Project description:Hourly time course samples for the yeast (Y) treatment group. Larvae were reared on standard diet until early third instar, at which time they were washed and transferred to standard diet lacking yeast. The animals remained on this diet until four days after emergence, when one group of adults was switched back to standard diet containing yeast (group Y) while another remained on the diet lacking yeast (group NY). Flies from both groups were killed every hour for the next twelve hours, creating 24 samples across the two treatments. In addition, four samples of flies were killed just before the start of the time course and used as baseline replicates for the no yeast (NY) and yeast (Y) treatments. Baseline replicates were temporally ordered as noted for change-point analysis. No yeast (NY) treatment samples at hours four and eight did not yield microarray data due to insufficient RNA. Total RNA was extracted from whole animals using Trizol (Invitrogen). Sample processing and microarray hybridization/scanning were performed at the Brown University Center for Genetics and Genomics according to Affymetrix protocol. Microarray data was normalized by DNA-Chip Analyzer (dChip, http://www.dchip.org), which utilizes an invariant difference selection (IDS) algorithm to construct a normalization relation. Keywords = insulin, diet, nutrition Keywords: time-course
Project description:Hourly time course samples for the no yeast (NY) treatment group. Note that the samples at hours 4 and 8 do not have microarray data due to insufficient RNA yield. Larvae were reared on standard diet until early third instar, at which time they were washed and transferred to standard diet lacking yeast. The animals remained on this diet until four days after emergence, when one group of adults was switched back to standard diet containing yeast (group Y) while another remained on the diet lacking yeast (group NY). Flies from both groups were killed every hour for the next twelve hours, creating 24 samples across the two treatments. In addition, four samples of flies were killed just before the start of the time course and used as baseline replicates for the no yeast (NY) and yeast (Y) treatments. Baseline replicates were temporally ordered as noted for change-point analysis. No yeast (NY) treatment samples at hours four and eight did not yield microarray data due to insufficient RNA. Total RNA was extracted from whole animals using Trizol (Invitrogen). Sample processing and microarray hybridization/scanning were performed at the Brown University Center for Genetics and Genomics according to Affymetrix protocol. Microarray data was normalized by DNA-Chip Analyzer (dChip, http://www.dchip.org), which utilizes an invariant difference selection (IDS) algorithm to construct a normalization relation. Keywords = insulin, diet, nutrition Keywords: time-course
Project description:NIH-3T3 cells transduced with either EBF1-, PPARg2- or empty vector were stimulated with hormones to initiate adipocyte differentiation. RNA extraction was done using TriZol at d0, d2, d4 and d10 after stimulation. Samples were handled according to standard affymetrix protocols. Keywords = Adipogenesis Keywords = adipocyte Keywords = early B-cell factor 1 (EBF1) Keywords = commitment Keywords = differentiation Keywords = NIH-3T3 Keywords = pparg Keywords: time-course
Project description:Murine RAW 264.7 peritoneal macrophages were treated with 250 ppm Carbon monoxide (CO) for 3 hours prior to the addition of LPS (10 ng/ml) and then for the subsequent 4 hours of the study. Air-treated cells were maintained for the same time without CO. Total RNA was harvested at 0, 15, 30, 60, 120 and 240 min after LPS addition. CRNA was produced using standard Affymetrix procedures from 10µg of total RNA. The expression values of all probe sets are scaled to a target intensity of 500 by using Affymetrix Microarray Suite 5.0 Keywords = macrophage Keywords = inflammation Keywords = endotoxin Keywords = gene expression Keywords: time-course
Project description:The w1118 strain is an inbred lab stock widely used in genetic and transgenic studies. w1118 males have a median life span of 35 days. Adult males were collected within 24 hr after eclosion. Approximately 200 flies were maintained in constant darkness in each food bottle at 25°C and 70% humidity and were transferred to fresh bottles every 3-4 days. Transcripts were harvested at d3 and d47. To separate the head from the rest of the body, flies were frozen and briefly vortexed in liquid nitrogen. Fly heads were collected using a sieve which retained fly bodies. Total RNA was extracted using Trizol (GIBCO/BRL). Poly(A) RNA was isolated using Oligotex resin (Qiagen). Samples were profiled with Affymetrix DrosGenome1 GeneChips, using standard Affymetrix protocol. Keywords: time-course