055, Porto, Portugal; EPIUnit-Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, nº 135, 4050-600, Porto, Portugal; Laboratório para a Investigação Integrativa e Translacional em Saúde Populacional (ITR), Porto, Portugal
| | - Eduardo Pásaro
- Instituto de Investigación Biomédica de A Coruna (INIBIC), Oza, 15071, A Coruna, Spain; Universidade da Coruña, Grupo DICOMOSA, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Psicología, Facultad de Ciencias de la Educación, Campus Elviña s/n, 15071, A Coruña, Spain
| | - Laura Lorenzo-López
- Universidade da Coruña, Gerontology and Geriatrics Research Group, Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Servizo Galego de Saúde (SERGAS), A Coruña, Spain
| | - Vanessa Valdiglesias
- Universidade da Coruña, Grupo NanoToxGen, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Biología, Facultad de Ciencias, Campus A Zapateira s/n, 15071, A Coruña, Spain; Instituto de Investigación Biomédica de A Coruna (INIBIC), Oza, 15071, A Coruna, Spain.
| | - Blanca Laffon
- Instituto de Investigación Biomédica de A Coruna (INIBIC), Oza, 15071, A Coruna, Spain; Universidade da Coruña, Grupo DICOMOSA, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Psicología, Facultad de Ciencias de la Educación, Campus Elviña s/n, 15071, A Coruña, Spain
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3
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Møller P, Bankoglu EE, Stopper H, Giovannelli L, Ladeira C, Koppen G, Gajski G, Collins A, Valdiglesias V, Laffon B, Boutet-Robinet E, Perdry H, Del Bo' C, Langie SAS, Dusinska M, Azqueta A. Collection and storage of human white blood cells for analysis of DNA damage and repair activity using the comet assay in molecular epidemiology studies. Mutagenesis 2021; 36:193-212. [PMID: 33755160 DOI: 10.1093/mutage/geab012] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 03/22/2021] [Indexed: 01/08/2023] Open
Abstract
DNA damage and repair activity are often assessed in blood samples from humans in different types of molecular epidemiology studies. However, it is not always feasible to analyse the samples on the day of collection without any type of storage. For instance, certain studies use repeated sampling of cells from the same subject or samples from different subjects collected at different time-points, and it is desirable to analyse all these samples in the same comet assay experiment. In addition, flawless comet assay analyses on frozen samples open up the possibility of using this technique on biobank material. In this article we discuss the use of cryopreserved peripheral blood mononuclear cells (PBMCs), buffy coat (BC) and whole blood (WB) for analysis of DNA damage and repair using the comet assay. The published literature and the authors' experiences indicate that various types of blood samples can be cryopreserved with only a minor effect on the basal level of DNA damage. There is evidence to suggest that WB and PBMCs can be cryopreserved for several years without much effect on the level of DNA damage. However, care should be taken when cryopreserving WB and BCs. It is possible to use either fresh or frozen samples of blood cells, but results from fresh and frozen cells should not be used in the same dataset. The article outlines detailed protocols for the cryopreservation of PBMCs, BCs and WB samples.
