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10 resultat
[Effect of the lethal Bacillus anthracis toxin on phagocytosis and the dynamics of the change in the enzyme activity of the antioxidative system of peritoneal mononuclear phagocytes in mice with differing hereditary immunity to anthrax].
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It was demonstrated, that the lethal in vitro suppressed the phagocytic activity of peritoneal mononuclear phagocyte (Mph) and enhanced the level activity of glutathione peroxidase to H2O2 (GP-H2O2) in Mph of resistant to anthrax BALB mice. In Mph BALB the authors observed dependent-dose enhancement
Novel Synthesis of Thiolated Gold Nanoclusters Induced by Lanthanides for Ultrasensitive and Luminescent Detection of the Potential Anthrax Spores' Biomarker
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In this study, we reported a facile, one-pot, and "green" synthesis of glutathione-protected gold nanoclusters (GSH@AuNCs) initiated by samarium (Sm3+) lanthanides for the first time. Sm3+ lanthanides more efficiently induced the formation of GSH@AuNCs with significantly
Role of macrophage oxidative burst in the action of anthrax lethal toxin.
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BACKGROUND
Major symptoms and death from systemic Bacillus anthracis infections are mediated by the action of the pathogen's lethal toxin on host macrophages. High levels of the toxin are cytolytic to macrophages, whereas low levels stimulate these cells to produce cytokines (interleukin-1 beta and
Cellular adaptation to anthrax lethal toxin-induced mitochondrial cholesterol enrichment, hyperpolarization, and reactive oxygen species generation through downregulating MLN64 in macrophages.
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Cellular adaptation to different stresses related to survival and function has been demonstrated in several cell types. Anthrax lethal toxin (LeTx) induces rapid cell death, termed "pyroptosis," by activating NLRP1b/caspase-1 in murine macrophages. We and others (S. D. Ha et al., J. Biol. Chem.
Soluble expression and purification of the anthrax protective antigen in E. coli and identification of a novel dominant-negative mutant N435C.
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The anthrax toxin is an AB-type bacterium toxin composed of the protective antigen (PA) as the cell-binding B component, and the lethal factor (LF) and edema toxin (EF) as the catalytic A components. The PA component is a key factor in anthrax-related research and recombinant PA can be produced in
A recombinant carboxy-terminal domain of the protective antigen of Bacillus anthracis protects mice against anthrax infection.
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The immunogenicity and protective efficacy of overlapping regions of the protective antigen (PA) polypeptide, cloned and expressed as glutathione S-transferase fusion proteins, have been assessed. Results show that protection can be attributed to individual domains and imply that it is domain 4
Bacillus anthracis thioredoxin systems, characterization and role as electron donors for ribonucleotide reductase.
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Bacillus anthracis is the causative agent of anthrax, which is associated with a high mortality rate. Like several medically important bacteria, B. anthracis lacks glutathione but encodes many genes annotated as thioredoxins, thioredoxin reductases, and glutaredoxin-like proteins. We have cloned,
Recombinant Bacillus subtilis expressing the Clostridium perfringens alpha toxoid is a candidate orally delivered vaccine against necrotic enteritis.
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Recombinant Bacillus subtilis endospores have been used to vaccinate against tetanus and anthrax. In this work, we have developed spores that could be used to vaccinate against Clostridium perfringens alpha toxin and that could be used to protect against gas gangrene in humans and necrotic enteritis
Development of high-throughput assay of lethal factor using native substrate.
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The design of inhibitors for anthrax lethal factor (LF) is currently of interest as an approach for the treatment of anthrax because LF plays a major role in the cytotoxicity of target cells. LF is a zinc-dependent metalloprotease that specifically cleaves the mitogen-activated protein kinase kinase
Secreted neutral metalloproteases of Bacillus anthracis as candidate pathogenic factors.
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To evaluate the pathogenic potential of Bacillus anthracis-secreted proteases distinct from lethal toxin, two neutral zinc metalloproteases were purified to apparent homogeneity from the culture supernatant of a non-virulent delta Ames strain (pXO1-, pXO2-). The first (designated Npr599) is a
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