Project description:We investigated the specific interactions of the most dominant bacterial CF-pathogen, Pseudomonas aeruginosa, and the anaerobic bacterium Veilllonella parvula, that has been recovered at comparable cell numbers in the respiratory tract of CF patients. We used our recently established in-vivo murine tumor model to investigate mutual influences of the two pathogens during a biofilm-associated infection process. We found that although P. aeruginosa and V. parvula colonized distinct niches within the tumor, in mice that were co-infected with both bacterial species significant higher cell numbers of P. aeruginosa were recovered from the tumor tissue. Concordantly, in vivo transcriptional profiling implied that the presence of V. parvula supports P. aeruginosa growth at the infected host site, and the higher P. aeruginosa load correlated with clinical deterioration.
Project description:Using RNA sequencing, we compared transcriptomes of root and aerial tissues of S. parvula and Arabidopsis and identified genes and pathways with significantly different basal expression strengths. Many stress-related ion transporter genes in S. parvula showed increased copy numbers and basal expression strengths compared with Arabidopsis, with evidence of subfunctionalization. These results provide a blueprint for mechanisms of plant ion stress tolerance as well as potential genetic resources for crop improvement in closely related species. Note: All samples in SRA were assigned the same sample accession (SRS845940 and SRS845941). This is incorrect as there are different samples, hence “Source Name” was replaced with new values. Comment[ENA_SAMPLE] contains the original SRA sample accessions.
