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Articles 241 - 270 of 303
Full-Text Articles in Microbiology
Reelin Signaling Promotes Radial Glia Maturation And Neurogenesis, Serene Keilani
Reelin Signaling Promotes Radial Glia Maturation And Neurogenesis, Serene Keilani
Electronic Theses and Dissertations
The end of neurogenesis in the human brain is marked by the transformation of the neural progenitors, the radial glial cells, into astrocytes. This event coincides with the reduction of Reelin expression, a glycoprotein that regulates neuronal migration in the cerebral cortex and cerebellum. A recent study showed that the dentate gyrus of the adult reeler mice, with homozygous mutation in the RELIN gene, have reduced neurogenesis relative to the wild type. Based on the above findings, our first hypothesis states that Reelin expression is important for the formation of radial glia and the generation of neurons from the neural …
Vesicle Targeting In Plasmodium Falciparum: The Identification And Molecular Characterization Of Plasmodium Falciparum Family Of Of Snare Proteins, Lawrence Sumanjah Ayong
Vesicle Targeting In Plasmodium Falciparum: The Identification And Molecular Characterization Of Plasmodium Falciparum Family Of Of Snare Proteins, Lawrence Sumanjah Ayong
Electronic Theses and Dissertations
Proteins of the SNARE (Soluble N-ethylmaleimide sensitive factor attachment protein receptor) super-family have been characterized as playing an essential role in vesicle targeting and fusion in all eukaryotes. The intracellular malaria parasite Plasmodium falciparum exhibits an unusual endomembrane system that is characterized by an unstacked Golgi apparatus, a developmentally induced apical complex, and various organellar structures of parasite origin in the infected host cells. How malaria parasites target nuclear-encoded proteins to these novel compartments is a central question in Plasmodium cell biology. Ultrastructural studies elsewhere have implicated the participation of specialized vesicular elements in transport of virulence proteins, including various …
Iron Acquisition In Rhodococcus Erythropolis Strain Igts8: Characterization Of A Mutant Strain That Over Produces Siderophore., Melanie Anne Pratt
Iron Acquisition In Rhodococcus Erythropolis Strain Igts8: Characterization Of A Mutant Strain That Over Produces Siderophore., Melanie Anne Pratt
Electronic Theses and Dissertations
Iron is an essential nutrient for most bacteria because enzymes like nitrate reductase and cytochromes use it as a cofactor. However, in most aerobic, neutral pH environments, iron is essentially insoluble and not easily available for bacteria to use. Many bacteria respond to this problem by releasing small organic compounds called siderophores that bind and effectively solubilize iron so that it can be transported into the cell for growth. The focus of this study was to learn more about the iron acquisition and especially the transport of iron by the soil bacterium Rhodococcus erythropolis. To fulfill this aim, mutant …
Herpes Simplex Virus Glycoprotein D/Host Cell Surface Interaction Stimulates Chlamydia Trachomatis Persistence Via A Novel Pathway., Jennifer Vanover
Herpes Simplex Virus Glycoprotein D/Host Cell Surface Interaction Stimulates Chlamydia Trachomatis Persistence Via A Novel Pathway., Jennifer Vanover
Electronic Theses and Dissertations
When presented with certain unfavorable environmental conditions, C. trachomatis reticulate bodies (RBs) enter into a viable, yet noncultivable state called persistence. Two hallmarks of persistent chlamydiae are swollen, aberrantly shaped RBs, as viewed by transmission electron microscopy and a decrease in infectious progeny. Several models of chlamydial persistence have been described, including interferon-γ (IFN-γ), IFN-α, IFN-β, and tumor necrosis factor-α-exposure and nutrient deprivation. Previously, we established an in vitro co-infection model of two of the most common sexually transmitted pathogens in the United States, C. trachomatis and Herpes Simplex Virus-2 (HSV). Data from this tissue culture model indicate that: i) …
