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LINE-1 Methylation Analysis in Mesenchymal Stem Cells Treated with Osteosarcoma-Derived Extracellular Vesicles

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Published on: February 1, 2020

DNA Methylation Profiling Identifies Distinct Clusters in Angiosarcomas.

Marije E Weidema¹, Ellen van de Geer², Christian Koelsche³

¹Department of Medical Oncology, Radboud University Medical Center, Nijmegen, the Netherlands. Marije.Weidema@radboudumc.nl.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research

|September 29, 2019

Summary

This summary is machine-generated.

DNA methylation profiling identified four distinct angiosarcoma subtypes. These subtypes correlate with clinical origin, chromosomal instability, and patient survival, offering new insights into this rare cancer.

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Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer

Published on: September 18, 2020

Area of Science:

Oncology
Genomics
Epigenetics

Background:

Angiosarcoma exhibits significant clinical heterogeneity, potentially linked to underlying biological differences.
DNA methylation profiling has revealed clinically relevant subgroups in various cancers, but not yet in angiosarcoma.

Purpose of the Study:

To investigate DNA methylation patterns in angiosarcoma to identify potential biological subgroups.
To correlate methylation-defined clusters with clinical presentation, origin, and patient survival.

Main Methods:

DNA methylation profiling using the Illumina Infinium MethylationEPIC array on 36 primary angiosarcoma samples.
Unsupervised hierarchical clustering to identify molecular subgroups.
Analysis of copy-number profiles for chromosomal stability and correlation with clinical data.

Main Results:

Four distinct angiosarcoma clusters were identified through DNA methylation profiling.
Clusters A1 and A2 were enriched for UV-induced and radiation-induced angiosarcoma, respectively.
Cluster B predominantly contained visceral and soft tissue angiosarcoma, associated with significantly lower overall survival and increased chromosomal instability compared to Cluster A.

Conclusions:

This study establishes, for the first time, distinct molecular subgroups within angiosarcoma based on DNA methylation.
These methylation-defined clusters correlate significantly with angiosarcoma clinical subtypes, overall survival, and chromosomal stability.
The findings provide a foundation for understanding angiosarcoma heterogeneity and developing targeted therapeutic strategies.