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Affiliation(s)
- Peter Møller
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014 Copenhagen K, Denmark
| | - Ezgi Eyluel Bankoglu
- Institute of Pharmacology and Toxicology, University of Wuerzburg, Versbacher Str. 9, 97078 Wuerzburg, Germany
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Wuerzburg, Versbacher Str. 9, 97078 Wuerzburg, Germany
| | - Lisa Giovannelli
- Department NEUROFARBA, University of Florence, Viale G. Pieraccini 6, 50139 Florence, Italy
| | - Carina Ladeira
- H&TRC - Health & Technology Research Center, Escola Superior de Tecnologia da Saúde (ESTeSL), Instituto Politécnico de Lisboa, Avenida D. João II, lote 4.69.01, Parque das Nações, 1990-096 Lisboa, Portugal.,NOVA National School of Public Health, Public Health Research Centre, Universidade NOVA de Lisboa, Lisbon, Portugal.,Comprehensive Health Research Center (CHRC), Universidade NOVA de Lisboa, Portugal
| | | | - Goran Gajski
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000 Zagreb, Croatia
| | - Andrew Collins
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Sognsvannsveien 9, 0372 Oslo, Norway
| | - Vanessa Valdiglesias
- Grupo DICOMOSA, Centro de Investigaciones Científicas Avanzadas (CICA), Departamento de Biología, Facultad de Ciencias, Universidade da Coruña, Campus A Zapateira s/n, 15071, A Coruña, Spain.,Instituto de Investigación Biomédica de A Coruña (INIBIC), AE CICA-INIBIC, Oza, 15071 A Coruña, Spain
| | - Blanca Laffon
- Instituto de Investigación Biomédica de A Coruña (INIBIC), AE CICA-INIBIC, Oza, 15071 A Coruña, Spain.,Grupo DICOMOSA, Centro de Investigaciones Científicas Avanzadas (CICA), Departamento de Psicología, Facultad de Ciencias de la Educación, Universidade da Coruña, Campus Elviña s/n, 15071, A Coruña, Spain
| | - Elisa Boutet-Robinet
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Hervé Perdry
- Université Paris-Saclay, UVSQ, Inserm, CESP, 94807, Villejuif, France
| | - Cristian Del Bo'
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via Celoria 2, 20133, Milan, Italy
| | - Sabine A S Langie
- School of Nutrition and Translational Research in Metabolism, Department of Pharmacology and Toxicology, University of Maastricht, Universiteitssingel 50, 6200 MD, Maastricht, The Netherlands
| | - Maria Dusinska
- Environmental Chemistry Department, Health Effects Laboratory, NILU - Norwegian Institute for Air Research, 2027 Kjeller, Norway
| | - Amaya Azqueta
- Department of Pharmacology and Toxicology, University of Navarra, C/Irunlarrea 1, 31008 Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, C/Irunlarrea 3, 31008 Pamplona, Spain
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Application of the comet assay in human biomonitoring: An hCOMET perspective. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2019; 783:108288. [PMID: 32192646 DOI: 10.1016/j.mrrev.2019.108288] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 10/29/2019] [Accepted: 11/07/2019] [Indexed: 12/29/2022]
Abstract
The comet assay is a well-accepted biomonitoring tool to examine the effect of dietary, lifestyle, environmental and occupational exposure on levels of DNA damage in human cells. With such a wide range of determinants for DNA damage levels, it becomes challenging to deal with confounding and certain factors are inter-related (e.g. poor nutritional intake may correlate with smoking status). This review describes the effect of intrinsic (i.e. sex, age, tobacco smoking, occupational exposure and obesity) and extrinsic (season, environmental exposures, diet, physical activity and alcohol consumption) factors on the level of DNA damage measured by the standard or enzyme-modified comet assay. Although each factor influences at least one comet assay endpoint, the collective evidence does not indicate single factors have a large impact. Thus, controlling for confounding may be necessary in a biomonitoring study, but none of the factors is strong enough to be regarded a priori as a confounder. Controlling for confounding in the comet assay requires a case-by-case approach. Inter-laboratory variation in levels of DNA damage and to some extent also reproducibility in biomonitoring studies are issues that have haunted the users of the comet assay for years. Procedures to collect specimens, and their storage, are not standardized. Likewise, statistical issues related to both sample-size calculation (before sampling of specimens) and statistical analysis of the results vary between studies. This review gives guidance to statistical analysis of the typically complex exposure, co-variate, and effect relationships in human biomonitoring studies.
