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Updated: Jan 22, 2026
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The In ovo CAM-assay as a Xenograft Model for Sarcoma
Published on: July 17, 2013
26.2K
Genomic and transcriptomic comparison of post-radiation versus sporadic sarcomas
Tom Lesluyes1,2,3,4, Jessica Baud1,2, Gaëlle Pérot1,5
1Inserm U1218, Institut Bergonié, Bordeaux, France.
Summary
Post-radiation sarcomas share genomic complexity with sporadic types, but show distinct CDKN2A/B losses. Immune response may influence aggressive angiosarcoma behavior.
Area of Science:
- Oncology
- Genomics
- Cancer Research
Background:
- Post-radiation sarcomas are rare secondary cancers with poorly understood oncogenesis.
- Genetic specificities of these complex malignancies are largely undescribed.
Purpose of the Study:
- To investigate genomic and transcriptomic profiles of post-radiation sarcomas.
- To compare these profiles with sporadic sarcomas to identify unique characteristics and understand oncogenesis.
Main Methods:
- Genomic and transcriptomic analyses (DNA-array, RNA sequencing) on 77 post-radiation sarcomas.
- Comparison with a reference cohort of 93 sporadic sarcomas.
- Analysis of copy number variations, transcriptome, fusion genes, and mutational landscapes.
Main Results:
- Similar chromosomal complexity observed in both post-radiation and sporadic sarcomas.
- More frequent CDKN2A and CDKN2B losses in post-radiation sarcomas (71%) versus sporadic (39%).
- Recurrent MYC amplifications and KDR variants found in post-radiation angiosarcomas; two transcriptomic groups identified with different clinical courses.
- Lower inflammation and immune infiltrate correlated with higher aggressiveness in angiosarcomas.
Conclusions:
- Post-radiation and sporadic sarcomas with complex genetics exhibit similar genomic and transcriptomic patterns.
- CDKN2A/B loss is a distinguishing feature of post-radiation sarcomas.
- Immune response modulation is a potential factor in angiosarcoma aggressiveness.
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