Project description:Over the last 60 years, marine natural products have had major economic and commercial importance. The development of a National Marine Biodiscovery Laboratory in Ireland (NMBLI), located at the Marine Institute (Oranmore), aims to strengthen Ireland’s capacity as research leaders in marine biotechnology and in particularly marine natural products chemistry. The NMBLI houses an Irish marine repository derived from marine macro-organisms collected in Irish coastal waters. The aim of this project is to collect organisms for the marine repository and identify samples of interest for chemical investigation. Other than the development of the laboratory at the marine institute (Oranmore) with the appropriate facilities and procedure to undertake biodiscovery research, the outcomes of this project are to identify bioactive marine natural products from Irish marine life.
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: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 .
Project description:We investigated the gene expression of the human CPE.We isolated CPE cells from healthy human donor choroid plexus tissues 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, namely human RPE/choroid RNA. We performed 7 replicates of human CPE samples from 7 different donors.
Project description:We investigated the gene expression of the human CPE.We isolated CPE cells from healthy human donor choroid plexus tissues with laser dissection microscopy. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays.