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Articles 1 - 30 of 88
Full-Text Articles in Laboratory and Basic Science Research
Dna Base Excision Repair And Double Strand Break Repair In Human Fibroblast, Mingyang Li
Dna Base Excision Repair And Double Strand Break Repair In Human Fibroblast, Mingyang Li
LSU Doctoral Dissertations
In eukaryotes, DNA repair mechanisms detect and repair damaged DNA. DNA damage is primarily caused by a variety of exogenous and endogenous sources. Several types of damage to DNA are repaired by different kinds of DNA repair pathways. This dissertation focused on repair of N-methylpurines (NMPs) and double-strand breaks (DSBs) in human fibroblasts.
NMPs, including N7-methylguanine (7MeG) and N3-methyladenine (3MeA), can be induced by environmental methylating agents (e.g. the soil fumigant methyl bromide), chemotherapeutics (e.g. nitrogen mustards), and natural cellular methyl donors like S-adenosylmethionine. In human cells, NMPs are repaired by the multi-step …
Effect Of Metal Ion Substitution On Electrochemical Properties Of Cobalt Oxide For Energy Applications, Dalal Alqahtani
Effect Of Metal Ion Substitution On Electrochemical Properties Of Cobalt Oxide For Energy Applications, Dalal Alqahtani
Electronic Theses & Dissertations
Metal oxides are being used for various applications, such as batteries, supercapacitors, and catalysts. This research is mainly to produce high-performance energy storage devices capable of working at high temperatures and causing no pollution in the environment. To this end, the effect of metal ion substitution on the electrochemical properties of Co3O4 for energy applications was studied. Different metal oxides, such as FeCo2O4, MnCo2O4, Co3O4, NiCo2O4, CuCo2O4, and ZnCo2O4, were synthesized using a hydrothermal …
Mechanistic Insights Into The Regulation Of Mitochondrial Fission By Cyclin C, Vidyaramanan Ganesan, Katrina F Cooper, Randy Strich
Mechanistic Insights Into The Regulation Of Mitochondrial Fission By Cyclin C, Vidyaramanan Ganesan, Katrina F Cooper, Randy Strich
Rowan-Virtua School of Osteopathic Medicine Faculty Scholarship
Cyclin C is a component of the mediator complex of RNA polymerase II that localizes to the nucleus under normal conditions. In response to stress, cyclin C translocates to the cytosol and mitochondria and mediates stress‐induced mitochondrial fission and apoptosis. The molecular mechanisms by which cyclin C induces mitochondrial fission are unknown. Using in vitro experimental approaches, we sought to investigate the mechanistic basis of cyclin C mediated mitochondrial fission.
The Role Of Mapk And Scf In The Destruction Of Med13 In Cyclin C Mediated Cell Death, David C Stieg, Stephen D Willis, Joseph Scuorzo, Mia Song, Vidyaramanan Ganesan, Randy Strich, Katrina F Cooper
The Role Of Mapk And Scf In The Destruction Of Med13 In Cyclin C Mediated Cell Death, David C Stieg, Stephen D Willis, Joseph Scuorzo, Mia Song, Vidyaramanan Ganesan, Randy Strich, Katrina F Cooper
Rowan-Virtua School of Osteopathic Medicine Faculty Scholarship
In response to stress, the yeast1 and mammalian2 cyclin C translocate from the nucleus to the cytoplasm, where it associates with the GTPase Drp1/Dnm1 to drive mitochondrial fragmentation and apoptosis. Therefore, the decision to release cyclin C represents a key life or death decision. In unstressed cells, the cyclin C‐Cdk8 kinase regulates transcription by associating with the Mediator of RNA polymerase II. We previously reported that the Mediator component Med13 anchors cyclin C in the nucleus3. Loss of Med13 function leads to constitutive cytoplasmic localization of cyclin C, resulting in fragmented mitochondria, hypersensitivity to stress and …
Modification Of The Ribosome As Part Of The Adaptive Response To Oxidative Stress In Yeast, Jessica A Zinskie, Daniel Shedlovskiy, Ethan Gardner, Dimitri G Pestov, Natalia Shcherbik
Modification Of The Ribosome As Part Of The Adaptive Response To Oxidative Stress In Yeast, Jessica A Zinskie, Daniel Shedlovskiy, Ethan Gardner, Dimitri G Pestov, Natalia Shcherbik
