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SRX19534764: GSM7073789: cow, pair-fed, rep3; Bos taurus; RNA-Seq
1 ILLUMINA (Illumina NovaSeq 6000) run: 23.6M spots, 7.1G bases, 2.1Gb downloads

External Id: GSM7073789_r1
Submitted by: Animal Science, Cornell
Study: Transcriptomic Regulations of Heat Stress Response in the liver of Lactating Dairy Cows
show Abstracthide Abstract
Heat stress (HS) has become a major challenge in the dairy industry around the world. Although numerous measures have been taken to alleviate the HS impact on milk production, the cellular level response to HS remains unclear in dairy cows. The objective of this study was to dissect functional alterations based on transcriptomic dynamics in the liver of cows under HS. Dairy cows exposed to HS exhibited both decreased feed intake and milk yield. Through liver transcriptomic analysis, differentially expressed genes were identified among three experimental conditions, including heat stress (HS), pair-fed (PF), and thermoneutral (TN) groups. We observed the upregulation of protein folding and inflammation-related genes in the HS group, while the mitochondrial genes were downregulated. Gene functional enrichment also revealed that mitochondria function and oxidative phosphorylation were dysregulated under HS. The liver transcriptome analysis generated a comprehensive gene expression regulation network upon HS in lactating dairy cows. Overall, this study provides novel insights into molecular and metabolic changes of cows conditioned under HS. Our results could facilitate the development of efficient biomarkers to mitigate the negative effect of HS on dairy cow health and productivity. Overall design: RNA-seq was to detect the differential expression genes across three environmental conditions: Heat stress, thermoneutrality, and pair-fed
Sample: cow, pair-fed, rep3
SAMN33550300 • SRS16921405 • All experiments • All runs
Organism: Bos taurus
Library:
Name: GSM7073789
Instrument: Illumina NovaSeq 6000
Strategy: RNA-Seq
Source: TRANSCRIPTOMIC
Selection: cDNA
Layout: PAIRED
Construction protocol: Total RNA was isolated from each sample using TRIzol reagent (Invitrogen, Carlsbad, CA), Phasemaker Tubes (Invitrogen), and RNeasy Mini Kit (Qiagen) according to the manufacturer's instructions with minor modifications. Specifically, tissue samples were homogenized in TRIzol and lysates were transferred to Phasemaker Tubes with chloroform for 20 min rotation at 4°C. The aqueous phase was then transferred to the gDNA elimination column for 1 min rotation at room temperature. The eluted RNA was washed with cold 70% ethanol, transferred to the RNeasy mini spin column, and washed with buffer RPE and RW1 (RNeasy Mini Kit). Finally, RNAs were eluted in RNAse-free water and concentrations were determined by a NanoDrop 1000 spectrophotometer (Thermo Scientific, Waltham, MA). RNA quality was evaluated on Bioanalyzer 2100 (Agilent) and only samples passed the QC were proceed with the downstream process. Next, mRNA was enriched from total RNA using poly-T oligo-attached magnetic beads. After fragmentation, the first strand cDNA was synthesized using random hexamer primers followed by the second strand cDNA synthesis. The library was ready after a series of subsequent steps, including end pair, A-tailing, adapter ligation, size selection, amplification, and purification. Finally, the library was checked with Qubit and real-time PCR for qualification and evaluated on a bioanalyzer for fragment size distribution. Quantified libraries were pooled and sequenced on Illumina platforms in paired-end mode (2x150bp).
Runs: 1 run, 23.6M spots, 7.1G bases, 2.1Gb
Run# of Spots# of BasesSizePublished
SRR2365255323,558,4937.1G2.1Gb2023-08-08

ID:
26820784

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