Abstract:
:Treating KRAS-mutant lung adenocarcinoma (LUAD) remains a major challenge in cancer treatment given the difficulties associated with directly inhibiting the KRAS oncoprotein. One approach to addressing this challenge is to define mutations that frequently co-occur with those in KRAS, which themselves may lead to therapeutic vulnerabilities in tumors. Approximately 20% of KRAS-mutant LUAD tumors carry loss-of-function mutations in the KEAP1 gene encoding Kelch-like ECH-associated protein 1 (refs. 2, 3, 4), a negative regulator of nuclear factor erythroid 2-like 2 (NFE2L2; hereafter NRF2), which is the master transcriptional regulator of the endogenous antioxidant response. The high frequency of mutations in KEAP1 suggests an important role for the oxidative stress response in lung tumorigenesis. Using a CRISPR-Cas9-based approach in a mouse model of KRAS-driven LUAD, we examined the effects of Keap1 loss in lung cancer progression. We show that loss of Keap1 hyperactivates NRF2 and promotes KRAS-driven LUAD in mice. Through a combination of CRISPR-Cas9-based genetic screening and metabolomic analyses, we show that Keap1- or Nrf2-mutant cancers are dependent on increased glutaminolysis, and this property can be therapeutically exploited through the pharmacological inhibition of glutaminase. Finally, we provide a rationale for stratification of human patients with lung cancer harboring KRAS/KEAP1- or KRAS/NRF2-mutant lung tumors as likely to respond to glutaminase inhibition.
journal_name
Nat Medjournal_title
Nature medicineauthors
Romero R,Sayin VI,Davidson SM,Bauer MR,Singh SX,LeBoeuf SE,Karakousi TR,Ellis DC,Bhutkar A,Sánchez-Rivera FJ,Subbaraj L,Martinez B,Bronson RT,Prigge JR,Schmidt EE,Thomas CJ,Goparaju C,Davies A,Dolgalev I,Heguy A,Adoi
10.1038/nm.4407subject
Has Abstractpub_date
2017-11-01 00:00:00pages
1362-1368issue
11eissn
1078-8956issn
1546-170Xpii
nm.4407journal_volume
23pub_type
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