Summary of Study ST003049

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001899. The data can be accessed directly via it's Project DOI: 10.21228/M88147 This work is supported by NIH grant, U2C- DK119886.

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This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.

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Study IDST003049
Study TitlePlasma instead of serum avoids critical confounding of clinical metabolomics studies by platelets (Part 2/3 - Eicosadomics of isolated platelets)
Study SummaryMetabolomics is an emerging and powerful molecular profiling 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 multi-omics 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=104, 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 when 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 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 a decrease in polyunsaturated fatty acids. The present data suggests that plasma should be preferred above serum for clinical metabolomics studies as the serum metabolome may be substantially confounded by platelets.
Institute
University of Vienna
DepartmentDepartment of Analytical Chemistry
LaboratoryGerner lab
Last NameHagn
First NameGerhard
AddressWähringerstraße 38, 1090 Vienna, Austria
Emailgerhard.hagn@univie.ac.at
Phone+43 1 4277 52375
Submit Date2024-01-22
Raw Data AvailableYes
Raw Data File Type(s)raw(Thermo)
Analysis Type DetailLC-MS
Release Date2024-04-12
Release Version1
Gerhard Hagn Gerhard Hagn
https://dx.doi.org/10.21228/M88147
ftp://www.metabolomicsworkbench.org/Studies/ application/zip

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Combined analysis:

Analysis ID AN005000
Analysis type MS
Chromatography type Reversed phase
Chromatography system Thermo Vanquish
Column Phenomenex Kinetex XB-C18(150 * 2.1 mm, 2.6um, 100 A°)
MS Type ESI
MS instrument type Orbitrap
MS instrument name Thermo Q Exactive HF hybrid Orbitrap
Ion Mode NEGATIVE
Units normalized AUC

Chromatography:

Chromatography ID:CH003778
Chromatography Summary:For LC-MS analyses, analytes were separated using a Thermo Scientific Vanquish (UHPLC) system equipped with a Kinetex C18-column (2.6 µm, XB-C18, 100 A° , LC Column 150 * 2.1 mm; Phenomenex) applying a gradient flow profile (mobile phase A: H2O + 0.2% FA, mobile phase B: ACN:MeOH (vol% 90:10) + 0.2% FA) starting at 35% B and increasing to 90% B (1–10 min), further increasing to 99% B within 0.5 min and held for 5 min. Solvent B was then decreased to the initial level of 35% within 0.5 min and the column was equilibrated for 4 min, resulting in a total run time of 20 min. The flow rate was kept at 200 µL min-1 and the column oven temperature at 40°C. The injection volume was 20 µL and all samples were analysed in technical duplicates.
Instrument Name:Thermo Vanquish
Column Name:Phenomenex Kinetex XB-C18(150 * 2.1 mm, 2.6um, 100 A°)
Column Temperature:40
Flow Gradient:0min with 35% B to 90% B (1–10 min), further increasing to 99% B within 0.5 min and held for 5 min. Solvent B was then decreased to the initial level of 35% within 0.5 min and the column was equilibrated for 4 min, resulting in a total run time of 20 min.
Flow Rate:0.2 mL/min
Solvent A:100% water; 0.2% formic acid
Solvent B:90% acetonitrile/10% methanol; 0.2% formic acid
Chromatography Type:Reversed phase
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