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Hodge JM, Coghill AE, Kim Y, Bender N, Smith-Warner SA, Gapstur S, Teras LR, Grimsrud TK, Waterboer T, Egan KM. Toxoplasma gondii infection and the risk of adult glioma in two prospective studies. Int J Cancer 2021; 148:2449-2456. [PMID: 33427315 DOI: 10.1002/ijc.33443] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 11/12/2020] [Accepted: 12/03/2020] [Indexed: 12/24/2022]
Abstract
Toxoplasma gondii (T gondii) is a common parasite that shows affinity to neural tissue and may lead to the formation of cysts in the brain. Previous epidemiologic studies have suggested an association between glioma and increased prevalence of T gondii infection, but prospective studies are lacking. Therefore, we examined the association between prediagnostic T gondii antibodies and risk of glioma in two prospective cohorts using a nested case-control study design. Cases and matched controls were selected from the American Cancer Society's Cancer Prevention Study-II Nutrition Cohort (CPSII-NC) (n = 37 cases and 74 controls) and the Norwegian Cancer Registry's Janus Serum Bank (Janus) (n = 323 cases and 323 controls). Blood samples collected prior to diagnosis were analyzed for antibodies to two T gondii surface antigens (p22 and sag-1), with individuals considered seropositive if antibodies to either antigen were detected. Conditional logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (95% CI) for each cohort. In both cohorts, a suggestive increase in glioma risk was observed among those infected with T gondii (OR: 2.70; 95% CI: 0.96-7.62 for CPSII-NC; OR: 1.32, 95% CI: 0.85-2.07 for Janus), particularly among participants with high antibody titers specific to the sag-1 antigen (CPSII-NC OR: 3.35, 95% CI: 0.99-11.38; Janus OR: 1.79, 95% CI: 1.02-3.14). Our findings provide the first prospective evidence of an association between T gondii infection and risk of glioma. Further studies with larger case numbers are needed to confirm a potential etiologic role for T gondii in glioma.
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Affiliation(s)
- James M Hodge
- Department of Population Science, American Cancer Society, Atlanta, Georgia, USA
| | - Anna E Coghill
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, USA
| | - Youngchul Kim
- Department of Biostatistics, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, USA
| | - Noemi Bender
- Infections and Cancer Epidemiology, German Cancer Research Center (Deutsches Krebsforschungszentrum, DKFZ), Heidelberg, Germany
| | - Stephanie A Smith-Warner
- Department of Nutrition and Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Susan Gapstur
- Department of Population Science, American Cancer Society, Atlanta, Georgia, USA
| | - Lauren R Teras
- Department of Population Science, American Cancer Society, Atlanta, Georgia, USA
| | - Tom K Grimsrud
- Department of Research, Cancer Registry of Norway, Oslo, Norway
| | - Tim Waterboer
- Infections and Cancer Epidemiology, German Cancer Research Center (Deutsches Krebsforschungszentrum, DKFZ), Heidelberg, Germany
| | - Kathleen M Egan
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, USA
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2
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Karalexi MA, Dessypris N, Georgakis MK, Ryzhov A, Jakab Z, Zborovskaya A, Dimitrova N, Zivkovic S, Trojanowski M, Sekerija M, Antunes L, Zagar T, Eser S, Bastos J, Demetriou A, Agius D, Coza D, Gheorghiu R, Kantzanou M, Ntzani EE, Petridou ET. Birth seasonality of childhood central nervous system tumors: Analysis of primary data from 16 Southern-Eastern European population-based registries. Int J Cancer 2020; 147:1252-1263. [PMID: 31957026 DOI: 10.1002/ijc.32875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 12/01/2019] [Accepted: 12/03/2019] [Indexed: 12/19/2022]
Abstract
