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Cancer Biology Commons

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Articles 1 - 6 of 6

Full-Text Articles in Cancer Biology

Characterizing The C-Terminal Region Of Human Adenovirus E1a: An Undiscovered Country, Michael J. Cohen Sep 2015

Characterizing The C-Terminal Region Of Human Adenovirus E1a: An Undiscovered Country, Michael J. Cohen

Electronic Thesis and Dissertation Repository

Human Adenovirus (HAdV) E1A is the first protein expressed during viral infection. The primary function of E1A is to reprogram the cell for viral replication, but it is additionally capable of transforming primary rodent cells in co-operation with other oncogenes such as HAdV E1B. Despite extensive study, little is known about the function and cellular targets of the C-terminal region of E1A. Importantly, this region is required for the transforming ability of E1A with E1B, but can also suppress transformation with Ras. Previous studies showed that interaction with the C-terminal Binding Protein (CtBP) plays a role in both functions described ...


Clinical And Experimental Importance Of Circulating Tumor Cells In Prostate Cancer, Lori Lowes Sep 2015

Clinical And Experimental Importance Of Circulating Tumor Cells In Prostate Cancer, Lori Lowes

Electronic Thesis and Dissertation Repository

Prostate cancer (PCa) remains a leading cause of death in men, primarily due to ineffective treatment in the metastatic setting. During this phase of PCa, circulating tumor cells (CTCs) are shed into the bloodstream and their presence and number are important in patient prognosis. The CellSearch® system (CSS) is the only U.S. Food and Drug Administration (FDA) and Health Canada approved instrument for detection of CTCs, making it the current clinical gold standard in CTC technology. Although the CSS provides a minimally invasive means of patient monitoring in the metastatic setting, little is known about the role of CTCs ...


The Role Of Connexins And Pannexins In Mammary Gland Development And Tumorigenesis, Michael K. G. Stewart Aug 2015

The Role Of Connexins And Pannexins In Mammary Gland Development And Tumorigenesis, Michael K. G. Stewart

Electronic Thesis and Dissertation Repository

The identification of key regulators of breast cancer onset and progression is critical for the development of targeted therapies. Connexins and pannexins are characterized by their ability to form large-pore channels and are frequently dysregulated in cancer. However, their role in breast cancer progression remains poorly understood due to a lack of in vivo models capable of assessing the proposed and opposing roles of connexins and pannexins as both tumor suppressors and/or facilitators in multiple stages of the disease. Using 2 previously uncharacterized genetically-modified mice, connexin43 (Cx43) and connexin26 (Cx26) were evaluated for their role in normal mammary gland ...


The Lung Microenvironment Influences The Metastatic Behaviour Of Breast Cancer Cells In An Innovative 3d Ex Vivo Pulmonary Metastasis Model, Matt M. Piaseczny Jun 2015

The Lung Microenvironment Influences The Metastatic Behaviour Of Breast Cancer Cells In An Innovative 3d Ex Vivo Pulmonary Metastasis Model, Matt M. Piaseczny

Electronic Thesis and Dissertation Repository

Lung metastasis remains a leading cause of death in breast cancer patients. This study established an innovative 3D ex vivo pulmonary metastasis assay (PuMA) to test the hypothesis that the lung microenvironment promotes metastatic behaviour of whole population and stem-like ALDHhiCD44+ breast cancer cells. Following in vivo delivery of breast cancer cells to mice, lungs were excised, maintained in culture and imaged to observe breast cancer growth over time. We observed metastatic progression of breast cancer cells in the PuMA, most notably of ALDHhiCD44+ cells which progressed rapidly from single cells to multicellular colonies over 21 ...


Investigating The Role Of Hydrogen Sulfide In The Survival, Growth And Angiogenic Potential Of Clear Cell Renal Cell Carcinoma Cell Lines And Xenografts, Eric Sonke Jun 2015

Investigating The Role Of Hydrogen Sulfide In The Survival, Growth And Angiogenic Potential Of Clear Cell Renal Cell Carcinoma Cell Lines And Xenografts, Eric Sonke

Electronic Thesis and Dissertation Repository

Clear cell renal cell carcinoma (ccRCC) is characterized by Von Hippel-Lindau (VHL)-deficiency, resulting in pseudohypoxic, angiogenic and glycolytic tumours. Hydrogen sulfide (H2S) is an endogenously-produced gasotransmitter that accumulates under hypoxia and has been shown to be pro-angiogenic and cytoprotective in cancer. It was hypothesized that H2S levels are elevated in VHL-deficient ccRCC, contributing to survival, metabolism, and angiogenesis. Using H2S-specific probes, it was found that H2S levels were higher in VHL-deficient ccRCC cell lines compared to cells with wild-type VHL. Inhibition of H2S-producing enzymes could reduce the proliferation, metabolism ...


Atrx Loss-Of-Function In Mouse Neuroprogenitor Cells As A Model Of Early Events In Gliomagenesis, Hannah E. Goldberg Feb 2015

Atrx Loss-Of-Function In Mouse Neuroprogenitor Cells As A Model Of Early Events In Gliomagenesis, Hannah E. Goldberg

Electronic Thesis and Dissertation Repository

ATRX is a chromatin remodeling protein important for neural development, and ATRX inactivation leads to genomic instability, mitotic defects and TP53-mediated apoptosis. In the last few years, ATRX mutations were identified in a large proportion of paediatric and adult gliomas that often coincide with mutations in the tumor suppressor TP53. The present work shows that combinatorial loss of ATRX and TP53 function in vitro causes genomic instability while improving cell viability, identifying potential early events in gliomagenesis. Furthermore, several gene transcripts associated with glioma development and known oncogenic pathways were significantly upregulated in the Atrx-null neonatal mouse forebrain. Finally ...