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Koppen G, De Prins S, Jacobs A, Nelen V, Schoeters G, Langie SAS. The comet assay in human biomonitoring: cryopreservation of whole blood and comparison with isolated mononuclear cells. Mutagenesis 2017; 33:41-47. [DOI: 10.1093/mutage/gex034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Gudrun Koppen
- Health Unit, Flemish Institute for Technological Research (VITO), Belgium
| | - Sofie De Prins
- Health Unit, Flemish Institute for Technological Research (VITO), Belgium
- VITO - Sustainable Health, Belgium
| | - An Jacobs
- Health Unit, Flemish Institute for Technological Research (VITO), Belgium
| | - Vera Nelen
- Environment and Health Unit, Provincial Institute of Hygiene, Belgium
| | - Greet Schoeters
- Health Unit, Flemish Institute for Technological Research (VITO), Belgium
- VITO - Sustainable Health, Belgium
- Department of Environmental Medicine, Institute of Public Health, University of Southern Denmark, Denmark
| | - Sabine A S Langie
- Health Unit, Flemish Institute for Technological Research (VITO), Belgium
- Faculty of Sciences, Hasselt University, Belgium
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Engel LS, Kwok RK, Miller AK, Blair A, Curry MD, McGrath JA, Sandler DP, Baker S, Cohn RD, Gaunt EE, Hodges A, Johndrow D, Ramsey SK, Stenzel M, Stewart P. The Gulf Long-Term Follow-Up Study (GuLF STUDY): Biospecimen collection at enrollment. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:218-229. [PMID: 28418274 PMCID: PMC5522735 DOI: 10.1080/15287394.2017.1283274] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The 2010 Deepwater Horizon (DWH) explosion in the Gulf of Mexico led to the largest ever marine oil spill by volume. The GuLF STUDY is investigating possible adverse human health effects associated with oil spill activities. One objective of the study was to utilize biological specimens from study participants to examine spill-related adverse health effects. This study describes the methods for collecting, processing, shipping, and storing specimens during the enrollment phase of the study. GuLF STUDY participants living in Gulf States (Alabama, Florida, Louisiana, Mississippi, and eastern Texas) were eligible to complete a home visit at enrollment, one to three years after the DWH explosion. During this visit, blood, urine, toenail and hair clippings, and house dust samples were collected. Specimens were shipped overnight to a central processing laboratory in containers with cold and ambient temperature compartments. Most blood and urine specimens were then aliquoted and stored in liquid nitrogen vapor or at -80°C, with some samples stored at -20°C. A total of 11,193 participants completed a home visit, and over 99% provided at least one biospecimen. Most participants provided blood (93%), urine (99%), and toenail clippings (89%), and 40% provided hair. Nearly all participants (95%) provided house-dust samples. Most samples were received by the laboratory one (58%) or two (25%) days after collection. These biospecimens enable investigation of a range of biomarkers of spill-related adverse health effects, and possibly some biomarkers of spill-related exposures. The biospecimen collection, handling, and storage protocols were designed to maximize current and future scientific value within logistical and budgetary constraints and might serve as a template for future studies conducted in similar time-critical and geographically dispersed settings.
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Affiliation(s)
- Lawrence S. Engel
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Richard K. Kwok
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Aubrey K. Miller
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Aaron Blair
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
| | | | - John A. McGrath
- Social & Scientific Systems, Inc., Durham, North Carolina, USA
| | - Dale P. Sandler
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | | | - Susan Baker
- Social & Scientific Systems, Inc., Durham, North Carolina, USA
| | - Richard D. Cohn
- Social & Scientific Systems, Inc., Durham, North Carolina, USA
| | - Edward E. Gaunt
- Social & Scientific Systems, Inc., Durham, North Carolina, USA
| | - Audra Hodges
- Social & Scientific Systems, Inc., Durham, North Carolina, USA
| | - David Johndrow
- Social & Scientific Systems, Inc., Durham, North Carolina, USA