Identification Of Chlamydial Iron-Responsive Proteins During Intracellular Growth., Brian D. Dill
Identification Of Chlamydial Iron-Responsive Proteins During Intracellular Growth., Brian D. Dill
Electronic Theses and Dissertations
Chlamydia trachomatis is an obligate intracellular bacterium and the most prevalent cause of bacterial sexually transmitted disease. Genital chlamydial infections, marked by chronic, intense inflammation, can lead to genital tissue scarring and infertility and is a contributing factor to development of pelvic inflammatory disease and ectopic pregnancy. Iron is required as a cofactor for numerous highly conserved pathways, and nearly all studied organisms rely on iron for growth. In response to iron restriction, the chlamydial developmental cycle arrests at the intracellular reticulate body stage, resulting in a phenomenon termed persistence. Persistence likely plays a role in chlamydial pathogenesis through the …
Antigen Trafficking Within Chlamydia Trachomatis-Infected Polarized Human Endometrial Epithelial Cells., David Kelley Giles
Antigen Trafficking Within Chlamydia Trachomatis-Infected Polarized Human Endometrial Epithelial Cells., David Kelley Giles
Electronic Theses and Dissertations
Chlamydia trachomatis serovars D-K are the leading cause of bacterially-acquired sexually transmitted infections in the United States. As an obligate intracellular pathogen, C. trachomatis infects columnar epithelial cells of the genital mucosae and can cause deleterious sequelae such as pelvic inflammatory disease, infertility, and ectopic pregnancy. Several chlamydial antigens reach the host cell cytosol prior to the natural release of chlamydiae at the end of the developmental cycle. While some of these extra-inclusion antigens traffic to the host cell surface, others remain intracellular where they are proposed to influence vital host cell functions and antigen trafficking and presentation. The research …
Prostasin Is Expressed In Benign Prostatic Hyperplasia And Regulates Cell Proliferation And Invasion Via Inos, Icam-1, And Cycli, Meghan Hatfield
Prostasin Is Expressed In Benign Prostatic Hyperplasia And Regulates Cell Proliferation And Invasion Via Inos, Icam-1, And Cycli, Meghan Hatfield
Electronic Theses and Dissertations
Prostasin is expressed in normal prostate epithelial cells but down-regulated in prostate cancers, while prostasin re-expression in invasive prostate cancer cells reduced invasion. We examined prostasin expression and function in benign prostatic hyperplasia (BPH). We evaluated prostasin expression in 12 BPH specimens by immunohistochemistry, and evaluated the impact of prostasin silencing by siRNA on the expression of the inducible nitric oxide synthase (iNOS), intercellular adhesion molecule-1 (ICAM-1), and cyclin D1, as well as on cell proliferation and invasion, using the BPH-1 human prostate epithelial cell line model. Prostasin expression was localized in the glands of BPH tissues by immunohistochemistry, in …
Role Of Transient Receptor Potential Canonical-6 (Trpc6) Channel In Metastasis Of Glioblastoma Multiforme, Rajarajeshwari Venkataraman
Role Of Transient Receptor Potential Canonical-6 (Trpc6) Channel In Metastasis Of Glioblastoma Multiforme, Rajarajeshwari Venkataraman
Electronic Theses and Dissertations
Glioblastoma multiforme (GBM) is one of the extremely fatal brain tumors. The main reason that makes it so lethal is its capability to invade and spread to other parts of CNS producing secondary tumors. Among other factors hypoxia, reduced oxygen availability, is linked to higher metastatic potential of cancers. Hypoxia causes numerous changes in genome and proteome of the cell. These changes help a normal cell to adapt to nutritional deficiency, but the same changes can increase the malignancy and metastasis in tumor cells. Extensive research by a number of curious scientists reveal that various pathways involving numerous proteins cross-talk …
Evaluation Of The Efficacy Of Chloroplast-Derived Antigensagainst Malaria, Melissa Schreiber
Evaluation Of The Efficacy Of Chloroplast-Derived Antigensagainst Malaria, Melissa Schreiber
Electronic Theses and Dissertations
