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Non-Random Snp Formation And Contextual Bias Within Murine And Hominid Genomes, Zackery Ezekiel Plyler Jan 2013

Non-Random Snp Formation And Contextual Bias Within Murine And Hominid Genomes, Zackery Ezekiel Plyler

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Single Nucleotide Polymorphisms (SNPs) are traditionally seen as forming in a stochastic manner, with final distribution ascribed to processes such as purifying natural selection, genetic drift, shift, etc. The present study investigated contextual biases that underlie SNP patterns in 16 distinct murine strains, and tested relevance of these observations to human genomic DNA. We establish stereotypic nucleotide motifs that surround single base replacements in mammalian genes and propose a novel mechanism of SNP regulation. The findings contrast traditional notions in which SNPs occur `randomly' followed by purifying selection or are attributable to more `neutral' (unselected) formation. Instead, we propose that …

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Epigenetic Regulation Of Hippocampus-Dependent Learning, Laura Qadri Jan 2013

Epigenetic Regulation Of Hippocampus-Dependent Learning, Laura Qadri

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Knowledge of the molecular mechanisms that underlie learning and memory has advanced a great deal. Research into the role of epigenetics, or modifications above the genome, has the promise of providing an even greater understanding of the precise mechanisms involved in memory formation. Studies of epigenetic regulation of memory in the rodent hippocampus have primarily focused on associative learning using contextual fear conditioning. While these studies have provided valuable insight into the role that epigenetics plays in cognition, it remains to be seen whether the findings generalize to other forms of hippocampus-dependent learning. This work examines the role of epigenetic …

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Socioeconomic Predictors Of 30-Day Readmission Of Elderly Patients With Initial Discharge Destination Of Home Health Care, Dianne Marrie Richmond Jan 2013

Socioeconomic Predictors Of 30-Day Readmission Of Elderly Patients With Initial Discharge Destination Of Home Health Care, Dianne Marrie Richmond

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Introduction The purpose of this study was to examine the association of social determinants of health with 30-day rehospitalization among elderly patients who were discharged from an acute care hospital with an initial discharge destination of home with home health care support and to explore the social determinants' ability to accurately predict the odds of rehospitalization. Methods A secondary data analysis was performed on data obtained from the home healthcare agency. A total of 4,717 unique patients found in the data set. Some patients were represented in the data more than once during the observation period. To examine the relationship …

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Capturing The Semantics Of Evolving Software Ecosystem Architectures, David E. Robbins Jan 2013

Capturing The Semantics Of Evolving Software Ecosystem Architectures, David E. Robbins

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Current software modeling techniques emphasize the modeling of individual software systems using formal modeling tools, such as the Unified Modeling Language. With recent advances in the conceptualization of software ecosystems, the need for modeling techniques capable of describing the interaction between diverse software systems within the environment in which they are created and used has become apparent. This dissertation presents a semantic framework for the modeling of software ecosystems, including a concept-map based notation. Concretely, this modeling framework comprises a semantic web ontology with three classes and two properties. As validated by application to three app-centric software ecosystem case studies, …

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A Phenomenological Study Of The Lived Experiences Of African American Female School Leaders In Suburban School Districts, Armentress Denise Robinson Jan 2013

A Phenomenological Study Of The Lived Experiences Of African American Female School Leaders In Suburban School Districts, Armentress Denise Robinson

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Abstract The purpose of this phenomenological study was to explore and gain an in-depth understanding of the personal, professional, and sociocultural experiences of African American female school leaders in suburban school districts. These school districts were identified as suburban locations because of low to no student poverty, stellar performances on standardized tests, high graduation and college going rates, and champion academic and athletic team honors. This qualitative study employed a phenomenological design to allow the researcher the opportunity to investigate and gather data through open-ended, face-to-face, one hour interviews with study participants. Three theoretical frameworks--critical race theory, racial identity development …

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Studies Of Dna Gyrase Activity In Escherichia Coli And Salmonella Enterica Serovar Typhimurium., Nikolay Sergeyevich Rovinskiy Jan 2013

Studies Of Dna Gyrase Activity In Escherichia Coli And Salmonella Enterica Serovar Typhimurium., Nikolay Sergeyevich Rovinskiy

