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Treatment of Ewing's sarcoma using an antisense oligodeoxynucleotide to regulate the cell cycle

Satoru Asami1, Motoaki Chin, Hiroyuki Shichino

  • 1Research Unit of Clinical Medicine, College of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi, Chiba 274-8555, Japan.

Biological & Pharmaceutical Bulletin
|March 4, 2008
PubMed

Insights

Ewing sarcoma (ES) is a rare bone cancer. Targeting the EWS-FLI1 gene with antisense oligodeoxynucleotides effectively reduced tumor growth by regulating cell cycle and apoptosis, offering a potential new treatment strategy for ES.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Ewing sarcoma (ES) is a highly malignant bone and soft tissue tumor affecting children and young adults.
  • ES is a small round cell tumor (SRCT) characterized by specific chimeric genes, such as EWS-FLI1, resulting from chromosomal translocations.
  • These chimeric genes influence critical cellular pathways, including cell cycle regulation and apoptosis.

Purpose of the Study:

  • To investigate the therapeutic potential of targeting EWS-FLI1 chimeric genes in Ewing sarcoma.
  • To explore the mechanism by which antisense oligodeoxynucleotides affect ES tumor growth.

Main Methods:

  • Utilized an antisense oligodeoxynucleotide designed to target the ATG initiation codon of the EWS-FLI1 chimeric gene.
  • Investigated the effect of the antisense oligodeoxynucleotide on Id2 gene expression and cell cycle regulation.
  • Assessed the impact of the treatment on ES tumor growth in a relevant model.

Main Results:

  • The antisense oligodeoxynucleotide specifically targeted EWS-FLI1 and EWS-ERG chimeric genes.
  • Treatment led to the down-regulation of Id2 gene expression, influencing cell cycle regulation.
  • Demonstrated significant regression of Ewing sarcoma tumor growth following treatment.

Conclusions:

  • The EWS-FLI1 chimeric gene is a critical driver of Ewing sarcoma.
  • Antisense oligodeoxynucleotide therapy targeting EWS-FLI1 shows promise for inducing tumor regression.
  • This therapeutic strategy represents a potential new avenue for treating Ewing sarcoma patients.

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