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Mass Spectrometry-Based Profiling of Histone Post-Translational Modifications in Uveal Melanoma Tissues, Human Melanocytes, and Uveal Melanoma Cell Lines - A Pilot Study

  • 0Department of Ophthalmology, University Hospital Bonn, Bonn, Germany.
Investigative Ophthalmology & Visual Science +

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February 13, 2024

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February 13, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Epigenetic alterations in uveal melanoma (UM) involve distinct histone post-translational modification (PTM) patterns. These patterns may aid in UM diagnosis and prognosis, with specific cell lines proving useful for further study.

Area Of Science

  • Oncology
  • Epigenetics
  • Ophthalmology

Background

  • Uveal melanoma (UM) pathogenesis is not fully understood, particularly regarding epigenetic alterations.
  • Histone post-translational modifications (PTMs) are key epigenetic regulators of gene expression and chromatin accessibility.
  • Characterizing epigenetic features in UM is crucial for understanding disease mechanisms and identifying prognostic markers.

Purpose Of The Study

  • To investigate the role of histone PTMs in the pathogenesis of UM.
  • To explore the potential prognostic relevance of epigenetic alterations in UM.
  • To comprehensively profile histone PTMs in UM tissues and cell lines.

Main Methods

  • Analysis of formalin-fixed paraffin-embedded (FFPE) UM tissues (n=24) and control samples (n=12).
  • Quantitative liquid chromatography-mass spectrometry (LC-MS) was used to profile histone PTMs.
  • Epigenetic profiling was also performed on UM cell lines (n=7) and melanocytes (n=8).

Main Results

  • Hierarchical clustering revealed significant differences in histone PTMs between UM and normal samples.
  • Specific histone modifications, including acetylations and H4K20me1, were altered in BAP1 and GNA11/GNAQ mutant UM.
  • UM cell lines MP65 and UPMM1 exhibited histone PTM patterns closely resembling primary UM tissues.

Conclusions

  • Distinct histone PTM patterns exist in UM, suggesting potential diagnostic and prognostic value.
  • Further validation in larger cohorts is necessary to confirm these epigenetic findings.
  • The study identified suitable UM cell line models for future epigenetic research.