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Article

DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma

  • Authors:
    • Dana-Lynn T. Koomoa
    • Dirk Geerts
    • Ingo Lange
    • Jan Koster
    • Anthony E. Pegg
    • David J. Feith
    • André S. Bachmann
  • View Affiliations / Copyright

    Affiliations: Department of Pharmaceutical Sciences, College of Pharmacy, University of Hawaii at Hilo, Hilo, HI 96720, USA, Department of Pediatric Oncology/Hematology, Sophia Children's Hospital, Erasmus University Medical Center, 3015 GE Rotterdam, The Netherlands, Department of Human Genetics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands, Department of Cellular and Molecular Physiology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
  • Pages: 1219-1228
    |
    Published online on: February 21, 2013
       https://doi.org/10.3892/ijo.2013.1835
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Abstract

Neuroblastoma (NB) is the most common extracranial pediatric tumor. NB patients over 18 months of age at the time of diagnosis are often in the later stages of the disease, present with widespread dissemination, and often possess MYCN tumor gene amplification. MYCN is a transcription factor that regulates the expression of a number of genes including ornithine decarboxylase (ODC), a rate-limiting enzyme in the biosynthesis of polyamines. Inhibiting ODC in NB cells produces many deleterious effects including G1 cell cycle arrest, inhibition of cell proliferation, and decreased tumor growth, making ODC a promising target for drug interference. DFMO treatment leads to the accumulation of the cyclin-dependent kinase inhibitor p27Kip1 protein and causes p27Kip1/Rb-coupled G1 cell cycle arrest in MYCN-amplified NB tumor cells through a process that involves p27Kip1 phosphorylation at residues Ser10 and Thr198. While p27Kip1 is well known for its role as a cyclin-dependent kinase inhibitor, recent studies have revealed a novel function of p27Kip1 as a regulator of cell migration and invasion. In the present study we found that p27Kip1 regulates the migration and invasion in NB and that these events are dependent on the state of phosphorylation of p27Kip1. DFMO treatments induced MYCN protein downregulation and phosphorylation of Akt/PKB (Ser473) and GSK3-β (Ser9), and polyamine supplementation alleviated the DFMO-induced effects. Importantly, we provide strong evidence that p27Kip1 mRNA correlates with clinical features and the survival probability of NB patients.
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Copy and paste a formatted citation
Spandidos Publications style
Koomoa DT, Geerts D, Lange I, Koster J, Pegg AE, Feith DJ and Bachmann AS: DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma. Int J Oncol 42: 1219-1228, 2013.
APA
Koomoa, D.T., Geerts, D., Lange, I., Koster, J., Pegg, A.E., Feith, D.J., & Bachmann, A.S. (2013). DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma. International Journal of Oncology, 42, 1219-1228. https://doi.org/10.3892/ijo.2013.1835
MLA
Koomoa, D. T., Geerts, D., Lange, I., Koster, J., Pegg, A. E., Feith, D. J., Bachmann, A. S."DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma". International Journal of Oncology 42.4 (2013): 1219-1228.
Chicago
Koomoa, D. T., Geerts, D., Lange, I., Koster, J., Pegg, A. E., Feith, D. J., Bachmann, A. S."DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma". International Journal of Oncology 42, no. 4 (2013): 1219-1228. https://doi.org/10.3892/ijo.2013.1835
Copy and paste a formatted citation
x
Spandidos Publications style
Koomoa DT, Geerts D, Lange I, Koster J, Pegg AE, Feith DJ and Bachmann AS: DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma. Int J Oncol 42: 1219-1228, 2013.
APA
Koomoa, D.T., Geerts, D., Lange, I., Koster, J., Pegg, A.E., Feith, D.J., & Bachmann, A.S. (2013). DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma. International Journal of Oncology, 42, 1219-1228. https://doi.org/10.3892/ijo.2013.1835
MLA
Koomoa, D. T., Geerts, D., Lange, I., Koster, J., Pegg, A. E., Feith, D. J., Bachmann, A. S."DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma". International Journal of Oncology 42.4 (2013): 1219-1228.
Chicago
Koomoa, D. T., Geerts, D., Lange, I., Koster, J., Pegg, A. E., Feith, D. J., Bachmann, A. S."DFMO/eflornithine inhibits migration and invasion downstream of MYCN and involves p27Kip1 activity in neuroblastoma". International Journal of Oncology 42, no. 4 (2013): 1219-1228. https://doi.org/10.3892/ijo.2013.1835
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