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Articles 61 - 74 of 74
Full-Text Articles in Biochemistry, Biophysics, and Structural Biology
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 …
Development Of An Immunoturbidimetric Particle Enhanced Assay For Detection Of C-Reactive Protein, Maria Nicholas
Development Of An Immunoturbidimetric Particle Enhanced Assay For Detection Of C-Reactive Protein, Maria Nicholas
Theses
Background: C-reactive protein (CRP) is a well-known marker for inflammation. Recent studies have demonstrated that increases in CRP concentrations are associated with future coronary events in apparently healthy men and women. The requirement for assays, capable of testing CRP concentrations within the range 1-lOmg/l, is therefore great.
Methods: Two CRP assays were developed. The Sensitive assay is capable of measuring CRP concentrations as low as lmg/l for use as a potential cardiac marker test. The Normal assay can measure concentrations from 5-400mg/l for establishing levels of inflammation. Both assays developed are latex particle enhanced immunoturbidimetric assays designed for use on …
To Establish Accurate Local Adult Reference Ranges For Routine Chemistries In A Large Diagnostic Clinical Biochemistry Laboratory In The Hse South Area, Barbara Kenneally
To Establish Accurate Local Adult Reference Ranges For Routine Chemistries In A Large Diagnostic Clinical Biochemistry Laboratory In The Hse South Area, Barbara Kenneally
Theses
The objectives of this project were:
i. To establish adult reference ranges for routine chemistries quoted in the Clinical Biochemistry Department, Cork University Hospital (CUH), by using samples from blood donors at the local blood bank. 120 samples of blood from male blood donors and 120 samples from female blood donors were collected from the Irish Blood Transfusion Service (Cork). These samples were analysed for 21 routine chemistry analytes, using non-parametric statistics.
ii. To study the statistics of nineteen routine chemistries of the adult population served by the laboratory over a one- month period. Results were collected for each of …
The Influence Of Adenoviral Infection And The Group Via Calcium-Independent Phospholipase A2 On Hepatic Lipid Metabolism, William Palmer Wilkins Iii
The Influence Of Adenoviral Infection And The Group Via Calcium-Independent Phospholipase A2 On Hepatic Lipid Metabolism, William Palmer Wilkins Iii
Theses and Dissertations
Sterol regulatory element-binding proteins (SREBP) are transcription factors that regulate genes involved in lipid metabolism especially in the liver. Therefore, hepatic SREBP is significant regulator of systemic lipid metabolism. Evidence demonstrates that insulin and dietary unsaturated fatty acid (UFA) regulate SREBP1 expression and subsequent SREBP1-mediated gene transcription, events that in many instances result in modulation of systemic fatty acid and triglyceride (TG) homeostasis. A series of investigations was designed to uncover novel regulators of SREBP1. Dietary and exogenous addition of UFA has been shown to regulate SREBP function yet, an endogenous source of UFA capable of modulating SREBP remains elusive. …
Isolation, Characterization, And Degradation Of Bakuchiol From Psoralidium Tenuiflorum, Pei-Jan Hsu
Isolation, Characterization, And Degradation Of Bakuchiol From Psoralidium Tenuiflorum, Pei-Jan Hsu
Theses, Dissertations and Culminating Projects
Bioactivity guided fractionation of the EtOAc extract from Psoralidium tenuiflorum afforded the known compound bakuchiol as a racemic mixture. This compound was purified by liquid-liquid partitions and chromatographic techniques followed by characterization with ]H NMR, 13C NMR, and GCMS which agreed with previous literature. Previously, bakuchiol was reported from Psoralea corylirolia and Posoralea glandulosa in nature which are from the same family as P. tenuiflorum. This compound exhibited Staphylococcus epidermidis cytotoxicity.
Two Dimensional NMR (HHCOSY and HETCOR) of bakuchiol indicated a disagreement with the previously described NMR structural assignment; a reassignment is described herein.
