Summary of Study ST001866

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench,, where it has been assigned Project ID PR001178. The data can be accessed directly via it's Project DOI: 10.21228/M8F99F This work is supported by NIH grant, U2C- DK119886.


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Study IDST001866
Study TitleSystemic metabolite changes due to PHD inhibition
Study TypeComparative metabolomic analysis of serum metabolites detected by untargeted LC/MS and GC/MS platform
Study SummaryProlonged cellular hypoxia leads to energetic failure and death. However, sublethal hypoxia can trigger an adaptive response called hypoxic preconditioning. While prolyl-hydroxylase (PHD) enzymes and hypoxia inducible factors (HIFs) have been identified as key elements of oxygen sensing machinery, the mechanisms by which hypoxic preconditioning protects against insults remain unclear. Here, we perform serum metabolomic profiling to assess alterations induced by hypoxic preconditioning. We discover that hypoxic preconditioning increases serum kynurenine levels and enhance kynurenine biotransformation leading to preservation of NAD+ in the post-ischemic kidney. Furthermore, we show that Indoleamine 2,3-dioxygenase 1 (Ido1) deficiency abolishes the systemic increase of kynurenine and the subsequent renoprotection generated by hypoxic preconditioning. Importantly, exogenous administration of kynurenine restores the hypoxic preconditioning in the context of Ido1 deficiency. Collectively, our findings demonstrate a critical role of Ido1/kynurenine axis in mediating hypoxic preconditioning
Northwestern University
Last NameKapitsinou
First NamePinelopi
Address303 East Superior Street
Submit Date2021-07-03
Num Groups2
Total Subjects14
Num Males14
Study CommentsN/A
PublicationsAccepted in Cell Reports
Chear StudyNo
Analysis Type DetailLC-MS
Release Date2022-01-02
Release Version1
Pinelopi Kapitsinou Pinelopi Kapitsinou application/zip

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Combined analysis:

Analysis ID AN003026 AN003027 AN003028
Analysis type MS MS MS
Chromatography type GC Unspecified Unspecified
Chromatography system Thermo-Finnigan Trace DSQ Waters Acquity Waters Acquity
Column per Metabolon per Metabolon per Metabolon
MS instrument type Single quadrupole Single quadrupole Single quadrupole
MS instrument name Thermo LTQ-FT Thermo LTQ-FT Thermo LTQ-FT
Units Peak Peak Peak


Chromatography ID:CH002242
Chromatography Summary:The samples destined for GC/MS analysis were re-dried under vacuum desiccation for a minimum of 24 hours prior to being derivatized under dried nitrogen using bistrimethyl-silyl-triflouroacetamide (BSTFA). The GC column was 5% phenyl and the temperature ramp is from 40° to 300° C in a 16 minute period. Samples were analyzed on a Thermo-Finnigan Trace DSQ fast-scanning single-quadrupole mass spectrometer using electron impact ionization. The instrument was tuned and calibrated for mass resolution and mass accuracy on a daily basis.
Instrument Name:Thermo-Finnigan Trace DSQ
Column Name:per Metabolon
Chromatography Type:GC
Chromatography ID:CH002243
Chromatography Summary:The LC/MS portion of the platform was based on a Waters ACQUITY UPLC and a Thermo-Finnigan LTQ mass spectrometer, which consisted of an electrospray ionization (ESI) source and linear ion-trap (LIT) mass analyzer. The sample extract was split into two aliquots, dried, then reconstituted in acidic or basic LC-compatible solvents, each of which contained 11 or more injection standards at fixed concentrations. One aliquot was analyzed using acidic positive ion optimized conditions and the other using basic negative ion optimized conditions in two independent injections using separate dedicated columns. Extracts reconstituted in acidic conditions were gradient eluted using water and methanol both containing 0.1% Formic acid, while the basic extracts, which also used water/methanol, contained 6.5mM Ammonium Bicarbonate.
Instrument Name:Waters Acquity
Column Name:per Metabolon
Chromatography Type:Unspecified