Rowan-Virtua School of Osteopathic Medicine Faculty Scholarship
Living organisms are constantly exposed to a variety of environmental and internal stressors tha tare detrimental to their cellular physiology and viability. One such condition, oxidativestress, is caused by abnormal amounts of Reactive Oxygen Species (ROS) that can lead to damage to proteins, nucleic acids, and lipids. Although the mechanisms to neutralize ROS have been widely studied, the understanding of ROS‐mediated signaling for these mechanisms is rather incomplete and sparse. We have uncovered a previously undescribed phenomenon of yeast ribosomes to respond to elevated levels of ROS through a specific endonucleolytic cleavage of the 25S rRNA in the c‐loop of …
Detection Of Duo-Schistosome Infection From Filtered Urine Samples From School Children In Zambia After Mda, Megan J. Hessler, Austin Cyrs, Steven C. Krenzke, El Shaimaa Mahmoud, Chummy Sikasunge, James C. L. Mwansa, Nilanjan Lodh
Detection Of Duo-Schistosome Infection From Filtered Urine Samples From School Children In Zambia After Mda, Megan J. Hessler, Austin Cyrs, Steven C. Krenzke, El Shaimaa Mahmoud, Chummy Sikasunge, James C. L. Mwansa, Nilanjan Lodh
Clinical Lab Sciences Faculty Research and Publications
Schistosomiasis is one of the major Neglected Tropical Diseases (NTDs) in sub-Saharan Africa. In sub-Saharan Africa, two major human schistosome species namely Schistosoma mansoniand S. haematobium often occur sympatrically largely affecting children. Recognizing the public health impact of Schistosomiasis, the World Health Organization (WHO) is urging member states to regularly treat at least 75% and up to 100%, of all school-aged children at risk of morbidity. For control strategies based on targeted mass drug administration (MDA) to succeed it is essential to have a simple and sensitive test for monitoring the success of these interventions. Current available diagnostic …
Aging, Inflammation, And Gut Microbiota In Mice, Jody Demeo
Aging, Inflammation, And Gut Microbiota In Mice, Jody Demeo
Honors Projects
Inflammation and gut microbiota are two areas of study that can be linked to aging in the body. As a person ages, systemic inflammation tends to increase, and changes in microbiota in the gastrointestinal system occur as well.
Zinc Chloride Activates Phospho-Akt And Promotes Chondrocyte Maturation In The Atdc5 Chondrogenic Cell Line, Donya T. Burgess
Zinc Chloride Activates Phospho-Akt And Promotes Chondrocyte Maturation In The Atdc5 Chondrogenic Cell Line, Donya T. Burgess
Seton Hall University Dissertations and Theses (ETDs)
Fracture healing is characterized by inflammation, cartilage formation, bone deposition, and remodeling. Endochondral ossification is an important part of callus formation that relies on the maturation of chondrocytes. Early in their maturation these cells express collagen type II alpha 1 chain (COL2A1) and express collagen type X alpha 1 chain (COL10A1) as they mature further and become hypertrophic chondrocytes. Activation of the insulin pathway is considered a primary factor involved in the initiation of chondrogenesis and its progression during bone healing. Insulin mimetics like zinc chloride (ZnCl2) have been shown to improve bone healing outcomes and enhance bone …
One-Step Hot Formamide Extraction Of Rna From Saccharomyces Cerevisiae, Daniel Shedlovskiy, Natalia Shcherbik, Dimitri G Pestov
One-Step Hot Formamide Extraction Of Rna From Saccharomyces Cerevisiae, Daniel Shedlovskiy, Natalia Shcherbik, Dimitri G Pestov
Rowan-Virtua School of Osteopathic Medicine Faculty Scholarship
Current methods for isolating RNA from budding yeast require lengthy and laborious steps such as freezing and heating with phenol, homogenization with glass beads, or enzymatic digestion of the cell wall. Here, extraction with a solution of formamide and EDTA was adapted to isolate RNA from whole yeast cells through a rapid and easily scalable procedure that does not require mechanical cell lysis, phenol, or enzymes. RNA extracted with formamide-EDTA can be directly loaded on gels for electrophoretic analysis without alcohol precipitation. A simplified protocol for downstream DNase treatment and reverse transcription reaction is also included. The formamide-EDTA extraction of …