Season of birth, a surrogate of seasonal variation of environmental exposures, has been associated with increased risk of several cancers. In the context of a Southern-Eastern Europe (SEE) consortium, we explored the potential association of birth seasonality with childhood (0-14 years) central nervous system (CNS) tumors. Primary CNS tumor cases (n = 6,014) were retrieved from 16 population-based SEE registries (1983-2015). Poisson regression and meta-analyses on birth season were performed in nine countries with available live birth data (n = 4,987). Subanalyses by birth month, age, gender and principal histology were also conducted. Children born during winter were at a slightly increased risk of developing a CNS tumor overall [incidence rate ratio (IRR): 1.06, 95% confidence intervals (CI): 0.99-1.14], and of embryonal histology specifically (IRR: 1.13, 95% CI: 1.01-1.27). The winter peak of embryonal tumors was higher among boys (IRR: 1.24, 95% CI: 1.05-1.46), especially during the first 4 years of life (IRR: 1.33, 95% CI: 1.03-1.71). In contrast, boys <5 years born during summer seemed to be at a lower risk of embryonal tumors (IRR: 0.73, 95% CI: 0.54-0.99). A clustering of astrocytomas was also found among girls (0-14 years) born during spring (IRR: 1.23, 95% CI: 1.03-1.46). Although the present exploratory results are by no means definitive, they provide some indications for age-, gender- and histology-related seasonal variations of CNS tumors. Expansion of registration and linkage with cytogenetic reports could refine if birth seasonality is causally associated with CNS tumors and shed light into the complex pathophysiology of this lethal disease.
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Affiliation(s)
- Maria A Karalexi
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nick Dessypris
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Marios K Georgakis
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Anton Ryzhov
- National Cancer Registry of Ukraine, National Cancer Institute & Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Zsuzsanna Jakab
- OGYR, Hun Childhood Cancer Registry, Semmelweis University, Budapest, Hungary
| | - Anna Zborovskaya
- Belarusian Research Center for Pediatric Oncology, Hematology and Immunology, Childhood Cancer Sub-registry of Belarus, Minsk, Belarus
| | - Nadya Dimitrova
- Bulgarian National Cancer Registry, National Oncology Hospital, Sofia, Bulgaria
| | - Snezana Zivkovic
- Central Serbia Cancer Registry, Institute of Public Health of Serbia, Belgrade, Serbia
| | - Maciej Trojanowski
- Greater Poland Cancer Registry, Greater Poland Cancer Center, Poznan, Poland
| | - Mario Sekerija
- Andrija Štampar School of Public Health, School of Medicine, University of Zagreb, Zagreb, Croatia.,Croatian National Cancer Registry, Croatian Institute of Public Health, Zagreb, Croatia
| | - Luis Antunes
- North Region Cancer Registry of Portugal (RORENO), Portuguese Oncology Institute of Porto, Porto, Portugal
| | - Tina Zagar
- Cancer Registry of Slovenia, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Sultan Eser
- Izmir Cancer Registry, Izmir Hub, Izmir & Hacettepe University Institute of Public Health, Ankara, Turkey
| | - Joana Bastos
- Registo Oncológico Regional do Centro (ROR-Centro), Instituto Português de Oncologia de Coimbra Francisco Gentil, E.P.E., Coimbra, Portugal
| | - Anna Demetriou
- Health Monitoring Unit, Ministry of Health, Nicosia, Cyprus
| | - Domenic Agius
- Department for Policy in Health Information and Research, Malta National Cancer Registry, Pieta, Malta
| | - Daniela Coza
- Cluj Regional Cancer Registry, The Oncology Institute "Prof. Dr. Ion Chiricuţă", Cluj-Napoca, Romania
| | - Raluca Gheorghiu
- Regional Cancer Registry, National Institute of Public Health, Iasi, Romania
| | | | - Maria Kantzanou
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Evangelia E Ntzani
- Department of Hygiene and Epidemiology, School of Medicine, University of Ioannina, Ioannina, Greece.,Center for Evidence Synthesis in Health, Brown University School of Public Health, Providence, RI
| | - Eleni Th Petridou
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece.,Clinical Epidemiology Unit, Department of Medicine, Karolinska Institute, Stockholm, Sweden
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Creed JH, Peeri NC, Anic GM, Thompson RC, Olson JJ, LaRocca RV, Chowdhary SA, Brockman JD, Gerke TA, Nabors LB, Egan KM. Methylmercury exposure, genetic variation in metabolic enzymes, and the risk of glioma. Sci Rep 2019; 9:10861. [PMID: 31350461 PMCID: PMC6659774 DOI: 10.1038/s41598-019-47284-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 07/15/2019] [Indexed: 12/25/2022] Open
