Summary of Study ST003113
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 PR001933. The data can be accessed directly via it's Project DOI: 10.21228/M8VM8W This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
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.
| Study ID | ST003113 |
| Study Title | Inhibition of Asparagine Synthetase Effectively Retards Polycystic Kidney Disease Progression, investigated with targeted tracing metabolomics analysis in MEF cells using 15N2-glutamine. |
| Study Summary | Polycystic Kidney Disease (PKD) is a genetic disorder characterized by bilateral cyst formation. We showed that PKD cells and kidneys display metabolic alterations, including the Warburg effect and glutaminolysis, sustained in vitro by the enzyme asparagine synthetase (ASNS). Here, we used antisense oligonucleotides (ASO) against Asns in orthologous and slowly progressive PKD murine models and show that treatment leads to a drastic reduction of total kidney volume (measured by MRI) and a prominent rescue of renal function in the mouse. Mechanistically, the upregulation of an ATF4-ASNS axis in PKD is driven by the amino acid response (AAR) branch of the integrated stress response (ISR). Metabolic profiling of PKD or control kidneys treated with Asns-ASO or Scr-ASO revealed major changes in the mutants, several of which are rescued by Asns silencing in vivo. Indeed, ASNS drives glutamine-dependent de novo pyrimidine synthesis and proliferation in cystic epithelia. Notably, while several metabolic pathways were completely corrected by Asns-ASO, glycolysis was only partially restored. Accordingly, combining the glycolytic inhibitor 2DG with Asns-ASO further improved efficacy. Our studies identify a new therapeutic target and novel metabolic vulnerabilities in PKD. Of interest, in these tracing studies we could confirm that the pyrimidine biosynthesis pathway is increased and rescued by silencing of Asns. |
| Institute | San Raffaele University |
| Last Name | Stefanoni |
| First Name | Davide |
| Address | Via Olgettina 58, Milan, Milan, 20132, Italy |
| stefanoni.davide@hsr.it | |
| Phone | +393337686005 |
| Submit Date | 2024-02-28 |
| Raw Data Available | Yes |
| Raw Data File Type(s) | raw(Thermo) |
| Analysis Type Detail | LC-MS |
| Release Date | 2024-04-30 |
| Release Version | 1 |
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Sample Preparation:
| Sampleprep ID: | SP003235 |
| Sampleprep Summary: | Metabolites from equal amounts of frontal cortex tissue were rapidly extracted in 80% ice-cold methanol. Extracted samples were vortexed twice, cleared by centrifugation at 14,000 x g for 20 minutes at 4°C, and stored at -80°C. |
| Sampleprep ID: | SP003236 |
| Sampleprep Summary: | MEF cells samples were extracted in a ratio of 1milion/1mL of ice cold extraction solution (methanol:acetonitrile:water 5:3:2 v/v/v). Suspensions were vortexed continuously for 30 min at 4°C. Insoluble material was removed by centrifugation at 18,000 g for 10 min at 4°C and supernatants were isolated for metabolomics analysis by UHPLC-MS. |
