-Project 1: Astrocytes participate in a wide variety of complex and essential functions in the central nervous system (CNS), including synaptic development and plasticity, trophic regulation and blood-brain barrier formation. Work over the last decades has highlighted the existence of a far greater level of heterogeneity among astrocytes than previously considered. However, the contribution of this diversity to normal CNS function is still unclear. Recent work led us to evidence an unidentified sub-population of astrocytes (Olig2-AS) in mouse that can be distinguished from other astrocyte populations by the expression of Olig2. Our goal is to approach the question of the functional specificity of this Olig2-AS subpopulation. Experimental approaches we use in the lab include gene profiling, cellular/behavioural analysis in transgenic mouse models and in vitro models of astrocytes.
-Project 2: Recently, the interactions involving the glioma cells with the tumor microenvironment has been recognized essential to the tumor development, especially considering the specificity of the different brain populations. Interestingly, tumor cells can activate astrocytes to promote glioma invasion in healthy tissue. However, the interaction of glioma cells with different subpopulations of astrocytes and the consequences in activating them is still overlooked. By using transgenic mice, glioma mouse model, gene profiling, in utero electroporation and CRISPR engineering we propose to study the contribution of diverse types of astrocytes to cancer initiation and progression.
Alongside these research duties, I'm also secretary of the Club des Cellules Gliales françaises, a society whose aim is to federate French research on glial cells.