Project description:Antimicrobials have been shown to select for changes in biofilm formation and multidrug susceptibility in common human pathogens. We investigated whether common food preservatives selected for these changes in the food pathogen Salmonella enterica serovar Typhimurium. Bacteria were exposed to four food preservatives in either planktonic cultures or biofilms grown on stainless steel beads. Cultures were passaged into fresh media supplemented with the food preservative every 72 hours. Following approximately 1000 generations of continuous preservative exposure, populations were sequenced to determine the single nucleotide polymorphisms that were selected for over evolutionary time.
Project description:This study utilized microarray technology as an exploratory search for mechanisms of systemic effects after welding fume inhalation. In addition, the applicability of this methodological approach for determining specific exposure-induced responses was examined. C57Bl/6J mice were exposed to gas metal arc-stainless steel (GMA-SS) welding fume by inhalation for 10 days (3 hours/day) at 40 mg/m3. Microarray analysis was done on lung, blood and aorta from n=4 mice exposed to welding fume or air (control).
Project description:A specific discovery proteomic protocol for intervertebral discs relies on an efficient protein extraction using the bead beating homogenizing method with stainless steel grinding balls coupled with a customized lysis buffer, and followed by the protein detection with specific mass spectrometry setting.
Project description:Transcriptional profiles of Salmonella Typhimurium str. ST4/74 air-dried onto stainless steel for 4 h was compared to an early stationary phase (ESP) culture control. Cells that had been air-dried for 4 h were then subsequently rehydrated with water for a 30 min period, after which the transcriptional profile was compared to an ESP control.
Project description:Neuropathic pain (NP) is caused by primary or secondary impairment of the peripheral or central nervous systems. Its etiology is complex and involves abnormal patterns of gene expression and pathway activation. Using bioinformatic analysis, we aimed to identify NP-associated changes in genes and pathways in L4 and L5 dorsal root ganglia (DRG) in a rat model of NP induced by chronic compression of the DRG (CCD). All rats were divided into the sham and CCD groups randomly. Rats in CCD groups were anesthetized, followed by the implantation of two stainless steel rods in the intervertebral foramina between L4 and L5. Rats in the sham-operated group underwent the same procedure without steel rod insertion. DRG were harvested on the 7th day post-surgery.
