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Updated: Oct 2, 2026

Zebrafish Model of Neuroblastoma Metastasis
05:20

Zebrafish Model of Neuroblastoma Metastasis

Published on: March 14, 2021

Minichromosome maintenance protein MCM7 is a direct target of the MYCN transcription factor in neuroblastoma

Jason M Shohet1, M John Hicks, Sharon E Plon

  • 1Department of Pediatrics, Baylor College of Medicine, Houston, Texas 77030, USA.

Cancer Research
|February 28, 2002
PubMed

Insights

The MYCN oncogene directly increases MCM7 expression in neuroblastoma, a key protein for DNA replication. This finding sheds light on how MYCN drives tumor growth in these cancers.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MYCN oncogene amplification is a major negative prognostic factor in neuroblastoma.
  • Direct transcriptional targets of MYCN in neuroblastoma remain largely undefined.
  • Understanding MYCN's regulatory network is crucial for developing targeted therapies.

Purpose of the Study:

  • To identify direct transcriptional targets of the MYCN oncogene in neuroblastoma.
  • To investigate the role of MCM7 in MYCN-amplified neuroblastoma.
  • To elucidate the mechanism by which MYCN influences DNA replication genes.

Main Methods:

  • Microarray analysis of RNA from neuroblastoma cell cultures.
  • Quantitative analysis of MCM7 RNA and protein expression.
  • Luciferase reporter assays to assess promoter activity.
  • Electrophoretic mobility shift assays (EMSA) to detect protein-DNA interactions.

Main Results:

  • MCM7 expression was 10-fold higher in MYCN-amplified neuroblastoma tumors compared to non-amplified tumors.
  • MCM7 RNA and protein levels were significantly increased in MYCN-amplified neuroblastoma cell lines and tumors.
  • MYCN induction in conditional cell lines led to increased MCM7 mRNA and protein levels.
  • Luciferase activity assays and EMSA confirmed direct transcriptional activation of MCM7 by MYCN.

Conclusions:

  • The MYCN oncogene directly activates MCM7, an essential gene for DNA replication, in neuroblastoma.
  • This direct activation of DNA replication genes by MYCN may contribute to neoplastic transformation and tumor progression.
  • Targeting the MYCN-MCM7 axis could represent a novel therapeutic strategy for MYCN-amplified neuroblastoma.

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