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Updated: Jan 19, 2026

Cooperative Binding of Transcription Regulators
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Cooperation of cancer drivers with regulatory germline variants shapes clinical outcomes

Julian Musa1, Florencia Cidre-Aranaz1, Marie-Ming Aynaud2

  • 1Max-Eder Research Group for Pediatric Sarcoma Biology, Institute of Pathology, Faculty of Medicine, LMU Munich, Munich, Germany.

Nature Communications
|September 13, 2019
PubMed

Insights

In Ewing sarcoma (EwS), inherited genetic variations and oncogenes cooperate to influence tumor growth and drug response. High MYBL2 expression indicates sensitivity to CDK2 inhibitors, suggesting a new therapeutic strategy.

Area of Science:

  • Oncology
  • Genetics
  • Molecular Biology

Background:

  • Ewing sarcoma (EwS) shows limited somatic alterations, yet clinical outcomes vary significantly.
  • The role of germline variants in pediatric malignancies like EwS is not fully understood.

Purpose of the Study:

  • To investigate how oncogenes and germline variants cooperate to drive EwS progression and affect treatment response.
  • To identify potential biomarkers for targeted therapies in EwS.

Main Methods:

  • Whole-genome and RNA sequencing were employed to analyze tumor samples.
  • The study focused on the interaction between EWSR1-FLI1, a polymorphic enhancer, and MYBL2 expression.

Main Results:

  • A polymorphic enhancer element, regulated by EWSR1-FLI1, controls MYBL2 expression.
  • Germline variations at this locus correlate with MYBL2 expression levels.
  • Elevated MYBL2 sensitizes EwS cells to CDK2 inhibition, both in vitro and in vivo.

Conclusions:

  • Cooperation between somatic mutations and germline variants significantly impacts EwS tumor progression.
  • MYBL2 serves as a potential biomarker for anti-CDK2 therapy in EwS.
  • Integrating the regulatory genome is crucial for advancing precision medicine in pediatric cancers.

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