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Microarray analysis of Haemophilus parasuis SH0165 genomics induced by tilmicosin

ABSTRACT: To gain an extensive understanding of the molecular mechanisms of tilmicosin, we can begin by understanding the different regulated responses of bacteria to tilmicosin and studying the physiological activity of bacteria. In this study, we used microarray technology to analyze the variation of the H. parasuis SH0165 transcriptional profile in response to inhibitory and sub-inhibitory concentrations of tilmicosin. Our analysis to identify several genes whose system could be involved in the protection from antibiotic stress targeting the ribosome 50 subunit and help to confer the basal level of H. parasuis responses to antibacterial drugs, such as heat shock protein, ribosome and ribosome related transcription genes, the cell wall biogenesis genes. Quantitative RT-PCR was used to validate the differential expression of fifteen selected genes.

ORGANISM(S): Glaesserella parasuis SH0165

PROVIDER: GSE34744 | GEO | 2012/11/10

SECONDARY ACCESSION(S): PRJNA150391

REPOSITORIES: GEO

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Microarray analysis of Haemophilus parasuis SH0165 genomics induced by tilmicosin

Project description:To gain an extensive understanding of the molecular mechanisms of tilmicosin, we can begin by understanding the different regulated responses of bacteria to tilmicosin and studying the physiological activity of bacteria. In this study, we used microarray technology to analyze the variation of the H. parasuis SH0165 transcriptional profile in response to inhibitory and sub-inhibitory concentrations of tilmicosin. Our analysis to identify several genes whose system could be involved in the protection from antibiotic stress targeting the ribosome 50 subunit and help to confer the basal level of H. parasuis responses to antibacterial drugs, such as heat shock protein, ribosome and ribosome related transcription genes, the cell wall biogenesis genes. Quantitative RT-PCR was used to validate the differential expression of fifteen selected genes. H. parasuis SH0165 was induced by 0.25Âµg/ml tilmicosin at OD600 >0.3 (16 h). The 8Âµg/ml tilmicosin treatment was 50 mins at OD600 >0.3 (12 h). The H. parasuis SH0165 control group was normal culture with no tilmicosin at OD600 >0.3 (12 h). Three independent experiments were performed on each group using a different sample for each experiment.

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Project description:To understand the mechanism of the adaptations, global gene expression profiles of the cecropin B--resistant strains of Haemophilus parasuis, The development of cecropin B (CB) resistance in H. parasuis SH0165 by exposing SH0165 using various concentrations of CB was investigated. One colony of bacterial cultures grown on TSA containing 30M-NM-<g/mL CB was named CBR30, CBR30 cultured in TSA without CB for 50 passages was named CBR30-50. we used microarray technology to analyze the variation of the H. parasuis SH0165 transcriptional profile in CBR30 and CBR30-50. Our analysis to identify several genes whose system could be involved in inorganic ion transport, amino acid transport, and metabolism. Quantitative PCR was used to validate the differential expression of selected genes. The H. parasuis SH0165 control group was normal culture with no tilmicosin at OD600 >0.3 (12 h). The H. parasuis CBR30 was normal culture with 30M-NM-<g/mL cecropin B at OD600 >0.3 (20 h). The H. parasuis CBR30-50 was normal culture with no cecropin B at OD600 >0.3 (12 h). Three independent experiments were performed on each group using a different sample for each experiment.

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