Long-term storage followed by attempted reisolation …
The Biophysical Analysis Of The Human Telomeric Repeat (Ttaggg)4 And Characterization Of Porphyrin Binding In Potassium Solutions, Cosimo Antonacci
The Biophysical Analysis Of The Human Telomeric Repeat (Ttaggg)4 And Characterization Of Porphyrin Binding In Potassium Solutions, Cosimo Antonacci
Seton Hall University Dissertations and Theses (ETDs)
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The Role Of Sphingosine Kinase 2 In Cell Growth And Apoptosis, Heidi M. Sankala
The Role Of Sphingosine Kinase 2 In Cell Growth And Apoptosis, Heidi M. Sankala
Theses and Dissertations
Two isoforms of sphingosine kinase (SphK) catalyze the formation of sphingosine-1-phosphate (SIP). Whereas, SphKl stimulates cell growth and survival, it was found that when overexpressed in mouse NIH 3T3 fibroblasts SphK2 enhances caspase-dependent apoptosis in response to serum deprivation, independently of S1P receptors. Sequence analysis revealed that SphK2 contains a 9 amino acid motif similar to that present in BH3-only proteins. Studies showed that the BH3-only domain, catalytic activity, endoplasmic reticulum (ER) stress, and uptake of calcium by the mitochondria may all contribute to the apoptotic effects of overexpressed SphK2 in NIH 3T3 cells. Further studies in human carcinoma cells …
Role Of Ceramide-1-Phosphate As A Specific And Potent Activator Of Group Iva Cytosolic Phospholipase A2 Alpha, Preeti Subramanian
Role Of Ceramide-1-Phosphate As A Specific And Potent Activator Of Group Iva Cytosolic Phospholipase A2 Alpha, Preeti Subramanian
Theses and Dissertations
Eicosanoids are potent mediators of inflammatory response whose role has been well established in inflammatory disorders. Release of arachidonic acid by group IVA cytosolic phospholipase A2 α (cPLA2α) is the initial rate limiting step for the production of eicosonoids in response to inflammatory mediators. Previous findings from our laboratory have demonstrated that cPLA2α is directly activated by the emerging bioactive sphingolipid, ceramide-1-phosphate (C1P). In this study, we have developed a modified Triton X-100/phosphatidylcholine (PC) mixed micelle assay which was utilized to determine the kinetics and specificity of this lipid-enzyme interaction. Using this assay, the activity of the enzyme increased in …
Detection And Destruction Of Escherichia Coli Bacteria And Bacteriophage Using Biofunctionalized Nanoshells, Joseph E. Van Buren
Detection And Destruction Of Escherichia Coli Bacteria And Bacteriophage Using Biofunctionalized Nanoshells, Joseph E. Van Buren
Browse all Theses and Dissertations
The ability to detect chemical and biological agents is arguably one of the highest priority technical challenges today. The capability to obtain specific information at and near single-molecule resolution is the ultimate goal in chemical and biological agent detection. Metallic nanostructures, nanoshells and nanorods in particular, are attractive substrates because of their plasmonic properties. Combining the specificity of biomolecular recognition with these nanostructures might lead to increased sensitivity and selectivity. Localization of biological recognition motifs to the surface of these nanostructures could provide a mechanism for highly specific and directed energy transfer when bound to its target. This study utilizes …
Vglut And Gad65 Expression In Physiologically Characterized Ia Afferents, Ivonne Nkoli Ukpabi
Vglut And Gad65 Expression In Physiologically Characterized Ia Afferents, Ivonne Nkoli Ukpabi
Browse all Theses and Dissertations
Peripheral nerve injury is known to induce several changes in the physiology and morphology of the injured afferent. These changes include hyperexcitability, decreased dorsal root potentials (DRP), loss of synaptic vesicles as well as loss of the vesicular glutamate transporter, VGLUT1. While many of the changes caused by peripheral injury revert with regeneration, others appear to be permanent. The loss of the stretch reflex for example is a puzzling outcome of recovery after peripheral nerve transection and regeneration, especially given that the electrical counterpart of the stretch reflex (the H-reflex) recovers after regeneration. We hypothesized that stretch induced transmission is …
Differential Effects Of Mutant Tap63Γ On Transactivation Of P53 And/Or P63 Responsive Genes And Their Effects On Global Gene Expression, Shama Khan Khokhar
Differential Effects Of Mutant Tap63Γ On Transactivation Of P53 And/Or P63 Responsive Genes And Their Effects On Global Gene Expression, Shama Khan Khokhar
Browse all Theses and Dissertations
p63, a member of the p53 gene family, known to play a role in development, has more recently also been implicated in cancer progression. Mice lacking p63 exhibit severe developmental defects such as limb truncations, abnormal skin, and absence of hair follicles, teeth, and mammary glands. Germline missense mutations of p63 have been shown to be responsible for several human developmental syndromes including SHFM, EEC and ADULT syndromes and are associated with anomalies in the development of organs of epithelial origin. The contrasting phenotypes associated with the different classes of p63 mutations might be in part due to the differential …
Due-B In Chromatin And Nuclear Speckles, Nadia Katrangi
Due-B In Chromatin And Nuclear Speckles, Nadia Katrangi
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The DNA unwinding element binding protein (DUE-B) was first identified by using a yeast one hybrid screen with the DNA unwinding element (DUE) from the c-myc origin as bait. DUE-B's orthologue in the yeast Saccharomyces cerevisiae lacks the last 60 C-terminal amino acids and has been identified as a D-tyrosyl-tRNA deacylase. A substantial group of evidence suggests a role for DUE-B in the regulation of replication initiation. Here we show that DUE-B is focused in nuclear speckles and colocalizes with spliceosome associated protein 145 (SAP145), an mRNA splicing factor 3B subunit. Mass spectrometry results show that SAP145 co-purifies with the …
Pldb, A Putative Phospholipase D Homologue, Mediates Quorum Sensing In Dictyostelium Discoideum Development, Yi Chen
Dissertations, Theses, and Capstone Projects
Quorum sensing, the ability to measure the local cell density, is required for animal cells to achieve proper cell growth, differentiation and development. However, because of the genetic intractability of mammalian cells, we study quorum sensing in the genetically pliable unicellular eukaryote Dictyostelium discoideum. D. discoideum cells live as individual cells under vegetative conditions. Starvation sets off development to a multicellular organism. But cells won't develop unless enough cells are under starvation conditions. Approximately 105 cells are needed to form a fruiting body, the final stage of the development. When starved, cells are able to calculate the concentration …
A Molecular Study Of The Mitochondrial Genome And Invasions Of The Veined Rapa Whelk, Rapana Venosa, Emily A. Chandler
A Molecular Study Of The Mitochondrial Genome And Invasions Of The Veined Rapa Whelk, Rapana Venosa, Emily A. Chandler
Dissertations, Theses, and Masters Projects
No abstract provided.