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Kidger, Andrew M; Saville, Mark K; Rushworth, Linda K; Davidson, Jane; Stellzig, Julia; Ono, Motoharu; Kuebelsbeck, Ludwig A; Janssen, Klaus-Peter; Holzmann, Bernhard; Morton, Jennifer P; Sansom, Owen J; Caunt, Christopher J; Keyse, Stephen M
Oncogene, 05/2022, Letnik: 41, Številka: 20Journal Article
The cytoplasmic phosphatase DUSP6 and its nuclear counterpart DUSP5 are negative regulators of RAS/ERK signalling. Here we use deletion of either Dusp5 or Dusp6 to explore the roles of these phosphatases in a murine model of KRAS -driven pancreatic cancer. By 56-days, loss of either DUSP5 or DUSP6 causes a significant increase in KRAS -driven pancreatic hyperplasia. This is accompanied by increased pancreatic acinar to ductal metaplasia (ADM) and the development of pre-neoplastic pancreatic intraepithelial neoplasia (PanINs). In contrast, by 100-days, pancreatic hyperplasia is reversed with significant atrophy of pancreatic tissue and weight loss observed in animals lacking either DUSP5 or DUSP6. On further ageing, Dusp6 mice display accelerated development of metastatic pancreatic ductal adenocarcinoma (PDAC), while in Dusp5 animals, although PDAC development is increased this process is attenuated by atrophy of pancreatic acinar tissue and severe weight loss in some animals before cancer could progress. Our data suggest that despite a common target in the ERK MAP kinase, DUSP5 and DUSP6 play partially non-redundant roles in suppressing oncogenic KRAS signalling, thus retarding both tumour initiation and progression. Our data suggest that loss of either DUSP5 or DUSP6, as observed in certain human tumours, including the pancreas, could promote carcinogenesis.
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Vir: Osebne bibliografije
in: SICRIS
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