The Multiple Facets of PRC2 Alterations in Cancers

Area of Science:

• Oncology
• Epigenetics
• Molecular Biology

Background:

• Mutations in chromatin regulators are frequent in cancer.
• The role of these mutations in tumor development is often unclear.
• The Polycomb machinery, particularly Polycomb repressive complex 2 (PRC2), is crucial for transcriptional silencing.

Purpose of the Study:

• Review current knowledge on Polycomb machinery alterations in cancer.
• Focus on Polycomb repressive complex 2 (PRC2) alterations and their impact.
• Explore how PRC2 alterations affect gene expression and tumor development.

Main Methods:

• Literature review of studies on Polycomb machinery and cancer.
• Analysis of PRC2 alterations across different tumor types.
• Discussion of the impact of PRC2 alterations on gene expression patterns.

Main Results:

• A variety of alterations can impair PRC2 activity.
• Specific tumor classes exhibit only one type of PRC2 alteration.
• PRC2 alterations influence distinct sets of genes based on tumor origin.

Conclusions:

• PRC2 alterations are constrained by tumor-specific gene regulation.
• PRC2 and chromatin regulators act as gatekeepers of transcriptional integrity.
• These regulators often possess a tumor-suppressive function.