| | | | - Mark Stenzel
- Exposure Assessment Applications LLC, Arlington, Virginia, USA
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Increased micronucleus frequency in peripheral blood lymphocytes predicts the risk of bladder cancer. Br J Cancer 2016; 116:202-210. [PMID: 27959887 PMCID: PMC5243995 DOI: 10.1038/bjc.2016.411] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 10/24/2016] [Accepted: 11/09/2016] [Indexed: 11/08/2022] Open
Abstract
Background: Bladder cancer (BC) is among the most common malignancies worldwide. The identification of new biomarkers for early BC detection, recurrence/progression is urgently needed. The cytokinesis-block micronucleus assay (CBMN) evaluates chromosome damage in cultured human lymphocytes and micronuclei (MN) provide a convenient and reliable index of both chromosome breakage and loss. Methods: Chromosomal damage (expressed as frequencies of MN, nucleoplasmic bridges and nuclear buds (NBUD)) was evaluated by CBMN assay in cryopreserved lymphocytes from 158 age/smoking-matched pairs of cases and controls in relation to BC risk, recurrence or progression. Moreover, non-muscle invasive BC (NMIBC) patients were characterised for 783 DNA repair gene polymorphisms for their possible association with the investigated cytogenetic end points. Results: MN and NBUD frequencies were significantly higher in cases than in controls (P=0.001 and P=0.006, respectively), with the associations being stronger in NMIBC. In a logistic regression model, for each increase of one unit in the MN frequency, a 1.12 increased risk of developing NMIBC was observed. In NMIBC cases, 10 polymorphisms were associated with different MN frequencies after genotype stratification. Conclusions: A model including traditional BC risk factors, MN frequency and the selected polymorphisms differentially distributed in cases and controls improved BC patient identification. Understanding the meaning of systemic chromosomal damage in BC patients with respect to the general population may help to adopt specific prevention strategies and therapeutic intervention.
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Habermann N, Makar KW, Abbenhardt C, Xiao L, Wang CY, Utsugi HK, Alfano CM, Campbell KL, Duggan C, Foster-Schubert KE, Mason CE, Imayama I, Blackburn GL, Potter JD, McTiernan A, Ulrich CM. No effect of caloric restriction or exercise on radiation repair capacity. Med Sci Sports Exerc 2016; 47:896-904. [PMID: 25160845 DOI: 10.1249/mss.0000000000000480] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Maintenance of normal weight and higher levels of physical activity are associated with a reduced risk of several types of cancer. Because genomic instability is regarded as a hallmark of cancer development, one proposed mechanism is improvement of DNA repair function. We investigated links between dietary weight loss, exercise, and strand break rejoining in an ancillary study to a randomized-controlled trial. METHODS Overweight/obese postmenopausal women (n = 439) were randomized to the following: a) reduced calorie weight loss diet ("diet," n = 118), b) moderate- to vigorous-intensity aerobic exercise ("exercise," n = 117), c) a combination ("diet + exercise," n = 117), or d) control (n = 87). The reduced calorie diet had a 10% weight loss goal. The exercise intervention consisted of 45 min of moderate to vigorous aerobic activity 5 d·wk for 12 months. DNA repair capacity was measured in a subset of 226 women at baseline and 12 months from cryopreserved peripheral mononuclear cells using the comet assay. Anthropometric and body composition measures were performed at baseline and 12 months. RESULTS DNA repair capacity did not change significantly with any of the 12-month interventions compared with control; there were also no significant changes when stratified by changes in body composition or aerobic fitness (V˙O2max). At baseline, DNA repair capacity was positively associated with weight, body mass index, and fat mass (r = 0.20, P = 0.003; r = 0.19, P = 0.004; r = 0.13, P = 0.04, respectively) and inversely with lean body mass (r = -0.14, P = 0.04). CONCLUSION In conclusion, DNA repair capacity in cryopreserved PBMCs (Comet Assay) did not change with dietary weight loss or exercise interventions in postmenopausal women within a period of 12 months. Other assays that capture different facets of DNA repair function may be needed.
