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Transcription profiling by array of Mycobacterium avium subspecies paratuberculosis treated with rhodanine agent D157070

ABSTRACT: Data is also available from BuG@Sbase

INSTRUMENT(S): NanoDrop

ORGANISM(S): Mycobacterium avium

SUBMITTER:

PROVIDER: E-BUGS-92 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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A rhodanine agent active against non-replicating intracellular Mycobacterium avium subspecies paratuberculosis.

Bull Tim J TJ Linedale Richard R Hinds Jason J Hermon-Taylor John J

Gut pathogens 20091223

<h4>Background</h4>Antibiotic therapy targeting chronic mycobacterial disease is often ineffective due to problems with the emergence of drug resistance and non-replicating persistent intracellular antibiotic resistant phenotypes. Strategies which include agents able to enhance host cell killing mechanisms could represent an alternative to conventional methods with the potential for host clearance if active against dormant phenotypes. Investigations of agents with potential activity against non- ...[more]

PMID: 20030828

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Transcription profiling of Mycobacterium avium subspecies paratuberculosis Types I, II and III genomes by pan-genome microarray analysis

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2009-01-16 | E-BUGS-69 | biostudies-arrayexpress

Responses of Staphylococcus aureus exposed to HCl and organic acid stress.

Project description:Staphylococcus aureus is an important food poisoning bacterium. In food preservation, acidification is a well-known method. Permeant weak organic acids, like lactic and acetic acids, are known to be more effective against bacteria than inorganic strong acids (e.g., HCl). Growth experiments and metabolic and transcriptional analyses were used to determine the responses of a food pathogenic S. aureus strain exposed to lactic acid, acetic acid, and HCl at pH 4.5. Lactic and acetic acid stress induced a slower transcriptional response and large variations in growth patterns compared with the responses induced by HCl. In cultures acidified with lactic acid, the pH of the medium gradually increased to 7.5 during growth, while no such increase was observed for bacteria exposed to acetic acid or HCl. Staphylococcus aureus increased the pH in the medium mainly through accumulation of ammonium and the removal of acid groups, resulting in increased production of diacetyl (2,3-butanedione) and pyrazines. The results showed flexible and versatile responses of S. aureus to different types of acid stress. As measured by growth inhibition, permeant organic acid stress introduced severe stress compared with the stress caused by HCl. Cells exposed to lactic acid showed specific mechanisms of action in addition to sharing many of the mechanisms induced by HCl stress. Data is also available from http://bugs.sgul.ac.uk/E-BUGS-87

2011-04-15 | E-BUGS-87 | biostudies-arrayexpress

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Project description:Data is also available from http://bugs.sgul.ac.uk/E-BUGS-77

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Detection of mobile-genetic-element variation between colonizing and infecting hospital-associated methicillin-resistant Staphylococcus aureus isolates.

Project description:Whole-genome analysis by 62-strain microarray showed variation in resistance and virulence genes on mobile genetic elements (MGEs) between 40 isolates of methicillin-resistant Staphylococcus aureus (MRSA) strain CC22-SCCmecIV but also showed (i) detection of two previously unrecognized MRSA transmission events and (ii) that 7/8 patients were infected with a variant of their own colonizing isolate. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-128]

2012-10-29 | E-BUGS-128 | biostudies-arrayexpress

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Project description:Staphylococcus aureus clonal complex 398 (CC398) isolates colonize livestock and can spread to human contacts. Genetic analysis of isolates epidemiologically associated with human-to-human, but not livestock, transmission in multiple countries and continents identified a common clade that was negative for tet(M) and positive for bacteriophage 3. Another group of human-to-human-transmitted isolates belonged to the common livestock-associated clade but had acquired a unique φ7 bacteriophage. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-124]

2012-10-29 | E-BUGS-124 | biostudies-arrayexpress

Comparative genomic hybridization of S. aureus to examine Genetic Diversity in CC398 Methicillin-Resistant Staphylococcus aureus of Different Geographic Origin.

Project description:Data is also available from <ahref=http://bugs.sgul.ac.uk/E-BUGS-84 target=_blank>BuG@Sbase</a>

2009-09-22 | E-BUGS-84 | biostudies-arrayexpress

The distribution of mobile genetic elements (MGEs) in MRSA CC398 is associated with both host and country.

Project description:Methicillin-resistant Staphylococcus aureus clonal complex (CC) 398 has emerged from pigs to cause human infections in Europe and North America. We used a new 62-strain S. aureus microarray (SAM-62) to compare genomes of isolates from three geographical areas (Belgium, Denmark, and Netherlands) to understand how CC398 colonizes different mammalian hosts. The core genomes of 44 pig isolates and 32 isolates from humans did not vary. However, mobile genetic element (MGE) distribution was variable including SCCmec. Phi3 bacteriophage and human specificity genes (chp, sak, scn) were found in invasive human but not pig isolates. SaPI5 and putative ruminant specificity gene variants (vwb and scn) were common but not pig specific. Virulence and resistance gene carriage was host associated but country specific. We conclude MGE exchange is frequent in CC398 and greatest among populations in close contact. This feature may help determine epidemiological associations among isolates of the same lineage. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-120]

2012-01-21 | E-BUGS-120 | biostudies-arrayexpress

Transcriptional profiling of Neisseria meningitidis Interacting with Human Epithelial Cells in a Long-Term In Vitro Colonization Model

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2013-11-02 | E-BUGS-141 | biostudies-arrayexpress

Transcription profiling by array of Dominant Role of Nucleotide Substitution in the Diversification of Serotype 3 Pneumococci over Decades and during a Single Infection

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2013-11-02 | E-BUGS-144 | biostudies-arrayexpress

Transcriptome Analysis of Responses to Rhodomyrtone in Methicillin-Resistant Staphylococcus aureus

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2012-10-14 | E-BUGS-136 | biostudies-arrayexpress

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