nicotine/breast neoplasms

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Effect of Genetic Polymorphisms and Long-Term Tobacco Exposure on the Risk of Breast Cancer.

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BACKGROUND Tobacco smoke contains many potentially harmful compounds that may act differently and at different stages in breast cancer development. The focus of this work was to assess the possible role of cigarette smoking (status, dose, duration or age at initiation) and polymorphisms in genes

Estrogen receptor activation by tobacco smoke condensate in hormonal therapy-resistant breast cancer cells.

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The relationship between tobacco smoke and breast cancer incidence has been studied for many years, but the effect of smoking on hormonal therapy has not been previously reported. We investigated the effect of smoking on hormonal therapy by performing in vitro experiments. We first prepared tobacco

Tobacco and alcohol in relation to male breast cancer: an analysis of the male breast cancer pooling project consortium.

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BACKGROUND The etiology of male breast cancer is poorly understood, partly due to its relative rarity. Although tobacco and alcohol exposures are known carcinogens, their association with male breast cancer risk remains ill-defined. METHODS The Male Breast Cancer Pooling Project consortium provided

A case-only analysis of the interaction between N-acetyltransferase 2 haplotypes and tobacco smoke in breast cancer etiology.

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BACKGROUND N-acetyltransferase 2 is a polymorphic enzyme in humans. Women who possess homozygous polymorphic alleles have a slower rate of metabolic activation of aryl aromatic amines, one of the constituents of tobacco smoke that has been identified as carcinogenic. We hypothesized that women with

Case-control study of tobacco smoke exposure and breast cancer risk in Delaware.

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BACKGROUND Tobacco smoke exposure may be associated with increased breast cancer risk, although the evidence supporting the association is inconclusive. We conducted a case-control study in Delaware, incorporating detailed exposure assessment for active and secondhand smoke at home and in the

Alcohol and Tobacco Use in an Ethnically Diverse Sample of Breast Cancer Patients, Including Sea Island African Americans: Implications for Survivorship.

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Background/Objective: Data suggest that modifiable risk factors such as alcohol and tobacco use may increase the risk of breast cancer (BC) recurrence and reduce survival. Female BC mortality in South Carolina is 40% higher among African Americans (AAs) than European Americans (EAs). Given this

Breast cancer and exposure to tobacco smoke during potential windows of susceptibility.

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OBJECTIVE An association between smoking and breast cancer is unresolved, although a higher risk from exposure during windows of susceptibility has been proposed. The objective of this prospective study was to evaluate the association between tobacco smoke and breast cancer with a focus on timing of

Environmental tobacco smoke and breast cancer incidence.

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To evaluate whether environmental tobacco smoke (ETS) influences breast cancer incidence, data from a population-based case-control study were analyzed. Respondents with available ETS information assessed by in-person questionnaires included 1356 newly diagnosed cases and 1383 controls. Relative to

Environmental Tobacco Smoke Exposure and Survival Following Breast Cancer.

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Environmental tobacco smoke (ETS) exposure is hypothesized to influence survival after breast cancer, but few studies have examined this association. A population-based cohort of women (N = 1,508) diagnosed with first primary invasive or in situ breast cancer in 1996 to 1997 was interviewed shortly

Tobacco alkaloid derivatives as inhibitors of breast cancer aromatase.

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The inhibition of estrogen biosynthesis by the use of aromatase inhibitors is emerging as a valuable approach to breast cancer therapy. Because smoking has a profound effect on estrogen-related processes we examined the ability of tobacco constituents to suppress estrogen production by breast cancer

Association of Tobacco Use, Alcohol Consumption and HER2 Polymorphisms With Response to Trastuzumab in HER2-Positive Breast Cancer Patients.

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OBJECTIVE Although the administration of trastuzumab has improved the survival of human epidermal growth factor receptor 2 (HER2)-positive breast cancer patients, resistance remains a major clinical obstacle. We retrospectively evaluated the association of HER2 polymorphisms, tobacco use and alcohol

Environmental tobacco smoke exposure and risk of breast cancer in nonsmoking women: a review with meta-analyses.

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Recent authoritative reviews consider smoking has no effect on breast cancer risk, but some studies report an increase from environmental tobacco smoke (ETS). We reviewed the overall evidence on ETS and breast cancer in nonsmoking women. We extracted details of available studies, derived relative

The associations of adolescent cigarette smoking, alcoholic beverage consumption, environmental tobacco smoke, and ionizing radiation with subsequent breast cancer risk (United States).

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OBJECTIVE Studies of breast cancer among survivors of the World War II atomic bomb blasts over Japan suggest that the adolescent breast may be particularly sensitive to carcinogenic insult. To further explore that possibility we examined the relationships of cigarette smoking, alcohol consumption,

Evaluation of 4-aminobiphenyl-DNA adducts in human breast cancer: the influence of tobacco smoke.

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Breast cancer is one of the major cancers around the world but its etiology is still not well understood. Only approximately 50% of the disease is associated with known risk factors including highly penetrant genes and lifestyle factors. Thus, environmental carcinogens may play an important role in

The effect of nicotine on the expressions of the α7 nicotinic receptor gene and Bax and Bcl-2 proteins in the mammary gland epithelial-7 breast cancer cell line and its relationship to drug resistance.

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The binding of nicotine with nicotinic acetylcholine receptors (nAChRs) stimulates cell division and increases drug resistance in cancer. Experiments with specific inhibitors such as RNAi, hexamethonium, and α-bungarotoxin showed that α7 nicotinic receptor plays a key role in the pro-proliferation

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