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Gyrase introduces negative supercoils into bacterial DNA. In balance with topoisomerase I, it contributes to the maintenance of constant negative DNA supercoiling. It was shown that in Escherichia coli negative supercoil density of pBR322 plasmid is higher than in Salmonella typhimurium. One of the possible explanations of this phenomenon is a difference of DNA gyrase activity between E. coli and S. typhimurium. We developed in vitro assay of gyrase activity which has shown that DNA gyrases of E. coli and S. typhimurium have the same supercoiling end point, but E. coli gyrase works slightly faster than the S. typhimurium enzyme. …

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Role Of Gsk3 In The Immunopathogenesis Of Eae, Amber Rowse Jan 2013

Role Of Gsk3 In The Immunopathogenesis Of Eae, Amber Rowse

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Lithium, a glycogen synthase kinase 3 (GSK3) inhibitor, ameliorates experimental autoimmune encephalomyelitis (EAE), the murine model of multiple sclerosis (MS) in different mouse models. However, the mechanism of lithium's attenuation of EAE and the role of GSK3 in these processes are currently unknown. IFN-g producing Th1 cells and IL-17-producing Th17 cells are both effector cells in MS and in EAE models. However, relapsing remitting MS patients segregate into Th1 or Th17 serum cytokine signatures and each is differentially responsive to IFN-ß therapy, a first line therapy for MS. Studies in this dissertation revealed a differential effect of lithium on Th1 …

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The Relationship Between Inflammatory Biomarkers And Cognitive Function In Older Adults, Andrea C. Sartori Jan 2013

The Relationship Between Inflammatory Biomarkers And Cognitive Function In Older Adults, Andrea C. Sartori

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Recent literature indicates associations between inflammation, aging, and cognitive function. Inflammatory processes have also been implicated in the onset of pathological and neurodegenerative conditions. Current study aims were to examine the associations between inflammatory biomarkers and cognitive function in older adults, and to explore the interrelationships of inflammatory biomarkers, depressive symptoms, health conditions, and cognitive function. Two studies were utilized for the current project: 1) a cross-sectional sample of sedentary older adults aged 65+ from the Physical and Cognitive Exercise Study (PACES; n=54); and 2) a longitudinal study (UAB Study of Aging) of community-dwelling older African Americans and Caucasians (n=393). …

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Role Of Endothelial Mannose Residues In Monocyte Adhesion Under Flow, David Wayne Scott Jan 2013

Role Of Endothelial Mannose Residues In Monocyte Adhesion Under Flow, David Wayne Scott

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Atherosclerosis is a chronic inflammatory disease of the vessel wall and underlying cause of most cardiovascular disease. Much is understood about the nature of atherosclerosis development, including contributions from leukocytes that drive the disease process forward. The general process by which leukocytes are trafficked to sites of atherosclerosis development, and sites of inflammation in general, is understood and relies upon endothelial expressed protein adhesion molecules which serve as ligands for cognate leukocyte receptors. While these adhesion molecules share the post-translation modification of N-glycosylation, relatively little is known as to what functional role these modification plays in: i) interactions of leukocytes …

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Spatial Analysis Of Cardiovascular Mri Data, Samantha Seals Jan 2013

Spatial Analysis Of Cardiovascular Mri Data, Samantha Seals

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The goal of this dissertation is to investigate applying currently available Frequentist spatial analysis methods to cardiovascular MRI (cMRI) data. This data is typically analyzed using methods dependent summary statistics; our goal is to analyze using the full dataset. In our first paper, we explore application of spatial covariance structures to cMRI data via a generalized linear model. In our second paper, we examine the effects of misspecification of the covariance structure when analyzing spatially correlated data utilizing generalized linear models via Monte Carlo simulation. Finally, in our third paper, we propose an alternative family of covariance structures that lends …

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Development And Validation Of A Survey Instrument To Assess Health Information-Seeking Behaviors Among African-Americanyoung Professionals, Shauntice Allen Jan 2013

Development And Validation Of A Survey Instrument To Assess Health Information-Seeking Behaviors Among African-Americanyoung Professionals, Shauntice Allen

