Summary of Study ST000435

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 PR000330. The data can be accessed directly via it's Project DOI: 10.21228/M8W02Q This work is supported by NIH grant, U2C- DK119886.


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Study IDST000435
Study TitleQuantitative measurements of amino acids in T1D poor control, good control, and controls.
Study TypeQuantitative measurements of amino acid
Study SummaryThe objective of the study was to determine whether T1D with good glycemic control have persistent abnormalities of metabolites and pathways that exist in T1D with poor glycemic control.
Mayo Clinic
LaboratoryMayo Clinic Metabolomics Resource Core
Last NameNair
First NameSreekumaran
Address200 First Street SW, Rochester, MN 55905
Submit Date2016-07-20
Raw Data File Type(s)raw(Thermo)
Analysis Type DetailLC-MS
Release Date2016-09-23
Release Version1
Sreekumaran Nair Sreekumaran Nair application/zip

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Sample Preparation:

Sampleprep ID:SP000463
Sampleprep Summary:Plasma quality-control samples used in the study were prepared from pooled plasma spiked with a selection of metabolites to mimic elevated levels of metabolites during I− (insulin withdrawn) condition. Plasma was spiked with a standard mixture (3:1 ratio of plasma to spiking solution) containing 100 μg/mL niacin, hypoxanthine, leucine, isoleucine, phenylalanine, tryptophan, citric acid, glucose, hippuric acid, and taurocholic acid dissolved in 1:1 acetonitrile/water. All plasma samples (200 μL) were thawed on ice at 4°C followed by deproteinization with methanol (1:4 ratio of plasma to methanol) and vortexed for 10 s, followed by incubation at −20°C for 2 h. The samples were then centrifuged at 15,871g for 30 min at 4°C. The supernatants were lyophilized (Savant, Holbrook, NY) and stored at −20°C prior to analysis. The samples were reconstituted in 50% H2O/acetonitrile and passed through a Microcon YM3 filter (Millipore Corporation). The supernatants were transferred to analytical vials, stored in the autosampler at 4°C, and analyzed within 48 h of reconstitution in buffer.