Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA027994

Local Sample ID:	532
Subject ID:	SU000562
Subject Type:	mice
Subject Species:	Mus musculus
Taxonomy ID:	10090
Genotype Strain:	C57BL/6
Gender:	Male
Species Group:	Mammal

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Sample Preparation:

Sampleprep ID:	SP000569
Sampleprep Summary:	Frozen kidney tissue samples on dry ice were transferred to pre-chilled, pre-labeled tubes, and their weights recorded. For every 1 mg of tissue sample, 2 µL of 50:50 Acetonitrile:Water was added to the tube. Ceramic beads (2.3 mm; ~15-20 prewashed & dried) were added to the tubes, and the samples were homogenized on the MagNA Lyser system using a 30 s pulse at 4,000 rpm. The samples were centrifuged at room temperature at 16,000 rcf for 4 min. An aliquot of the supernatant was transferred to pre-labeled 2.0 mL low protein-binding microcentrifuge tube to make the individual study sample (40 µL). Another aliquot of supernatant (18 µL) was combined with those from all other kidney tissue samples in a 1.5 mL low protein-binding microcentrifuge tube to make the total pool quality control sample. The total pool quality control sample was aliquoted (40 µL) to make 4 Total Pool Samples and 4 Column Equilibration samples. 132 µL of the total pool quality control sample was added to the total study sample pool to make a pool of kidney, urine, and plasma samples. The total study pool sample was used to prepare 9 Total Study Samples (40 µL) to aid in alignment of the three studies. Of these, 3 total study samples were included in the kidney tissue analysis. Acetonitrile containing the internal standard Tryptophan-d5 (460 µL; 0.0125 mg/ml) was added to all samples, and samples were vortexed on a multiple tube vortexer for 2 min at 5000 rpm followed by centrifugation at 16,000 rcf for 4 min. The supernatants (420 µL) were transferred into new, pre-labeled 2.0 mL low protein-binding microcentrifuge tubes and capped with disposable rubber stoppers. Samples were placed at -80 °C for 1.5 h and lyophilized for 18 h. Acetonitrile:Water (150 µL; 95:5) was added to each tube and vortex mixed for 10 min at 5000 rpm, followed by centrifugation at room temperature at 16,000 rcf for 4 min. The supernatants were transferred to pre-labeled autosampler vials and 3 µL was injected into SYNAPT G2 Si.

Sampleprep ID:

SP000569

Sampleprep Summary:

Frozen kidney tissue samples on dry ice were transferred to pre-chilled, pre-labeled tubes, and their weights recorded. For every 1 mg of tissue sample, 2 µL of 50:50 Acetonitrile:Water was added to the tube. Ceramic beads (2.3 mm; ~15-20 prewashed & dried) were added to the tubes, and the samples were homogenized on the MagNA Lyser system using a 30 s pulse at 4,000 rpm. The samples were centrifuged at room temperature at 16,000 rcf for 4 min. An aliquot of the supernatant was transferred to pre-labeled 2.0 mL low protein-binding microcentrifuge tube to make the individual study sample (40 µL). Another aliquot of supernatant (18 µL) was combined with those from all other kidney tissue samples in a 1.5 mL low protein-binding microcentrifuge tube to make the total pool quality control sample. The total pool quality control sample was aliquoted (40 µL) to make 4 Total Pool Samples and 4 Column Equilibration samples. 132 µL of the total pool quality control sample was added to the total study sample pool to make a pool of kidney, urine, and plasma samples. The total study pool sample was used to prepare 9 Total Study Samples (40 µL) to aid in alignment of the three studies. Of these, 3 total study samples were included in the kidney tissue analysis. Acetonitrile containing the internal standard Tryptophan-d5 (460 µL; 0.0125 mg/ml) was added to all samples, and samples were vortexed on a multiple tube vortexer for 2 min at 5000 rpm followed by centrifugation at 16,000 rcf for 4 min. The supernatants (420 µL) were transferred into new, pre-labeled 2.0 mL low protein-binding microcentrifuge tubes and capped with disposable rubber stoppers. Samples were placed at -80 °C for 1.5 h and lyophilized for 18 h. Acetonitrile:Water (150 µL; 95:5) was added to each tube and vortex mixed for 10 min at 5000 rpm, followed by centrifugation at room temperature at 16,000 rcf for 4 min. The supernatants were transferred to pre-labeled autosampler vials and 3 µL was injected into SYNAPT G2 Si.