Malaria is the most prevalent vector-borne parasitic disease worldwide and a major cause of death from infections. There is a great need to develop a low cost vaccine for malaria to control transmission of infection and impact of disease, due to the emergence of anti-malarial resistance. Two leading blood stage malarial vaccine candidates are the apical membrane antigen-1 (AMA-1) and the merozoite surface protein-1 (MSP-1). The aim of this project is to express malarial antigens in tobacco plants via plastid transformation and deliver them by subcutaneous or oral gavage of minimally processed transplastomic tissue to evaluate their efficacy to elicit …
The Structural And Folding Characteristics Of The Plasmid-Encoded Toxin From Enteroaggregative Escherichia Coli, Patricia Scaglione
The Structural And Folding Characteristics Of The Plasmid-Encoded Toxin From Enteroaggregative Escherichia Coli, Patricia Scaglione
Electronic Theses and Dissertations
Plasmid-encoded toxin (Pet) from enteroaggregative Escherichia coli is a member of the autotransporter subfamily termed SPATE (serine protease autotransporters of Enterobacteriaceae). Autotransporters, which are the most common Gram-negative secreted virulence factors, contain three functional domains: an amino terminal leader sequence, a mature protein or passenger domain, and a carboxy-terminal β domain. The leader sequence targets the protein to the periplasmic space and the β domain then forms a β-barrel pore in the outer membrane of the bacterium which allows the passenger domain to enter the external milieu. In some cases the passenger domain is cleaved from the β-barrel at the …
Generation Of Recombinant Mouse Embryonic Stem Cell Lines And Theirapplication For In Vivo Bioluminiscence Imaging In The Heart, Ramana Kammili
Generation Of Recombinant Mouse Embryonic Stem Cell Lines And Theirapplication For In Vivo Bioluminiscence Imaging In The Heart, Ramana Kammili
Electronic Theses and Dissertations
Cardiovascular disease is the major cause of death in the United States, with 80 million people suffering from some form of heart disease each year. One major limitation is the inability of the heart to repair the damaged tissue. Stem cell therapy holds enormous promise to repair and regenerate the damaged myocardium, but there are many technical difficulties that must first be overcome. One such difficulty is the present lack of ability to track and assess transplanted stem cells over time in vivo. The central hypothesis of this thesis is that in vivo bioluminescence imaging is a safe and useful …
The Development Of A "Genetic Eyewitness" Profiling System For Low Template Forensic Specimens: Identification Of Novel Protein, Rna, And Dna Biomarkers, Erin Hanson
Electronic Theses and Dissertations
In many criminal investigations, valuable information regarding the physical appearance of suspected perpetrators or the time and order of events that transpired are provided by eyewitness accounts. However, the information obtained from eyewitnesses is often constrained by human recollection or subjective accounts and provides a biased description of the perpetrator's appearance or an inaccurate time line of events. Additionally, in numerous situations eyewitness accounts may not be available. An increasing reliance therefore is placed on the biological evidence recovered during criminal investigations to act as a silent witness, providing unbiased and scientific information that may aid in the resolution of …
The Endocytic Protein Numb Regulates App Metabolism And Notch Signaling: Implications For Alzheimer's Disease, George Kyriazis
The Endocytic Protein Numb Regulates App Metabolism And Notch Signaling: Implications For Alzheimer's Disease, George Kyriazis
Electronic Theses and Dissertations
Increased production of amyloid beta (A-beta) peptide, via altered proteolytic cleavage of amyloid protein precursor (APP), and abnormalities in neuronal calcium homeostasis play central roles in the pathogenesis of Alzheimer's disease (AD). Notch1, a membrane receptor that controls cell fate decisions during development of the nervous system, has been linked to AD because it is a substrate for the gamma-secretase protein complex in which mutations cause early-onset inherited AD. Numb is an evolutionarily conserved endocytic adapter involved in the internalization of transmembrane receptors. Mammals produce four Numb isoforms that differ in two functional domains, a phosphotyrosine-binding domain (PTB) and a …
