Skip to main content

Research Repository

Advanced Search

A KRAS-responsive long non-coding RNA controls microRNA processing

Shi, Lei; Magee, Peter; Fassan, Matteo; Sahoo, Sudhakar; Leong, Hui Sun; Lee, Dave; Sellers, Robert; Brulle-Soumare, Laura; Cairo, Stefano; Monteverde, Tiziana; Volinia, Stefano; Smith, Duncan D.; Di Leva, Gianpiero; Galuppini, Francesca; Paliouras, Athanasios R.; Zeng, Kang; O'Keefe, Raymond; Garofalo, Michela

A KRAS-responsive long non-coding RNA controls microRNA processing Thumbnail


Authors

Lei Shi

Peter Magee

Matteo Fassan

Sudhakar Sahoo

Hui Sun Leong

Dave Lee

Robert Sellers

Laura Brulle-Soumare

Stefano Cairo

Tiziana Monteverde

Stefano Volinia

Duncan D. Smith

Francesca Galuppini

Athanasios R. Paliouras

Kang Zeng

Raymond O'Keefe

Michela Garofalo



Abstract

Wild-type KRAS (KRASWT) amplification has been shown to be a secondary means of KRAS activation in cancer and associated with poor survival. Nevertheless, the precise role of KRASWT overexpression in lung cancer progression is largely unexplored. Here, we identify and characterize a KRAS-responsive lncRNA, KIMAT1 (ENSG00000228709) and show that it correlates with KRAS levels both in cell lines and in lung cancer specimens. Mechanistically, KIMAT1 is a MYC target and drives lung tumorigenesis by promoting the processing of oncogenic microRNAs (miRNAs) through DHX9 and NPM1 stabilization while halting the biogenesis of miRNAs with tumor suppressor function via MYC-dependent silencing of p21, a component of the Microprocessor Complex. KIMAT1 knockdown suppresses not only KRAS expression but also KRAS downstream signaling, thereby arresting lung cancer growth in vitro and in vivo. Taken together, this study uncovers a role for KIMAT1 in maintaining a positive feedback loop that sustains KRAS signaling during lung cancer progression and provides a proof of principle that interfering with KIMAT1 could be a strategy to hamper KRAS-induced tumorigenesis.

Journal Article Type Article
Acceptance Date Mar 2, 2021
Publication Date Apr 1, 2021
Journal Nature Communications
Print ISSN 2041-1723
Peer Reviewed Peer Reviewed
Volume 12
Article Number 2038
DOI https://doi.org/10.1038/s41467-021-22337-3
Keywords Long non-coding RNAs; Non-small-cell lung cancer
Publisher URL https://www.nature.com/articles/s41467-021-22337-3

Files




You might also like



Downloadable Citations