ABSTRACT: Comparison of gene expression profile of muscle samples stored under vacuum at +4°C up to 14 days from growth promoters-treated and control cows.
Project description:The liver of dairy cows naturally displays a series of metabolic adaptation during the periparturient period in response to the increasing nutrient requirement of lactation. The hepatic adaptation is partly regulated by insulin resistance and it is affected by the prepartal energy intake level of cows. We aimed to investigate the metabolic changes in the liver of dairy cows during the periparturient at gene expression level and to study the effect of prepartal energy level on the metabolic adaptation at gene expression level.B13:N13
Project description:A bovine oligo microarray platform (GPL7053) was used to evidence differences in gene expression profiles of muscle samples from five (5) dexamethazone plus estradiol treated cows and from five (5) control animals. Samples were stored under vacuum at +4°C and collected at D0 and D14.
Project description:The experiment is part of a study aimed at identifying and studying genes that contribute to differences in oestrous behaviour expression and fertility levels of dairy cows. Samples from 4 brain areas (dorsal hypothalamus, ventral hypothalamus, amygdala and hippocampus) and the anterior pituitary were collected from 28 primiparous Holstein Friesian cows, 14 of which were sacrificed at start of oestrus and 14 at mid of oestrous cycle. Differential gene expression between the 2 phases of oestrous cycle as well as the association of gene expression patterns with the level of oestrous behaviour expression are studied.
Project description:A bovine oligo microarray platform (GPL7053) was used to evidence differences in gene expression profiles of muscle samples from five (5) dexamethazone plus estradiol treated cows and from five (5) control animals. Samples were stored under vacuum at +4°C and collected at D0 and D14. In this study, we analyzed twenty (20) bovine neck muscle samples stored under vacuum at 4°C and collected at D0 (10) and D14 (10) from five (5) dexamethazone plus estradiol treated cows and five (5) from control animals. Gene expression profiling was performed using the Agilent-015354 Bos taurus Oligo Microarray platform (GPL7053) based on single-colour detection (Cyanine-3 only). Microarrays were scanned with Agilent scanner G2565BA (barcode on the left, DNA on the back surface, scanned through the glass) at a resolution of 5 microns; all slides were scanned twice at two different sensitivity settings (XDRHi 100% and XDRLo 10%); the scanner software created a unique ID for each pair of XDR scans and saved it to both scan image files. Feature Extraction (FE) 9.5 used XDR ID to link the pairs of scans together automatically when extracting data. The signal left after all the FE processing steps have been completed is ProcessedSignal that contains the Multiplicatively Detrended, Background-Subtracted Signal.
