Bacteria
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA964711 | ENA |
REPOSITORIES: ENA
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Project description:The innate immune response is crucial for defense against microbial pathogens. To investigate the molecular choreography of this response, we carried out a systematic examination of the gene expression program in human peripheral blood mononuclear cells responding to bacteria and bacterial products. We found a remarkably stereotyped program of gene expression induced by bacterial lipopolysaccharide and diverse killed bacteria. An intricately choreographed expression program devoted to communication between cells was a prominent feature of the response. Other features suggested a molecular program for commitment of antigen-presenting cells to antigens captured in the context of bacterial infection. Despite the striking similarities, there were qualitative and quantitative differences in the responses to different bacteria. Modulation of this host-response program by bacterial virulence mechanisms was an important source of variation in the response to different bacteria. Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set
2005-11-16 | GSE3611 | GEO
Project description:The innate immune response is crucial for defense against microbial pathogens. To investigate the molecular choreography of this response, we carried out a systematic examination of the gene expression program in human peripheral blood mononuclear cells responding to bacteria and bacterial products. We found a remarkably stereotyped program of gene expression induced by bacterial lipopolysaccharide and diverse killed bacteria. An intricately choreographed expression program devoted to communication between cells was a prominent feature of the response. Other features suggested a molecular program for commitment of antigen-presenting cells to antigens captured in the context of bacterial infection. Despite the striking similarities, there were qualitative and quantitative differences in the responses to different bacteria. Modulation of this host-response program by bacterial virulence mechanisms was an important source of variation in the response to different bacteria. Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Using regression correlation
2005-11-15 | E-GEOD-3611 | biostudies-arrayexpress
Project description:Manufactured nanomaterials (MNMs) are increasingly incorporated into consumer products that are disposed into sewage. In wastewater treatment, MNMs adsorb to activated sludge biomass where they may impact biological wastewater treatment performance, including nutrient removal. Here, we studied MNM effects on bacterial polyhydroxyalkanoate (PHA), specifically polyhydroxybutyrate (PHB), biosynthesis because of its importance to enhanced biological phosphorus (P) removal (EBPR). Activated sludge was sampled from an anoxic selector of a municipal wastewater treatment plant (WWTP), and PHB-containing bacteria were concentrated by density gradient centrifugation. After starvation to decrease intracellular PHB stores, bacteria were nutritionally augmented to promote PHB biosynthesis while being exposed to either MNMs (TiO2 or Ag) or to Ag salts (each at a concentration of 5 mg L-1). Cellular PHB concentration and PhyloChip community composition were analyzed. The final bacterial community composition differed from activated sludge, demonstrating that laboratory enrichment was selective. Still, PHB was synthesized to near-activated sludge levels. Ag salts altered final bacterial communities, although MNMs did not. PHB biosynthesis was diminished with Ag (salt or MNMs), indicating the potential for Ag-MNMs to physiologically impact EBPR through the effects of dissolved Ag ions on PHB producers.
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Project description:Under well-defined laboratory conditions, we grew R. pomeroyi DSS-3 and A. macleodii MIT1002 in batch cultures on a monosaccharide (glucose) and organic acid (acetate), provided either individually or in combination, and all at the same carbon equivalent. This batch culturing approach mimicked bacterial DOC assimilation in short-lived substrate ‘hot spots’, such as those formed by high phytoplankton extracellular release at peak photon availability. Measurements were made of bacterial metabolite uptake, respiration, and biomass accumulation through a growth cycle. Insights into bacterial core metabolism came from gene and protein expression measured at intervals during growth. Curated genome-scale models (flux balance analysis; FBA) were used to explore the metabolic foundation of CO2 production for insights into determinants of BGE and bCUE.
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Project description:Genome sequencing and assembly - library of cultured bacterial species from laboratory mouse gut microbiota from the University of Toronto
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