The Isolation And Characterization Of The Microbial Flora In The Alimentary Canal Of Gromphadorhina Portentosa Based On Rdna Sequences., Amy Renee Robertson
The Isolation And Characterization Of The Microbial Flora In The Alimentary Canal Of Gromphadorhina Portentosa Based On Rdna Sequences., Amy Renee Robertson
Electronic Theses and Dissertations
Multicellular organisms are not single individuals but carry a complex natural microflora with them. This complex's diversity and function can be considered a distinct ecosystem. Traditional methods of isolation and identification miss >90% of the actual diversity. This study uses the gut microflora of the Madagascar hissing roach, Gromphadorhina portentosa, as a model to examine this ecosystem. Isolated cultured bacteria were used to establish methods for identifying members of the microflora based on ribosomal RNA sequences. Universal primers for Eubacterial, Archaeal, and Eukaryotic 16s/18s rRNA were then used for PCR amplification of total DNA isolated from gut contents. Sequences …
Identification Of Genes Encoding Acyl-Coa Reductases And Aldehyde Reductases In Mycobacterial Genome By Characterization Of The Reductases Expressed In E. Coli, Harminder Singh
Electronic Theses and Dissertations
Mycobacterium tuberculosis has been long known to produce wax esters. However, the enzymes involved in their biosynthesis have not been identified. Here we report the identification of Rv3391 and Rv1543 as genes that encode fatty acyl-CoA reductases and Rv1544 as one that encodes an aldehyde reductase. When expressed in E.coli, the products of Rv3391 and Rv1543 catalyzed reduction of fatty acyl-CoA to fatty alcohol with the corresponding aldehyde as an intermediate with an optimal pH of 7.0. Both enzymes showed a strong preference for NADPH over NADH as a reductant. Apparent Km for NADPH was 38 [micro]M for Rv3391 product …
Correlation Of Rpob Gene Mutation With Clinical Rifabutin And Rifampicin Resistance For Treatment Of Crohn's Disease, Daniel Beckler
Correlation Of Rpob Gene Mutation With Clinical Rifabutin And Rifampicin Resistance For Treatment Of Crohn's Disease, Daniel Beckler
Electronic Theses and Dissertations
Emerging rise in microbial drug resistance and the slow-growing characteristic of some intracellular pathogens such as MAP (Mycobacterium avium subspecies paratuberculosis) strongly urges the need for an effective approach for unconventional drug susceptibility testing. We designed a molecular-based PCR method for the evaluation of rifabutin (RFB) and rifampicin (RIF) resistance based on probable determinant regions within the rpoB gene of MAP, including the 81 bp variable site located between nucleotides 1363 and 1443. The minimum inhibitory concentration (MIC) for RIF was also determined against 10 MAP isolates in attempt to seek correlation with rpoB sequences. We determined that MAP strain …
Mechanism Of Action And Regulation Of Membrane Serine Protease Prostasin In The Prostate And Prostate Cancer, Mengqian Chen
Mechanism Of Action And Regulation Of Membrane Serine Protease Prostasin In The Prostate And Prostate Cancer, Mengqian Chen
Electronic Theses and Dissertations
The glycosylphosphatidylinositol (GPI)-anchored serine protease prostasin (PRSS8) is expressed at the apical membrane surface of epithelial cells and acts as a suppressor of tumor invasion when re-expressed in highly invasive human prostate and breast cancer cell lines. To better understand the molecular mechanisms underlying the anti-invasion phenotype associated with prostasin re-expression in prostate cancer cells, we expressed wild-type human prostasin or a serine active-site mutant prostasin in the PC-3 human prostate carcinoma cells. Molecular changes were measured at the mRNA and the protein levels. The expression of several invasion-promoting molecules is regulated by prostasin re-expression, mediated by a protein-level down-regulation …
