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Articles 1 - 13 of 13
Full-Text Articles in Medicine and Health Sciences
Environmental Exposures And Aging., Daniel Chris Gomes
Environmental Exposures And Aging., Daniel Chris Gomes
Electronic Theses and Dissertations
In recent years, research into air pollution has shown that exposure to certain components in air pollution, primarily PM2.5 can accelerate biological aging and thereby lead to increased susceptibility to multiple diseases. We hypothesize that prolonged exposure to air pollutants can result in premature aging leading to extensive tissue dysfunction and susceptibility to diseases. To examine this, we exposed mice to PM2.5 for 9, 15, and 21 days, then measured the telomere lengths, cellular senescence, and histone methylation patterns of multiple cell types. We found consistently increased telomere attrition, cellular senescence and advanced age-consistent histone methylation patterns in groups exposed …
Clinical And Environmental Factors Affecting The Survival Outcomes Among Stage 1a Tn0m0 First Primary Non-Small Cell Lung Carcinoma Patients In The United States., Naiya Patel
Electronic Theses and Dissertations
Background: Lung cancer is the second leading cause of death in the United States (U.S.). The most prevalent histological type of lung cancer is Non-Small Cell Lung Cancer (NSCLC), which has an overall five years survival of 5% if left untreated. Therefore, early treatment of NSCLC is vital to improve overall survival (OS) outcomes. Several factors affect survival outcomes, which can be categorized as modifiable or non-modifiable. The difference in timely receipt of guideline-concordant treatment affects the survival outcomes of patients with stage 1A NSCLC. This dissertation explored factors that affect treatment and survival outcomes among stage 1A NSCLC patients …
The Role Of E-Liquid Constituents In E-Cigarette-Induced Cardiac Arrhythmia And Autonomic Imbalance., Cory Kucera
The Role Of E-Liquid Constituents In E-Cigarette-Induced Cardiac Arrhythmia And Autonomic Imbalance., Cory Kucera
Electronic Theses and Dissertations
Introduction. Accumulating evidence indicates that exposure to electronic cigarettes (e-cigs) promotes sympathetic dominance and electrophysiologic instability in the heart, potentially culminating in arrhythmogenesis. E-liquids contain various formulations of nicotine and flavorings, but the effects of specific e-liquid constituents and their concentrations on e-cig-induced autonomic imbalance and electrical dysfunction are unresolved. To that end, we tested the hypothesis that e-cigs modify cardiac autonomic balance and ventricular arrhythmogenesis in mice dependent on e-liquid constituent type and concentration. Methods. Using a crossover design and a serial exposure regimen, ECG-telemetered male C57BL/6J mice underwent whole-body exposure to e-cig aerosols generated from e-liquids containing different …
The Impact Of Volatile Organic Compound Exposure On Subclinical Biomarkers Of Cardiovascular Injury., Breandon Taylor
The Impact Of Volatile Organic Compound Exposure On Subclinical Biomarkers Of Cardiovascular Injury., Breandon Taylor
Electronic Theses and Dissertations
Pollution has been identified as the leading environmental cause of non-communicable disease and premature deaths globally. Volatile organic compounds (VOCs) are gaseous chemical constituents of pollution derived from a variety of sources, including industrial solvents and byproducts, automobile exhaust, tobacco smoke, cleaning supplies, and personal care products. VOCs are also abundant at various Superfund and Hazardous Waste Sites. Emerging data suggest that VOC exposure is associated with several adverse health outcomes, including cardiovascular disease (CVD). VOCs and their metabolites can potentially damage the endothelial lining of blood vessels, resulting in perturbed vascular function and vascular inflammation. We hypothesize that VOC …
The Role Of Mmp-3 In Copper Oxide Nanoparticle-Induced Pulmonary Inflammation And Fibrosis., Yuanbao Zhang
The Role Of Mmp-3 In Copper Oxide Nanoparticle-Induced Pulmonary Inflammation And Fibrosis., Yuanbao Zhang
Electronic Theses and Dissertations
Copper oxide nanoparticles (Nano-CuO) are wildly used in medical and industrial fields and our daily necessities. However, the biosafety assessment of Nano-CuO is far behind their rapid development. This study was to investigate the potential mechanisms underlying Nano-CuO-induced pulmonary inflammation and fibrosis, especially to determine whether Nano-CuO exposure could dysregulate MMP-3, an important mediator in pulmonary fibrosis, and its roles in Nano-CuO-induced pulmonary inflammation and fibrosis. Aim 1 was to investigate whether exposure to Nano-CuO caused MMP-3 dysregulation in lung epithelial cells and the role of MMP-3 in Nano-CuO-induced alteration of cell junction-associated proteins. The potential mechanisms that might be …
Protest-Related Tear Gas Exposure And Menstrual Function, Emily Kathleen (Steinmetz) Reece
Protest-Related Tear Gas Exposure And Menstrual Function, Emily Kathleen (Steinmetz) Reece
Electronic Theses and Dissertations
During the racial justice protests of 2020 and 2021, crowd control chemical irritants (referred to as “tear gas”) were deployed against protesters, after which there were anecdotal reports of altered menstrual cycles among exposed individuals. There is only one peer reviewed published study on tear gas exposure and menstrual health. This study examined whether tear gas exposure was associated with menstrual cycle outcomes among women attending the 2020-2021 protests. Data from 103 women who attended racial justice protests in 2020 and 2021 were collected through an online questionnaire. Data included protest attendance, acute symptoms of tear gas exposure, whether medical …
Development And Validation Of Biosafety Climate Scale And Survey-Based Analyses Of Safety Perceptions In Biological Research And Teaching Laboratories At Public Universities In The Usa., Sivarchana Mareedu
Electronic Theses and Dissertations