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The lay public has had more opportunities than ever before to take an active role in their own health care. Despite these opportunities, many questions remain regarding the basis for barriers relating to seeking preventive health information. Following publication of the report of the Secretary’s Task Force of Black and Minority Health, health education researchers have documented health disparities among populations of color, in particular African Americans (United States Department of Health and Human Services, 1985). Brashers, Goldsmith, and Heish (2002) pointed out the complexity of health information-seeking behaviors (HISB) and highlighted the increasing need to clearly understand the process …

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Microrna Regulation Of Dlx3 During Odontoblast Differentiation, Hannah Maria Heair Jan 2013

Microrna Regulation Of Dlx3 During Odontoblast Differentiation, Hannah Maria Heair

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MicroRNAs are endogenous non-coding RNA (~22nt) that bind to the 3' untranslated region (UTR) of target messenger RNA (mRNA) and facilitate translational repression and degradation. Previous studies have demonstrated the essential role of miRNA in many biological processes, including skeletal development and tooth formation. Dlx3, a homeobox gene, is critical for craniofacial patterning and postnatal skeletal development. Mutations in the Dlx3 gene in humans result in two autosomal dominant phenotypes known as tricho-dento-osseous syndrome (TDO) and amelogenesis imperfecta with taurodontism (AIHHT). Dlx3 expression has been observed in cranial neural crest cells, endochondral osteoblasts, odontoblasts, ameloblasts, hypertrophic chondrocytes, and the developing …

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The Role Of Autosomal Dominant Retinitis Pigmentosa Rhodopsin Mutant Ter349glu In Rod Cell Biogenesis And Retinal Inflammation, Tj Hollingsworth Jan 2013

The Role Of Autosomal Dominant Retinitis Pigmentosa Rhodopsin Mutant Ter349glu In Rod Cell Biogenesis And Retinal Inflammation, Tj Hollingsworth

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Retinitis pigmentosa is one of the most common inherited blinding disorders, affecting 1 in 4000 individuals world-wide. Approximately 30% of retinitis pigmentosa cases are dominantly inherited and approximately 30% of these dominant mutations are found in rhodopsin. Most rhodopsin mutations result in misfolded protein aggregates and subsequent apoptosis while others have been shown to result in apoptosis associated with mislocalization, diminished/enhanced activity, or faulty protein-protein interactions. This work serves to test for mechanisms by which the naturally-occurring Ter349Glu rhodopsin mutation causes rod cell death. Ter349Glu rhodopsin was tested for the ability to bind the ligand 11-cis retinal, photoactivate, and activate …

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Identification And Biochemical Investigations Of Rhamnose And Glycoprotein In Mycoplasmas, David Jordan Jan 2013

Identification And Biochemical Investigations Of Rhamnose And Glycoprotein In Mycoplasmas, David Jordan

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Mycoplasmas are host-specific human and animal pathogens within the class of wall-deficient bacteria named Mollicutes and have smaller sizes and genomes than the walled bacteria. Mycoplasma genome sequences reveal few if any genes for synthesis of a glycocalyx. Nevertheless, we find that mycoplasmas produce glycolipids, glycoprotein, and polysaccharides. Using gas chromatography and mass spectrometry, glucose, mannose, rhamnose, and galactose were detected in the glycolytic species Mycoplasma pneumoniae and Mycoplasma pulmonis. All of these sugars except galactose was found in Mycoplasma arthritidis. Rhamnose was in the rare D configuration in the glycolytic species and in both D and L forms in …

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Modulation Of Intrinsic Activity In Sensory Cortex Facilitates Task Performance, Aburahman Elkhetali Jan 2013

Modulation Of Intrinsic Activity In Sensory Cortex Facilitates Task Performance, Aburahman Elkhetali

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Due to the changing demands of the environment and our behavioral intentions the brain has to adapt in order to produce task appropriate responses. Part of the challenge is the large amount of sensory information received by the brain. Depending on individu-al goals, the brain must select and react to task appropriate stimuli while ignoring other irrelevant sensory input. Since behavioral intentions are dynamic, this requires the re-sponses within the brain to also be dynamic. Cognitive control, exerted by higher centers on sensory cortex allow for selection of task relevant stimuli. In this study we find that intrinsic, non-stimulus driven …

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Characterization Of The Interactions Of Calmodulin With Fas And Death Receptor-5, And Determine The Role Of Calmodulin - Death Receptor-5 Binding In Disc Formation In Breast Cancer., Romone Markel Fancy Jan 2013