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Affiliation(s)
- Nina Habermann
- 1Division of Preventive Oncology, German Cancer Research Center and National Center for Tumor Diseases, Heidelberg, GERMANY; 2Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA; 3Office of Cancer Survivorship, National Cancer Institute/National Institutes of Health, Bethesda, MD; 4Faculty of Medicine, University of British Columbia, Vancouver, BC, CANADA; 5School of Medicine, University of Washington, Seattle, WA; 6Division of Nutrition, Harvard Medical School, Boston, MA; 7Cancer Prevention Program, Fred Hutchinson Cancer Research Center, Seattle, WA; 8School of Public Health, University of Washington, Seattle, WA; and 9Center for Public Health Research, Massey University, Wellington, NEW ZEALAND
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9
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Kantor ED, Ulrich CM, Owen RW, Schmezer P, Neuhouser ML, Lampe JW, Peters U, Shen DD, Vaughan TL, White E. Specialty supplement use and biologic measures of oxidative stress and DNA damage. Cancer Epidemiol Biomarkers Prev 2013; 22:2312-22. [PMID: 23917455 DOI: 10.1158/1055-9965.epi-13-0470] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Oxidative stress and resulting cellular damage have been suggested to play a role in the etiology of several chronic diseases, including cancer and cardiovascular disease. Identifying factors associated with reduced oxidative stress and resulting damage may guide future disease-prevention strategies. METHODS In the VITamins And Lifestyle (VITAL) biomarker study of 209 persons living in the Seattle area, we examined the association between current use of several specialty supplements and oxidative stress, DNA damage, and DNA repair capacity. Use of glucosamine, chondroitin, fish oil, methylsulfonylmethane (MSM), coenzyme Q10 (CoQ10), ginseng, ginkgo, and saw palmetto was ascertained by a supplement inventory/interview, whereas the use of fiber supplements was ascertained by questionnaire. Supplements used by more than 30 persons (glucosamine and chondroitin) were evaluated as the trend across number of pills/week (non-use, <14 pills/week, 14+ pills/week), whereas less commonly used supplements were evaluated as use/non-use. Oxidative stress was measured by urinary 8-isoprostane and PGF2α concentrations using enzyme immunoassays (EIA), whereas lymphocyte DNA damage and DNA repair capacity were measured using the Comet assay. Multivariate-adjusted linear regression was used to model the associations between supplement use and oxidative stress/DNA damage. RESULTS Use of glucosamine (Ptrend: 0.01), chondroitin (Ptrend: 0.003), and fiber supplements (P: 0.01) was associated with reduced PGF2α concentrations, whereas CoQ10 supplementation was associated with reduced baseline DNA damage (P: 0.003). CONCLUSIONS Use of certain specialty supplements may be associated with reduced oxidative stress and DNA damage. IMPACT Further research is needed to evaluate the association between specialty supplement use and markers of oxidative stress and DNA damage.
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Affiliation(s)
- Elizabeth D Kantor
- Authors' Affiliations: Public Health Sciences Division, Clinical Research Division, Fred Hutchinson Cancer Research Center; Departments of Epidemiology, Pharmacy, and Pharmaceutics, University of Washington, Seattle, Washington; Division of Preventive Oncology, National Center for Tumor Diseases; Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center, Heidelberg, Germany
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10
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Decordier I, Loock KV, Kirsch-Volders M. Phenotyping for DNA repair capacity. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2010; 705:107-129. [PMID: 20478396 DOI: 10.1016/j.mrrev.2010.05.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2009] [Revised: 05/10/2010] [Accepted: 05/10/2010] [Indexed: 12/21/2022]
Affiliation(s)
- Ilse Decordier
- Laboratorium voor Cellulaire Genetica, Vrije Universiteit Brussel, Belgium.
