Proteogenomic Network Analysis of Context-Specific KRAS Signaling in Mouse-to-Human Cross-Species Translation

Overview

Journal Cell Syst

Publisher Cell Press

Specialties Biology
Cell Biology
Molecular Biology

Date 2019 Sep 16

PMID 31521603

Citations 33

Authors

Douglas K Brubaker

Joao A Paulo

Shikha Sheth

Emily J Poulin

Olesja Popow

Brian A Joughin

Samantha Dale Strasser

Alina Starchenko

Steven P Gygi

Douglas A Lauffenburger

Kevin M Haigis

Affiliations

Soon will be listed here.

Abstract

The highest frequencies of KRAS mutations occur in colorectal carcinoma (CRC) and pancreatic ductal adenocarcinoma (PDAC). The ability to target downstream pathways mediating KRAS oncogenicity is limited by an incomplete understanding of the contextual cues modulating the signaling output of activated K-RAS. We performed mass spectrometry on mouse tissues expressing wild-type or mutant Kras to determine how tissue context and genetic background modulate oncogenic signaling. Mutant Kras dramatically altered the proteomes and phosphoproteomes of preneoplastic and neoplastic colons and pancreases in a context-specific manner. We developed an approach to statistically humanize the mouse networks with data from human cancer and identified genes within the humanized CRC and PDAC networks synthetically lethal with mutant KRAS. Our studies demonstrate the context-dependent plasticity of oncogenic signaling, identify non-canonical mediators of KRAS oncogenicity within the KRAS-regulated signaling network, and demonstrate how statistical integration of mouse and human datasets can reveal cross-species therapeutic insights.

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