Universität zu Köln

Ulmer, Bastian ORCID: 0000-0002-0883-6481, Odenthal, Margarete ORCID: 0000-0002-2424-0960, Buettner, Reinhard, Roth, Wilfried and Kloth, Michael (2022). Diffusion kernel-based predictive modeling of KRAS dependency in KRAS wild type cancer cell lines. npj Syst. Biol. Appl., 8 (1). BERLIN: NATURE PORTFOLIO. ISSN 2056-7189

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Abstract

Recent progress in clinical development of KRAS inhibitors has raised interest in predicting the tumor dependency on frequently mutated RAS-pathway oncogenes. However, even without such activating mutations, RAS proteins represent core components in signal integration of several membrane-bound kinases. This raises the question of applications of specific inhibitors independent from the mutational status. Here, we examined CRISPR/RNAi data from over 700 cancer cell lines and identified a subset of cell lines without KRAS gain-of-function mutations (KRAS(wt)) which are dependent on KRAS expression. Combining machine learning-based modeling and whole transcriptome data with prior variable selection through protein-protein interaction network analysis by a diffusion kernel successfully predicted KRAS dependency in the KRAS(wt) subgroup and in all investigated cancer cell lines. In contrast, modeling by RAS activating events (RAE) or previously published RAS RNA-signatures did not provide reliable results, highlighting the heterogeneous distribution of RAE in KRAS(wt) cell lines and the importance of methodological references for expression signature modeling. Furthermore, we show that predictors of KRAS(wt) models contain non-substitutable information signals, indicating a KRAS dependency phenotype in the KRAS(wt) subgroup. Our data suggest that KRAS dependent cancers harboring KRAS wild type status could be targeted by directed therapeutic approaches. RNA-based machine learning models could help in identifying responsive and non-responsive tumors.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ulmer, Bastian UNSPECIFIED orcid.org/0000-0002-0883-6481 UNSPECIFIED Odenthal, Margarete UNSPECIFIED orcid.org/0000-0002-2424-0960 UNSPECIFIED Buettner, Reinhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Roth, Wilfried UNSPECIFIED UNSPECIFIED UNSPECIFIED Kloth, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-668083
DOI:	10.1038/s41540-021-00211-8
Journal or Publication Title:	npj Syst. Biol. Appl.
Volume:	8
Number:	1
Date:	2022
Publisher:	NATURE PORTFOLIO
Place of Publication:	BERLIN
ISSN:	2056-7189
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language UNCOMMON EGFR MUTATIONS; LUNG-CANCER; GENE AMPLIFICATION; EXPRESSION; LANDSCAPE; CHEMOTHERAPY; SENSITIVITY; CETUXIMAB; RESOURCE; IMPACT Multiple languages Mathematical & Computational Biology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66808