Project description:Response of mouse mammary epithelial cells NMuMG to TGF-b1 - time course experiment. Identification of novel gene targets involved in TGF-b1-driven regulation of epithelial-mesenchymal transition (EMT).
Project description:Identification of novel TGF-b1 and BMP-7-regulated genes in epithelial cells.<br> <br> Human mammary epithelial cell line MDA-MB-468 that is lacking endogenous Smad4 was infected with either an adenovirus carrying GFP cDNA (control) or Smad4 cDNA (to restore the Smad4 activity in the cells). Cells were treated with TGF-b1 (0.5 ng/ml) or BMP-7 (300 ng/ml) for 2 or 12h. Smad4-independent vs Smad4-dependent response was measured. Also response to both growth factors was compared.
Project description:In order to study the physiological consequences of a high-copper diet on hepatic gene expression, 6 mM CuCl2 was added to the drinking water for a period of 1 month. After this period, livers of seven control mice and eight copper-treated mice were isolated and were subjected to microarray analysis and copper measurements. The hepatic gene expression profile of copper-treated mice was compared to non-treated mice using a pooled reference.
Project description:Nine time points for microarray analysis were chosen to study early and late transcriptional responses in copper metabolism upon copper overload in HepG2 cells. Samples of copper-treated cells were hybridized using non-treated samples as a reference.
Project description:Alterations in genes for penicillin-binding proteins (pbp) are well-known determinants for the resistance of Streptococcus pneumoniae to B-lactam antibiotics. Surprisingly, some mutations in non-pbp genes were also found to contribute to B-lactam resistance. Two of them discovered in the piperacillin resistant mutants P106 and P104, affect the expression of cpoA (encoding a glycosyltransferase) and of the rgtABCDHR cluster (encoding two small membrane proteins, an ABC transporter and a regulatory two-component system), respectively. cpoA and rgtABCDHR are involved in maintaining the synthesis and the proper ratio of the two major membrane glycolipids, and deletions in these genes led to complex phenotypes. In attempts to identify genetic determinants for these phenotypes, the global trancription patterns of the deletion mutants R6 delta cpoA, R6 delta rgtA and R6 delta rgtD were compared to that of the parent strain R6.
Project description:Exponentially growing Sulfolobus acidocaldarius were treated with NaAc to generate replication runout and arrest in G2 phase. The cells were then resuspended in fresh acetate-free media which generates a synchronous population. Samples for investigation of gene expression change were taken during the synchronised populations progress through the cell cycle.