Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA206968

Local Sample ID:	190905_19_0009_UCLM_CCM_034
Subject ID:	SU002243
Subject Type:	Cultured cells
Subject Species:	Homo sapiens
Taxonomy ID:	9606
Gender:	Male
Cell Biosource Or Supplier:	CLS
Cell Strain Details:	In vitro spontaneously transformed keratinocytes from histologically normal skin
Cell Primary Immortalized:	HaCaT
Cell Passage Number:	Up to the 15th passage

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Sample Preparation:

Sampleprep ID:	SP002249
Sampleprep Summary:	Keratinocytes were defrosted on ice and proteins were precipitated from the lysed cell samples by adding the extraction solvent spiked with metabolites not detected in unspiked cell extracts. These metabolites, considered as internal standards, were tryptophan-d5, Anthranilic acid-(ring-13C6), Phenylthiohydantoin (PTH)-valine, Glycocholic-2,2,4,4-d4 acid (Sigma Aldrich). Then, cell extracts were incubated at -20 ˚C for 1 hour and after that, samples were vortexed and centrifuged at 18,000 x g for 10 minutes at 4 ºC. Supernatants were collected and kept on ice. A second extraction was performed from the remaining pellets, following the same steps described above. Supernatants obtained from the second extraction were collected and put together with the supernatants of the first extraction. Finally, these supernatants were dried under vacuum, reconstituted in water, resuspended with agitation for 10 minutes, centrifuged at 18,000 x g for 5 minutes at 4ºC, and transferred to vials for UHPLC-MS analysis.

Sampleprep ID:

SP002249

Sampleprep Summary:

Keratinocytes were defrosted on ice and proteins were precipitated from the lysed cell samples by adding the extraction solvent spiked with metabolites not detected in unspiked cell extracts. These metabolites, considered as internal standards, were tryptophan-d5, Anthranilic acid-(ring-13C6), Phenylthiohydantoin (PTH)-valine, Glycocholic-2,2,4,4-d4 acid (Sigma Aldrich). Then, cell extracts were incubated at -20 ˚C for 1 hour and after that, samples were vortexed and centrifuged at 18,000 x g for 10 minutes at 4 ºC. Supernatants were collected and kept on ice. A second extraction was performed from the remaining pellets, following the same steps described above. Supernatants obtained from the second extraction were collected and put together with the supernatants of the first extraction. Finally, these supernatants were dried under vacuum, reconstituted in water, resuspended with agitation for 10 minutes, centrifuged at 18,000 x g for 5 minutes at 4ºC, and transferred to vials for UHPLC-MS analysis.