Dopamine Levels In The Brain Of Rat Models Of Human Rheumatoid Arthritis, Amelia Stinson
Dopamine Levels In The Brain Of Rat Models Of Human Rheumatoid Arthritis, Amelia Stinson
Theses & Dissertations
Research Focus. Rheumatoid arthritis (RA) is a chronic, debilitating, autoimmune disease that causes the destruction of bone tissue and the articular structures of joints. At least 30% of RA patient populations have cognitive impairment. Acidic dopamine (DA) is the principal neuroimmunotransmitter that links the central nervous system and peripheral nervous system together. The aim of the present study was to determine the levels of DA and its two acidic metabolites: 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in arthritic induced rats, and whether their levels vary across four different parts of the brain: amygdala (AMG), front cerebral cortex (CX), hippocampus …
Surveillance Of Wisconsin Organisms For Trends In Antimicrobial Resistance And Epidemiology (Swotare): Epidemiologic Correlates For 2016 Surveillance Isolates, Erik Munson, Heather Zeman, Erin Hueppchen
Surveillance Of Wisconsin Organisms For Trends In Antimicrobial Resistance And Epidemiology (Swotare): Epidemiologic Correlates For 2016 Surveillance Isolates, Erik Munson, Heather Zeman, Erin Hueppchen
Clinical Lab Sciences Faculty Research and Publications
Background: The Centers for Disease Control and Prevention advocate data collection and monitoring as one facet of a comprehensive approach to combat antimicrobial resistance in the United States. However, a paucity of such data exists at the local/state level for common disease-causing organisms.
Methods: To begin to characterize epidemiologic correlates of antibacterial resistance in Wisconsin, data analyses were performed with respect to isolates in the Surveillance of Wisconsin Organisms for Trends in Antimicrobial Resistance and Epidemiology (SWOTARE) 2016 collection. In addition to submitting isolates of Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, and Streptococcus pneumoniae, participating laboratories were also requested to …
Brain Energy Homeostasis And The Regulation Of N-Acetyl-Aspartate Metabolism In Development And Disease, Samantha Zaroff
Brain Energy Homeostasis And The Regulation Of N-Acetyl-Aspartate Metabolism In Development And Disease, Samantha Zaroff
Graduate School of Biomedical Sciences Theses and Dissertations
N-acetylaspartate (NAA) is a non-invasive clinical marker of neuronal metabolic integrity because of its strong proton magnetic resonance spectroscopy (H-MRS) peak and direct correlation with energetic integrity. Specifically, NAA is used to track the progression of neurodegenerative diseases due to the characteristic reduction of whole brain levels of NAA which occur simultaneously with reduced glucose utilization and mitochondrial dysfunction, but prior to the onset of disease specific pathology. However, NAA will also significantly increase simultaneously with energetic integrity during periods of recovery or remission in applicable disorders, such as traumatic brain injuries. Unfortunately, it remains enigmatic exactly why NAA is …
Characterization Of Notch1 And Pi3k-Pten-Akt/Mtor Pathway Interaction In Head And Neck Squamous Cell Carcinoma, Kyriante' Henry
Characterization Of Notch1 And Pi3k-Pten-Akt/Mtor Pathway Interaction In Head And Neck Squamous Cell Carcinoma, Kyriante' Henry
Dissertations & Theses (Open Access)
Head and neck squamous cell carcinoma (HNSCC) affects various mucosal sites of the upper aerodigestive tract, including the nasal and oral cavities, the nasopharynx, and the oropharynx. More than five hundred thousand new cases of HNSCC occurred in 2011 alone, with 50,000 reported cases in the United States. This trend made HNSCC the seventh most common non-skin cancer worldwide (Ferlay et al., 2015). Although significant epidemiological and pathological advancements have been made, survival rates have not improved much over the last 40 years, leaving a mortality rate that remains at approximately 50%. An unbiased drug screen demonstrated that HNSCC cell …
