Role of The Epigenetic Enzyme Ezh2 in Leukemia

il y a 3 semaines

Marseille, France Centre de recherche en cancérologie de Marseille Temps plein

**Role of the epigenetic enzyme EZH2 in leukemia resistance**:

- Réf **ABG-124603**
- Stage master 2 / Ingénieur- Durée 6 mois- Salaire net mensuel sur grille salaire INSERM- 13/06/2024- Centre de recherche en cancérologie de Marseille- Lieu de travail- Marseille Provence-Alpes-Côte d'Azur France- Champs scientifiques- Biologie
- Mots clés- Leukemia, Epigenetics, Resistance**Établissement recruteur**:
**Site web**:
**Research focus of the team**

The main scientific objective of the team is to decipher the transcriptional and epigenetic networks involved in the regulation of proliferation _versus _differentiation of normal or pathological hematopoietic cells. We are interested in the epigenetic mechanisms related to age-related deregulation of hematopoiesis. In parallel, we develop a more applied research in collaboration with the clinicians of the Paoli-Calmettes Institute, using epigenomics and single-cell state-of-the-art techniques for acute myeloid leukemia (AML), in order to improve its management. Altogether, our scientific activity is mainly focused on the following keywords: AML, therapy resistance, hematopoietic stem cell, epigenetics, aging, single cell technologies.

**Description**:
**Master 2 project**:
Context. Resistance to anti-cancer therapeutics remains one of major obstacles to improving survival rates in cancer; it arises in a multitude of ways including accumulation of epigenetic alterations. Recently, we discovered a new mechanism of treatment resistance that is not fully driven by epigenetic remodeling but nevertheless implies an activity switch of an epigenetic enzyme, EZH2. Despite its well-established activity as part of PRC2 for mediating gene repression by H3K27me3 deposition, new evidence points the importance of others, so-called non-canonical activities. In line with this, we revealed that non-canonical EZH2 activity was associated with therapy resistance in acute myeloid leukemia (AML) (Poplineau et al., Blood 2022). However, our current knowledge of how and which non-canonical activity of EZH2 participates to this process is still poorly understood. One of our hypotheses is that EZH2 posttranslational modifications (PTMs) would affect EZH2 activity and impact treatment response. By coupling, proteomics, gene editing, epigenomics and transcriptomics approaches using AML cell line resistant to chemotherapy we aim to identify and functionally characterize EZH2 PTMs. We will monitor their repercussion at the chromatin and transcriptional levels and study their impact on therapy response. In parallel, we aim to evaluate, in preclinical models of AML, the therapeutic interest of targeting EZH2 non-canonical activity using an EZH2 PROTAC. We believe that EZH2 degradation will clear the therapy-resistant cells and/or lead to a transcriptomic reprogramming of these cells towards less aggressive cells. We hope to define AML conditions that will benefit the use of EZH2 degrader, opening new therapeutic opportunity for patients with high risk of relapse.

**Profil**:
**Prise de fonction**:

- 06/01/2025

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