Summary of Study ST002002

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 PR001269. The data can be accessed directly via it's Project DOI: 10.21228/M8PD9N This work is supported by NIH grant, U2C- DK119886.

See: https://www.metabolomicsworkbench.org/about/howtocite.php

Study ID	ST002002
Study Title	A case-control study on plasma metabolomics analysis in Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) (Part 3)
Study Summary	Targeted and untargeted metabolomics analysis consisting of 888 metabolic analytes covering primary metabolites, biogenic amines, complex lipids, and oxylipins in 106 ME/CFS cases and 91 frequency-matched healthy controls.
Institute	Columbia University
Department	Center for Infection and Immunity
Laboratory	Center for Infection and Immunity
Last Name	Lipkin
First Name	W. Ian
Address	722 W. 168th St., 17th Floor, New York, NY, 10032
Email	wil2001@cumc.columbia.edu
Phone	212-342-9033
Submit Date	2021-11-23
Raw Data Available	Yes
Raw Data File Type(s)	d
Analysis Type Detail	LC-MS
Release Date	2021-12-08
Release Version	1

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Sample Preparation:

Sampleprep ID:	SP002089
Sampleprep Summary:	Extraction of plasma lipids is based on the “Maytash'' method [1] which was subsequently modified. Extraction is carried out using a bi-phasic solvent system of cold methanol, methyl tert-butyl ether (MTBE), and water. In more detail, cold methanol (225 µL) containing a mixture of odd chain and deuterated lipid internal standards [lysoPE(17:1), lysoPC(17:0), PC(12:0/13:0), PE(17:0/17:0), PG(17:0/17:0), sphingosine (d17:1), d7-cholesterol, SM(17:0), C17 ceramide, d3-palmitic acid, MG(17:0/0:0/0:0), DG(18:1/2:0/0:0), DG(12:0/12:0/0:0), and d5-TG(17:0/17:1/17:0)] is added to a 20 µL sample aliquot, which is placed into a 1.5 mL Eppendorf tube, and the tube is vortexed for 10 s. Then, 750 µL of cold MTBE containing CE(22:1) (internal standard) are added, followed by vortexing for 10 s. and shaking for 6 min. at 4ºC. Phase separation is induced by adding 188 µL of mass spec-grade water. After vortexing for 20 s. The sample is centrifuged at 14,000 rpm for 2 min. The upper organic phase is collected in two 300 µL aliquots. One is stored at -20ºC as a backup and the other is evaporated to dryness in a SpeedVac. Dried extracts are resuspended using a mixture of methanol/toluene (9:1, v/v) (60 µL) containing an internal standard [12-[[(cyclohexylamino)carbonyl]amino]-dodecanoic acid (CUDA)] used as a quality control.

Sampleprep ID:

SP002089

Sampleprep Summary:

Extraction of plasma lipids is based on the “Maytash'' method [1] which was subsequently modified. Extraction is carried out using a bi-phasic solvent system of cold methanol, methyl tert-butyl ether (MTBE), and water. In more detail, cold methanol (225 µL) containing a mixture of odd chain and deuterated lipid internal standards [lysoPE(17:1), lysoPC(17:0), PC(12:0/13:0), PE(17:0/17:0), PG(17:0/17:0), sphingosine (d17:1), d7-cholesterol, SM(17:0), C17 ceramide, d3-palmitic acid, MG(17:0/0:0/0:0), DG(18:1/2:0/0:0), DG(12:0/12:0/0:0), and d5-TG(17:0/17:1/17:0)] is added to a 20 µL sample aliquot, which is placed into a 1.5 mL Eppendorf tube, and the tube is vortexed for 10 s. Then, 750 µL of cold MTBE containing CE(22:1) (internal standard) are added, followed by vortexing for 10 s. and shaking for 6 min. at 4ºC. Phase separation is induced by adding 188 µL of mass spec-grade water. After vortexing for 20 s. The sample is centrifuged at 14,000 rpm for 2 min. The upper organic phase is collected in two 300 µL aliquots. One is stored at -20ºC as a backup and the other is evaporated to dryness in a SpeedVac. Dried extracts are resuspended using a mixture of methanol/toluene (9:1, v/v) (60 µL) containing an internal standard [12-[[(cyclohexylamino)carbonyl]amino]-dodecanoic acid (CUDA)] used as a quality control.