Project description:We investigated the gene expression of the mouse CPE. We isolated CPE cells from three mouse brains with laser dissection microscopy. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays.
Project description:Enterotoxin-producing C. perfringens type A is a common cause of food poisonings. The cpe encoding the enterotoxin can be chromosomal (genotype IS1470) or plasmid-borne (genotypes IS1470-like-cpe or IS1151-cpe). The chromosomal cpe-carrying C. perfringens are a more common cause of food poisonings than plasmid-borne cpe-genotypes. The chromosomal cpe-carrying C. perfringens type A strains are generally more resistant to most food-processing conditions than plasmid-borne cpe-carrying strains. On the other hand, the plasmid-borne cpe-positive genotypes are more commonly found in human feces than chromosomal cpe-positive genotypes, and humans seem to be a reservoir for plasmid-borne cpe-carrying strains. Thus, it is possible that the epidemiology of C. perfringes type A food poisonings caused by plasmid-borne and chromosomal cpe-carrying strains is different. A DNA microarray was designed for analysis of genetic relatedness between the different cpe-positive and cpe-negative genotypes of C. perfringens strains isolated from human, animal, environmental and food samples. The DNA microarray contained two probes for all protein-coding sequences in the three genome-sequenced strains (C. perfringens type A strains 13, ATCC13124, and SM101). The chromosomal and plasmid-borne C. perfringens genotypes were grouped into two distinct clusters, one consisting of the chromosomal cpe-genotypes and the other consisting of plasmid-borne cpe-genotypes. Analysis of the variable gene pool complemented with the growth studies demonstrate different carbohydrate and amine metabolism in the chromosomal and plasmid-borne cpe-carrying strains, suggesting different epidemiology of the cpe-positive C. perfringens strain groups.
Project description:MLS000408882-01 and MLS000573813-01 were identified through a cell based screen that measures the reactivation of an epigenetically silenced transgene. MLS000408882-01 and MLS000573813-01 shows selectivity for cancer vs. normal cells affecting both transcriptional patterns and cell viability in a cancer specific manner.
Project description:We investigated the gene expression of the mouse CPE. We isolated CPE cells from three mouse brains with laser dissection microscopy. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays. We performed the microarrays against a common reference sample, which was mouse RPE/choroid RNA. We performed 3 mouse CPE replicates from 3 different mouse from the same strain, namely C57BL/6 .