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Learn MoreCancer is a heterocellular disease composed of tumor cells and stromal cells. Although stromal cells are known to regulate cancer progression, oncogene-dependent signalling through heterocellular cancer systems remains poorly elucidated. Here, we describe KRASG12D-dependent reciprocal signalling across tumor and stromal Pancreatic Ductal Adenocarcinoma (PDA) cells. Heterocellular multivariate phosphoproteomics demonstrates how an oncogenic cue (KRASG12D), a trans-cellular signal (SHH), and stromal cells drive a reciprocal response in tumor cells. KRASG12D-dependent reciprocal signalling regulates the tumor cell phosphoproteome, total proteome, and mitochondria activity via an IGFR1/AXL-AKT axis. The reciprocal KRASG12D signalling state requires a heterocellular context and is unreachable by cell-autonomous oncogenic KRAS alone. These findings provide evidence that oncogenic KRAS regulates tumor cells via heterocellular reciprocation. SOURCE: Hui Sun Leong (HuiSun.Leong@cruk.manchester.ac.uk) - Computational Biology Support Team Cancer Research UK Manchester Institute
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