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Biochemistry, Biophysics, and Structural Biology Commons™
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- Alpha helical proteins (1)
- Apoptosis (1)
- Bioavailability (1)
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- DFT (1)
- Death domain superfamily (1)
- Dielectric spectroscopy (1)
- Ebselen (1)
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- Greek-key topology (1)
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Articles 1 - 5 of 5
Full-Text Articles in Biochemistry, Biophysics, and Structural Biology
Altering Nitric Oxide Bioavailability And Lipid Profiles In Endothelial Cells By Polycyclic Aromatic Hydrocarbons In Particulate Matter, Liang Yu
Theses and Dissertations in Biomedical Sciences
Epidemiologic studies have demonstrated a significant association between exposure to particulate matter (PM) and atherosclerosis. Polycyclic aromatic hydrocarbons (PAHs) present in particulate matter, are well known to induce oxidative stress and lipid peroxidation via generation of reactive oxygen species (ROS). Lipid peroxidation involves regulating endothelial nitric oxide synthase via inhibition of its activity, and as a result, mediates dilation of coronary arterioles is involved with the pathogenesis of atherosclerosis. However, data on assessment of oxidized lipid formation is limited due to low resolution of mass spectrometer methods. Taking the advantage of a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR-MS) …
Nanosecond Pulsed Electric Field Induction Of Programmed Cell Death Is Cell Type Dependent: An In Vitro Study, Wei Ren
Theses and Dissertations in Biomedical Sciences
Nanosecond pulsed electric fields (nsPEFs) present a novel and effective method for cancer ablation by eradicating the ubiquitous cancer hallmark of apoptosis evasion and enforcing cancer programmed cell death. To develop nsPEFs as an anticancer method, a comprehensive understanding of cell death mechanisms is required. The overall objective of this dissertation is to elucidate molecular mechanisms underlying effects of nsPEFs on E4 murine squamous cell carcinoma and human T-cell Jurkat clones that are wildtype, deficient in FADD (ΔFADD) and deficient in caspase-8 (ACas-8). The overall hypothesis is that nsPEFs eliminate cancer cells through activating caspase-dependent and caspase-independent programmed cell death …
Computational Investigation Of The Bioactive Selenium Compounds Ebselen And Selenious Acid, Sonia Antony
Computational Investigation Of The Bioactive Selenium Compounds Ebselen And Selenious Acid, Sonia Antony
Chemistry & Biochemistry Theses & Dissertations
Selenium, a toxic element, is required in trace quantities for the proper functioning of biological systems. The experimental mechanistic study of the reactions of ebselen and selenious acid is difficult due to complexity of the reaction mixtures and the presence of short-lived intermediates. Computational modeling of the reactivity of these species can give us an insight into their mechanisms, but the process is complicated by proton exchanges associated with the mechanistic steps. In gas phase modeling, this may be corrected to a certain level using the solvent assisted proton exchange (SAPE) method. SAPE is a modeling technique that mimics solvent …
Bioinformatics, Thermodynamics And Kinetics Analysis Of An All Alpha Helical Protein With A Gree-Key Topology, Hai Li
Chemistry & Biochemistry Theses & Dissertations
Computational and experimental studies focusing on the role of conserved residues for folding and stability is an active and promising area of research. To further expand our understanding we present the results of a bioinformatics analysis of the death domain superfamily. The death domain superfamily fold consists of six α-helices arranged in a Greek-key topology, which is shared by the all β-sheet immunoglobulin and mixed α/β-plait superfamilies. Our sequence and structural studies have identified a group of conserved hydrophobic residues and corresponding long-range interactions, which we propose are important in the formation and stabilization of the hydrophobic core and native …
A Microfluidic Device For Impedance Spectroscopy, Ahmet Can Sabuncu
A Microfluidic Device For Impedance Spectroscopy, Ahmet Can Sabuncu
Mechanical & Aerospace Engineering Theses & Dissertations
Recently, microfluidics has become a versatile tool to investigate cellular biology and to build novel biomedical devices. Dielectric spectroscopy, on the other hand, allows non-invasive probing of biological cells. Information on the cell membrane, cytoplasm, and nucleus can be obtained by dielectric spectroscopy provided that appropriate tools are used in specific frequency ranges. This dissertation includes fabrication, characterization, and testing of a simple microfluidic device to measure cell dielectric properties. The dielectric measurements are performed on human T-cell leukemia (Jurkat), mouse melanoma (B16), mouse hepatoma (Hepa), and human costal chondrocyte cells. Dielectric measurements consist of measuring the complex impedance of …