PXD033412-1

PXD033412 is an original dataset announced via ProteomeXchange.

Title	Hepatic urea, creatinine and uric acid metabolism in dairy cows with divergent milk urea concentrations
Description	Milk urea concentration is an indicator for dietary nitrogen (N)-supply and urinary nitrogen excretion. Dairy cows with high (HMU) compared to low milk urea (LMU) concentration have greater plasma urea, creatinine and uric acid concentrations, but if the liver metabolism accounts for these differences is unknown. Eighteen HMU and 18 LMU cows were fed either a diet with a low (LP) and normal (NP) crude protein concentration. An N-balance study was performed and a 13C-urea bolus was administered followed by a series of blood samplings. Liver samples were analysed by 2D-gel-based proteomics and real-time RT-PCR. Although HMU cows had a higher urea pool, plasma urea, uric acid, and hippuric acid concentrations, these differences were not associated with increased activation of the hepatic urea cycle or non-urea nitrogen metabolite pathways. Instead, HMU cows had a higher oxidative stress level. Conclusively, other factors than hepatic urea metabolism account for the milk urea concentration. Despite higher plasma urea concentrations on the LP diet, urea cycle mRNA expression was not affected, indicating it is not controlled at transcriptional level. Feeding the LP diet resulted in higher expressions of enzymes catabolizing fatty acids, which is likely due to diminished microbial growth and insufficient energy supply.
HostingRepository	PRIDE
AnnounceDate	2022-09-27
AnnouncementXML	Submission_2022-09-27_07:15:31.677.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Dirk Albrecht
SpeciesList	scientific name: Bos taurus (Bovine); NCBI TaxID: 9913;
ModificationList	No PTMs are included in the dataset
Instrument	5800 TOF/TOF

Revision	Datetime	Status	ChangeLog Entry
0	2022-04-24 12:26:25	ID requested
⏵ 1	2022-09-27 07:15:32	announced

Dataset with its publication pending

submitter keyword: proteomics, gel electrophoresis, PCR, purine, nitrogen excretion

Dirk Albrecht
contact affiliation	Institut of Microbiology, Univerity of Greifswald
contact email	dirkalbr@uni-greifswald.de
lab head
Dirk Albrecht
contact affiliation	EMAU
contact email	dirkalbr@uni-greifswald.de
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD033412
     1. Label: PRIDE project
     2. Name: Hepatic urea, creatinine and uric acid metabolism in dairy cows with divergent milk urea concentrations