Summary of Study ST003272

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 PR002030. The data can be accessed directly via it's Project DOI: 10.21228/M86V58 This work is supported by NIH grant, U2C- DK119886.

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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 IDST003272
Study TitleImpact of serine supplementation following treatment with serine/glycine-depleted diet: Retina and back of eye samples
Study SummaryWe analyzed metabolites in the retina, choroid/RPE, plasma, and paw skin from mice that were previously on control or serine/glycine-depleted diet and then switched over to a control or serine-supplemented diet. This study contains retina and back of eye samples.
Institute
Salk Institute for Biological Studies
DepartmentMolecular and Cell Biology Laboratory
LaboratoryMetallo Lab
Last NameLim
First NameEsther
Address10010 N Torrey Pines Rd
Emailewlim2024@gmail.com
Phone(858) 453-4100
Submit Date2024-06-15
Num Groups4
Total Subjects20
Num Males20
Raw Data AvailableYes
Raw Data File Type(s)d
Analysis Type DetailLC-MS
Release Date2024-07-10
Release Version1
Esther Lim Esther Lim
https://dx.doi.org/10.21228/M86V58
ftp://www.metabolomicsworkbench.org/Studies/ application/zip

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Sample Preparation:

Sampleprep ID:SP003399
Sampleprep Summary:For sphingolipid extraction from retina and choroid/RPE, frozen tissue was homogenized with a ball mill (Retsch Mixer Mill MM 400) at 30 Hz for 3 min in 500 μl of −20°C methanol, 400 μl of ice-cold saline, and 100 μl of ice-cold MilliQ water, spiked with deuterated internal standards as described earlier. The mixture was then transferred into a 2-ml Eppendorf tube containing 1 ml of chloroform. The tubes were vortexed for 5 min and centrifuged at 16,000g at 4°C for 5 min. The lower organic phase was collected, and 2 μl of formic acid was added to the remaining polar phase, which was re-extracted with 1 ml of chloroform. Combined organic phases were dried and resuspended in 50 μl of 0.2% formic acid and 1 mM ammonium formate in methanol. Last, the tubes were sonicated in a bath sonicator for 10 min and spun at 16,000g for 10 min at 4°C. For plasma, 50 μl of plasma was extracted with 500 μl of −20°C methanol, 400 μl of saline, and 100 μl of water spiked with deuterated internal standards. Chloroform (1 ml) was then added to the tubes. The tubes were vortexed for 5 min and centrifuged at 16,000g at 4°C for 5 min. The lower organic phase was collected, and 2 μl of formic acid was added to the remaining polar phase, which was reextracted with 1 ml of chloroform. Combined organic phases were dried and resuspended in 100 μl of 0.2% formic acid and 1 mM ammonium formate in methanol. Next, the tubes were sonicated in a bath sonicator for 10 min and spun at 16,000g for 10 min at 4°C.
Processing Storage Conditions:Room temperature
Extract Storage:4℃
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