| | - Kim Vande Loock
- Laboratorium voor Cellulaire Genetica, Vrije Universiteit Brussel, Belgium
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Chang JL, Chen G, Ulrich CM, Bigler J, King IB, Schwarz Y, Li S, Li L, Potter JD, Lampe JW. DNA damage and repair: fruit and vegetable effects in a feeding trial. Nutr Cancer 2010; 62:329-35. [PMID: 20358470 DOI: 10.1080/01635580903407106] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Epidemiologic studies have examined the association between fruit and vegetable (F&V) consumption and the risk of cancer. Several cancer-preventive mechanisms have been proposed, such as antioxidant properties and modulation of biotransformation enzyme activities; both may be associated with reducing DNA damage and hence the mutation rate. We investigated, in a randomized, controlled, crossover feeding trial, the effect of 10 servings/day of botanically defined F&V for 2 wk on endogenous DNA damage; resistance to gamma -irradiation damage; and DNA repair capacity in lymphocytes, measured by the Comet assay. We also explored the association between the UGT1A1*28 polymorphism and serum bilirubin concentrations and DNA damage and repair measures. Healthy men (n = 11) and women (n = 17), age 20 to 40 yr, provided blood samples at the end of each feeding period. Overall, F&V did not affect DNA damage and repair measures in lymphocytes. The number of UGT1A1*28 alleles was inversely associated with sensitivity to gamma -irradiation exposure and DNA repair capacity, but a biological mechanism to explain this association is unclear. A larger sample size is needed to investigate the association between bilirubin concentrations and endogenous DNA damage. With inconsistent findings in the literature, additional dietary intervention studies on the effect of F&V on DNA damage and repair are needed.
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Li C, Wang LE, Wei Q. DNA repair phenotype and cancer susceptibility--a mini review. Int J Cancer 2009; 124:999-1007. [PMID: 19065660 DOI: 10.1002/ijc.24126] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
DNA repair is a complicated biological process, consisting of several distinct pathways, that plays a fundamental role in the maintenance of genomic integrity. The very important field of DNA repair and cancer risk has developed rapidly in the past decades. In this review of selected published data from our laboratory, we describe mostly our work on the study of phenotypic markers of nucleotide excision repair (NER), as measured by the benzo(a)pyrene diol epoxide (BPDE)/ultraviolet (UV)-induced mutagen sensitivity assays, BPDE-induced adduct assay, host cell reactivation (HCR)-DNA repair capacity (DRC) assay, reverse transcription-polymerase chain reaction (RT-PCR) assay and reverse-phase protein lysate microarray (RPP) assay, by using peripheral blood lymphocytes in a series of molecular epidemiological studies. Results of our studies suggest that individuals with reduced DRC have an elevated cancer risk. This finding needs additional validation by other investigators, and we also discussed issues in conducting this kind of research in the future.
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Affiliation(s)
- Chunying Li
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
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Trzeciak AR, Barnes J, Evans MK. A modified alkaline comet assay for measuring DNA repair capacity in human populations. Radiat Res 2008; 169:110-21. [PMID: 18159959 DOI: 10.1667/rr1101.1] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2007] [Accepted: 09/06/2007] [Indexed: 12/25/2022]
Abstract
Trzeciak, A. R., Barnes, J. and Evans, M. K. A Modified Alkaline Comet Assay for Measuring DNA Repair Capacity in Human Populations. Radiat. Res. 169, 110-121 (2008). Use of the alkaline comet assay to assess DNA repair capacity in human populations has been limited by several factors, including lack of methodology for use of unstimulated cryopreserved peripheral blood mononuclear cells (PBMCs), insufficient control of interexperimental variability, and limited analysis of DNA repair kinetics. We show that unstimulated cryopreserved PBMCs can be used in DNA repair studies performed using the comet assay. We have applied data standardization for the analysis of DNA repair capacity using negative and positive internal standards as controls for interexperimental variability. Our standardization procedure also uses negative controls, which provides a way to minimize the interference of interindividual variation in baseline DNA damage levels on DNA repair capacity measurements in populations. DNA repair capacity was assessed in a small human cohort using the parameters described in the literature including initial DNA damage, half-time of DNA repair, and residual DNA damage after 30 and 60 min. We have also introduced new DNA repair capacity parameter, initial rate of DNA repair. There was no difference in DNA repair capacity between fresh and cryopreserved PBMCs when measured by the Olive tail moment and tail DNA. The use of DNA repair capacity parameters in assessment of fast and slow single-strand break repair components is discussed.
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Affiliation(s)
- Andrzej R Trzeciak
- Laboratory of Cellular and Molecular Biology, and National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224-6825, USA
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