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Articles 91 - 108 of 108
Full-Text Articles in Genetics and Genomics
Environmental Stimuli And Intragenerational Epigenetics, Nicholas J. Napier
Environmental Stimuli And Intragenerational Epigenetics, Nicholas J. Napier
Student Scholarship
Epigenetics is the study of any change in gene expression that is not mediated by DNA sequence. The effects of environmental stimuli on epigenetic changes have been studied extensively in recent years. Multiple reviews have provided comprehensive summations of the effects of environmental stimuli on transgenerational epigenetic changes, but few reviews have focused upon environment-induced intragenerational epigenetic changes. This review will summarize current knowledge of the intragenerational epigenetic changes that are induced by two groups of well-studied environmental stimuli: nutritional deficiencies and carcinogens. This survey of intragenerational epigenetic changes will focus upon the mechanisms behind them, the disorders associated with …
Epigenetic Regulation Of Nuclear Hormone Receptor Dax-1, Michael B. Heskett
Epigenetic Regulation Of Nuclear Hormone Receptor Dax-1, Michael B. Heskett
Master's Theses
DAX-1 (NR0B1) is an orphan nuclear receptor that plays a key role in the development and maintenance of steroidogenic tissue in mammals. Dax-1 is also expressed in mouse embryonic stem (ES) cells and is required to maintain pluripotency. Duplication of the X-chromosome in the region containing the NR0B1 gene results in sex reversal, and mutations in NR0B1 cause adrenal hypoplasia congenita. DAX-1 has been observed to act as a corepressor of other nuclear receptors including androgen receptor (AR), estrogen receptor (ER), and steroidogenic factor 1 (SF-1). In addition to pluripotent ES cells, DAX-1 is primarily expressed in select tissues of …
Identification Of Cell Signaling Pathway Regulated By Micrornas In Cancer Cells Using A Systems Biological Approach, Sangbae Kim
Identification Of Cell Signaling Pathway Regulated By Micrornas In Cancer Cells Using A Systems Biological Approach, Sangbae Kim
Dissertations and Theses (Open Access)
MicroRNAs (miRNAs) are single-stranded, non-coding RNA molecules that regulate gene expression via imperfect binding of the miRNA to specific sites in the 3' untranslated region of the mRNAs. Because prediction of miRNA targets is an essential step for understanding the functional roles of miRNAs, many computational approaches have been developed to identify miRNA targets. However, identifying targets remains challenging due to the inherent limitation of current prediction approaches based on imperfect complementarity between miRNA and its target mRNAs. To overcome these current limitations, we developed a novel correlation-based approach that is sequence independence to predict functional targets of miRNAs by …
Discovery And Elucidation Of The Fgfr3-Tacc3 Recurrent Fusion In Glioblastoma, Brittany C. Parker Kerrigan
Discovery And Elucidation Of The Fgfr3-Tacc3 Recurrent Fusion In Glioblastoma, Brittany C. Parker Kerrigan
Dissertations and Theses (Open Access)
Fusion genes occur due to chromosomal instability where two previously separate genes rearrange and fuse together, forming a hybrid gene. The first fusions were reported in leukemias; however, with the advent of more powerful sequencing technologies, fusions have recently been reported in several solid tumors. Using next-generation deep sequencing approaches, we discovered a fusion gene connecting the fibroblast growth factor receptor 3 (FGFR3) gene to the transforming coiled-coil containing protein 3 (TACC3) gene in glioblastoma multiforme. The fusion occurred in 8.3% of patient samples, but not in low grade or normal samples. FGFR3-TACC3 produced an in-frame …
Modeling The Adaptive Immune Response To Mutation-Generated Antigens, Rory J. Geyer
Modeling The Adaptive Immune Response To Mutation-Generated Antigens, Rory J. Geyer
University Scholar Projects
Somatic mutations may drive tumorigenesis or lead to new, immunogenic epitopes (neoantigens). The immune system is thought to represses neoplastic growths through the recognition of neoantigens presented only by tumor cells. To study mutations as well as the immune response to mutation-generated antigens, we have created a conditional knockin mouse line with a gene encoding, 5’ to 3’, yellow fluorescent protein (YFP), ovalbumin (which is processed to the immunologically recognizable peptide, SIINFEKL), and cyan fluorescent protein (CFP), or, YFP-ovalbumin-CFP. A frame shift mutation has been created at the 5’ end of the ovalbumin gene, hence YFP should always be expressed, …
Modeling The Adaptive Immune Response To Mutation-Generated Antigens, Rory J. Geyer
Modeling The Adaptive Immune Response To Mutation-Generated Antigens, Rory J. Geyer
Honors Scholar Theses
