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Myc proteins as therapeutic targets

W C Gustafson1, W A Weiss

  • 1Department of Pediatrics, University of California, San Francisco, CA 94158-9001, USA. GustafsonC@peds.ucsf.edu

Oncogene
|January 27, 2010
PubMed

Insights

Myc proteins are crucial in cancer progression. Targeting Mycn, amplified in aggressive neuroblastoma, offers new therapeutic strategies for this childhood cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pediatric Cancer Research

Background:

  • Myc proteins (c-myc, Mycn, Mycl) regulate cell proliferation and apoptosis, critical in cancer development.
  • MYCN gene amplification is a key marker for aggressive, treatment-resistant neuroblastoma in children.
  • Myc protein stability, influenced by phosphorylation and ubiquitination, presents therapeutic targets.

Purpose of the Study:

  • To review the function and regulation of Myc proteins in neuroblastoma.
  • To discuss emerging therapeutic strategies targeting Mycn in neuroblastoma.

Main Methods:

  • Literature review of Myc protein function, regulation, and therapeutic targeting in neuroblastoma.
  • Analysis of signaling pathways involved in Myc regulation, including RTK/PI3K/Akt/mTOR and Aurora A kinase.
  • Examination of Myc's role in apoptosis via the p53/Mdm2/Arf pathway and p53 mutations in relapsed neuroblastoma.

Main Results:

  • Myc proteins are central to neuroblastoma's aggressive nature and refractoriness to chemotherapy.
  • Phosphorylation and ubiquitin-mediated modulation of Myc proteins are key regulatory mechanisms.
  • Interactions with the p53 pathway, often mutated in relapsed neuroblastoma, contribute to therapeutic resistance.

Conclusions:

  • Understanding Myc protein regulation is vital for developing effective neuroblastoma treatments.
  • Targeting Mycn and its associated pathways holds promise for overcoming chemotherapy resistance in pediatric neuroblastoma.

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