Chromatin function in DNA repair

Our research team investigates how chromatin regulates the response to replication fork (RF) damage and how its disruption contributes to cancer. Many cancers, such as pediatric high-grade gliomas (pHGG), exhibit abnormal DNA repair, resistance to therapies, and mutations in chromatin-related genes, yet the underlying mechanisms remain poorly understood. Building on advanced tools to study RF damage and repair in mammalian cells, we focus on cancer-associated mutations in histone genes and novel chromatin factors involved in this process. Our goal is to uncover how these alterations affect genome integrity and promote tumor cell survival, ultimately advancing our understanding of chromatin’s role in cancer biology.

Our specific research questions

We aim to address fundamental questions:

  • how do chromatin-associated factors contribute to the DNA damage response?
  • how does their pathological dysfunction subvert the maintenance of genome integrity in human cancer cells?

 

Although significant knowledge has been gained over the past decades, we still lack a comprehensive understanding of how chromatin and its related factors trigger proteomic, metabolic, and post-translational modifications (PTMs) at sites of DNA damage detected during DNA synthesis, and how these modifications regulate DNA damage recognition, activation of repair pathways, and faithful duplication of the (epi)genome.

team's expertise

Genome editing of human cell lines

We use CRISPR-Cas9 to modify or knock out specific genes in human cells. It allows us to dissect the roles of individual chromatin-related genes in DNA damage response.

High-throughput imaging

We use microscopy to capture and analyze large numbers of cells rapidly. This method helps visualize and quantify cellular events at the chromatin level.

Proteomic approaches adapted for chromatin analysis

We employ specialized proteomic techniques to analyze protein composition and modifications from our preferred chromatin-realted proteins.

members

publications & news from team 4:

Aberrant DNA repair reveals a vulnerability in histone H3.3-mutant brain tumors

Beatrice Rondinelli co-authors a study revealing that pediatric high-grade gliomas (pHGG) with H3.3 mutations exhibit aberrant DNA repair promoting genome

Histone Variants: Guardians of Genome Integrity

B. Rondinelli co-authors this review covering the diveristy of Histone varints and their importance for Genome Integrity.

EZH2 promotes degradation of stalled replication forks by recruiting MUS81 through histone H3 trimethylation

B. Rondinelli co-authors this article of the D'Andrea lab describing the roles of EZH2 at stalled replication forks.