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Multiplexed screens identify RAS paralogues HRAS and NRAS as suppressors of KRAS-driven lung cancer growth
Journal article   Open access   Peer reviewed

Multiplexed screens identify RAS paralogues HRAS and NRAS as suppressors of KRAS-driven lung cancer growth

Rui Tang, Emily G Shuldiner, Marcus Kelly, Christopher W Murray, Jess D Hebert, Laura Andrejka, Min K Tsai, Nicholas W Hughes, Mitchell I Parker, Hongchen Cai, …
Nature cell biology, v 25(1)
Jan 2023
PMID: 36635501
url
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10521195View
SubmittedCC BY V4.0 Open

Abstract

Animals Cell Transformation, Neoplastic - metabolism Genes, ras GTP Phosphohydrolases - genetics GTP Phosphohydrolases - metabolism Humans Lung Neoplasms - genetics Membrane Proteins - genetics Membrane Proteins - metabolism Mice Mutation Proto-Oncogene Proteins p21(ras) - genetics Proto-Oncogene Proteins p21(ras) - metabolism Signal Transduction - genetics
Oncogenic KRAS mutations occur in approximately 30% of lung adenocarcinoma. Despite several decades of effort, oncogenic KRAS-driven lung cancer remains difficult to treat, and our understanding of the regulators of RAS signalling is incomplete. Here to uncover the impact of diverse KRAS-interacting proteins on lung cancer growth, we combined multiplexed somatic CRISPR/Cas9-based genome editing in genetically engineered mouse models with tumour barcoding and high-throughput barcode sequencing. Through a series of CRISPR/Cas9 screens in autochthonous lung cancer models, we show that HRAS and NRAS are suppressors of KRAS -driven tumour growth in vivo and confirm these effects in oncogenic KRAS-driven human lung cancer cell lines. Mechanistically, RAS paralogues interact with oncogenic KRAS, suppress KRAS-KRAS interactions, and reduce downstream ERK signalling. Furthermore, HRAS and NRAS mutations identified in oncogenic KRAS-driven human tumours partially abolished this effect. By comparing the tumour-suppressive effects of HRAS and NRAS in oncogenic KRAS- and oncogenic BRAF-driven lung cancer models, we confirm that RAS paralogues are specific suppressors of KRAS-driven lung cancer in vivo. Our study outlines a technological avenue to uncover positive and negative regulators of oncogenic KRAS-driven cancer in a multiplexed manner in vivo and highlights the role RAS paralogue imbalance in oncogenic KRAS-driven lung cancer.

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Collaboration types
Domestic collaboration
Web of Science research areas
Cell Biology
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