Project description:We used Affymetrix GeneChips to expression profile rat kidney NRK-52E cells treated with control scrambled siRNA or siRNA specifically targeting Adamts16. The goal of this project was to identify the downstream genes regulated by Adamts16 (the function of Adamts16 has yet to be fully delineated). Gene expression differences resulting from these siRNA-mediated gene knockdown experiments will be compared to the gene expression profiling experiments comparing kidneys from Dahl salt-senstive hypertensive inbred strain versus less hypertensive S.LEW(D1MCO4x1x3Bx1) congenic strain. The S.LEW(D1MCO4x1x3Bx1) congenic animal is an S rat containing the LEWIS allele for Adamts16 instead of the S allele. Gene expression differences in the kidneys of S.LEW(D1MCO4x1x3Bx1) versus S are hypothesized to result from sequence differences between the S and LEWIS alleles for Adamts16. It is further hypothesized that allelic differences in Adamts16 in inbred rats is responsible for blood pressure variance. The downstream genes regulated by Adamts16 may provide insight pertaining to the mechanism of blood pressure differences. Experiment Overall Design: RNA from 3 independent cultures of NRK-52E cells treated with scrambled control siRNA was extracted for target preparation and hybridization onto Affymetrix GeneChips. We also isolated RNA from NRK-52E cells treated with two different siRNAs targeting Adamts16 (n=2 independent cultures for each siRNA) for target preparation and hybridization onto Affymetrix GeneChips.
Project description:Recent studies have shown that AMPKα2 can regulate epithelial-mesenchymal transition(EMT) processes during kidney fibrosis. However, the underlying mechanisms for AMPKα2 changes in renal tubular EMT remain unclear. TGF-β1 was used to induce epithelial-mesenchymal transition(EMT) in normal rat renal tubular epithelial (NRK-52E) cells. Gene microarray was used to analyze differential gene expression in EMT-derived NRK-52E cells before and after the AMPKα2 knockout
Project description:In this study we have examined the effect of sub-cytotoxic exposure to aristolochic acids (1.65µM) at 6h, 24h and 72h on the whole-genome expression profile in a rat proximal renal tubule cell line (NRK-52E). We used microarrays to detail the mechanism of toxicity and possibly carcinogenicity of aristolochic acids in rat renal proximal cells. NRK-52E cells were cultured to confluence on 6-well plates. Cells were then exposed to aristolochic acid dissolved in DMSO (0.1%) at the IC10 concentration at 72h (1.65 ?M) or DMSO only as control. After 6h, 24h and 72h the medium was removed and RNA was extracted from the cells. Three studies were conducted at each time point.