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RNAseq carcinogen induced signatures in lung adenocarcinoma cell lines

ABSTRACT: RNAseq carcinogen induced signatures in lung adenocarcinoma cell lines

PROVIDER: PRJNA521051 | ENA |

REPOSITORIES: ENA

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RNAseq carcinogen induced signatures in lung adenocarcinoma cell lines

Project description:FVB, Balb/c, and C57BL/6 mice received the tobacco carcinogens urethane (Sigma Aldrich, U2500) intraperitoneally (1g/Kg in 100 μl phosphate-buffered saline) or diethylnitrosamine (200 mg/kg) (Sigma Aldrich, N0756). Carcinogen induced lung adenocarcinoma murine cell lines generation| Ten months post first carcinogen (urethane, DEN) exposure mice were sacrificed, lung tumours were dissected from surrounding healthy lung parenchyma under sterile conditions, were halved, one half was processed for histology and the other half was chopped into 1 mm pieces and seeded to cell culture dishes. Cells were cultured under standard conditions outlined below. When adenocarcinoma was diagnosed for a given tumour, its corresponding culture was passaged in vitro over a period of 18 months and 60 passages, whichever occurred first. After gene expression and mutational signature extraction, the signature were compared with human lung adenocarcinoma RNAseq results.

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Control of alveolar macrophage differentiation by Siah1a/2 ubiquitin ligases limits carcinogen-induced lung adenocarcinoma [scRNA-seq]

Project description:Tumor microenvironment components, including T and myeloid cells, play important roles in lung adenocarcinoma (LADC) progression and response to therapy. Here, we identify a role for Siah1a/2 ubiquitin ligases in controlling alveolar macrophage (AM) differentiation and urethane-induced LADC. Genetic ablation of Siah1a/2 in AMs enriched their immature state, coinciding with increased pro-tumorigenic and inflammatory gene signatures and abundance of Siah1a/2 substrates NRF2 and B-catenin. Urethane administration to mice enriched the population of monocytic and immature-like AMs, which were more prevalent in the lungs of mice carrying Siah1a/2-ablated macrophages. While resembling transitional profibrotic macrophages often seen in lung fibrosis, enrichment of immature AMs coincided with the development of more frequent and larger lung tumors in urethane-treated mice harboring Siah1a/2 ablated macrophages compared with controls. Gene expression signature of Siah1a/2 ablated immature-like AMs is associated with increased infiltration of CD14+ immune cells and worse survival of LADC patients. Our findings identify Siah1a/2 as gatekeepers of cancer development by controlling AM differentiation and profibrotic phenotypes contributing to carcinogen-induced lung cancer.

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