Summary of Study ST001665
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 PR001070. The data can be accessed directly via it's Project DOI: 10.21228/M8D12Q This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
Study ID | ST001665 |
Study Title | Branched-chain alpha-ketoacids are preferentially reaminated and activate protein synthesis in the rat heart |
Study Summary | Branched-chain amino acids (BCAA) and their cognate α-ketoacids (BCKA) are elevated in an array of cardiometabolic diseases. Here we demonstrate that the major metabolic fate of uniformly-13C-labeled α-ketoisovalerate ([U-13C]KIV) in the heart is reamination to valine. Activation of cardiac branched-chain α-ketoacid dehydrogenase (BCKDH) by treatment with the BCKDH kinase inhibitor, BT2, does not impede the strong flux of [U-13C]KIV to valine. |
Institute | Duke University |
Last Name | Walejko |
First Name | Jacquelyn |
Address | 300 N Duke St |
jacquelyn.walejko@duke.edu | |
Phone | 9194792304 |
Submit Date | 2021-01-26 |
Analysis Type Detail | GC-MS |
Release Date | 2021-02-17 |
Release Version | 1 |
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Sample Preparation:
Sampleprep ID: | SP001748 |
Sampleprep Summary: | Frozen tissues were pulverized under liquid nitrogen using a mortar and pestle. Metabolites were then extracted using sequential 500 μL additions of -20°C MeOH, chilled water, and chloroform. After each addition, tissue lysates were prepared with a Tissue Lyser (Qiagen) for 60 seconds at 30Hz. Similarly, plasma metabolites (20 μL) were extracted by sequential 500 μL additions of -20°C MeOH, chilled water, and chloroform. After each addition, samples were vortexed for 30 seconds. Tissue and plasma extracts were then centrifuged at 4°C and 14400 x g for 20 minutes and the clarified aqueous phase was transferred to a fresh Eppendorf and stored in -80°C until processing for GC-MS analysis. For GC-MS analysis, the extracted tissue was dried under N2 gas-flow at 37°C using an evaporator. Amino and organic acids were derivatized via methoximation and silylation. Briefly, metabolites were resuspended in 25 μL of methoxylamine hydrochloride (2% (w/v) in pyridine) and incubated at 40°C for 90 minutes on a heating block. After brief centrifugation, 35 μL of MTBSTFA + 1% TBDMS was added and the samples were incubated at 60°C for 30 minutes. |