The world
of the infinitely small


Chronic respiratory diseases are a major cause of mortality and morbidity. The respiratory tree is located at the interface between environment and host, and as such plays a critical role in the development of the host immune response that can be either beneficial or deleterious. This immune response is one pathway to target, to modify the natural evolution of respiratory diseases.. Among them, the team studies two respiratory diseases, the acute respiratory distress syndrome (ARDS), often of infectious origin, and severe asthma.  Due to strong links with the pneumology and critical care departments of the CHU of Lille, we are very focused on translational research from the bench to the clinic.
In the context of ARDS, a link has been shown between low levels of endocan, a proteoglycan cloned in the lab, and the development of ARDS during septic shock (Gaudet et al, J Crit Care, 2018). This led us to evaluate endocan in a cohort of COVID patients hospitalized in critical care depertment of Foch Hospital (Suresnes). The results have shown that endocan was increased in COVID versus non COVID patients, and that patients developing the more severe ARDS had the lowest levels of endocan between D3 and D5 following tbeir admission in critical care,. These data suggest a predictive role of this molecule in in the development of ARDS in COVID patients (Pascreau et al, Crit care, 2021).
In the context of asthma, this disease remains a major challenge because of the diversity of its clinical phenotypes and biological mechanisms. Severe asthma concerns 5 to 10% of total asthmatics (more than 300 millions people in the world), but generates almost the totality of health costs devoted to this disease. Severe asthma is divided schematically in T2 asthma (with an eosinophilic profile) and non T2 asthma (with a neutrophilic or mixed profiles). These patients have frequent exacerbations that can be triggered by infections, allergen exposure or pollutants. In this context, the pulmonary immunity team decipher the immunobiological mechanisms involved in asthma, to propose novel therapeutic targets, by using original experimental models of asthma, and cohorts of asthma patients. We have in particular shown in a T2 experimental model of house dust mite (HDM) allergic asthma that sensing by NOD1 of some bacteria associated to HDM aggravates the severity of asthma in vivo, and that inhibiting this pathway may be a therapeutic approach for asthma (Ait Yahia et al, J Allergy Clin Immunol, 2021). In another model of non T2 asthma induced by dog allergen and inducing a strong bronchial remodelling, inhibition of the pathway leading to IL-22 production attenuates this phenotype (Bouté et al, Allergy, 2021). You will find at the bottom of the page two 3D videos showing bronchial remodelling visualizing collagen fibers (in green) by two-photons microscopy in the lung at baseline, and after allergen challenge in the non T2 model (collaboration E Weirkmeister, Team microbiologie cellulaire et physique de l'infection). As there is currently no biotherapy targeting non T2 asthma, these results are very promising, and studies of proof of concept are underway (START AIRR funded by region Hauts de France) modified mice as well as in asthma patients.

More information about the team : HERE

Peribronchial type I collagen fibers are visualized in green through the generation of second harmonic (SHG) signals by two-photon microscopy in the lung at baseline. The other lung structures appear in red.

Peribronchial type I collagen fibers are visualized in green through the generation of second harmonic (SHG) signals by two-photon microscopy in the lung after dog allergen challenge. Note the triple helical collagen molecules around bronchi.

Titre du document Teams Previously Presented


Persistence and dynamics of fluorescent Lactobacillus plantarum in the healthy versus inflamed gut
Salomé-Desnoulez S, Poiret S, Foligné B, Muharram G, Peucelle V, Lafont F & Daniel C
Gut microbes (2021)

SARS-CoV-2 infection in nonhuman primates alters the composition and functional activity of the gut microbiota.
Harry Sokol, Vanessa Contreras, Pauline Maisonnasse, Aurore Desmons, Benoit Delache, Valentin Sencio, Arnaud Machelart, Angela Brisebarre, Lydie Humbert, Lucie Deryuter, Emilie Gauliard, Severine Heumel, Dominique Rainteau, Nathalie Dereuddre-Bosquet, Elisabeth Menu, Raphael Ho Tsong Fang, Antonin Lamaziere, Loic Brot, Celine Wahl, Cyriane Oeuvray, Nathalie Rolhion, Sylvie Van Der Werf, Stéphanie Ferreira, Roger Le Grand & François Trottein

The UPR sensor IRE1α promotes dendritic cell responses to control Toxoplasmagondii infection
Anaïs F Poncet, Victor Bosteels, Eik Hoffmann, Sylia Chehade, Sofie Rennen, Ludovic Huot, Véronique Peucelle, Sandra Maréchal, Jamal Khalife, Nicolas Blanchard, Sophie Janssens, Sabrina Marion.
EMBO Rep (2021)

TgAP2IX-5 is a key transcriptional regulator of the asexual cell cycle division in Toxoplasma gondii.
Asma S. Khelifa, Cecilia Guillen Sanchez, Kevin M. Lesage, Ludovic Huot, Thomas Mouveaux, Pierre Pericard, Nicolas Barois, Helene Touzet, Guillemette Marot, Emmanuel Roger et Mathieu Gissot.
Nat Commun (2021)

Plasmodium yoelii Uses a TLR3-Dependent Pathway to Achieve Mammalian Host Parasitism
Keswani T, Delcroix-Genete D, Herbert F, Leleu I, Lambert C, Draheim M, Salome-Desnoulez S, Saliou JM, Cazenave PA, Silvie O, Roland J, Pied S. (2020)

Our Youtube chanel

Where are we with antiviral treatments against Covid-19?

Third episode in the series dedicated to researching Covid-19. This webinar is moderated by Marie Treibert, science popularizer on the La Boîte à curiosités channel. She questions Sandrine Belouzard, virologist and CNRS researcher, who answers all questions relating to antivirals in the treatment of Covid-19. What is the difference between a vaccine and an antiviral treatment? How does an antiviral work? Who will benefit from it? Do we favor therapeutic repositioning or research for a new drug? Through definitions, a press review and an interview, this webinar takes stock of the subject.

One year after the first cases of COVID-19, researchers of the Center for Infection & Immunity of Lille present the current knowledge on SARS-CoV-2 in the context of a series of conferences organized by the Lille Research Taskforce on COVID-19, in partnership with the Society of Sciences, Agriculture and Arts of Lille.

Researchs against Covid-19 at the Institut Pasteur in Lille.

Coronaviruses, specificities and prospects for treatment by Jean Dubuisson, director of the Center for Infection & Immunity of Lille

More than 60 diseases can be transmitted to humans by rats. Among them, Plague, believed to be a disease of the past, has never been eradicated ...

"While bats are not to blame for everything, they have played a role in the transmission of at least 11 viruses" ...

COVID-19: Jean Dubuisson tells us about ANTI-CoV, a project supported by the FRM