Cited by 52Neuroblastoma Research and TreatmentsMitochondrial Function and PathologyCell death mechanisms and regulation

N-Myc overexpression increases cisplatin resistance in neuroblastoma via deregulation of mitochondrial dynamics

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Casinelli, Gabriella, LaRosa, Jeff, Sharma, Manika, Cherok, Edward, Banerjee, Swati, Branca, Maria, Edmunds, Lia, Wang, Yudong +6 more·2016·Cell Death Discovery

Abstract

N-Myc is a global transcription factor that regulates the expression of genes involved in a number of essential cellular processes including: ribosome biogenesis, cell cycle and apoptosis. Upon deregulation, N-Myc can drive pathologic expression of many of these genes, which ultimately defines its oncogenic potential. Overexpression of N-Myc has been demonstrated to contribute to tumorigenesis, most notably for the pediatric tumor, neuroblastoma. Herein, we provide evidence that deregulated N-Myc alters the expression of proteins involved in mitochondrial dynamics. We found that N-Myc overexpression leads to increased fusion of the mitochondrial reticulum secondary to changes in protein expression due to aberrant transcriptional and post-translational regulation. We believe the structural changes in the mitochondrial network in response to N-Myc amplification in neuroblastoma contributes to two important aspects of tumor development and maintenance—bioenergetic alterations and apoptotic resistance. Specifically, we found that N-Myc overexpressing cells are resistant to programmed cell death in response to exposure to low doses of cisplatin, and demonstrated that this was dependent on increased mitochondrial fusion. We speculate that these changes in mitochondrial structure and function may contribute significantly to the aggressive clinical ph9enotype of N-Myc amplified neuroblastoma.

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Crossref · 10.1038/cddiscovery.2016.82

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  • Mitotic catastrophe is a major mechanism of action of anticancer chemotherapeutics, reflecting increased resistance of neoplastic cells to intrinsic apoptosis.

    “However, mitotic catastrophe appears to constitute a major mechanism of action of anticancer chemotherapeutics, mostly reflecting the increased resistance of neoplastic cells to the induction of intrinsic apoptosis [1004–1009].”

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Authors
Casinelli, G., LaRosa, J., Sharma, M., Cherok, E., Banerjee, S., Branca, M., Edmunds, L., Wang, Y., Sims-Lucas, S., Churley, L., Kelly, S., Sun, M., Stolz, D., & Graves, J. A.
Affiliations
University of Pittsburgh (US)
Corresponding author
Graves, J Anthony
Venue
Cell Death Discovery
Published
2016-12-12
Volume
2
Issue
1
Pages
16082-16082
ISSN
2058-7716 (ISSN-L)
OpenAlex
W2565058466
Cited by
52
References
77
Citations by year
2026: 2 · 2025: 4 · 2024: 11 · 2023: 4 · 2022: 6 · 2021: 9 · 2020: 3 · 2019: 3 · 2018: 3 · 2017: 7
FWCI
3.26
Type
journal article
Language
en
Open access
Locations
  • Cell Death Discovery (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • CureSearch for Children's Cancer
  • University of Pittsburgh
  • National Institute of Diabetes and Digestive and Kidney Diseases (K01DK096996)
  • Hyundai Hope On Wheels
Topics
  • Health Sciences › Medicine › Neurology › Neuroblastoma Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
MYCN, neuroblastoma, cisplatin resistance, mitochondrial dynamics, mitochondrial fusion, mitochondrial reticulum, apoptosis resistance, bioenergetics, transcriptional regulation, post-translational regulation, MYCN amplification

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