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Single-Cell RNA Sequencing Reveals the Cellular and Molecular Differences Between Myxofibrosarcoma and
Timur I Fetisov1,2, Alexander V Ikonnikov1, Elena E Kopantseva1
1Institute of Medicine, RUDN University, 117198 Moscow, Russia.
Medical Sciences (Basel, Switzerland)
|February 20, 2026
Summary
This study reveals distinct cellular and molecular differences between myxofibrosarcoma (MXF) and undifferentiated pleomorphic sarcoma (UPS). These findings in sarcoma subtypes may guide new therapeutic strategies.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Myxofibrosarcoma (MXF) and undifferentiated pleomorphic sarcoma (UPS) are aggressive cancers with challenging differential diagnoses.
- Understanding their cellular and transcriptomic differences is crucial for improved identification and treatment.
Purpose of the Study:
- To elucidate cellular and transcriptomic discrepancies between MXF and UPS.
- To identify potential biomarkers for distinguishing these sarcoma subtypes.
Main Methods:
- Single-cell RNA sequencing was employed to compare MXF and UPS tumor samples.
- Analysis included tumor cell clusters, cell-cell ligand-receptor interactions, and lymphoid cell populations.
Main Results:
- No significant differences in major cell type proportions were found between MXF and UPS.
- Cytotoxic CD8+ T cell proportion was higher in MXF.
- UPS cancer cells showed active extracellular matrix pathways, while MXF cells exhibited high activity in growth factor and angiogenesis pathways.
- Distinct ligand-receptor interactions were observed, with differences in CD80, CTLA-4, CD28, CD44, integrins, and extracellular matrix proteins between the subtypes.
Conclusions:
- Significant differences exist between UPS and MXF in lymphoid cell composition and intercellular interactions.
- These findings enhance the understanding of biological distinctions between these sarcoma subtypes.
- The identified differences may inform the development of novel therapeutic approaches for MXF and UPS.
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