Superoxides
Mostrando 1-8 de 8 artigos, teses e dissertações.
-
1. Papel da dissulfeto isomerase proteica (PDI) na migração de células musculares lisas vasculares: possível envolvimento de Nox1 NADPH oxidase e RhoGTPases / The role of protein disulfide isomerase (PDI) in vascular smooth muscle cell migration: possible interaction with Nox1 NADPH oxidase and RhoGTPases
A migração de células musculares lisas (VSMC) da camada média do vaso para a íntima é essencial para vasculogênese e contribui para o processo de aterosclerose e estenose após lesão por cateter-balão, caracterizando-se como um importante alvo terapêutico. Diversos trabalhos já demonstraram que fatores de crescimento (como PDGF e FGF) estimulam a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/02/2012
-
2. Reduction of molecular oxygen in aqueous solutions through modifying electrodesmethodology / Redução de oxigênio molecular em soluções aquosas através da metodologia de modificação de eletrodos
This work consisted in testing the viability of investigations into the electrochemical generation and identification of free radicals involved in advanced oxidative processes. In these studies, a technique which is rarely used for the electrochemical generation and identification of free radicals at organothiole-modified electrodes, electrochemical impedanc
Publicado em: 2007
-
3. Lipoprotein PsaA in Virulence of Streptococcus pneumoniae: Surface Accessibility and Role in Protection from Superoxide
PsaA of Streptococcus pneumoniae, originally believed to be an adhesin, is the lipoprotein component of an Mn2+ transporter. Mutations in psaA cause deficiencies in growth, virulence, adherence, and the oxidative stress response. Immunofluorescence microscopy shows that PsaA is hidden beneath the cell wall and the polysaccharide capsule and only exposed to a
American Society for Microbiology.
-
4. Role of Mycobacterium tuberculosis Copper-Zinc Superoxide Dismutase
Superoxide dismutases (SODs) play an important role in protection against oxidative stress and have been shown to contribute to the pathogenicity of many bacterial species. To determine the function of the mycobacterial copper and zinc-cofactored SOD (CuZnSOD), we constructed and characterized Mycobacterium tuberculosis and Mycobacterium bovis BCG CuZnSOD nu
American Society for Microbiology.
-
5. Purification and regulatory properties of MarA protein, a transcriptional activator of Escherichia coli multiple antibiotic and superoxide resistance promoters.
Expression of the marA or soxS genes is induced by exposure of Escherichia coli to salicylate or superoxides, respectively. This, in turn, enhances the expression of a common set of promoters (the mar/soxRS regulons), resulting in both multiple antibiotic and superoxide resistance. Since MarA protein is highly homologous to SoxS, and since a MalE-SoxS fusion
-
6. Lack of YggX Results in Chronic Oxidative Stress and Uncovers Subtle Defects in Fe-S Cluster Metabolism in Salmonella enterica
As components involved in Fe-S cluster metabolism are described, the challenge becomes defining the integrated process that occurs in vivo based on the individual functions characterized in vitro. Strains lacking yggX have been used here to mimic chronic oxidative stress and uncover subtle defects in Fe-S cluster metabolism. We describe the in vivo similarit
American Society for Microbiology.
-
7. Influence of pH, Oxygen, and Humic Substances on Ability of Sunlight To Damage Fecal Coliforms in Waste Stabilization Pond Water
Simple beaker experiments established that light damages fecal coliforms in waste stabilization ponds by an oxygen-mediated exogenous photosensitization. Wavelengths of up to 700 nm were able to damage bacteria. The ability of wavelengths of >425 nm to damage fecal coliforms was dependent on the presence of dissolved sensitizers. The sensitizers were ubiquit
-
8. Variable character of O—O and M—O bonding in side-on (η2) 1:1 metal complexes of O2
The structures and the O—O and M—O bonding characters of a series of reported side-on (η2) 1:1 metal complexes of O2 are analyzed by using density functional theory calculations. Comparison of the calculated and experimental systems with respect to O—O bond distance, O—O stretching frequency, and O—O and M—O bond orders provides new insights int
The National Academy of Sciences.