Characterization Of The Interactions Of Calmodulin With Fas And Death Receptor-5, And Determine The Role Of Calmodulin - Death Receptor-5 Binding In Disc Formation In Breast Cancer., Romone Markel Fancy

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Breast cancer is one of the most commonly diagnosed cancers. Calmodulin (CaM) is involved in regulating breast cancer growth, proliferation, and transformation to malignancy. CaM has been shown to play a role in regulating Fas and DR-5 mediated apoptosis. The Fas receptor apoptotic pathway has been well characterized in cholangiocarcinoma; however, targeting Fas for anti-cancer therapy has shown hepatotoxicity in vivo. Thus, in vitro studies with breast cancer will focus on the DR-5 mediated apoptotic pathway. Targeting DR-5 to regulate breast cancer apoptosis is a promising strategy for breast cancer treatment. Understanding the mechanism of Fas and DR-5 interaction with …

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Regulation Of Capsule By Cpsa And Global Regulatory Networks In Streptococcus Pneumoniae Type 2, Kanupriya Gupta Jan 2013

Regulation Of Capsule By Cpsa And Global Regulatory Networks In Streptococcus Pneumoniae Type 2, Kanupriya Gupta

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Streptococcus pneumoniae is a major human pathogen that can reside asymptomatically in the nasopharynx before causing invasive disease by entering systemic sites. This involves regulation of colonization and virulence factors including capsule. cps2A, the first gene of the capsule (cps) locus has been proposed to regulate capsule, however its exact role and mechanism is not well understood. A complete deletion of cps2A resulted in enhanced capsule levels, with no alteration in the transcription levels of cps genes. Complementation of Cps2A restored wild type levels of capsule. Expression of the C-terminal tail alone was able to partially complement the deletion strain, …

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Comparison Of The Lenstar Optical Biometer And A-Scan Ultrasonography To Measure Ocular Components, Drew W. Gann Jan 2013

Comparison Of The Lenstar Optical Biometer And A-Scan Ultrasonography To Measure Ocular Components, Drew W. Gann

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The purpose of this study was to compare ocular component dimensions and treated minus control eye differences measured with the Lenstar optical biometer to those measured with A-scan ultrasound in the tree shrew model of refractive development and induced myopia. A-scan ultrasonographic measures (A-scan) were taken with a 15 MHz focused pulser/receiver and compared with measures made with the Lenstar LS900 optical biometer (Haag-Streit, Basel, Switzerland). Anterior segment depth (ASD), lens thickness (LT), vitreous chamber depth (VCD), and axial length (AL) were measured in treated eyes (30), fellow control eyes (30), and normal eyes (86) in tree shrews (n=146), between …

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Potential Roles Of The Immunostimulatory Signals Il-15 And Mica In Oncolytic Hsv-1 Therapy For Malignant Glioma, David Curtis Gaston Jan 2013

Potential Roles Of The Immunostimulatory Signals Il-15 And Mica In Oncolytic Hsv-1 Therapy For Malignant Glioma, David Curtis Gaston

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Malignant gliomas are the most frequently diagnosed and the most fatal primary brain tumors. Innovative therapeutic approaches are necessary to combat these devastating cancers, and oncolytic herpes simplex virus type-1 (oHSV) deleted of the γ134.5 neurovirulence gene is a promising adjunctive therapy. The primary mechanism of tumor clearance by oHSV is lytic replication specifically within malignant cells. oHSV also stimulates tumor infiltration of cytotoxic immune effector cells that can participate in tumor clearance. However, cytotoxic immune cells target oHSV as well as tumor, which may limit therapeutic efficacy. Further knowledge regarding the nature of these interactions and how the interactions …

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Characterization Of Legal Highs And Their Pyrolysis Products, Emily Denise Bouso Jan 2013

Characterization Of Legal Highs And Their Pyrolysis Products, Emily Denise Bouso

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Legal highs are any mind-altering substance produced and sold in a manner to avoid the legal consequences of illicit substances. They have been advertised and sold as Spice, Bath Salts, plant food, and research chemicals. Not only are these drugs presenting major problems to law enforcement, but also to health care providers. The exact composition for many of these substances is not known. Therefore, treatment for patients who have taken these drugs is limited to symptomatic care. Harmful exposure to these substances is not limited to the primary components within the drugs, but can include potentially toxic by-products that result …