A Member Of The Novel Fikk Family Of Plasmodium Falciparum Putative Protein Kinases Exhibits Diacylglycerol Kinase Activity And Is Exported To The Host Erythrocyte, David Floyd Curtis
A Member Of The Novel Fikk Family Of Plasmodium Falciparum Putative Protein Kinases Exhibits Diacylglycerol Kinase Activity And Is Exported To The Host Erythrocyte, David Floyd Curtis
Electronic Theses and Dissertations
Plasmodium falciparum is one of four species known to cause malaria in humans and is the species that is associated with the most virulent form of the disease. Malaria causes nearly two million deaths each year, many of these occurring among children in under-developed countries of the world. One reason for this is the prevalence of drug resistant strains of malaria that mitigate the efficacy of existing drugs. Hence, the identification of a new generation of pharmacological agents for malaria is extremely urgent. The recent identification of a group of novel protein kinases within the Plasmodium falciparum genome has provided …
The Generation And Scavenging Of Radicals Via Cerium And Nanoceria, Eric Glenn Heckert
The Generation And Scavenging Of Radicals Via Cerium And Nanoceria, Eric Glenn Heckert
Electronic Theses and Dissertations
Cerium is the most abundant of the rare earth metals, found on average at a level of 66 parts per million in the earth's crust. The unique redox properties of cerium and cerium oxide nanoparticles have led to its use in a wide variety of industrial and commercial uses such as oxygen sensors, fertilizers and as a catalyst to remove toxic gases in automobile exhaust. The use of cerium has also garnered interest in the nanotechnology field. Nanoceria has been generated in its oxide form as nanoparticles and nanorods. Recently, nanoceria has been shown to protect against oxidative stress in …
Mechanisms Promoting Phosphorylation Of The Nf2 Tumor Suppressor And Its Effects On Schwann Cell Development, Courtney Lynn Thaxton
Mechanisms Promoting Phosphorylation Of The Nf2 Tumor Suppressor And Its Effects On Schwann Cell Development, Courtney Lynn Thaxton
Electronic Theses and Dissertations
Neurofibromatosis type 2 is an autosomal dominant disease characterized by the formation of schwannomas and other peripheral neuropathies. The nf2 gene encodes the protein Schwannomin, or merlin. Schwannomin (Sch) is a membrane-cytoskeletal linking protein that suppresses cell proliferation at high cell density and modulates cell shape. Sch's tumor suppressive activity is regulated by its localization, conformation, and phosphorylation at serine 518 (S518). Sch's localization is dependent on binding the scaffold protein, paxillin. Phosphorylation of Sch at S518 regulates its conformation and tumor suppressor function. In a negative feedback loop, unphosphorylated Sch restricts cell proliferation downstream of Rac and p21-activated kinase …
Physical Characteristics Of An Individual: The Identification Of Biomarkers For Biological Age Determination, Michelle Alvarez
Physical Characteristics Of An Individual: The Identification Of Biomarkers For Biological Age Determination, Michelle Alvarez
Electronic Theses and Dissertations
It is now a matter of routine for the forensic scientist to obtain the genetic profile of an individual from DNA recovered from a biological stain deposited at a crime scene. Potential contributors of the stain must either be known to investigators (i.e. a developed suspect) or the questioned profile must be searched against a database of DNA profiles such as those maintained in the CODIS National DNA database. However, in those instances where there is no developed suspect and no match is obtained after interrogation of appropriate DNA databases, the DNA profile per se presently provides no meaningful information …
Glutamate Excitotoxicity In Epilepsy And Ischemia, Mangala Meenakshi Soundarapandian
Glutamate Excitotoxicity In Epilepsy And Ischemia, Mangala Meenakshi Soundarapandian
Electronic Theses and Dissertations