Testing Vert™ Accelerometer To Identify Validity And Reliability When Compared To Switch Mat, Tara Mcdonald
Testing Vert™ Accelerometer To Identify Validity And Reliability When Compared To Switch Mat, Tara Mcdonald
Undergraduate Honors Theses
This present study was intended to identify the reliability and validity of the Vert™ device when compared to a Switch mat. Vert is a wireless device intended to measure jump count and jump height through an application on a smartphone or tablet and the Switch mat provides jump height using wireless sensors. Jump height is an important factor in many sports such as volleyball and basketball and it is important to have devices that coaches and trainers can use for testing that they can rely on. If this device is found to be valid and reliable, coaches and trainers …
Exogenous Ubiquitin: Role In Myocardial Inflammation And Remodeling Post- Ischemia/Reperfusion Injury, Stephanie Scofield
Exogenous Ubiquitin: Role In Myocardial Inflammation And Remodeling Post- Ischemia/Reperfusion Injury, Stephanie Scofield
Electronic Theses and Dissertations
Sympathetic stimulation occurs in the heart after injuries such as ischemia/reperfusion (I/R) and myocardial infarction and affects myocardial remodeling. Prolonged sympathetic stimulation can result in myocardial dysfunction through its effects on cardiac myocyte apoptosis and myocardial fibrosis. Ubiquitin (UB) is well known for its role of tagging old or damaged proteins for degradation via the UB-proteosome pathway. The role of exogenous UB however, is not fully understood. Previously, our lab showed that β-adrenergic receptor (β-AR) stimulation increased levels of extracellular UB in the conditioned media of adult rat ventricular myocytes and that UB inhibits β-AR-stimulated apoptosis. This study investigates the …
Intracellular Signaling And Trafficking In Cancer: Role Of Rab5-Gtpase In Migration And Invasion Of Breast Cells, Nicole Porther
Intracellular Signaling And Trafficking In Cancer: Role Of Rab5-Gtpase In Migration And Invasion Of Breast Cells, Nicole Porther
Nicole Porther
Metastasis is characterized pathologically by uncontrolled cell invasion, proliferation, migration and angiogenesis. Steroid hormones, such as estrogen, and growth factors, which include insulin growth factor I/II (IGF-1/IGF-2) therapy has been associated with most if not all of the features of metastasis. It has been determined that IGF-1 increases cell survival of cancer cells and potentiate the effect of E2 and other ligand growth factors on breast cancer cells. However not much information is available that comprehensively expounds on the roles of insulin growth factor receptor (IGFR) and Rab GTPases may play in breast cancer. The latter, Rab GTPases, are small …
Neuronal Degeneration And Short-Term Memory Impairment After Tbi, Obiamaraije Igwe
Neuronal Degeneration And Short-Term Memory Impairment After Tbi, Obiamaraije Igwe
Posters-at-the-Capitol
Traumatic brain injury (TBI) was associated with impaired short-term memory with causes of vehicle accidents and falls. Protein plaques containing fibrinogen (Fg), are associated with memory loss. After TBI, Fg in blood was higher than normal (>~2 mg/ml), which resulted in increased Fg in extravascular space. Therefore, Fg bonded to its endothelial receptor intercellular adhesion molecule-1 (ICAM-1). Fg then interacted with cellular prion protein (PrPC), which had a strong effect on the loss of memory and cognition. Mechanisms of Fg and PrPC complex formation and its functional implication are not known. This present study tested the level of Fg-PrPC …
Answer To November Photo Quiz: Campylobacter Jejuni Pleuritis, Robin Olson, Kimber L. Munson, Maureen Napierala, Erik Munson
Answer To November Photo Quiz: Campylobacter Jejuni Pleuritis, Robin Olson, Kimber L. Munson, Maureen Napierala, Erik Munson
Clinical Lab Sciences Faculty Research and Publications
No abstract provided.
