Identification and targeting of extrinsic regulators of myeloid malignancies

...

Lina Benajiba

Team leader

Stéphanie CHAMBAUD

Research themes

Research themes

Although oncogenic driver mutations are found in healthy tissues, they do not often result in overt cancer.

This genotype – phenotype discrepancy warrens the search for extrinsic mechanisms of cancer development and maintenance, such as exposition to specific environments. Using myeloid neoplasms as a cancer model, our multidisciplinary team aims at dissecting the hematopoietic-niche partnership to identify innovative therapeutic strategies to prevent acute myeloid leukemia development, maintenance and recurrence.

  • Myeloproliferative neoplasms
  • Acute myeloid leukemia (AML)

Research areas

Leukemic transformation is a complex process that could result from the life-long therapeutic intervention needed to treat MPN chronic phase, and/or from microenvironment-related signals.

To decipher the mechanism of pre-leukemic to leukemic state transition, the team develops a comprehensive translational approach combining data mining of an extensively annotated database, in vitro and in vivo models and large-scale functional and descriptive genomic approaches.

We aim at highlighting potential therapy related selection of highly detrimental mutations and deciphering its underlying mechanisms. We are also interested in the effects of MPN treatments on non-hematopoietic organs, particularly the skin. In parallel, we aim at discovering and validating novel niche-hematopoietic crosstalk transformation promoting pathways.

Our discoveries should contribute to better understanding environmentally induced MPN clonal evolution, offering a path towards therapeutically preventing leukemic transformation.

The bone marrow niche plays a key role in sustaining AML and regulating drug resistance.

Our goal is to define novel niche-leukemic crosstalk induced dependencies, through combining single-cell omic approaches to high-throughput screening tools applied to custom-made in vitro and in vivo models.

Our team develops humanized mouse models, closely mimicking the physio-pathological conditions of leukemic cells growth within the bone marrow microenvironment.

In collaboration with Saint-Louis hospital clinical departments, we develop a pipeline to identify innovative therapeutic targets and conduct the necessary preclinical steps towards translating our findings to the clinic, including identification of response biomarkers and synergy studies.

In parallel, we are highly interested in shedding light on the mechanistic underpinnings of the bone marrow-leukemia crosstalk.

Our findings should open the road for concomitant “seed” and “soil” targeting strategies, resulting in AML leukemic stem cells eradication and patient’s survival improvement.

Patients with AML are at higher risk of early death due to severe infectious complications (sepsis), tissue infiltration by blast cells, leukostasis or tumor lysis syndrome.

Our team investigates the pathophysiological mechanisms underlying these life-threatening complications and their subsequent acute organ failure.

Using in vitro and in vivo models, we focus on endothelial dysfunction’s key role.

In parallel, we are highly interested in how essential cellular and molecular signals triggered by sepsis-induced inflammation alter the bone marrow microenvironment and influence leukemic cells proliferation and AML progression.

Our work aims to uncover novel therapeutic strategies to improve patient survival by mitigating acute AML-associated complications and their potential long-term impact on disease evolution.

Team members

Lina BENAJIBA
MD,PhD, HDR – Associate Professor (MCU-PH) – Team Leader
Lara Zafrani
MD, PhD, HDR – Full professor (PU-PH) – Principal Investigator
Hélène Pasquer
MD, PhD – Assistant Professor (CCA-INSERM-Bettencourt)
Stéphanie PONS
MD, PhD – PHC – Principal Investigator
Emmanuel Raffoux
MD –Associated Professor – Associated Clinician
Florence Rabian
MD – PH – Associated Clinician
Cécile Culeux
Lab manager
Léa Provent
Research Assistant
Morgane Denis
PhD, Postdoctoral fellow
Alexandre Fagnan
PhD, Postdoctoral fellow
Aurélie Claquin
PhD Student
Federica Namor
PhD Student
Nabila Saker
PhD Student

Scientific publications

Targeting acute myeloid leukemia dependency on VCP-mediated DNA repair through a selective second-generation small-molecule inhibitor

Targeting acute myeloid leukemia dependency on VCP-mediated DNA repair through a selective second-generation small-molecule inhibitor

Blandine Roux & al, Sci Transl Med, 2021
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AML patient blasts exhibit polarization defects upon interaction with bone marrow stromal cells

AML patient blasts exhibit polarization defects upon interaction with bone marrow stromal cells.

Khansa Saadallah & al, EMBO reports, 2025
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JAK2 inhibition mediates clonal selection of RAS pathway mutations in myeloproliferative neoplasms

JAK2 inhibition mediates clonal selection of RAS pathway mutations in myeloproliferative neoplasms

Nabih Maslah & al, Nature Communications, 2025
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Join us

Please get in touch if you are interested in joining the team at all levels.

Our lab is always eager to welcome passionate young scientists.

You can contact us at the following address: lina.benajiba@inserm.fr

 

 

 

Funding

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