Summary of Study ST000435
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 PR000330. The data can be accessed directly via it's Project DOI: 10.21228/M8W02Q This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
| Study ID | ST000435 |
| Study Title | Quantitative measurements of amino acids in T1D poor control, good control, and controls. |
| Study Type | Quantitative measurements of amino acid |
| Study Summary | The 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. |
| Institute | Mayo Clinic |
| Department | Endocrinology |
| Laboratory | Mayo Clinic Metabolomics Resource Core |
| Last Name | Nair |
| First Name | Sreekumaran |
| Address | 200 First Street SW, Rochester, MN 55905 |
| Nair.K@mayo.edu | |
| Phone | 507-285-2415 |
| Submit Date | 2016-07-20 |
| Raw Data File Type(s) | raw(Thermo) |
| Analysis Type Detail | LC-MS |
| Release Date | 2016-09-23 |
| Release Version | 1 |
Select appropriate tab below to view additional metadata details:
Combined analysis:
| Analysis ID | AN000685 |
|---|---|
| Analysis type | MS |
| Chromatography type | Reversed phase |
| Chromatography system | Thermo TSQ Quantum Ultra |
| Column | Waters Acquity BEH C18 (150 x 2.1mm,1.7um) |
| MS Type | ESI |
| MS instrument type | Triple quadrupole |
| MS instrument name | Thermo Quantum Ultra |
| Ion Mode | POSITIVE |
| Units | micromolar |
Chromatography:
| Chromatography ID: | CH000497 |
| Chromatography Summary: | Plasma samples and amino acid calibration standards were prepared with MassTrak Amino Acid Analysis Solution (AAA) kit from Waters according to instructions with slight modifications for detection on a mass spectrometer. A 10 point standard concentration curve was made from the calibration standard solution to calculate amino acid concentrations in plasma samples. A solution containing U-13C4-L-aspartic acid, U-13C3-L-alanine, U-13C4-L-threonine, U-13C5-L-proline, U-13C5-L-valine, U-13C6-leucine, U-13C6-phenylalanine all from Cambridge Isotope Laboratories, 13C6-tyrosine from Isotec, L-arginine (15N2, 2H2) from MassTrace, norvaline from Sigma dissolved in 0.01N HCl was used as the internal standard solution. Frozen plasma samples were thawed, spiked with internal standard then deproteinized with cold MeOH followed by centrifugation at 10,000 g for 5 minutes prior to derivatization according to MassTrak instructions. The amino acid derivatizing reagent used was 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate. High resolution separation was done using an Acquity UPLC system, injecting 1 µl of derviatized solution, with a UPLC BEH C18 1.7 micron 2.1×150 mm column from Waters. Column flow was set to 400 µl/min with a gradient from 99.9%A to 98%B where buffer A is 1% acetonitrile in 0.1% formic acid and buffer B is 100% acetonitrile. A column temp of 43 degrees Celsius and a sample tray temp of 6% Celsius. Mass detection was completed on a TSQ Ultra Quantum from Thermo Finnigan running in ESI positive mode. A scan width of 0.002, scan time of 0.04 seconds per transition mass, collision energy of 25, collision gas pressure of 1.5 mTorr, tube lens value set to 90, monitoring a signature ion of the derivitized amines at m/z 171.04 by selected reaction monitoring. |
| Instrument Name: | Thermo TSQ Quantum Ultra |
| Column Name: | Waters Acquity BEH C18 (150 x 2.1mm,1.7um) |
| Column Temperature: | 43 |
| Flow Gradient: | from 99.9%A to 98%B |
| Flow Rate: | 400 µl/min |
| Solvent A: | 99% water/1% acetonitrile; 0.1% formic acid |
| Solvent B: | 100% acetonitrile |
| Chromatography Type: | Reversed phase |