Abstract
Methylmercury (MeHg) is an environmental neurotoxin with human exposure mainly from dietary intake of contaminated fish. Exposure to MeHg has been implicated in neurological damage, but research on its role in cancers, specifically glioma, is limited. In a glioma case-control study, we examined associations between toenail mercury (Hg) and glioma risk. We also examined genetic polymorphisms in 13 genes related to MeHg metabolism for association with glioma risk; genetic associations were also studied in the UK Biobank cohort. Median toenail Hg in cases and controls, respectively, was 0.066 μg/g and 0.069 μg/g (interquartile range (IQR): 0.032-0.161 and 0.031-0.150 μg/g). Toenail Hg was not found to be significantly associated with glioma risk (Odds Ratio: 1.02; 95% Confidence Interval: 0.91, 1.14; p = 0.70 in analysis for ordinal trend with increasing quartile of toenail MeHg). No genetic variant was statistically significant in both of the studies; one variant, rs11859163 (MMP2) had a combined p-value of 0.02 though it was no longer significant after adjustment for multiple testing (Bonferroni corrected p = 1). This study does not support the hypothesis that exposure to MeHg plays a role in the development of glioma at levels of exposure found in this study population.
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Affiliation(s)
- Jordan H Creed
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Inc., Tampa, FL, 33612, USA
| | - Noah C Peeri
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Inc., Tampa, FL, 33612, USA
| | - Gabriella M Anic
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Inc., Tampa, FL, 33612, USA
| | - Reid C Thompson
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Jeffrey J Olson
- Department of Neurosurgery, Emory School of Medicine, Atlanta, GA, 30322, USA
| | | | - Sajeel A Chowdhary
- Neuro-Oncology Program, Lynn Cancer Institute, 701 NW 13th Street, Boca Raton, FL, 33486, USA
| | - John D Brockman
- University of Missouri Research Reactor, University of Missouri, Columbia, MO, 65211, USA
| | - Travis A Gerke
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Inc., Tampa, FL, 33612, USA
| | - Louis B Nabors
- Neuro-oncology Program, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Kathleen M Egan
- Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Inc., Tampa, FL, 33612, USA.
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Georgakis MK, Ntinopoulou E, Chatzopoulou D, Petridou ET. Season of birth and primary central nervous system tumors: a systematic review of the literature with critical appraisal of underlying mechanisms. Ann Epidemiol 2017; 27:593-602.e3. [DOI: 10.1016/j.annepidem.2017.08.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 07/20/2017] [Accepted: 08/15/2017] [Indexed: 01/28/2023]
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5
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Georgakis MK, Kalogirou EI, Liaskas A, Karalexi MA, Papathoma P, Ladopoulou K, Kantzanou M, Tsivgoulis G, Petridou ET. Anthropometrics at birth and risk of a primary central nervous system tumour: A systematic review and meta-analysis. Eur J Cancer 2017; 75:117-131. [PMID: 28219020 DOI: 10.1016/j.ejca.2016.12.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 12/06/2016] [Accepted: 12/21/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND The aetiology of primary central nervous system (CNS) tumours remains largely unknown, but their childhood peak points to perinatal parameters as tentative risk factors. In this meta-analysis, we opted to quantitatively synthesise published evidence on the association between birth anthropometrics and risk of primary CNS tumour. METHODS Eligible studies were identified via systematic literature review; random-effects meta-analyses were conducted for the effect of birth weight and size-for-gestational-age on childhood and adult primary CNS tumours; subgroup, sensitivity, meta-regression and dose-response by birth weight category analyses were also performed. RESULTS Forty-one articles, encompassing 53,167 CNS tumour cases, were eligible. Birth weight >4000 g was associated with increased risk of childhood CNS tumour (OR: 1.14, [1.08-1.20]; 22,330 cases). The risk was higher for astrocytoma (OR: 1.22, [1.13-1.31]; 