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Environmental Tobacco Smoke, Genetic...

Kim, Claire Hahni.

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Environmental Tobacco Smoke, Genetic Susceptibility, and Lung Cancer among Never Smokers.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Environmental Tobacco Smoke, Genetic Susceptibility, and Lung Cancer among Never Smokers./
作者:	Kim, Claire Hahni.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	125 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.
Contained By:	Dissertation Abstracts International77-11B(E).
標題:	Epidemiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10120202
ISBN:	9781339813912

Environmental Tobacco Smoke, Genetic Susceptibility, and Lung Cancer among Never Smokers.
Kim, Claire Hahni.

Environmental Tobacco Smoke, Genetic Susceptibility, and Lung Cancer among Never Smokers. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 125 p.

Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.

Thesis (Ph.D.)--University of California, Los Angeles, 2016.

Background Although exposure to environmental tobacco smoke (ETS) is a well-established risk factor for lung cancer in never smokers, studies to date have not been able to precisely estimate the magnitudes of association between ETS and lung cancer by histological subtypes, especially for small cell lung cancer, large cell lung cancer, and adenocarcinoma in situ/minimally invasive carcinoma (AIS/MIA). In addition, few studies have investigated the roles of candidate susceptibility genes in lung cancer development and explored their potential interactions in relation to ETS exposure among never smokers.

ISBN: 9781339813912Subjects--Topical Terms:

568544
Epidemiology.

Environmental Tobacco Smoke, Genetic Susceptibility, and Lung Cancer among Never Smokers.
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245 1 0 $a Environmental Tobacco Smoke, Genetic Susceptibility, and Lung Cancer among Never Smokers.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 125 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.
500 $a Advisers: Zuo-Feng Zhang; Jian Yu Rao.
502 $a Thesis (Ph.D.)--University of California, Los Angeles, 2016.
520 $a Background Although exposure to environmental tobacco smoke (ETS) is a well-established risk factor for lung cancer in never smokers, studies to date have not been able to precisely estimate the magnitudes of association between ETS and lung cancer by histological subtypes, especially for small cell lung cancer, large cell lung cancer, and adenocarcinoma in situ/minimally invasive carcinoma (AIS/MIA). In addition, few studies have investigated the roles of candidate susceptibility genes in lung cancer development and explored their potential interactions in relation to ETS exposure among never smokers.
520 $a Objectives and Specific Aims The overall objective of this doctoral dissertation is to examine the associations of ETS exposure and variants of candidate genes with lung cancer susceptibility and to assess potential gene-environmental interactions among never smokers. The specific aims were: 1) To estimate the magnitudes of association between exposure to ETS and risk of lung cancer by major histological type (adenocarcinoma, squamous cell carcinoma, large cell lung cancer, and small cell lung cancer) and for AIS/MIA; 2) To estimate the associations between polymorphisms of DNA repair, carcinogen metabolism, and cell cycle control genes and lung cancer in never smokers and to test for gene-environmental interactions with ETS exposure; and 3) To evaluate the associations of genetic polymorphisms related to miRNAs and stem cell regulation with lung cancer susceptibility in never smokers and to assess potential gene-environmental interactions with ETS exposure.
520 $a Study Design and Population We conducted case-control studies using pooled data from 18 studies participating in the International Lung Cancer Consortium (ILCCO) for Specific Aims 1 and 2 and pooled data from the Jiangsu Four Cancers Study and the Taiyuan Air Pollution and Lung Cancer Study for Specific Aim 3. The study populations in the ILCCO studies were racially diverse while all participants in the Jiangsu and Taiyuan Studies were Chinese. All studies provided epidemiologic data collected through interviews using structured questionnaires. There was a total of 12,667 cases (2,503 never smokers) and 14,410 controls (7,276 never smokers) in the pooled ILCCO data and 382 non-smoking cases and 1,271 non-smoking controls in the pooled data of Jiangsu and Taiyuan Studies.
520 $a Statistical Methods We imputed the missing data for pack-years of smoking, education, and income using the median values among controls. Observations with missing data for other variables were excluded from the analyses. Potential confounders were adjusted for in data analyses, including age, sex, study or area of residence, race/ethnicity (ILCCO studies only), education (Chinese studies only), and income (Chinese studies only). We also adjusted for tobacco smoking status and pack-years of smoking in analyses including both ever and never smokers. We used multivariate unconditional logistic regression analyses to estimate adjusted odds ratios (OR) and 95% confidence intervals (CI) for the associations and ratio of odds ratios (ROR) and 95% CI for gene-environmental interactions of interest. In order to mitigate sparse data bias, we employed the semi-Bayesian shrinkage method with informative priors based on the literature (when available) or a null-effect prior of OR=1.00 and 95% CI 0.25--4.00. Multiplicative interactions were assessed using the product-term method to estimate the ratio of odds ratios (ROR). Additive interactions were assessed by estimating the relative excess risk due to interaction (RERI).
520 $a Discussion and Conclusions Our results confirm the role of ETS exposure in the development of lung cancer. Furthermore, the strengths of the associations vary by histological type and the association is stronger for small cell lung cancer than other histological types. This is the first large-scale collaborative study on the gene-environmental interactions between polymorphisms of DNA repair, carcinogen metabolism, cell cycle control, miRNA, and stem cell regulation genes and lung cancer susceptibility in never smokers. Our results add to the body of evidence demonstrating that polymorphisms of these genes affect lung cancer development in never smokers, and also suggest that some of these SNPs interact with ETS either multiplicatively or additively.
520 $a Public Health Implications Identification of lung cancer susceptibility genes may aid in personalized risk prediction. A better understanding of the genetic, environmental, and behavioral risk factors for lung cancer in never smokers would help to identify those who need to be targeted for preventive interventions against lung cancer. (Abstract shortened by ProQuest.).
590 $a School code: 0031.
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650 4 $a Oncology. $3 751006
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