Summary of Study ST002826

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 PR001768. The data can be accessed directly via it's Project DOI: 10.21228/M85T5M 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.

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Study ID	ST002826
Study Title	Cold-stimulated brown adipose tissue activation is related to changes in serum metabolites relevant to NAD+ metabolism in humans
Study Summary	Cold-induced brown adipose tissue (BAT) activation is considered to improve metabolic health. In murine BAT, cold increases the fundamental molecule for mitochondrial function, nicotinamide adenine dinucleotide (NAD+), but limited knowledge on NAD+ metabolism during cold in human BAT metabolism exists. We show that cold increases the serum metabolites of the NAD+ salvage pathway (nicotinamide and 1-methylnicotinamide) in humans. Additionally, individuals with coldstimulated BAT activation have decreased levels of metabolites from the de novo NAD+ biosynthesis pathway (tryptophan, kynurenine). Serum nicotinamide correlates positively with cold-stimulated BAT activation, whereas tryptophan and kynurenine correlates negatively. Furthermore, the expression of genes involved in NAD+ biosynthesis in BAT are related to markers of metabolic health. Our data indicate that cold increases serum tryptophan conversion to nicotinamide to be further utilized by BAT. We conclude that NAD+ metabolism is activated upon cold in humans and probably regulated in a coordinated fashion by several tissues.
Institute	University of Turku
Last Name	Virtanen
First Name	Kirsi
Address	Turku PET Centre, Turku University Hospital, Turku, Finland
Email	kirsi.virtanen@utu.fi
Phone	+358-40-7626564
Submit Date	2023-08-10
Raw Data Available	Yes
Raw Data File Type(s)	d
Analysis Type Detail	LC-MS
Release Date	2023-09-11
Release Version	1

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Sample Preparation:

Sampleprep ID:	SP002941
Sampleprep Summary:	Fasting serum samples taken during the cold or RT exposures were stored at -80 °C and thawed in an ice water bath. Four hundred microliters of ice-cold acetonitrile (ACN) was pipetted to 96-well filter plates (Captiva ND Plate, 0.2 μm PP, Agilent Technologies, Santa Clara, CA, United States) after which 100 μL of plasma or quality control (QC) was added. The solution was mixed by pipetting up and down, filtrated by centrifugation (700 RCF, 4 °C, 5 min) and collected to a 96-1 well plate (96 deep well plate natural,Thermo Scientific). QC was serum sample prepared by pooling an aliquot from all analysed serum samples.

Sampleprep ID:

SP002941

Sampleprep Summary:

Fasting serum samples taken during the cold or RT exposures were stored at -80 °C and thawed in an ice water bath. Four hundred microliters of ice-cold acetonitrile (ACN) was pipetted to 96-well filter plates (Captiva ND Plate, 0.2 μm PP, Agilent Technologies, Santa Clara, CA, United States) after which 100 μL of plasma or quality control (QC) was added. The solution was mixed by pipetting up and down, filtrated by centrifugation (700 RCF, 4 °C, 5 min) and collected to a 96-1 well plate (96 deep well plate natural,Thermo Scientific). QC was serum sample prepared by pooling an aliquot from all analysed serum samples.