7456 cases) and embryonal tumour (OR: 1.16, [1.04-1.29]; 3574 cases) and non-significant for ependymoma (OR: 1.12, [0.94-1.34]; 1374 cases). Increased odds for a CNS tumour were also noted among large-for-gestational-age children (OR: 1.12, [1.03-1.22]; 10,339 cases), whereas insufficient data for synthesis were identified for other birth anthropometrics. The findings remained robust across subgroup and sensitivity analyses controlling for several sources of bias, whereas no significant heterogeneity or publication bias were documented. The limited available evidence on adults (4 studies) did not reveal significant associations between increasing birth weight (500-g increment) and overall risk CNS tumour (OR: 0.99, [0.98-1.00]; 1091 cases) or glioma (OR: 1.03, [0.98-1.07]; 2052 cases). CONCLUSIONS This meta-analysis confirms a sizeable association of high birth weight, with childhood CNS tumour risk, particularly astrocytoma and embryonal tumour, which seems to be independent of gestational age. Further research is needed to explore underlying mechanisms, especially modifiable determinants of infant macrosomia, such as gestational diabetes.
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Affiliation(s)
- Marios K Georgakis
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Eleni I Kalogirou
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Athanasios Liaskas
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Maria A Karalexi
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Paraskevi Papathoma
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Kyriaki Ladopoulou
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Maria Kantzanou
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece
| | - Georgios Tsivgoulis
- Second Department of Neurology, Attikon University General Hospital, School of Medicine, National and Kapodistrian University of Athens, 1 Rimini Str, 12462, Chaidari, Athens, Greece
| | | | - Eleni Th Petridou
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527, Goudi, Athens, Greece.
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6
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Cytomegalovirus as an oncomodulatory agent in the progression of glioma. Cancer Lett 2017; 384:79-85. [DOI: 10.1016/j.canlet.2016.10.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/13/2016] [Accepted: 10/14/2016] [Indexed: 12/12/2022]
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7
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Egan KM, Nabors LB, Thompson ZJ, Rozmeski CM, Anic GA, Olson JJ, LaRocca RV, Chowdhary SA, Forsyth PA, Thompson RC. Analgesic use and the risk of primary adult brain tumor. Eur J Epidemiol 2016; 31:917-25. [PMID: 26894804 DOI: 10.1007/s10654-016-0129-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/13/2016] [Indexed: 12/21/2022]
Abstract
Glioma and meningioma are uncommon tumors of the brain with few known risk factors. Regular use of aspirin has been linked to a lower risk of gastrointestinal and other cancers, though evidence for an association with brain tumors is mixed. We examined the association of aspirin and other analgesics with the risk of glioma and meningioma in a large US case-control study. Cases were persons recently diagnosed with glioma or meningioma and treated at medical centers in the southeastern US. Controls were persons sampled from the same communities as the cases combined with friends and other associates of the cases. Information on past use of analgesics (aspirin, other anti-inflammatory agents, and acetaminophen) was collected in structured interviews. Logistic regression was used to estimate odds ratios (ORs) and 95 % confidence intervals (CIs) for analgesic use adjusted for potential confounders. All associations were considered according to indication for use. A total of 1123 glioma cases, 310 meningioma cases and 1296 controls were included in the analysis. For indications other than headache, glioma cases were less likely than controls to report regular use of aspirin (OR 0.69; CI 0.56, 0.87), in a dose-dependent manner (P trend < 0.001). No significant associations were observed with other analgesics for glioma, or any class of pain reliever for meningioma. Results suggest that regular aspirin use may reduce incidence of glioma.
