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Full-Text Articles in Medical Toxicology
Assessing The Role Of Arsenite In Disrupting The Egfr Signaling Axis., Christine Kim
Assessing The Role Of Arsenite In Disrupting The Egfr Signaling Axis., Christine Kim
Electronic Theses and Dissertations
The epidermal growth factor receptor (EGFR) is a receptor tyrosine kinase localized on the cell surface. Overexpression of EGFR has been used as biomarkers for many different types of cancers, including lung cancer. There is a strong association between arsenic and lung cancer development, although the mechanism is unclear. We hypothesize that chronic exposure of “a physiologically relevant” level of arsenite disrupts the EGFR endocytic trafficking. The goal of this project is to identify molecular mechanisms and roles of chronic arsenite-induced EGFR overexpression in lung cancer development. A non-malignant human bronchial epithelial cell line, Beas-2B cells were exposed to 100 …
Nucleotide Excision Repair: Impacts Of Environmental Carcinogens And Its Role In Cancer Susceptibility In Appalachian Kentucky, Nathaniel C. Holcomb
Nucleotide Excision Repair: Impacts Of Environmental Carcinogens And Its Role In Cancer Susceptibility In Appalachian Kentucky, Nathaniel C. Holcomb
Theses and Dissertations--Toxicology and Cancer Biology
Lung cancer is a particularly devastating disease, accounting for the most deaths among all cancer types in the United States. Despite a reduction in the country’s smoking rates, cigarette smoking remains the number one risk factor for lung cancer. Additionally arsenic exposure, which occurs primarily through contaminated drinking water in the U.S., is associated with increased lung cancer incidence. The nucleotide excision repair (NER) pathway is critical for maintenance of genomic fidelity, removing DNA lesions that could otherwise promote DNA mutations and drive carcinogenesis. Tobacco smoking introduces significant amounts of DNA damage and produces characteristic DNA mutations found in lung …
Arsenic Targets Neural Plate Border Specifier Cells In P19 Cells, Christopher Mccoy
Arsenic Targets Neural Plate Border Specifier Cells In P19 Cells, Christopher Mccoy
All Theses
Epidemiological studies have shown that arsenic exposure during early embryogenesis can cause reduced weight gain and neurological deficits later on in life. In addition, in vitro and in vivo studies have indicated that arsenic suppresses neurogenesis and myogenesis. The exact mechanism of how arsenic causes these undesired developmental outcomes is poorly understood, however both skeletal muscle and sensory neuron development require the Wnt/β-catenin signaling pathway to initiate the specific differentiation of precursor cells. We were interested in determining the target cell population of arsenic and its metabolites. Arsenic's metabolites were of interest because they have been shown to be more …