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Article Abstract
We report that mouse LSL-Kras;Trp53 (KP)-mediated lung adenocarcinoma (LADC) tumorigenesis can proceed through both PKCι-dependent and PKCι-independent pathways. The predominant pathway involves PKCι-dependent transformation of bronchoalveolar stem cells (BASCs). However, KP mice harboring conditional knock out Prkci alleles (KPI mice) develop LADC tumors through PKCι-independent transformation of Axin2 alveolar type 2 (AT2) stem cells. Transformed growth of KPI, but not KP, tumors is blocked by Wnt pathway inhibition in vitro and in vivo. Furthermore, a KPI-derived genomic signature predicts sensitivity of human LADC cells to Wnt inhibition, and identifies a distinct subset of primary LADC tumors exhibiting a KPI-like genotype. Thus, LADC can develop through both PKCι-dependent and PKCι-independent pathways, resulting in tumors exhibiting distinct oncogenic signaling and pharmacologic vulnerabilities.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6693680 | PMC |
| http://dx.doi.org/10.1016/j.ccell.2019.07.002 | DOI Listing |
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