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- W3201403209 abstract "SUMMARY Metabolic reprogramming is critical for tumor initiation and progression. However, the exact impact of specific metabolic changes on cancer progression is poorly understood. Here, we combined multi-omics datasets of primary and metastatic clonally related clear cell renal cancer cells (ccRCC) and generated a computational tool to explore the metabolic landscape during cancer progression. We show that a VHL loss-dependent reprogramming of branched-chain amino acid catabolism is required to maintain the aspartate pool in cancer cells across all tumor stages. We also provide evidence that metastatic renal cancer cells reactivate argininosuccinate synthase (ASS1), a urea cycle enzyme suppressed in primary ccRCC, to enable invasion in vitro and metastasis in vivo . Overall, our study provides the first comprehensive elucidation of the molecular mechanisms responsible for metabolic flexibility in ccRCC, paving the way to the development of therapeutic strategies based on the specific metabolism that characterizes each tumor stage. Highlights Branched-chain amino acids catabolism is reprogrammed in ccRCC tumors BCAT-dependent transamination supplies nitrogen for de novo biosynthesis of amino acids including aspartate and asparagine in ccRCC Aspartate produced downstream of BCAT is used specifically by metastatic cells through argininosuccinate synthase (ASS1) and argininosuccinate lyase (ASL) to generate arginine, providing a survival advantage in the presence of microenvironments with rate limiting levels of arginine ASS1 is re-expressed in metastatic 786-M1A through epigenetic remodeling and it is sensitive to arginine levels Silencing of ASS1 impairs the metastatic potential in vitro and in vivo of ccRCC cells" @default.
- W3201403209 created "2021-09-27" @default.
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- W3201403209 date "2021-09-18" @default.
- W3201403209 modified "2023-10-01" @default.
- W3201403209 title "Nitrogen partitioning between branched-chain amino acids and urea cycle enzymes sustains renal cancer progression" @default.
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- W3201403209 doi "https://doi.org/10.1101/2021.09.17.460635" @default.
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