Inhibition of polyamine synthesis and uptake reduces tumor progression and prolongs survival in mouse models of neuroblastoma
| Autor: | Amanda J. Russell, Giovanni Perini, Stefania Purgato, André Oberthuer, Bing Liu, Federico M. Giorgi, Georgina L. Eden, Denise M. T. Yu, Sara Sarraf, Murray D. Norris, Michelle Haber, Emanuele Valli, Giorgio Milazzo, Claudia Flemming, Belamy B. Cheung, Simone Di Giacomo, Laura D. Gamble, Jamie I. Fletcher, David S. Ziegler, Toby Trahair, Sophie Allan, Glenn M. Marshall, Lin Xiao, Wendy B. London, Matthias Fischer, Michael D. Hogarty, Andrew J. Gifford, Jayne Murray, Daniel R. Carter, Alvin Kamili, Kimberley M. Hanssen, Chelsea Mayoh, Mark R. Burns |
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| Přispěvatelé: | Laura D. Gamble, Stefania Purgato, Jayne Murray, Lin Xiao, Denise M. T. Yu, Kimberley M. Hanssen, Federico M. Giorgi, Daniel R. Carter, Andrew J. Gifford, Emanuele Valli, Giorgio Milazzo, Alvin Kamili, Chelsea Mayoh, Bing Liu, Georgina Eden, Sara Sarraf, Sophie Allan, Simone Di Giacomo, Claudia L. Flemming, Amanda J. Russell, Belamy B. Cheung, Andre Oberthuer, Wendy B. London, Matthias Fischer, Toby N. Trahair, Jamie I. Fletcher, Glenn M. Marshall, David S. Ziegler, Michael D. Hogarty, Mark R. Burns, Giovanni Perini, Murray D. Norris, and Michelle Haber |
| Rok vydání: | 2019 |
| Předmět: |
MYCN Neuroblastoma Polyamine ODC1 Cancer Pediatric Therapy Oncology Tumor Microenvironment
Ornithine decarboxylase Cohort Studies chemistry.chemical_compound Mice Neuroblastoma Cell Line Tumor medicine Polyamines Animals neoplasms Proportional Hazards Models Gene knockdown N-Myc Proto-Oncogene Protein Chemistry Gene Amplification Membrane Transport Proteins General Medicine medicine.disease Prognosis Survival Analysis Biosynthetic Pathways Spermidine Gene Expression Regulation Neoplastic Disease Models Animal Treatment Outcome Gene Expression Regulation Tumor progression Cancer cell Multivariate Analysis Cancer research Disease Progression Childhood Neuroblastoma Polyamine |
| Popis: | Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Amplification of the MYCN oncogene is associated with an aggressive phenotype and poor outcome in childhood neuroblastoma. Polyamines are highly regulated essential cations that are frequently elevated in cancer cells, and the rate-limiting enzyme in polyamine synthesis, ornithine decarboxylase 1 (ODC1), is a direct transcriptional target of MYCN. Treatment of neuroblastoma cells with the ODC1 inhibitor difluoromethylornithine (DFMO), although a promising therapeutic strategy, is only partially effective at impeding neuroblastoma cell growth due to activation of compensatory mechanisms resulting in increased polyamine uptake from the surrounding microenvironment. In this study, we identified solute carrier family 3 member 2 (SLC3A2) as the key transporter involved in polyamine uptake in neuroblastoma. Knockdown of SLC3A2 in neuroblastoma cells reduced the uptake of the radiolabeled polyamine spermidine, and DFMO treatment increased SLC3A2 protein. In addition, MYCN directly increased polyamine synthesis and promoted neuroblastoma cell proliferation by regulating SLC3A2 and other regulatory components of the polyamine pathway. Inhibiting polyamine uptake with the small-molecule drug AMXT 1501, in combination with DFMO, prevented or delayed tumor development in neuroblastoma-prone mice and extended survival in rodent models of established tumors. Our findings suggest that combining AMXT 1501 and DFMO with standard chemotherapy might be an effective strategy for treating neuroblastoma. |
| Databáze: | OpenAIRE |
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