Project description:Transcriptional profiling comparing Escherichia coli simultaneously exposed to tellurite and CTX with untreated control cells; Tellurite with control; CTX with control
Project description:Transcriptional profiling comparing Escherichia coli simultaneously exposed to tellurite and CTX with untreated control cells; Tellurite with control; CTX with control Three-condition experiment, antibacterial (tellurite; CTX or tellurite/CTX) vs. Untreated control cells. Biological replicates: 3 control, 3 toxicants exposed cells, independently grown and harvested. One replicate per array.
Project description:Zoo-ChIP: Functional analysis of experimentally determined combinatorial transcription factor binding in multiple mammalian species
Project description:Utilizing glycerol and cardiotoxin (CTX) injections in the tibialis anterior muscles of M. musculus provides models of skeletal muscle damages followed by skeletal muscle regeneration. In particular, glycerol-induced muscle regeneration is known to be associated with ectopic adipogenesis. We characterized genome-wide expression profiles of tibialis anterior muscles from wild-type mice injured by either glycerol or CTX injection. Our goal was to detect gene expression changes during the time course of glycerol-induced and CTX-induced muscle regeneration models, that can lead to ectopic adipocyte accumulation.
Project description:To gain further molecular insight into the observed astrocyte functions, we performed RNA-sequencing (RNA-seq) analysis of the differentiated Ctx-NPCs (control), Ctx-astrocytes and VM-astrocytes used in the co-culture and CM experiments. The genes that are differentially expressed (DEGs) in Ctx-astrocytes compared to differentiated Ctx-NPCs (FPKM>1, log2>1) significantly overlapped with DEGs in VM-astrocytes compared to differentiated Ctx-NPCs
Project description:Horizontal gene transfer (HGT) is the major mechanism responsible for spread of antibiotic resistance. Antibiotic treatment has been suggested to promote HGT, either by directly affecting the conjugation process itself or by selecting for conjugations subsequent to DNA transfer. However, recent research suggests that the effect of antibiotic treatment on plasmid conjugation frequencies, and hence the spread of resistance plasmids, may have been overestimated. We addressed the question by quantifying transfer proteins and conjugation frequencies of a blaCTX-M-1 encoding IncI1 resistance plasmid in Escherichia coli MG1655 in the presence and absence of therapeutically relevant concentrations of cefotaxime (CTX). Analysis of the proteome by iTRAQ labeling and liquid chromatography tandem mass spectrometry revealed that Tra proteins were significantly up regulated in the presence of CTX. The up-regulation of the transfer machinery was confirmed at the transcriptional level for five selected genes. The CTX treatment did not cause induction of the SOS39 response as revealed by absence of significantly regulated SOS associated proteins in the proteome and no significant up-regulation of recA and sfiA genes. The frequency of plasmid conjugation, measured in an antibiotic free environment, increased significantly when the donor was pre-grown in broth containing CTX compared to growth without this drug, regardless of whether blaCTX-M-1 was located on the plasmid or in trans on the chromosome. The results shows that antibiotic treatment can affect expression of a plasmid conjugation machinery and subsequent DNA transfer.
