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Nazio, Francesca; Po, Agnese; Abballe, Luana; Ballabio, Claudio; Diomedi Camassei, Francesca; Bordi, Matteo; Camera, Antonio; Caruso, Simona; Caruana, Ignazio; Pezzullo, Marco; Ferraina, Caterina; Milletti, Giacomo; Gianesello, Matteo; Reddel, Sofia; De Luca, Carmen Dolores; Ceglie, Donatella; Marinelli, Sara; Campello, Silvia; Papaleo, Elena; Miele, Evelina; Cacchione, Antonella; Carai, Andrea; Vinci, Maria; Velardi, Enrico; De Angelis, Biagio; Tiberi, Luca; Quintarelli, Concetta; Mastronuzzi, Angela; Ferretti, Elisabetta; Locatelli, Franco; Cecconi, Francesco
Acta neuropathologica, 09/2021, Letnik: 142, Številka: 3Journal Article
Medulloblastoma (MB) is a childhood malignant brain tumour comprising four main subgroups characterized by different genetic alterations and rate of mortality. Among MB subgroups, patients with enhanced levels of the c-MYC oncogene (MB Group3 ) have the poorest prognosis. Here we identify a previously unrecognized role of the pro-autophagy factor AMBRA1 in regulating MB. We demonstrate that AMBRA1 expression depends on c-MYC levels and correlates with Group 3 patient poor prognosis; also, knockdown of AMBRA1 reduces MB stem potential, growth and migration of MB Group3 stem cells. At a molecular level, AMBRA1 mediates these effects by suppressing SOCS3, an inhibitor of STAT3 activation. Importantly, pharmacological inhibition of autophagy profoundly affects both stem and invasion potential of MB Group3 stem cells , and a combined anti-autophagy and anti-STAT3 approach impacts the MB Group3 outcome. Taken together, our data support the c-MYC/AMBRA1/STAT3 axis as a strong oncogenic signalling pathway with significance for both patient stratification strategies and targeted treatments of MB Group3 .
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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