Stromal immunoregulation of inflammation and repair

Responsable de l’encadrement : Lucie PEDUTO

Tél : 01 44 38 94 27     E-mail:

Institut Pasteur

Résumé du Projet de Stage

Barrier surfaces such as the skin are exposed constantly to the external environment, exposing them to infections and injuries. Barrier tissues are therefore equipped with various populations to ensure protection from pathogens, promote repair upon injury and maintain tissue homeostasis. These functions are ensured by a complex crosstalk between epithelial cells, tissue stem cells, immune cells, and several populations of stromal cells including myofibroblasts, mesenchymal cells, fibroblasts and pericytes.

Stromal cells are essential for the proper functioning of blood vessels, to build a niche for tissue stem cells and to ensure immune homeostasis. Overactivation of stromal cells is implicated in a number of pathologies including chronic inflammatory diseases, autoimmune diseases, allergic diseases and poor tissue regeneration, yet how stromal cells get dysregulated is still poorly understood. Here, we want to understand how stromal cells sense their environment to maintain tissue homeostasis and ensure efficient responses to injury. To go beyond the state-of-the-art, we will perform phenotypic and transcriptomic based screens to identify stromal subsets and genes that regulate innate immunity and repair responses in conditions of activation and injury, building on existing data obtained in the lab. By using imaging, genetic lineage tracing, cellular approaches and unique mouse models our lab has generated, we will investigate how stromal cells regulate skin inflammation, in acute and chronic settings. The student will be part of a team routinely using molecular biology, flow cytometry, imaging, genetic models and transcriptomic approaches to investigate the role of stromal cells in tissue homeostasis, immunity and cancer.


 Dernières Publications en lien avec le projet :

– Jacob JM, Di Carlo SE, Stzepourginski I, Lepelletier A, Ndiaye PD, Varet H, …, Nigro G, Peduto L. 2022. PDGFRα-induced stromal maturation is required to restrain postnatal intestinal epithelial stemness and promote defense mechanisms. Cell Stem Cell, 29(5): 856-868.
– Benabid A, Peduto L. 2020. Mesenchymal perivascular cells in immunity and disease. Curr Opin Immunol 64 :50-55.
– Di Carlo S, Peduto L. 2018. The perivascular origin of pathological fibroblasts. JCI review series on Fibrosis. J Clin Invest, 128(1):54-63.
– Stzepourginski I, Nigro G, Jacob JM, Dulauroy S, Sansonetti PJ, Eberl G, Peduto L. 2017. CD34+ mesenchymal cells are a major component of the intestinal stem cells niche at homeostasis and after injury. PNAS, 114(4): E506-E513.
– Dulauroy S, Di Carlo SE, Vives FL, Eberl G, and Peduto L. 2012. Lineage tracing and genetic ablation of ADAM12(+) perivascular cells identify a major source of profibrotic cells during acute tissue injury. Nature Medicine, 18(8): 1262-1270.


Ce projet s’inscrit dans la perspective d’une thèse

 Ecole Doctorale de rattachement :  ED562 BIOSPC


Equipe d’Accueil : Stroma, inflammation & Tissue Repair

Intitulé de l’Unité : Stroma, inflammation & Tissue Repair

Nom du Responsable de l’Unité : Lucie PEDUTO

Nom du Responsable de l’Équipe :  Lucie PEDUTO

Adresse :  INSTITUT PASTEUR, 25 rue du Docteur Roux, 75015 Paris

Adresse :  27 rue du Faubourg Saint Jacques, 75014 Paris