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Articles 1 - 30 of 38
Full-Text Articles in Life Sciences
The Effect Of The Zika Virus On Rna Stress Granule Components, Nina Williams
The Effect Of The Zika Virus On Rna Stress Granule Components, Nina Williams
Biological Sciences
In recent years, Zika virus (ZIKV) has taken over mainstream media. It captivated the world with the images of microcephaly babies born to infected mothers and the appearance of Guillain-Barré syndrome emerging from infected adults. ZIKV is transmitted by the Aedes mosquito. This virus is composed of a single-stranded positive-sense RNA genome that belongs to the Flaviviridae family. Our long-term goal is to understand the mechanisms in which the virus subverts the host organism’s translation machinery by modulation of RNA stress granules (SGs). Stress granules are RNA-protein complexes found in the cytoplasm that form when the cell is exposed to …
Regional Specialization Of The Adult Meninges Supports Different Brain Areas And Alters With Age, Christina Ann Calabrese
Regional Specialization Of The Adult Meninges Supports Different Brain Areas And Alters With Age, Christina Ann Calabrese
Legacy Theses & Dissertations (2009 - 2024)
The meninges comprise three heterogeneous connective tissue coverings, referred to as the dura, arachnoid, and pia mater, which completely envelop the brain and spinal cord. Given the meninges’ vast coverage over the entire CNS and its unique development, I hypothesized that regional leptomeninges (arachnoid and pia mater layers combined) provide specialized support to different brain areas. During development, anterior meninges, overlying the frontal cortex, derive from neural crest cells that are ectodermal in origin. Posterior meninges, overlying the midbrain to the spinal cord, derive from a mesodermal lineage. This difference in lineage and location suggests potential functional differences between the …
The Effects Of Intrahippocampal Estradiol Administration On Spatial Memory And Protein Expression In Rats Fed A High Fat Diet, Lauren M. Maitner
The Effects Of Intrahippocampal Estradiol Administration On Spatial Memory And Protein Expression In Rats Fed A High Fat Diet, Lauren M. Maitner
Biological Sciences
Estradiol acts throughout the body; one key target that expresses large numbers of estradiol receptors is the brain, and specifically the hippocampus. Estradiol can exhibit neuroprotective effects in the brain. However, the set of pathways through which this occurs is not well understood. In vitro work has shown that administration of estradiol to hippocampal neurons inactivates caspase 3, a protease involved in apoptosis and the cleavage of tau. Cleavage of tau results in the formation of neurofibrillary tangles. Together with formation of amyloid-beta plaques, this is one of the hallmarks of Alzheimer’s disease. We tested the hypothesis that administration of …
Development Of A Rapid Small-Scale Purification Method For The Quantitation Of Heparin-Like Glycosaminoglycans From Cell Culture Media, Marina Danielle Infantado
Development Of A Rapid Small-Scale Purification Method For The Quantitation Of Heparin-Like Glycosaminoglycans From Cell Culture Media, Marina Danielle Infantado
Biological Sciences
Heparin is an anticoagulant medicinally used to inhibit blood clotting. It is commonly administered to patients requiring surgery or kidney dialysis. Presently, it is produced from animal tissues, but a recent contamination crisis pointed to the need for a safer source of the drug. Our project seeks to develop a rapid, inexpensive, high-throughput assay to quantitate the production of heparin and other glycosaminoglycans (GAGs) from cultured mammalian cells. In order to quantitate heparin from cell culture media, a purification method is needed to separate GAGs from interfering constituents in the media. We developed a purification protocol that absorbs Pluronic and …