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O-Linked Beta-N-Acetylglucosamine (O-Glcnac) And The Mitochondrion, Christopher Calderon Jan 2013

O-Linked Beta-N-Acetylglucosamine (O-Glcnac) And The Mitochondrion, Christopher Calderon

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O-linked beta-N-acetylglucosamine (O-GlcNAc) is a dynamic and ubiquitous posttranslational modification of serine and threonine residues on nuclear and cytoplasmic proteins. O-GlcNAc has emerged as an important regulator of cellular processes such as cell signaling, transcription, translation, apoptosis, and cell cycle regulation, among others. O-GlcNAc is thought to be a contributor to pathologies such as hyperglycemia and insulin resistance. O-GlcNAc has been viewed as an indicator of cellular energy levels and is associated with diabetic complications under nutrient excess. Other studies have shown that a variety of stress stimuli increase the levels of protein O-GlcNAc in mammalian cells, and this increase …

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Reckless Reevaluated: Containment Theory And Its Ability To Explain Desistance Among Serious Adolescent Offenders, Stephanie Michelle Cardwell Jan 2013

Reckless Reevaluated: Containment Theory And Its Ability To Explain Desistance Among Serious Adolescent Offenders, Stephanie Michelle Cardwell

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Social control theorists posit that crime and delinquency occur among members in society because an individuals' behavior is not well regulated. Recent control theories have emphasized the importance of high self-control and strong bonds to society in deterring criminal behavior. However, one of the original theories of self-control has been largely ignored among scholars. Developed by Walter Reckless in the 1960s, containment theory suggests that individuals are pushed and pulled into crime. Pushes are elements that pressure individuals to engage in delinquency while pulls draw individuals away from accepted forms of behavior. The theory states that pushes and pulls are …

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The Flow Of The Social: Developing A Constructal Systemic Approach To The Study Of Health Inequalities, William A. Anderson Jan 2013

The Flow Of The Social: Developing A Constructal Systemic Approach To The Study Of Health Inequalities, William A. Anderson

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Society is a dynamic, living system. People, groups, institutions, and cultures are intricately interconnected. Changes in one area of society create changes in other areas. Causes and results may be closely linked or separated by time and space. Sociologists readily acknowledge this dynamic reality. However, our mainstream theories and methods often fail to account for it. Even after decades of research into social inequalities in health, medical sociology still seems far away from being able to offer any definitive ideas about why such inequalities exist and persist despite efforts to alleviate them. Medical sociology (and sociology in general) is centered …

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The Interactional Effects Of Incentive Value And Task Difficulty: A Partial Explanation For Gender Differences In Cardiovascular Response To A Performance Challange., Patricia Barreto Jan 2013

The Interactional Effects Of Incentive Value And Task Difficulty: A Partial Explanation For Gender Differences In Cardiovascular Response To A Performance Challange., Patricia Barreto

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Participants were presented an impossible or moderately difficult mental addition task; half of them were led to believe that they could win a traditionally masculine incentive by meeting a certain performance standard and half of them were led to believe that they could win a traditionally feminine incentive if they met the same performance standard. In the feminine incentive group, Systolic Blood Pressure (SBP) during the work period was stronger under difficult than impossible conditions among women, but low under both difficulty conditions among men. In the masculine incentive group, blood pressure measures (SBP, diastolic blood pressure, and mean arterial …

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Adapter Based Strategies For Adenovirus Vector Retargeting To T Lymphocytes, Matthew S. Beatty Jan 2013

Adapter Based Strategies For Adenovirus Vector Retargeting To T Lymphocytes, Matthew S. Beatty

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Adenoviruses are the most commonly used gene therapy vector for cancer therapy clinical trials. While adenovirus has shown a great track record in a variety of cancer therapeutics it has not progressed as a vector system for the modification of T lymphocytes. One of the major roadblocks towards utilizing adenovirus for T cell therapy is the lack of coxsackie virus and adenovirus receptor on the cell surface of T cell lineages. Exploitation of alternative receptors has allowed adenovirus vectors to be utilized in a variety of cell types that native adenovirus type 5 cannot infect. Thus, retargeting adenovirus to an …