Somatic mutations may drive tumorigenesis or lead to new, immunogenic epitopes (neoantigens). The immune system is thought to represses neoplastic growths through the recognition of neoantigens presented only by tumor cells. To study mutations as well as the immune response to mutation-generated antigens, we have created a conditional knockin mouse line with a gene encoding, 5’ to 3’, yellow fluorescent protein (YFP), ovalbumin (which is processed to the immunologically recognizable peptide, SIINFEKL), and cyan fluorescent protein (CFP), or, YFP-ovalbumin-CFP. A frame shift mutation has been created at the 5’ end of the ovalbumin gene, hence YFP should always be expressed, …
I Wish I Had Known This!: Impact Of Age On Life Choices And Testing Satisfaction For Brca1/2 Mutation Carriers Who Underwent Genetic Testing By Age 25, Sarah Elaine King
I Wish I Had Known This!: Impact Of Age On Life Choices And Testing Satisfaction For Brca1/2 Mutation Carriers Who Underwent Genetic Testing By Age 25, Sarah Elaine King
Theses and Dissertations
Objective: To examine if BRCA1/2 mutation carriers who received their positive genetic test result by age 25 were satisfied with their decision to undergo genetic testing and with the choices made regarding family planning, surveillance, and surgery. Methods: 72 participants recruited via social media completed a survey hosted by SurveyMonkey.com. Sixty-three met study criteria and were asked 40 quantitative and qualitative questions designed to assess family planning, surveillance, and surgery needs of young BRCA carriers, which included a six question Satisfaction with Decision Scale. Results: Regardless of age, participants were very satisfied with the decision to undergo genetic testing. Recommendations …
Hypothesis Driven Single Nucleotide Polymorphism Search (Hydn-Snp-S), Rebecca J. Swett, Angela Elias, Jeffrey A. Miller, Gregory E. Dyson, G. AndréS Cisneros
Hypothesis Driven Single Nucleotide Polymorphism Search (Hydn-Snp-S), Rebecca J. Swett, Angela Elias, Jeffrey A. Miller, Gregory E. Dyson, G. AndréS Cisneros
Chemistry Faculty Research Publications
The advent of complete-genome genotyping across phenotype cohorts has provided a rich source of information for bioinformaticians. However the search for SNPs from this data is generally performed on a study-by-study case without any specific hypothesis of the location for SNPs that are predictive for the phenotype. We have designed a method whereby very large SNP lists (several gigabytes in size), combining several genotyping studies at once, can be sorted and traced back to their ultimate consequence in protein structure. Given a working hypothesis, researchers are able to easily search whole genome genotyping data for SNPs that link genetic locations …
Development Of Tools To Assess The Effects Of Lunasin On Normal Development And Tumor Progression In Drosophila Melanogaster, Gillian E. Jones
Development Of Tools To Assess The Effects Of Lunasin On Normal Development And Tumor Progression In Drosophila Melanogaster, Gillian E. Jones
Masters Theses & Specialist Projects
Soy contains many bioactive molecules known to elicit anti-cancer effects. One such peptide, Lunasin, has been shown to selectively act on newly transformed cells while having no cytotoxic effect on non-tumorigenic or established cancer cell lines. In this study we attempt to understand the developmental effects of Lunasin overexpression in vivo and create reagents that will help us understand Lunasin’s anti tumorigenic effects in an intact organism. cDNA encoding lunasin and EGFP-lunasin were cloned into pUAST and microinjected into Drosophila embryos. Tissue-specific overexpression of EGFP-Lun in the resulting transgenic lines was accomplished by crossing transgenics to various GAL4 driver lines. …
The Importance Of Epigenetic Phenomena In Regulating Activity Of The Genetic Material, Sin Chan
The Importance Of Epigenetic Phenomena In Regulating Activity Of The Genetic Material, Sin Chan
Senior Honors Projects
Genetics has taught us that genes are represented as discrete sequences within a larger DNA molecule found embedded within the chromosomes of a living cell. Collectively these chromosomes and their associated genes carry all of the instructions for life. Until recently, the prevailing thought has been that genes are destiny in the life of an individual since the genes carry the information that determines the general traits and characteristics associated with that individual. The relatively recent understanding of mechanisms that underlie epigenetic phenomena has led to a rethinking of this concept. Epigenetics describes cellular mechanisms that explain how two individuals …
Genetics And Cancer, Sachin Puri
Genetics And Cancer, Sachin Puri
A with Honors Projects
Genes' effect in body and relationship with cancer. Role in cell cycle and angiogenesis.