The Role Of Rck/P54 Enzymatic Activity During Hepatitis C Infection, Rachel E. Eager
The Role Of Rck/P54 Enzymatic Activity During Hepatitis C Infection, Rachel E. Eager
Biological Sciences
Hepatitis C virus (HCV) infected 30,500 people in the United States alone in 2014. As a positive-sense single-stranded RNA virus, the HCV genome facilitates translation and replication of the virus within the host cell. During infection, HCV subverts numerous host proteins to aid in viral production. One such protein is DDX6, a DEAD-box helicase that is associated with the decapping complex and microRNA Induced Silencing Complex (miRISC). Previous studies in our lab have shown that DDX6 is required for HCV expression. Specifically, DDX6 modulates the interaction of miR-122 with the HCV 5’ UTR and promotes stability and replication of the …
Effects Of Zinc On Cognition, Anthony Piche
Effects Of Zinc On Cognition, Anthony Piche
Biological Sciences
Insulin resistance is the defining symptom of type 2 diabetes and a key risk factor for Alzheimer’s disease. Work from our lab and others has shown that insulin is a key component of brain pathways mediating cognition; specifically, mechanisms that transduce hippocampal memory processing. In the hippocampus, insulin regulates glucose metabolism through translocation of the glucose transporter GluT4 and modulates several other molecular cascades. Studies where insulin is studied as a cognitive modulator have generally used a formulation that contains zinc to stabilize insulin. However, zinc itself modulates molecular signaling pathways including AKT and GSK3β, which are both downstream of …
One-Step Cellular Micro-Rna Detection With Programmable Dna Nanoswitches, Molly F. Macisaac
One-Step Cellular Micro-Rna Detection With Programmable Dna Nanoswitches, Molly F. Macisaac
Biological Sciences
MicroRNAs play important roles in gene regulation. Additionally, differential expression of specific microRNAs have been correlated with a wide range of diseases. Sensitive and selective detection of microRNAs is thus important for enabling their use as biomarkers, drugs, or drug targets. Current detection techniques such as northern blotting and quantitative real-time PCR require skilled personnel and expensive equipment to execute complex and time consuming assays. Here we develop and validate a one-step, non-enzymatic microRNA detection assay using DNA nanoswitches programmed to recognize and bind a specific microRNA. Binding induces a loop in the structure, allowing the target microRNA to be …
Rapid Evolution Of Sperm Chromatin Remodeling Proteins In Primates, Hanna Catherine Corliss
Rapid Evolution Of Sperm Chromatin Remodeling Proteins In Primates, Hanna Catherine Corliss
Anthropology
Spermatogenesis requires both the remodeling and condensation of chromatin, a process facilitated by the sequential replacement of histones with sperm-specific DNA binding proteins. First, the transition nuclear proteins 1 and 2 (TNP1, TNP2) act to replace the sperm-specific histones, then they are themselves replaced by protamine 1 (PRM1) and, in some species, protamine 2 (PRM2). It has been theorized that changes to these chromatin-remodeling proteins may affect an organism’s sperm formation, and thus reproductive success. While studies have found that PRM1 evolves rapidly, with evidence of positive selection on the human lineage, and that PRM2 has also evolved rapidly in …
Bruton's Tyrosine Kinase Is A Potential Therapeutic Target In Non-Small Cell Lung Cancer Cells, Abdul Manan Sanni-Adam
Bruton's Tyrosine Kinase Is A Potential Therapeutic Target In Non-Small Cell Lung Cancer Cells, Abdul Manan Sanni-Adam
Biological Sciences
No abstract provided.