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In-Vivo Characterization Of Cone Photoreceptor Packing Density With Adaptive Optics Scanning Laser Ophthalmoscopy In Different Racial Groups, Ernesto Blanco Rivero Jan 2013

In-Vivo Characterization Of Cone Photoreceptor Packing Density With Adaptive Optics Scanning Laser Ophthalmoscopy In Different Racial Groups, Ernesto Blanco Rivero

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Cone photoreceptors are one of the two types of essential light sensitive cells that initiate the visual process in the human retina. A normal database of the cone density of healthy eyes may provide an important measure for diagnosing retinal diseases that cause photoreceptor loss, for monitoring disease progression, and for evaluating treatment out-come. Recent studies revealed that the foveal pit morphology, retina thickness, retinal nerve fiber layer (RNFL) thickness, and optic nerve head structure significantly correlated with racial background. We hypothesize that the cone density may be also modified by racial background. To test this hypothesis, I used a …

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Uptake Of Antenatal Care Services And Pregnancy Outcome In Kumasi, Ghana, Asundep Ntui Jan 2013

Uptake Of Antenatal Care Services And Pregnancy Outcome In Kumasi, Ghana, Asundep Ntui

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A prior study reported a 44.6% prevalence of adverse pregnancy outcomes in Kumasi, Ghana. This study investigated factors that may influence antenatal care (ANC) utilization and their association with adverse pregnancy outcomes; defined as low birth weight, stillbirth, preterm delivery or small for gestational age among pregnant women in Kumasi. A quantitative cross sectional study of 643 women, age 19-48 years who presented for delivery at select public hospitals and private traditional birth attendants from July through November 2011 was conducted. Information on socio-demographic characteristics and other factors associated with ANC attendance was collected using a structured questionnaire. Medical and …

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Epigenetic Regulation Of Kir4.1 In Normal And Pathological States: A Focus On Spinal Cord Injury, Sinifunanya Elvee Nwaobi Jan 2013

Epigenetic Regulation Of Kir4.1 In Normal And Pathological States: A Focus On Spinal Cord Injury, Sinifunanya Elvee Nwaobi

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Astrocytes are the most numerous cells in the brain and play a critical role in maintaining homeostatic extracellular potassium ([K+]e). This process is mediated, in part, by a glial-specific, inwardly rectifying potassium channel, Kir4.1. Pharmacological inhibition, knock down, or complete knock out of this channel results in astrocytes with increased membrane resistance, depolarized resting membrane potential, and altered extracellular potassium dynamics. Subsequent to the dysregulation of [K+]e, Kir4.1 knockout (KO) animals suffer from ataxia, seizures, and early postnatal death. Interestingly, Kir4.1 has long been characterized as a seizure susceptibility gene. The importance of Kir4.1 is further underscored by recent studies …

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New Mouse Models To Aid Studies Of The Role Of Primary Cilia In Limb Patterning And Bone Development, Amber Kathleen O'Connor Jan 2013

New Mouse Models To Aid Studies Of The Role Of Primary Cilia In Limb Patterning And Bone Development, Amber Kathleen O'Connor

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Hedgehog (Hh) signaling is required for many developmental processes, and causes several diseases and cancers. Described in chapter one below, vertebrate Hh sig-naling is dependent on the primary cilium (PC), a small organelle that extends from the surface of most mammalian cell types. A better understanding of how the PC modulates Hh signaling is important, as defects in the structure or function of PC result in severe human disorders termed the ciliopathies. For example, patients with Meckel-Gruber Syndrome have extra digits and neural tube defects, which are Hh both related pheno-types. In chapter two we sought to further understand the …

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Obesity, Prediabetes, And Perceived Stress In Municipal Workers, Louise Camilleri O'Keefe Jan 2013

Obesity, Prediabetes, And Perceived Stress In Municipal Workers, Louise Camilleri O'Keefe

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Obesity and diabetes are major contributors to morbidity and mortality in the United States. According to the American Public Health Association and Partnership for Prevention, obesity is growing faster than any other public health problem in the United States. The prevalence of diabetes has also increased significantly with an estimated 79 million Americans aged 20 years or older suffering from prediabetes. Few studies have examined the influence of perceived stress on obesity and prediabetes among working adults. Investigations are needed to examine factors that can contribute to higher health care costs for both employees and employers. The aims of this …

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