Biosafety plays a key role in ensuring safety of researchers’ as well as the public from unintentional exposures to infectious agents. However, the occurrence of lab acquired infections, exposures, and safety lapses in biological laboratories underscores challenges in biosafety program management. The raise in emerging and reemerging infectious diseases and the ongoing COVID-19 pandemic reiterates the need for biosafety and research community to work together. Literature recommends the application of safety climate in measuring safety culture. The goal of this dissertation is to quantify biosafety climate and examine associated factors to understand the gaps between research and biosafety professionals in …
Identifying The Cardiovascular Effects Of Multiple Pollutants., Katlyn Elizabeth Mcgraw
Identifying The Cardiovascular Effects Of Multiple Pollutants., Katlyn Elizabeth Mcgraw
Electronic Theses and Dissertations
Cardiovascular disease (CVD) is the leading cause of death from environmental exposures. Although exposure to PM2.5 is an established risk factor for CVD, the contribution of other hazardous pollutant exposure to CVD is less clear. Overall, this work aimed to examine the effect of pollutants with lesser documented effects on cardiovascular disease using a multi-pronged approach to exposure assessment. The three aims were to examine the relationship between county-level toxic chemical releases and CVD mortality in the contiguous United States between 2002 and 2012, to assess the relationship between individual-level VOC metabolites and vascular function, and to build multipollutant …
Tobacco Smoke Exposures And Fertility-Related Outcomes Among Females Seeking Fertility Care, And The Interaction With N-Acetyltransferase 2 (Nat2).., T'Shura S. A. Ali
Tobacco Smoke Exposures And Fertility-Related Outcomes Among Females Seeking Fertility Care, And The Interaction With N-Acetyltransferase 2 (Nat2).., T'Shura S. A. Ali
Electronic Theses and Dissertations
Cigarette smoke contains thousands of harmful substances and is one of the leading preventable causes of mortality and morbidity in the United States. Past studies examining tobacco smoke exposures on fecundability and pregnancy outcomes are inconsistent. NAT2 is an important enzyme in the metabolism of xenobiotic substances found within tobacco smoke. This preconception cohort study examines associations between active smoking and secondhand smoke exposure (SHSe) on fecundability and spontaneous abortion (SA), and explores a possible interaction with NAT2 acetylator status. A total of 223 women seeking fertility care were followed for up to 2.3 years. Preconception tobacco smoke exposures were …
The Effects Of Polychlorinated Biphenyls Exposure On Non-Alcoholic Fatty Liver Disease : Role Of Aryl Hydrocarbon Receptor., Hongxue Shi
Electronic Theses and Dissertations
Polychlorinated biphenyls (PCBs) are detectable in serum of 100% of adults in US, and has been associated with fatty liver disease in epidemiological studies. PCBs are classified as either dioxin-like (DL) or non-dioxin-like (NDL) PCB based on their ability to activate the aryl hydrocarbon receptor (AhR). We used exposures that reflect human bioaccumulation patterns, which resembles Aroclor 1260 with a low level of the DL-PCB, PCB 126. Our aim was to determine if this exposure will activate the human and mouse AhR and examine if receptor activation influences these steatotic responses due to PCB exposures. DL-PCBs exposure-induced AhR activation in …
Moving Mountains : A Study Examining Long-Term Impacts Of Mountaintop Removal Coal Mining On Mortality In The Appalachian Region Using Geographic Information Sciences Techniques., James Howard Kent Pugh
Moving Mountains : A Study Examining Long-Term Impacts Of Mountaintop Removal Coal Mining On Mortality In The Appalachian Region Using Geographic Information Sciences Techniques., James Howard Kent Pugh
Electronic Theses and Dissertations
Over the last hundred years, the Appalachian region has been dominated by the coal industry. It has also been and currently is one of the unhealthiest regions in the United States. Recent scholarship has examined the relationship between coal mining and health and mortality rates in the Appalachian region. The first study incorporates air quality and pollution data to examine if coal mining counties have higher levels of pollution and if this pollution contributes to mortality disadvantage. In the second study, I construct a population-based coal-exposure measure to better evaluate the relationship between coal mining and health I find that …
Air Pollution, Pulmonary Oxidative Stress, And The Endothelin System In The Development Of Cardiovascular Injury., Jordan B. Finch
Air Pollution, Pulmonary Oxidative Stress, And The Endothelin System In The Development Of Cardiovascular Injury., Jordan B. Finch
Electronic Theses and Dissertations
The goal of this project was to examine the role of endothelin-1 (ET-1) as a mediator in the pathway between air pollution exposure and the development of vascular injury. A human cohort and male mice (C57BL/6 and ecSOD-Tg) were used to evaluate changes in the ET-1 system in response to exposures of fine particulate matter (PM2.5). Human ET-1 levels were significantly associated with environmental factors and markers of vascular change, but were decreased with increased PM2.5. No association was seen between ET-1 and endothelial progenitor cells (EPCs) except for EPC-4, possibly indicating a regulatory relationship with this specific population. In …
Environmental Vegetation : A Possible Association With Cardiovascular Disease Risk., Ray Anthony Yeager Ii
Environmental Vegetation : A Possible Association With Cardiovascular Disease Risk., Ray Anthony Yeager Ii
Electronic Theses and Dissertations
The built environment affects numerous aspects of human health and wellbeing, including risk of cardiovascular disease (CVD), the leading cause of morbidity and mortality in both the U.S. and worldwide. The amount and quality of environmental vegetation, is an important aspect of the built environment that affects known CVD risk factors, including psychosocial stress, health behaviors, and exposure to air pollutants. Nevertheless, little evidence on the role of potential mechanisms and geographic scale in these relationships exists. Of previous studies that describe associations between vegetation and CVD outcomes, limited investigation has been performed to assess these observed relationships in differing …