Differentiation Of Potential False Positives From Human Saliva Using Raman Spectroscopy For Forensic Purposes, Selina Casadei
Differentiation Of Potential False Positives From Human Saliva Using Raman Spectroscopy For Forensic Purposes, Selina Casadei
Legacy Theses & Dissertations (2009 - 2024)
Traces of body fluids can be found at a crime scene. Being able to identify and differentiate the body fluids while preserving DNA is fundamentally important for forensic applications. Saliva is an important body fluid that can be found on bite marks, cigarette butts, and more, being an excellent source for DNA extraction. Current tests for saliva and other body fluids are destructive and body fluid specific, and are prone to false positives. Our laboratory has developed a universal method for identification of all main body fluids; saliva, semen, sweat, peripheral blood, and vaginal fluid, using Raman spectroscopy combined with …
Whole-Canopy Net Ecosystem Exchange And Water Use Efficiency In An Intermittent-Light Environment -- Dynamic Approach, Sergey Nikolayevich Kivalov
Whole-Canopy Net Ecosystem Exchange And Water Use Efficiency In An Intermittent-Light Environment -- Dynamic Approach, Sergey Nikolayevich Kivalov
Legacy Theses & Dissertations (2009 - 2024)
An observed 20-30% increase in forest net ecosystem exchange (NEE) on partly cloudy days is often attributed to there being more uniform canopy illumination by diffuse radiation when clouds are present. However, the sky on such days is typically populated by fair-weather cumulus clouds, bringing dynamically changing shadow-to-light conditions on the order of minutes to the forest, with radiation alternating from 1000 W m^-2 in the clear sky to less than 400 W m^-2 in under-cloud shadows. These dynamically changing conditions cannot be investigated by the conventional time-averaged eddy-covariance flux method, which requires nearly steady-state turbulent conditions over much longer …
Circular Rna : A Review Of History, Diseases, And Diagnostic Potential, Daniel Conley
Circular Rna : A Review Of History, Diseases, And Diagnostic Potential, Daniel Conley
Legacy Theses & Dissertations (2009 - 2024)
Abstract
Modulation Of Cytokine Signaling In Optic Nerve Regeneration In Xenopus Laevis, Rupa Priscilla Choudhary
Modulation Of Cytokine Signaling In Optic Nerve Regeneration In Xenopus Laevis, Rupa Priscilla Choudhary
Legacy Theses & Dissertations (2009 - 2024)
The axons of the optic nerve, like other central nervous system (CNS) axons, tend to lose their capacity to regenerate following an injury in adult amniotes, but these axons are able to regenerate throughout life in anamniotes. In mammals, optic axon regeneration is promoted by inhibiting the increased expression in retinal ganglion cells of a cytokine signaling molecule, Suppressor of Cytokine Signaling 3 (SOCS3), that accompanies injury. In animals capable of regeneration, SOCS3 mRNA expression also increases dramatically in retinal ganglion cells after optic nerve injury, but somehow this increase is insufficient to block regeneration. To gain insights into how …
Mechanistic Analysis Of The Type I-E Crispr-Cas System In Escherichia Coli, Lauren A. Cooper
Mechanistic Analysis Of The Type I-E Crispr-Cas System In Escherichia Coli, Lauren A. Cooper
Legacy Theses & Dissertations (2009 - 2024)
In CRISPR-Cas immunity systems, short CRISPR RNAs (crRNAs) are bound by CRISPR-associated (Cas) proteins, and these complexes target invading nucleic acid molecules for degradation in a process known as interference. In type I CRISPR-Cas systems, the Cas protein complex that binds DNA is known as Cascade. Association of Cascade with target DNA can also lead to acquisition of new immunity elements in a process known as primed adaptation. Here, we assess the specificity determinants for Cascade-DNA interaction, interference, and primed adaptation in vivo, for the type I-E system of Escherichia coli. Remarkably, as few as 5 bp of crRNA-DNA are …
Control Of Striatal Activity By Neuronal Glutamate Transporters, Modhurika De
Control Of Striatal Activity By Neuronal Glutamate Transporters, Modhurika De
Legacy Theses & Dissertations (2009 - 2024)
The basal ganglia are subcortical nuclei that control the execution of learnt motor behaviors and emotions. The striatum, the main output nucleus of the basal ganglia, receives glutamatergic inputs from the cortex and thalamus and sends GABAergic inputs to the sub-thalamic nucleus via the axonal projections of D1- and D2-receptor (D1R and D2R) expressing medium spiny neurons (D1- and D2-MSNs, respectively). The dorsolateral striatum (DLS) is mainly involved in movement execution, whereas the ventromedial striatum (VMS) regulates emotions. Excitatory inputs onto D1- and D2-MSNs are mediated by post-synaptic ionotropic (GluA, GluN) and metabotropic glutamate receptors (mGluRI). The diffusion distance of …
