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Articles 1 - 8 of 8
Full-Text Articles in Immunology and Infectious Disease
A Forward Genetic Screen Identifies Factors Associated With Fever Pathogenesis In Plasmodium Falciparum, Phaedra J. Thomas
A Forward Genetic Screen Identifies Factors Associated With Fever Pathogenesis In Plasmodium Falciparum, Phaedra J. Thomas
USF Tampa Graduate Theses and Dissertations
Infectious diseases that spread from person-to-person and continent-to-continent are a cause for concern for any health entity. One such disease is malaria, a mosquito-borne infection instigated by the protozoan parasite, Plasmodium falciparum. Hundreds of millions of people are affected annually and it is responsible for nearly 1 million deaths. It is the most fatal species causing malaria and proliferates in human red blood cells with a life cycle occurring every 48 hours. At this time, the parasite’s late stage form or schizont bursts from the erythrocyte releasing immune-inducing particles and infective forms (merozoites) into the bloodstream. The merozoites go …
Aspirin Triggered Resolution Phase Interaction Product D1: A Novel Treatment For Hyperoxic Acute Lung Injury, Ruan Rollin Cox, Jr.
Aspirin Triggered Resolution Phase Interaction Product D1: A Novel Treatment For Hyperoxic Acute Lung Injury, Ruan Rollin Cox, Jr.
USF Tampa Graduate Theses and Dissertations
Acute Lung injury (ALI) and the more severe acute respiratory distress syndrome (ARDS) are respiratory maladies that present immense clinical challenges. ALI affects 200,000 individuals annually and features a 40% mortality rate. ALI can be initiated by both pathogenic and sterile insults originating locally in the lungs or systemically. While immense research has been poured into this disease in an effort to find a therapeutic strategy, the heterogeneously diffuse nature of the disease has not yielded a cure for the disease. Death from this disease is strongly attributed to reduced gas exchange from a severely compromised alveolar-capillary barrier. The only …
Altered Intraerythrocytic Development Phenotypes Of Artemisinin-Resistant Plasmodium Falciparum Confer A Fitness Advantage, Amanda Hott
USF Tampa Graduate Theses and Dissertations
Resistance to artemisinin combination therapies (ACTs) has emerged in southeast Asia threatening the most widely used treatment against antimalarial-resistant Plasmodium falciparum worldwide. Artemisinin resistance has been associated with a reduced rate of parasite clearance following treatment with an ACT and is attributed to increased survival of ring-stage parasites. Single nucleotide polymorphisms (SNPs) in kelch gene (K13) has been associated with delayed in vivo clearance half-life of artemisinin-resistant P. falciparum and is the only known molecular marker of resistance. The absence of reliable in vitro phenotypes for artemisinin resistance has limited our understanding of the resistance mechanism(s) and fitness costs, therefore …
Efficacy And Resistance Potential Of Jpc-3210 In Plasmodium Falciparum, Siobhan Marie Flaherty
Efficacy And Resistance Potential Of Jpc-3210 In Plasmodium Falciparum, Siobhan Marie Flaherty
USF Tampa Graduate Theses and Dissertations
Combating drug resistant malaria has been historically challenging, and remains so today. Recent reports from Southeast Asia show that Plasmodium falciparum is developing resistance to even our best defenses; artemisinin-based therapies. This development threatens to become a significant challenge in controlling malaria infections worldwide, making research into developing and characterizing new antimalarial drugs increasingly important. The purpose of this study was to characterize the resistance potential of novel antimalarial compound JPC-3210 in vitro using P. falciparum clones. JPC-3210 is a new long acting drug with potential to be used in combination with fast-acting drugs like artemisinins to cure drug resistant …
Mmv Malaria Box Activity Screening In Dormant Plasmodium Falciparum Phenotypes, Sandra Galusic
Mmv Malaria Box Activity Screening In Dormant Plasmodium Falciparum Phenotypes, Sandra Galusic
USF Tampa Graduate Theses and Dissertations
The causative agent of malignant tertian malaria, Plasmodium falciparum undergoes an arrested growth phenotype of its erythrocytic stage when under drug-stress. Recent artemisinin treatment failures seem to be indicative of such induction followed by recrudescence rather than actual therapeutic failure. Likewise, P. vivax hypnozoites are the prototypic dormants and the latent infections for which they are responsible prove most difficult to treat. Dihydroartemisinin, an artemisinin-derivative, can be used to exploit this mechanism by inducing a dormant state in ring-stage P. falciparum parasites and in turn, their recovery may be used as a screening period for compounds that inhibit or foster …
Targeting T-Bet For Prevention Of Graft-Versus-Host Disease And Leukemia Relapse After Allogeneic Hematopoietic Stem Cell Transplantation, Jianing Fu
USF Tampa Graduate Theses and Dissertations
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an effective therapeutic option for many malignant diseases. However, the efficacy of allo-HSCT is limited by the occurrence of destructive graft-versus-host disease (GVHD). Since allogeneic T cells are the driving force in the development of GVHD, their activation, proliferation, and differentiation are key factors to understanding GVHD pathogenesis. On the other hand, antigen-presenting cells (APCs) are essential for allogeneic T-cell priming and the development of GVHD. The T-box transcription factor T-bet is a master regulator for IFN-γ production and Th1 differentiation. T-bet also regulates the functions of APCs including dendritic cells (DCs) and …
Impacts Of Agrochemical Pollution On Aquatic Communities And Human Disease, Neal T. Halstead
Impacts Of Agrochemical Pollution On Aquatic Communities And Human Disease, Neal T. Halstead
USF Tampa Graduate Theses and Dissertations
The global human population is expected to exceed 9 billion individuals by 2050, putting greater strain on the natural resources needed to sustain such a population. To feed this many people, some expect agricultural production will have to double and agrochemical use will have to increase anywhere from two- to five-fold relative to the turn of the century. Although industrial agriculture has provided many benefits to society, it has caused declines in biodiversity, both directly (e.g., through conversion of habitat) and indirectly (e.g., through contamination of adjacent natural habitats). Agricultural activity has also been linked to increased prevalence and intensity …
Development Of Orally Bioavailable 4(1H)-Quinolones And 1,2,3,4-Tetrahydroacridin-9(10H)-Ones With Potent Anti-Malarial Activity, Jordany Richarlson Maignan
Development Of Orally Bioavailable 4(1H)-Quinolones And 1,2,3,4-Tetrahydroacridin-9(10H)-Ones With Potent Anti-Malarial Activity, Jordany Richarlson Maignan
USF Tampa Graduate Theses and Dissertations
Although Malaria rates are on the decline due to the efforts of the World Health Organization and other organizations dedicated to the eradication of this disease, a relaxed attitude towards the development of new antimalarial entities would be flawed. Due to the emergence of resistance in the parasite, the almost 50% world-wide reduction in malarial death rates that have been produced over the past 15 years are threatening to be lost
New drugs are urgently needed and our approach focuses on the re-evaluation and optimization of the historic antimalarial ICI 56,780. Due to its causal prophylactic activity, along with its …