Photo Quiz: A 69-Year-Old Immunosuppressed Male With Chest Pain And Shortness Of Breath, Robin Olson, Kimber L. Munson, Maureen Napierala, Erik Munson
Photo Quiz: A 69-Year-Old Immunosuppressed Male With Chest Pain And Shortness Of Breath, Robin Olson, Kimber L. Munson, Maureen Napierala, Erik Munson
Clinical Lab Sciences Faculty Research and Publications
No abstract provided.
A Brief Guide To Striped Bass Ecology & Management In Chesapeake Bay, Mary C. Fabrizio, Troy D. Tuckey, Susanna Musick
A Brief Guide To Striped Bass Ecology & Management In Chesapeake Bay, Mary C. Fabrizio, Troy D. Tuckey, Susanna Musick
Reports
Chesapeake Bay striped bass support important recreational fisheries along the US Atlantic coast; in the late 1970s, the population of striped bass collapsed as a result of overfishing and poor water quality in rivers used for spawning and rear-ing of young. Informed by stock assessments, strict management regulations were enacted in the mid-1980s and early 1990s; these highly effective regulations resulted in the recovery of the population in 1995. A key to the successful recov-ery of the Atlantic coast striped bass was the wide range of ages of spawning females and the associated differences in spawning behavior among ages. Age …
Molecular Diagnostics Update For The Emerging (If Not Already Widespread) Sexually Transmitted Infection Agent Mycoplasma Genitalium: Just About Ready For Prime Time, Munson Erik
Clinical Lab Sciences Faculty Research and Publications
Mycoplasma genitalium is an important and emerging agent of sexually transmitted infection in females and males, carrying the potential for postinfection genital tract sequelae. Past efforts to identify this organism on a routine basis, which were problematic due to the fastidious nature of the bacterium and its antigenic intricacies, have recently become supplemented by molecular diagnostics. A number of these assays are available commercially. This minireview describes the format and performance indices of a number of M. genitalium DNA- and RNA-based amplification assays; many of these assays have contributed to an improved clinical and epidemiologic understanding of this organism.
Characterization Of Different Molecular Markers For Identification Of Salmonella Enterica Serovar Typhi In Pakistani Population, Faizan Muttiullah, Fida Muhammad Khan, Fakhar-I- Abbas, Sabiha Shamim
Characterization Of Different Molecular Markers For Identification Of Salmonella Enterica Serovar Typhi In Pakistani Population, Faizan Muttiullah, Fida Muhammad Khan, Fakhar-I- Abbas, Sabiha Shamim
Journal of Bioresource Management
Typhoid is caused by Salmonella enterica serovar Typhi that is usually diagnosed by using serologic and immuno-chromatographic techniques in developing counties including Pakistan, which is thought to be an unreliable diagnostic method. For accurate diagnosis we used molecular techniques to amplify 204 bp StyR-36 and 498 bp flagellin gene for the identification of Salmonella enterica serovar Typhi. This study was done on 58 individuals diagnosed positive of typhoid via serologic tests and 50 healthy individuals as a control group. Success rate of amplification for flagellin gene was 77.58% while that for StyR-36 gene was 68.97% showing that flagellin gene primer …
Evaluation Of Xpert Mtb/Rif Testing For Rapid Diagnosis Of Childhood Pulmonary Tuberculosis In Children By Xpert Mtb/Rif Testing Of Stool Samples In A Low Resource Setting, Zahra Hasan, Sadia Shakoor, Fehmina Arif, Aisha Mehnaz, Alnoor Akber, Marium Haider, Akber Kanji, Rumina Hasan
Evaluation Of Xpert Mtb/Rif Testing For Rapid Diagnosis Of Childhood Pulmonary Tuberculosis In Children By Xpert Mtb/Rif Testing Of Stool Samples In A Low Resource Setting, Zahra Hasan, Sadia Shakoor, Fehmina Arif, Aisha Mehnaz, Alnoor Akber, Marium Haider, Akber Kanji, Rumina Hasan
Department of Pathology and Laboratory Medicine
Objective: Children with tuberculosis (TB) remain underdiagnosed due to difculty in testing for Mycobacterium tuberculosis (MTB) infection. We evaluated the Xpert MTB/RIF assay for respiratory and stool testing in children for pulmonary TB through a cross-sectional study at tertiary care facilities in Karachi, Pakistan. Fifty children aged 0–15 years screened by a modifed Kenneth-Jones (KJ) score were included. Mycobacterial culture of respiratory samples was the microbiological standard against stool Xpert TB results. All positive TB cases were compared against a treatment response standard (TRS).