'Excitotoxicity' represents the excitatory amino acid mediated degeneration of neurons. Glutamate is the major excitatory neurotransmitter in the brain. Glutamate excitotoxicity has been implicated in a number of neurodegenerative disorders like Stroke, Epilepsy, Alzheimer's disease and traumatic brain injury. This neurotoxicity is summed up by the 'glutamate hypothesis' which describes the cause of neuronal cell death as an excessive release of glutamate causing over excitation of the glutamate receptors and subsequent increase in influx of calcium leading to cell death. An effort to counteract this neurotoxicity has lead to the development of glutamate receptor antagonists that can effectively serve as …
Lim Kinase 1 Modulates Expression Of Matrix Metalloproteinases And Associates With Gamma-Tubulin: Dual Role In Invasion And Mito, Tenekua Tapia
Lim Kinase 1 Modulates Expression Of Matrix Metalloproteinases And Associates With Gamma-Tubulin: Dual Role In Invasion And Mito, Tenekua Tapia
Electronic Theses and Dissertations
LIM kinase 1 (LIMK1) is a unique dual specificity serine/threonine kinase containing two N-terminal LIM domains in tandem, a PDZ domain and a C-terminal catalytic domain. LIMK1 is involved in modulation of actin cytoskeleton through inactivating phosphorylation of the ADF (actin depolymerization factor) family protein cofilin. Recent studies have shown that LIMK1 is upregulated in breast and prostate cancer cells and tissues, promotes metastasis in animals and induces acquisition of an invasive phenotype when ectopically expressed in benign prostate epithelial (BPH) cells. Furthermore, overexpression of LIMK1 was associated with altered sub cellular localization of the membrane type 1 matrix metalloprotease …
Helical Packing Regulates Structural Transitions In Bax, Nuska Tschammer
Helical Packing Regulates Structural Transitions In Bax, Nuska Tschammer
Electronic Theses and Dissertations
Apoptosis is essential for development and the maintenance of cellular homeostasis and is frequently dysregulated in disease states. Proteins of the BCL-2 family are key modulators of this process and are thus ideal therapeutic targets. In response to diverse apoptotic stimuli, the pro-apoptotic member of BCL-2 family, BAX, redistributes from the cytosol to the mitochondria or endoplasmic reticulum and primes cells for death. The structural changes that enable this lethal protein to transition from a cytosolic form to a membrane-bound form remain poorly understood. Elucidating this process is a necessary step in the development of BAX as a novel therapeutic …
Retrocyclin Rc-101 Overcomes Cationic Mutations On The Heptad Repeat 2 Of Hiv-1 Gp41, Christopher Fuhrman
Retrocyclin Rc-101 Overcomes Cationic Mutations On The Heptad Repeat 2 Of Hiv-1 Gp41, Christopher Fuhrman
Electronic Theses and Dissertations
Retrocyclin RC-101, a θ-defensin with lectin-like properties, potently inhibits infection by many HIV-1 subtypes by binding to the heptad repeat (HR)-2 region of gp41 and preventing six-helix bundle formation. In the present study, we used in silico computational exploration to identify residues of HR2 that interacted with RC-101 and then analyzed the HIV-1 Sequence Database at LANL for residue variations in the HR1 and HR2 segments that could plausibly impart in vivo resistance. Docking RC-101 to gp41 peptides in silico confirmed its strong preference for HR2 over HR1, and implicated residues crucial for its ability to bind HR2. We mutagenized …
The Effects Of Trivalent Arsenicals And Thioredoxin Reductase Inhibitors On Selenium Metabolism In Lung Cell Culture Models, Sarah Ryann Talbot
The Effects Of Trivalent Arsenicals And Thioredoxin Reductase Inhibitors On Selenium Metabolism In Lung Cell Culture Models, Sarah Ryann Talbot
Electronic Theses and Dissertations
Arsenic exposure, through various routes, is associated with the development of cancer of the skin, lung, liver, kidney, and bladder. Treatment of cells in culture with trivalent arsenicals has been shown to increase reactive oxygen species (ROS). In particular, monomethylarsonous acid (MMAIII), a trivalent metabolite of arsenite, is highly cytotoxic and possibly carcinogenic. Three trivalent arsenicals; arsenite, arsenic trioxide (ATO), and MMAIII, are also known inhibitors of the selenoprotein thioredoxin reductase (TrxR). Selenium, an essential micronutrient in mammals, is needed in the form of selenocysteine for activity of this enzyme and other selenoproteins. TrxR is part of a key component …