Investigation Of The Ms2 Bacteriophage Capsid As An Mri-Capable, Brain-Targeted Nanoparticle Platform, Stephanie M. Curley
Investigation Of The Ms2 Bacteriophage Capsid As An Mri-Capable, Brain-Targeted Nanoparticle Platform, Stephanie M. Curley
Legacy Theses & Dissertations (2009 - 2024)
Novel methods are needed to traverse the blood-brain barrier (BBB) and deliver drugs to specific targets in the brain. To this end, MS2 bacteriophage was explored as a multifunctional transport and targeting vector. The MS2 capsid exterior was modified with two different targeting moieties for delivery across the BBB and targeting specific regions of interest in the brain. Successful modification of MS2 capsids with a brain targeting peptide and NMDAR2D-targeting antibody was confirmed by immunoblotting and fluorescence detection. To measure transport efficiency of MS2 particles across an in vitro BBB model, a highly sensitive RT-qPCR protocol was developed and implemented. …
Retinoic Acid Receptor Isoform-Specific Control Of Mouse Salivary Gland Development And Regeneration, Kara Desantis
Retinoic Acid Receptor Isoform-Specific Control Of Mouse Salivary Gland Development And Regeneration, Kara Desantis
Legacy Theses & Dissertations (2009 - 2024)
Controlled expansion and differentiation of progenitor cell populations is essential for organogenesis followed by continued maintenance of the population into and through adulthood. As the K5+ basal cell population is regulated by retinoic acid signaling, we interrogated the contribution of specific RAR isoforms to the regulation of these cells during submandibular salivary gland (SMG) organogenesis and regeneration. Retinoic acid has previously been shown to be involved in the development of the salivary gland, and recently, lack of retinoid signaling has been shown to impact the K5+ population of basal progenitor cells. Since retinoic acid is known to exert stimulatory effects …
The Influence Of Submandibular Salivary Gland Mesenchyme On The Proacinar Epithelial Cell Phenotype, Zeinab Farajallah Hosseini
The Influence Of Submandibular Salivary Gland Mesenchyme On The Proacinar Epithelial Cell Phenotype, Zeinab Farajallah Hosseini
Legacy Theses & Dissertations (2009 - 2024)
Current treatments for patients suffering from salivary hypofunction are insufficient and there is clinical need for regenerating the damaged tissue and restoring function of the gland. Reconstruction of 3D architecture is essential for stimulating secretory differentiation of epithelial progenitor cells in the salivary gland, which involves input from extracellular matrix and basement membrane as well as heterotypic cell interactions. However, the specific requirements for differentiation of secretory progenitor cells in salivary glands remain unclear. To determine what mechanisms and factors are required to promote proacinar differentiation, we isolated primary epithelial cells from embryonic day 16 (E16) submandibular salivary gland (SMG) …
The Development Of Bioaffinity-Based Concepts For On-Site Forensic Analyses : Blood, Sweat, And ... Fingerprints?, Crystal Huynh
The Development Of Bioaffinity-Based Concepts For On-Site Forensic Analyses : Blood, Sweat, And ... Fingerprints?, Crystal Huynh
Legacy Theses & Dissertations (2009 - 2024)
There have been many advances in forensic science over the recent years, but a majority of the tests currently preformed are still heavily reliant upon laboratory-based processes. This means that valuable pieces of information are left unexamined until a crime scene has been completely processed and evidence is moved to a crime lab. In some cases, the evidence may even be left in a queue due to backlogs from previous cases. The delay resulting from the time necessary for crime scene processing and transportation, as well as additional time spent waiting on lab equipment availability, hinders an investigator’s ability to …
Cyclic Adenosine Monophosphate Signaling In Mycobacterium Tuberculosis : New Insights Into A Universal Second Messenger, Richard Mcpherson Johnson
Cyclic Adenosine Monophosphate Signaling In Mycobacterium Tuberculosis : New Insights Into A Universal Second Messenger, Richard Mcpherson Johnson
Legacy Theses & Dissertations (2009 - 2024)
Despite being the focus of intense research for many years Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), remains the deadliest bacterial pathogen plaguing mankind today. Humans are the sole host and reservoir for Mtb, and Mtb has coevolved closely with its human host for thousands of years. Mtb currently infects over two billion people worldwide and over 1.5 million people die from TB each year, arguably making Mtb the most successful bacterial pathogen on the planet.
