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The amino acid transporter SLC7A5 is required for efficient growth of KRAS-mutant colorectal cancer
- Source :
- Nature genetics. 53(1)
- Publication Year :
- 2020
-
Abstract
- Oncogenic KRAS mutations and inactivation of the APC tumor suppressor co-occur in colorectal cancer (CRC). Despite efforts to target mutant KRAS directly, most therapeutic approaches focus on downstream pathways, albeit with limited efficacy. Moreover, mutant KRAS alters the basal metabolism of cancer cells, increasing glutamine utilization to support proliferation. We show that concomitant mutation of Apc and Kras in the mouse intestinal epithelium profoundly rewires metabolism, increasing glutamine consumption. Furthermore, SLC7A5, a glutamine antiporter, is critical for colorectal tumorigenesis in models of both early- and late-stage metastatic disease. Mechanistically, SLC7A5 maintains intracellular amino acid levels following KRAS activation through transcriptional and metabolic reprogramming. This supports the increased demand for bulk protein synthesis that underpins the enhanced proliferation of KRAS-mutant cells. Moreover, targeting protein synthesis, via inhibition of the mTORC1 regulator, together with Slc7a5 deletion abrogates the growth of established Kras-mutant tumors. Together, these data suggest SLC7A5 as an attractive target for therapy-resistant KRAS-mutant CRC.
- Subjects :
- Amino Acid Transport System ASC
Carcinogenesis
Glutamine
TOR Serine-Threonine Kinases
Kaplan-Meier Estimate
Oncogenes
Mechanistic Target of Rapamycin Complex 1
Large Neutral Amino Acid-Transporter 1
Gene Expression Regulation, Neoplastic
Mice, Inbred C57BL
Minor Histocompatibility Antigens
Proto-Oncogene Proteins p21(ras)
Mutation
Animals
Humans
RNA, Messenger
Intestinal Mucosa
Neoplasm Metastasis
5' Untranslated Regions
Colorectal Neoplasms
Cell Proliferation
Signal Transduction
Subjects
Details
- ISSN :
- 15461718
- Volume :
- 53
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Nature genetics
- Accession number :
- edsair.pmid..........29a2d5b8068b33363261d1ba11cd5945