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The clear cell sarcoma functional genomic landscape.

Emanuele Panza1,2, Benjamin B Ozenberger3, Krystal M Straessler1,3

  • 1Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, USA.

The Journal of Clinical Investigation
|June 22, 2021
PubMed
Summary
This summary is machine-generated.

Clear cell sarcoma (CCS) genomic landscape is now understood, revealing key alterations like MITF amplifications. These findings in human and mouse models pave the way for targeted therapies and improved survival for young patients.

Keywords:
CancerGeneticsMouse modelsOncogenesOncology

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Area of Science:

  • Oncology
  • Genomics
  • Cancer Biology

Background:

  • Clear cell sarcoma (CCS) is an aggressive cancer in adolescents and young adults.
  • CCS is driven by EWSR1-ATF1 or EWSR1-CREB1 fusion proteins but remains genomically uncharacterized.
  • Understanding CCS genomic alterations is critical for developing effective treatments.

Purpose of the Study:

  • To characterize the genome of clear cell sarcoma (CCS).
  • To identify key genetic alterations driving CCS development.
  • To establish innovative mouse models for studying CCS biology and preclinical therapy validation.

Main Methods:

  • Copy number analysis of human CCS tumors.
  • Exome sequencing of mouse models expressing EWSR1-ATF1.
  • Cre-loxP-induced chromosomal translocation in mice to model CCS.

Main Results:

  • Frequent amplifications of the MITF locus and chromosomes 7 and 8 observed in human CCS.
  • Mouse models revealed chromosome 6 loss and chromosome 15 instability, including amplification near MYC.
  • Mitf and Myc were identified as potential contributors to sarcomagenesis.

Conclusions:

  • This study provides the first functional landscape of the CCS genome.
  • Identified genomic alterations and developed novel mouse models advance CCS research.
  • Findings support further investigation into targeted therapies for improved patient outcomes.