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Life Sciences

Wayne State University Dissertations

Theses/Dissertations

2018

Cancer

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Biochemical And Cellular Studies Of Apobec3 Family Dna-Cytosine Deaminases, Sachini Umedi Siriwardena Jan 2018

Biochemical And Cellular Studies Of Apobec3 Family Dna-Cytosine Deaminases, Sachini Umedi Siriwardena

Wayne State University Dissertations

The AID/APOBEC family of enzymes deaminate cytosines in single-stranded DNA to uracils leading to base substitutions and strand breaks. Members of APOBEC3 family in humans are induced by cytokines produced during the body's inflammatory response to infections and provide innate immunity against viruses. However, there is emerging consensus that these enzymes can cause mutations in the cellular genome depending on the physiological state of the cell and the phase of the cell cycle they are expressed. Since aberrant expression of APOBEC3B was recently identified as a possible source of cancer, we initiated a study to determine the maximally active catalytic …


Missing Heritability And Novel Germline Risk Loci In Hereditary Ovarian Cancer: Insights From Whole Exome Sequencing And Functional Analyses, Jaime Lyn Stafford Jan 2018

Missing Heritability And Novel Germline Risk Loci In Hereditary Ovarian Cancer: Insights From Whole Exome Sequencing And Functional Analyses, Jaime Lyn Stafford

Wayne State University Dissertations

While 25% of ovarian cancer (OVCA) cases are due to inherited factors, most of the genetic risk remains unexplained. This study addressed this gap by identifying previously undescribed OVCA risk loci through the whole exome sequencing (WES) of 48 BRCA1/BRCA2 wild type women diagnosed with OVCA, selected for high risk of genetic inheritance. Five clearly pathogenic variants were identified in this sample, four of which are in two genes featured on current multi-gene panels; (RAD51D, ATM). In addition, a high impact variant in FANCM (R1931*) was identified. FANCM has been recently implicated in familial breast cancer risk but is not …