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• W2013133976 abstract "Here we show that the fate of osteolytic bone metastasis depends on the balance among autophagy, anoikis resistance and ossification, and that the hepatocyte growth factor (HGF) signaling pathway seems to have an important role in orchestrating bone colonization. These findings are consistent with the pathophysiology of bone metastasis that is influenced by the cross-talk of supportive and neoplastic cells through molecular signaling networks. We adopted the strategy to target metastasis and stroma with the use of adenovirally expressed NK4 (AdNK4) and Dasatinib to block HGF/Met axis and Src activity. In human bone metastatic 1833 cells, HGF conferred anoikis resistance via Akt and Src activities and HIF-1α induction, leading to Bim isoforms degradation. When Src and Met activities were inhibited with Dasatinib, the Bim isoforms accumulated conferring anoikis sensitivity. The proviability effect of HGF, under low-nutrient stress condition, was related to a faster autophagy deactivation with respect to HGF plus Dasatinib. In the 1833 xenograft model, AdNK4 switched metastasis vasculature to blood lacunae, increasing HIF-1α in metastasis. The combination of AdNK4 plus Dasatinib gave the most relevant results for mice survival, and the following molecular and cellular changes were found to be responsible. In bone metastasis, we observed a hypoxic condition - marked by HIF-1α - and an autophagy failure - marked by p62 without Beclin-1. Then, osteolytic bone metastases were largely prevented, because of autophagy failure in metastasis and ossification in bone marrow, with osteocalcin deposition. The abnormal repair process was triggered by the dysfunctional autophagy/anoikis interplay. In conclusion, the concomitant blockade of HGF/Met axis and Src activity seemed to induce HIF-1α in metastasis, whereas the bone marrow hypoxic response was reduced. As a consequence, anoikis resistance might be hampered favoring, instead, autophagy failure and neoformation of woven bone trabeculae. Mice survival was, therefore, prolonged by overcoming an escape strategy adopted by metastatic cells by disruption of tumor-stroma coevolution, showing the importance of autophagy inhibition for the therapy of bone metastasis." @default.
• W2013133976 created "2016-06-24" @default.
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• W2013133976 date "2014-01-16" @default.
• W2013133976 modified "2023-10-08" @default.
• W2013133976 title "RETRACTED ARTICLE: Osteolytic bone metastasis is hampered by impinging on the interplay among autophagy, anoikis and ossification" @default.
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• W2013133976 doi "https://doi.org/10.1038/cddis.2013.465" @default.
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