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Affiliation(s)
- Kathleen M Egan
- Division of Population Sciences, Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, MRC-CANCONT, Tampa, FL, 33612-9416, USA.
| | - Louis B Nabors
- Neuro-Oncology Program, University of Alabama at Birmingham, FOT 1020, 510 20th St. South, Birmingham, AL, 35294, USA
| | - Zachary J Thompson
- Division of Population Sciences, Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, MRC-CANCONT, Tampa, FL, 33612-9416, USA
| | - Carrie M Rozmeski
- Division of Population Sciences, Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, MRC-CANCONT, Tampa, FL, 33612-9416, USA
| | - Gabriella A Anic
- Division of Population Sciences, Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, MRC-CANCONT, Tampa, FL, 33612-9416, USA
| | - Jeffrey J Olson
- Department of Neurosurgery, Emory University School of Medicine, 1365-B Clifton Rd., NE, Ste. 2200, Atlanta, GA, 30322, USA
| | - Renato V LaRocca
- Department of Hematology-Oncology, Norton Cancer Institute, 315 E. Broadway, Louisville, KY, 40202, USA
| | - Sajeel A Chowdhary
- Neuro-Oncology Program, Lynn Cancer Institute and the Boca Raton Regional Hospital, 701 NW 13th Street, Boca Raton, FL, 33486, USA
| | - Peter A Forsyth
- Department of Neuro-Oncology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL, 33612, USA
| | - Reid C Thompson
- Department of Neurological Surgery, Vanderbilt University Medical Center, 691 Preston Building, Nashville, TN, 37232, USA
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Abstract
The Rotterdam Study is a prospective cohort study ongoing since 1990 in the city of Rotterdam in The Netherlands. The study targets cardiovascular, endocrine, hepatic, neurological, ophthalmic, psychiatric, dermatological, otolaryngological, locomotor, and respiratory diseases. As of 2008, 14,926 subjects aged 45 years or over comprise the Rotterdam Study cohort. The findings of the Rotterdam Study have been presented in over 1200 research articles and reports (see www.erasmus-epidemiology.nl/rotterdamstudy ). This article gives the rationale of the study and its design. It also presents a summary of the major findings and an update of the objectives and methods.
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9
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Early origins of chronic obstructive lung diseases across the life course. Eur J Epidemiol 2014; 29:871-85. [PMID: 25537319 DOI: 10.1007/s10654-014-9981-5] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 12/06/2014] [Indexed: 12/12/2022]
Abstract
Chronic obstructive lung diseases, like asthma and chronic obstructive pulmonary disease, have high prevalences and are a major public health concern. Chronic obstructive lung diseases have at least part of their origins in early life. Exposure to an adverse environment during critical periods in early life might lead to permanent developmental adaptations which results in impaired lung growth with smaller airways and lower lung volume, altered immunological responses and related inflammation, and subsequently to increased risks of chronic obstructive lung diseases throughout the life course. Various pathways leading from early life factors to respiratory health outcomes in later life have been studied, including fetal and early infant growth patterns, preterm birth, maternal obesity, diet and smoking, children's diet, allergen exposure and respiratory tract infections, and genetic susceptibility. Data on potential adverse factors in the embryonic and preconception period and respiratory health outcomes are scarce. Also, the underlying mechanisms how specific adverse exposures in the fetal and early postnatal period lead to chronic obstructive lung diseases in later life are not yet fully understood. Current studies suggest that interactions between early environmental exposures and genetic factors such as changes in DNA-methylation and RNA expression patterns may explain the early development of chronic obstructive lung diseases. New well-designed epidemiological studies are needed to identify specific critical periods and to elucidate the mechanisms underlying the development of chronic obstructive lung disease throughout the life course.
