Summary of Study ST001658

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench,, where it has been assigned Project ID PR001063. The data can be accessed directly via it's Project DOI: 10.21228/M89695 This work is supported by NIH grant, U2C- DK119886.


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 IDST001658
Study TitleControl of Topoisomerase II Activity and Chemotherapeutic Inhibition by TCA Cycle Metabolites
Study SummaryTopoisomerase II (topo II) is essential for disentangling newly-replicated chromosomes. DNA unlinking involves the physical passage of one DNA duplex through another and depends on the transient formation of double-strand DNA breaks, a step exploited by frontline chemotherapies to kill cancer cells. Although anti-topo II drugs are efficacious, they also elicit cytotoxic side effects in normal cells; insights into how topo II is regulated in different cellular contexts is essential to improve their targeted use. Using chemical fractionation and mass spectrometry, we have discovered that topo II is subject to metabolic control through the TCA cycle. We show that TCA metabolites stimulate topo II activity in vitro and that levels of TCA flux modulate cellular sensitivity to anti-topo II drugs in vivo. Our works reveals an unanticipated connection between the control of DNA topology and cellular metabolism, a finding with important ramifications for the clinical use of anti-topo II therapies.
Johns Hopkins University
Last NameMosher
First NameEric
Address725 North Wolfe Street, Biophysics 307
Submit Date2021-01-21
Raw Data AvailableYes
Raw Data File Type(s)mzML
Analysis Type DetailLC-MS
Release Date2021-02-17
Release Version1
Eric Mosher Eric Mosher application/zip

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Collection ID:CO001728
Collection Summary:Yeast cultures were grown in SC-sulfate media and were harvested at OD600 0.4-0.8 by vacuum filtration then washed with 100mM ammonium acetate - TEA (pH 8.0). Metabolites were extracted by the addition of pre-chilled 10mL 90% methanol, 10mM ammonium acetate - TEA (pH 8.0). Cell debris was removed by centrifugation at 4000g for 10-15 minutes. Extracts were subsequently passed through 3 kDa MWCO filters. Filtrate was diluted 2-fold with water and lyophilized. Lyophilized metabolite extracts were resuspended with water and pH was adjusted to 10 with TEA. The extract was then passed through a mixed-mode anion exchange solid phase extraction cartridge and fractionated by reverse-phase HPLC on a C18 column. One column volume of water plus 0.1% formic acid and eight column volumes of methanol were passed through the column. Fractions that eluted during the aqueous phase were then lyophilized.
Sample Type:Yeast cells