Modeling Measurement Error In Tumor Characterization Studies, Cyril Rakovski, Daniel J. Weisenberger, Paul Marjoram, Peter W. Laird, Kimberly D. Siegmund
Modeling Measurement Error In Tumor Characterization Studies, Cyril Rakovski, Daniel J. Weisenberger, Paul Marjoram, Peter W. Laird, Kimberly D. Siegmund
Mathematics, Physics, and Computer Science Faculty Articles and Research
Background: Etiologic studies of cancer increasingly use molecular features such as gene expression, DNA methylation and sequence mutation to subclassify the cancer type. In large population-based studies, the tumor tissues available for study are archival specimens that provide variable amounts of amplifiable DNA for molecular analysis. As molecular features measured from small amounts of tumor DNA are inherently noisy, we propose a novel approach to improve statistical efficiency when comparing groups of samples. We illustrate the phenomenon using the MethyLight technology, applying our proposed analysis to compare MLH1 DNA methylation levels in males and females studied in the Colon …
The Role Of Trm9 In Stress Responses, Ashish Ravindra Patil
The Role Of Trm9 In Stress Responses, Ashish Ravindra Patil
Legacy Theses & Dissertations (2009 - 2024)
Cells need to respond appropriately to environmental changes in order to maintain homeostasis. The cellular response to an environmental stress is regulated at transcriptional, translational and post translational levels. The tRNA, which acts as an adaptor molecule between the mRNA and the protein, plays an important role in the translational regulation of cellular responses to stress and is one of the most heavily modified biomolecules. In Saccharomyces cerevisiae , the wobble uracil of the tRNA(3'-UCU-5') Arg, tRNA(3'-UUC-5') Glu and certain other specific tRNAs are modified to 5-methoxycarbonylmethyluridine (mcm5U) and 5-methoxycarbonylmethyl-2-thiouridine (mcm5s2U) residues by the tRNA methyltransferase 9 (Trm9). Modifications at …
Loss Of Bloom Syndrome Protein Causes Destabilization Of Genomic Architecture And Is Complemented By Ectopic Expression Of Escherichia Coli Recg In Human Cells, Michael Wayne Killen
Loss Of Bloom Syndrome Protein Causes Destabilization Of Genomic Architecture And Is Complemented By Ectopic Expression Of Escherichia Coli Recg In Human Cells, Michael Wayne Killen
University of Kentucky Doctoral Dissertations
Genomic instability driven by non-allelic homologous recombination (NAHR) provides a realistic mechanism that could account for the numerous chromosomal abnormalities that are hallmarks of cancer. We recently demonstrated that this type of instability could be assayed by analyzing the copy number variation of the human ribosomal RNA gene clusters (rDNA). Further, we found that gene cluster instability (GCI) was present in greater than 50% of the human cancer samples that were tested. Here, data is presented that confirms this phenomenon in the human GAGE gene cluster of those cancer patients. This adds credence to the hypothesis that NAHR could be …
The Effect Of Rooibos Tea (Aspalathus Linearis) On The Survival And Transformation Of C3h-Bt1 Mouse Fibroblasts, Krista M. Beach, Paul J. Smith
The Effect Of Rooibos Tea (Aspalathus Linearis) On The Survival And Transformation Of C3h-Bt1 Mouse Fibroblasts, Krista M. Beach, Paul J. Smith
Honors Capstones
Capstone submitted as a graduation requirement for the BSU Honors Program.
Tumor Response Tcf-4/Β-Catenin Regulatory Elements For Enhancing Cancer Gene Therapies, Saurabh Kumar Gupta
Tumor Response Tcf-4/Β-Catenin Regulatory Elements For Enhancing Cancer Gene Therapies, Saurabh Kumar Gupta
Theses and Dissertations in Biomedical Sciences
Mutations in the adenomatous polyposis coli gene are frequently associated with progression of colon carcinoma and most other types of epithelial carcinomas. This usually results in stabilization of β-catenin protein levels, followed by transactivation of Tcf-4/β-catenin responsive genes. The effectiveness of a Tcf-4/β-catenin transcriptional enhancer element in combination with a c-fos or carcinoembryonic antigen promoter was tested for its ability to act as a tumor specific regulator of gene expression in a panel of human tumor and normal cell lines. Luciferase reporter assays indicated enhanced activity of the Tcf-4/β-catenin transcriptional element only in tumor cell lines, with minimal activities in …
Cancer Genetic Susceptibility Testing: Ethical And Policy Implications For Future Research And Clinical Practice, Benjamin S. Wilfond, Karen H. Rothenberg, Elizabeth J. Thomson, Caryn Lerman
Cancer Genetic Susceptibility Testing: Ethical And Policy Implications For Future Research And Clinical Practice, Benjamin S. Wilfond, Karen H. Rothenberg, Elizabeth J. Thomson, Caryn Lerman
Faculty Scholarship
No abstract provided.
Identification And Characterization Of Genes Associated With V-Jun Induced Cell Transformation, Martin Toralballa Hadman
Identification And Characterization Of Genes Associated With V-Jun Induced Cell Transformation, Martin Toralballa Hadman
Biological Sciences Theses & Dissertations
The v-jun oncogene was initially identified as the causative agent for fibrosarcomas in chickens. Studies show that overexpression of v-Jun proteins transforms chicken embryo fibroblasts (CEF) in vitro, and forms tumors in chickens in vivo. The mechanisms for this are not clearly defined. Conceivably, overexpression of an unregulated transcription factor would cause cell transfonnation by illicit regulation of its target genes. In support of this, we show that in vivo v-Jun complexes exhibit differential binding to in vitro generated AP-1 and 'AP-1 like' target sequences, suggesting that the pattern of target gene expression is altered during cell transformation. …