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10
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The Generation R Study: Biobank update 2015. Eur J Epidemiol 2014; 29:911-27. [PMID: 25527369 DOI: 10.1007/s10654-014-9980-6] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 12/06/2014] [Indexed: 12/14/2022]
Abstract
The Generation R Study is a population-based prospective cohort study from fetal life until adulthood. The study is designed to identify early environmental and genetic causes and causal pathways leading to normal and abnormal growth, development and health from fetal life, childhood and young adulthood. In total, 9,778 mothers were enrolled in the study. Data collection in children and their parents include questionnaires, interviews, detailed physical and ultrasound examinations, behavioural observations, Magnetic Resonance Imaging and biological samples. Efforts have been conducted for collecting biological samples including blood, hair, faeces, nasal swabs, saliva and urine samples and generating genomics data on DNA, RNA and microbiome. In this paper, we give an update of the collection, processing and storage of these biological samples and available measures. Together with detailed phenotype measurements, these biological samples provide a unique resource for epidemiological studies focused on environmental exposures, genetic and genomic determinants and their interactions in relation to growth, health and development from fetal life onwards.
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11
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Socioeconomic status and glioblastoma risk: a population-based analysis. Cancer Causes Control 2014; 26:179-185. [PMID: 25421378 DOI: 10.1007/s10552-014-0496-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 11/06/2014] [Indexed: 12/31/2022]
Abstract
PURPOSE Socioeconomic status (SES) is associated with risk of various cancer types because of correlation between SES and causal factors or increased case ascertainment, or both. Studies evaluating the association between glioblastoma and occupational or SES factors have yielded inconsistent results. We evaluated the association between SES and glioblastoma risk using a large, population-based cancer registry dataset. METHODS Data of the Surveillance, Epidemiology, and End Results Program were used to evaluate the impact of SES on glioblastoma risk. SES was divided into quintiles on the basis of census tract of residence. Census tracts are small, geographically defined areas with relatively homogeneous population characteristics. RESULTS Higher SES was strongly associated with increased risk of glioblastoma (p < .001). Relative to persons living in census tracts of the lowest SES quintile, the highest SES quintile had a rate ratio of 1.45 (95 % CI 1.39-1.51) (p < .001). Similar associations were seen in population subgroups defined by age, sex, and race. CONCLUSIONS The strong association between higher SES and greater glioblastoma risk is unlikely to represent an ascertainment effect because glioblastoma is rapidly progressive and ultimately fatal. A number of previously proposed glioma risk factors may be correlated with SES, including atopy and allergy rates, cellular telephone use, and body morphometric measures. Further research is needed to define the mechanism of this association.
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12
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Kitahara CM, Gamborg M, Rajaraman P, Sørensen TIA, Baker JL. A prospective study of height and body mass index in childhood, birth weight, and risk of adult glioma over 40 years of follow-up. Am J Epidemiol 2014; 180:821-9. [PMID: 25205831 PMCID: PMC4188341 DOI: 10.1093/aje/kwu203] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 07/08/2014] [Indexed: 12/22/2022] Open
Abstract
Greater attained height and greater body mass index (BMI; weight (kg)/height (m)(2)) in young adulthood have been associated with glioma risk, but few studies have investigated the association with body size at birth or during childhood, when the brain undergoes rapid cell growth and differentiation. The Copenhagen School Health Records Register includes data on 320,425 Danish schoolchildren born between 1930 and 1989, with height and weight measurements from ages 7-13 years and parentally recorded birth weights. We prospectively evaluated associations between childhood height and BMI, birth weight, and adult glioma risk. During follow-up (1968-2010), 355 men and 253 women aged ≥18 years were diagnosed with glioma. In boys, height at each age between 7 and 13 years was positively associated with glioma risk; hazard ratios per standard-deviation score at ages 7 (approximately 5.1 cm) and 13 (approximately 7.6 cm) years were 1.17 (95% confidence interval (CI): 1.05, 1.30) and 1.21 (95% CI: 1.09, 1.35), respectively. No associations were observed for childhood height in girls or for BMI. Birth weight was positively associated with risk (per 0.5 kg: hazard ratio = 1.13, 95% CI: 1.04, 1.24). These results suggest that exposures associated with higher birth weight and, in boys, greater height during childhood may contribute to the etiology of adult glioma.
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Affiliation(s)
| | | | | | | | - Jennifer L. Baker
- Correspondence to Dr. Jennifer L. Baker, Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospitals, The Capital Region, Nordre Fasanvej 57, Frederiksberg, Denmark (e-mail: )
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