Global gene expression analysis of neutrophils from Periparturient Holstein Cows
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PROVIDER: PRJNA532347 | ENA |
REPOSITORIES: ENA
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Project description:This study aimed at evaluating the global gene expression of blood-derived neutrophils from periparturient cows. Blood was collected from Holstein Friesian periparturient cows (N=3) at −14 d relative to expected calving date and 7 d relative to actual calving date. Neutrophils were isolated and subsequently used for transcriptional profiling using the Agilent bovine (v2) 4 × 44 K array. Calculation of fold change in gene expression and pathway analysis was conducted using the GeneSpring GX software 13.0. Periparturient period impacted global gene expression and resulted in 249 genes that were differentially expressed (FC≥2, p<0.05.); 162 were upregulated post-calving 87 of these were downregulated. Genes that code for proinflammatory receptors (CD58, GLRX3), chemokines (CMKLR1), and transcriptional regulation (MTA) were upregulated. Concurrently, genes that code for cellular adhesion and migration (ADRM1 and THY1), and immune induction (CATHL2) and homeostasis were downregulated gene. Pathway analysis revealed that 118 pathways are affected in bovine neutrophils during the periparturient period (p<0.05). These pathways included the Wnt signaling, one carbon Metabolism, TLR, inflammation response, Oxidative Stress, T-Cell Receptor signaling, adipogenesis, and MAPK Signaling Pathways.
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Project description:Periparturient cows rely on adipose tissue fatty acid reserves released by lipolysis to offset the negative energy balance induced by physiological changes related to parturition and the onset of lactation. However, lipolysis causes inflammation and structural remodeling in excess predisposes cows to disease. The objective of this study was to determine effects of the periparturient period on the transcriptomic profile of AT using NGS RNAseq
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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
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Project description:Hepatic molecular adaptations underlying periparturient metabolic diseases such as ketosis in dairy cows are largely unknown. We used a simple model for induction of ketosis to examine liver gene expression profiles using a microarray consisting of 13,257 annotated cattle oligonucleotides. At 4 days post-partum, 7 cows classified as healthy after a physical examination were fed at 50% of intake at day 4 from day 5 to signs of ketosis or until 14 days post-partum. Another group of 7 healthy cows served as controls. Liver was biopsied at 9-14 (ketosis) or 14 days post-partum (controls). More than 9,000 sequences represented on the microarray were expressed in liver. Keywords: disease state analysis
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Project description:While dietary phosphorus (P) deprivation extending from the dry period into early lactation impairs health and productivity of cows, restricting dietary P supply during the dry period not only appears to be innocuous but rather effectively mitigates hypocalcemia during the first wk of lactation. To investigate possible negative metabolic effects of P deprivation during the dry period, the present study tested the hypothesis that restarted dietary P supply during the dry period alters the liver transcriptome of dairy cows during the periparturient period. Thirty late-pregnant multiparous Holstein-Friesian dairy cows entering their 2nd, 3rd or 4th lactation were assigned to either a dry cow ration with low (LP, 0.16% P in DM) or adequate P content (AP, 0.35% in DM) during the last 4 wk of the dry period (n = 15/group). Liver transcriptomics, which was carried out in a subset of five 2nd parity cows of each group (n = 5), and determination of selected hormones and metabolites in blood of all cows, was performed approximately one wk before calving and on d 3 postpartum. Liver tissue specimens and blood samples were obtained by a micro-invasive biopsy technique from the right 10th intercostal space and puncture of a jugular vein, respectively. 175 hepatic transcripts were expressed differentially between LP vs. AP cows in late pregnancy, and 165 transcripts differed between LP vs. AP cows in early lactation (Fold change > 1.3 and < -1.3, P < 0.05). In late pregnancy, the enriched biological processes of the up-regulated and the down-regulated transcripts were mainly related to immune processes and signal transduction (P < 0.05), respectively. In early lactation, the enriched biological processes of the up-regulated and the down-regulated transcripts were involved in mineral transport and biotransformation (P < 0.05), respectively. The plasma concentrations of the hormones and acute phase proteins (progesterone, insulin-like growth factor 1, serum amyloid alpha, haptoglobin, and 17β-estradiol) determined were not affected by P supply. These results suggest that P deprivation during the dry period moderately affects the liver transcriptome of cows in late pregnancy and early lactation, and causes no effects on important plasma hormones and acute phase proteins indicating no obvious impairment of health or metabolism of the cows.
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