Summary of Study ST002874

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 PR001796. The data can be accessed directly via it's Project DOI: 10.21228/M8JX52 This work is supported by NIH grant, U2C- DK119886.

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

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.

Study ID	ST002874
Study Title	Quantification of metabolites in kynurenine pathway
Study Summary	Urine samples were collected from two independent cohorts. Patients with LN were classified into proliferative (class III/IV) and membranous (class V) by kidney histopathology. Quantification of metabolites in kynurenine pathway was performed using LC-MS/MS.
Institute	Mahidol University
Department	Siriraj Metabolomics and Phenomics Center
Laboratory	Siriraj Center of Research Excellence in Metabolomics and Systems Biology
Last Name	Khoomrung
First Name	Sakda
Address	2 Wanglang Road Bangkoknoi, Bangkok 10700, Thailand
Email	sakda.kho@mahidol.edu
Phone	024195511
Submit Date	2023-09-25
Num Groups	2
Total Subjects	117
Publications	https://doi.org/10.1016/j.isci.2021.103355
Raw Data Available	Yes
Raw Data File Type(s)	raw(Waters)
Analysis Type Detail	LC-MS
Release Date	2023-10-10
Release Version	1

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Sample Preparation:

Sampleprep ID:	SP002993
Sampleprep Summary:	The urine samples were prepared based on a previously published protocol (Zhu et al., 2019) with minor modifications. Briefly, a 50 μL of each urine sample was mixed with 200 μL of MeOH/ACN (1:1, v/v) containing 100 ng of anthranilic acid C13 (Ant-C13) as an internal standard (IS). The mixture was vortexed for 30 s and sonicated for 10 min (room temperature). The mixture was then left overnight (−20°C) for protein precipitation before centrifugation at 13,000 rpm (4°C) for 15 min. The supernatant was transferred to a new test tube and evaporated to dryness (room temperature) using a vacuum concentrator (Labconco, MO, USA). The dried sample was reconstituted in 100 μL of Milli-Q H2O (containing 0.1% formic acid), vortexed for 30 s, and sonicated (room temperature) for 10 min. The reconstituted sample was centrifuged at 13,000 rpm (4°C) for 15 min. The supernatant was kept at −80°C before analysis.

Sampleprep ID:

SP002993

Sampleprep Summary:

The urine samples were prepared based on a previously published protocol (Zhu et al., 2019) with minor modifications. Briefly, a 50 μL of each urine sample was mixed with 200 μL of MeOH/ACN (1:1, v/v) containing 100 ng of anthranilic acid C13 (Ant-C13) as an internal standard (IS). The mixture was vortexed for 30 s and sonicated for 10 min (room temperature). The mixture was then left overnight (−20°C) for protein precipitation before centrifugation at 13,000 rpm (4°C) for 15 min. The supernatant was transferred to a new test tube and evaporated to dryness (room temperature) using a vacuum concentrator (Labconco, MO, USA). The dried sample was reconstituted in 100 μL of Milli-Q H2O (containing 0.1% formic acid), vortexed for 30 s, and sonicated (room temperature) for 10 min. The reconstituted sample was centrifuged at 13,000 rpm (4°C) for 15 min. The supernatant was kept at −80°C before analysis.