Conjugative Transfer Pathways Of High-Level Mupirocin Resistance And Conjugative Transfer Genes In Staphylococcus., Danielle Barnard
Conjugative Transfer Pathways Of High-Level Mupirocin Resistance And Conjugative Transfer Genes In Staphylococcus., Danielle Barnard
Electronic Theses and Dissertations
To combat widespread infections caused by Staphylococcus aureus, mupirocin was introduced at the Veterans Affairs Medical Center, Mountain Home, Tennessee. Soon after introduction, high-level mupirocin-resistance emerged. The rapid emergence was hypothesized to be due to conjugative transfer of the mupA resistance gene from S. epidermidis to S. aureus. Results have shown that transfer of high-level mupirocin-resistance from S. aureus donors commonly occurs. However, transfer from naturally-occurring S. epidermidis donors was not attainable. Staphylococcus epidermidis transconjugants, however, were capable of serving as donors. Further examination of non-transmissibility included PCR analysis of conjugative transfer genes (tra genes) in capable …
The Cost Of Mupirocin Resistance In Staphylococcus., Susan D. Reynolds
The Cost Of Mupirocin Resistance In Staphylococcus., Susan D. Reynolds
Electronic Theses and Dissertations
Control of antibiotic resistance in bacteria is based on the concept that resistance incurs a fitness cost in non-selective conditions. Fitness costs were assessed for low- and high-level mupirocin resistance in locally-derived Staphylococcus aureus and S. epidermidis. Costs of resistance were assessed in pure cultures by comparing growth curve characteristics and in mixed culture as the proportion of resistant cells surviving. Costs were not present in comparisons of growth rates among groups of naturally-occurring isolates from the different resistance categories. However, in S. aureus, growth rates within resistance categories differed by approximately 30 – 90%. Among near-isogenic pairs …
Use Of Cerium Oxide Nanoparticles For Protection Against Radiation-Induced Cell Death, Jimmie Colon
Use Of Cerium Oxide Nanoparticles For Protection Against Radiation-Induced Cell Death, Jimmie Colon
Electronic Theses and Dissertations
The ability of engineered cerium oxide nanoparticles to confer radioprotection was examined. Rat astrocytes were treated with cerium oxide nanoparticles to a final concentration of 10 nanomolar, irradiated with a single 10 Gy dose of ionizing radiation and cell death was evaluated by propidium iodine uptake at 24 and 48 hours after radiation insult. Treatment of rat astrocytes with nanoceria resulted in an approximate 3-fold decrease in radiation induced death. These results suggest that the nanoceria are conferring protection from radiation induced cell death. Further experiments with human cells were conducted. Human normal and tumor cells (MCF-7 and CRL8798) were …
Characterization And Evaluation Of The Immunogenizity Of Chloroplast-Derived 19-Kilodalton C-Terminal Merozoite Surface Antigen 1 (Msp1) Of Plasmodium Yoelii Yoelii, Sushamadevi Kamarajugadda
Characterization And Evaluation Of The Immunogenizity Of Chloroplast-Derived 19-Kilodalton C-Terminal Merozoite Surface Antigen 1 (Msp1) Of Plasmodium Yoelii Yoelii, Sushamadevi Kamarajugadda
Electronic Theses and Dissertations
Malaria is a protozoan disease caused in humans by four different species of the genus Plasmodium (P. falciparum, P. vivax, P. ovale, P. malarie) and in rodents by Plasmodium yoelii yoelii. It has been reported that 1.5 to 3 million deaths occur worldwide due to malaria and the DALY (Daily affected life years) reports about 0.76% of world population affected by the disease in some of the major countries like Africa, Asia, Latin America etc., Due to the development of resistance to drugs by the parasite, there is an urgent need and prime importance for the development of an effective …