RASA3 regulates the balance of pTh17-Th2 reciprocal programs.
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ABSTRACT:
PROVIDER: PRJNA437147 | ENA |
REPOSITORIES: ENA
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Project description:Cancer 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.
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Project description:Deletion of the gene encoding Foxa2, a winged helix transcription factor selectively expressed in respiratory epithelial cells, caused spontaneous pulmonary eosinophilic inflammation and goblet cell metaplasia. Loss of Foxa2 induced the recruitment and activation of myeloid dendritic cells (mDCs) and Th2 cells in the lung, and was associated with the increased production of T helper 2 (Th2) cytokines and chemokines. mRNA microarray analysis demonstrated that deletion of Foxa2 induced the expression of a number of mRNAs regulating pulmonary dendritic cell activation, Th2 mediated inflammation, and goblet cell differentiation. The spontaneous pulmonary inflammation and goblet cell metaplasia caused by loss of Foxa2 was inhibited by treatment of newborn Foxa2∆/∆ mice with monoclonal IL-4Ralpha antibody. Expression of Foxa2 in non-ciliated secretory cells (Clara cells) in vivo inhibited goblet cell differentiation induced by pulmonary allergen exposure. The respiratory epithelium plays a central role in the regulation of Th2-mediated inflammation and innate immunity in the developing lung in a process regulated by Foxa2.
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