Regulated Transcriptional Silencing Promotes Germline Stem Cell Differentiation In Drosophila Melanogaster, Pooja Flora
Regulated Transcriptional Silencing Promotes Germline Stem Cell Differentiation In Drosophila Melanogaster, Pooja Flora
Legacy Theses & Dissertations (2009 - 2024)
Germ cells are the only cell in an organism that have the capacity to give rise to a new organism and are passed from one generation to the next. Therefore, to maintain this unique ability of totipotency and immortality, germ cells execute specific functions, such as, repression of a somatic program and contour a germ line-specific pre- and post-transcriptional gene regulatory landscape. In many sexually reproducing organisms, germ cells are formed during the earliest stages of embryogenesis and undergoes several stages of development to eventually get encapsulated by the somatic cells of the gonad. Once, in the gonad, the germ …
Dna Functionalized Nanoparticles In Nanobiosensor And Sensor Array Development For Molecular Diagnostics And In Vitro Identification Of Biomolecules, Mustafa Salih Hizir
Dna Functionalized Nanoparticles In Nanobiosensor And Sensor Array Development For Molecular Diagnostics And In Vitro Identification Of Biomolecules, Mustafa Salih Hizir
Legacy Theses & Dissertations (2009 - 2024)
Nucleic acid technology along with vast variety of nanomaterials has demonstrated a great potential in many applications from biosensing studies to molecular diagnostics, from biomedical and bioanalytical research to environmental analysis. Especially short single stranded (ss) DNA molecules, called oligonucleotides, are extraordinary biopolymers featuring diverse functionality on the nanoparticles thanks to their high degree of programmability, target-specific binding or cleavage, molecular recognition ability, structure-switching capability, and unique interactions at the bio-nano interfaces. Among those, there have been many biosensing applications utilizing ss DNAs and numerous nanomaterials through various detection techniques such as fluorometric, colorimetric or electrochemical methods. Although many groundbreaking …
Heteromeric Assemblies Of Glua3 Flip And Flop Shows Differences In Their Channel Opening Kinetics, Nicholas Karl
Heteromeric Assemblies Of Glua3 Flip And Flop Shows Differences In Their Channel Opening Kinetics, Nicholas Karl
Legacy Theses & Dissertations (2009 - 2024)
Prior studies of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors, including that of GluA3 AMPA receptor subunit, have shown that alternative mRNA splicing, which generates flip and flop variants with different amino acid sequences, gives rise to functional differences between the two variants. The goal of this MS thesis is to investigate the basic gating properties of the heteromeric complex channels formed from GluA2R/GluA3 AMPA receptor subunits and the different variants between the two subunits. The hypothesis to be tested is whether different GluA3 variants affect the channel gating properties when each of the variants is in a complex with the Q/R-site edited …
The Dissemination, Regulatory Role, And Evolution Of Mycobacterial Inteins, Danielle Skye Kelley
The Dissemination, Regulatory Role, And Evolution Of Mycobacterial Inteins, Danielle Skye Kelley
Legacy Theses & Dissertations (2009 - 2024)
Inteins are intervening protein elements, capable of coordinating escape from a host protein through a self-catalyzed mechanism, called protein splicing. This results in free intein and a mature host protein product. Inteins are also mobile elements and many contain homing endonucleases that enable the targeting to ectopic sites and invasion of novel niches. Inteins have been found across all three domains of life and are often present in replication, recombination, and repair proteins. However, it is unclear if the observed distribution is simply a factor of endonuclease preference or if inteins have been selectively maintained due to an adaptation that …
Rack1 Is A Critical Component In Ires-Mediated Translation, Ethan Asher Lafontaine
Rack1 Is A Critical Component In Ires-Mediated Translation, Ethan Asher Lafontaine
Legacy Theses & Dissertations (2009 - 2024)
Due to its sheer number of interacting partners, core ribosomal protein RACK1 is a key player in many cellular processes and has been shown to play a vital role of translation initiation of the Hepatitis C virus RNA. The HCV 5′ untranslated region contains an internal ribosome entry site. IRES-mediated translation is a process employed in eukaryotes by select viruses and some cellular mRNAs by which translation initiation bypasses the canonical mRNA cap-dependent pathway by means of an RNA secondary structure (the IRES). While cap-dependent translation requires the recruitment of a suite of initiation factors, IRES-mediated translation requires few to …