Results: Twelve study subjects were diagnosed by Xpert TB and nine by MTB culture. Compared with …
Considering Aspects Of The 3rs Principles Within Experimental Animal Biology, Lynne U. Sneddon, Lewis G. Halsey, Nic R. Bury
Considering Aspects Of The 3rs Principles Within Experimental Animal Biology, Lynne U. Sneddon, Lewis G. Halsey, Nic R. Bury
Biomedical Research and Alternative Methods Collection
The 3Rs – Replacement, Reduction and Refinement – are embedded into the legislation and guidelines governing the ethics of animal use in experiments. Here, we consider the advantages of adopting key aspects of the 3Rs into experimental biology, represented mainly by the fields of animal behaviour, neurobiology, physiology, toxicology and biomechanics. Replacing protected animals with less sentient forms or species, cells, tissues or computer modelling approaches has been broadly successful. However, many studies investigate specific models that exhibit a particular adaptation, or a species that is a target for conservation, such that their replacement is inappropriate. Regardless of the species …
Point Of Care Diagnosis Of Multiple Schistosome Parasites: Species-Specific Dna Detection In Urine By Loop-Mediated Isothermal Amplification (Lamp), Nilanjan Lodh, Kei Mikita, Kwabena M. Bosompem, William K. Anyan, Joseph K. Quartey, Joseph Otchere, Clive J. Shiff
Point Of Care Diagnosis Of Multiple Schistosome Parasites: Species-Specific Dna Detection In Urine By Loop-Mediated Isothermal Amplification (Lamp), Nilanjan Lodh, Kei Mikita, Kwabena M. Bosompem, William K. Anyan, Joseph K. Quartey, Joseph Otchere, Clive J. Shiff
Clinical Lab Sciences Faculty Research and Publications
Schistosomes are easily transmitted and high chance of repeat infection, so if control strategies based on targeted mass drug administration (MDA) are to succeed it is essential to have a test that is sensitive, accurate and simple to use. It is known and regularly demonstrated that praziquantel does not always eliminate an infection so in spite of the successes of control programs a residual of the reservoir survives to re-infect snails. The issue of diagnostic sensitivity becomes more critical in the assessment of program effectiveness. While serology, such as antigen capture tests might improve sensitivity, it has been shown that …
Itraq-Based Proteomics Analysis And Network Integration For Kernel Tissue Development In Maize, Long Zhang, Yongbin Dong, Qilei Wang, Chunguang Du, Wenwei Xiong, Xinyu Li, Sailan Zhu, Yuling Li
Itraq-Based Proteomics Analysis And Network Integration For Kernel Tissue Development In Maize, Long Zhang, Yongbin Dong, Qilei Wang, Chunguang Du, Wenwei Xiong, Xinyu Li, Sailan Zhu, Yuling Li
Department of Biology Faculty Scholarship and Creative Works
Grain weight is one of the most important yield components and a developmentally complex structure comprised of two major compartments (endosperm and pericarp) in maize (Zea mays L.), however, very little is known concerning the coordinated accumulation of the numerous proteins involved. Herein, we used isobaric tags for relative and absolute quantitation (iTRAQ)-based comparative proteomic method to analyze the characteristics of dynamic proteomics for endosperm and pericarp during grain development. Totally, 9539 proteins were identified for both components at four development stages, among which 1401 proteins were non-redundant, 232 proteins were specific in pericarp and 153 proteins were specific in …
Results Of A Local Combination Therapy Antibiogram For Pseudomonas Aeruginosa Isolates: Is Double Worth The Trouble?, Matthew Song, Thomas J. Dilworth, Erik Munson, Jim Davis, Ramy Elshaboury
Results Of A Local Combination Therapy Antibiogram For Pseudomonas Aeruginosa Isolates: Is Double Worth The Trouble?, Matthew Song, Thomas J. Dilworth, Erik Munson, Jim Davis, Ramy Elshaboury
Clinical Lab Sciences Faculty Research and Publications
Purpose:
To determine the frequency at which fluoroquinolones and aminoglycosides demonstrate in vitro activity against non-urinary, non-skin/skin structure Pseudomonas aeruginosa isolates exhibiting decreased susceptibilities to one or more β-lactam agents.
