Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 274 for “"Homologous Recombination"”.
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5-hydroxymethylcytosine and endonuclease G as regulators of homologous recombination
Homologous recombination (HR) is a necessary biological process for all living organisms, and it is especially important for repairing damaged DNA. Improper HR results in DNA damage-related diseases, notably increased likelihood of cancer when HR regulators, such as the human BRCA1 gene, are …
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Telomere Specific Homologous Recombination in the Alternative Lengthening of Telomeres
… suggests that ALT cells maintain telomeres by homologous recombination (Reddel 2003 for Review). Groundbreaking work by Oliver Bechter demonstrated that ALT cells and telomerase-positive cells show no difference in the rate of general HR. This study fundamentally shaped our current concept of …
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EXAMINING THE ROLE OF THE XAB2 PROTEIN IN HOMOLOGOUS RECOMBINATION
… or ionizing radiation. For my thesis, I studied homologous recombination (HR), which has two sub-pathways: Homology Directed Repair (HDR) and Single Strand Annealing (SSA). HDR involves strand invasion of a homologous template to prime DNA synthesis; SSA involves annealing of homologous segments …
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Diverse outcomes of homologous recombination in the human Y chromosome
… evolving Y chromosome sequentially suppressed recombination with the X chromosome. While pseudoautosomal regions in the human Y chromosome still participate regularly in allelic homologous recombination, the male-specific region of the Y (MSY) - the only haploid portion of the nuclear genome - …
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INVESTIGATING THE LINK BETWEEN HOMOLOGOUS RECOMBINATION PROTEIN BRCA2 AND DNA METHYLATION
… normal cells. One such repair mechanism involves homologous recombination (HR) proteins BRCA2 which protects DNA replication intermediates from nuclease-mediated degradation. Emerging evidence demonstrates that HR proteins like BRCA2 co-evolved with the cytosine methylation machinery, suggesting a …
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Clinical Significance of Homologous Recombination Deficiency Score Testing In Endometrial Cancer
<p><strong>Objectives: </strong>Homologous recombination deficiency (HRD) score is related to chemotherapy response in breast and ovarian cancers. The role of HRD is unknown in endometrial cancer. We examined the relationship between HRD score and survival in a cohort of endometrial cancer patients …
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Harnessing mutagenic homologous recombination for in vivo targeted mutagenesis by TaGTEAM
… point mutations occur through error-prone homologous recombination (HR) and depend on resectioning and the error prone polymerase Pol(?). We show that HR is error-prone in this context because of DNA damage checkpoint activation and base pair lesions and use this knowledge to shift the …
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Homologous Recombination Outcomes of Double-Strand Break- initiated Events in Saccharomyces cerevisiae
<p>Homologous recombination (HR) is responsible for repairing otherwise lethal DNA double-strand breaks (DSBs) using a homologous donor template. The work in this dissertation, using the budding yeast Saccharomyces cerevisiae as a model system, focuses on the effect of the initiating DSB and …
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Homologous recombination and directed differentiation in medaka ES cells: Development of vector systems
… fast assay of relative cellular activities for homologous recombination versus random integration. In this system, a cell that has undergone a homologous recombination has red cytoplasm, while cell with a nonhomologous recombination possesses a green nucleus. The roles of important DNA-repairing …
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Characterisation of factors that regulate homologous recombination and antigenic variation in Trypanosoma brucei
… and occur primarily by the recombination of VSG genes, selected from an enormous silent archive, into specialised expression sites. It has been previously shown that such VSG switching is a form of homologous recombination, as mutation of RAD51 and a related gene, RAD51-3, …
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Functional Analysis of the Human SMC5/6 Complex in Homologous Recombination and Telomere Maintenance
… the repair of DNA double-strand breaks (DSBs) by homologous recombination (HR). The SMC1/3 cohesin complex promotes HR by localizing to DSBs where it holds sister chromatids in close proximity to allow HR-induced strand invasion and exchange. The SMC5/6 complex is also required for DNA repair, but …
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Regulation of Rad51D In Homologous Recombination Dna Repair by Alternative Splicing and Ubiquitin Modification
… One of the most critical DNA repair pathways is homologous recombination (HR), which is responsible for error-free repair of DNA double-stranded breaks and interstrand crosslinks. Understanding the processes that regulate HR will provide new insights into carcinogenesis and potentially identify …
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Mitotic homologous recombination at engineered repeats in S. cerevisiae and in novel transgenic mice
Although homologous recombination provides an efficient means for repairing and tolerating DNA damage, mitotic recombination between misaligned sequences can lead to loss of genetic information (e.g. deletions, translocations and loss of heterozygosity). Given that such genetic changes may promote …
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The role of TvTrxR in drug resistance and characterization of TvRad51 in homologous recombination in Trichomonas vaginalis
… Resistance and Characterization of TvRad51 in Homologous Recombination in Trichomonas vaginalis Abstract By Melissa Hopper University of the Pacific 2016 In recent years, prevalence of metronidazole-resistant cases of Trichomonas vaginalis has been on the rise. With nearly 10% of strains …
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The impact of age, exposure and genetics on homologous recombination at the engineered repeat sequence in mice
Mitotic homologous recombination is a critical pathway for the repair of DNA double-strand breaks and broken replication forks. Although homologous recombination is generally error-free, recombination between misaligned sequences can lead to deleterious sequence rearrangements, and conditions that …
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Fluorescent detection of homologous recombination reveals the impact of genetic, physiological, and environmental factors on genomic stability
… cellular toxicity. DSBs are repaired via mitotic homologous recombination (HR), non-homologous end-joining (NHEJ) or microhomology-mediated end-joining (MMEJ). Here we use the Fluorescent Yellow Direct Repeat (FYDR) mouse to examine these pathways. Specifically, we crossed FYDR mice with mice …
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Functional analyses of hTel2 and TRF2 deltaB: Insights Into the Role of a New DNA Damage Pathway and Homologous Recombination in Mammalian Telomere Function
… and phenotypes. TRF2 protects telomeres from non-homologous end joining (NHEJ), possibly through the formation of a t-loop structure. A mutant allele of TRF2, TRF2AB, retained the ability to suppress NHEJ but induced dramatic deletions of telomeric DNA. This catastrophic telomere shortening was …
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Chemosensitization of Hepatocellular Carcinoma to Gemcitabine By Non-Invasive Radiofrequency Field-Induced Hyperthermia
… solid tumors. In this study, we evaluated homologous recombination repair of gemcitabine-stalled replication forks as a potential mechanism contributing to resistance. We also studied the effect of hyperthermia on homologous recombination pathway to explain the previously reported synergy …
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