Project description:Differential gene expressions were constructed through expression profiling of a total of 22,556 genes in the hypertensive heart during the early and lately phase of Angiotensin II infusion, then 1019 or 647 significant differential genes were filtered based on the criteria (p<0.05 and fold change >2 or 1.5), respectively.
Project description:Copper induced stress is known to involve an enhanced oxidant production. This event could be accompanied by an antioxidant response. However, additional processes transcriptionally regulated might participate in the protective response against the metal ions. We used microarrays to detail the global programme of gene expression due to the copper overload and outline the cell processes mostly involved in the toxicity of the metal ions in two cell lines, BEAS-2B cells and HCT116 cells.
Project description:The effect of the heavy metal copper on the expression of a wide spectrum of genes was analyzed by using a DNA microarray. Gene expression profile of baker’s yeast Saccharomyces cerevisiae grown in a media containing sub-lethal concentration of cupric sulfate was compared with those of yeast grown in a normal media. Among about 6200 ORFs of yeast, 143 ORFs were induced more than two-fold to resist against copper toxicity after exposure to copper. As was expected, FRE1, FRE7, and CTR1, genes controlled by Mac1p, were strongly down-regulated. Copper metallothionein CUP1-1 and CUP1-2 were induced more than 20-fold. Some genes related to sulfur metabolism and oxidative stress response were also up-regulated. This DNA microarray technology indicated that plasma membrane, cell wall, protein, and DNA, were molecular targets of copper toxicity. Keywords: stress response