Methods:
β-lactam-non-susceptible P. aeruginosa isolates recovered from blood, bone, lower respiratory tract, pleural fluid, cerebrospinal fluid, or peritoneal fluid cultures between October 2010 and October 2014 were reviewed from four community hospitals within a single health-system. Only the first isolate per patient was included for analysis. The likelihood that each isolate was susceptible to a non-β-lactam antimicrobial was then determined and summarized within a combination antibiogram.
Results:
In total, 179 …
Intracellular Signalling Crosstalk In The Differentiation Of F9 Cells Into Extraembryonic Endoderm, Tina Nicole Cuthbert
Intracellular Signalling Crosstalk In The Differentiation Of F9 Cells Into Extraembryonic Endoderm, Tina Nicole Cuthbert
Electronic Thesis and Dissertation Repository
Mouse F9 cells differentiate into primitive extraembryonic endoderm (PrE) with retinoic acid (RA) treatment, resulting in up-regulation of Gata6, which when translated directly activates Wnt6. Canonical Wnt signalling is required for PrE differentiation, and this, like most developmental processes, requires input from one or more additional pathways, including hedgehog (Hh). The Hh pathway is regulated by GATA6, and crosstalks positively/negatively with Wnt signalling. Ihh up-regulation in F9 cells accompanies PrE induction, but a role for GATA6 or Hh pathway activation in obligatory Wnt/ß-catenin signalling is not known. To address this, I show that RA induces Ihh and altered expression of …
Chaperoning Ef Hands That Shape Calcium Response: Ncald, Hpca And S100b, Jingyi Zhang
Chaperoning Ef Hands That Shape Calcium Response: Ncald, Hpca And S100b, Jingyi Zhang
Graduate School of Biomedical Sciences Theses and Dissertations
All organisms have an internal clock with a defined period between repetitions of activities. The period for circadian clock in human is 24.5 hours, while in mouse and rat, it is 23.5 hours. However, all organisms are forced to be in synchronization with their environment. A major environmental force that resets the internal clock to 24 hours is light. This phenomenon is defined as “light entrainment” or “phase-setting”. It is unclear how this entrainment process occurs. Studies from this laboratory indicate a role for two neuronal calcium sensor proteins: Neurocalcin (NCALD) and S100B. For these two genes, mRNA as …
Molecular Mechanisms Of Dna Replication Initiation In Hpvs With Genetic Variations Leading To Cellular Carcinogenesis, Gulden Yilmaz
Molecular Mechanisms Of Dna Replication Initiation In Hpvs With Genetic Variations Leading To Cellular Carcinogenesis, Gulden Yilmaz
Graduate School of Biomedical Sciences Theses and Dissertations
Human papillomaviruses are a vast family of double-stranded DNA viruses containing non-carcinogenic and carcinogenic types, whose crucial differences remain unknown, except for the difference in the frequency of DNA replication. The human papillomavirus (HPV) E2 protein regulates the initiation of viral DNA replication and transcription. Its recognition and binding to four 12 bp palindromic sequences in the viral origin is essential for its function. Little is known about the DNA binding mechanism of the E2 protein found in HPV types that have low risk for oncogenicity (low-risk) as well as the roles of various elements of the individual binding sites. …