PXD041781

PXD041781 is an original dataset announced via ProteomeXchange.

Title	Plasma Instead of Serum Avoids Critical Confounding of Clinical Metabolomics Studies by Platelets – serum and plasma
Description	Metabolomics is an emerging and powerful bioanalytical method supporting clinical investigations. Serum and plasma are commonly used without rational prioritization. Serum is collected after blood coagulation, a complex biochemical process involving active platelet metabolism. This may affect the metabolome and increase the variance, as platelet counts and function may vary substantially in individuals. A multiomics approach systematically investigating the suitability of serum and plasma for clinical studies demonstrated that metabolites correlated well (n = 461, R2 = 0.991), whereas lipid mediators (n = 83, R2 = 0.906) and proteins (n = 322, R2 = 0.860) differed substantially between specimen. Independently, analysis of platelet releasates identified most biomolecules significantly enriched in serum compared to plasma. A prospective, randomized, controlled parallel group metabolomics trial with acetylsalicylic acid administered for 7 days demonstrated that the apparent drug effects significantly differ depending on the analyzed specimen. Only serum analyses of healthy individuals suggested a significant downregulation of TXB2 and 12-HETE, which were specifically formed during coagulation in vitro. Plasma analyses reliably identified acetylsalicylic acid effects on metabolites and lipids occurring in vivo such as an increase in serotonin, 15-deoxy-PGJ2 and sphingosine-1-phosphate and a decrease in polyunsaturated fatty acids. The present data suggest that plasma should be preferred above serum for clinical metabolomics studies as the serum metabolome may be substantially confounded by platelets.
HostingRepository	PRIDE
AnnounceDate	2024-10-22
AnnouncementXML	Submission_2024-10-22_06:34:24.158.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Christopher Gerner
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	iodoacetamide derivatized residue
Instrument	timsTOF Pro

Revision	Datetime	Status	ChangeLog Entry
0	2023-04-24 09:09:08	ID requested
1	2024-03-25 03:56:17	announced
⏵ 2	2024-10-22 06:34:24	announced	2024-10-22: Updated project metadata.

Dataset with its publication pending

submitter keyword: confounder, platelets, proteomics, metabolomics, LC-MS, plasma, serum, drug effects

Christopher Gerner
contact affiliation	University of Vienna, Faculty of Chemistry, Department of Analytical Chemistry
contact email	christopher.gerner@univie.ac.at
lab head
Christopher Gerner
contact affiliation	University of Vienna
contact email	christopher.gerner@univie.ac.at
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD041781
     1. Label: PRIDE project
     2. Name: Plasma Instead of Serum Avoids Critical Confounding of Clinical Metabolomics Studies by Platelets – serum and plasma