Summary of Study ST001933

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 PR001222. The data can be accessed directly via it's Project DOI: 10.21228/M8RH8X This work is supported by NIH grant, U2C- DK119886.


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.

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Study IDST001933
Study TitleAbsolute quantification of plasma cytokines and metabolome reveals the glycylproline regulating antibody-fading in convalescent COVID-19 patients
Study SummaryCOVID-19 pandemic has caused tremendous costs worldwide and is still threatening public health in the “new normal”. The association between neutralizing antibody levels and metabolic alterations in convalescent patients with COVID-19 is still poorly understood. In the present work, we conducted absolutely quantitative approach to profile the metabolomes in the plasma of the ordinary convalescent patients with antibody (CA), the convalescents of rapidly faded antibodies (CO) as well as the healthy subjects.
Hong Kong Baptist University
Last NameYang
First NameZhu
AddressOEW901, Oen Hall Building West Wing,, Ho Sin Hang Campus, Hong Kong Baptist University, Kowloon Tong, Kowloon, 999077, Hong Kong
Submit Date2021-09-30
Raw Data AvailableYes
Raw Data File Type(s)mzML
Analysis Type DetailLC-MS
Release Date2022-07-25
Release Version1
Zhu Yang Zhu Yang application/zip

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Sample Preparation:

Sampleprep ID:SP002017
Sampleprep Summary:Metabolomics of plasma samples were prepared and quantified as according to previously described method with modification. In brief, the standard solutions (5.0 mg/mL) were made by dissolving the accurately weighed chemicals in appropriate solutions including water, methanol, sodium hydroxide solution, or hydrochloric acid solution. Then the stock calibration solutions were mixed from the appropriate amounts of individual stock solutions following the instruction of the manufacturer. After thawing at 4°C, 20-μL aliquots of the samples were added to a 96-well plate. Also were added to the plate the calibration solutions of eight various concentrations, quality control (QC) samples (equally mixed samples), as well as solvent blank. Then 120 μL of standard solution was added to each well. The microporous plate was covered with aluminum film, placed on constant temperature mixer, and vibrated at 10℃, 650rpm for 20min. After centrifugation at 4000g for 20 min, 30μl supernatant from each well was transferred to a new 96-well plate. The derivative reagents of Q300 Kit were added to all wells and the plate was covered and incubated at 1200 rpm at 30℃ to carry out derivatization for 60 min. After derivatization, 330 μL of precooled 50% methanol solution was added to each well and mixed with the samples at 1200 rpm at 10℃ for 5 minutes. Then the plat were centrifuged at 4000g, 4°C for 30 minutes. Finally, the supernatant was further transferred to a new 96-well plate and put into the automatic sampler of UPLC-MS analysis.