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Design: A comparative mRNA-seq profiling of the liver, rumen villi, mammalian gland and kidney of Holstein dairy cows with high vs normal milk-urea excretion and with low vs normal (control) crude protein intake
Submitted by: Leibniz-Institute for Farm Animal Biology (FBN) Institute of Genome Biology (Leibniz-Institute for Farm Animal Biology (FBN) In)
Study: A comparative mRNA-seq profiling of the liver, rumen villi, mammalian gland and kidney of Holstein dairy cows with high vs normal milk-urea excretion and with low vs normal (control) crude protein intake
show Abstracthide Abstract
Nitrogen (N) emissions became a huge topic under environmental and nutrient concerns in dairy farming. Nitrogen is metabolized in cows as a consequence of feed crude protein digestion which is either recycled or excreted via urine, faeces and/or milk. In dairy cows differences between cows in N-recycling and N-emissions have been postulated. This study investigated 24 Holstein dairy cows in late lactation. The experimental design comprises two dietary groups (low (LP) vs normal (NP) crude protein) and two groups of milk urea content, high (HMU) vs low (LMU). Transcriptomic profiles of the liver, rumen, mammalian gland and kidney tissues were comparatively assessed by mRNA sequencing.
Library:
Name: Pv_4_p
Instrument: Illumina HiSeq 2500
Strategy: RNA-Seq
Source: TRANSCRIPTOMIC
Selection: RANDOM
Layout: PAIRED
Construction protocol: In this study, 24 multiparous German Holstein cows were stalled in pairs for an adaptation and then 2-week experimental periods at the FBN facility. At the end of the experiment, the cows were slaughtered by a captive bolt stunning and followed by exsanguination. Tissue samples of the liver, kidney, mammalian gland and rumen villi were dissected, snap frozen in liquid nitrogen and stored until used at -80°C. Total RNA was isolated using TRI reagent (Sigma-Aldrich). Trace DNA contamination was removed by an on-column DNase I treatment (Baseline-Zero DNase), and the RNA was cleaned-up using a Nucleospin RNA kit. The RNA quantity was determined using NanoDrop and the RNA integrity was evaluated on an Agilent 2100 Bioanalyzer (Agilent Technologies). 2 µg of total RNA with RIN > 8 was used for library preparation using a TruSeq Stranded mRNA Kit with 11 cycles of PCR-amplification according to the manufacture's recommendation (Illumina).
Experiment attributes:
Experimental Factor: diet: normal (standard) crude protein
Experimental Factor: milk urea content: high
Experimental Factor: organism part: rumen villi
Run# of Spots# of BasesSizePublished
ERR4976321unavailable2024-11-30
ERR4976322unavailable2024-11-30

ID:
36368039

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