Applying New Methodologies In Assessing Impact Of School Environment On Children's Health And Performance, Yi Lu
Legacy Theses & Dissertations (2009 - 2024)
School-age children spend substantial time at school, a setting that is more vulnerable to environmental problems. School environmental factors, such as indoor air quality (IAQ), has been shown to have a significant impact on students’ health and academic performance. However, several research gaps remain regarding school environmental research. Few studies have assessed both indoor and outdoor school environmental factors and their impact on student’s respiratory health on a large scale. This is partially due to the lack of application of methods able to handle highly correlated variables. Little is known about the potential mediators on the path between the school …
Three Methodological Innovations In Race And Ethnicity Research, Jeffrey Napierala
Three Methodological Innovations In Race And Ethnicity Research, Jeffrey Napierala
Legacy Theses & Dissertations (2009 - 2024)
This dissertation examines topics related to racial and ethnic diversity through three essays. Each essay takes a new perspective on a current issue in the literature and utilizes a unique statistical methodology to address that issue. The first essay uses the Monte Carlo Simulation Method to develop a measure of segregation for the ACS and uses it to assess whether the ACS is useful for measuring segregation in places with different sizes. The second essay considers whether a relatively unexplored factor, genetics, is correlated with migration. This perspective broadens our understanding of why migration occurs and is perpetuated over time. …
Nutrition Transition, Trace Elements In Nails, And Blood Pressure Along The Interoceanic Highway, Madre De Dios, Peru, Stacy M. Pettigrew
Nutrition Transition, Trace Elements In Nails, And Blood Pressure Along The Interoceanic Highway, Madre De Dios, Peru, Stacy M. Pettigrew
Legacy Theses & Dissertations (2009 - 2024)
The paving of the Interoceanic Highway (IOH) brought rapid development to the Madre de Dios (MDD) region in the Peruvian Amazon. Development brings concerns of toxic trace element exposures, and road development has been a major driver of the transition from traditional to calorie-dense processed ‘Western’ diets in lower and middle-income countries. Investigacion de Migracion, Ambiente, y Salud (IMAS) (Investigation of Migration, the Environment, and Health) is the first analysis of health, diet, and integrated toxic trace elements in nails in the region. In 2014 we collected household surveys from 310 households in 46 communities along the IOH and nails …
Factors Associated With Candida Albicans Dissemination Via The Intestinal Mucosa, Emily Rochac Argueta
Factors Associated With Candida Albicans Dissemination Via The Intestinal Mucosa, Emily Rochac Argueta
Legacy Theses & Dissertations (2009 - 2024)
A murine model that established GI colonization of Candida albicans and eventual dissemination was identified to be lacking by Koh and others. Koh’s model specifically employed a tailored combination of neutropenia, intestinal damage, and microbiome dysbiosis that would allow C. albicans to gain an opportunistic advantage. His model provided new opportunities to study the details of C. albicans pathogenesis with a focus on the innate immune mechanisms responsible for controlling C. albicans within the intestinal mucosa. The long-term goal of this research project was to specifically study the factors associated with Candida albicans dissemination via the intestinal mucosa. The model …
Evaluating The Effects Of Vitamin D And Hyaluronic Acid On The Radiation Response Of Normal Mammary Epithelial Cells And Breast Cancer Cells, Lauren Rose-Boehnlein
Evaluating The Effects Of Vitamin D And Hyaluronic Acid On The Radiation Response Of Normal Mammary Epithelial Cells And Breast Cancer Cells, Lauren Rose-Boehnlein
Legacy Theses & Dissertations (2009 - 2024)
Each year over 200,000 American women are diagnosed with breast cancer. Nearly 25% of them are told they have triple negative breast cancer (TNBC), the most aggressive and lethal form, with few targeted treatment options beyond the standard regimen of surgery, chemotherapy, and radiotherapy. Over 40% of TNBC cases overexpress hyaluronan synthase 2 (HAS2), a cell membrane enzyme that synthesizes the extracellular matrix (ECM) polysaccharide hyaluronic acid (HA). HA binds to and activates the cell surface receptor CD44, which is highly enriched on the cell surface of cancer stem cells (CSCs) and has been associated with epithelial to mesenchymal transition …